.codespellrc

@@ -1,30 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-[codespell]
-
-# Skip all translation files and a few other autogenerated files.
-# The autotool files should have their typos fixed in the upstream, but
-# until then we will blacklist them here.
-# THANKS contains names, some do trigger codespell.
-skip = *.po,*.pot,./po4a/man,./doc/api,./configure,./autom4te.cache,./m4/libtool.m4,./build-aux/depcomp,./build-aux/ltmain.sh,./build-aux/config.guess,./build-aux/config.rpath,./m4/po.m4,./build-aux/config.sub,THANKS
-
-# Ignore false positive matching words. Ideally codespell would allow
-# ignoring words for specific files, but that does not appear to be
-# supported. Instead we need to hope we do not make these typos.
-# Additionally, the ignored words must be specified lower-case even though
-# some of the false positives only occurred upper-case.
-# ANS - used as a variable name in xzmore.in.
-# bu - groff syntax for creating a bullet list item, used in xz.1.
-# te - groff syntax, used in xz.1.
-# caf - command line options for tar example, used in xz.1.
-ignore-words-list = ans,bu,te,caf
-
-# Add extra dictionaries to help improvement comments, docs, etc.
-builtin = clear,rare,informal,usage,names
-
-# Always default to highest interactive level to avoid accidentally
-# changing a false positive or picking the wrong replacement.
-interactive = 3
-
-# Ignore a URL with debbugs.
-ignore-regex = \bhttps://debbugs\.gnu\.org\b

.gitattributes

@@ -1,8 +0,0 @@
-.gitattributes export-ignore
-.gitignore export-ignore
-
-/.codespellrc export-ignore
-/.github export-ignore
-
-/build-aux/ci_build.bash export-ignore
-/doc/SHA256SUMS export-ignore

.github/workflows/ci.yml

@@ -1,171 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# Author: Jia Tan
-#
-#############################################################################
-
-name: CI
-
-on:
-  # Triggers the workflow on push or pull request events but only for the master branch
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-  # Allows running workflow manually
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  POSIX:
-    strategy:
-      matrix:
-        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest]
-        build_system: [autotools, cmake]
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 20
-    steps:
-      - uses: actions/checkout@v4
-
-      ########################
-      # Install Dependencies #
-      ########################
-
-      # Install Autotools on Linux
-      - name: Install Dependencies
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: |
-            sudo apt-get update
-            sudo apt-get install -y autoconf automake build-essential po4a autopoint doxygen musl-tools valgrind
-
-      - name: Install Dependencies
-        if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
-        run: |
-            sudo apt-get install -y gcc-multilib
-
-      # Install Autotools on Mac
-      - name: Install Dependencies
-        if: ${{ matrix.os == 'macos-latest' && matrix.build_system == 'autotools' }}
-        run: brew install autoconf automake libtool po4a doxygen
-
-      # Install CMake on Linux
-      - name: Install Dependencies
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'cmake' }}
-        run: |
-            sudo apt-get update
-            sudo apt-get install -y build-essential cmake gettext doxygen musl-tools
-
-      # Install CMake on Mac
-      - name: Install Dependencies
-        if: ${{ matrix.os == 'macos-latest' && matrix.build_system == 'cmake' }}
-        run: brew install cmake gettext doxygen
-
-      ##################
-      # Build and Test #
-      ##################
-
-      # -b specifies the build system to use.
-      # -p specifies the phase (build or test) to help narrow down an error
-      #    if one occurs.
-      #
-      # The first two builds/tests are only run on Autotools Linux and
-      # affect the CFLAGS. Resetting the CFLAGS requires clearing the
-      # config cache between runs, so the tests that require CFLAGS are
-      # done first.
-      - name: Build 32-bit
-        if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
-        run: ./build-aux/ci_build.bash -b autotools -p build -m "gcc -m32"
-      - name: Test 32-bit
-        if: ${{ matrix.os == 'ubuntu-latest' && matrix.build_system == 'autotools' }}
-        run: |
-            ./build-aux/ci_build.bash -b autotools -p test -m "gcc -m32" -n 32_bit
-            cd ../xz_build && make distclean
-
-      # The sandbox must be disabled because it will prevent access to
-      # the /proc/ filesystem on Linux, which is used by the sanitizer's
-      # instrumentation.
-      - name: Build with -fsanitize=address,undefined
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: ./build-aux/ci_build.bash -b autotools -p build -f "-fsanitize=address,undefined" -d sandbox
-      - name: Test with -fsanitize=address,undefined
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: |
-            export UBSAN_OPTIONS=print_stacktrace=1:halt_on_error=1
-            ./build-aux/ci_build.bash -b autotools -p test -f "-fsanitize=address,undefined" -d sandbox
-            cd ../xz_build && make distclean
-
-      - name: Build with Valgrind
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: ./build-aux/ci_build.bash -b autotools -p build -d shared,sandbox
-      - name: Test with Valgrind
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: |
-            ./build-aux/ci_build.bash -b autotools -p test -d sandbox -w "valgrind --quiet --trace-children=yes --trace-children-skip=*/cmp,*/cp,*/diff,*/grep,*/rm,*/sed --exit-on-first-error=yes --error-exitcode=1"
-            cd ../xz_build && make distclean
-
-      - name: Build with musl libc
-        if: ${{ startsWith(matrix.os, 'ubuntu') }}
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -p build -m "/usr/bin/musl-gcc"
-      - name: Test with musl libc
-        if: ${{ startsWith(matrix.os, 'ubuntu') }}
-        run: |
-            ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -p test -m "/usr/bin/musl-gcc"
-      - name: Clean up musl libc run
-        if: ${{ startsWith(matrix.os, 'ubuntu') && matrix.build_system == 'autotools' }}
-        run: cd ../xz_build && make distclean
-
-      - name: Build with full features
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -p build
-      - name: Test with full features
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -p test -n full_features
-
-      - name: Build without encoders
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d encoders,shared -p build
-      - name: Test without encoders
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d encoders,shared -p test -n no_encoders
-
-      - name: Build without decoders
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d decoders,shared -p build
-      - name: Test without decoders
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d decoders,shared -p test -n no_decoders
-
-      - name: Build without threads
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d threads,shared -p build
-      - name: Test without threads
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d threads,shared -p test -n no_threads
-
-      - name: Build without BCJ filters
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d bcj,shared,nls -p build
-      - name: Test without BCJ filters
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d bcj,shared,nls -p test -n no_bcj
-
-      - name: Build without Delta filters
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d delta,shared,nls -p build
-      - name: Test without Delta filters
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d delta,shared,nls -p test -n no_delta
-
-      - name: Build without sha256 check
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -c crc32,crc64 -d shared,nls -p build
-      - name: Test without sha256 check
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -c crc32,crc64 -d shared,nls -p test -n no_sha256
-
-      - name: Build without crc64 check
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -c crc32,sha256 -d shared,nls -p build
-      - name: Test without crc64 check
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -c crc32,sha256 -d shared,nls -p test -n no_crc64
-
-      - name: Build small
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d small -p build
-      - name: Test small
-        run: ./build-aux/ci_build.bash -b ${{ matrix.build_system }} -d small -p test -n small
-
-      # Attempt to upload the test logs as artifacts if any step has failed
-      - uses: actions/upload-artifact@v4
-        if: ${{ failure() }}
-        with:
-          name: ${{ matrix.os }} ${{ matrix.build_system }} Test Logs
-          path: build-aux/artifacts

.github/workflows/cifuzz.yml

@@ -1,55 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-# Authors: Sam James
-#          Lasse Collin
-#
-# This was written based on the OSS-Fuzz docs:
-# https://google.github.io/oss-fuzz/getting-started/continuous-integration/
-
-name: CIFuzz
-
-on:
-  push:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  CIFuzz:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-
-    strategy:
-      fail-fast: false
-      matrix:
-        sanitizer: [ address, undefined, memory ]
-
-    steps:
-    - name: Build Fuzzers (${{ matrix.sanitizer }})
-      id: build
-      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
-      with:
-        oss-fuzz-project-name: 'xz'
-        # The language must match the one in project.yaml in OSS-Fuzz:
-        # https://github.com/google/oss-fuzz/blob/master/projects/xz/project.yaml
-        # Thus, use C++ even though there are no C++ files in XZ Utils.
-        language: c++
-        sanitizer: ${{ matrix.sanitizer }}
-
-    - name: Run Fuzzers (${{ matrix.sanitizer }})
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-      with:
-        oss-fuzz-project-name: 'xz'
-        language: c++
-        sanitizer: ${{ matrix.sanitizer }}
-        fuzz-seconds: 600
-        report-timeouts: true
-        report-ooms: true
-
-    - name: Upload Crash
-      uses: actions/upload-artifact@v4
-      if: failure() && steps.build.outcome == 'success'
-      with:
-        name: ${{ matrix.sanitizer }}-artifacts
-        path: ./out/artifacts

.github/workflows/coverity.yml

@@ -1,38 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: Coverity Scan
-
-# We only want to test a special branch, per
-# https://docs.travis-ci.com/user/coverity-scan/#build-submission-frequency
-on:
-  push:
-    branches: [coverity_scan]
-
-jobs:
-  coverity:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Install dependencies
-      run: |
-        sudo apt-get update -q
-        sudo apt-get install -qy autoconf automake build-essential autopoint gcc-multilib
-
-    - name: Run autogen.sh
-      run: ./autogen.sh --no-po4a
-
-    - name: Run configure
-      run: ./configure --enable-debug --disable-silent-rules
-
-    # Coverity doesn't understand what the inline asm does,
-    # which results in false positives.
-    - name: Disable complex inline assembly code
-      run: echo '#define LZMA_RANGE_DECODER_CONFIG 0' >> config.h
-
-    - name: Coverity Scan
-      uses: vapier/coverity-scan-action@2068473c7bdf8c2fb984a6a40ae76ee7facd7a85 # v1.8.0
-      with:
-        command: make -Oline -j$(nproc)
-        email: ${{ secrets.COVERITY_SCAN_EMAIL }}
-        token: ${{ secrets.COVERITY_SCAN_TOKEN }}

.github/workflows/dragonflybsd.yml

@@ -1,40 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: DragonFly BSD
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  DragonflyBSD:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    name: DragonFly BSD
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Test in DragonFly BSD
-        id: test
-        uses: vmactions/dragonflybsd-vm@4ffb90652b45abc8156f89ede453c85f7ea257bb #v1.1.4
-        with:
-          usesh: true
-          prepare: >
-            pkg install -y
-            autoconf
-            automake
-            gettext-tools
-            libtool
-            m4
-          run: |
-            set -e
-            uname -a
-            ./autogen.sh --no-po4a
-            # Innocent putc() triggers strict-overflow warnings.
-            ./configure --disable-static --enable-debug --enable-werror CFLAGS='-g -O2 -pipe -Wno-error=strict-overflow'
-            make -j4 check

.github/workflows/freebsd.yml

@@ -1,58 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: FreeBSD
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  FreeBSD:
-    strategy:
-      matrix:
-        include:
-          - host: ubuntu-latest
-            version: 12.4
-            arch: x86_64
-          - host: ubuntu-latest
-            version: 15.0
-            arch: x86_64
-          # NOTE: Comment in the repo says that aarch64 VM is faster
-          # on x86_64 host compared to ubuntu-24.04-arm.
-          # - host: ubuntu-24.04-arm
-          #   version: 15.0
-          #   arch: aarch64
-
-    runs-on: ${{ matrix.host }}
-    timeout-minutes: 10
-
-    name: FreeBSD
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Test in FreeBSD
-        uses: vmactions/freebsd-vm@670398e4236735b8b65805c3da44b7a511fb8b27 #v1.3.0
-        with:
-          release: ${{ matrix.release }}
-          arch: ${{ matrix.arch }}
-          usesh: true
-          prepare: >
-            pkg install -y
-            autoconf
-            automake
-            gettext-tools
-            libtool
-            m4
-            po4a
-          run: |
-            set -e
-            uname -a
-            ./autogen.sh
-            ./configure --disable-static --enable-debug --enable-werror
-            make -j4 check

.github/workflows/msvc.yml

@@ -1,138 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-# Author: Lasse Collin
-
-name: Windows-MSVC
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  MSVC:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ windows-latest ]
-
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 10
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Configure Win32
-        run: >
-          cmake
-          -A Win32
-          -B build-msvc-win32
-
-      - name: Build Win32 Debug
-        run: >
-          cmake
-          --build build-msvc-win32
-          --config Debug
-
-      - name: Test Win32 Debug
-        run: >
-          ctest
-          --test-dir build-msvc-win32
-          --build-config Debug
-          --output-on-failure
-
-      - name: Build Win32 Release
-        run: >
-          cmake
-          --build build-msvc-win32
-          --config Release
-
-      # This fails with VS 2019 without b5a5d9e3f702.
-      - name: Test Win32 Release
-        run: >
-          ctest
-          --test-dir build-msvc-win32
-          --build-config Release
-          --output-on-failure
-
-      - name: Configure x64
-        run: >
-          cmake
-          -A x64
-          -B build-msvc-x64
-
-      - name: Build x64 Debug
-        run: >
-          cmake
-          --build build-msvc-x64
-          --config Debug
-
-      - name: Test x64 Debug
-        run: >
-          ctest
-          --test-dir build-msvc-x64
-          --build-config Debug
-          --output-on-failure
-
-      - name: Build x64 Release
-        run: >
-          cmake
-          --build build-msvc-x64
-          --config Release
-
-      - name: Test x64 Release
-        run: >
-          ctest
-          --test-dir build-msvc-x64
-          --build-config Release
-          --output-on-failure
-
-      - name: Configure ClangCL x64
-        run: >
-          cmake
-          -T ClangCL
-          -A x64
-          -B build-clangcl-x64
-          -DCMAKE_C_FLAGS="
-            -Wno-cast-align
-            -Wno-cast-qual
-            -Wno-covered-switch-default
-            -Wno-declaration-after-statement
-            -Wno-deprecated-declarations
-            -Wno-disabled-macro-expansion
-            -Wno-nonportable-system-include-path
-            -Wno-overlength-strings
-            -Wno-pre-c11-compat
-            -Wno-reserved-identifier
-            -Wno-unsafe-buffer-usage
-            -Wno-used-but-marked-unused"
-
-      - name: Build ClangCL x64 Debug
-        run: >
-          cmake
-          --build build-clangcl-x64
-          --config Debug
-
-      - name: Test ClangCL x64 Debug
-        run: >
-          ctest
-          --test-dir build-clangcl-x64
-          --build-config Debug
-          --output-on-failure
-
-      - name: Build ClangCL x64 Release
-        run: >
-          cmake
-          --build build-clangcl-x64
-          --config Release
-
-      - name: Test ClangCL x64 Release
-        run: >
-          ctest
-          --test-dir build-clangcl-x64
-          --build-config Release
-          --output-on-failure

.github/workflows/msys2.yml

@@ -1,148 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# Authors: Jia Tan
-#          Lasse Collin
-#
-#############################################################################
-
-name: Windows-MSYS2
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  MSYS2:
-    strategy:
-      fail-fast: false
-      matrix:
-        runner: [ windows-latest ]
-        sys: [ mingw32, ucrt64, clang64, msys ]
-        include:
-          - runner: windows-11-arm
-            sys: clangarm64
-
-    # Set the shell to be msys2 as a default to avoid setting it for
-    # every individual run command.
-    defaults:
-      run:
-        shell: msys2 {0}
-
-    runs-on: ${{ matrix.runner }}
-    timeout-minutes: 20
-
-    steps:
-      - name: Setup MSYS2
-        if: ${{ matrix.sys == 'msys' }}
-        uses: msys2/setup-msys2@fb197b72ce45fb24f17bf3f807a388985654d1f2 # v2.29.0
-        with:
-          msystem: ${{ matrix.sys }}
-          update: true
-          install: >
-            make
-            ninja
-            autotools
-            cmake
-            base-devel
-            gettext-devel
-            gcc
-
-      - name: Setup MSYS2
-        if: ${{ matrix.sys != 'msys' }}
-        uses: msys2/setup-msys2@fb197b72ce45fb24f17bf3f807a388985654d1f2 # v2.29.0
-        with:
-          msystem: ${{ matrix.sys }}
-          update: true
-          pacboy: >
-            make:p
-            ninja:p
-            autotools:p
-            cmake:p
-            toolchain:p
-            gettext:p
-
-      - name: Git configuration
-        # Need to explicitly set the shell here since we set the default
-        # shell as msys2 earlier. This avoids an extra msys2 dependency on
-        # git.
-        shell: powershell
-        # Avoid Windows line endings. Otherwise test_scripts.sh will fail
-        # because the expected output is stored in the test framework as a
-        # text file and will not match the output from xzgrep.
-        run: git config --global core.autocrlf false
-
-      - uses: actions/checkout@v4
-
-      - name: CMake (full, shared)
-        run: |
-          set -e
-          cmake -G Ninja -B b-cmake-full \
-              -DBUILD_SHARED_LIBS=ON \
-              -DCMAKE_C_FLAGS='-UNDEBUG -g -O2 -pipe' \
-              -DCMAKE_COMPILE_WARNING_AS_ERROR=ON \
-              ${{ startsWith(matrix.sys, 'mingw') && '-DXZ_NLS=OFF' || '' }}
-          ninja -C b-cmake-full
-          ctest --test-dir b-cmake-full --output-on-failure
-
-      - name: CMake (small, static)
-        if: ${{ matrix.runner == 'windows-latest' }}
-        run: |
-          set -e
-          cmake -G Ninja -B b-cmake-small \
-              -DBUILD_SHARED_LIBS=OFF \
-              -DCMAKE_C_FLAGS='-UNDEBUG -g -Os -pipe' \
-              -DCMAKE_COMPILE_WARNING_AS_ERROR=ON \
-              -DXZ_SMALL=ON \
-              -DXZ_THREADS=no \
-              -DXZ_NLS=OFF
-          ninja -C b-cmake-small
-          ctest --test-dir b-cmake-small --output-on-failure
-
-      - name: autogen.sh
-        run: ./autogen.sh --no-po4a
-
-      - name: Autotools (full, shared)
-        run: |
-          set -e
-          mkdir b-autotools-full
-          cd b-autotools-full
-          ../configure \
-              --enable-debug \
-              --enable-werror \
-              --disable-static \
-              ${{ startsWith(matrix.sys, 'mingw') && '--disable-nls' || '' }}
-          make -j"$(nproc)" check
-
-      - name: Autotools (small, static)
-        if: ${{ matrix.runner == 'windows-latest' }}
-        run: |
-          set -e
-          mkdir b-autotools-small
-          cd b-autotools-small
-          ../configure \
-              --enable-debug \
-              --enable-werror \
-              --disable-shared \
-              --enable-small \
-              --disable-threads \
-              --disable-nls \
-              CFLAGS='-g -Os'
-          make -j"$(nproc)" check
-
-      # Upload the test logs as artifacts if any step has failed.
-      - uses: actions/upload-artifact@v4
-        if: failure()
-        with:
-          name: test-logs-${{ matrix.sys }}
-          path: |
-            b-cmake-*/Testing/Temporary/
-            b-cmake-*/test_*/
-            b-autotools-*/tests/*.log
-            b-autotools-*/tests/*output

.github/workflows/netbsd.yml

@@ -1,40 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: NetBSD
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  NetBSD:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    name: NetBSD
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Test in NetBSD
-        id: test
-        uses: vmactions/netbsd-vm@b24ed5f7a605362ab1226e73df291c8b01990c85 #v1.2.3
-        with:
-          usesh: true
-          prepare: >
-            /usr/sbin/pkg_add -v
-            cmake
-            gettext-tools
-            ninja-build
-            po4a
-          run: |
-            set -e
-            uname -a
-            ./po4a/update-po
-            # Innocent putc() triggers strict-overflow warnings.
-            cmake -G Ninja -B build -DBUILD_SHARED_LIBS=ON -DCMAKE_C_FLAGS='-UNDEBUG -g -O2 -pipe -Wno-error=strict-overflow' -DCMAKE_COMPILE_WARNING_AS_ERROR=ON
-            ninja -C build
-            ctest --test-dir build --output-on-failure

.github/workflows/openbsd.yml

@@ -1,40 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: OpenBSD
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  OpenBSD:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    name: OpenBSD
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Test in OpenBSD
-        uses: vmactions/openbsd-vm@2e29de1eb150dfe1c9c97b84ff2b7896f14ca690 #v1.2.5
-        with:
-          usesh: true
-          prepare: >
-            /usr/sbin/pkg_add -I -v
-            autoconf-2.72p0
-            automake-1.17
-            gettext-tools
-            libtool
-            m4
-          run: |
-            set -e
-            export AUTOCONF_VERSION=2.72
-            export AUTOMAKE_VERSION=1.17
-            uname -a
-            ./autogen.sh --no-po4a
-            ./configure --disable-static --enable-debug --enable-werror --disable-nls --enable-external-sha256
-            make -j4 check

.github/workflows/solaris.yml

@@ -1,34 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-name: Solaris
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
-
-permissions: {}
-
-jobs:
-  Solaris:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    name: Solaris
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Test in Solaris
-        uses: vmactions/solaris-vm@47bea106d03acaf91084e52548ee460556011602 #v1.1.8
-        with:
-          release: 11.4-gcc
-          usesh: true
-          run: |
-            set -e
-            uname -a
-            # /usr/xpg4/bin isn't in PATH by default.
-            echo "Environment variable PATH: $PATH"
-            ./autogen.sh --no-po4a
-            ./configure --disable-static --enable-debug --enable-werror
-            make check

.gitignore

@@ -1,113 +0,0 @@
-*~
-*.bak
-*.bak[0-9]
-.gdb_history
-
-.deps
-.libs
-*.a
-*.gcda
-*.gcno
-*.la
-*.lo
-*.o
-Makefile.in
-
-/ABOUT-NLS
-/autom4te.cache
-/aclocal.m4
-/config.h
-/config.h.in
-/config.log
-/config.status
-/configure
-/libtool
-/stamp-h1
-
-build-aux/artifacts
-build-aux/compile
-build-aux/config.guess
-build-aux/config.rpath
-build-aux/config.sub
-build-aux/depcomp
-build-aux/install-sh
-build-aux/ltmain.sh
-build-aux/missing
-build-aux/test-driver
-
-coverage
-
-/doc/internal
-/doc/api
-
-/po4a/man
-/po4a/xz-man.pot
-/po4a/*.po.authors
-
-/src/liblzma/liblzma.pc
-/src/lzmainfo/lzmainfo
-/src/xz/xz
-/src/xzdec/lzmadec
-/src/xzdec/xzdec
-
-/src/scripts/xzdiff
-/src/scripts/xzgrep
-/src/scripts/xzless
-/src/scripts/xzmore
-
-/tests/*.log
-/tests/*.trs
-/tests/compress_generated_abc
-/tests/compress_generated_random
-/tests/compress_generated_text
-/tests/create_compress_files
-/tests/test_bcj_exact_size
-/tests/test_block_header
-/tests/test_check
-/tests/test_filter_flags
-/tests/test_filter_str
-/tests/test_hardware
-/tests/test_index
-/tests/test_index_hash
-/tests/test_lzip_decoder
-/tests/test_microlzma
-/tests/test_memlimit
-/tests/test_stream_flags
-/tests/test_vli
-/tests/xzgrep_test_1.xz
-/tests/xzgrep_test_2.xz
-/tests/xzgrep_test_output
-
-/lib/Makefile
-/tests/Makefile
-/Makefile
-/debug/Makefile
-/src/scripts/Makefile
-/src/xz/Makefile
-/src/Makefile
-/src/liblzma/Makefile
-/src/liblzma/api/Makefile
-/src/lzmainfo/Makefile
-/src/xzdec/Makefile
-
-/CMakeCache.txt
-/CMakeFiles
-/CTestTestfile.cmake
-/cmake_install.cmake
-/DartConfiguration.tcl
-/liblzma-config-version.cmake
-/liblzma-config.cmake
-/Testing
-/tests_bin/
-/xz
-/xzdec
-/lzmadec
-/lzmainfo
-/xzdiff
-/xzgrep
-/xzless
-/xzmore
-/liblzma.pc
-/*.gmo
-
-/.vscode/

AUTHORS

@@ -1,58 +1,18 @@
 
-Authors of XZ Utils
+Authors of LZMA Utils
-===================
+---------------------
 
-    XZ Utils is developed and maintained by
+Igor Pavlov
-    Lasse Collin <lasse.collin@tukaani.org>.
+  * designed LZMA as an algorithm;
+  * wrote an implementation known as LZMA SDK, which is part of
+    the bigger 7-Zip project.
 
-    Major parts of liblzma are based on code written by Igor Pavlov,
+Ville Koskinen
-    specifically the LZMA SDK <https://7-zip.org/sdk.html>. Without
+  * wrote the first version of the gzip-like lzma command line
-    this code, XZ Utils wouldn't exist.
+    utility (C++)
+  * helped a lot with the documentation.
 
-    The SHA-256 implementation in liblzma is based on code written by
+Lasse Collin
-    Wei Dai in Crypto++ Library <https://www.cryptopp.com/>.
+  * ported LZMA SDK to C and zlib-like API (liblzma);
-
+  * rewrote the command line tool again to use liblzma and pthreads.
-    A few scripts have been adapted from GNU gzip. The original
-    versions were written by Jean-loup Gailly, Charles Levert, and
-    Paul Eggert. Andrew Dudman helped adapting the scripts and their
-    man pages for XZ Utils.
-
-    The initial version of the threaded .xz decompressor was written
-    by Sebastian Andrzej Siewior.
-
-    The initial version of the .lz (lzip) decoder was written
-    by Michał Górny.
-
-    Architecture-specific CRC optimizations were contributed by
-    Ilya Kurdyukov, Chenxi Mao, and Xi Ruoyao.
-
-    Other authors:
-      - Jonathan Nieder
-      - Joachim Henke
-
-    Special author: Jia Tan was a co-maintainer in 2022-2024. He and
-    the team behind him inserted a backdoor (CVE-2024-3094) into
-    XZ Utils 5.6.0 and 5.6.1 releases. He suddenly disappeared when
-    this was discovered.
-
-    Many people have contributed improvements or reported bugs.
-    Most of these people are mentioned in the file THANKS.
-
-    The translations of the command line tools and man pages have been
-    contributed by many people via the Translation Project:
-
-      - https://translationproject.org/domain/xz.html
-      - https://translationproject.org/domain/xz-man.html
-
-    The authors of the translated man pages are in the header comments
-    of the man page files. In the source package, the authors of the
-    translations are in po/*.po and po4a/*.po files.
-
-    Third-party code whose authors aren't listed here:
-
-      - GNU getopt_long() in the 'lib' directory is included for
-        platforms that don't have a usable getopt_long().
-
-      - The build system files from GNU Autoconf, GNU Automake,
-        GNU Libtool, GNU Gettext, Autoconf Archive, and related files.
 

COPYING

@@ -1,70 +1,25 @@
 
-XZ Utils Licensing
+LZMA Utils Licenses
-==================
+-------------------
 
     Different licenses apply to different files in this package. Here
-    is a summary of which licenses apply to which parts of this package:
+    is a rough summary of which license apply to which parts of this
+    package (but check the individual files to be sure!):
+      - Everything under src/liblzma/check and tests/files is public
+        domain.
+      - Everything else under the src directory is under the GNU LGPL
+        2.1 or (at your opinion) any later version.
+      - Outside the src directory, there are some files that are under
+        the GNU GPL 2 or (at your opinion) any later version, or under
+        the GNU GPL 3 or (at your opinion) any later version.
+      - Most documentation files are under an all-permissive license.
 
-      - liblzma is under the BSD Zero Clause License (0BSD).
+    The following license texts are included in the following files
-
+    in this package:
-      - The command line tools xz, xzdec, lzmadec, and lzmainfo are
-        under 0BSD except that, on systems that don't have a usable
-        getopt_long, GNU getopt_long is compiled and linked in from the
-        'lib' directory. The getopt_long code is under GNU LGPLv2.1+.
-
-      - The scripts to grep, diff, and view compressed files have been
-        adapted from GNU gzip. These scripts (xzgrep, xzdiff, xzless,
-        and xzmore) are under GNU GPLv2+. The man pages of the scripts
-        are under 0BSD; they aren't based on the man pages of GNU gzip.
-
-      - Most of the XZ Utils specific documentation that is in
-        plain text files (like README, INSTALL, PACKAGERS, NEWS,
-        and ChangeLog) are under 0BSD unless stated otherwise in
-        the file itself. The files xz-file-format.txt and
-        lzma-file-format.xt are in the public domain but may
-        be distributed under the terms of 0BSD too.
-
-      - Translated messages and man pages are under 0BSD except that
-        some old translations are in the public domain.
-
-      - Test files and test code in the 'tests' directory, and
-        debugging utilities in the 'debug' directory are under
-        the BSD Zero Clause License (0BSD).
-
-      - The GNU Autotools based build system contains files that are
-        under GNU GPLv2+, GNU GPLv3+, and a few permissive licenses.
-        These files don't affect the licensing of the binaries being
-        built.
-
-      - The 'extra' directory contains files that are under various
-        free software licenses. These aren't built or installed as
-        part of XZ Utils.
-
-    The following command may be helpful in finding per-file license
-    information. It works on xz.git and on a clean file tree extracted
-    from a release tarball.
-
-        sh build-aux/license-check.sh -v
-
-    For the files under the BSD Zero Clause License (0BSD), if
-    a copyright notice is needed, the following is sufficient:
-
-        Copyright (C) The XZ Utils authors and contributors
-
-    If you copy significant amounts of 0BSD-licensed code from XZ Utils
-    into your project, acknowledging this somewhere in your software is
-    polite (especially if it is proprietary, non-free software), but
-    it is not legally required by the license terms. Here is an example
-    of a good notice to put into "about box" or into documentation:
-
-        This software includes code from XZ Utils <https://tukaani.org/xz/>.
-
-    The following license texts are included in the following files:
-      - COPYING.0BSD: BSD Zero Clause License
       - COPYING.LGPLv2.1: GNU Lesser General Public License version 2.1
       - COPYING.GPLv2: GNU General Public License version 2
       - COPYING.GPLv3: GNU General Public License version 3
 
-    If you have questions, don't hesitate to ask for more information.
+    If you have questions, don't hesitate to ask the copyright holder(s)
-    The contact information is in the README file.
+    for more information.
 

COPYING.0BSD

@@ -1,11 +0,0 @@
-Permission to use, copy, modify, and/or distribute this
-software for any purpose with or without fee is hereby granted.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
-WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
-THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
-CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
-NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
-CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

COPYING.GPLv2

@@ -2,7 +2,7 @@
 		       Version 2, June 1991
 
  Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- <https://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -304,7 +304,8 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
-    with this program; if not, see <https://www.gnu.org/licenses/>.
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -328,8 +329,8 @@ necessary.  Here is a sample; alter the names:
   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
   `Gnomovision' (which makes passes at compilers) written by James Hacker.
 
-  <signature of Moe Ghoul>, 1 April 1989
+  <signature of Ty Coon>, 1 April 1989
-  Moe Ghoul, President of Vice
+  Ty Coon, President of Vice
 
 This General Public License does not permit incorporating your program into
 proprietary programs.  If your program is a subroutine library, you may

COPYING.GPLv3

@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
+<http://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

COPYING.LGPLv2.1

@@ -2,7 +2,7 @@
 		       Version 2.1, February 1999
 
  Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- <https://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -484,7 +484,8 @@ convey the exclusion of warranty; and each file should have at least the
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, see <https://www.gnu.org/licenses/>.
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -495,7 +496,9 @@ necessary.  Here is a sample; alter the names:
   Yoyodyne, Inc., hereby disclaims all copyright interest in the
   library `Frob' (a library for tweaking knobs) written by James Random Hacker.
 
-  <signature of Moe Ghoul>, 1 April 1990
+  <signature of Ty Coon>, 1 April 1990
-  Moe Ghoul, President of Vice
+  Ty Coon, President of Vice
 
 That's all there is to it!
+
+

ChangeLog

@@ -1,7 +1,2 @@
 See the commit log in the git repository:
-
+git://ctrl.tukaani.org/lzma-utils.git
-    git clone https://github.com/tukaani-project/xz
-
-Note that "make dist" doesn't put this tiny file into the package.
-Instead, the git commit log is used as ChangeLog. See dist-hook in
-Makefile.am for details.

INSTALL

@@ -1,976 +0,0 @@
-
-XZ Utils Installation
-=====================
-
-    0. Preface
-    1. Supported platforms
-       1.1. Compilers
-       1.2. Platform-specific notes
-            1.2.1. AIX
-            1.2.2. IRIX
-            1.2.3. MINIX 3
-            1.2.4. OpenVMS
-            1.2.5. Solaris, OpenSolaris, and derivatives
-            1.2.6. Tru64
-            1.2.7. Windows
-            1.2.8. DOS
-            1.2.9. z/OS
-       1.3. Adding support for new platforms
-    2. configure and CMake options
-       2.1. Static vs. dynamic linking of liblzma
-       2.2. Optimizing xzdec and lzmadec
-    3. xzgrep and other scripts
-       3.1. Dependencies
-       3.2. PATH
-    4. Tests
-       4.1 Testing in parallel
-       4.2 Cross compiling
-    5. Troubleshooting
-       5.1. "No C99 compiler was found."
-       5.2. "No POSIX conforming shell (sh) was found."
-       5.3. configure works but build fails at crc32_x86.S
-       5.4. Lots of warnings about symbol visibility
-       5.5. "make check" fails
-       5.6. liblzma.so (or similar) not found when running xz
-
-
-0. Preface
-----------
-
-    If you aren't familiar with building packages that use GNU Autotools,
-    see the file INSTALL.generic for generic instructions before reading
-    further.
-
-    If you are going to build a package for distribution, see also the
-    file PACKAGERS. It contains information that should help making the
-    binary packages as good as possible, but the information isn't very
-    interesting to those making local builds for private use or for use
-    in special situations like embedded systems.
-
-
-1. Supported platforms
-----------------------
-
-    XZ Utils are developed on GNU/Linux, but they should work on many
-    POSIX-like operating systems like *BSDs and Solaris, and even on
-    a few non-POSIX operating systems.
-
-
-1.1. Compilers
-
-    A C99 compiler is required to compile XZ Utils. If you use GCC, you
-    need at least version 3.x.x. GCC version 2.xx.x doesn't support some
-    C99 features used in XZ Utils source code, thus GCC 2 won't compile
-    XZ Utils.
-
-    XZ Utils takes advantage of some GNU C extensions when building
-    with GCC. Because these extensions are used only when building
-    with GCC, it should be possible to use any C99 compiler.
-
-
-1.2. Platform-specific notes
-
-1.2.1. AIX
-
-    If you use IBM XL C compiler, pass CC=xlc_r to configure. If
-    you use CC=xlc instead, you must disable threading support
-    with --disable-threads (usually not recommended).
-
-    If building a 32-bit executable, the address space available to xz
-    might be limited to 256 MiB by default. To increase the address
-    space to 2 GiB, pass LDFLAGS=-Wl,-bmaxdata:0x80000000 as an argument
-    to configure.
-
-
-1.2.2. IRIX
-
-    MIPSpro 7.4.4m has been reported to produce broken code if using
-    the -O2 optimization flag ("make check" fails). Using -O1 should
-    work.
-
-    A problem has been reported when using shared liblzma. Passing
-    --disable-shared to configure works around this. Alternatively,
-    putting "-64" to CFLAGS to build a 64-bit version might help too.
-
-
-1.2.3. MINIX 3
-
-    Version 3.3.0 and later are supported.
-
-    Multithreading isn't supported because MINIX 3 doesn't have
-    pthreads. The option --disable-threads must be passed to configure
-    as this isn't autodetected.
-
-    Note that disabling threads causes "make check" to show a few tests
-    as skipped ("SKIP"). It's only due to a few threading-dependent
-    subtests are skipped. See the matching tests/test_*.log files.
-
-
-1.2.4. OpenVMS
-
-    XZ Utils can be built for OpenVMS, but the build system files
-    are not included in the XZ Utils source package. The required
-    OpenVMS-specific files are maintained by Jouk Jansen and can be
-    downloaded here:
-
-        http://nchrem.tnw.tudelft.nl/openvms/software2.html#xzutils
-
-
-1.2.5. Solaris, OpenSolaris, and derivatives
-
-    The following linker error has been reported on some x86 systems:
-
-        ld: fatal: relocation error: R_386_GOTOFF: ...
-
-    This can be worked around by passing gl_cv_cc_visibility=no
-    as an argument to the configure script.
-
-    test_scripts.sh in "make check" may fail if good enough tools are
-    missing from PATH (/usr/xpg4/bin or /usr/xpg6/bin). Nowadays
-    /usr/xpg4/bin is added to the script PATH by default on Solaris
-    (see --enable-path-for-scripts=PREFIX in section 2), but old xz
-    releases needed extra steps. See sections 5.5 and 3.2 for more
-    information.
-
-
-1.2.6. Tru64
-
-    If you try to use the native C compiler on Tru64 (passing CC=cc to
-    configure), you may need the workaround mention in section 5.1 in
-    this file (pass also ac_cv_prog_cc_c99= to configure).
-
-
-1.2.7. Windows
-
-    The "windows" directory contains instructions for a few types
-    of builds:
-
-      - INSTALL-MinGW-w64_with_CMake.txt
-                Simple instructions how to build XZ Utils natively on
-                Windows using only CMake and a prebuilt toolchain
-                (GCC + MinGW-w64 or Clang/LLVM + MinGW-w64).
-
-      - INSTALL-MinGW-w64_with_Autotools.txt
-                Native build under MSYS2 or cross-compilation from
-                GNU/Linux using a bash script that creates a .zip
-                and .7z archives of the binaries and documentation.
-                The related file README-Windows.txt is for the
-                resulting binary package.
-
-      - INSTALL-MSVC.txt
-                Building with MSVC / Visual Studio and CMake.
-
-      - liblzma-crt-mixing.txt
-                Documentation what to take into account as a programmer
-                if liblzma.dll and the application don't use the same
-                CRT (MSVCRT or UCRT).
-
-    Other choices:
-
-      - Cygwin: https://cygwin.com/
-        Building on Cygwin can be done like on many POSIX operating
-        systems. XZ Utils >= 5.2.0 isn't compatible with Cygwin older
-        than 1.7.35 (data loss!). 1.7.35 was released on 2015-03-04.
-
-      - MSYS2: https://www.msys2.org/
-
-
-1.2.8. DOS
-
-    There is a Makefile in the "dos" directory to build XZ Utils on
-    DOS using DJGPP. Support for long file names (LFN) is needed at
-    build time but the resulting xz.exe works without LFN support too.
-    See dos/INSTALL.txt and dos/README.txt for more information.
-
-
-1.2.9. z/OS
-
-    To build XZ Utils on z/OS UNIX System Services using xlc, pass
-    these options to the configure script: CC='xlc -qhaltonmsg=CCN3296'
-    CPPFLAS='-D_UNIX03_THREADS -D_XOPEN_SOURCE=600'. The first makes
-    xlc throw an error if a header file is missing, which is required
-    to make the tests in configure work. The CPPFLAGS are needed to
-    get pthread support (some other CPPFLAGS may work too; if there
-    are problems, try -D_UNIX95_THREADS instead of -D_UNIX03_THREADS).
-
-    test_scripts.sh in "make check" will fail even if the scripts
-    actually work because the test data includes compressed files
-    with US-ASCII text.
-
-    No other tests should fail. If test_files.sh fails, check that
-    the included .xz test files weren't affected by EBCDIC conversion.
-
-    XZ Utils doesn't have code to detect the amount of physical RAM and
-    number of CPU cores on z/OS.
-
-
-1.3. Adding support for new platforms
-
-    If you have written patches to make XZ Utils to work on previously
-    unsupported platform, please send the patches to me! I will consider
-    including them to the official version. It's nice to minimize the
-    need of third-party patching.
-
-    One exception: Don't request or send patches to change the whole
-    source package to C89. I find C99 substantially nicer to write and
-    maintain. However, the public library headers must be in C89 to
-    avoid frustrating those who maintain programs, which are strictly
-    in C89 or C++.
-
-
-2. configure and CMake options
-------------------------------
-
-    In most cases, the defaults are what you want. Many of the options
-    below are useful only when building a size-optimized version of
-    liblzma or command line tools.
-
-    configure options are those that begin with two dashes "--"
-    or "gl_".
-
-    CMake options begin with "XZ_", "TUKLIB_", or "CMAKE_". To use
-    them on the command line, prefix them with "-D", for example,
-    "cmake -DCMAKE_COMPILE_WARNING_AS_ERROR=ON".
-
-    CMAKE_BUILD_TYPE=TYPE
-                CMake only:
-
-                For release builds, CMAKE_BUILD_TYPE=Release is fine.
-                On targets where CMake defaults to -O3, the default
-                value is overridden to -O2.
-
-                Empty value (CMAKE_BUILD_TYPE=) is fine if using custom
-                optimization options. *In this package* the empty build
-                type also disables debugging code just like "Release"
-                does. To enable debugging code with empty build type,
-                use -UNDEBUG in the CFLAGS environment variable or in
-                the CMAKE_C_FLAGS CMake variable to override -DNDEBUG.
-
-                Non-standard build types like "None" do NOT disable
-                debugging code! Such non-standard build types should
-                be avoided for production builds!
-
-    --enable-encoders=LIST
-    --disable-encoders
-    XZ_ENCODERS=LIST
-                Specify a LIST of filter encoders to build. In the
-                configure option the list is comma separated.
-                CMake lists are semicolon separated.
-
-                To see the exact list of available filter encoders:
-
-                  - Autotools: ./configure --help
-
-                  - CMake: Configure the tree normally first, then use
-                    "cmake -LH ." to list the cache variables.
-
-                The default is to build all supported encoders.
-
-                If LIST is empty or --disable-encoders is used, no filter
-                encoders will be built and also the code shared between
-                encoders will be omitted.
-
-                Disabling encoders will remove some symbols from the
-                liblzma ABI, so this option should be used only when it
-                is known to not cause problems.
-
-    --enable-decoders=LIST
-    --disable-decoders
-    XZ_DECODERS=LIST
-                This is like --enable-encoders but for decoders. The
-                default is to build all supported decoders.
-
-    --enable-match-finders=LIST
-    XZ_MATCH_FINDERS=LIST
-                liblzma includes two categories of match finders:
-                hash chains and binary trees. Hash chains (hc3 and hc4)
-                are quite fast but they don't provide the best compression
-                ratio. Binary trees (bt2, bt3 and bt4) give excellent
-                compression ratio, but they are slower and need more
-                memory than hash chains.
-
-                You need to enable at least one match finder to build the
-                LZMA1 or LZMA2 filter encoders. Usually hash chains are
-                used only in the fast mode, while binary trees are used to
-                when the best compression ratio is wanted.
-
-                The default is to build all the match finders if LZMA1
-                or LZMA2 filter encoders are being built.
-
-    --enable-checks=LIST
-    XZ_CHECKS=LIST
-                liblzma support multiple integrity checks. CRC32 is
-                mandatory, and cannot be omitted. Supported check
-                types are "crc32", "crc64", and "sha256". By default
-                all supported check types are enabled.
-
-                liblzma and the command line tools can decompress files
-                which use unsupported integrity check type, but naturally
-                the file integrity cannot be verified in that case.
-
-                Disabling integrity checks may remove some symbols from
-                the liblzma ABI, so this option should be used only when
-                it is known to not cause problems.
-
-    --enable-external-sha256
-    XZ_EXTERNAL_SHA256=ON
-                Try to use SHA-256 code from the operating system libc
-                or similar base system libraries. This doesn't try to
-                use OpenSSL or libgcrypt or such libraries.
-
-                The reasons to use this option:
-
-                  - It makes liblzma slightly smaller.
-
-                  - It might improve SHA-256 speed if the implementation
-                    in the operating is very good (but see below).
-
-                External SHA-256 is disabled by default for two reasons:
-
-                  - On some operating systems the symbol names of the
-                    SHA-256 functions conflict with OpenSSL's libcrypto.
-                    This causes weird problems such as decompression
-                    errors if an application is linked against both
-                    liblzma and libcrypto. This problem affects at least
-                    FreeBSD 10 and older and MINIX 3.3.0 and older, but
-                    other OSes that provide a function "SHA256_Init" might
-                    also be affected. FreeBSD 11 has the problem fixed.
-                    NetBSD had the problem but it was fixed it in 2009
-                    already. OpenBSD uses "SHA256Init" and thus never had
-                    a conflict with libcrypto.
-
-                  - The SHA-256 code in liblzma is faster than the SHA-256
-                    code provided by some operating systems. If you are
-                    curious, build two copies of xz (internal and external
-                    SHA-256) and compare the decompression (xz --test)
-                    times:
-
-                        dd if=/dev/zero bs=1024k count=1024 \
-                            | xz -v -0 -Csha256 > foo.xz
-                        time xz --test foo.xz
-
-    --disable-microlzma
-    XZ_MICROLZMA_ENCODER=OFF
-    XZ_MICROLZMA_DECODER=OFF
-                Don't build MicroLZMA encoder and decoder. This omits
-                lzma_microlzma_encoder() and lzma_microlzma_decoder()
-                API functions from liblzma. These functions are needed
-                by specific applications only. They were written for
-                erofs-utils but they may be used by others too.
-
-    --disable-lzip-decoder
-    XZ_LZIP_DECODER=OFF
-                Disable decompression support for .lz (lzip) files.
-                This omits the API function lzma_lzip_decoder() from
-                liblzma and .lz support from the xz tool.
-
-    --disable-xz
-    --disable-xzdec
-    --disable-lzmadec
-    --disable-lzmainfo
-    XZ_TOOL_XZ=OFF
-    XZ_TOOL_XZDEC=OFF
-    XZ_TOOL_LZMADEC=OFF
-    XZ_TOOL_LZMAINFO=OFF
-                Don't build and install the command line tool mentioned
-                in the option name.
-
-                NOTE: Disabling xz will skip some tests in "make check".
-
-                NOTE: If xzdec is disabled and lzmadec is left enabled,
-                a dangling man page symlink lzmadec.1 -> xzdec.1 is
-                created.
-
-    XZ_TOOL_SYMLINKS=OFF
-                Don't create the unxz and xzcat symlinks. (There is
-                no "configure" option to disable these symlinks.)
-
-    --disable-lzma-links
-    XZ_TOOL_SYMLINKS_LZMA=OFF
-                Don't create symlinks for LZMA Utils compatibility.
-                This includes lzma, unlzma, and lzcat. If scripts are
-                installed, also lzdiff, lzcmp, lzgrep, lzegrep, lzfgrep,
-                lzmore, and lzless will be omitted if this option is used.
-
-    --disable-scripts
-    XZ_TOOL_SCRIPTS=OFF
-                Don't install the scripts xzdiff, xzgrep, xzmore, xzless,
-                and their symlinks.
-
-    --disable-doc
-    XZ_DOC=OFF
-                Don't install the documentation files to $docdir
-                (often /usr/doc/xz or /usr/local/doc/xz). Man pages
-                will still be installed. The $docdir can be changed
-                with --docdir=DIR.
-
-    --enable-doxygen
-    XZ_DOXYGEN=ON
-                Enable generation of the HTML version of the liblzma API
-                documentation using Doxygen. The resulting files are
-                installed to $docdir/api. This option assumes that
-                the 'doxygen' tool is available.
-
-                NOTE: --disable-doc or XZ_DOC=OFF don't affect this.
-
-    --disable-assembler
-    XZ_ASM_I386=OFF
-                This disables CRC32 and CRC64 assembly code on
-                32-bit x86. This option currently does nothing
-                on other architectures (not even on x86-64).
-
-                The 32-bit x86 assembly is position-independent code
-                which is suitable for use in shared libraries and
-                position-independent executables. It uses only i386
-                instructions but the code is optimized for i686 class
-                CPUs. If you are compiling liblzma exclusively for
-                pre-i686 systems, you may want to disable the assembler
-                code.
-
-                The assembly code is compatible with only certain OSes
-                and toolchains (it's not compatible with MSVC).
-
-                Since XZ Utils 5.7.1alpha, the 32-bit x86 assembly code
-                co-exists with the modern CLMUL code: CLMUL is used if
-                support for it is detected at runtime. On old processors
-                the assembly code is used.
-
-    --disable-clmul-crc
-    XZ_CLMUL_CRC=OFF
-                Disable the use of carryless multiplication for CRC
-                calculation even if compiler support for it is detected.
-                The code uses runtime detection of SSSE3, SSE4.1, and
-                CLMUL instructions on x86. On 32-bit x86 this currently
-                is used only if --disable-assembler is used (this might
-                be fixed in the future). The code works on E2K too.
-
-                If using compiler options that unconditionally allow the
-                required extensions (-msse4.1 -mpclmul) then runtime
-                detection isn't used and the generic code is omitted.
-
-    --disable-arm64-crc32
-    XZ_ARM64_CRC32=OFF
-                Disable the use of the ARM64 CRC32 instruction extension
-                even if compiler support for it is detected. The code will
-                detect support for the instruction at runtime.
-
-                If using compiler options that unconditionally allow the
-                required extensions (-march=armv8-a+crc or -march=armv8.1-a
-                and later) then runtime detection isn't used and the
-                generic code is omitted.
-
-    --disable-loongarch-crc32
-    XZ_LOONGARCH_CRC32=OFF
-                Disable the use of the 64-bit LoongArch CRC32
-                instruction extension even if compiler support for
-                it is detected. There is no runtime detection because
-                all 64-bit LoongArch processors should support
-                the CRC32 instructions.
-
-    --enable-unaligned-access
-    TUKLIB_FAST_UNALIGNED_ACCESS=ON
-                Allow liblzma to use unaligned memory access for 16-bit,
-                32-bit, and 64-bit loads and stores. This should be
-                enabled only when the hardware supports this, that is,
-                when unaligned access is fast. Some operating system
-                kernels emulate unaligned access, which is extremely
-                slow. This option shouldn't be used on systems that
-                rely on such emulation.
-
-                Unaligned access is enabled by default on these:
-                  - 32-bit x86
-                  - 64-bit x86-64
-                  - 32-bit big endian PowerPC
-                  - 64-bit big endian PowerPC
-                  - 64-bit little endian PowerPC
-                  - some RISC-V [1]
-                  - some 32-bit ARM [2]
-                  - some 64-bit ARM64 [2] (NOTE: Autodetection bug
-                    if using GCC -mstrict-align, see below.)
-
-                [1] Unaligned access is enabled by default if
-                    configure sees that the C compiler
-                    #defines __riscv_misaligned_fast.
-
-                [2] Unaligned access is enabled by default if
-                    configure sees that the C compiler
-                    #defines __ARM_FEATURE_UNALIGNED:
-
-                      - ARMv7 + GCC or Clang: It works. The options
-                        -munaligned-access and -mno-unaligned-access
-                        affect this macro correctly.
-
-                      - ARM64 + Clang: It works. The options
-                        -munaligned-access, -mno-unaligned-access,
-                        and -mstrict-align affect this macro correctly.
-                        Clang >= 17 supports -mno-strict-align too.
-
-                      - ARM64 + GCC: It partially works. The macro
-                        is always #defined by GCC versions at least
-                        up to 13.2, even when using -mstrict-align.
-                        If building for strict-align ARM64, the
-                        configure option --disable-unaligned-access
-                        should be used if using a GCC version that has
-                        this issue because otherwise the performance
-                        may be degraded. It likely won't crash due to
-                        how unaligned access is done in the C code.
-
-    --enable-unsafe-type-punning
-    TUKLIB_USE_UNSAFE_TYPE_PUNNING=ON
-                This enables use of code like
-
-                    uint8_t *buf8 = ...;
-                    *(uint32_t *)buf8 = ...;
-
-                which violates strict aliasing rules and may result
-                in broken code. There should be no need to use this
-                option with recent GCC or Clang versions on any
-                arch as just as fast code can be generated in a safe
-                way too (using __builtin_assume_aligned + memcpy).
-
-                However, this option might improve performance in some
-                other cases, especially with old compilers (for example,
-                GCC 3 and early 4.x on x86, GCC < 6 on ARMv6 and ARMv7).
-
-    --enable-small
-    XZ_SMALL=ON
-                Reduce the size of liblzma by selecting smaller but
-                semantically equivalent version of some functions, and
-                omit precomputed lookup tables. This option tends to
-                make liblzma slightly slower.
-
-                Note that while omitting the precomputed tables makes
-                liblzma smaller on disk, the tables are still needed at
-                run time, and need to be computed at startup. This also
-                means that the RAM holding the tables won't be shared
-                between applications linked against shared liblzma.
-
-                This option doesn't modify CFLAGS to tell the compiler
-                to optimize for size. You need to add -Os or equivalent
-                flag(s) to CFLAGS manually.
-
-    --enable-assume-ram=SIZE
-    XZ_ASSUME_RAM=SIZE
-                On the most common operating systems, XZ Utils is able to
-                detect the amount of physical memory on the system. This
-                information is used by the options --memlimit-compress,
-                --memlimit-decompress, and --memlimit when setting the
-                limit to a percentage of total RAM.
-
-                On some systems, there is no code to detect the amount of
-                RAM though. Using --enable-assume-ram one can set how much
-                memory to assume on these systems. SIZE is given as MiB.
-                The default is 128 MiB.
-
-                Feel free to send patches to add support for detecting
-                the amount of RAM on the operating system you use. See
-                src/common/tuklib_physmem.c for details.
-
-    --enable-threads=METHOD
-    XZ_THREADS=METHOD
-                Threading support is enabled by default so normally there
-                is no need to specify this option.
-
-                Supported values for METHOD:
-
-                        yes     Autodetect the threading method. If none
-                                is found, configure will give an error.
-
-                        posix   Use POSIX pthreads. This is the default
-                                except on Windows outside Cygwin.
-
-                        win95   Use Windows 95 compatible threads. This
-                                is compatible with Windows XP and later
-                                too. This is the default for 32-bit x86
-                                Windows builds. Unless the compiler
-                                supports __attribute__((__constructor__)),
-                                the 'win95' threading is incompatible with
-                                --enable-small.
-
-                        vista   Use Windows Vista compatible threads. The
-                                resulting binaries won't run on Windows XP
-                                or older. This is the default for Windows
-                                excluding 32-bit x86 builds (that is, on
-                                x86-64 the default is 'vista').
-
-                        no      Disable threading support. This is the
-                                same as using --disable-threads.
-                                NOTE: If combined with --enable-small
-                                and the compiler doesn't support
-                                __attribute__((__constructor__)), the
-                                resulting liblzma won't be thread safe,
-                                that is, if a multi-threaded application
-                                calls any liblzma functions from more than
-                                one thread, something bad may happen.
-
-    --enable-sandbox=METHOD
-    XZ_SANDBOX=METHOD
-                There is limited sandboxing support in the xz and xzdec
-                tools. If built with sandbox support, xz uses it
-                automatically when (de)compressing exactly one file to
-                standard output when the options --files or --files0 aren't
-                used. This is a common use case, for example,
-                (de)compressing .tar.xz files via GNU tar. The sandbox is
-                also used for single-file 'xz --test' or 'xz --list'.
-                xzdec always uses the sandbox, except when more than one
-                file are decompressed. In this case it will enable the
-                sandbox for the last file that is decompressed.
-
-                Supported METHODs:
-
-                        auto    Look for a supported sandboxing method
-                                and use it if found. If no method is
-                                found, then sandboxing isn't used.
-                                This is the default.
-
-                        no      Disable sandboxing support.
-
-                        capsicum
-                                Use Capsicum (FreeBSD >= 10.2) for
-                                sandboxing. If no Capsicum support
-                                is found, configure will give an error.
-
-                        pledge  Use pledge(2) (OpenBSD >= 5.9) for
-                                sandboxing. If pledge(2) isn't found,
-                                configure will give an error.
-
-                        landlock
-                                Use Landlock (Linux >= 5.13) for
-                                sandboxing. If no Landlock support
-                                is found, configure will give an error.
-
-    --enable-symbol-versions[=VARIANT]
-    XZ_SYMBOL_VERSIONING=VARIANT
-                Use symbol versioning for liblzma shared library.
-                This is enabled by default on GNU/Linux (glibc only),
-                other GNU-based systems, and FreeBSD.
-
-                Symbol versioning is never used for static liblzma. This
-                option is ignored when not building a shared library.
-
-                Supported VARIANTs:
-
-                        no      Disable symbol versioning. This is the
-                                same as using --disable-symbol-versions.
-
-                        auto    Autodetect between "no", "linux",
-                                and "generic".
-
-                        yes     Autodetect between "linux" and
-                                "generic". This forces symbol
-                                versioning to be used when
-                                building a shared library.
-
-                        generic Generic version is the default for
-                                FreeBSD and GNU/Linux on MicroBlaze.
-
-                                This is also used on GNU/Linux when
-                                building with NVIDIA HPC Compiler
-                                because the compiler doesn't support
-                                the features required for the "linux"
-                                variant below.
-
-                        linux   Special version for GNU/Linux (glibc
-                                only). This adds a few extra symbol
-                                versions for compatibility with binaries
-                                that have been linked against a liblzma
-                                version that has been patched with
-                                "xz-5.2.2-compat-libs.patch" from
-                                RHEL/CentOS 7. That patch was used
-                                by some build tools outside of
-                                RHEL/CentOS 7 too.
-
-    --enable-debug
-                This enables the assert() macro and possibly some other
-                run-time consistency checks. It makes the code slower, so
-                you normally don't want to have this enabled.
-
-                In CMake, the build type (CMAKE_BUILD_TYPE) controls if
-                -DNDEBUG is passed to the compiler. *In this package*,
-                an empty build type disables debugging code too.
-                Non-standard build types like "None" do NOT disable
-                debugging code!
-
-                To enable debugging code with empty build type in CMake,
-                use -UNDEBUG in the CFLAGS environment variable or in
-                the CMAKE_C_FLAGS CMake variable to override -DNDEBUG.
-
-    --enable-werror
-    CMAKE_COMPILE_WARNING_AS_ERROR=ON (CMake >= 3.24)
-                If building with GCC, make all compiler warnings an error,
-                that abort the compilation. This may help catching bugs,
-                and should work on most systems. This has no effect on the
-                resulting binaries.
-
-    --enable-path-for-scripts=PREFIX
-    (CMake determines this from the path of XZ_POSIX_SHELL)
-                If PREFIX isn't empty, PATH=PREFIX:$PATH will be set in
-                the beginning of the scripts (xzgrep and others).
-                The default is empty except on Solaris the default is
-                /usr/xpg4/bin.
-
-                This can be useful if the default PATH doesn't contain
-                modern POSIX tools (as can be the case on Solaris) or if
-                one wants to ensure that the correct xz binary is in the
-                PATH for the scripts. Note that the latter use can break
-                "make check" if the prefixed PATH causes a wrong xz binary
-                (other than the one that was just built) to be used.
-
-                Older xz releases support a different method for setting
-                the PATH for the scripts. It is described in section 3.2
-                and is supported in this xz version too.
-
-    gl_cv_posix_shell=/path/to/bin/sh
-    XZ_POSIX_SHELL=/path/to/bin/sh
-                POSIX shell to use for xzgrep and other scripts.
-
-                  - configure should autodetect this well enough.
-                    Typically it's /bin/sh but in some cases, like
-                    Solaris, something else is used.
-
-                  - CMake build uses /bin/sh except on Solaris the
-                    default is /usr/xpg4/bin/sh.
-
-    CMAKE_DLL_NAME_WITH_SOVERSION=ON
-                CMake on native Windows (not Cygwin) only:
-
-                This changes the filename liblzma.dll to liblzma-5.dll.
-
-                The unversioned filename liblzma.dll has been used
-                since XZ Utils 5.0.0 when creating binary packages
-                using the included windows/build.bash. The same
-                unversioned filename is the default with CMake.
-                However, there are popular builds that, very
-                understandably and reasonably, use the versioned
-                filename produced by GNU Libtool.
-
-                This option should usually be left to its default value
-                (OFF). It can be set to ON if the liblzma DLL filename
-                must be compatible with the versioned filename
-                produced by GNU Libtool. For example, binaries
-                distributed in MSYS2 use a versioned DLL filename.
-
-
-2.1. Static vs. dynamic linking of liblzma
-
-    On 32-bit x86, linking against static liblzma can give a minor
-    speed improvement. Static libraries on x86 are usually compiled as
-    position-dependent code (non-PIC) and shared libraries are built as
-    position-independent code (PIC). PIC wastes one register, which can
-    make the code slightly slower compared to a non-PIC version. (Note
-    that this doesn't apply to x86-64.)
-
-    If you want to link xz against static liblzma, the simplest way
-    is to pass --disable-shared to configure. If you want also shared
-    liblzma, run configure again and run "make install" only for
-    src/liblzma.
-
-
-2.2. Optimizing xzdec and lzmadec
-
-    xzdec and lzmadec are intended to be relatively small instead of
-    optimizing for the best speed. Thus, it is a good idea to build
-    xzdec and lzmadec separately:
-
-      - To link the tools against static liblzma, pass --disable-shared
-        to configure.
-
-      - To select somewhat size-optimized variant of some things in
-        liblzma, pass --enable-small to configure.
-
-      - Tell the compiler to optimize for size instead of speed.
-        For example, with GCC, put -Os into CFLAGS.
-
-      - xzdec and lzmadec will never use multithreading capabilities of
-        liblzma. You can avoid dependency on libpthread by passing
-        --disable-threads to configure.
-
-      - There are and will be no translated messages for xzdec and
-        lzmadec, so it is fine to pass also --disable-nls to configure.
-
-      - Only decoder code is needed, so you can speed up the build
-        slightly by passing --disable-encoders to configure. This
-        shouldn't affect the final size of the executables though,
-        because the linker is able to omit the encoder code anyway.
-
-    If you have no use for xzdec or lzmadec, you can disable them with
-    --disable-xzdec and --disable-lzmadec.
-
-
-3. xzgrep and other scripts
----------------------------
-
-3.1. Dependencies
-
-    POSIX shell (sh) and bunch of other standard POSIX tools are required
-    to run the scripts. The configure script tries to find a POSIX
-    compliant sh, but if it fails, you can force the shell by passing
-    gl_cv_posix_shell=/path/to/posix-sh as an argument to the configure
-    script.
-
-    xzdiff (xzcmp/lzdiff/lzcmp) may use mktemp if it is available. As
-    a fallback xzdiff will use mkdir to securely create a temporary
-    directory. Having mktemp available is still recommended since the
-    mkdir fallback method isn't as robust as mktemp is. The original
-    mktemp can be found from <https://www.mktemp.org/>. On GNU, most will
-    use the mktemp program from GNU coreutils instead of the original
-    implementation. Both mktemp versions are fine.
-
-    In addition to using xz to decompress .xz files, xzgrep and xzdiff
-    use gzip, bzip2, and lzop to support .gz, bz2, and .lzo files.
-
-
-3.2. PATH
-
-    The method described below is supported by older xz releases.
-    It is supported by the current version too, but the newer
-    --enable-path-for-scripts=PREFIX described in section 2 may be
-    more convenient.
-
-    The scripts assume that the required tools (standard POSIX utilities,
-    mktemp, and xz) are in PATH; the scripts don't set the PATH themselves
-    (except as described for --enable-path-for-scripts=PREFIX). Some
-    people like this while some think this is a bug. Those in the latter
-    group can easily patch the scripts before running the configure script
-    by taking advantage of a placeholder line in the scripts.
-
-    For example, to make the scripts prefix /usr/bin:/bin to PATH:
-
-        perl -pi -e 's|^#SET_PATH.*$|PATH=/usr/bin:/bin:\$PATH|' \
-                src/scripts/xz*.in
-
-
-4. Tests
---------
-
-    The test framework can be built and run by executing "make check" in
-    the build directory. The tests are a mix of executables and POSIX
-    shell scripts (sh). All tests should pass if the default configuration
-    is used. Disabling features through the configure options may cause
-    some tests to be skipped. If any tests do not pass, see section 5.5.
-
-
-4.1. Testing in parallel
-
-    The tests can be run in parallel using the "-j" make option on systems
-    that support it. For instance, "make -j4 check" will run up to four
-    tests simultaneously.
-
-
-4.2. Cross compiling
-
-    The tests can be built without running them:
-
-        make check TESTS=
-
-    The TESTS variable is the list of tests you wish to run. Leaving it
-    empty will compile the tests without running any.
-
-    If the tests are copied to a target machine to execute, the test data
-    files in the directory tests/files must also be copied. The tests
-    search for the data files using the environment variable $srcdir,
-    expecting to find the data files under $srcdir/files/. If $srcdir
-    isn't set then it defaults to the current directory.
-
-    The shell script tests can be copied from the source directory to the
-    target machine to execute. In addition to the test files, these tests
-    will expect the following relative file paths to execute properly:
-
-        ./create_compress_files
-        ../config.h
-        ../src/xz/xz
-        ../src/xzdec/xzdec
-        ../src/scripts/xzdiff
-        ../src/scripts/xzgrep
-
-
-5. Troubleshooting
-------------------
-
-5.1. "No C99 compiler was found."
-
-    You need a C99 compiler to build XZ Utils. If the configure script
-    cannot find a C99 compiler and you think you have such a compiler
-    installed, set the compiler command by passing CC=/path/to/c99 as
-    an argument to the configure script.
-
-    If you get this error even when you think your compiler supports C99,
-    you can override the test by passing ac_cv_prog_cc_c99= as an argument
-    to the configure script. The test for C99 compiler is not perfect (and
-    it is not as easy to make it perfect as it sounds), so sometimes this
-    may be needed. You will get a compile error if your compiler doesn't
-    support enough C99.
-
-
-5.2. "No POSIX conforming shell (sh) was found."
-
-    xzgrep and other scripts need a shell that (roughly) conforms
-    to POSIX. The configure script tries to find such a shell. If
-    it fails, you can force the shell to be used by passing
-    gl_cv_posix_shell=/path/to/posix-sh as an argument to the configure
-    script. Alternatively you can omit the installation of scripts and
-    this error by passing --disable-scripts to configure.
-
-
-5.3. configure works but build fails at crc32_x86.S
-
-    The easy fix is to pass --disable-assembler to the configure script.
-
-    The configure script determines if assembler code can be used by
-    looking at the configure triplet; there is currently no check if
-    the assembler code can actually be built. The x86 assembler
-    code should work on x86 GNU/Linux, *BSDs, Solaris, Darwin, MinGW,
-    Cygwin, and DJGPP. On other x86 systems, there may be problems and
-    the assembler code may need to be disabled with the configure option.
-
-    If you get this error when building for x86-64, you have specified or
-    the configure script has misguessed your architecture. Pass the
-    correct configure triplet using the --build=CPU-COMPANY-SYSTEM option
-    (see INSTALL.generic).
-
-
-5.4. Lots of warnings about symbol visibility
-
-    On some systems where symbol visibility isn't supported, GCC may
-    still accept the visibility options and attributes, which will make
-    configure think that visibility is supported. This will result in
-    many compiler warnings. You can avoid the warnings by forcing the
-    visibility support off by passing gl_cv_cc_visibility=no as an
-    argument to the configure script. This has no effect on the
-    resulting binaries, but fewer warnings looks nicer and may allow
-    using --enable-werror.
-
-
-5.5. "make check" fails
-
-    If the other tests pass but test_scripts.sh fails, then the problem
-    is in the scripts in src/scripts. Comparing the contents of
-    tests/xzgrep_test_output to tests/xzgrep_expected_output might
-    give a good idea about problems in xzgrep. One possibility is that
-    some tools are missing from the current PATH or the tools lack
-    support for some POSIX features. This can happen at least on
-    Solaris where the tools in /bin may be ancient but good enough
-    tools are available in /usr/xpg4/bin or /usr/xpg6/bin. For possible
-    fixes, see --enable-path-for-scripts=PREFIX in section 2 and the
-    older alternative method described in section 3.2 of this file.
-
-    If tests other than test_scripts.sh fail, a likely reason is that
-    libtool links the test programs against an installed version of
-    liblzma instead of the version that was just built. This is
-    obviously a bug which seems to happen on some platforms.
-    A workaround is to uninstall the old liblzma versions first.
-
-    If the problem isn't any of those described above, then it's likely
-    a bug in XZ Utils or in the compiler. See the platform-specific
-    notes in this file for possible known problems. Please report
-    a bug if you cannot solve the problem. See README for contact
-    information.
-
-
-5.6. liblzma.so (or similar) not found when running xz
-
-    If you installed the package with "make install" and get an error
-    about liblzma.so (or a similarly named file) being missing, try
-    running "ldconfig" to update the run-time linker cache (if your
-    operating system has such a command).
-

INSTALL.generic

@@ -1,368 +0,0 @@
-Installation Instructions
-*************************
-
-   Copyright (C) 1994-1996, 1999-2002, 2004-2016 Free Software
-Foundation, Inc.
-
-   Copying and distribution of this file, with or without modification,
-are permitted in any medium without royalty provided the copyright
-notice and this notice are preserved.  This file is offered as-is,
-without warranty of any kind.
-
-Basic Installation
-==================
-
-   Briefly, the shell command './configure && make && make install'
-should configure, build, and install this package.  The following
-more-detailed instructions are generic; see the 'README' file for
-instructions specific to this package.  Some packages provide this
-'INSTALL' file but do not implement all of the features documented
-below.  The lack of an optional feature in a given package is not
-necessarily a bug.  More recommendations for GNU packages can be found
-in *note Makefile Conventions: (standards)Makefile Conventions.
-
-   The 'configure' shell script attempts to guess correct values for
-various system-dependent variables used during compilation.  It uses
-those values to create a 'Makefile' in each directory of the package.
-It may also create one or more '.h' files containing system-dependent
-definitions.  Finally, it creates a shell script 'config.status' that
-you can run in the future to recreate the current configuration, and a
-file 'config.log' containing compiler output (useful mainly for
-debugging 'configure').
-
-   It can also use an optional file (typically called 'config.cache' and
-enabled with '--cache-file=config.cache' or simply '-C') that saves the
-results of its tests to speed up reconfiguring.  Caching is disabled by
-default to prevent problems with accidental use of stale cache files.
-
-   If you need to do unusual things to compile the package, please try
-to figure out how 'configure' could check whether to do them, and mail
-diffs or instructions to the address given in the 'README' so they can
-be considered for the next release.  If you are using the cache, and at
-some point 'config.cache' contains results you don't want to keep, you
-may remove or edit it.
-
-   The file 'configure.ac' (or 'configure.in') is used to create
-'configure' by a program called 'autoconf'.  You need 'configure.ac' if
-you want to change it or regenerate 'configure' using a newer version of
-'autoconf'.
-
-   The simplest way to compile this package is:
-
-  1. 'cd' to the directory containing the package's source code and type
-     './configure' to configure the package for your system.
-
-     Running 'configure' might take a while.  While running, it prints
-     some messages telling which features it is checking for.
-
-  2. Type 'make' to compile the package.
-
-  3. Optionally, type 'make check' to run any self-tests that come with
-     the package, generally using the just-built uninstalled binaries.
-
-  4. Type 'make install' to install the programs and any data files and
-     documentation.  When installing into a prefix owned by root, it is
-     recommended that the package be configured and built as a regular
-     user, and only the 'make install' phase executed with root
-     privileges.
-
-  5. Optionally, type 'make installcheck' to repeat any self-tests, but
-     this time using the binaries in their final installed location.
-     This target does not install anything.  Running this target as a
-     regular user, particularly if the prior 'make install' required
-     root privileges, verifies that the installation completed
-     correctly.
-
-  6. You can remove the program binaries and object files from the
-     source code directory by typing 'make clean'.  To also remove the
-     files that 'configure' created (so you can compile the package for
-     a different kind of computer), type 'make distclean'.  There is
-     also a 'make maintainer-clean' target, but that is intended mainly
-     for the package's developers.  If you use it, you may have to get
-     all sorts of other programs in order to regenerate files that came
-     with the distribution.
-
-  7. Often, you can also type 'make uninstall' to remove the installed
-     files again.  In practice, not all packages have tested that
-     uninstallation works correctly, even though it is required by the
-     GNU Coding Standards.
-
-  8. Some packages, particularly those that use Automake, provide 'make
-     distcheck', which can by used by developers to test that all other
-     targets like 'make install' and 'make uninstall' work correctly.
-     This target is generally not run by end users.
-
-Compilers and Options
-=====================
-
-   Some systems require unusual options for compilation or linking that
-the 'configure' script does not know about.  Run './configure --help'
-for details on some of the pertinent environment variables.
-
-   You can give 'configure' initial values for configuration parameters
-by setting variables in the command line or in the environment.  Here is
-an example:
-
-     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
-
-   *Note Defining Variables::, for more details.
-
-Compiling For Multiple Architectures
-====================================
-
-   You can compile the package for more than one kind of computer at the
-same time, by placing the object files for each architecture in their
-own directory.  To do this, you can use GNU 'make'.  'cd' to the
-directory where you want the object files and executables to go and run
-the 'configure' script.  'configure' automatically checks for the source
-code in the directory that 'configure' is in and in '..'.  This is known
-as a "VPATH" build.
-
-   With a non-GNU 'make', it is safer to compile the package for one
-architecture at a time in the source code directory.  After you have
-installed the package for one architecture, use 'make distclean' before
-reconfiguring for another architecture.
-
-   On MacOS X 10.5 and later systems, you can create libraries and
-executables that work on multiple system types--known as "fat" or
-"universal" binaries--by specifying multiple '-arch' options to the
-compiler but only a single '-arch' option to the preprocessor.  Like
-this:
-
-     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
-                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
-                 CPP="gcc -E" CXXCPP="g++ -E"
-
-   This is not guaranteed to produce working output in all cases, you
-may have to build one architecture at a time and combine the results
-using the 'lipo' tool if you have problems.
-
-Installation Names
-==================
-
-   By default, 'make install' installs the package's commands under
-'/usr/local/bin', include files under '/usr/local/include', etc.  You
-can specify an installation prefix other than '/usr/local' by giving
-'configure' the option '--prefix=PREFIX', where PREFIX must be an
-absolute file name.
-
-   You can specify separate installation prefixes for
-architecture-specific files and architecture-independent files.  If you
-pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
-PREFIX as the prefix for installing programs and libraries.
-Documentation and other data files still use the regular prefix.
-
-   In addition, if you use an unusual directory layout you can give
-options like '--bindir=DIR' to specify different values for particular
-kinds of files.  Run 'configure --help' for a list of the directories
-you can set and what kinds of files go in them.  In general, the default
-for these options is expressed in terms of '${prefix}', so that
-specifying just '--prefix' will affect all of the other directory
-specifications that were not explicitly provided.
-
-   The most portable way to affect installation locations is to pass the
-correct locations to 'configure'; however, many packages provide one or
-both of the following shortcuts of passing variable assignments to the
-'make install' command line to change installation locations without
-having to reconfigure or recompile.
-
-   The first method involves providing an override variable for each
-affected directory.  For example, 'make install
-prefix=/alternate/directory' will choose an alternate location for all
-directory configuration variables that were expressed in terms of
-'${prefix}'.  Any directories that were specified during 'configure',
-but not in terms of '${prefix}', must each be overridden at install time
-for the entire installation to be relocated.  The approach of makefile
-variable overrides for each directory variable is required by the GNU
-Coding Standards, and ideally causes no recompilation.  However, some
-platforms have known limitations with the semantics of shared libraries
-that end up requiring recompilation when using this method, particularly
-noticeable in packages that use GNU Libtool.
-
-   The second method involves providing the 'DESTDIR' variable.  For
-example, 'make install DESTDIR=/alternate/directory' will prepend
-'/alternate/directory' before all installation names.  The approach of
-'DESTDIR' overrides is not required by the GNU Coding Standards, and
-does not work on platforms that have drive letters.  On the other hand,
-it does better at avoiding recompilation issues, and works well even
-when some directory options were not specified in terms of '${prefix}'
-at 'configure' time.
-
-Optional Features
-=================
-
-   If the package supports it, you can cause programs to be installed
-with an extra prefix or suffix on their names by giving 'configure' the
-option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
-
-   Some packages pay attention to '--enable-FEATURE' options to
-'configure', where FEATURE indicates an optional part of the package.
-They may also pay attention to '--with-PACKAGE' options, where PACKAGE
-is something like 'gnu-as' or 'x' (for the X Window System).  The
-'README' should mention any '--enable-' and '--with-' options that the
-package recognizes.
-
-   For packages that use the X Window System, 'configure' can usually
-find the X include and library files automatically, but if it doesn't,
-you can use the 'configure' options '--x-includes=DIR' and
-'--x-libraries=DIR' to specify their locations.
-
-   Some packages offer the ability to configure how verbose the
-execution of 'make' will be.  For these packages, running './configure
---enable-silent-rules' sets the default to minimal output, which can be
-overridden with 'make V=1'; while running './configure
---disable-silent-rules' sets the default to verbose, which can be
-overridden with 'make V=0'.
-
-Particular systems
-==================
-
-   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU CC
-is not installed, it is recommended to use the following options in
-order to use an ANSI C compiler:
-
-     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
-
-and if that doesn't work, install pre-built binaries of GCC for HP-UX.
-
-   HP-UX 'make' updates targets which have the same time stamps as their
-prerequisites, which makes it generally unusable when shipped generated
-files such as 'configure' are involved.  Use GNU 'make' instead.
-
-   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
-parse its '<wchar.h>' header file.  The option '-nodtk' can be used as a
-workaround.  If GNU CC is not installed, it is therefore recommended to
-try
-
-     ./configure CC="cc"
-
-and if that doesn't work, try
-
-     ./configure CC="cc -nodtk"
-
-   On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
-directory contains several dysfunctional programs; working variants of
-these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
-in your 'PATH', put it _after_ '/usr/bin'.
-
-   On Haiku, software installed for all users goes in '/boot/common',
-not '/usr/local'.  It is recommended to use the following options:
-
-     ./configure --prefix=/boot/common
-
-Specifying the System Type
-==========================
-
-   There may be some features 'configure' cannot figure out
-automatically, but needs to determine by the type of machine the package
-will run on.  Usually, assuming the package is built to be run on the
-_same_ architectures, 'configure' can figure that out, but if it prints
-a message saying it cannot guess the machine type, give it the
-'--build=TYPE' option.  TYPE can either be a short name for the system
-type, such as 'sun4', or a canonical name which has the form:
-
-     CPU-COMPANY-SYSTEM
-
-where SYSTEM can have one of these forms:
-
-     OS
-     KERNEL-OS
-
-   See the file 'config.sub' for the possible values of each field.  If
-'config.sub' isn't included in this package, then this package doesn't
-need to know the machine type.
-
-   If you are _building_ compiler tools for cross-compiling, you should
-use the option '--target=TYPE' to select the type of system they will
-produce code for.
-
-   If you want to _use_ a cross compiler, that generates code for a
-platform different from the build platform, you should specify the
-"host" platform (i.e., that on which the generated programs will
-eventually be run) with '--host=TYPE'.
-
-Sharing Defaults
-================
-
-   If you want to set default values for 'configure' scripts to share,
-you can create a site shell script called 'config.site' that gives
-default values for variables like 'CC', 'cache_file', and 'prefix'.
-'configure' looks for 'PREFIX/share/config.site' if it exists, then
-'PREFIX/etc/config.site' if it exists.  Or, you can set the
-'CONFIG_SITE' environment variable to the location of the site script.
-A warning: not all 'configure' scripts look for a site script.
-
-Defining Variables
-==================
-
-   Variables not defined in a site shell script can be set in the
-environment passed to 'configure'.  However, some packages may run
-configure again during the build, and the customized values of these
-variables may be lost.  In order to avoid this problem, you should set
-them in the 'configure' command line, using 'VAR=value'.  For example:
-
-     ./configure CC=/usr/local2/bin/gcc
-
-causes the specified 'gcc' to be used as the C compiler (unless it is
-overridden in the site shell script).
-
-Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
-Autoconf limitation.  Until the limitation is lifted, you can use this
-workaround:
-
-     CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
-
-'configure' Invocation
-======================
-
-   'configure' recognizes the following options to control how it
-operates.
-
-'--help'
-'-h'
-     Print a summary of all of the options to 'configure', and exit.
-
-'--help=short'
-'--help=recursive'
-     Print a summary of the options unique to this package's
-     'configure', and exit.  The 'short' variant lists options used only
-     in the top level, while the 'recursive' variant lists options also
-     present in any nested packages.
-
-'--version'
-'-V'
-     Print the version of Autoconf used to generate the 'configure'
-     script, and exit.
-
-'--cache-file=FILE'
-     Enable the cache: use and save the results of the tests in FILE,
-     traditionally 'config.cache'.  FILE defaults to '/dev/null' to
-     disable caching.
-
-'--config-cache'
-'-C'
-     Alias for '--cache-file=config.cache'.
-
-'--quiet'
-'--silent'
-'-q'
-     Do not print messages saying which checks are being made.  To
-     suppress all normal output, redirect it to '/dev/null' (any error
-     messages will still be shown).
-
-'--srcdir=DIR'
-     Look for the package's source code in directory DIR.  Usually
-     'configure' can determine that directory automatically.
-
-'--prefix=DIR'
-     Use DIR as the installation prefix.  *note Installation Names:: for
-     more details, including other options available for fine-tuning the
-     installation locations.
-
-'--no-create'
-'-n'
-     Run the configure checks, but stop before creating any output
-     files.
-
-'configure' also accepts some other, not widely useful, options.  Run
-'configure --help' for more details.

Makefile.am

@@ -1,8 +1,16 @@
-## SPDX-License-Identifier: 0BSD
+##
-## Author: Lasse Collin
+##  Copyright (C) 2007 Lasse Collin
-
+##
-# Use -n to prevent gzip from adding a timestamp to the .gz headers.
+##  This library is free software; you can redistribute it and/or
-GZIP_ENV = -9n
+##  modify it under the terms of the GNU Lesser General Public
+##  License as published by the Free Software Foundation; either
+##  version 2.1 of the License, or (at your option) any later version.
+##
+##  This library is distributed in the hope that it will be useful,
+##  but WITHOUT ANY WARRANTY; without even the implied warranty of
+##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+##  Lesser General Public License for more details.
+##
 
 DIST_SUBDIRS = lib src po tests debug
 SUBDIRS =
@@ -13,111 +21,19 @@ endif
 
 SUBDIRS += src po tests
 
-if COND_DOC
-dist_doc_DATA = \
-	AUTHORS \
-	COPYING \
-	COPYING.0BSD \
-	COPYING.GPLv2 \
-	NEWS \
-	README \
-	THANKS \
-	doc/faq.txt \
-	doc/history.txt \
-	doc/xz-file-format.txt \
-	doc/lzma-file-format.txt
-
-examplesdir = $(docdir)/examples
-dist_examples_DATA = \
-	doc/examples/00_README.txt \
-	doc/examples/01_compress_easy.c \
-	doc/examples/02_decompress.c \
-	doc/examples/03_compress_custom.c \
-	doc/examples/04_compress_easy_mt.c \
-	doc/examples/11_file_info.c \
-	doc/examples/Makefile
-endif
-
 EXTRA_DIST = \
-	cmake \
+	m4 \
-	dos \
+	config.rpath  \
-	doxygen \
+	Doxyfile.in \
 	extra \
-	po4a \
+	doc \
-	windows \
-	CMakeLists.txt \
 	COPYING.GPLv2 \
 	COPYING.GPLv3 \
-	COPYING.LGPLv2.1 \
+	COPYING.LGPLv2.1
-	INSTALL.generic \
-	PACKAGERS \
-	TODO \
-	autogen.sh \
-	build-aux/license-check.sh \
-	build-aux/manconv.sh \
-	build-aux/version.sh \
-	po/xz.pot-header
 
 ACLOCAL_AMFLAGS = -I m4
 
-# List of man pages to convert to plain text in the dist-hook target
-# or to PDF in the pdf-local target.
-manfiles = \
-	src/xz/xz.1 \
-	src/xzdec/xzdec.1 \
-	src/lzmainfo/lzmainfo.1 \
-	src/scripts/xzdiff.1 \
-	src/scripts/xzgrep.1 \
-	src/scripts/xzless.1 \
-	src/scripts/xzmore.1
-
-# Create ChangeLog using "git log".
-# Convert the man pages to plain text (ASCII only) format.
-dist-hook:
-	if test -d "$(srcdir)/.git" && type git > /dev/null 2>&1; then \
-		( cd "$(srcdir)" && git log --pretty=medium --date=iso --stat \
-			b69da6d4bb6bb11fc0cf066920791990d2b22a06^..HEAD ) \
-			> "$(distdir)/ChangeLog"; \
-	fi
-	if type groff > /dev/null 2>&1; then \
-		dest="$(distdir)/doc/man" && \
-		$(MKDIR_P) "$$dest/txt" && \
-		for FILE in $(manfiles); do \
-			BASE=`basename $$FILE .1` && \
-			$(SHELL) "$(srcdir)/build-aux/manconv.sh" ascii \
-				< "$(srcdir)/$$FILE" \
-				> "$$dest/txt/$$BASE.txt"; \
-		done; \
-	fi
-	cd "$(distdir)" && $(SHELL) "build-aux/license-check.sh"
-
 # This works with GNU tar and gives cleaner package than normal 'make dist'.
-# This also ensures that the translations are up to date (dist-hook
-# would be too late for that).
 mydist:
-	$(SHELL) "$(srcdir)/src/liblzma/validate_map.sh"
+	TAR_OPTIONS='--owner=0 --group=0 --numeric-owner --mode=u+rw,go+r-w' \
-	cd po && $(MAKE) xz.pot-update
+		$(MAKE) dist-gzip
-	cd "$(srcdir)/po4a" && $(SHELL) update-po
-	VERSION=$(VERSION); \
-	if test -d "$(srcdir)/.git" && type git > /dev/null 2>&1; then \
-		$(SHELL) "$(srcdir)/build-aux/license-check.sh" || exit 1; \
-		SNAPSHOT=`cd "$(srcdir)" && git describe --abbrev=8 | cut -b2-`; \
-		test -n "$$SNAPSHOT" && VERSION=$$SNAPSHOT; \
-	fi; \
-	TAR_OPTIONS='--owner=0 --group=0 --numeric-owner --mode=u+rw,go+r-w --sort=name' \
-		LC_COLLATE=C \
-		$(MAKE) VERSION="$$VERSION" dist-gzip
-
-# NOTE: This only creates the PDFs. The install rules are missing.
-pdf-local:
-	dest="doc/man" && \
-	$(MKDIR_P) "$$dest/pdf-a4" "$$dest/pdf-letter" && \
-	for FILE in $(manfiles); do \
-		BASE=`basename $$FILE .1` && \
-		$(SHELL) "$(srcdir)/build-aux/manconv.sh" pdf a4 \
-			< "$(srcdir)/$$FILE" \
-			> "$$dest/pdf-a4/$$BASE-a4.pdf" && \
-		$(SHELL) "$(srcdir)/build-aux/manconv.sh" pdf letter \
-			< "$(srcdir)/$$FILE" \
-			> "$$dest/pdf-letter/$$BASE-letter.pdf"; \
-	done

PACKAGERS

@@ -1,245 +0,0 @@
-
-Information to packagers of XZ Utils
-====================================
-
-    0. Preface
-    1. Package naming
-    2. Package description
-    3. License
-    4. configure options
-    5. Additional documentation
-    6. Extra files
-    7. Installing XZ Utils and LZMA Utils in parallel
-    8. Example
-
-
-0. Preface
-----------
-
-    This document is meant for people who create and maintain XZ Utils
-    packages for operating system distributions. The focus is on GNU/Linux
-    systems, but most things apply to other systems too.
-
-    While the standard "configure && make DESTDIR=$PKG install" should
-    give a pretty good package, there are some details which packagers
-    may want to tweak.
-
-    Packagers should also read the INSTALL file.
-
-
-1. Package naming
------------------
-
-    The preferred name for the XZ Utils package is "xz", because that's
-    the name of the upstream tarball. Naturally you may have good reasons
-    to use some other name; I won't get angry about it. ;-) It's just nice
-    to be able to point people to the correct package name without asking
-    what distro they have.
-
-    If your distro policy is to split things into small pieces, here is
-    one suggestion:
-
-        xz              xz, xzdec, scripts (xzdiff, xzgrep, etc.), docs
-        xz-lzma         lzma, unlzma, lzcat, lzgrep etc. symlinks and
-                        lzmadec binary for compatibility with LZMA Utils
-        liblzma         liblzma.so.*
-        liblzma-devel   liblzma.so, liblzma.a, API headers
-        liblzma-doc     Example programs and, if enabled at build time,
-                        Doxygen-generated liblzma API docs (HTML)
-
-
-2. Package description
-----------------------
-
-    Here is a suggestion which you may use as the package description.
-    If you can use only one-line description, pick only the first line.
-    Naturally, feel free to use some other description if you find it
-    better, and maybe send it to me too.
-
-        Library and command line tools for XZ and LZMA compressed files
-
-        XZ Utils provide a general purpose data compression library
-        and command line tools. The native file format is the .xz
-        format, but also the legacy .lzma format is supported. The .xz
-        format supports multiple compression algorithms, of which LZMA2
-        is currently the primary algorithm. With typical files, XZ Utils
-        create about 30 % smaller files than gzip.
-
-    If you are splitting XZ Utils into multiple packages, here are some
-    suggestions for package descriptions:
-
-    xz:
-
-        Command line tools for XZ and LZMA compressed files
-
-        This package includes the xz compression tool and other command
-        line tools from XZ Utils. xz has command line syntax similar to
-        that of gzip. The native file format is the .xz format, but also
-        the legacy .lzma format is supported. The .xz format supports
-        multiple compression algorithms, of which LZMA2 is currently the
-        primary algorithm. With typical files, XZ Utils create about 30 %
-        smaller files than gzip.
-
-        Note that this package doesn't include the files needed for
-        LZMA Utils 4.32.x compatibility. Install also the xz-lzma
-        package to make XZ Utils emulate LZMA Utils 4.32.x.
-
-    xz-lzma:
-
-        LZMA Utils emulation with XZ Utils
-
-        This package includes executables and symlinks to make
-        XZ Utils emulate lzma, unlzma, lzcat, and other command
-        line tools found from the legacy LZMA Utils 4.32.x package.
-
-    liblzma:
-
-        Library for XZ and LZMA compressed files
-
-        liblzma is a general purpose data compression library with
-        an API similar to that of zlib. liblzma supports multiple
-        algorithms, of which LZMA2 is currently the primary algorithm.
-        The native file format is .xz, but also the legacy .lzma
-        format and raw streams (no headers at all) are supported.
-
-        This package includes the shared library.
-
-    liblzma-devel:
-
-        Library for XZ and LZMA compressed files
-
-        This package includes the API headers, static library, and
-        other development files related to liblzma.
-
-    liblzma-doc:
-
-        liblzma API documentation in HTML and example usage
-
-        This package includes the Doxygen-generated liblzma API
-        HTML docs and example programs showing how to use liblzma.
-
-
-3. License
-----------
-
-    If the package manager supports a license field, you probably should
-    put GPLv2+ there (GNU GPL v2 or later). The interesting parts of
-    XZ Utils are under the BSD Zero Clause License (0BSD), but some less
-    important files ending up into the binary package are under GPLv2+.
-    So it is simplest to just say GPLv2+ if you cannot specify
-    "BSD0 and GPLv2+".
-
-    If you split XZ Utils into multiple packages as described earlier
-    in this file, liblzma and liblzma-dev packages will contain only
-    0BSD-licensed code from XZ Utils (compiler or linker may add some
-    third-party code which may have other licenses).
-
-
-4. configure options
---------------------
-
-    Unless you are building a package for a distribution that is meant
-    only for embedded systems, don't use the following configure options:
-
-        --enable-debug
-        --enable-encoders (*)
-        --enable-decoders
-        --enable-match-finders
-        --enable-checks
-        --enable-small (*)
-        --disable-threads (*)
-        --disable-microlzma (*)
-        --disable-lzip-decoder (*)
-
-    (*) These are OK when building xzdec and lzmadec as described
-        in INSTALL.
-
-    xzdec and lzmadec don't provide any functionality that isn't already
-    available in the xz tool. Shipping xzdec and lzmadec without size
-    optimization and statically-linked liblzma isn't very useful. Doing
-    that would give users the xzdec man page, which may make it easier
-    for people to find out that such tools exists, but the executables
-    wouldn't have any advantage over the full-featured xz.
-
-
-5. Additional documentation
----------------------------
-
-    "make install" copies some additional documentation to $docdir
-    (--docdir in configure). There is a copy of the GNU GPL v2, which
-    can be replaced with a symlink if your distro ships with shared
-    copies of the common license texts.
-
-    The Doxygen-generated liblzma API documentation (HTML) is built and
-    installed if the configure option --enable-doxygen is used (it's
-    disabled by default). This requires that Doxygen is available. The
-    API documentation is installed by "make install" to $docdir/api.
-
-        NOTE: The files generated by Doxygen include content from
-        Doxygen itself. Check the license info before distributing
-        the Doxygen-generated files.
-
-
-6. Extra files
---------------
-
-    The "extra" directory contains some small extra tools or other files.
-    The exact set of extra files can vary between XZ Utils releases. The
-    extra files have only limited use or they are too dangerous to be
-    put directly to $bindir (7z2lzma.sh is a good example, since it can
-    silently create corrupt output if certain conditions are not met).
-
-    If you feel like it, you may copy the extra directory under the doc
-    directory (e.g. /usr/share/doc/xz/extra). Maybe some people will find
-    them useful. However, most people needing these tools probably are
-    able to find them from the source package too.
-
-    The "debug" directory contains some tools that are useful only when
-    hacking on XZ Utils. Don't package these tools.
-
-
-7. Installing XZ Utils and LZMA Utils in parallel
--------------------------------------------------
-
-    XZ Utils and LZMA Utils 4.32.x can be installed in parallel by
-    omitting the compatibility symlinks (lzma, unlzma, lzcat, lzgrep etc.)
-    from the XZ Utils package. It's probably a good idea to still package
-    the symlinks into a separate package so that users may choose if they
-    want to use XZ Utils or LZMA Utils for handling .lzma files.
-
-
-8. Example
-----------
-
-    Here is an example for i686 GNU/Linux that
-      - links xz and lzmainfo against shared liblzma;
-      - links size-optimized xzdec and lzmadec against static liblzma
-        while avoiding libpthread dependency;
-      - includes only shared liblzma in the final package; and
-      - copies also the "extra" directory to the package.
-
-    PKG=/tmp/xz-pkg
-    tar xf xz-x.y.z.tar.gz
-    cd xz-x.y.z
-    ./configure \
-            --prefix=/usr \
-            --disable-static \
-            --disable-xzdec \
-            --disable-lzmadec \
-            CFLAGS='-march=i686 -mtune=generic -O2'
-    make
-    make DESTDIR=$PKG install-strip
-    make clean
-    ./configure \
-            --prefix=/usr \
-            --disable-shared \
-            --disable-nls \
-            --disable-encoders \
-            --enable-small \
-            --disable-threads \
-            CFLAGS='-march=i686 -mtune=generic -Os'
-    make -C src/liblzma
-    make -C src/xzdec
-    make -C src/xzdec DESTDIR=$PKG install-strip
-    cp -a extra $PKG/usr/share/doc/xz
-

README

@@ -1,281 +1,184 @@
 
-XZ Utils
+LZMA Utils
-========
+----------
 
-    0. Overview
+Warning
-    1. Documentation
+
-       1.1. Overall documentation
+    This is an early alpha version. Don't trust the files produced by
-       1.2. Documentation for command-line tools
+    this version of the software - not even if the software can
-       1.3. Documentation for liblzma
+    uncompress the files properly! This is because the file format
-    2. Version numbering
+    isn't completely frozen yet.
-    3. Reporting bugs
+
-    4. Translations
+    So please test a lot, but don't use for anything serious yet.
-       4.1. Testing translations
-    5. Other implementations of the .xz format
-    6. Contact information
 
 
-0. Overview
+Overview
------------
 
-    XZ Utils provide a general-purpose data-compression library plus
+    LZMA is a general purporse compression algorithm designed by
-    command-line tools. The native file format is the .xz format, but
+    Igor Pavlov as part of 7-Zip. It provides high compression ratio
-    also the legacy .lzma format is supported. The .xz format supports
+    while keeping the decompression speed fast.
-    multiple compression algorithms, which are called "filters" in the
-    context of XZ Utils. The primary filter is currently LZMA2. With
-    typical files, XZ Utils create about 30 % smaller files than gzip.
 
-    To ease adapting support for the .xz format into existing applications
+    LZMA Utils are an attempt to make LZMA compression easy to use
-    and scripts, the API of liblzma is somewhat similar to the API of the
+    on free (as in freedom) operating systems. This is achieved by
-    popular zlib library. For the same reason, the command-line tool xz
+    providing tools and libraries which are similar to use than the
-    has a command-line syntax similar to that of gzip.
+    equivalents of the most popular existing compression algorithms.
 
-    When aiming for the highest compression ratio, the LZMA2 encoder uses
+    LZMA Utils consist of a few relatively separate parts:
-    a lot of CPU time and may use, depending on the settings, even
+      * liblzma is an encoder/decoder library with support for several
-    hundreds of megabytes of RAM. However, in fast modes, the LZMA2 encoder
+        filters (algorithm implementations). The primary filter is LZMA.
-    competes with bzip2 in compression speed, RAM usage, and compression
+      * libzfile enables reading from and writing to gzip, bzip2 and
-    ratio.
+        LZMA compressed and uncompressed files with an API similar to
-
+        the standard ANSI-C file I/O.
-    LZMA2 is reasonably fast to decompress. It is a little slower than
+        [ NOTE: libzfile is not implemented yet. ]
-    gzip, but a lot faster than bzip2. Being fast to decompress means
+      * lzma command line tool has almost identical syntax than gzip
-    that the .xz format is especially nice when the same file will be
+        and bzip2. It makes LZMA easy for average users, but also
-    decompressed very many times (usually on different computers), which
+        provides advanced options to finetune the compression settings.
-    is the case e.g. when distributing software packages. In such
+      * A few shell scripts make diffing and grepping LZMA compressed
-    situations, it's not too bad if the compression takes some time,
+        files easy. The scripts were adapted from gzip and bzip2.
-    since that needs to be done only once to benefit many people.
-
-    With some file types, combining (or "chaining") LZMA2 with an
-    additional filter can improve the compression ratio. A filter chain may
-    contain up to four filters, although usually only one or two are used.
-    For example, putting a BCJ (Branch/Call/Jump) filter before LZMA2
-    in the filter chain can improve compression ratio of executable files.
-
-    Since the .xz format allows adding new filter IDs, it is possible that
-    some day there will be a filter that is, for example, much faster to
-    compress than LZMA2 (but probably with worse compression ratio).
-    Similarly, it is possible that some day there is a filter that will
-    compress better than LZMA2.
-
-    XZ Utils supports multithreaded compression. XZ Utils doesn't support
-    multithreaded decompression yet. It has been planned though and taken
-    into account when designing the .xz file format. In the future, files
-    that were created in threaded mode can be decompressed in threaded
-    mode too.
 
 
-1. Documentation
+Supported platforms
-----------------
 
-1.1. Overall documentation
+    LZMA Utils are developed on GNU+Linux, but they should work at
+    least on *BSDs and Solaris. They probably work on some other
+    POSIX-like operating systems too.
 
-    README                This file
+    If you use GCC to compile LZMA Utils, you need at least version
+    3.x.x. GCC version 2.xx.x doesn't support some C99 features used
+    in LZMA Utils source code, thus GCC 2 won't compile LZMA Utils.
 
-    INSTALL.generic       Generic install instructions for those not
+    If you have written patches to make LZMA Utils to work on previously
-                          familiar with packages using GNU Autotools
+    unsupported platform, please send the patches to me! I will consider
-    INSTALL               Installation instructions specific to XZ Utils
+    including them to the official version. It's nice to minimize the
-    PACKAGERS             Information to packagers of XZ Utils
+    need of third-party patching.
 
-    COPYING               XZ Utils copyright and license information
+    One exception: Don't request or send patches to change the whole
-    COPYING.0BSD          BSD Zero Clause License
+    source package to C89. I find C99 substantially nicer to write and
-    COPYING.GPLv2         GNU General Public License version 2
+    maintain. However, the public library headers must be in C89 to
-    COPYING.GPLv3         GNU General Public License version 3
+    avoid frustrating those who maintain programs, which are strictly
-    COPYING.LGPLv2.1      GNU Lesser General Public License version 2.1
+    in C89 or C++.
-
-    AUTHORS               The main authors of XZ Utils
-    THANKS                Incomplete list of people who have helped making
-                          this software
-    NEWS                  User-visible changes between XZ Utils releases
-    ChangeLog             Detailed list of changes (commit log)
-    TODO                  Known bugs and some sort of to-do list
-
-    Note that only some of the above files are included in binary
-    packages.
 
 
-1.2. Documentation for command-line tools
+Version numbering
 
-    The command-line tools are documented as man pages. In source code
+    Starting from LZMA Utils 5, the version number of LZMA Utils has
-    releases (and possibly also in some binary packages), the man pages
+    absolutely nothing to do with the version number of LZMA SDK or
-    are also provided in plain text (ASCII only) format in the directory
+    7-Zip. The new version number format of LZMA Utils is X.Y.ZS:
-    "doc/man" to make the man pages more accessible to those whose
-    operating system doesn't provide an easy way to view man pages.
-
-
-1.3. Documentation for liblzma
-
-    The liblzma API headers include short docs about each function
-    and data type as Doxygen tags. These docs should be quite OK as
-    a quick reference.
-
-    There are a few example/tutorial programs that should help in
-    getting started with liblzma. In the source package the examples
-    are in "doc/examples" and in binary packages they may be under
-    "examples" in the same directory as this README.
-
-    Since the liblzma API has similarities to the zlib API, some people
-    may find it useful to read the zlib docs and tutorial too:
-
-        https://zlib.net/manual.html
-        https://zlib.net/zlib_how.html
-
-
-2. Version numbering
---------------------
-
-    The version number format of XZ Utils is X.Y.ZS:
 
       - X is the major version. When this is incremented, the library
         API and ABI break.
 
-      - Y is the minor version. It is incremented when new features
+      - Y is the minor version. It is incremented when new features are
-        are added without breaking the existing API or ABI. An even Y
+        added without breaking existing API or ABI. Even Y indicates
-        indicates a stable release and an odd Y indicates unstable
+        stable release and odd Y indicates unstable (alpha or beta
-        (alpha or beta version).
+        version).
 
-      - Z is the revision. This has a different meaning for stable and
+      - Z is the revision. This has different meaning for stable and
         unstable releases:
-
           * Stable: Z is incremented when bugs get fixed without adding
-            any new features. This is intended to be convenient for
+            any new features.
-            downstream distributors that want bug fixes but don't want
-            any new features to minimize the risk of introducing new bugs.
-
           * Unstable: Z is just a counter. API or ABI of features added
             in earlier unstable releases having the same X.Y may break.
 
       - S indicates stability of the release. It is missing from the
-        stable releases, where Y is an even number. When Y is odd, S
+        stable releases where Y is an even number. When Y is odd, S
         is either "alpha" or "beta" to make it very clear that such
         versions are not stable releases. The same X.Y.Z combination is
-        not used for more than one stability level, i.e. after X.Y.Zalpha,
+        not used for more than one stability level i.e. after X.Y.Zalpha,
         the next version can be X.Y.(Z+1)beta but not X.Y.Zbeta.
 
 
-3. Reporting bugs
+configure options
------------------
 
-    Naturally it is easiest for me if you already know what causes the
+    If you are not familiar with `configure' scripts, read the file
-    unexpected behavior. Even better if you have a patch to propose.
+    INSTALL first.
-    However, quite often the reason for unexpected behavior is unknown,
-    so here are a few things to do before sending a bug report:
 
-      1. Try to create a small example how to reproduce the issue.
+    In most cases, the default --enable/--disable/--with/--without options
+    are what you want. Don't touch them if you are unsure.
 
-      2. Compile XZ Utils with debugging code using configure switches
+    --disable-encoder
-         --enable-debug and, if possible, --disable-shared. If you are
+                Do not compile the encoder component of liblzma. This
-         using GCC, use CFLAGS='-O0 -ggdb3'. Don't strip the resulting
+                implies --disable-match-finders. If you need only
+                the decoder, you can decrease the library size
+                dramatically with this option.
+
+                The default is to build the encoder.
+
+    --disable-decoder
+                Do not compile the decoder component of liblzma.
+
+                The default is to build the decoder.
+
+    --enable-filters=
+                liblzma supports several filters. See liblzma-intro.txt
+                for a little more information about these.
+
+                The default is to build all the filters.
+
+    --enable-match-finders=
+                liblzma includes two categories of match finders:
+                hash chains and binary trees. Hash chains (hc3 and hc4)
+                are quite fast but they don't provide the best compression
+                ratio. Binary trees (bt2, bt3 and bt4) give excellent
+                compression ratio, but they are slower and need more
+                memory than hash chains.
+
+                You need to enable at least one match finder to build the
+                LZMA filter encoder. Usually hash chains are used only in
+                the fast mode, while binary trees are used to when the best
+                compression ratio is wanted.
+
+                The default is to build all the match finders.
+
+    --enable-checks=
+                liblzma support multiple integrity checks. CRC32 is
+                mandatory, and cannot be omitted. See liblzma-intro.txt
+                for more information about usage of the integrity checks.
+
+    --disable-assembler
+                liblzma includes some assembler optimizations. Currently
+                there is only assembler code for CRC32 and CRC64 for
+                32-bit x86.
+
+                All the assembler code in liblzma is position-independent
+                code, which is suitable for use in shared libraries and
+                position-independent executables. So far only i386
+                instructions are used, but the code is optimized for i686
+                class CPUs. If you are compiling liblzma exclusively for
+                pre-i686 systems, you may want to disable the assembler
+                code.
+
+    --enable-small
+                Omits precomputed tables. This makes liblzma a few KiB
+                smaller. Startup time increases, because the tables need
+                to be computed first.
+
+    --enable-debug
+                This enables the assert() macro and possibly some other
+                run-time consistency checks. It slows down things somewhat,
+                so you normally don't want to have this enabled.
+
+    --enable-werror
+                Makes all compiler warnings an error, that abort the
+                compilation. This may help catching bugs, and should work
+                on most systems. This has no effect on the resulting
                 binaries.
 
-      3. Turn on core dumps. The exact command depends on your shell;
-         for example in GNU bash it is done with "ulimit -c unlimited",
-         and in tcsh with "limit coredumpsize unlimited".
 
-      4. Try to reproduce the suspected bug. If you get "assertion failed"
+Static vs. dynamic linking of the command line tools
-         message, be sure to include the complete message in your bug
-         report. If the application leaves a coredump, get a backtrace
-         using gdb:
-           $ gdb /path/to/app-binary   # Load the app to the debugger.
-           (gdb) core core   # Open the coredump.
-           (gdb) bt   # Print the backtrace. Copy & paste to bug report.
-           (gdb) quit   # Quit gdb.
 
-    Report your bug via email or IRC (see Contact information below).
+    By default, the command line tools are linked statically against
-    Don't send core dump files or any executables. If you have a small
+    liblzma. There a are a few reasons:
-    example file(s) (total size less than 256 KiB), please include
-    it/them as an attachment. If you have bigger test files, put them
-    online somewhere and include a URL to the file(s) in the bug report.
 
-    Always include the exact version number of XZ Utils in the bug report.
+      - The executable(s) can be in /bin while the shared liblzma can still
-    If you are using a snapshot from the git repository, use "git describe"
+        be in /usr/lib (if the distro uses such file system hierachy).
-    to get the exact snapshot version. If you are using XZ Utils shipped
-    in an operating system distribution, mention the distribution name,
-    distribution version, and exact xz package version; if you cannot
-    repeat the bug with the code compiled from unpatched source code,
-    you probably need to report a bug to your distribution's bug tracking
-    system.
 
+      - It's easier to copy the executables to other systems, since they
+        depend only on libc.
 
-4. Translations
+      - It's slightly faster on some architectures like x86.
----------------
 
-    The xz command line tool and all man pages can be translated.
+    If you don't like this, you can get the command line tools linked
-    The translations are handled via the Translation Project. If you
+    against the shared liblzma by specifying --disable-static to configure.
-    wish to help translating xz, please join the Translation Project:
+    This disables building static liblzma completely.
-
-        https://translationproject.org/html/translators.html
-
-    Updates to translations won't be accepted by methods that bypass
-    the Translation Project because there is a risk of duplicate work:
-    translation updates made in the xz repository aren't seen by the
-    translators in the Translation Project. If you have found bugs in
-    a translation, please report them to the Language-Team address
-    which can be found near the beginning of the PO file.
-
-    If you find language problems in the original English strings,
-    feel free to suggest improvements. Ask if something is unclear.
-
-
-4.1. Testing translations
-
-    Testing can be done by installing xz into a temporary directory.
-
-    If building from Git repository (not tarball), generate the
-    Autotools files:
-
-        ./autogen.sh
-
-    Create a subdirectory for the build files. The tmp-build directory
-    can be deleted after testing.
-
-        mkdir tmp-build
-        cd tmp-build
-        ../configure --disable-shared --enable-debug --prefix=$PWD/inst
-
-    Edit the .po file in the po directory. Then build and install to
-    the "tmp-build/inst" directory, and use translations.bash to see
-    how some of the messages look. Repeat these  steps if needed:
-
-        make -C po update-po
-        make -j"$(nproc)" install
-        bash ../debug/translation.bash | less
-        bash ../debug/translation.bash | less -S  # For --list outputs
-
-    To test other languages, set the LANGUAGE environment variable
-    before running translations.bash. The value should match the PO file
-    name without the .po suffix. Example:
-
-        export LANGUAGE=fi
-
-
-5. Other implementations of the .xz format
-------------------------------------------
-
-    7-Zip and the p7zip port of 7-Zip support the .xz format starting
-    from the version 9.00alpha.
-
-        https://7-zip.org/
-        https://p7zip.sourceforge.net/
-
-    XZ Embedded is a limited implementation written for use in the Linux
-    kernel, but it is also suitable for other embedded use.
-
-        https://tukaani.org/xz/embedded.html
-
-    XZ for Java is a complete implementation written in pure Java.
-
-        https://tukaani.org/xz/java.html
-
-
-6. Contact information
-----------------------
-
-    XZ Utils in general:
-      - Home page: https://tukaani.org/xz/
-      - Email to maintainer(s): xz@tukaani.org
-      - IRC: #tukaani on Libera Chat
-      - GitHub: https://github.com/tukaani-project/xz
-
-    Lead maintainer:
-      - Email: Lasse Collin <lasse.collin@tukaani.org>
-      - IRC: Larhzu on Libera Chat
 

THANKS

@@ -1,257 +1,27 @@
 
 Thanks
-======
+------
 
-Some people have helped more, some less, but nevertheless everyone's help
+Some people have helped more, some less, some don't even know they have
-has been important. :-)
+been helpful, but nevertheless everyone's help has been important. :-)
-  - Adam Borowski
+In alphabetical order:
-  - Adam Walling
-  - Adrien Nader
-  - Agostino Sarubbo
-  - Alexander Bluhm
-  - Alexander M. Greenham
-  - Alexander Neumann
-  - Alexandre Sauvé
-  - Alexey Tourbin
-  - Anders F. Björklund
-  - Andraž 'ruskie' Levstik
-  - Andre Noll
-  - Andreas K. Hüttel
-  - Andreas Müller
-  - Andreas Schwab
-  - Andreas Zieringer
-  - Andrej Skenderija
-  - Andres Freund
-  - Andrew Dudman
-  - Andrew Murray
-  - Antoine Cœur
-  - Anton Kochkov
-  - Antonio Diaz Diaz
-  - Arkadiusz Miskiewicz
-  - Asgeir Storesund Nilsen
-  - Aziz Chaudhry
-  - Bela Lubkin
-  - Ben Boeckel
-  - Benjamin Buch
-  - Benno Schulenberg
-  - Bernhard Reutner-Fischer
-  - Bert Wesarg
-  - Bhargava Shastry
-  - Bill Glessner
-  - Bjarni Ingi Gislason
-  - Boud Roukema
-  - Brad Smith
-  - Bruce Stark
-  - Cary Lewis
-  - Charles Wilson
-  - Chenxi Mao
-  - Chien Wong
-  - Chris Donawa
-  - Chris McCrohan
-  - Christian Hesse
-  - Christian Kujau
-  - Christian von Roques
-  - Christian Weisgerber
-  - Christoph Junghans
-  - Collin Funk
-  - Conley Moorhous
-  - Cristian Rodríguez
-  - Cristiano Ceglia
-  - Dan Shechter
-  - Dan Stromberg
-  - Dan Weiss
-  - Daniel Leonard
-  - Daniel Mealha Cabrita
-  - Daniel Packard
-  - Daniel Richard G.
-  - David Burklund
-  - Denis Excoffier
-  - Derwin McGeary
-  - Dexter Castor Döpping
-  - Diederik de Haas
-  - Diego Elio Pettenò
-  - Dimitri Papadopoulos Orfanos
-  - Dirk Müller
-  - Douglas Thor
-  - Ed Maste
-  - Elbert Pol
-  - Eli Schwartz
-  - Elijah Almeida Coimbra
-  - Émilie Labbé
-  - Emmanuel Blot
-  - Eric Lindblad
-  - Eric S. Raymond
-  - Étienne Mollier
-  - Evan Nemerson
-  - Fangrui Song
-  - Felix Collin
-  - Filip Palian
-  - Firas Khalil Khana
-  - François Etcheverry
-  - Frank Busse
-  - Frank Prochnow
-  - Fredrik Wikstrom
-  - Gabi Davar
-  - Gabriela Gutierrez
-  - Gilles Espinasse
-  - Gregory Margo
-  - Guillaume Outters
-  - Guiorgy Potskhishvili
-  - H. Peter Anvin
-  - Hajin Jang
-  - Hans Jansen
-  - Harri K. Koskinen
-  - Hin-Tak Leung
-  - H.J. Lu
-  - Hongbo Ni
-  - Igor Pavlov
-  - İhsan Doğan
-  - Ilya Kurdyukov
-  - Iouri Kharon
-  - İsmail Dönmez
-  - Ivan A. Melnikov
-  - Jakub Bogusz
-  - James Buren
-  - James M Leddy
-  - Jan Kratochvil
-  - Jan Terje Hansen
-  - Jason Gorski
-  - Jeff Bastian
-  - Jeffrey Walton
-  - Jeroen Roovers
-  - Jim Meyering
-  - Jim Wilcoxson
-  - Joachim Henke
-  - John Paul Adrian Glaubitz
-  - Jonathan Nieder
-  - Jonathan Stott
-  - Joona Kannisto
-  - Jouk Jansen
-  - Juan Manuel Guerrero
-  - Jukka Salmi
-  - Julien Marrec
-  - Jun I Jin
-  - Kai Pastor
-  - Karl Beldan
-  - Karl Berry
-  - Keith Patton
-  - Kelvin Lee
-  - Kevin R. Bulgrien
-  - Kian-Meng Ang
-  - Kim Jinyeong
-  - Kirill A. Korinsky
-  - Kiyoshi Kanazawa
-  - Lars Wirzenius
-  - Li Chenggang
-  - Lizandro Heredia
-  - Loganaden Velvindron
-  - Lorenzo De Liso
-  - Lukas Braune
-  - Maarten Bosmans
-  - Maksym Vatsyk
-  - Marcin Kowalczyk
-  - Marcus Comstedt
-  - Marcus Tillmanns
-  - Marek Černocký
   - Mark Adler
-  - Mark Wielaard
-  - Markus Duft
-  - Markus Rickert
-  - Martin Blumenstingl
-  - Martin Matuška
-  - Martin Storsjö
-  - Martin Väth
-  - Mathieu Vachon
-  - Matthew Good
-  - Matthieu Rakotojaona
-  - Melanie Blower
-  - Michael Felt
-  - Michael Fox
-  - Michał Górny
-  - Mike Frysinger
-  - Mikko Pouru
-  - Milo Casagrande
-  - Mohammed Adnène Trojette
-  - Nathan Moinvaziri
   - Nelson H. F. Beebe
-  - Nicholas Jackson
+  - Anders F. Björklund
-  - Ole André Vadla Ravnås
+  - İsmail Dönmez
-  - Orange Tsai
+  - Jean-loup Gailly
-  - Orgad Shaneh
-  - Patrick J. Volkerding
-  - Paul Eggert
-  - Paul Townsend
-  - Pavel Raiskup
   - Per Øyvind Karlsen
-  - Peter Ivanov
-  - Peter Lawler
-  - Peter O'Gorman
-  - Peter Pallinger
-  - Peter Seiderer
-  - Pierre-Yves Martin
-  - Pilorz Wojciech
-  - Pippijn van Steenhoven
-  - Rafał Mużyło
-  - Rainer Müller
-  - Ralf Wildenhues
-  - Rich Prohaska
-  - Richard Koch
-  - Richard W.M. Jones
-  - Robert Elz
-  - Robert Readman
-  - Roel Bouckaert
-  - Ron Desmond
-  - Ruarí Ødegaard
-  - Rui Paulo
-  - Ryan Colyer
-  - Ryan Young
-  - Sam James
-  - Scott McAllister
-  - Sean Fenian
-  - Sebastian Andrzej Siewior
-  - Sergey Kosukhin
-  - Simon Josefsson
-  - Siteshwar Vashisht
-  - Steffen Nurpmeso
-  - Stephan Kulow
-  - Stephen Sachs
-  - Stuart Shelton
-  - Taiki Tsunekawa
-  - Thomas Klausner
-  - Tobias Lahrmann Hansen
-  - Tobias Stoeckmann
-  - Tomasz Gajc
-  - Tomer Chachamu
-  - Torsten Rupp
-  - Trần Ngọc Quân
-  - Trent W. Buck
-  - Victoria Alexia
-  - Vijay Sarvepalli
   - Ville Koskinen
-  - Ville Skyttä
+  - Stephan Kulow
-  - Vincent Cruz
+  - Jim Meyering
-  - Vincent Fazio
+  - Igor Pavlov
-  - Vincent Lefevre
+  - Mikko Pouru
-  - Vincent Torri
+  - Alexandre Sauvé
-  - Vincent Wixsom
+  - Julian Seward
-  - Vincenzo Innocente
+  - Paul Townsend
-  - Vitaly Chikunov
+  - Mohammed Adnène Trojette
-  - Wim Lewis
+  - Andreas Zieringer
-  - Xi Ruoyao
-  - Xin Li
-  - Yifeng Li
-  - 榆柳松 (ZhengSen Wang)
 
-Companies:
+Also thanks to all the people who have participated the Tukaani project
-  - Google
+and others who I have forgot.
-  - Sandfly Security
-
-Other credits:
-  - cleemy desu wayo working with Trend Micro Zero Day Initiative
-  - Orange Tsai and splitline from DEVCORE Research Team
-
-Also thanks to all the people who have participated in the Tukaani project.
-
-I have probably forgot to add some names to the above list. Sorry about
-that and thanks for your help.
 

TODO

@@ -1,88 +1,109 @@
 
-XZ Utils To-Do List
+LZMA Utils TODO List
-===================
+--------------------
 
-Known bugs
+Major missing features
-----------
 
-    The test suite is incomplete.
+    Memory limits in the command line tool apply only to compression.
 
-    XZ Utils compress some files significantly worse than LZMA Utils.
+    Threading support in the lzma command line tool is still primitive.
-    This is due to faster compression presets used by XZ Utils, and
+    It cannot split a file in pieces yet.
-    can often be worked around by using "xz --extreme". With some files
-    --extreme isn't enough though: it's most likely with files that
-    compress extremely well, so going from compression ratio of 0.003
-    to 0.004 means big relative increase in the compressed file size.
 
-    tuklib_exit() doesn't block signals => EINTR is possible.
+    The --list mode isn't implemented in the command line tool.
 
-    If liblzma has created threads and fork() gets called, liblzma
+    Handling of Multi-Block Stream information should be separated
-    code will break in the child process unless it calls exec() and
+    from Stream encoder and decoder. Those would be useful to implement
-    doesn't touch liblzma.
+    multi-threaded coding in applications.
+
+    Buffer to buffer coding is not implemented in liblzma. Probably
+    a naive version should be written first, which would simply wrap
+    things around lzma_stream. Later, there should be separate buffer
+    coding functions, that are slightly faster (less memcpy()) and
+    have smaller memory usage than the functions using lzma_stream.
+
+    libzfile is not implemented.
+
+    LZMA filter doesn't support predefined history buffer.
 
 
-Missing features
+Security
-----------------
 
-    Add support for storing metadata in .xz files. A preliminary
+    Search for bugs, especially security related issues. Security is
-    idea is to create a new Stream type for metadata. When both
+    important in every piece of code in LZMA Utils, but it is extremely
-    metadata and data are wanted in the same .xz file, two or more
+    important in the decoder part of liblzma.
-    Streams would be concatenated.
 
-    The state stored in lzma_stream should be cloneable, which would
+    Subblock: If there is LZMA as a Subfilter but without EOPM, can it
-    be mostly useful when using a preset dictionary in LZMA2, but
+    trigger infinite loop when Subblock's "Unset Subfilter" flag is hit?
-    it may have other uses too. Compare to deflateCopy() in zlib.
 
-    Adjust dictionary size when the input file size is known.
+    Similarly, can LZ decoder get stuck in infinite loop if the next
-    Maybe do this only if an option is given.
+    filter in the chain returns LZMA_STREAM_END but the decoded data
+    doesn't allow finishing the LZ decoding?
 
-    xz doesn't support copying extended attributes, access control
-    lists etc. from source to target file.
 
-    Multithreaded compression:
+Reliability
-      - Reduce memory usage of the current method.
-      - Implement threaded match finders.
-      - Implement pigz-style threading in LZMA2.
 
-    Buffer-to-buffer coding could use less RAM (especially when
+    Create a test suite to be run with "make check".
-    decompressing LZMA1 or LZMA2).
 
-    I/O library is not implemented (similar to gzopen() in zlib).
+    Should we use strlimit() and getrlimit() for memory usage limitting?
-    It will be a separate library that supports uncompressed, .gz,
-    .bz2, .lzma, and .xz files.
 
-    Support changing lzma_options_lzma.mode with lzma_filters_update().
 
-    Support LZMA_FULL_FLUSH for lzma_stream_decoder() to stop at
+Performance
-    Block and Stream boundaries.
 
-    Error codes from lzma_code() aren't very specific. A more detailed
+    Benchmark the CRC code on non-x86 CPUs. Won't have huge effect on
-    error message (string) could be provided too. It could be returned
+    overall speed, but it would still be nice to know what algorithm
-    by a new function or use a currently-reserved member of lzma_stream.
+    variant is the best on different CPUs.
 
-    Make it possible to adjust LZMA2 options in the middle of a Block
-    so that the encoding speed vs. compression ratio can be optimized
-    when the compressed data is streamed over network.
 
-    Improved BCJ filters. The current filters are small but they aren't
+Third party support
-    so great when compressing binary packages that contain various file
-    types. Specifically, they make things worse if there are static
-    libraries or Linux kernel modules. The filtering could also be
-    more effective (without getting overly complex), for example,
-    streamable variant BCJ2 from 7-Zip could be implemented.
 
-    Filter that autodetects specific data types in the input stream
+    Add support for LZMA to various applications. This naturally requires
-    and applies appropriate filters for the corrects parts of the input.
+    cooperating with the authors of the specific applications.
-    Perhaps combine this with the BCJ filter improvement point above.
+      * GNU grep and GNU diffutils: BSD grep already uses zlib directly
+        instead of ugly shell scripts. It would be nice to get similar
+        feature into relevant GNU tools. With libzfile, multiple
+        compression formats would be easy to support.
+      * kioslave for KDE
+      * Magic for the `file' command
+      * GNU Midnight Commander
+      * GNU Texinfo
+      * The `man' command
+      * Package managers
 
-    Long-range LZ77 method as a separate filter or as a new LZMA2
+    Test the patches already written. The patches should be sent to
-    match finder.
+    upstream developers _once_ LZMA Utils APIs are stable enough (so
+    people don't need to fix those patches all the time).
+
+    Mandriva has quite a few patches. Some of them are OK, some need
+    adapting for new LZMA Utils.
 
 
 Documentation
--------------
 
-    More tutorial programs are needed for liblzma.
+    Revise the man page of lzma command line tool.
 
-    Document the LZMA1 and LZMA2 algorithms.
+    If the Doxygen docs aren't enough, write good Texinfo manual for
+    liblzma. It's been a long time I've even tried to build the Doxygen
+    docs, so they may look quite bad at the moment.
+
+    Document LZMA as an algorithm. It would be great to have detailed
+    description of the algorithm in English. Many people think, that
+    reading the source code is not the optimal way to learn how LZMA
+    works.
+
+
+Other
+
+    Some things return LZMA_PROG_ERROR with invalid options, some
+    LZMA_HEADER_ERROR. These must be checked carefully and made so
+    that LZMA_HEADER_ERROR is used only when the given option could
+    make sense in future version of libzma.
+
+    lzma_restrict vs. restrict
+
+    Usage of LZMA_RUN vs. LZMA_FINISH with Metadata coders.
+
+    Port the Deflate implementation from 7-Zip into liblzma. 7-Zip's
+    Deflate compresses better than zlib, gzip or Info-ZIP. I don't
+    know if Deflate will be included in .lzma format (probably not),
+    but it's still useful once we also add support for .gz file format.
 

autogen.sh

@@ -1,42 +1,38 @@
 #!/bin/sh
-# SPDX-License-Identifier: 0BSD
-
-###############################################################################
-#
-# Author: Lasse Collin
-#
-###############################################################################
 
 set -e -x
 
-# The following six lines are almost identical to "autoreconf -fi" but faster.
+# autooint copies all kinds of crap even though we have told in
-${AUTOPOINT:-autopoint} -f
+# configure.ac that we don't want the intl directory. It is able
-${LIBTOOLIZE:-libtoolize} -c -f || glibtoolize -c -f
+# to omit the intl directory but still copies the m4 files needed
-${ACLOCAL:-aclocal} -I m4
+# only by the stuff in the non-existing intl directory.
-${AUTOCONF:-autoconf}
+autopoint -f
-${AUTOHEADER:-autoheader}
+rm -f \
-${AUTOMAKE:-automake} -acf --foreign
+	codeset.m4 \
+	glibc2.m4 \
+	glibc21.m4 \
+	intdiv0.m4 \
+	intl.m4 \
+	intldir.m4 \
+	intmax.m4 \
+	inttypes-pri.m4 \
+	inttypes_h.m4 \
+	lcmessage.m4 \
+	lock.m4 \
+	longdouble.m4 \
+	longlong.m4 \
+	printf-posix.m4 \
+	size_max.m4 \
+	stdint_h.m4 \
+	uintmax_t.m4 \
+	ulonglong.m4 \
+	visibility.m4 \
+	wchar_t.m4 \
+	wint_t.m4 \
+	xsize.m4
 
-# Generate the translated man pages if the "po4a" tool is available.
+libtoolize -c -f || glibtoolize -c -f
-# This is *NOT* done by "autoreconf -fi" or when "make" is run.
+aclocal -I m4
-# Pass --no-po4a to this script to skip this step.
+autoconf
-# It can be useful when you know that po4a isn't available and
+autoheader
-# don't want autogen.sh to exit with non-zero exit status.
+automake -acf --foreign
-generate_po4a="y"
-
-for arg in "$@"
-do
-	case $arg in
-		"--no-po4a")
-			generate_po4a="n"
-			;;
-	esac
-done
-
-if test "$generate_po4a" != "n"; then
-	cd po4a
-	sh update-po
-	cd ..
-fi
-
-exit 0

build-aux/ci_build.bash

@@ -1,295 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# Script meant to be used for Continuous Integration automation for POSIX
-# systems. On GitHub, this is used by Ubuntu and MacOS builds.
-#
-#############################################################################
-#
-# Author: Jia Tan
-#
-#############################################################################
-
-set -e
-
-USAGE="Usage: $0
-  -a [autogen flags]
-  -b [autotools|cmake]
-  -c [crc32|crc64|sha256]
-  -d [encoders|decoders|bcj|delta|threads|shared|nls|small|clmul|sandbox]
-  -f [CFLAGS]
-  -l [destdir]
-  -m [compiler]
-  -n [ARTIFACTS_DIR_NAME]
-  -p [all|build|test]
-  -s [srcdir]"
-
-# Absolute path of script directory
-ABS_DIR=$(cd -- "$(dirname -- "$0")" && pwd)
-
-# Default CLI option values
-AUTOGEN_FLAGS=""
-BUILD_SYSTEM="autotools"
-CHECK_TYPE="crc32,crc64,sha256"
-BCJ="y"
-DELTA="y"
-ENCODERS="y"
-DECODERS="y"
-THREADS="y"
-SHARED="y"
-NATIVE_LANG_SUPPORT="y"
-SMALL="n"
-CLMUL="y"
-SANDBOX="y"
-DOXYGEN="y"
-SRC_DIR="$ABS_DIR/../"
-DEST_DIR="$SRC_DIR/../xz_build"
-PHASE="all"
-ARTIFACTS_DIR_NAME="output"
-
-[[ -z ${CPU_COUNT} ]] && { CPU_COUNT=$(nproc 2>/dev/null || sysctl -n hw.activecpu); }
-[[ -z ${MAKEFLAGS} ]] && export MAKEFLAGS="-j${CPU_COUNT} -l${CPU_COUNT}"
-[[ -z ${CFLAGS} ]] && export CFLAGS="-O2"
-
-###################
-# Parse arguments #
-###################
-
-while getopts a:b:c:d:l:m:n:s:p:f:w:h opt; do
-	# b option can have either value "autotools" OR "cmake"
-	case ${opt} in
-	h)
-		echo "$USAGE"
-		exit 0
-	;;
-	a)
-		AUTOGEN_FLAGS="$OPTARG"
-	;;
-	b)
-		case "$OPTARG" in
-			autotools) ;;
-			cmake) ;;
-			*) echo "Invalid build system: $OPTARG"; exit 1;;
-		esac
-		BUILD_SYSTEM="$OPTARG"
-	;;
-	c) CHECK_TYPE="$OPTARG"
-	;;
-	# d options can be a comma separated list of things to disable at
-	# configure time
-	d)
-	for disable_arg in $(echo "$OPTARG" | sed "s/,/ /g"); do
-		case "$disable_arg" in
-		encoders) ENCODERS="n" ;;
-		decoders) DECODERS="n" ;;
-		bcj) BCJ="n" ;;
-		delta) DELTA="n" ;;
-		threads) THREADS="n" ;;
-		shared) SHARED="n";;
-		nls) NATIVE_LANG_SUPPORT="n";;
-		small) SMALL="y";;
-		clmul) CLMUL="n";;
-		sandbox) SANDBOX="n";;
-		doxygen) DOXYGEN="n";;
-		*) echo "Invalid disable value: $disable_arg"; exit 1 ;;
-		esac
-	done
-	;;
-	l) DEST_DIR="$OPTARG"
-	;;
-	m)
-		CC="$OPTARG"
-		export CC
-	;;
-	n) ARTIFACTS_DIR_NAME="$OPTARG"
-	;;
-	s) SRC_DIR="$OPTARG"
-	;;
-	p) PHASE="$OPTARG"
-	;;
-	f)
-		CFLAGS+=" $OPTARG"
-		export CFLAGS
-	;;
-	w) WRAPPER="$OPTARG"
-	;;
-	*)
-		echo "Unsupported option: $opt"
-		exit 1
-	;;
-	esac
-done
-
-
-####################
-# Helper Functions #
-####################
-
-# These two functions essentially implement the ternary "?" operator.
-add_extra_option() {
-	# First argument is option value ("y" or "n")
-	# Second argument is option to set if "y"
-	# Third argument is option to set if "n"
-	if [ "$1" = "y" ]
-	then
-		EXTRA_OPTIONS="$EXTRA_OPTIONS $2"
-	else
-		EXTRA_OPTIONS="$EXTRA_OPTIONS $3"
-	fi
-}
-
-
-add_to_filter_list() {
-	# First argument is option value ("y" or "n")
-	# Second argument is option to set if "y"
-	if [ "$1" = "y" ]
-	then
-		FILTER_LIST="$FILTER_LIST$2"
-	fi
-}
-
-
-###############
-# Build Phase #
-###############
-
-if [ "$PHASE" = "all" ] || [ "$PHASE" = "build" ]
-then
-	# Checksum options should be specified differently based on the
-	# build system. It must be calculated here since we won't know
-	# the build system used until all args have been parsed.
-	# Autotools - comma separated
-	# CMake - semi-colon separated
-	if [ "$BUILD_SYSTEM" = "autotools" ]
-	then
-		SEP=","
-	else
-		SEP=";"
-	fi
-
-	CHECK_TYPE_TEMP=""
-	for crc in $(echo "$CHECK_TYPE" | sed "s/,/ /g"); do
-			case "$crc" in
-			crc32 | crc64 | sha256) ;;
-			*) echo "Invalid check type: $crc"; exit 1 ;;
-			esac
-
-			CHECK_TYPE_TEMP="$CHECK_TYPE_TEMP$SEP$crc"
-	done
-
-	# Remove the first character from $CHECK_TYPE_TEMP since it will
-	# always be the delimiter.
-	CHECK_TYPE="${CHECK_TYPE_TEMP:1}"
-
-	FILTER_LIST="lzma1$SEP"lzma2
-
-	# Build based on arguments
-	mkdir -p "$DEST_DIR"
-
-	# Generate configure option values
-	EXTRA_OPTIONS=""
-
-	case $BUILD_SYSTEM in
-	autotools)
-		cd "$SRC_DIR"
-
-		# Run autogen.sh script if not already run
-		if [ ! -f configure ]
-		then
-			./autogen.sh "$AUTOGEN_FLAGS"
-		fi
-
-		cd "$DEST_DIR"
-
-		add_to_filter_list "$BCJ" ",x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv"
-		add_to_filter_list "$DELTA" ",delta"
-
-		add_extra_option "$ENCODERS" "--enable-encoders=$FILTER_LIST" "--disable-encoders"
-		add_extra_option "$DECODERS" "--enable-decoders=$FILTER_LIST" "--disable-decoders"
-		add_extra_option "$THREADS" "" "--disable-threads"
-		add_extra_option "$SHARED" "" "--disable-shared"
-		add_extra_option "$NATIVE_LANG_SUPPORT" "" "--disable-nls"
-		add_extra_option "$SMALL" "--enable-small" ""
-		add_extra_option "$CLMUL" "" "--disable-clmul-crc"
-		add_extra_option "$SANDBOX" "" "--disable-sandbox"
-		add_extra_option "$DOXYGEN" "--enable-doxygen" ""
-
-		# Workaround a bug in too old config.guess. Version with
-		# timestamp='2022-05-08' would be needed but the autotools-dev
-		# package has 2022-01-09 in Ubuntu 22.04LTS and 24.04LTS. The
-		# bug breaks i386 assembler usage autodetection.
-		if "$SRC_DIR/build-aux/config.guess" | grep -q x86_64-pc-linux-gnux32
-		then
-			EXTRA_OPTIONS="$EXTRA_OPTIONS --build=i686-pc-linux-gnu"
-		fi
-
-		# Run configure script
-		"$SRC_DIR"/configure --enable-werror --enable-checks="$CHECK_TYPE" $EXTRA_OPTIONS --config-cache
-
-		# Build the project
-		make
-	;;
-	cmake)
-		cd "$DEST_DIR"
-
-		add_to_filter_list "$BCJ" ";x86;powerpc;ia64;arm;armthumb;arm64;sparc;riscv"
-		add_to_filter_list "$DELTA" ";delta"
-
-		add_extra_option "$THREADS" "-DXZ_THREADS=yes" "-DXZ_THREADS=no"
-
-		# Disable MicroLZMA if encoders are not configured.
-		add_extra_option "$ENCODERS" "-DXZ_ENCODERS=$FILTER_LIST" "-DXZ_ENCODERS= -DXZ_MICROLZMA_ENCODER=OFF"
-
-		# Disable MicroLZMA and lzip decoders if decoders are not configured.
-		add_extra_option "$DECODERS" "-DXZ_DECODERS=$FILTER_LIST" "-DXZ_DECODERS= -DXZ_MICROLZMA_DECODER=OFF -DXZ_LZIP_DECODER=OFF"
-
-		# CMake disables the shared library by default.
-		add_extra_option "$SHARED" "-DBUILD_SHARED_LIBS=ON" ""
-
-		add_extra_option "$NATIVE_LANG_SUPPORT" "" "-DXZ_NLS=OFF"
-		add_extra_option "$SMALL" "-DXZ_SMALL=ON" ""
-		add_extra_option "$DOXYGEN" "-DXZ_DOXYGEN=ON" ""
-
-		# Remove old cache file to clear previous settings.
-		rm -f "CMakeCache.txt"
-		cmake "$SRC_DIR/CMakeLists.txt" -B "$DEST_DIR" $EXTRA_OPTIONS -DXZ_CHECKS="$CHECK_TYPE" -G "Unix Makefiles"
-		cmake --build "$DEST_DIR"
-	;;
-	esac
-fi
-
-
-##############
-# Test Phase #
-##############
-
-if [ "$PHASE" = "all" ] || [ "$PHASE" = "test" ]
-then
-	case $BUILD_SYSTEM in
-	autotools)
-		cd "$DEST_DIR"
-		# If the tests fail, copy the test logs into the artifacts folder
-		if make check VERBOSE=1 LOG_COMPILER="$WRAPPER"
-		then
-			:
-		else
-			mkdir -p "$SRC_DIR/build-aux/artifacts/$ARTIFACTS_DIR_NAME"
-			cp ./tests/*.log "$SRC_DIR/build-aux/artifacts/$ARTIFACTS_DIR_NAME"
-			exit 1
-		fi
-	;;
-	cmake)
-		cd "$DEST_DIR"
-		if ${WRAPPER} make CTEST_OUTPUT_ON_FAILURE=1 test
-		then
-			:
-		else
-			mkdir -p "$SRC_DIR/build-aux/artifacts/$ARTIFACTS_DIR_NAME"
-			cp ./Testing/Temporary/*.log "$SRC_DIR/build-aux/artifacts/$ARTIFACTS_DIR_NAME"
-			exit 1
-		fi
-	;;
-	esac
-fi

build-aux/license-check.sh

@@ -1,177 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: 0BSD
-
-###############################################################################
-#
-# Look for missing license info in xz.git
-#
-# The project doesn't conform to the FSFE REUSE specification for now.
-# Instead, this script helps in finding files that lack license info.
-# Pass -v as an argument to get license info from all files in xz.git or,
-# when .git isn't available, from files extracted from a release tarball
-# (in case of a release tarball, the tree must be clean of any extra files).
-#
-# NOTE: This relies on non-POSIX xargs -0. It's supported on GNU and *BSDs.
-#
-###############################################################################
-#
-# Author: Lasse Collin
-#
-###############################################################################
-
-# Print good files too if -v is passed as an argument.
-VERBOSE=false
-case $1 in
-	'')
-		;;
-	-v)
-		VERBOSE=true
-		;;
-	*)
-		echo "Usage: $0 [-v]"
-		exit 1
-		;;
-esac
-
-
-# Use the C locale so that sorting is always the same.
-LC_ALL=C
-export LC_ALL
-
-
-# String to match the SPDX license identifier tag.
-# Spell it here in a way that doesn't match regular grep patterns.
-SPDX_LI='SPDX''-License-''Identifier'':'
-
-# Pattern for files that don't contain SPDX tags but they are under
-# a free license that isn't 0BSD.
-PAT_UNTAGGED_MISC='^COPYING\.
-^INSTALL\.generic$'
-
-# Pattern for files that are 0BSD but don't contain SPDX tags.
-# (The two file format specification files are public domain but
-# they can be treated as 0BSD too.)
-PAT_UNTAGGED_0BSD='^(.*/)?\.gitattributes$
-^(.*/)?\.gitignore$
-^\.github/SECURITY\.md$
-^AUTHORS$
-^COPYING$
-^ChangeLog$
-^INSTALL$
-^NEWS$
-^PACKAGERS$
-^(.*/)?README$
-^THANKS$
-^TODO$
-^(.*/)?[^/]+\.txt$
-^doc/SHA256SUMS$
-^po/LINGUAS$
-^src/common/w32_application\.manifest$
-^tests/xzgrep_expected_output$
-^tests/files/[^/]+\.(lz|lzma|xz)$'
-
-# Pattern for files that must be ignored when Git isn't available. This is
-# useful when this script is run right after extracting a release tarball.
-PAT_TARBALL_IGNORE='^(m4/)?[^/]*\.m4$
-^(.*/)?Makefile\.in(\.in)?$
-^(po|po4a)/.*[^.]..$
-^ABOUT-NLS$
-^build-aux/(config\..*|ltmain\.sh|[^.]*)$
-^config\.h\.in$
-^configure$'
-
-
-# Go to the top source dir.
-cd "$(dirname "$0")/.." || exit 1
-
-# Get the list of files to check from git if possible.
-# Otherwise list the whole source tree. This script should pass
-# if it is run right after extracting a release tarball.
-if test -d .git && type git > /dev/null 2>&1; then
-	FILES=$(git ls-files) || exit 1
-	IS_TARBALL=false
-else
-	FILES=$(find . -type f) || exit 1
-	FILES=$(printf '%s\n' "$FILES" | sed 's,^\./,,')
-	IS_TARBALL=true
-fi
-
-# Sort to keep the order consistent.
-FILES=$(printf '%s\n' "$FILES" | sort)
-
-
-# Find the tagged files.
-TAGGED=$(printf '%s\n' "$FILES" \
-	| tr '\n' '\000' | xargs -0r grep -l "$SPDX_LI" --)
-
-# Find the tagged 0BSD files.
-TAGGED_0BSD=$(printf '%s\n' "$TAGGED" \
-	| tr '\n' '\000' | xargs -0r grep -l "$SPDX_LI 0BSD" --)
-
-# Find the tagged non-0BSD files, that is, remove the 0BSD-tagged files
-# from the list of tagged files.
-TAGGED_MISC=$(printf '%s\n%s\n' "$TAGGED" "$TAGGED_0BSD" | sort | uniq -u)
-
-
-# Remove the tagged files from the list.
-FILES=$(printf '%s\n%s\n' "$FILES" "$TAGGED" | sort | uniq -u)
-
-# Find the intentionally-untagged files.
-UNTAGGED_0BSD=$(printf '%s\n' "$FILES" | grep -E "$PAT_UNTAGGED_0BSD")
-UNTAGGED_MISC=$(printf '%s\n' "$FILES" | grep -E "$PAT_UNTAGGED_MISC")
-
-# Remove the intentionally-untagged files from the list.
-FILES=$(printf '%s\n' "$FILES" | grep -Ev \
-	-e "$PAT_UNTAGGED_0BSD" -e "$PAT_UNTAGGED_MISC")
-
-
-# FIXME: Allow untagged translations if they have a public domain notice.
-# These are old translations that haven't been updated after 2024-02-14.
-# Eventually these should go away.
-PD_PO=$(printf '%s\n' "$FILES" | grep '\.po$' | tr '\n' '\000' \
-	| xargs -0r grep -Fl '# This file is put in the public domain.' --)
-
-if test -n "$PD_PO"; then
-	# Remove the public domain .po files from the list.
-	FILES=$(printf '%s\n%s\n' "$FILES" "$PD_PO" | sort | uniq -u)
-fi
-
-
-# Remove generated files from the list which don't have SPDX tags but which
-# can be present in release tarballs. This step is skipped when the file list
-# is from "git ls-files".
-GENERATED=
-if $IS_TARBALL; then
-	GENERATED=$(printf '%s\n' "$FILES" | grep -E "$PAT_TARBALL_IGNORE")
-	FILES=$(printf '%s\n' "$FILES" | grep -Ev "$PAT_TARBALL_IGNORE")
-fi
-
-
-if $VERBOSE; then
-	printf '# Tagged 0BSD files:\n%s\n\n' "$TAGGED_0BSD"
-	printf '# Intentionally untagged 0BSD:\n%s\n\n' "$UNTAGGED_0BSD"
-
-	# FIXME: Remove when no longer needed.
-	if test -n "$PD_PO"; then
-		printf '# Old public domain translations:\n%s\n\n' "$PD_PO"
-	fi
-
-	printf '# Tagged non-0BSD files:\n%s\n\n' "$TAGGED_MISC"
-	printf '# Intentionally untagged miscellaneous: \n%s\n\n' \
-		"$UNTAGGED_MISC"
-
-	if test -n "$GENERATED"; then
-		printf '# Generated files whose license was NOT checked:\n%s\n\n' \
-			"$GENERATED"
-	fi
-fi
-
-
-# Look for files with an unknown license and set the exit status accordingly.
-STATUS=0
-if test -n "$FILES"; then
-	printf '# ERROR: Licensing is unclear:\n%s\n' "$FILES"
-	STATUS=1
-fi
-
-exit "$STATUS"

build-aux/manconv.sh

@@ -1,56 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: 0BSD
-
-###############################################################################
-#
-# Wrapper for GNU groff to convert man pages to a few formats
-#
-# Usage: manconv.sh FORMAT [PAPER_SIZE] < in.1 > out.suffix
-#
-# FORMAT can be ascii, utf8, ps, or pdf. PAPER_SIZE can be anything that
-# groff accepts, e.g. a4 or letter. See groff_font(5). PAPER_SIZE defaults
-# to a4 and is used only when FORMAT is ps (PostScript) or pdf.
-#
-# Multiple man pages can be given at once e.g. to create a single PDF file
-# with continuous page numbering.
-#
-###############################################################################
-#
-# Author: Lasse Collin
-#
-###############################################################################
-
-FORMAT=$1
-PAPER=${2-a4}
-
-# Make PostScript and PDF output more readable:
-#   - Use 11 pt font instead of the default 10 pt.
-#   - Use larger paragraph spacing than the default 0.4v (man(7) only).
-FONT=11
-PD=0.8
-
-SED_PD="
-/^\\.TH /s/\$/\\
-.PD $PD/
-s/^\\.PD\$/.PD $PD/"
-
-case $FORMAT in
-	ascii)
-		groff -t -mandoc -Tascii -P-c | col -bx
-		;;
-	utf8)
-		groff -t -mandoc -Tutf8 -P-c | col -bx
-		;;
-	ps)
-		sed "$SED_PD" | groff -dpaper="$PAPER" -t -mandoc \
-				-rC1 -rS"$FONT" -Tps -P-p"$PAPER"
-		;;
-	pdf)
-		sed "$SED_PD" | groff -dpaper="$PAPER" -t -mandoc \
-				-rC1 -rS"$FONT" -Tps -P-p"$PAPER" | ps2pdf - -
-		;;
-	*)
-		echo 'Invalid arguments' >&2
-		exit 1
-		;;
-esac

build-aux/version.sh

@@ -1,21 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# Get the version string from version.h and print it out without
-# trailing newline. This makes it suitable for use in configure.ac.
-#
-#############################################################################
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-sed -n 's/LZMA_VERSION_STABILITY_ALPHA/alpha/
-	s/LZMA_VERSION_STABILITY_BETA/beta/
-	s/LZMA_VERSION_STABILITY_STABLE//
-	s/^#define LZMA_VERSION_[MPS][AIT][AJNT][A-Z]* //p' \
-	src/liblzma/api/lzma/version.h \
-	| sed 'N; N; N; s/\n/./; s/\n/./; s/\n//g' \
-	| tr -d '\012\015\025'

cmake/remove-ordinals.cmake

@@ -1,25 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# remove-ordinals.cmake
-#
-# Removes the ordinal numbers from a DEF file that has been created by
-# GNU ld or LLVM lld option --output-def (when creating a Windows DLL).
-# This should be equivalent: sed 's/ \+@ *[0-9]\+//'
-#
-# Usage:
-#
-#     cmake -DINPUT_FILE=infile.def.in \
-#           -DOUTPUT_FILE=outfile.def \
-#           -P remove-ordinals.cmake
-#
-#############################################################################
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-file(READ "${INPUT_FILE}" STR)
-string(REGEX REPLACE " +@ *[0-9]+" "" STR "${STR}")
-file(WRITE "${OUTPUT_FILE}" "${STR}")

cmake/tuklib_common.cmake

@@ -1,56 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_common.cmake - common functions and macros for tuklib_*.cmake files
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-function(tuklib_add_definitions TARGET_OR_ALL DEFINITIONS)
-    # DEFINITIONS may be an empty string/list but it's fine here. There is
-    # no need to quote ${DEFINITIONS} as empty arguments are fine here.
-    if(TARGET_OR_ALL STREQUAL "ALL")
-        add_compile_definitions(${DEFINITIONS})
-    else()
-        target_compile_definitions("${TARGET_OR_ALL}" PRIVATE ${DEFINITIONS})
-    endif()
-endfunction()
-
-function(tuklib_add_definition_if TARGET_OR_ALL VAR)
-    if(${VAR})
-        tuklib_add_definitions("${TARGET_OR_ALL}" "${VAR}")
-    endif()
-endfunction()
-
-# This is an over-simplified version of AC_USE_SYSTEM_EXTENSIONS in Autoconf
-# or gl_USE_SYSTEM_EXTENSIONS in gnulib.
-#
-# NOTE: This is a macro because the changes to CMAKE_REQUIRED_DEFINITIONS
-# must be visible in the calling scope.
-macro(tuklib_use_system_extensions)
-    if(NOT MSVC)
-        add_compile_definitions(
-            _GNU_SOURCE        # glibc, musl, mingw-w64
-            _NETBSD_SOURCE     # NetBSD, MINIX 3
-            _OPENBSD_SOURCE    # Also NetBSD!
-            __EXTENSIONS__     # Solaris
-            _POSIX_PTHREAD_SEMANTICS # Solaris
-            _DARWIN_C_SOURCE   # macOS
-            _TANDEM_SOURCE     # HP NonStop
-            _ALL_SOURCE        # AIX, z/OS
-        )
-
-        list(APPEND CMAKE_REQUIRED_DEFINITIONS
-            -D_GNU_SOURCE
-            -D_NETBSD_SOURCE
-            -D_OPENBSD_SOURCE
-            -D__EXTENSIONS__
-            -D_POSIX_PTHREAD_SEMANTICS
-            -D_DARWIN_C_SOURCE
-            -D_TANDEM_SOURCE
-            -D_ALL_SOURCE
-        )
-    endif()
-endmacro()

cmake/tuklib_cpucores.cmake

@@ -1,184 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_cpucores.cmake - see tuklib_cpucores.m4 for description and comments
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(CMakePushCheckState)
-include(CheckCSourceCompiles)
-include(CheckIncludeFile)
-
-function(tuklib_cpucores_internal_check)
-    if(WIN32 OR CYGWIN)
-        # Nothing to do, the tuklib_cpucores.c handles it.
-        set(TUKLIB_CPUCORES_DEFINITIONS "" CACHE INTERNAL "")
-        return()
-    endif()
-
-    # glibc-based systems (GNU/Linux and GNU/kFreeBSD) have
-    # sched_getaffinity(). The CPU_COUNT() macro was added in glibc 2.9.
-    # glibc 2.9 is old enough that if someone uses the code on older glibc,
-    # the fallback to sysconf() should be good enough.
-    #
-    # NOTE: This required that _GNU_SOURCE is defined. We assume that whatever
-    #       feature test macros the caller wants to use are already set in
-    #       CMAKE_REQUIRED_DEFINES and in the target defines.
-    check_c_source_compiles("
-            #include <sched.h>
-            int main(void)
-            {
-                cpu_set_t cpu_mask;
-                sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask);
-                return CPU_COUNT(&cpu_mask);
-            }
-        "
-        TUKLIB_CPUCORES_SCHED_GETAFFINITY)
-    if(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
-        set(TUKLIB_CPUCORES_DEFINITIONS
-            "TUKLIB_CPUCORES_SCHED_GETAFFINITY"
-            CACHE INTERNAL "")
-        return()
-    endif()
-
-    # FreeBSD has both cpuset and sysctl. Look for cpuset first because
-    # it's a better approach.
-    #
-    # This test would match on GNU/kFreeBSD too but it would require
-    # -lfreebsd-glue when linking and thus in the current form this would
-    # fail on GNU/kFreeBSD. The above test for sched_getaffinity() matches
-    # on GNU/kFreeBSD so the test below should never run on that OS.
-    check_c_source_compiles("
-            #include <sys/param.h>
-            #include <sys/cpuset.h>
-            int main(void)
-            {
-                cpuset_t set;
-                cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
-                                   sizeof(set), &set);
-                return 0;
-            }
-        "
-        TUKLIB_CPUCORES_CPUSET)
-    if(TUKLIB_CPUCORES_CPUSET)
-        set(TUKLIB_CPUCORES_DEFINITIONS "HAVE_PARAM_H;TUKLIB_CPUCORES_CPUSET"
-            CACHE INTERNAL "")
-        return()
-    endif()
-
-    # On OS/2, both sysconf() and sysctl() pass the tests in this file,
-    # but only sysctl() works. On QNX it's the opposite: only sysconf() works
-    # (although it assumes that _POSIX_SOURCE, _XOPEN_SOURCE, and
-    # _POSIX_C_SOURCE are undefined or alternatively _QNX_SOURCE is defined).
-    #
-    # We test sysctl() first and intentionally break the sysctl() test on QNX
-    # so that sysctl() is never used on QNX.
-    cmake_push_check_state()
-    check_include_file(sys/param.h HAVE_SYS_PARAM_H)
-    if(HAVE_SYS_PARAM_H)
-        list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_PARAM_H)
-    endif()
-    check_c_source_compiles("
-            #ifdef __QNX__
-            compile error
-            #endif
-            #ifdef HAVE_SYS_PARAM_H
-            #   include <sys/param.h>
-            #endif
-            #include <sys/sysctl.h>
-            int main(void)
-            {
-            #ifdef HW_NCPUONLINE
-                /* This is preferred on OpenBSD, see tuklib_cpucores.c. */
-                int name[2] = { CTL_HW, HW_NCPUONLINE };
-            #else
-                int name[2] = { CTL_HW, HW_NCPU };
-            #endif
-                int cpus;
-                size_t cpus_size = sizeof(cpus);
-                sysctl(name, 2, &cpus, &cpus_size, NULL, 0);
-                return 0;
-            }
-        "
-        TUKLIB_CPUCORES_SYSCTL)
-    cmake_pop_check_state()
-    if(TUKLIB_CPUCORES_SYSCTL)
-        if(HAVE_SYS_PARAM_H)
-            set(TUKLIB_CPUCORES_DEFINITIONS
-                "HAVE_PARAM_H;TUKLIB_CPUCORES_SYSCTL"
-                CACHE INTERNAL "")
-        else()
-            set(TUKLIB_CPUCORES_DEFINITIONS
-                "TUKLIB_CPUCORES_SYSCTL"
-                CACHE INTERNAL "")
-        endif()
-        return()
-    endif()
-
-    # Many platforms support sysconf().
-    check_c_source_compiles("
-            #include <unistd.h>
-            int main(void)
-            {
-                long i;
-            #ifdef _SC_NPROCESSORS_ONLN
-                /* Many systems using sysconf() */
-                i = sysconf(_SC_NPROCESSORS_ONLN);
-            #else
-                /* IRIX */
-                i = sysconf(_SC_NPROC_ONLN);
-            #endif
-                return 0;
-            }
-        "
-        TUKLIB_CPUCORES_SYSCONF)
-    if(TUKLIB_CPUCORES_SYSCONF)
-        set(TUKLIB_CPUCORES_DEFINITIONS "TUKLIB_CPUCORES_SYSCONF"
-            CACHE INTERNAL "")
-        return()
-    endif()
-
-    # HP-UX
-    check_c_source_compiles("
-            #include <sys/param.h>
-            #include <sys/pstat.h>
-            int main(void)
-            {
-                struct pst_dynamic pst;
-                pstat_getdynamic(&pst, sizeof(pst), 1, 0);
-                (void)pst.psd_proc_cnt;
-                return 0;
-            }
-        "
-        TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
-    if(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
-        set(TUKLIB_CPUCORES_DEFINITIONS "TUKLIB_CPUCORES_PSTAT_GETDYNAMIC"
-            CACHE INTERNAL "")
-        return()
-    endif()
-endfunction()
-
-function(tuklib_cpucores TARGET_OR_ALL)
-    if(NOT DEFINED TUKLIB_CPUCORES_FOUND)
-        message(STATUS
-                "Checking how to detect the number of available CPU cores")
-        tuklib_cpucores_internal_check()
-
-        if(DEFINED TUKLIB_CPUCORES_DEFINITIONS)
-            set(TUKLIB_CPUCORES_FOUND 1 CACHE INTERNAL "")
-        else()
-            set(TUKLIB_CPUCORES_FOUND 0 CACHE INTERNAL "")
-            message(WARNING
-                    "No method to detect the number of CPU cores was found")
-        endif()
-    endif()
-
-    if(TUKLIB_CPUCORES_FOUND)
-        tuklib_add_definitions("${TARGET_OR_ALL}"
-                               "${TUKLIB_CPUCORES_DEFINITIONS}")
-    endif()
-endfunction()

cmake/tuklib_integer.cmake

@@ -1,288 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_integer.cmake - see tuklib_integer.m4 for description and comments
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(TestBigEndian)
-include(CheckCSourceCompiles)
-include(CheckIncludeFile)
-include(CheckSymbolExists)
-
-# An internal helper for tuklib_integer that attempts to detect if
-# -mstrict-align or -mno-strict-align is in effect. This sets the
-# cache variable TUKLIB_INTEGER_STRICT_ALIGN to ON if OBJDUMP_REGEX
-# matches the objdump output of a check program. Otherwise it is set to OFF.
-function(tuklib_integer_internal_strict_align OBJDUMP_REGEX)
-    if(NOT DEFINED TUKLIB_INTEGER_STRICT_ALIGN)
-        # Build a static library because then the function won't be optimized
-        # away, and there won't be any unrelated startup code either.
-        set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
-
-        # CMake >= 3.25 wouldn't require us to create a temporary file,
-        # but the following method is compatible with 3.20.
-        file(WRITE "${CMAKE_BINARY_DIR}/tuklib_integer_strict_align.c" "
-                #include <string.h>
-                unsigned int check_strict_align(const void *p)
-                {
-                    unsigned int i;
-                    memcpy(&i, p, sizeof(i));
-                    return i;
-                }
-            ")
-
-        # Force -O2 because memcpy() won't be optimized out if optimizations
-        # are disabled.
-        try_compile(
-            TRY_COMPILE_RESULT
-            "${CMAKE_BINARY_DIR}"
-            "${CMAKE_BINARY_DIR}/tuklib_integer_strict_align.c"
-            COMPILE_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}"
-            CMAKE_FLAGS "-DCOMPILE_DEFINITIONS=${CMAKE_REQUIRED_FLAGS} -O2"
-            COPY_FILE "${CMAKE_BINARY_DIR}/tuklib_integer_strict_align.a"
-        )
-
-        if(NOT TRY_COMPILE_RESULT)
-            message(FATAL_ERROR
-                    "Compilation of the strict align check failed. "
-                    "Either the specified compiler flags are broken "
-                    "or ${CMAKE_CURRENT_FUNCTION_LIST_FILE} has a bug.")
-        endif()
-
-        # Use WORKING_DIRECTORY instead of passing the full path to objdump.
-        # This ensures that the pathname won't affect the objdump output,
-        # which could result in an unwanted regex match in the next step.
-        execute_process(
-            COMMAND "${CMAKE_OBJDUMP}" -d "tuklib_integer_strict_align.a"
-            WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
-            OUTPUT_VARIABLE OBJDUMP_OUTPUT
-            RESULT_VARIABLE OBJDUMP_RESULT
-        )
-
-        # FIXME? Should we remove the temporary files here?
-
-        # Look for instructions that load unsigned bytes. If none are found,
-        # assume that -mno-strict-align is in effect.
-        if(OBJDUMP_RESULT STREQUAL "0" AND
-                OBJDUMP_OUTPUT MATCHES "${OBJDUMP_REGEX}")
-            set(TUKLIB_INTEGER_STRICT_ALIGN ON CACHE INTERNAL "")
-        else()
-            set(TUKLIB_INTEGER_STRICT_ALIGN OFF CACHE INTERNAL "")
-        endif()
-    endif()
-endfunction()
-
-function(tuklib_integer TARGET_OR_ALL)
-    # Check for endianness. Unlike the Autoconf's AC_C_BIGENDIAN, this doesn't
-    # support Apple universal binaries. The CMake module will leave the
-    # variable unset so we can catch that situation here instead of continuing
-    # as if we were little endian.
-    test_big_endian(WORDS_BIGENDIAN)
-    if(NOT DEFINED WORDS_BIGENDIAN)
-        message(FATAL_ERROR "Cannot determine endianness")
-    endif()
-    tuklib_add_definition_if("${TARGET_OR_ALL}" WORDS_BIGENDIAN)
-
-    # Look for a byteswapping method.
-    check_c_source_compiles("
-            int main(void)
-            {
-                __builtin_bswap16(1);
-                __builtin_bswap32(1);
-                __builtin_bswap64(1);
-                return 0;
-            }
-        "
-        HAVE___BUILTIN_BSWAPXX)
-    if(HAVE___BUILTIN_BSWAPXX)
-        tuklib_add_definitions("${TARGET_OR_ALL}" HAVE___BUILTIN_BSWAPXX)
-    else()
-        check_include_file(byteswap.h HAVE_BYTESWAP_H)
-        if(HAVE_BYTESWAP_H)
-            tuklib_add_definitions("${TARGET_OR_ALL}" HAVE_BYTESWAP_H)
-            check_symbol_exists(bswap_16 byteswap.h HAVE_BSWAP_16)
-            tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_BSWAP_16)
-            check_symbol_exists(bswap_32 byteswap.h HAVE_BSWAP_32)
-            tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_BSWAP_32)
-            check_symbol_exists(bswap_64 byteswap.h HAVE_BSWAP_64)
-            tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_BSWAP_64)
-        else()
-            check_include_file(sys/endian.h HAVE_SYS_ENDIAN_H)
-            if(HAVE_SYS_ENDIAN_H)
-                tuklib_add_definitions("${TARGET_OR_ALL}" HAVE_SYS_ENDIAN_H)
-            else()
-                check_include_file(sys/byteorder.h HAVE_SYS_BYTEORDER_H)
-                tuklib_add_definition_if("${TARGET_OR_ALL}"
-                                         HAVE_SYS_BYTEORDER_H)
-            endif()
-        endif()
-    endif()
-
-    # Autodetect if unaligned memory access is fast when the cache variable
-    # TUKLIB_FAST_UNALIGNED_ACCESS isn't set. The result is stored in
-    # FAST_UNALIGNED_GUESS. Assume that unaligned access shouldn't be used.
-    # Initialize the variable here so that it's never undefined in the
-    # option() command after the if()...endif() block.
-    set(FAST_UNALIGNED_GUESS OFF)
-    if(NOT DEFINED TUKLIB_FAST_UNALIGNED_ACCESS)
-        message(CHECK_START "Check if unaligned memory access should be used")
-
-        # Guess that unaligned access is fast on these archs:
-        #   - 32/64-bit x86 / x86-64
-        #   - 32/64-bit big endian PowerPC
-        #   - 64-bit little endian PowerPC
-        #   - 32/64-bit Loongarch (*)
-        #   - Some 32-bit ARM
-        #   - Some 64-bit ARM64 (AArch64)
-        #   - Some 32/64-bit RISC-V
-        #
-        # (*) See sections 7.4, 8.1, and 8.2:
-        #     https://github.com/loongson/la-softdev-convention/blob/v0.2/la-softdev-convention.adoc
-        #
-        #     That is, desktop and server processors likely support
-        #     unaligned access in hardware but embedded processors
-        #     might not. GCC defaults to -mno-strict-align and so
-        #     do majority of GNU/Linux distributions. As of
-        #     GCC 15.2, there is no predefined macro to detect
-        #     if -mstrict-align or -mno-strict-align is in effect.
-        #     We use heuristics based on compiler output.
-        #
-        # CMake < 4.1 doesn't provide a standardized/normalized list of arch
-        # names. For example, x86-64 may be "x86_64" (Linux),
-        # "AMD64" (Windows), or even "EM64T" (64-bit WinXP).
-        string(TOLOWER "${CMAKE_SYSTEM_PROCESSOR}" PROCESSOR)
-
-        # CMake 4.1 made CMAKE_<LANG>_COMPILER_ARCHITECTURE_ID useful on many
-        # targets. In earlier versions it's still useful with MSVC with which
-        # CMAKE_SYSTEM_PROCESSOR can refer to the build machine.
-        if(NOT CMAKE_C_COMPILER_ARCHITECTURE_ID STREQUAL "")
-            # CMake 4.2.0 docs say that the list typically has only one entry
-            # except possibly on macOS. On macOS, most (all?) archs support
-            # unaligned access. Just pick the first one from the list.
-            list(GET CMAKE_C_COMPILER_ARCHITECTURE_ID 0 PROCESSOR)
-            string(TOLOWER "${PROCESSOR}" PROCESSOR)
-        endif()
-
-        # There is no ^ in the first regex branch to allow "i" at
-        # the beginning so it can match "i386" to "i786", and "x86_64".
-        if(PROCESSOR MATCHES "[x34567]86|^x64|^amd64|^em64t")
-            set(FAST_UNALIGNED_GUESS ON)
-
-        elseif(PROCESSOR MATCHES "^powerpc|^ppc")
-            if(WORDS_BIGENDIAN OR PROCESSOR MATCHES "64")
-                set(FAST_UNALIGNED_GUESS ON)
-            endif()
-
-        elseif(PROCESSOR MATCHES "^arm|^riscv" AND
-                NOT PROCESSOR MATCHES "^arm64")
-            # On 32-bit ARM, GCC and Clang # #define __ARM_FEATURE_UNALIGNED
-            # if and only if unaligned access is supported.
-            #
-            # RISC-V C API Specification says that if
-            # __riscv_misaligned_fast is defined then
-            # unaligned access is known to be fast.
-            #
-            # MSVC is handled as a special case: We assume that
-            # 32-bit ARM supports fast unaligned access.
-            # If MSVC gets RISC-V support then this will assume
-            # fast unaligned access on RISC-V too.
-            check_c_source_compiles("
-                    #if !defined(__ARM_FEATURE_UNALIGNED) \
-                            && !defined(__riscv_misaligned_fast) \
-                            && !defined(_MSC_VER)
-                    compile error
-                    #endif
-                    int main(void) { return 0; }
-                "
-                TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
-            if(TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
-                set(FAST_UNALIGNED_GUESS ON)
-            endif()
-
-        elseif(PROCESSOR MATCHES "^aarch64|^arm64")
-            # On ARM64, Clang defines __ARM_FEATURE_UNALIGNED if and only if
-            # unaligned access is supported. However, GCC (at least up to 15.2.0)
-            # defines it even when using -mstrict-align, so autodetection with
-            # this macro doesn't work with GCC on ARM64. (It does work on
-            # 32-bit ARM.) See:
-            #
-            #     https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111555
-            #
-            # We need three checks:
-            #
-            # 1. If __ARM_FEATURE_UNALIGNED is defined and the
-            #    compiler isn't GCC, unaligned access is enabled.
-            #    If the compiler is MSVC, unaligned access is
-            #    enabled even without __ARM_FEATURE_UNALIGNED.
-            check_c_source_compiles("
-                    #if defined(__ARM_FEATURE_UNALIGNED) \
-                            && (!defined(__GNUC__) || defined(__clang__))
-                    #elif defined(_MSC_VER)
-                    #else
-                    compile error
-                    #endif
-                    int main(void) { return 0; }
-                "
-                TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
-            if(TUKLIB_FAST_UNALIGNED_DEFINED_BY_PREPROCESSOR)
-                set(FAST_UNALIGNED_GUESS ON)
-            else()
-                # 2. If __ARM_FEATURE_UNALIGNED is not defined,
-                #    unaligned access is disabled.
-                check_c_source_compiles("
-                        #ifdef __ARM_FEATURE_UNALIGNED
-                        compile error
-                        #endif
-                        int main(void) { return 0; }
-                    "
-                    TUKLIB_FAST_UNALIGNED_NOT_DEFINED_BY_PREPROCESSOR)
-                if(NOT TUKLIB_FAST_UNALIGNED_NOT_DEFINED_BY_PREPROCESSOR)
-                    # 3. Use heuristics to detect if -mstrict-align is
-                    #    in effect when building with GCC.
-                    tuklib_integer_internal_strict_align("[ \t]ldrb[ \t]")
-                    if(NOT TUKLIB_INTEGER_STRICT_ALIGN)
-                        set(FAST_UNALIGNED_GUESS ON)
-                    endif()
-                endif()
-            endif()
-
-        elseif(PROCESSOR MATCHES "^loongarch")
-            tuklib_integer_internal_strict_align("[ \t]ld\\.bu[ \t]")
-            if(NOT TUKLIB_INTEGER_STRICT_ALIGN)
-                set(FAST_UNALIGNED_GUESS ON)
-            endif()
-        endif()
-
-        if(FAST_UNALIGNED_GUESS)
-            message(CHECK_PASS "yes")
-        else()
-            message(CHECK_PASS "no")
-        endif()
-    endif()
-
-    option(TUKLIB_FAST_UNALIGNED_ACCESS
-           "Enable if the system supports *fast* unaligned memory access \
-with 16-bit, 32-bit, and 64-bit integers."
-           "${FAST_UNALIGNED_GUESS}")
-    tuklib_add_definition_if("${TARGET_OR_ALL}" TUKLIB_FAST_UNALIGNED_ACCESS)
-
-    # Unsafe type punning:
-    option(TUKLIB_USE_UNSAFE_TYPE_PUNNING
-           "This introduces strict aliasing violations and \
-may result in broken code. However, this might improve performance \
-in some cases, especially with old compilers \
-(e.g. GCC 3 and early 4.x on x86, GCC < 6 on ARMv6 and ARMv7)."
-           OFF)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" TUKLIB_USE_UNSAFE_TYPE_PUNNING)
-
-    # Check for GCC/Clang __builtin_assume_aligned().
-    check_c_source_compiles(
-        "int main(void) { __builtin_assume_aligned(\"\", 1); return 0; }"
-        HAVE___BUILTIN_ASSUME_ALIGNED)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE___BUILTIN_ASSUME_ALIGNED)
-endfunction()

cmake/tuklib_large_file_support.cmake

@@ -1,54 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_large_file_support.cmake
-#
-# If off_t is less than 64 bits by default and -D_FILE_OFFSET_BITS=64
-# makes off_t become 64-bit, the CMake option LARGE_FILE_SUPPORT is
-# provided (ON by default) and -D_FILE_OFFSET_BITS=64 is added to
-# the compile definitions if LARGE_FILE_SUPPORT is ON.
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(CMakePushCheckState)
-include(CheckCSourceCompiles)
-
-function(tuklib_large_file_support TARGET_OR_ALL)
-    # MSVC must be handled specially in the C code.
-    if(MSVC)
-        return()
-    endif()
-
-    set(TUKLIB_LARGE_FILE_SUPPORT_TEST
-            "#include <sys/types.h>
-            int foo[sizeof(off_t) >= 8 ? 1 : -1];
-            int main(void) { return 0; }")
-
-    check_c_source_compiles("${TUKLIB_LARGE_FILE_SUPPORT_TEST}"
-                            TUKLIB_LARGE_FILE_SUPPORT_BY_DEFAULT)
-
-    if(NOT TUKLIB_LARGE_FILE_SUPPORT_BY_DEFAULT)
-        cmake_push_check_state()
-        # This needs -D.
-        list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_FILE_OFFSET_BITS=64")
-        check_c_source_compiles("${TUKLIB_LARGE_FILE_SUPPORT_TEST}"
-                                TUKLIB_LARGE_FILE_SUPPORT_WITH_FOB64)
-        cmake_pop_check_state()
-    endif()
-
-    if(TUKLIB_LARGE_FILE_SUPPORT_WITH_FOB64)
-        # Show the option only when _FILE_OFFSET_BITS=64 affects sizeof(off_t).
-        option(LARGE_FILE_SUPPORT
-               "Use -D_FILE_OFFSET_BITS=64 to support files larger than 2 GiB."
-               ON)
-
-        if(LARGE_FILE_SUPPORT)
-            # This must not use -D.
-            tuklib_add_definitions("${TARGET_OR_ALL}" "_FILE_OFFSET_BITS=64")
-        endif()
-    endif()
-endfunction()

cmake/tuklib_mbstr.cmake

@@ -1,25 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_mbstr.cmake - see tuklib_mbstr.m4 for description and comments
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(CheckSymbolExists)
-
-function(tuklib_mbstr TARGET_OR_ALL)
-    check_symbol_exists(mbrtowc wchar.h HAVE_MBRTOWC)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_MBRTOWC)
-
-    # NOTE: wcwidth() requires _GNU_SOURCE or _XOPEN_SOURCE on GNU/Linux.
-    check_symbol_exists(wcwidth wchar.h HAVE_WCWIDTH)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_WCWIDTH)
-
-    # NOTE: vasprintf() requires _GNU_SOURCE on GNU/Linux.
-    check_symbol_exists(vasprintf stdio.h HAVE_VASPRINTF)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_VASPRINTF)
-endfunction()

cmake/tuklib_physmem.cmake

@@ -1,153 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_physmem.cmake - see tuklib_physmem.m4 for description and comments
-#
-# NOTE: Compared tuklib_physmem.m4, this lacks support for Tru64, IRIX, and
-# Linux sysinfo() (usually sysconf() is used on GNU/Linux).
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(CMakePushCheckState)
-include(CheckCSourceCompiles)
-include(CheckIncludeFile)
-
-function(tuklib_physmem_internal_check)
-    # Shortcut on Windows:
-    if(WIN32 OR CYGWIN)
-        # Nothing to do, the tuklib_physmem.c handles it.
-        set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
-        return()
-    endif()
-
-    # Full check for special cases:
-    check_c_source_compiles("
-            #if defined(_WIN32) || defined(__CYGWIN__) || defined(__OS2__) \
-                || defined(__DJGPP__) || defined(__VMS) \
-                || defined(AMIGA) || defined(__AROS__) || defined(__QNX__)
-            int main(void) { return 0; }
-            #else
-            compile error
-            #endif
-        "
-        TUKLIB_PHYSMEM_SPECIAL)
-    if(TUKLIB_PHYSMEM_SPECIAL)
-        # Nothing to do, the tuklib_physmem.c handles it.
-        set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
-        return()
-    endif()
-
-    # Look for AIX-specific solution before sysconf(), because the test
-    # for sysconf() will pass on AIX but won't actually work
-    # (sysconf(_SC_PHYS_PAGES) compiles but always returns -1 on AIX).
-    check_c_source_compiles("
-            #include <sys/systemcfg.h>
-            int main(void)
-            {
-                (void)_system_configuration.physmem;
-                return 0;
-            }
-        "
-        TUKLIB_PHYSMEM_AIX)
-    if(TUKLIB_PHYSMEM_AIX)
-        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_AIX" CACHE INTERNAL "")
-        return()
-    endif()
-
-    # sysconf()
-    check_c_source_compiles("
-            #include <unistd.h>
-            int main(void)
-            {
-                long i;
-                i = sysconf(_SC_PAGESIZE);
-                i = sysconf(_SC_PHYS_PAGES);
-                return 0;
-            }
-        "
-        TUKLIB_PHYSMEM_SYSCONF)
-    if(TUKLIB_PHYSMEM_SYSCONF)
-        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_SYSCONF"
-            CACHE INTERNAL "")
-        return()
-    endif()
-
-    # sysctl()
-    cmake_push_check_state()
-    check_include_file(sys/param.h HAVE_SYS_PARAM_H)
-    if(HAVE_SYS_PARAM_H)
-        list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_PARAM_H)
-    endif()
-    check_c_source_compiles("
-            #ifdef HAVE_SYS_PARAM_H
-            #   include <sys/param.h>
-            #endif
-            #include <sys/sysctl.h>
-            int main(void)
-            {
-                int name[2] = { CTL_HW, HW_PHYSMEM };
-                unsigned long mem;
-                size_t mem_ptr_size = sizeof(mem);
-                sysctl(name, 2, &mem, &mem_ptr_size, NULL, 0);
-                return 0;
-            }
-        "
-        TUKLIB_PHYSMEM_SYSCTL)
-    cmake_pop_check_state()
-    if(TUKLIB_PHYSMEM_SYSCTL)
-        if(HAVE_SYS_PARAM_H)
-            set(TUKLIB_PHYSMEM_DEFINITIONS
-                "HAVE_PARAM_H;TUKLIB_PHYSMEM_SYSCTL"
-                CACHE INTERNAL "")
-        else()
-            set(TUKLIB_PHYSMEM_DEFINITIONS
-                "TUKLIB_PHYSMEM_SYSCTL"
-                CACHE INTERNAL "")
-        endif()
-        return()
-    endif()
-
-    # HP-UX
-    check_c_source_compiles("
-            #include <sys/param.h>
-            #include <sys/pstat.h>
-            int main(void)
-            {
-                struct pst_static pst;
-                pstat_getstatic(&pst, sizeof(pst), 1, 0);
-                (void)pst.physical_memory;
-                (void)pst.page_size;
-                return 0;
-            }
-        "
-        TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
-    if(TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
-        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_PSTAT_GETSTATIC"
-            CACHE INTERNAL "")
-        return()
-    endif()
-endfunction()
-
-function(tuklib_physmem TARGET_OR_ALL)
-    if(NOT DEFINED TUKLIB_PHYSMEM_FOUND)
-        message(STATUS "Checking how to detect the amount of physical memory")
-        tuklib_physmem_internal_check()
-
-        if(DEFINED TUKLIB_PHYSMEM_DEFINITIONS)
-            set(TUKLIB_PHYSMEM_FOUND 1 CACHE INTERNAL "")
-        else()
-            set(TUKLIB_PHYSMEM_FOUND 0 CACHE INTERNAL "")
-            message(WARNING
-                "No method to detect the amount of physical memory was found")
-        endif()
-    endif()
-
-    if(TUKLIB_PHYSMEM_FOUND)
-        tuklib_add_definitions("${TARGET_OR_ALL}"
-                               "${TUKLIB_PHYSMEM_DEFINITIONS}")
-    endif()
-endfunction()

cmake/tuklib_progname.cmake

@@ -1,19 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# tuklib_progname.cmake - see tuklib_progname.m4 for description and comments
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
-include(CheckSymbolExists)
-
-function(tuklib_progname TARGET_OR_ALL)
-    # NOTE: This glibc extension requires _GNU_SOURCE.
-    check_symbol_exists(program_invocation_name errno.h
-                        HAVE_PROGRAM_INVOCATION_NAME)
-    tuklib_add_definition_if("${TARGET_OR_ALL}" HAVE_PROGRAM_INVOCATION_NAME)
-endfunction()

debug/Makefile.am

@@ -1,8 +1,16 @@
-## SPDX-License-Identifier: 0BSD
+##
-## Author: Lasse Collin
+##  Copyright (C) 2008 Lasse Collin
-
+##
-EXTRA_DIST = \
+##  This library is free software; you can redistribute it and/or
-	translation.bash
+##  modify it under the terms of the GNU Lesser General Public
+##  License as published by the Free Software Foundation; either
+##  version 2.1 of the License, or (at your option) any later version.
+##
+##  This library is distributed in the hope that it will be useful,
+##  but WITHOUT ANY WARRANTY; without even the implied warranty of
+##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+##  Lesser General Public License for more details.
+##
 
 noinst_PROGRAMS = \
 	repeat \
@@ -11,17 +19,18 @@ noinst_PROGRAMS = \
 	memusage \
 	crc32 \
 	known_sizes \
-	hex2bin \
+	hex2bin
-	testfilegen-arm64
 
 AM_CPPFLAGS = \
-	-I$(top_srcdir)/src/common \
+	-I@top_srcdir@/src/common \
-	-I$(top_srcdir)/src/liblzma/api
+	-I@top_srcdir@/src/liblzma/api
 
-LDADD = $(top_builddir)/src/liblzma/liblzma.la
+AM_LDFLAGS = -static
+
+LDADD = \
+	@top_builddir@/src/liblzma/liblzma.la \
+	@LTLIBINTL@
 
 if COND_GNULIB
-LDADD += $(top_builddir)/lib/libgnu.a
+LDADD += @top_builddir@/lib/libgnu.a
 endif
-
-LDADD += $(LTLIBINTL)

debug/README

@@ -3,7 +3,7 @@ Debug tools
 -----------
 
     This directory contains a few tiny programs that may be helpful when
-    debugging XZ Utils.
+    debugging LZMA Utils.
 
     These tools are not meant to be installed. Often one needs to edit
     the source code a little to make the programs do the wanted things.

debug/crc32.c

@@ -1,16 +1,23 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       crc32.c
 /// \brief      Primitive CRC32 calculation tool
 //
-//  Author:     Lasse Collin
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"
-#include "lzma.h"
 #include <stdio.h>
 
 

debug/full_flush.c

@@ -1,20 +1,25 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       full_flush.c
 /// \brief      Encode files using LZMA_FULL_FLUSH
 //
-//  Author:     Lasse Collin
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"
-#include "lzma.h"
 #include <stdio.h>
 
-#define CHUNK 64
-
 
 static lzma_stream strm = LZMA_STREAM_INIT;
 static FILE *file_in;
@@ -23,13 +28,14 @@ static FILE *file_in;
 static void
 encode(size_t size, lzma_action action)
 {
+	static const size_t CHUNK = 64;
 	uint8_t in[CHUNK];
 	uint8_t out[CHUNK];
 	lzma_ret ret;
 
 	do {
 		if (strm.avail_in == 0 && size > 0) {
-			const size_t amount = my_min(size, CHUNK);
+			const size_t amount = MIN(size, CHUNK);
 			strm.avail_in = fread(in, 1, amount, file_in);
 			strm.next_in = in;
 			size -= amount; // Intentionally not using avail_in.
@@ -62,22 +68,19 @@ encode(size_t size, lzma_action action)
 int
 main(int argc, char **argv)
 {
+	lzma_init_encoder();
+
 	file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
 
 
 	// Config
-	lzma_options_lzma opt_lzma;
+	lzma_filter filters[LZMA_BLOCK_FILTERS_MAX + 1];
-	if (lzma_lzma_preset(&opt_lzma, 1)) {
-		fprintf(stderr, "preset failed\n");
-		exit(1);
-	}
-	lzma_filter filters[LZMA_FILTERS_MAX + 1];
 	filters[0].id = LZMA_FILTER_LZMA2;
-	filters[0].options = &opt_lzma;
+	filters[0].options = (void *)&lzma_preset_lzma[0];
-	filters[1].id = LZMA_VLI_UNKNOWN;
+	filters[1].id = LZMA_VLI_VALUE_UNKNOWN;
 
 	// Init
-	if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) {
+	if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_SHA256) != LZMA_OK) {
 		fprintf(stderr, "init failed\n");
 		exit(1);
 	}

debug/hex2bin.c

@@ -1,11 +1,13 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       hex2bin.c
 /// \brief      Converts hexadecimal input strings to binary
 //
-//  Author:     Lasse Collin
+//  This code has been put into the public domain.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 //
 ///////////////////////////////////////////////////////////////////////////////
 

debug/known_sizes.c

@@ -1,5 +1,3 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       known_sizes.c
@@ -9,12 +7,21 @@
 /// and/or Uncompressed Size values are stored in the Block Header.
 /// As of writing there's no such Stream encoder in liblzma.
 //
-//  Author:     Lasse Collin
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"
-#include "lzma.h"
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/unistd.h>
@@ -40,17 +47,13 @@ main(void)
 	const size_t in_size = fread(in, 1, BUFFER_SIZE, stdin);
 
 	// Filter setup
-	lzma_options_lzma opt_lzma;
-	if (lzma_lzma_preset(&opt_lzma, 1))
-		return 1;
-
 	lzma_filter filters[] = {
 		{
 			.id = LZMA_FILTER_LZMA2,
-			.options = &opt_lzma
+			.options = (void *)(&lzma_preset_lzma[0])
 		},
 		{
-			.id = LZMA_VLI_UNKNOWN
+			.id = LZMA_VLI_VALUE_UNKNOWN
 		}
 	};
 
@@ -61,15 +64,19 @@ main(void)
 		.filters = filters,
 	};
 
+	// FIXME Insane paranoia in liblzma.
+	if (lzma_block_header_size(&block) != LZMA_OK)
+		return 1;
+
+	// We don't actually know the compressed size, so don't tell it to
+	// Block encoder.
+	block.compressed_size = LZMA_VLI_VALUE_UNKNOWN;
+
 	lzma_stream strm = LZMA_STREAM_INIT;
 	if (lzma_block_encoder(&strm, &block) != LZMA_OK)
 		return 1;
 
-	// Reserve space for Stream Header and Block Header. We need to
+	// Reserve space for Stream Header and Block Header.
-	// calculate the size of the Block Header first.
-	if (lzma_block_header_size(&block) != LZMA_OK)
-		return 1;
-
 	size_t out_size = LZMA_STREAM_HEADER_SIZE + block.header_size;
 
 	strm.next_in = in;
@@ -86,7 +93,7 @@ main(void)
 			!= LZMA_OK)
 		return 1;
 
-	lzma_index *idx = lzma_index_init(NULL);
+	lzma_index *idx = lzma_index_init(NULL, NULL);
 	if (idx == NULL)
 		return 1;
 

debug/memusage.c

@@ -1,50 +1,57 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       memusage.c
 /// \brief      Calculates memory usage using lzma_memory_usage()
+///
+//  Copyright (C) 2008 Lasse Collin
 //
-//  Author:     Lasse Collin
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"
-#include "lzma.h"
 #include <stdio.h>
 
 int
 main(void)
 {
+	lzma_init();
+
 	lzma_options_lzma lzma = {
-		.dict_size = (1U << 30) + (1U << 29),
+		.dictionary_size = (1 << 27) + (1 << 26),
-		.lc = 3,
+		.literal_context_bits = 3,
-		.lp = 0,
+		.literal_pos_bits = 0,
-		.pb = 2,
+		.pos_bits = 2,
-		.preset_dict = NULL,
+		.preset_dictionary = NULL,
-		.preset_dict_size = 0,
+		.preset_dictionary_size = 0,
 		.mode = LZMA_MODE_NORMAL,
-		.nice_len = 48,
+		.fast_bytes = 48,
-		.mf = LZMA_MF_BT4,
+		.match_finder = LZMA_MF_BT4,
-		.depth = 0,
+		.match_finder_cycles = 0,
 	};
 
 /*
 	lzma_options_filter filters[] = {
-		{ LZMA_FILTER_LZMA1,
+		{ LZMA_FILTER_LZMA,
 			(lzma_options_lzma *)&lzma_preset_lzma[6 - 1] },
 		{ UINT64_MAX, NULL }
 	};
 */
 	lzma_filter filters[] = {
-		{ LZMA_FILTER_LZMA1, &lzma },
+		{ LZMA_FILTER_LZMA, &lzma },
 		{ UINT64_MAX, NULL }
 	};
 
-	printf("Encoder: %10" PRIu64 " B\n",
+	printf("Encoder: %10" PRIu64 " B\n", lzma_memusage_encoder(filters));
-			lzma_raw_encoder_memusage(filters));
+	printf("Decoder: %10" PRIu64 " B\n", lzma_memusage_decoder(filters));
-	printf("Decoder: %10" PRIu64 " B\n",
-			lzma_raw_decoder_memusage(filters));
 
 	return 0;
 }

debug/repeat.c

@@ -1,5 +1,3 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       repeat.c
@@ -9,7 +7,17 @@
 /// the Subblock filter, especially the condition when repeat count
 /// doesn't fit into 28-bit integer.
 //
-//  Author:     Lasse Collin
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 

debug/sync_flush.c

@@ -1,20 +1,25 @@
-// SPDX-License-Identifier: 0BSD
-
 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       sync_flush.c
 /// \brief      Encode files using LZMA_SYNC_FLUSH
 //
-//  Author:     Lasse Collin
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "sysdefs.h"
-#include "lzma.h"
 #include <stdio.h>
 
-#define CHUNK 64
-
 
 static lzma_stream strm = LZMA_STREAM_INIT;
 static FILE *file_in;
@@ -23,13 +28,14 @@ static FILE *file_in;
 static void
 encode(size_t size, lzma_action action)
 {
+	static const size_t CHUNK = 64;
 	uint8_t in[CHUNK];
 	uint8_t out[CHUNK];
 	lzma_ret ret;
 
 	do {
 		if (strm.avail_in == 0 && size > 0) {
-			const size_t amount = my_min(size, CHUNK);
+			const size_t amount = MIN(size, CHUNK);
 			strm.avail_in = fread(in, 1, amount, file_in);
 			strm.next_in = in;
 			size -= amount; // Intentionally not using avail_in.
@@ -62,29 +68,44 @@ encode(size_t size, lzma_action action)
 int
 main(int argc, char **argv)
 {
+	lzma_init_encoder();
+
 	file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
 
 	// Config
 	lzma_options_lzma opt_lzma = {
-		.dict_size = 1U << 16,
+		.dictionary_size = 1 << 16,
-		.lc = LZMA_LC_DEFAULT,
+		.literal_context_bits = LZMA_LITERAL_CONTEXT_BITS_DEFAULT,
-		.lp = LZMA_LP_DEFAULT,
+		.literal_pos_bits = LZMA_LITERAL_POS_BITS_DEFAULT,
-		.pb = LZMA_PB_DEFAULT,
+		.pos_bits = LZMA_POS_BITS_DEFAULT,
-		.preset_dict = NULL,
+		.preset_dictionary = NULL,
+		.persistent = true,
 		.mode = LZMA_MODE_NORMAL,
-		.nice_len = 32,
+		.fast_bytes = 32,
-		.mf = LZMA_MF_HC3,
+		.match_finder = LZMA_MF_HC3,
-		.depth = 0,
+		.match_finder_cycles = 0,
 	};
 
 	lzma_options_delta opt_delta = {
-		.dist = 16
+		.distance = 16
 	};
 
-	lzma_filter filters[LZMA_FILTERS_MAX + 1];
+	lzma_options_subblock opt_subblock = {
+		.allow_subfilters = true,
+		.alignment = 8, // LZMA_SUBBLOCK_ALIGNMENT_DEFAULT,
+		.subblock_data_size = LZMA_SUBBLOCK_DATA_SIZE_DEFAULT,
+		.rle = 1, // LZMA_SUBBLOCK_RLE_OFF,
+		.subfilter_mode = LZMA_SUBFILTER_SET,
+	};
+	opt_subblock.subfilter_options.id = LZMA_FILTER_LZMA;
+	opt_subblock.subfilter_options.options = &opt_lzma;
+	opt_subblock.subfilter_options.id = LZMA_FILTER_DELTA;
+	opt_subblock.subfilter_options.options = &opt_delta;
+
+	lzma_filter filters[LZMA_BLOCK_FILTERS_MAX + 1];
 	filters[0].id = LZMA_FILTER_LZMA2;
 	filters[0].options = &opt_lzma;
-	filters[1].id = LZMA_VLI_UNKNOWN;
+	filters[1].id = LZMA_VLI_VALUE_UNKNOWN;
 
 	// Init
 	if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) {
@@ -93,24 +114,19 @@ main(int argc, char **argv)
 	}
 
 	// Encoding
+/*
 	encode(0, LZMA_SYNC_FLUSH);
 	encode(6, LZMA_SYNC_FLUSH);
 	encode(0, LZMA_SYNC_FLUSH);
 	encode(7, LZMA_SYNC_FLUSH);
 	encode(0, LZMA_SYNC_FLUSH);
 	encode(0, LZMA_FINISH);
-
-/*
-	encode(53, LZMA_SYNC_FLUSH);
-	opt_lzma.lc = 2;
-	opt_lzma.lp = 1;
-	opt_lzma.pb = 0;
-	if (lzma_filters_update(&strm, filters) != LZMA_OK) {
-		fprintf(stderr, "update failed\n");
-		exit(1);
-	}
-	encode(404, LZMA_FINISH);
 */
+	encode(53, LZMA_SYNC_FLUSH);
+// 	opt_lzma.literal_context_bits = 2;
+// 	opt_lzma.literal_pos_bits = 1;
+// 	opt_lzma.pos_bits = 0;
+	encode(404, LZMA_FINISH);
 
 	// Clean up
 	lzma_end(&strm);
@@ -120,5 +136,6 @@ main(int argc, char **argv)
 	// Prevent useless warnings so we don't need to have special CFLAGS
 	// to disable -Werror.
 	(void)opt_lzma;
+	(void)opt_subblock;
 	(void)opt_delta;
 }

debug/testfilegen-arm64.c

@@ -1,116 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       testfilegen-arm64.c
-/// \brief      Generates uncompressed test file for the ARM64 filter
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-
-
-static uint32_t pc4 = 0;
-
-
-static void
-put32le(uint32_t v)
-{
-	putchar((v >> 0) & 0xFF);
-	putchar((v >> 8) & 0xFF);
-	putchar((v >> 16) & 0xFF);
-	putchar((v >> 24) & 0xFF);
-	++pc4;
-}
-
-
-static void
-putbl(uint32_t imm)
-{
-	imm &= (1U << 26) - 1;
-	imm |= 0x25U << 26;
-	put32le(imm);
-}
-
-
-static void
-putadrp32(uint32_t imm)
-{
-	imm &= 0x1FFFFFU;
-
-	// fprintf(stderr, "ADRP 0x%08X\n", imm);
-
-	uint32_t instr = 0x90000000;
-	instr |= (pc4 * 5 + 11) & 0x1F;
-	instr |= (imm & 3) << 29;
-	instr |= (imm >> 2) << 5;
-
-	put32le(instr);
-}
-
-
-extern int
-main(void)
-{
-	putbl(0);
-	putbl(0x03FFFFFF);
-	putbl(0x03FFFFFE);
-	putbl(0x03FFFFFD);
-
-	putbl(3);
-	putbl(2);
-	putbl(1);
-	putbl(0);
-
-
-	putbl(0x02000001);
-	putbl(0x02000000);
-	putbl(0x01FFFFFF);
-	putbl(0x01FFFFFE);
-
-	putbl(0x01111117);
-	putbl(0x01111116);
-	putbl(0x01111115);
-	putbl(0x01111114);
-
-
-	putbl(0x02222227);
-	putbl(0x02222226);
-	putbl(0x02222225);
-	putbl(0x02222224);
-
-	putbl(0U - pc4);
-	putbl(0U - pc4);
-	putbl(0U - pc4);
-	putbl(0U - pc4);
-
-	putadrp32(0x00);
-	putadrp32(0x05);
-	putadrp32(0x15);
-	putadrp32(0x25);
-
-	for (unsigned rep = 0; rep < 2; ++rep) {
-		while ((pc4 << 2) & 4095)
-			put32le(0x55555555U);
-
-		for (unsigned i = 10; i <= 21; ++i) {
-			const uint32_t neg = (0x1FFF00 >> (21 - i)) & ~255U;
-			const uint32_t plus = 1U << (i - 1);
-			putadrp32(0x000000 | plus);
-			putadrp32(0x000005 | plus);
-			putadrp32(0x0000FE | plus);
-			putadrp32(0x0000FF | plus);
-
-			putadrp32(0x000000 | neg);
-			putadrp32(0x000005 | neg);
-			putadrp32(0x0000FE | neg);
-			putadrp32(0x0000FF | neg);
-		}
-	}
-
-	return 0;
-}

debug/translation.bash

@@ -1,95 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: 0BSD
-
-###############################################################################
-#
-# Script to check output of some translated messages
-#
-# This should be useful for translators to check that the translated strings
-# look good. This doesn't make xz print all possible strings, but it should
-# cover most of the cases where mistakes can easily happen.
-#
-# Give the path and filename of the xz executable as an argument. If no
-# arguments are given, this script uses src/xz/xz (relative to the current
-# directory).
-#
-# You may want to pipe the output of this script to less -S to view the
-# tables printed by xz --list on a 80-column terminal. On the other hand,
-# viewing the other messages may be better without -S.
-#
-###############################################################################
-#
-# Author: Lasse Collin
-#
-###############################################################################
-
-set -e
-
-# If an argument was given, use it to set the location of the xz executable.
-unset XZ
-if [ -n "$1" ]; then
-	XZ=$1
-	[ "x${XZ:0:1}" != "x/" ] && XZ="$PWD/$XZ"
-fi
-
-# If XZ wasn't already set, use the default location.
-XZ=${XZ-"$PWD/src/xz/xz"}
-if [ "$(type -t "$XZ" || true)" != "file" ]; then
-	echo "Give the location of the xz executable as an argument" \
-			"to this script."
-	exit 1
-fi
-XZ=$(type -p -- "$XZ")
-
-# Locate top_srcdir and go there.
-top_srcdir="$(cd -- "$(dirname -- "$0")" && cd .. && pwd)"
-cd -- "$top_srcdir"
-
-# Print the xz version and locale information.
-echo "$XZ --version"
-"$XZ" --version
-echo
-if [ -d .git ] && type git > /dev/null 2>&1; then
-	echo "Source code version in $PWD:"
-	git describe --abbrev=8
-fi
-echo
-echo "LANGUAGE=$LANGUAGE"
-locale
-echo
-
-# Make the test files directory the current directory.
-cd tests/files
-
-# Put xz in PATH so that argv[0] stays short.
-PATH=${XZ%/*}:$PATH
-
-# Some of the test commands are error messages and thus don't
-# return successfully.
-set +e
-
-for CMD in \
-	"xz --foobarbaz" \
-	"xz --memlimit=123abcd" \
-	"xz --memlimit=40MiB -6 /dev/null" \
-	"xz --memlimit=0 --info-memory" \
-	"xz --memlimit-compress=1234MiB --memlimit-decompress=50MiB --info-memory" \
-	"xz --verbose --verbose /dev/null | cat" \
-	"xz --lzma2=foobarbaz" \
-	"xz --lzma2=foobarbaz=abcd" \
-	"xz --lzma2=mf=abcd" \
-	"xz --lzma2=preset=foobarbaz" \
-	"xz --lzma2=nice=50000" \
-	"xz --help" \
-	"xz --long-help" \
-	"xz --filters-help" \
-	"xz --list good-*lzma2*" \
-	"xz --list good-1-check* unsupported-check.xz" \
-	"xz --list --verbose --verbose good-1-arm64-lzma2-1.xz good-1-block_header-1.xz good-1-check-sha256.xz good-2-lzma2.xz"
-do
-	echo "-----------------------------------------------------------"
-	echo
-	echo "\$ $CMD"
-	eval "$CMD"
-	echo
-done 2>&1

doc/SHA256SUMS

@@ -1,249 +0,0 @@
-61e82b90203cd44c3a712fee5e1efb2a3de62c673cfbe010928856ef2a29b907  xz-4.999.9beta.tar
-330312c4397608d8b7be362cc7edbfeafa6101614bc2164d816ea767656aa15c  xz-4.999.9beta.tar.bz2
-fa3901d1c034842da47fec1a24a9b5a5bd435f5ecfbb444c168512e2daddb86f  xz-4.999.9beta.tar.gz
-d6649124c7046caea616f599716a559c971c97947e4533c8f25f683310154e8c  xz-4.999.9beta.tar.xz
-0cb40c62ab80536c9cda0125bad445994c0c48f7f9e7c5a3839dbe2be7e7dabc  xz-5.0.0.tar
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doc/bugs.txt

@@ -0,0 +1,46 @@
+
+Reporting bugs
+--------------
+
+    Naturally it is easiest for me if you already know what causes the
+    unexpected behavior. Even better if you have a patch to propose.
+    However, quite often the reason for unexpected behavior is unknown,
+    so below are a few things what to do before sending a bug report.
+
+    In case of a crash (usually segmentation violation):
+
+      1. Try to create a small example how to reprocude the issue.
+
+      2. If you are writing an application using liblzma or libzfile,
+         double check that you are using the libraries correctly (for
+         example, that you didn't forget to call lzma_init()). If it is
+         the command line tool included in LZMA Utils that is crashing,
+         ignore this step.
+
+      3. Compile LZMA Utils with debugging code using configure switch
+         `--enable-debug'. If you are using GCC as the compiler, use
+         CFLAGS='-O0 -ggdb'. Don't strip the resulting binaries.
+
+      4. Turn on core dumps. The exact command depends on your shell;
+         for example in GNU bash it is done with `ulimit -c unlimited',
+         and in tcsh with `limit coredumpsize unlimited'.
+
+      5. Try to reproduce the suspected bug. If you get `assertion failed'
+         message, be sure to include the complete message in your bug
+         report. If the application leaves a coredump, get a backtrace
+         using gdb:
+           $ gdb /path/to/app-binary   # Loads the app to the debugger.
+           (gdb) core core   # Opens the coredump.
+           (gdb) bt   # Prints the backtrace. Copy & paste to bug report.
+           (gdb) quit   # Quits gdb.
+
+    Send your bug report to Lasse Collin <lasse.collin@tukaani.org>. Don't
+    send the core dump file or the actual executables. If you have a small
+    example file(s) (total size less than 100 KiB), please include it/them
+    as an attachment.
+
+    Do NOT complain about problems with LZMA Utils to Igor Pavlov.
+    Although the code of LZMA Utils is derived from his code, there are
+    a lot of changes, which may have introduced bugs not present in
+    the original version.
+

doc/examples/00_README.txt

@@ -1,31 +0,0 @@
-
-liblzma example programs
-========================
-
-Introduction
-
-    The examples are written so that the same comments aren't
-    repeated (much) in later files.
-
-    On POSIX systems, the examples should build by just typing "make".
-
-    The examples that use stdin or stdout don't set stdin and stdout
-    to binary mode. On systems where it matters (e.g. Windows) it is
-    possible that the examples won't work without modification.
-
-
-List of examples
-
-    01_compress_easy.c                  Multi-call compression using
-                                        a compression preset
-
-    02_decompress.c                     Multi-call decompression
-
-    03_compress_custom.c                Like 01_compress_easy.c but using
-                                        a custom filter chain
-                                        (x86 BCJ + LZMA2)
-
-    04_compress_easy_mt.c               Multi-threaded multi-call
-                                        compression using a compression
-                                        preset
-

doc/examples/01_compress_easy.c

@@ -1,296 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       01_compress_easy.c
-/// \brief      Compress from stdin to stdout in multi-call mode
-///
-/// Usage:      ./01_compress_easy PRESET < INFILE > OUTFILE
-///
-/// Example:    ./01_compress_easy 6 < foo > foo.xz
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <lzma.h>
-
-
-static void
-show_usage_and_exit(const char *argv0)
-{
-	fprintf(stderr, "Usage: %s PRESET < INFILE > OUTFILE\n"
-			"PRESET is a number 0-9 and can optionally be "
-			"followed by 'e' to indicate extreme preset\n",
-			argv0);
-	exit(EXIT_FAILURE);
-}
-
-
-static uint32_t
-get_preset(int argc, char **argv)
-{
-	// One argument whose first char must be 0-9.
-	if (argc != 2 || argv[1][0] < '0' || argv[1][0] > '9')
-		show_usage_and_exit(argv[0]);
-
-	// Calculate the preste level 0-9.
-	uint32_t preset = argv[1][0] - '0';
-
-	// If there is a second char, it must be 'e'. It will set
-	// the LZMA_PRESET_EXTREME flag.
-	if (argv[1][1] != '\0') {
-		if (argv[1][1] != 'e' || argv[1][2] != '\0')
-			show_usage_and_exit(argv[0]);
-
-		preset |= LZMA_PRESET_EXTREME;
-	}
-
-	return preset;
-}
-
-
-static bool
-init_encoder(lzma_stream *strm, uint32_t preset)
-{
-	// Initialize the encoder using a preset. Set the integrity to check
-	// to CRC64, which is the default in the xz command line tool. If
-	// the .xz file needs to be decompressed with XZ Embedded, use
-	// LZMA_CHECK_CRC32 instead.
-	lzma_ret ret = lzma_easy_encoder(strm, preset, LZMA_CHECK_CRC64);
-
-	// Return successfully if the initialization went fine.
-	if (ret == LZMA_OK)
-		return true;
-
-	// Something went wrong. The possible errors are documented in
-	// lzma/container.h (src/liblzma/api/lzma/container.h in the source
-	// package or e.g. /usr/include/lzma/container.h depending on the
-	// install prefix).
-	const char *msg;
-	switch (ret) {
-	case LZMA_MEM_ERROR:
-		msg = "Memory allocation failed";
-		break;
-
-	case LZMA_OPTIONS_ERROR:
-		msg = "Specified preset is not supported";
-		break;
-
-	case LZMA_UNSUPPORTED_CHECK:
-		msg = "Specified integrity check is not supported";
-		break;
-
-	default:
-		// This is most likely LZMA_PROG_ERROR indicating a bug in
-		// this program or in liblzma. It is inconvenient to have a
-		// separate error message for errors that should be impossible
-		// to occur, but knowing the error code is important for
-		// debugging. That's why it is good to print the error code
-		// at least when there is no good error message to show.
-		msg = "Unknown error, possibly a bug";
-		break;
-	}
-
-	fprintf(stderr, "Error initializing the encoder: %s (error code %u)\n",
-			msg, ret);
-	return false;
-}
-
-
-static bool
-compress(lzma_stream *strm, FILE *infile, FILE *outfile)
-{
-	// This will be LZMA_RUN until the end of the input file is reached.
-	// This tells lzma_code() when there will be no more input.
-	lzma_action action = LZMA_RUN;
-
-	// Buffers to temporarily hold uncompressed input
-	// and compressed output.
-	uint8_t inbuf[BUFSIZ];
-	uint8_t outbuf[BUFSIZ];
-
-	// Initialize the input and output pointers. Initializing next_in
-	// and avail_in isn't really necessary when we are going to encode
-	// just one file since LZMA_STREAM_INIT takes care of initializing
-	// those already. But it doesn't hurt much and it will be needed
-	// if encoding more than one file like we will in 02_decompress.c.
-	//
-	// While we don't care about strm->total_in or strm->total_out in this
-	// example, it is worth noting that initializing the encoder will
-	// always reset total_in and total_out to zero. But the encoder
-	// initialization doesn't touch next_in, avail_in, next_out, or
-	// avail_out.
-	strm->next_in = NULL;
-	strm->avail_in = 0;
-	strm->next_out = outbuf;
-	strm->avail_out = sizeof(outbuf);
-
-	// Loop until the file has been successfully compressed or until
-	// an error occurs.
-	while (true) {
-		// Fill the input buffer if it is empty.
-		if (strm->avail_in == 0 && !feof(infile)) {
-			strm->next_in = inbuf;
-			strm->avail_in = fread(inbuf, 1, sizeof(inbuf),
-					infile);
-
-			if (ferror(infile)) {
-				fprintf(stderr, "Read error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			// Once the end of the input file has been reached,
-			// we need to tell lzma_code() that no more input
-			// will be coming and that it should finish the
-			// encoding.
-			if (feof(infile))
-				action = LZMA_FINISH;
-		}
-
-		// Tell liblzma do the actual encoding.
-		//
-		// This reads up to strm->avail_in bytes of input starting
-		// from strm->next_in. avail_in will be decremented and
-		// next_in incremented by an equal amount to match the
-		// number of input bytes consumed.
-		//
-		// Up to strm->avail_out bytes of compressed output will be
-		// written starting from strm->next_out. avail_out and next_out
-		// will be incremented by an equal amount to match the number
-		// of output bytes written.
-		//
-		// The encoder has to do internal buffering, which means that
-		// it may take quite a bit of input before the same data is
-		// available in compressed form in the output buffer.
-		lzma_ret ret = lzma_code(strm, action);
-
-		// If the output buffer is full or if the compression finished
-		// successfully, write the data from the output buffer to
-		// the output file.
-		if (strm->avail_out == 0 || ret == LZMA_STREAM_END) {
-			// When lzma_code() has returned LZMA_STREAM_END,
-			// the output buffer is likely to be only partially
-			// full. Calculate how much new data there is to
-			// be written to the output file.
-			size_t write_size = sizeof(outbuf) - strm->avail_out;
-
-			if (fwrite(outbuf, 1, write_size, outfile)
-					!= write_size) {
-				fprintf(stderr, "Write error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			// Reset next_out and avail_out.
-			strm->next_out = outbuf;
-			strm->avail_out = sizeof(outbuf);
-		}
-
-		// Normally the return value of lzma_code() will be LZMA_OK
-		// until everything has been encoded.
-		if (ret != LZMA_OK) {
-			// Once everything has been encoded successfully, the
-			// return value of lzma_code() will be LZMA_STREAM_END.
-			//
-			// It is important to check for LZMA_STREAM_END. Do not
-			// assume that getting ret != LZMA_OK would mean that
-			// everything has gone well.
-			if (ret == LZMA_STREAM_END)
-				return true;
-
-			// It's not LZMA_OK nor LZMA_STREAM_END,
-			// so it must be an error code. See lzma/base.h
-			// (src/liblzma/api/lzma/base.h in the source package
-			// or e.g. /usr/include/lzma/base.h depending on the
-			// install prefix) for the list and documentation of
-			// possible values. Most values listen in lzma_ret
-			// enumeration aren't possible in this example.
-			const char *msg;
-			switch (ret) {
-			case LZMA_MEM_ERROR:
-				msg = "Memory allocation failed";
-				break;
-
-			case LZMA_DATA_ERROR:
-				// This error is returned if the compressed
-				// or uncompressed size get near 8 EiB
-				// (2^63 bytes) because that's where the .xz
-				// file format size limits currently are.
-				// That is, the possibility of this error
-				// is mostly theoretical unless you are doing
-				// something very unusual.
-				//
-				// Note that strm->total_in and strm->total_out
-				// have nothing to do with this error. Changing
-				// those variables won't increase or decrease
-				// the chance of getting this error.
-				msg = "File size limits exceeded";
-				break;
-
-			default:
-				// This is most likely LZMA_PROG_ERROR, but
-				// if this program is buggy (or liblzma has
-				// a bug), it may be e.g. LZMA_BUF_ERROR or
-				// LZMA_OPTIONS_ERROR too.
-				//
-				// It is inconvenient to have a separate
-				// error message for errors that should be
-				// impossible to occur, but knowing the error
-				// code is important for debugging. That's why
-				// it is good to print the error code at least
-				// when there is no good error message to show.
-				msg = "Unknown error, possibly a bug";
-				break;
-			}
-
-			fprintf(stderr, "Encoder error: %s (error code %u)\n",
-					msg, ret);
-			return false;
-		}
-	}
-}
-
-
-extern int
-main(int argc, char **argv)
-{
-	// Get the preset number from the command line.
-	uint32_t preset = get_preset(argc, argv);
-
-	// Initialize a lzma_stream structure. When it is allocated on stack,
-	// it is simplest to use LZMA_STREAM_INIT macro like below. When it
-	// is allocated on heap, using memset(strmptr, 0, sizeof(*strmptr))
-	// works (as long as NULL pointers are represented with zero bits
-	// as they are on practically all computers today).
-	lzma_stream strm = LZMA_STREAM_INIT;
-
-	// Initialize the encoder. If it succeeds, compress from
-	// stdin to stdout.
-	bool success = init_encoder(&strm, preset);
-	if (success)
-		success = compress(&strm, stdin, stdout);
-
-	// Free the memory allocated for the encoder. If we were encoding
-	// multiple files, this would only need to be done after the last
-	// file. See 02_decompress.c for handling of multiple files.
-	//
-	// It is OK to call lzma_end() multiple times or when it hasn't been
-	// actually used except initialized with LZMA_STREAM_INIT.
-	lzma_end(&strm);
-
-	// Close stdout to catch possible write errors that can occur
-	// when pending data is flushed from the stdio buffers.
-	if (fclose(stdout)) {
-		fprintf(stderr, "Write error: %s\n", strerror(errno));
-		success = false;
-	}
-
-	return success ? EXIT_SUCCESS : EXIT_FAILURE;
-}

doc/examples/02_decompress.c

@@ -1,286 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       02_decompress.c
-/// \brief      Decompress .xz files to stdout
-///
-/// Usage:      ./02_decompress INPUT_FILES... > OUTFILE
-///
-/// Example:    ./02_decompress foo.xz bar.xz > foobar
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <lzma.h>
-
-
-static bool
-init_decoder(lzma_stream *strm)
-{
-	// Initialize a .xz decoder. The decoder supports a memory usage limit
-	// and a set of flags.
-	//
-	// The memory usage of the decompressor depends on the settings used
-	// to compress a .xz file. It can vary from less than a megabyte to
-	// a few gigabytes, but in practice (at least for now) it rarely
-	// exceeds 65 MiB because that's how much memory is required to
-	// decompress files created with "xz -9". Settings requiring more
-	// memory take extra effort to use and don't (at least for now)
-	// provide significantly better compression in most cases.
-	//
-	// Memory usage limit is useful if it is important that the
-	// decompressor won't consume gigabytes of memory. The need
-	// for limiting depends on the application. In this example,
-	// no memory usage limiting is used. This is done by setting
-	// the limit to UINT64_MAX.
-	//
-	// The .xz format allows concatenating compressed files as is:
-	//
-	//     echo foo | xz > foobar.xz
-	//     echo bar | xz >> foobar.xz
-	//
-	// When decompressing normal standalone .xz files, LZMA_CONCATENATED
-	// should always be used to support decompression of concatenated
-	// .xz files. If LZMA_CONCATENATED isn't used, the decoder will stop
-	// after the first .xz stream. This can be useful when .xz data has
-	// been embedded inside another file format.
-	//
-	// Flags other than LZMA_CONCATENATED are supported too, and can
-	// be combined with bitwise-or. See lzma/container.h
-	// (src/liblzma/api/lzma/container.h in the source package or e.g.
-	// /usr/include/lzma/container.h depending on the install prefix)
-	// for details.
-	lzma_ret ret = lzma_stream_decoder(
-			strm, UINT64_MAX, LZMA_CONCATENATED);
-
-	// Return successfully if the initialization went fine.
-	if (ret == LZMA_OK)
-		return true;
-
-	// Something went wrong. The possible errors are documented in
-	// lzma/container.h (src/liblzma/api/lzma/container.h in the source
-	// package or e.g. /usr/include/lzma/container.h depending on the
-	// install prefix).
-	//
-	// Note that LZMA_MEMLIMIT_ERROR is never possible here. If you
-	// specify a very tiny limit, the error will be delayed until
-	// the first headers have been parsed by a call to lzma_code().
-	const char *msg;
-	switch (ret) {
-	case LZMA_MEM_ERROR:
-		msg = "Memory allocation failed";
-		break;
-
-	case LZMA_OPTIONS_ERROR:
-		msg = "Unsupported decompressor flags";
-		break;
-
-	default:
-		// This is most likely LZMA_PROG_ERROR indicating a bug in
-		// this program or in liblzma. It is inconvenient to have a
-		// separate error message for errors that should be impossible
-		// to occur, but knowing the error code is important for
-		// debugging. That's why it is good to print the error code
-		// at least when there is no good error message to show.
-		msg = "Unknown error, possibly a bug";
-		break;
-	}
-
-	fprintf(stderr, "Error initializing the decoder: %s (error code %u)\n",
-			msg, ret);
-	return false;
-}
-
-
-static bool
-decompress(lzma_stream *strm, const char *inname, FILE *infile, FILE *outfile)
-{
-	// When LZMA_CONCATENATED flag was used when initializing the decoder,
-	// we need to tell lzma_code() when there will be no more input.
-	// This is done by setting action to LZMA_FINISH instead of LZMA_RUN
-	// in the same way as it is done when encoding.
-	//
-	// When LZMA_CONCATENATED isn't used, there is no need to use
-	// LZMA_FINISH to tell when all the input has been read, but it
-	// is still OK to use it if you want. When LZMA_CONCATENATED isn't
-	// used, the decoder will stop after the first .xz stream. In that
-	// case some unused data may be left in strm->next_in.
-	lzma_action action = LZMA_RUN;
-
-	uint8_t inbuf[BUFSIZ];
-	uint8_t outbuf[BUFSIZ];
-
-	strm->next_in = NULL;
-	strm->avail_in = 0;
-	strm->next_out = outbuf;
-	strm->avail_out = sizeof(outbuf);
-
-	while (true) {
-		if (strm->avail_in == 0 && !feof(infile)) {
-			strm->next_in = inbuf;
-			strm->avail_in = fread(inbuf, 1, sizeof(inbuf),
-					infile);
-
-			if (ferror(infile)) {
-				fprintf(stderr, "%s: Read error: %s\n",
-						inname, strerror(errno));
-				return false;
-			}
-
-			// Once the end of the input file has been reached,
-			// we need to tell lzma_code() that no more input
-			// will be coming. As said before, this isn't required
-			// if the LZMA_CONCATENATED flag isn't used when
-			// initializing the decoder.
-			if (feof(infile))
-				action = LZMA_FINISH;
-		}
-
-		lzma_ret ret = lzma_code(strm, action);
-
-		if (strm->avail_out == 0 || ret == LZMA_STREAM_END) {
-			size_t write_size = sizeof(outbuf) - strm->avail_out;
-
-			if (fwrite(outbuf, 1, write_size, outfile)
-					!= write_size) {
-				fprintf(stderr, "Write error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			strm->next_out = outbuf;
-			strm->avail_out = sizeof(outbuf);
-		}
-
-		if (ret != LZMA_OK) {
-			// Once everything has been decoded successfully, the
-			// return value of lzma_code() will be LZMA_STREAM_END.
-			//
-			// It is important to check for LZMA_STREAM_END. Do not
-			// assume that getting ret != LZMA_OK would mean that
-			// everything has gone well or that when you aren't
-			// getting more output it must have successfully
-			// decoded everything.
-			if (ret == LZMA_STREAM_END)
-				return true;
-
-			// It's not LZMA_OK nor LZMA_STREAM_END,
-			// so it must be an error code. See lzma/base.h
-			// (src/liblzma/api/lzma/base.h in the source package
-			// or e.g. /usr/include/lzma/base.h depending on the
-			// install prefix) for the list and documentation of
-			// possible values. Many values listen in lzma_ret
-			// enumeration aren't possible in this example, but
-			// can be made possible by enabling memory usage limit
-			// or adding flags to the decoder initialization.
-			const char *msg;
-			switch (ret) {
-			case LZMA_MEM_ERROR:
-				msg = "Memory allocation failed";
-				break;
-
-			case LZMA_FORMAT_ERROR:
-				// .xz magic bytes weren't found.
-				msg = "The input is not in the .xz format";
-				break;
-
-			case LZMA_OPTIONS_ERROR:
-				// For example, the headers specify a filter
-				// that isn't supported by this liblzma
-				// version (or it hasn't been enabled when
-				// building liblzma, but no-one sane does
-				// that unless building liblzma for an
-				// embedded system). Upgrading to a newer
-				// liblzma might help.
-				//
-				// Note that it is unlikely that the file has
-				// accidentally became corrupt if you get this
-				// error. The integrity of the .xz headers is
-				// always verified with a CRC32, so
-				// unintentionally corrupt files can be
-				// distinguished from unsupported files.
-				msg = "Unsupported compression options";
-				break;
-
-			case LZMA_DATA_ERROR:
-				msg = "Compressed file is corrupt";
-				break;
-
-			case LZMA_BUF_ERROR:
-				// Typically this error means that a valid
-				// file has got truncated, but it might also
-				// be a damaged part in the file that makes
-				// the decoder think the file is truncated.
-				// If you prefer, you can use the same error
-				// message for this as for LZMA_DATA_ERROR.
-				msg = "Compressed file is truncated or "
-						"otherwise corrupt";
-				break;
-
-			default:
-				// This is most likely LZMA_PROG_ERROR.
-				msg = "Unknown error, possibly a bug";
-				break;
-			}
-
-			fprintf(stderr, "%s: Decoder error: "
-					"%s (error code %u)\n",
-					inname, msg, ret);
-			return false;
-		}
-	}
-}
-
-
-extern int
-main(int argc, char **argv)
-{
-	if (argc <= 1) {
-		fprintf(stderr, "Usage: %s FILES...\n", argv[0]);
-		return EXIT_FAILURE;
-	}
-
-	lzma_stream strm = LZMA_STREAM_INIT;
-
-	bool success = true;
-
-	// Try to decompress all files.
-	for (int i = 1; i < argc; ++i) {
-		if (!init_decoder(&strm)) {
-			// Decoder initialization failed. There's no point
-			// to retry it so we need to exit.
-			success = false;
-			break;
-		}
-
-		FILE *infile = fopen(argv[i], "rb");
-
-		if (infile == NULL) {
-			fprintf(stderr, "%s: Error opening the "
-					"input file: %s\n",
-					argv[i], strerror(errno));
-			success = false;
-		} else {
-			success &= decompress(&strm, argv[i], infile, stdout);
-			fclose(infile);
-		}
-	}
-
-	// Free the memory allocated for the decoder. This only needs to be
-	// done after the last file.
-	lzma_end(&strm);
-
-	if (fclose(stdout)) {
-		fprintf(stderr, "Write error: %s\n", strerror(errno));
-		success = false;
-	}
-
-	return success ? EXIT_SUCCESS : EXIT_FAILURE;
-}

doc/examples/03_compress_custom.c

@@ -1,192 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       03_compress_custom.c
-/// \brief      Compress in multi-call mode using x86 BCJ and LZMA2
-///
-/// Usage:      ./03_compress_custom < INFILE > OUTFILE
-///
-/// Example:    ./03_compress_custom < foo > foo.xz
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <lzma.h>
-
-
-static bool
-init_encoder(lzma_stream *strm)
-{
-	// Use the default preset (6) for LZMA2.
-	//
-	// The lzma_options_lzma structure and the lzma_lzma_preset() function
-	// are declared in lzma/lzma12.h (src/liblzma/api/lzma/lzma12.h in the
-	// source package or e.g. /usr/include/lzma/lzma12.h depending on
-	// the install prefix).
-	lzma_options_lzma opt_lzma2;
-	if (lzma_lzma_preset(&opt_lzma2, LZMA_PRESET_DEFAULT)) {
-		// It should never fail because the default preset
-		// (and presets 0-9 optionally with LZMA_PRESET_EXTREME)
-		// are supported by all stable liblzma versions.
-		//
-		// (The encoder initialization later in this function may
-		// still fail due to unsupported preset *if* the features
-		// required by the preset have been disabled at build time,
-		// but no-one does such things except on embedded systems.)
-		fprintf(stderr, "Unsupported preset, possibly a bug\n");
-		return false;
-	}
-
-	// Now we could customize the LZMA2 options if we wanted. For example,
-	// we could set the dictionary size (opt_lzma2.dict_size) to
-	// something else than the default (8 MiB) of the default preset.
-	// See lzma/lzma12.h for details of all LZMA2 options.
-	//
-	// The x86 BCJ filter will try to modify the x86 instruction stream so
-	// that LZMA2 can compress it better. The x86 BCJ filter doesn't need
-	// any options so it will be set to NULL below.
-	//
-	// Construct the filter chain. The uncompressed data goes first to
-	// the first filter in the array, in this case the x86 BCJ filter.
-	// The array is always terminated by setting .id = LZMA_VLI_UNKNOWN.
-	//
-	// See lzma/filter.h for more information about the lzma_filter
-	// structure.
-	lzma_filter filters[] = {
-		{ .id = LZMA_FILTER_X86, .options = NULL },
-		{ .id = LZMA_FILTER_LZMA2, .options = &opt_lzma2 },
-		{ .id = LZMA_VLI_UNKNOWN, .options = NULL },
-	};
-
-	// Initialize the encoder using the custom filter chain.
-	lzma_ret ret = lzma_stream_encoder(strm, filters, LZMA_CHECK_CRC64);
-
-	if (ret == LZMA_OK)
-		return true;
-
-	const char *msg;
-	switch (ret) {
-	case LZMA_MEM_ERROR:
-		msg = "Memory allocation failed";
-		break;
-
-	case LZMA_OPTIONS_ERROR:
-		// We are no longer using a plain preset so this error
-		// message has been edited accordingly compared to
-		// 01_compress_easy.c.
-		msg = "Specified filter chain is not supported";
-		break;
-
-	case LZMA_UNSUPPORTED_CHECK:
-		msg = "Specified integrity check is not supported";
-		break;
-
-	default:
-		msg = "Unknown error, possibly a bug";
-		break;
-	}
-
-	fprintf(stderr, "Error initializing the encoder: %s (error code %u)\n",
-			msg, ret);
-	return false;
-}
-
-
-// This function is identical to the one in 01_compress_easy.c.
-static bool
-compress(lzma_stream *strm, FILE *infile, FILE *outfile)
-{
-	lzma_action action = LZMA_RUN;
-
-	uint8_t inbuf[BUFSIZ];
-	uint8_t outbuf[BUFSIZ];
-
-	strm->next_in = NULL;
-	strm->avail_in = 0;
-	strm->next_out = outbuf;
-	strm->avail_out = sizeof(outbuf);
-
-	while (true) {
-		if (strm->avail_in == 0 && !feof(infile)) {
-			strm->next_in = inbuf;
-			strm->avail_in = fread(inbuf, 1, sizeof(inbuf),
-					infile);
-
-			if (ferror(infile)) {
-				fprintf(stderr, "Read error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			if (feof(infile))
-				action = LZMA_FINISH;
-		}
-
-		lzma_ret ret = lzma_code(strm, action);
-
-		if (strm->avail_out == 0 || ret == LZMA_STREAM_END) {
-			size_t write_size = sizeof(outbuf) - strm->avail_out;
-
-			if (fwrite(outbuf, 1, write_size, outfile)
-					!= write_size) {
-				fprintf(stderr, "Write error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			strm->next_out = outbuf;
-			strm->avail_out = sizeof(outbuf);
-		}
-
-		if (ret != LZMA_OK) {
-			if (ret == LZMA_STREAM_END)
-				return true;
-
-			const char *msg;
-			switch (ret) {
-			case LZMA_MEM_ERROR:
-				msg = "Memory allocation failed";
-				break;
-
-			case LZMA_DATA_ERROR:
-				msg = "File size limits exceeded";
-				break;
-
-			default:
-				msg = "Unknown error, possibly a bug";
-				break;
-			}
-
-			fprintf(stderr, "Encoder error: %s (error code %u)\n",
-					msg, ret);
-			return false;
-		}
-	}
-}
-
-
-extern int
-main(void)
-{
-	lzma_stream strm = LZMA_STREAM_INIT;
-
-	bool success = init_encoder(&strm);
-	if (success)
-		success = compress(&strm, stdin, stdout);
-
-	lzma_end(&strm);
-
-	if (fclose(stdout)) {
-		fprintf(stderr, "Write error: %s\n", strerror(errno));
-		success = false;
-	}
-
-	return success ? EXIT_SUCCESS : EXIT_FAILURE;
-}

doc/examples/04_compress_easy_mt.c

@@ -1,205 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       04_compress_easy_mt.c
-/// \brief      Compress in multi-call mode using LZMA2 in multi-threaded mode
-///
-/// Usage:      ./04_compress_easy_mt < INFILE > OUTFILE
-///
-/// Example:    ./04_compress_easy_mt < foo > foo.xz
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <lzma.h>
-
-
-static bool
-init_encoder(lzma_stream *strm)
-{
-	// The threaded encoder takes the options as pointer to
-	// a lzma_mt structure.
-	lzma_mt mt = {
-		// No flags are needed.
-		.flags = 0,
-
-		// Let liblzma determine a sane block size.
-		.block_size = 0,
-
-		// Use no timeout for lzma_code() calls by setting timeout
-		// to zero. That is, sometimes lzma_code() might block for
-		// a long time (from several seconds to even minutes).
-		// If this is not OK, for example due to progress indicator
-		// needing updates, specify a timeout in milliseconds here.
-		// See the documentation of lzma_mt in lzma/container.h for
-		// information how to choose a reasonable timeout.
-		.timeout = 0,
-
-		// Use the default preset (6) for LZMA2.
-		// To use a preset, filters must be set to NULL.
-		.preset = LZMA_PRESET_DEFAULT,
-		.filters = NULL,
-
-		// Use CRC64 for integrity checking. See also
-		// 01_compress_easy.c about choosing the integrity check.
-		.check = LZMA_CHECK_CRC64,
-	};
-
-	// Detect how many threads the CPU supports.
-	mt.threads = lzma_cputhreads();
-
-	// If the number of CPU cores/threads cannot be detected,
-	// use one thread. Note that this isn't the same as the normal
-	// single-threaded mode as this will still split the data into
-	// blocks and use more RAM than the normal single-threaded mode.
-	// You may want to consider using lzma_easy_encoder() or
-	// lzma_stream_encoder() instead of lzma_stream_encoder_mt() if
-	// lzma_cputhreads() returns 0 or 1.
-	if (mt.threads == 0)
-		mt.threads = 1;
-
-	// If the number of CPU cores/threads exceeds threads_max,
-	// limit the number of threads to keep memory usage lower.
-	// The number 8 is arbitrarily chosen and may be too low or
-	// high depending on the compression preset and the computer
-	// being used.
-	//
-	// FIXME: A better way could be to check the amount of RAM
-	// (or available RAM) and use lzma_stream_encoder_mt_memusage()
-	// to determine if the number of threads should be reduced.
-	const uint32_t threads_max = 8;
-	if (mt.threads > threads_max)
-		mt.threads = threads_max;
-
-	// Initialize the threaded encoder.
-	lzma_ret ret = lzma_stream_encoder_mt(strm, &mt);
-
-	if (ret == LZMA_OK)
-		return true;
-
-	const char *msg;
-	switch (ret) {
-	case LZMA_MEM_ERROR:
-		msg = "Memory allocation failed";
-		break;
-
-	case LZMA_OPTIONS_ERROR:
-		// We are no longer using a plain preset so this error
-		// message has been edited accordingly compared to
-		// 01_compress_easy.c.
-		msg = "Specified filter chain is not supported";
-		break;
-
-	case LZMA_UNSUPPORTED_CHECK:
-		msg = "Specified integrity check is not supported";
-		break;
-
-	default:
-		msg = "Unknown error, possibly a bug";
-		break;
-	}
-
-	fprintf(stderr, "Error initializing the encoder: %s (error code %u)\n",
-			msg, ret);
-	return false;
-}
-
-
-// This function is identical to the one in 01_compress_easy.c.
-static bool
-compress(lzma_stream *strm, FILE *infile, FILE *outfile)
-{
-	lzma_action action = LZMA_RUN;
-
-	uint8_t inbuf[BUFSIZ];
-	uint8_t outbuf[BUFSIZ];
-
-	strm->next_in = NULL;
-	strm->avail_in = 0;
-	strm->next_out = outbuf;
-	strm->avail_out = sizeof(outbuf);
-
-	while (true) {
-		if (strm->avail_in == 0 && !feof(infile)) {
-			strm->next_in = inbuf;
-			strm->avail_in = fread(inbuf, 1, sizeof(inbuf),
-					infile);
-
-			if (ferror(infile)) {
-				fprintf(stderr, "Read error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			if (feof(infile))
-				action = LZMA_FINISH;
-		}
-
-		lzma_ret ret = lzma_code(strm, action);
-
-		if (strm->avail_out == 0 || ret == LZMA_STREAM_END) {
-			size_t write_size = sizeof(outbuf) - strm->avail_out;
-
-			if (fwrite(outbuf, 1, write_size, outfile)
-					!= write_size) {
-				fprintf(stderr, "Write error: %s\n",
-						strerror(errno));
-				return false;
-			}
-
-			strm->next_out = outbuf;
-			strm->avail_out = sizeof(outbuf);
-		}
-
-		if (ret != LZMA_OK) {
-			if (ret == LZMA_STREAM_END)
-				return true;
-
-			const char *msg;
-			switch (ret) {
-			case LZMA_MEM_ERROR:
-				msg = "Memory allocation failed";
-				break;
-
-			case LZMA_DATA_ERROR:
-				msg = "File size limits exceeded";
-				break;
-
-			default:
-				msg = "Unknown error, possibly a bug";
-				break;
-			}
-
-			fprintf(stderr, "Encoder error: %s (error code %u)\n",
-					msg, ret);
-			return false;
-		}
-	}
-}
-
-
-extern int
-main(void)
-{
-	lzma_stream strm = LZMA_STREAM_INIT;
-
-	bool success = init_encoder(&strm);
-	if (success)
-		success = compress(&strm, stdin, stdout);
-
-	lzma_end(&strm);
-
-	if (fclose(stdout)) {
-		fprintf(stderr, "Write error: %s\n", strerror(errno));
-		success = false;
-	}
-
-	return success ? EXIT_SUCCESS : EXIT_FAILURE;
-}

doc/examples/11_file_info.c

@@ -1,205 +0,0 @@
-// SPDX-License-Identifier: 0BSD
-
-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file       11_file_info.c
-/// \brief      Get uncompressed size of .xz file(s)
-///
-/// Usage:      ./11_file_info INFILE1.xz [INFILEn.xz]...
-///
-/// Example:    ./11_file_info foo.xz
-//
-//  Author:     Lasse Collin
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdbool.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <lzma.h>
-
-
-static bool
-print_file_size(lzma_stream *strm, FILE *infile, const char *filename)
-{
-	// Get the file size. In standard C it can be done by seeking to
-	// the end of the file and then getting the file position.
-	// In POSIX one can use fstat() and then st_size from struct stat.
-	// Also note that fseek() and ftell() use long and thus don't support
-	// large files on 32-bit systems (POSIX versions fseeko() and
-	// ftello() can support large files).
-	if (fseek(infile, 0, SEEK_END)) {
-		fprintf(stderr, "Error seeking the file '%s': %s\n",
-				filename, strerror(errno));
-		return false;
-	}
-
-	const long file_size = ftell(infile);
-
-	// The decoder wants to start from the beginning of the .xz file.
-	rewind(infile);
-
-	// Initialize the decoder.
-	lzma_index *i;
-	lzma_ret ret = lzma_file_info_decoder(strm, &i, UINT64_MAX,
-			(uint64_t)file_size);
-	switch (ret) {
-	case LZMA_OK:
-		// Initialization succeeded.
-		break;
-
-	case LZMA_MEM_ERROR:
-		fprintf(stderr, "Out of memory when initializing "
-				"the .xz file info decoder\n");
-		return false;
-
-	case LZMA_PROG_ERROR:
-	default:
-		fprintf(stderr, "Unknown error, possibly a bug\n");
-		return false;
-	}
-
-	// This example program reuses the same lzma_stream structure
-	// for multiple files, so we need to reset this when starting
-	// a new file.
-	strm->avail_in = 0;
-
-	// Buffer for input data.
-	uint8_t inbuf[BUFSIZ];
-
-	// Pass data to the decoder and seek when needed.
-	while (true) {
-		if (strm->avail_in == 0) {
-			strm->next_in = inbuf;
-			strm->avail_in = fread(inbuf, 1, sizeof(inbuf),
-					infile);
-
-			if (ferror(infile)) {
-				fprintf(stderr,
-					"Error reading from '%s': %s\n",
-					filename, strerror(errno));
-				return false;
-			}
-
-			// We don't need to care about hitting the end of
-			// the file so no need to check for feof().
-		}
-
-		ret = lzma_code(strm, LZMA_RUN);
-
-		switch (ret) {
-		case LZMA_OK:
-			break;
-
-		case LZMA_SEEK_NEEDED:
-			// The cast is safe because liblzma won't ask us to
-			// seek past the known size of the input file which
-			// did fit into a long.
-			//
-			// NOTE: Remember to change these to off_t if you
-			// switch fseeko() or lseek().
-			if (fseek(infile, (long)(strm->seek_pos), SEEK_SET)) {
-				fprintf(stderr, "Error seeking the "
-						"file '%s': %s\n",
-						filename, strerror(errno));
-				return false;
-			}
-
-			// The old data in the inbuf is useless now. Set
-			// avail_in to zero so that we will read new input
-			// from the new file position on the next iteration
-			// of this loop.
-			strm->avail_in = 0;
-			break;
-
-		case LZMA_STREAM_END:
-			// File information was successfully decoded.
-			// See <lzma/index.h> for functions that can be
-			// used on it. In this example we just print
-			// the uncompressed size (in bytes) of
-			// the .xz file followed by its file name.
-			printf("%10" PRIu64 " %s\n",
-					lzma_index_uncompressed_size(i),
-					filename);
-
-			// Free the memory of the lzma_index structure.
-			lzma_index_end(i, NULL);
-
-			return true;
-
-		case LZMA_FORMAT_ERROR:
-			// .xz magic bytes weren't found.
-			fprintf(stderr, "The file '%s' is not "
-					"in the .xz format\n", filename);
-			return false;
-
-		case LZMA_OPTIONS_ERROR:
-			fprintf(stderr, "The file '%s' has .xz headers that "
-					"are not supported by this liblzma "
-					"version\n", filename);
-			return false;
-
-		case LZMA_DATA_ERROR:
-			fprintf(stderr, "The file '%s' is corrupt\n",
-					filename);
-			return false;
-
-		case LZMA_MEM_ERROR:
-			fprintf(stderr, "Memory allocation failed when "
-					"decoding the file '%s'\n", filename);
-			return false;
-
-		// LZMA_MEMLIMIT_ERROR shouldn't happen because we used
-		// UINT64_MAX as the limit.
-		//
-		// LZMA_BUF_ERROR shouldn't happen because we always provide
-		// new input when the input buffer is empty. The decoder
-		// knows the input file size and thus won't try to read past
-		// the end of the file.
-		case LZMA_MEMLIMIT_ERROR:
-		case LZMA_BUF_ERROR:
-		case LZMA_PROG_ERROR:
-		default:
-			fprintf(stderr, "Unknown error, possibly a bug\n");
-			return false;
-		}
-	}
-
-	// This line is never reached.
-}
-
-
-extern int
-main(int argc, char **argv)
-{
-	bool success = true;
-	lzma_stream strm = LZMA_STREAM_INIT;
-
-	for (int i = 1; i < argc; ++i) {
-		FILE *infile = fopen(argv[i], "rb");
-
-		if (infile == NULL) {
-			fprintf(stderr, "Cannot open the file '%s': %s\n",
-					argv[i], strerror(errno));
-			success = false;
-		}
-
-		success &= print_file_size(&strm, infile, argv[i]);
-
-		(void)fclose(infile);
-	}
-
-	lzma_end(&strm);
-
-	// Close stdout to catch possible write errors that can occur
-	// when pending data is flushed from the stdio buffers.
-	if (fclose(stdout)) {
-		fprintf(stderr, "Write error: %s\n", strerror(errno));
-		success = false;
-	}
-
-	return success ? EXIT_SUCCESS : EXIT_FAILURE;
-}

doc/examples/Makefile

@@ -1,21 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-# Author: Lasse Collin
-
-CC = c99
-CFLAGS = -g
-LDFLAGS = -llzma
-
-PROGS = \
-	01_compress_easy \
-	02_decompress \
-	03_compress_custom \
-	04_compress_easy_mt \
-	11_file_info
-
-all: $(PROGS)
-
-.c:
-	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
-
-clean:
-	-rm -f $(PROGS)

doc/faq.txt

@@ -1,114 +1,193 @@
 
-XZ Utils FAQ
+LZMA Utils FAQ
-============
+--------------
 
-Q:  What do the letters XZ mean?
+    Copyright (C) 2007 Lasse Collin
 
-A:  Nothing. They are just two letters, which come from the file format
+    Copying and distribution of this file, with or without modification,
-    suffix .xz. The .xz suffix was selected, because it seemed to be
+    are permitted in any medium without royalty provided the copyright
-    pretty much unused. It has no deeper meaning.
+    notice and this notice are preserved.
 
 
-Q:  What are LZMA and LZMA2?
+Q:  What are LZMA, LZMA Utils, lzma, .lzma, liblzma, LZMA SDK, LZMA_Alone,
+    7-Zip and p7zip?
 
-A:  LZMA stands for Lempel-Ziv-Markov chain-Algorithm. It is the name
+A:  LZMA stands for Lempel-Ziv-Markov chain-Algorithm. LZMA is the name
-    of the compression algorithm designed by Igor Pavlov for 7-Zip.
+    of the compression algorithm designed by Igor Pavlov. He is the author
-    LZMA is based on LZ77 and range encoding.
+    of 7-Zip, which is a great LGPL'd compression tool for Microsoft
+    Windows operating systems. In addition to 7-Zip itself, also LZMA SDK
+    is available on the website of 7-Zip. LZMA SDK contains LZMA
+    implementations in C++, Java and C#. The C++ version is the original
+    implementation which is used also in 7-Zip itself.
 
-    LZMA2 is an updated version of the original LZMA to fix a couple of
+    Excluding the unrar plugin, 7-Zip is free software (free as in
-    practical issues. In context of XZ Utils, LZMA is called LZMA1 to
+    freedom). Thanks to this, it was possible to port it to POSIX
-    emphasize that LZMA is not the same thing as LZMA2. LZMA2 is the
+    platforms. The port was done and is maintained by myspace (TODO:
-    primary compression algorithm in the .xz file format.
+    myspace's real name?). p7zip is a port of 7-Zip's command line version;
+    p7zip doesn't include the 7-Zip's GUI.
+
+    In POSIX world, users are used to gzip and bzip2 command line tools.
+    Developers know APIs of zlib and libbzip2. LZMA Utils try to ease
+    adoption of LZMA on free operating systems by providing a compression
+    library and a set of command line tools. The library is called liblzma.
+    It provides a zlib-like API making it easy to adapt LZMA compression in
+    existing applications. The main command line tool is known as lzma,
+    whose command line syntax is very similar to that of gzip and bzip2.
+
+    The original command line tool from LZMA SDK (lzma.exe) was found from
+    a directory called LZMA_Alone in the LZMA SDK. It used a simple header
+    format in .lzma files. This format was also used by LZMA Utils up to
+    and including 4.32.x. In LZMA Utils documentation, LZMA_Alone refers
+    to both the file format and the command line tool from LZMA SDK.
+
+    Because of various limitations of the LZMA_Alone file format, a new
+    file format was developed. Extending some existing format such as .gz
+    used by gzip was considered, but these formats were found to be too
+    limited. The filename suffix for the new .lzma format is `.lzma'. The
+    same suffix is also used for files in the LZMA_Alone format. To make
+    the transition to the new format as transparent as possible, LZMA Utils
+    support both the new and old formats transparently.
+
+    7-Zip and LZMA SDK: <http://7-zip.org/>
+    p7zip: <http://p7zip.sourceforge.net/>
+    LZMA Utils: <http://tukaani.org/lzma/>
 
 
-Q:  There are many LZMA related projects. How does XZ Utils relate to them?
+Q:  What LZMA implementations there are available?
 
-A:  7-Zip and LZMA SDK are the original projects. LZMA SDK is roughly
+A:  LZMA SDK contains implementations in C++, Java and C#. The C++ version
-    a subset of the 7-Zip source tree.
+    is the original implementation which is part of 7-Zip. LZMA SDK
+    contains also a small LZMA decoder in C.
 
-    p7zip is 7-Zip's command-line tools ported to POSIX-like systems.
+    A port of LZMA SDK to Pascal was made by Alan Birtles
+    <http://www.birtles.org.uk/programming/>. It should work with
+    multiple Pascal programming language implementations.
 
-    LZMA Utils provide a gzip-like lzma tool for POSIX-like systems.
+    LZMA Utils includes liblzma, which is directly based on LZMA SDK.
-    LZMA Utils are based on LZMA SDK. XZ Utils are the successor to
+    liblzma is written in C (C99, not C89). In contrast to C++ callback
-    LZMA Utils.
+    API used by LZMA SDK, liblzma uses zlib-like stateful C API. I do not
+    want to comment whether both/former/latter/neither API(s) are good or
+    bad. The only reason to implement a zlib-like API was, that many
+    developers are already familiar with zlib, and very many applications
+    already use zlib. Having a similar API makes it easier to include LZMA
+    support in existing applications.
 
-    There are several other projects using LZMA. Most are more or less
+    See also <http://en.wikipedia.org/wiki/LZMA#External_links>.
-    based on LZMA SDK. See <https://7-zip.org/links.html>.
 
 
-Q:  Why is liblzma named liblzma if its primary file format is .xz?
+Q:  Which file formats are supported by LZMA Utils?
-    Shouldn't it be e.g. libxz?
 
-A:  When the designing of the .xz format began, the idea was to replace
+A:  Even when the raw LZMA stream is always the same, it can be wrapped
-    the .lzma format and use the same .lzma suffix. It would have been
+    in different container formats. The preferred format is the new .lzma
-    quite OK to reuse the suffix when there were very few .lzma files
+    format. It has magic bytes (the first six bytes: 0xFF 'L' 'Z' 'M'
-    around. However, the old .lzma format became popular before the
+    'A' 0x00). The format supports chaining up to seven filters, splitting
-    new format was finished. The new format was renamed to .xz but the
+    data to multiple blocks for easier multi-threading and rough
-    name of liblzma wasn't changed.
+    random-access reading. The file integrity is verified using CRC32,
+    CRC64, or SHA256, and by verifying the uncompressed size of the file.
+
+    LZMA SDK includes a tool called LZMA_Alone. It supports uses a
+    primitive header which includes only the mandatory stream information
+    required by the LZMA decoder. This format can be both read and
+    written by liblzma and the command line tool (use --format=alone to
+    create such files).
+
+    .7z is the native archive format used by 7-Zip. This format is not
+    supported by liblzma, and probably will never be supported. You
+    should use e.g. p7zip to extract .7z files.
+
+    It is possible to implement custom file formats by using raw filter
+    mode in liblzma. In this mode the application needs to store the filter
+    properties and provide them to liblzma before starting to uncompress
+    the data.
 
 
-Q:  Do XZ Utils support the .7z format?
+Q:  How can I identify files containing LZMA compressed data?
 
-A:  No. Use 7-Zip (Windows) or p7zip (POSIX-like systems) to handle .7z
+A:  The preferred filename suffix for .lzma files is `.lzma'. `.tar.lzma'
-    files.
+    may be abbreviated to `.tlz'. The same suffixes are used for files in
+    LZMA_Alone format. In practice this should be no problem since tools
+    included in LZMA Utils support both formats transparently.
+
+    Checking the magic bytes is easy way to detect files in the new .lzma
+    format (the first six bytes: 0xFF 'L' 'Z' 'M' 'A' 0x00). The "file"
+    command version FIXME contains magic strings for this format.
+
+    The old LZMA_Alone format has no magic bytes. Its header cannot contain
+    arbitrary bytes, thus it is possible to make a guess. Unfortunately the
+    guessing is usually too hard to be reliable, so don't try it unless you
+    are desperate.
 
 
-Q:  I have many .tar.7z files. Can I convert them to .tar.xz without
+Q:  Does the lzma command line tool support sparse files?
-    spending hours recompressing the data?
 
-A:  In the "extra" directory, there is a script named 7z2lzma.bash which
+A:  Sparse files can (of course) be compressed like normal files, but
-    is able to convert some .7z files to the .lzma format (not .xz). It
+    uncompression will not restore sparseness of the file. Use an archiver
-    needs the 7za (or 7z) command from p7zip. The script may silently
+    tool to take care of sparseness before compressing the data with lzma.
-    produce corrupt output if certain assumptions are not met, so
+
-    decompress the resulting .lzma file and compare it against the
+    The reason for this is that archiver tools handle files, while
-    original before deleting the original file!
+    compression tools handle streams or buffers. Being a sparse file is
+    a property of the file on the disk, not a property of the stream or
+    buffer.
 
 
-Q:  I have many .lzma files. Can I quickly convert them to the .xz format?
+Q:  Can I recover parts of a broken LZMA file (e.g. corrupted CD-R)?
 
-A:  For now, no. Since XZ Utils supports the .lzma format, it's usually
+A:  With LZMA_Alone and single-block .lzma files, you can uncompress the
-    not too bad to keep the old files in the old format. If you want to
+    file until you hit the first broken byte. The data after the broken
-    do the conversion anyway, you need to decompress the .lzma files and
+    position is lost. LZMA relies on the uncompression history, and if
-    then recompress to the .xz format.
+    bytes are missing in the middle of the file, it is impossible to
+    reliably continue after the broken section.
 
-    Technically, there is a way to make the conversion relatively fast
+    With multi-block .lzma files it may be possible to locale the next
-    (roughly twice the time that normal decompression takes). Writing
+    block in the file and continue decoding there. A limited recovery
-    such a tool would take quite a bit of time though, and would probably
+    tool for this kind of situations is planned.
-    be useful to only a few people. If you really want such a conversion
-    tool, contact Lasse Collin and offer some money.
 
 
-Q:  I have installed xz, but my tar doesn't recognize .tar.xz files.
+Q:  Is LZMA patented?
-    How can I extract .tar.xz files?
 
-A:  xz -dc foo.tar.xz | tar xf -
+A:  No, the authors are not aware of any patents that could affect LZMA.
+    However, due to nature of software patents, the authors cannot
+    guarantee, that LZMA isn't affected by any third party patent.
 
 
-Q:  Can I recover parts of a broken .xz file (e.g. a corrupted CD-R)?
+Q:  Where can I find documentation about how LZMA works as an algorithm?
 
-A:  It may be possible if the file consists of multiple blocks, which
+A:  Read the source code, Luke. There is no documentation about LZMA
-    typically is not the case if the file was created in single-threaded
+    internals. It is possible that Igor Pavlov is the only person on
-    mode. There is no recovery program yet.
+    the Earth that completely knows and understands the algorithm.
+
+    You could begin by downloading LZMA SDK, and start reading from
+    the LZMA decoder to get some idea about the bitstream format.
+    Before you begin, you should know the basics of LZ77 and
+    range coding algorithms. LZMA is based on LZ77, but LZMA is
+    *a lot* more complex. Range coding is used to compress the
+    final bitstream like Huffman coding is used in Deflate.
 
 
-Q:  Is (some part of) XZ Utils patented?
+Q:  What are filters?
 
-A:  Lasse Collin is not aware of any patents that could affect XZ Utils.
+A:  In context of .lzma files, a filter means an implementation of a
-    However, due to the nature of software patents, it's not possible to
+    compression algorithm. The primary filter is LZMA, which is why
-    guarantee that XZ Utils isn't affected by any third party patent(s).
+    the names of the tools contain the letters LZMA.
 
+    liblzma and the new .lzma format support also other filters than LZMA.
+    There are different types of filters, which are suitable for different
+    types of data. Thus, to select the optimal filter and settings, the
+    type of the input data being compressed needs to be known.
 
-Q:  Where can I find documentation about the file format and algorithms?
+    Some filters are most useful when combined with another filter like
+    LZMA. These filters increase redundancy in the data, without changing
+    the size of the data, by taking advantage of properties specific to
+    the data being compressed.
 
-A:  The .xz format is documented in xz-file-format.txt. It is a container
+    So far, all the filters are always reversible. That is, no matter what
-    format only, and doesn't include descriptions of any non-trivial
+    data you pass to a filter encoder, it can be always defiltered back to
-    filters.
+    the original form. Because of this, it is safe to compress for example
+    a software package that contains other file types than executables
+    using a filter specific to the architechture of the package being
+    compressed.
 
-    Documenting LZMA and LZMA2 is planned, but for now, there is no other
+    The old LZMA_Alone format supports only the LZMA filter.
-    documentation than the source code. Before you begin, you should know
-    the basics of LZ77 and range-coding algorithms. LZMA is based on LZ77,
-    but LZMA is a lot more complex. Range coding is used to compress
-    the final bitstream like Huffman coding is used in Deflate.
 
 
 Q:  I cannot find BCJ and BCJ2 filters. Don't they exist in liblzma?
@@ -117,128 +196,52 @@ A:  BCJ filter is called "x86" in liblzma. BCJ2 is not included,
     because it requires using more than one encoded output stream.
 
 
-Q:  I need to use a script that runs "xz -9". On a system with 256 MiB
+Q:  Can I use LZMA in proprietary, non-free applications?
-    of RAM, xz says that it cannot allocate memory. Can I make the
-    script work without modifying it?
 
-A:  Set a default memory usage limit for compression. You can do it e.g.
+A:  liblzma is under the GNU LGPL version 2.1 or (at your opinion) any
-    in a shell initialization script such as ~/.bashrc or /etc/profile:
+    later version. To summarise (*NOTE* This summary is not legally
+    binding, that is, it doesn't give you any extra permissions compared
+    to the LGPL. Read the GNU LGPL carefully for the exact license
+    conditions.):
+      * All the changes made into the library itself must be published
+        under the same license.
+      * End users must be able to replace the used liblzma. Easiest way
+        to assure this is to link dynamically against liblzma so users
+        can replace the shared library file if they want.
+      * You must make it clear to your users, that your application uses
+        liblzma, and that liblzma is free software under the GNU LGPL.
+        A copy of GNU LGPL must be included.
 
-        XZ_DEFAULTS=--memlimit-compress=150MiB
+    LZMA SDK contains a special exception which allows linking *unmodified*
-        export XZ_DEFAULTS
+    code statically with a non-free application. This exception does *not*
+    apply to liblzma.
 
-    xz will then scale the compression settings down so that the given
+    As an alternative, you can support the development of LZMA and 7-Zip
-    memory usage limit is not reached. This way xz shouldn't run out
+    by buying a proprietary license from Igor Pavlov. See homepage of
-    of memory.
+    LZMA SDK <http://7-zip.org/sdk.html> for more information. Note that
-
+    having a proprietary license from Igor Pavlov doesn't allow you to use
-    Check also that memory-related resource limits are high enough.
+    liblzma in a way that contradicts with the GNU LGPL, because liblzma
-    On most systems, "ulimit -a" will show the current resource limits.
+    contains code that is not copyrighted by Igor Pavlov. Please contact
+    both Lasse Collin and Igor Pavlov if the license conditions of liblzma
+    are not suitable for you.
 
 
-Q:  How do I create files that can be decompressed with XZ Embedded?
+Q:  I would like to help. What can I do?
 
-A:  See the documentation in XZ Embedded. In short, something like
+A:  See the TODO file. Please contact Lasse Collin before starting to do
-    this is a good start:
+    anything, because it is possible that someone else is already working
-
+    on the same thing.
-        xz --check=crc32 --lzma2=preset=6e,dict=64KiB
-
-    Or if a BCJ filter is needed too, e.g. if compressing
-    a kernel image for PowerPC:
-
-        xz --check=crc32 --powerpc --lzma2=preset=6e,dict=64KiB
-
-    Adjust the dictionary size to get a good compromise between
-    compression ratio and decompressor memory usage. Note that
-    in single-call decompression mode of XZ Embedded, a big
-    dictionary doesn't increase memory usage.
 
 
-Q:  How is multi-threaded compression implemented in XZ Utils?
+Q:  How can I contact the authors?
 
-A:  The simplest method is splitting the uncompressed data into blocks
+A:  Lasse Collin is the maintainer of LZMA Utils. You can contact him
-    and compressing them in parallel independent from each other.
+    either via IRC (Larhzu on #tukaani at Freenode or IRCnet). Email
-    This is currently the only threading method supported in XZ Utils.
+    should work too, <lasse.collin@tukaani.org>.
-    Since the blocks are compressed independently, they can also be
-    decompressed independently. Together with the index feature in .xz,
-    this allows using threads to create .xz files for random-access
-    reading. This also makes threaded decompression possible.
 
-    The independent blocks method has a couple of disadvantages too. It
+    Igor Pavlov is the father of LZMA. He is the author of 7-Zip
-    will compress worse than a single-block method. Often the difference
+    and LZMA SDK. <http://7-zip.org/>
-    is not too big (maybe 1-2 %) but sometimes it can be too big. Also,
-    the memory usage of the compressor increases linearly when adding
-    threads.
 
-    At least two other threading methods are possible but these haven't
+    NOTE: Please don't bother Igor Pavlov with questions specific
-    been implemented in XZ Utils:
+    to LZMA Utils.
-
-    Match finder parallelization has been in 7-Zip for ages. It doesn't
-    affect compression ratio or memory usage significantly. Among the
-    three threading methods, only this is useful when compressing small
-    files (files that are not significantly bigger than the dictionary).
-    Unfortunately this method scales only to about two CPU cores.
-
-    The third method is pigz-style threading (I use that name, because
-    pigz <https://www.zlib.net/pigz/> uses that method). It doesn't
-    affect compression ratio significantly and scales to many cores.
-    The memory usage scales linearly when threads are added. This isn't
-    significant with pigz, because Deflate uses only a 32 KiB dictionary,
-    but with LZMA2 the memory usage will increase dramatically just like
-    with the independent-blocks method. There is also a constant
-    computational overhead, which may make pigz-method a bit dull on
-    dual-core compared to the parallel match finder method, but with more
-    cores the overhead is not a big deal anymore.
-
-    Combining the threading methods will be possible and also useful.
-    For example, combining match finder parallelization with pigz-style
-    threading or independent-blocks-threading can cut the memory usage
-    by 50 %.
-
-
-Q:  I told xz to use many threads but it is using only one or two
-    processor cores. What is wrong?
-
-A:  Since multi-threaded compression is done by splitting the data into
-    blocks that are compressed individually, if the input file is too
-    small for the block size, then many threads cannot be used. The
-    default block size increases when the compression level is
-    increased. For example, xz -6 uses 8 MiB LZMA2 dictionary and
-    24 MiB blocks, and xz -9 uses 64 MiB LZMA dictionary and 192 MiB
-    blocks. If the input file is 100 MiB, xz -6 can use five threads
-    of which one will finish quickly as it has only 4 MiB to compress.
-    However, for the same file, xz -9 can only use one thread.
-
-    One can adjust block size with --block-size=SIZE but making the
-    block size smaller than LZMA2 dictionary is waste of RAM: using
-    xz -9 with 6 MiB blocks isn't any better than using xz -6 with
-    6 MiB blocks. The default settings use a block size bigger than
-    the LZMA2 dictionary size because this was seen as a reasonable
-    compromise between RAM usage and compression ratio.
-
-    When decompressing, the ability to use threads depends on how the
-    file was created. If it was created in multi-threaded mode then
-    it can be decompressed in multi-threaded mode too if there are
-    multiple blocks in the file.
-
-
-Q:  How do I build a program that needs liblzmadec (lzmadec.h)?
-
-A:  liblzmadec is part of LZMA Utils. XZ Utils has liblzma, but no
-    liblzmadec. The code using liblzmadec should be ported to use
-    liblzma instead. If you cannot or don't want to do that, download
-    LZMA Utils from <https://tukaani.org/lzma/>.
-
-
-Q:  The default build of liblzma is too big. How can I make it smaller?
-
-A:  Give --enable-small to the configure script. Use also appropriate
-    --enable or --disable options to include only those filter encoders
-    and decoders and integrity checks that you actually need. Use
-    CFLAGS=-Os (with GCC) or equivalent to tell your compiler to optimize
-    for size. See INSTALL for information about configure options.
-
-    If the result is still too big, take a look at XZ Embedded. It is
-    a separate project, which provides a limited but significantly
-    smaller XZ decoder implementation than XZ Utils. You can find it
-    at <https://tukaani.org/xz/embedded.html>.
 

doc/file-format.txt

@@ -1,18 +1,14 @@
 
-The .xz File Format
+The .lzma File Format
-===================
+---------------------
-
-Version 1.2.1 (2024-04-08)
-
 
         0. Preface
-           0.1. Notices and Acknowledgements
+           0.1. Copyright Notices
-           0.2. Getting the Latest Version
+           0.2. Changes
-           0.3. Version History
         1. Conventions
            1.1. Byte and Its Representation
            1.2. Multibyte Integers
-        2. Overall Structure of .xz File
+        2. Overall Structure of .lzma File
            2.1. Stream
                 2.1.1. Stream Header
                        2.1.1.1. Header Magic Bytes
@@ -34,13 +30,12 @@ Version 1.2.1 (2024-04-08)
                 3.1.6. Header Padding
                 3.1.7. CRC32
            3.2. Compressed Data
-           3.3. Block Padding
+           3.3. Check
-           3.4. Check
         4. Index
            4.1. Index Indicator
            4.2. Number of Records
            4.3. List of Records
-                4.3.1. Unpadded Size
+                4.3.1. Total Size
                 4.3.2. Uncompressed Size
            4.4. Index Padding
            4.5. CRC32
@@ -48,10 +43,11 @@ Version 1.2.1 (2024-04-08)
            5.1. Alignment
            5.2. Security
            5.3. Filters
-                5.3.1. LZMA2
+                5.3.1. LZMA
-                5.3.2. Branch/Call/Jump Filters for Executables
+                5.3.2. LZMA2
-                5.3.3. Delta
+                5.3.3. Branch/Call/Jump Filters for Executables
-                       5.3.3.1. Format of the Encoded Output
+                5.3.4. Delta
+                       5.3.4.1. Format of the Encoded Output
            5.4. Custom Filter IDs
                 5.4.1. Reserved Custom Filter ID Ranges
         6. Cyclic Redundancy Checks
@@ -60,80 +56,58 @@ Version 1.2.1 (2024-04-08)
 
 0. Preface
 
-        This document describes the .xz file format (filename suffix
+        This document describes the .lzma file format (filename suffix
-        ".xz", MIME type "application/x-xz"). It is intended that this
+        `.lzma', MIME type `application/x-lzma'). It is intended that
-        this format replace the old .lzma format used by LZMA SDK and
+        this format replace the format used by the LZMA_Alone tool
-        LZMA Utils.
+        included in LZMA SDK up to and including version 4.57.
+
+        IMPORTANT:  The version described in this document is a
+                    draft, NOT a final, official version. Changes
+                    are possible.
 
 
-0.1. Notices and Acknowledgements
+0.1. Copyright Notices
 
-        This file format was designed by Lasse Collin
+        Copyright (C) 2006-2008 Lasse Collin <lasse.collin@tukaani.org>
-        <lasse.collin@tukaani.org> and Igor Pavlov.
+        Copyright (C) 2006 Ville Koskinen <w-ber@iki.fi>
+
+        Copying and distribution of this file, with or without
+        modification, are permitted in any medium without royalty
+        provided the copyright notice and this notice are preserved.
+        Modified versions must be marked as such.
+
+        All source code examples given in this document are put into
+        the public domain by the authors of this document.
 
         Special thanks for helping with this document goes to
-        Ville Koskinen. Thanks for helping with this document goes to
+        Igor Pavlov. Thanks for helping with this document goes to
-        Mark Adler, H. Peter Anvin, Mikko Pouru, and Lars Wirzenius.
+        Mark Adler, H. Peter Anvin, and Mikko Pouru.
-
-        This document has been put into the public domain.
 
 
-0.2. Getting the Latest Version
+0.2. Changes
 
-        The latest official version of this document can be downloaded
+        Last modified: 2008-09-07 10:20+0300
-        from <https://tukaani.org/xz/xz-file-format.txt>.
 
-        Specific versions of this document have a filename
+        (A changelog will be kept once the first official version
-        xz-file-format-X.Y.Z.txt where X.Y.Z is the version number.
+        is made.)
-        For example, the version 1.0.0 of this document is available
-        at <https://tukaani.org/xz/xz-file-format-1.0.0.txt>.
-
-
-0.3. Version History
-
-        Version   Date          Description
-
-        1.2.1     2024-04-08    The URLs of this specification and
-                                XZ Utils were changed back to the
-                                original ones in Sections 0.2 and 7.
-
-        1.2.0     2024-01-19    Added RISC-V filter and updated URLs in
-                                Sections 0.2 and 7. The URL of this
-                                specification was changed.
-
-        1.1.0     2022-12-11    Added ARM64 filter and clarified 32-bit
-                                ARM endianness in Section 5.3.2,
-                                language improvements in Section 5.4
-
-        1.0.4     2009-08-27    Language improvements in Sections 1.2,
-                                2.1.1.2, 3.1.1, 3.1.2, and 5.3.1
-
-        1.0.3     2009-06-05    Spelling fixes in Sections 5.1 and 5.4
-
-        1.0.2     2009-06-04    Typo fixes in Sections 4 and 5.3.1
-
-        1.0.1     2009-06-01    Typo fix in Section 0.3 and minor
-                                clarifications to Sections 2, 2.2,
-                                3.3, 4.4, and 5.3.2
-
-        1.0.0     2009-01-14    The first official version
 
 
 1. Conventions
 
-        The key words "MUST", "MUST NOT", "REQUIRED", "SHOULD",
+        The keywords `must', `must not', `required', `should',
-        "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
+        `should not', `recommended', `may', and `optional' in this
         document are to be interpreted as described in [RFC-2119].
+        These words are not capitalized in this document.
 
         Indicating a warning means displaying a message, returning
-        appropriate exit status, or doing something else to let the
+        appropriate exit status, or something else to let the user
-        user know that something worth warning occurred. The operation
+        know that something worth warning occurred. The operation
-        SHOULD still finish if a warning is indicated.
+        should still finish if a warning is indicated.
 
         Indicating an error means displaying a message, returning
-        appropriate exit status, or doing something else to let the
+        appropriate exit status, or something else to let the user
-        user know that something prevented successfully finishing the
+        know that something prevented successfully finishing the
-        operation. The operation MUST be aborted once an error has
+        operation. The operation must be aborted once an error has
         been indicated.
 
 
@@ -141,7 +115,7 @@ Version 1.2.1 (2024-04-08)
 
         In this document, byte is always 8 bits.
 
-        A "null byte" has all bits unset. That is, the value of a null
+        A `nul byte' has all bits unset. That is, the value of a nul
         byte is 0x00.
 
         To represent byte blocks, this document uses notation that
@@ -160,25 +134,8 @@ Version 1.2.1 (2024-04-08)
             +=======+
 
         In this document, a boxed byte or a byte sequence declared
-        using this notation is called "a field". The example field
+        using this notation is called `a field'. The example field
-        above would be called "the Foo field" or plain "Foo".
+        above would be called `the Foo field' or plain `Foo'.
-
-        If there are many fields, they may be split to multiple lines.
-        This is indicated with an arrow ("--->"):
-
-            +=====+
-            | Foo |
-            +=====+
-
-                 +=====+
-            ---> | Bar |
-                 +=====+
-
-        The above is equivalent to this:
-
-            +=====+=====+
-            | Foo | Bar |
-            +=====+=====+
 
 
 1.2. Multibyte Integers
@@ -198,20 +155,19 @@ Version 1.2.1 (2024-04-08)
 
         For now, the value of the variable-length integers is limited
         to 63 bits, which limits the encoded size of the integer to
-        nine bytes. These limits may be increased in the future if
+        nine bytes. These limits may be increased in future if needed.
-        needed.
 
         The following C code illustrates encoding and decoding of
         variable-length integers. The functions return the number of
         bytes occupied by the integer (1-9), or zero on error.
 
-            #include <stddef.h>
+            #include <sys/types.h>
             #include <inttypes.h>
 
             size_t
             encode(uint8_t buf[static 9], uint64_t num)
             {
-                if (num > UINT64_MAX / 2)
+                if (num >= UINT64_MAX / 2)
                     return 0;
 
                 size_t i = 0;
@@ -239,7 +195,7 @@ Version 1.2.1 (2024-04-08)
                 size_t i = 0;
 
                 while (buf[i++] & 0x80) {
-                    if (i >= size_max || buf[i] == 0x00)
+                    if (i > size_max || buf[i] == 0x00)
                         return 0;
 
                     *num |= (uint64_t)(buf[i] & 0x7F) << (i * 7);
@@ -249,28 +205,17 @@ Version 1.2.1 (2024-04-08)
             }
 
 
-2. Overall Structure of .xz File
+2. Overall Structure of .lzma File
-
-        A standalone .xz files consist of one or more Streams which may
-        have Stream Padding between or after them:
 
         +========+================+========+================+
         | Stream | Stream Padding | Stream | Stream Padding | ...
         +========+================+========+================+
 
-        The sizes of Stream and Stream Padding are always multiples
+        A file contains usually only one Stream. However, it is
-        of four bytes, thus the size of every valid .xz file MUST be
+        possible to concatenate multiple Streams together with no
-        a multiple of four bytes.
+        additional processing. It is up to the implementation to
-
+        decide if the decoder will continue decoding from the next
-        While a typical file contains only one Stream and no Stream
+        Stream once the end of the first Stream has been reached.
-        Padding, a decoder handling standalone .xz files SHOULD support
-        files that have more than one Stream or Stream Padding.
-
-        In contrast to standalone .xz files, when the .xz file format
-        is used as an internal part of some other file format or
-        communication protocol, it usually is expected that the decoder
-        stops after the first Stream, and doesn't look for Stream
-        Padding or possibly other Streams.
 
 
 2.1. Stream
@@ -285,7 +230,7 @@ Version 1.2.1 (2024-04-08)
 
         All the above fields have a size that is a multiple of four. If
         Stream is used as an internal part of another file format, it
-        is RECOMMENDED to make the Stream start at an offset that is
+        is recommended to make the Stream start at an offset that is
         a multiple of four bytes.
 
         Stream Header, Index, and Stream Footer are always present in
@@ -294,13 +239,13 @@ Version 1.2.1 (2024-04-08)
         There are zero or more Blocks. The maximum number of Blocks is
         limited only by the maximum size of the Index field.
 
-        Total size of a Stream MUST be less than 8 EiB (2^63 bytes).
+        Total size of a Stream must be less than 8 EiB (2^63 bytes).
         The same limit applies to the total amount of uncompressed
         data stored in a Stream.
 
-        If an implementation supports handling .xz files with multiple
+        If an implementation supports handling .lzma files with
-        concatenated Streams, it MAY apply the above limits to the file
+        multiple concatenated Streams, it may apply the above limits
-        as a whole instead of limiting per Stream basis.
+        to the file as a whole instead of limiting per Stream basis.
 
 
 2.1.1. Stream Header
@@ -317,32 +262,32 @@ Version 1.2.1 (2024-04-08)
 
             Using a C array and ASCII:
             const uint8_t HEADER_MAGIC[6]
-                    = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
+                    = { 0xFF, 'L', 'Z', 'M', 'A', 0x00 };
 
             In plain hexadecimal:
-            FD 37 7A 58 5A 00
+            FF 4C 5A 4D 41 00
 
         Notes:
-          - The first byte (0xFD) was chosen so that the files cannot
+          - The first byte (0xFF) was chosen so that the files cannot
-            be erroneously detected as being in .lzma format, in which
+            be erroneously detected as being in LZMA_Alone format, in
-            the first byte is in the range [0x00, 0xE0].
+            which the first byte is in the range [0x00, 0xE0].
           - The sixth byte (0x00) was chosen to prevent applications
             from misdetecting the file as a text file.
 
-        If the Header Magic Bytes don't match, the decoder MUST
+        If the Header Magic Bytes don't match, the decoder must
         indicate an error.
 
 
 2.1.1.2. Stream Flags
 
-        The first byte of Stream Flags is always a null byte. In the
+        The first byte of Stream Flags is always a nul byte. In future
-        future, this byte may be used to indicate a new Stream version
+        this byte may be used to indicate new Stream version or other
-        or other Stream properties.
+        Stream properties.
 
         The second byte of Stream Flags is a bit field:
 
             Bit(s)  Mask  Description
-             0-3    0x0F  Type of Check (see Section 3.4):
+             0-3    0x0F  Type of Check (see Section 3.3):
                               ID    Size      Check name
                               0x00   0 bytes  None
                               0x01   4 bytes  CRC32
@@ -360,14 +305,14 @@ Version 1.2.1 (2024-04-08)
                               0x0D  64 bytes  (Reserved)
                               0x0E  64 bytes  (Reserved)
                               0x0F  64 bytes  (Reserved)
-             4-7    0xF0  Reserved for future use; MUST be zero for now.
+             4-7    0xF0  Reserved for future use; must be zero for now.
 
-        Implementations SHOULD support at least the Check IDs 0x00
+        Implementations must support at least the Check IDs 0x00 (None)
-        (None) and 0x01 (CRC32). Supporting other Check IDs is
+        and 0x01 (CRC32). Supporting other Check IDs is optional. If
-        OPTIONAL. If an unsupported Check is used, the decoder SHOULD
+        an unsupported Check is used, the decoder should indicate a
-        indicate a warning or error.
+        warning or error.
 
-        If any reserved bit is set, the decoder MUST indicate an error.
+        If any reserved bit is set, the decoder must indicate an error.
         It is possible that there is a new field present which the
         decoder is not aware of, and can thus parse the Stream Header
         incorrectly.
@@ -378,7 +323,7 @@ Version 1.2.1 (2024-04-08)
         The CRC32 is calculated from the Stream Flags field. It is
         stored as an unsigned 32-bit little endian integer. If the
         calculated value does not match the stored one, the decoder
-        MUST indicate an error.
+        must indicate an error.
 
         The idea is that Stream Flags would always be two bytes, even
         if new features are needed. This way old decoders will be able
@@ -400,7 +345,7 @@ Version 1.2.1 (2024-04-08)
         The CRC32 is calculated from the Backward Size and Stream Flags
         fields. It is stored as an unsigned 32-bit little endian
         integer. If the calculated value does not match the stored one,
-        the decoder MUST indicate an error.
+        the decoder must indicate an error.
 
         The reason to have the CRC32 field before the Backward Size and
         Stream Flags fields is to keep the four-byte fields aligned to
@@ -415,11 +360,8 @@ Version 1.2.1 (2024-04-08)
 
             real_backward_size = (stored_backward_size + 1) * 4;
 
-        If the stored value does not match the real size of the Index
+        Using a fixed-size integer to store this value makes it
-        field, the decoder MUST indicate an error.
+        slightly simpler to parse the Stream Footer when the
-
-        Using a fixed-size integer to store Backward Size makes
-        it slightly simpler to parse the Stream Footer when the
         application needs to parse the Stream backwards.
 
 
@@ -427,16 +369,16 @@ Version 1.2.1 (2024-04-08)
 
         This is a copy of the Stream Flags field from the Stream
         Header. The information stored to Stream Flags is needed
-        when parsing the Stream backwards. The decoder MUST compare
+        when parsing the Stream backwards. The decoder must compare
         the Stream Flags fields in both Stream Header and Stream
         Footer, and indicate an error if they are not identical.
 
 
 2.1.2.4. Footer Magic Bytes
 
-        As the last step of the decoding process, the decoder MUST
+        As the last step of the decoding process, the decoder must
         verify the existence of Footer Magic Bytes. If they don't
-        match, an error MUST be indicated.
+        match, an error must be indicated.
 
             Using a C array and ASCII:
             const uint8_t FOOTER_MAGIC[2] = { 'Y', 'Z' };
@@ -455,29 +397,28 @@ Version 1.2.1 (2024-04-08)
 2.2. Stream Padding
 
         Only the decoders that support decoding of concatenated Streams
-        MUST support Stream Padding.
+        must support Stream Padding.
 
-        Stream Padding MUST contain only null bytes. To preserve the
+        Stream Padding must contain only nul bytes. Any non-nul byte
-        four-byte alignment of consecutive Streams, the size of Stream
+        should be considered as the beginning of a new Stream. To
-        Padding MUST be a multiple of four bytes. Empty Stream Padding
+        preserve the four-byte alignment of consecutive Streams, the
-        is allowed. If these requirements are not met, the decoder MUST
+        size of Stream Padding must be a multiple of four bytes. Empty
-        indicate an error.
+        Stream Padding is allowed.
 
         Note that non-empty Stream Padding is allowed at the end of the
         file; there doesn't need to be a new Stream after non-empty
         Stream Padding. This can be convenient in certain situations
         [GNU-tar].
 
-        The possibility of Stream Padding MUST be taken into account
+        The possibility of Padding should be taken into account when
-        when designing an application that parses Streams backwards,
+        designing an application that parses the Stream backwards.
-        and the application supports concatenated Streams.
 
 
 3. Block
 
-        +==============+=================+===============+=======+
+        +==============+=================+=======+
-        | Block Header | Compressed Data | Block Padding | Check |
+        | Block Header | Compressed Data | Check |
-        +==============+=================+===============+=======+
+        +==============+=================+=======+
 
 
 3.1. Block Header
@@ -508,23 +449,23 @@ Version 1.2.1 (2024-04-08)
 
             real_header_size = (encoded_header_size + 1) * 4;
 
-        If a Block Header bigger than 1024 bytes is needed in the
+        If bigger Block Header is needed in future, a new field can be
-        future, a new field can be added between the Block Header and
+        added between the current Block Header and Compressed Data
-        Compressed Data fields. The presence of this new field would
+        fields. The presence of this new field would be indicated in
-        be indicated in the Block Header field.
+        the Block Header.
 
 
 3.1.2. Block Flags
 
-        The Block Flags field is a bit field:
+        The first byte of the Block Flags field is a bit field:
 
             Bit(s)  Mask  Description
              0-1    0x03  Number of filters (1-4)
-             2-5    0x3C  Reserved for future use; MUST be zero for now.
+             2-5    0x3C  Reserved for future use; must be zero for now.
               6     0x40  The Compressed Size field is present.
               7     0x80  The Uncompressed Size field is present.
 
-        If any reserved bit is set, the decoder MUST indicate an error.
+        If any reserved bit is set, the decoder must indicate an error.
         It is possible that there is a new field present which the
         decoder is not aware of, and can thus parse the Block Header
         incorrectly.
@@ -535,11 +476,14 @@ Version 1.2.1 (2024-04-08)
         This field is present only if the appropriate bit is set in
         the Block Flags field (see Section 3.1.2).
 
-        The Compressed Size field contains the size of the Compressed
+        This field contains the size of the Compressed Data field as
-        Data field, which MUST be non-zero. Compressed Size is stored
+        multiple of four bytes, minimum value being four bytes:
-        using the encoding described in Section 1.2. If the Compressed
+
-        Size doesn't match the size of the Compressed Data field, the
+            real_compressed_size = (stored_compressed_size + 1) * 4;
-        decoder MUST indicate an error.
+
+        The size is stored using the encoding described in Section 1.2.
+        If the Compressed Size does not match the real size of the
+        Compressed Data field, the decoder must indicate an error.
 
 
 3.1.4. Uncompressed Size
@@ -550,7 +494,7 @@ Version 1.2.1 (2024-04-08)
         The Uncompressed Size field contains the size of the Block
         after uncompressing. Uncompressed Size is stored using the
         encoding described in Section 1.2. If the Uncompressed Size
-        does not match the real uncompressed size, the decoder MUST
+        does not match the real uncompressed size, the decoder must
         indicate an error.
 
         Storing the Compressed Size and Uncompressed Size fields serves
@@ -589,14 +533,14 @@ Version 1.2.1 (2024-04-08)
 
         Filter IDs greater than or equal to 0x4000_0000_0000_0000
         (2^62) are reserved for implementation-specific internal use.
-        These Filter IDs MUST never be used in List of Filter Flags.
+        These Filter IDs must never be used in List of Filter Flags.
 
 
 3.1.6. Header Padding
 
-        This field contains as many null byte as it is needed to make
+        This field contains as many nul byte as it is needed to make
         the Block Header have the size specified in Block Header Size.
-        If any of the bytes are not null bytes, the decoder MUST
+        If any of the bytes are not nul bytes, the decoder must
         indicate an error. It is possible that there is a new field
         present which the decoder is not aware of, and can thus parse
         the Block Header incorrectly.
@@ -607,7 +551,7 @@ Version 1.2.1 (2024-04-08)
         The CRC32 is calculated over everything in the Block Header
         field except the CRC32 field itself. It is stored as an
         unsigned 32-bit little endian integer. If the calculated
-        value does not match the stored one, the decoder MUST indicate
+        value does not match the stored one, the decoder must indicate
         an error.
 
         By verifying the CRC32 of the Block Header before parsing the
@@ -622,39 +566,34 @@ Version 1.2.1 (2024-04-08)
         filters in Section 5.3, the format of the filter-specific
         encoded data is out of scope of this document.
 
-
+        If the natural size of Compressed Data is not a multiple of
-3.3. Block Padding
+        four bytes, it must be padded with 1-3 nul bytes to make it
-
+        a multiple of four bytes.
-        Block Padding MUST contain 0-3 null bytes to make the size of
-        the Block a multiple of four bytes. This can be needed when
-        the size of Compressed Data is not a multiple of four. If any
-        of the bytes in Block Padding are not null bytes, the decoder
-        MUST indicate an error.
 
 
-3.4. Check
+3.3. Check
 
         The type and size of the Check field depends on which bits
         are set in the Stream Flags field (see Section 2.1.1.2).
 
         The Check, when used, is calculated from the original
         uncompressed data. If the calculated Check does not match the
-        stored one, the decoder MUST indicate an error. If the selected
+        stored one, the decoder must indicate an error. If the selected
-        type of Check is not supported by the decoder, it SHOULD
+        type of Check is not supported by the decoder, it must indicate
-        indicate a warning or error.
+        a warning or error.
 
 
 4. Index
 
-        +-----------------+===================+
+        +-----------------+=========================+
-        | Index Indicator | Number of Records |
+        | Index Indicator | Number of Index Records |
-        +-----------------+===================+
+        +-----------------+=========================+
 
-             +=================+===============+-+-+-+-+
+             +=================+=========+-+-+-+-+
-        ---> | List of Records | Index Padding | CRC32 |
+        ---> | List of Records | Padding | CRC32 |
-             +=================+===============+-+-+-+-+
+             +=================+=========+-+-+-+-+
 
-        Index serves several purposes. Using it, one can
+        Index serves several purporses. Using it, one can
           - verify that all Blocks in a Stream have been processed;
           - find out the uncompressed size of a Stream; and
           - quickly access the beginning of any Block (random access).
@@ -673,7 +612,7 @@ Version 1.2.1 (2024-04-08)
         Stream. The value is stored using the encoding described in
         Section 1.2. If the decoder has decoded all the Blocks of the
         Stream, and then notices that the Number of Records doesn't
-        match the real number of Blocks, the decoder MUST indicate an
+        match the real number of Blocks, the decoder must indicate an
         error.
 
 
@@ -686,49 +625,39 @@ Version 1.2.1 (2024-04-08)
             | Record | Record | ...
             +========+========+
 
-        Each Record contains information about one Block:
+        Each Record contains two fields:
 
-            +===============+===================+
+            +============+===================+
-            | Unpadded Size | Uncompressed Size |
+            | Total Size | Uncompressed Size |
-            +===============+===================+
+            +============+===================+
 
         If the decoder has decoded all the Blocks of the Stream, it
-        MUST verify that the contents of the Records match the real
+        must verify that the contents of the Records match the real
-        Unpadded Size and Uncompressed Size of the respective Blocks.
+        Total Size and Uncompressed Size of the respective Blocks.
 
         Implementation hint: It is possible to verify the Index with
-        constant memory usage by calculating for example SHA-256 of
+        constant memory usage by calculating for example SHA256 of both
-        both the real size values and the List of Records, then
+        the real size values and the List of Records, then comparing
-        comparing the hash values. Implementing this using
+        the check values. Implementing this using non-cryptographic
-        non-cryptographic hash like CRC32 SHOULD be avoided unless
+        check like CRC32 should be avoided unless small code size is
-        small code size is important.
+        important.
 
-        If the decoder supports random-access reading, it MUST verify
+        If the decoder supports random-access reading, it must verify
-        that Unpadded Size and Uncompressed Size of every completely
+        that Total Size and Uncompressed Size of every completely
         decoded Block match the sizes stored in the Index. If only
-        partial Block is decoded, the decoder MUST verify that the
+        partial Block is decoded, the decoder must verify that the
         processed sizes don't exceed the sizes stored in the Index.
 
 
-4.3.1. Unpadded Size
+4.3.1. Total Size
 
-        This field indicates the size of the Block excluding the Block
+        This field indicates the encoded size of the respective Block
-        Padding field. That is, Unpadded Size is the size of the Block
+        as multiples of four bytes, minimum value being four bytes:
-        Header, Compressed Data, and Check fields. Unpadded Size is
-        stored using the encoding described in Section 1.2. The value
-        MUST never be zero; with the current structure of Blocks, the
-        actual minimum value for Unpadded Size is five.
 
-        Implementation note: Because the size of the Block Padding
+            real_total_size = (stored_total_size + 1) * 4;
-        field is not included in Unpadded Size, calculating the total
-        size of a Stream or doing random-access reading requires
-        calculating the actual size of the Blocks by rounding Unpadded
-        Sizes up to the next multiple of four.
 
-        The reason to exclude Block Padding from Unpadded Size is to
+        The value is stored using the encoding described in Section
-        ease making a raw copy of Compressed Data without Block
+        1.2.
-        Padding. This can be useful, for example, if someone wants
-        to convert Streams to some other file format quickly.
 
 
 4.3.2. Uncompressed Size
@@ -740,9 +669,8 @@ Version 1.2.1 (2024-04-08)
 
 4.4. Index Padding
 
-        This field MUST contain 0-3 null bytes to pad the Index to
+        This field must contain 0-3 nul bytes to pad the Index to
-        a multiple of four bytes. If any of the bytes are not null
+        a multiple of four bytes.
-        bytes, the decoder MUST indicate an error.
 
 
 4.5. CRC32
@@ -750,7 +678,7 @@ Version 1.2.1 (2024-04-08)
         The CRC32 is calculated over everything in the Index field
         except the CRC32 field itself. The CRC32 is stored as an
         unsigned 32-bit little endian integer. If the calculated
-        value does not match the stored one, the decoder MUST indicate
+        value does not match the stored one, the decoder must indicate
         an error.
 
 
@@ -776,15 +704,15 @@ Version 1.2.1 (2024-04-08)
         PowerPC executable files in the archive stream start at
         offsets that are multiples of four bytes.
 
-        Some filters, for example LZMA2, can be configured to take
+        Some filters, for example LZMA, can be configured to take
         advantage of specified alignment of input data. Note that
-        taking advantage of aligned input can be beneficial also when
+        taking advantage of aligned input can be benefical also when
         a filter is not the first filter in the chain. For example,
         if you compress PowerPC executables, you may want to use the
-        PowerPC filter and chain that with the LZMA2 filter. Because
+        PowerPC filter and chain that with the LZMA filter. Because not
-        not only the input but also the output alignment of the PowerPC
+        only the input but also the output alignment of the PowerPC
-        filter is four bytes, it is now beneficial to set LZMA2
+        filter is four bytes, it is now benefical to set LZMA settings
-        settings so that the LZMA2 encoder can take advantage of its
+        so that the LZMA encoder can take advantage of its
         four-byte-aligned input data.
 
         The output of the last filter in the chain is stored to the
@@ -821,7 +749,7 @@ Version 1.2.1 (2024-04-08)
         gets very little work done.
 
         To prevent this kind of slow files, there are restrictions on
-        how the filters can be chained. These restrictions MUST be
+        how the filters can be chained. These restrictions must be
         taken into account when designing new filters.
 
         The maximum number of filters in the chain has been limited to
@@ -829,11 +757,11 @@ Version 1.2.1 (2024-04-08)
         Of these three non-last filters, only two are allowed to change
         the size of the data.
 
-        The non-last filters, that change the size of the data, MUST
+        The non-last filters, that change the size of the data, must
         have a limit how much the decoder can compress the data: the
-        decoder SHOULD produce at least n bytes of output when the
+        decoder should produce at least n bytes of output when the
         filter is given 2n bytes of input. This  limit is not
-        absolute, but significant deviations MUST be avoided.
+        absolute, but significant deviations must be avoided.
 
         The above limitations guarantee that if the last filter in the
         chain produces 4n bytes of output, the chain as a whole will
@@ -842,18 +770,78 @@ Version 1.2.1 (2024-04-08)
 
 5.3. Filters
 
-5.3.1. LZMA2
+5.3.1. LZMA
 
-        LZMA (Lempel-Ziv-Markov chain-Algorithm) is a general-purpose
+        LZMA (Lempel-Ziv-Markov chain-Algorithm) is a general-purporse
         compression algorithm with high compression ratio and fast
         decompression. LZMA is based on LZ77 and range coding
         algorithms.
 
-        LZMA2 is an extension on top of the original LZMA. LZMA2 uses
+            Filter ID:                  0x20
+            Size of Filter Properties:  5 bytes
+            Changes size of data:       Yes
+            Allow as a non-last filter: No
+            Allow as the last filter:   Yes
+
+            Preferred alignment:
+                Input data:             Adjustable to 1/2/4/8/16 byte(s)
+                Output data:            1 byte
+
+        At the time of writing, there is no other documentation about
+        how LZMA works than the source code in LZMA SDK. Once such
+        documentation gets written, it will probably be published as
+        a separate document, because including the documentation here
+        would lengthen this document considerably.
+
+        The format of the Filter Properties field is as follows:
+
+            +-----------------+----+----+----+----+
+            | LZMA Properties |  Dictionary Size  |
+            +-----------------+----+----+----+----+
+
+        The LZMA Properties field contains three properties. An
+        abbreviation is given in parentheses, followed by the value
+        range of the property. The field consists of
+
+            1) the number of literal context bits (lc, [0, 4]);
+            2) the number of literal position bits (lp, [0, 4]); and
+            3) the number of position bits (pb, [0, 4]).
+
+        In addition to above ranges, the sum of lc and lp must not
+        exceed four. Note that this limit didn't exist in the old
+        LZMA_Alone format, which allowed lc to be in the range [0, 8].
+
+        The properties are encoded using the following formula:
+
+            LZMA Properties = (pb * 5 + lp) * 9 + lc
+
+        The following C code illustrates a straightforward way to
+        decode the properties:
+
+            uint8_t lc, lp, pb;
+            uint8_t prop = get_lzma_properties();
+            if (prop > (4 * 5 + 4) * 9 + 8)
+                return LZMA_PROPERTIES_ERROR;
+
+            pb = prop / (9 * 5);
+            prop -= pb * 9 * 5;
+            lp = prop / 9;
+            lc = prop - lp * 9;
+
+            if (lc + lp > 4)
+                return LZMA_PROPERTIES_ERROR;
+
+        Dictionary Size is encoded as unsigned 32-bit little endian
+        integer.
+
+
+5.3.2. LZMA2
+
+        LZMA2 is an extensions on top of the original LZMA. LZMA2 uses
         LZMA internally, but adds support for flushing the encoder,
         uncompressed chunks, eases stateful decoder implementations,
-        and improves support for multithreading. Thus, the plain LZMA
+        and improves support for multithreading. For most uses, it is
-        will not be supported in this file format.
+        recommended to use LZMA2 instead of LZMA.
 
             Filter ID:                  0x21
             Size of Filter Properties:  1 byte
@@ -870,7 +858,7 @@ Version 1.2.1 (2024-04-08)
 
             Bits   Mask   Description
             0-5    0x3F   Dictionary Size
-            6-7    0xC0   Reserved for future use; MUST be zero for now.
+            6-7    0xC0   Reserved for future use; must be zero for now.
 
         Dictionary Size is encoded with one-bit mantissa and five-bit
         exponent. The smallest dictionary size is 4 KiB and the biggest
@@ -908,7 +896,7 @@ Version 1.2.1 (2024-04-08)
             }
 
 
-5.3.2. Branch/Call/Jump Filters for Executables
+5.3.3. Branch/Call/Jump Filters for Executables
 
         These filters convert relative branch, call, and jump
         instructions to their absolute counterparts in executable
@@ -920,6 +908,11 @@ Version 1.2.1 (2024-04-08)
             Allow as a non-last filter: Yes
             Allow as the last filter:   No
 
+            Detecting when all of the data has been decoded:
+                Uncompressed size:      Yes
+                End of Payload Marker:  No
+                End of Input:           Yes
+
         Below is the list of filters in this category. The alignment
         is the same for both input and output data.
 
@@ -927,37 +920,23 @@ Version 1.2.1 (2024-04-08)
               0x04       1 byte     x86 filter (BCJ)
               0x05       4 bytes    PowerPC (big endian) filter
               0x06      16 bytes    IA64 filter
-              0x07       4 bytes    ARM filter [1]
+              0x07       4 bytes    ARM (little endian) filter
-              0x08       2 bytes    ARM Thumb filter [1]
+              0x08       2 bytes    ARM Thumb (little endian) filter
               0x09       4 bytes    SPARC filter
-              0x0A       4 bytes    ARM64 filter [2]
-              0x0B       2 bytes    RISC-V filter
-
-              [1] These are for little endian instruction encoding.
-                  This must not be confused with data endianness.
-                  A processor configured for big endian data access
-                  may still use little endian instruction encoding.
-                  The filters don't care about the data endianness.
-
-              [2] 4096-byte alignment gives the best results
-                  because the address in the ADRP instruction
-                  is a multiple of 4096 bytes.
 
         If the size of Filter Properties is four bytes, the Filter
         Properties field contains the start offset used for address
         conversions. It is stored as an unsigned 32-bit little endian
-        integer. The start offset MUST be a multiple of the alignment
+        integer. If the size of Filter Properties is zero, the start
-        of the filter as listed in the table above; if it isn't, the
+        offset is zero.
-        decoder MUST indicate an error. If the size of Filter
-        Properties is zero, the start offset is zero.
 
         Setting the start offset may be useful if an executable has
         multiple sections, and there are many cross-section calls.
         Taking advantage of this feature usually requires usage of
-        the Subblock filter, whose design is not complete yet.
+        the Subblock filter.
 
 
-5.3.3. Delta
+5.3.4. Delta
 
         The Delta filter may increase compression ratio when the value
         of the next byte correlates with the value of an earlier byte
@@ -978,7 +957,7 @@ Version 1.2.1 (2024-04-08)
         distance of 1 byte and 0xFF distance of 256 bytes.
 
 
-5.3.3.1. Format of the Encoded Output
+5.3.4.1. Format of the Encoded Output
 
         The code below illustrates both encoding and decoding with
         the Delta filter.
@@ -1011,20 +990,20 @@ Version 1.2.1 (2024-04-08)
 
 5.4. Custom Filter IDs
 
-        If a developer wants to use custom Filter IDs, there are two
+        If a developer wants to use custom Filter IDs, he has two
         choices. The first choice is to contact Lasse Collin and ask
         him to allocate a range of IDs for the developer.
 
-        The second choice is to generate a 40-bit random integer
+        The second choice is to generate a 40-bit random integer,
-        which the developer can use as a personal Developer ID.
+        which the developer can use as his personal Developer ID.
-        To minimize the risk of collisions, Developer ID has to be
+        To minimalize the risk of collisions, Developer ID has to be
         a randomly generated integer, not manually selected "hex word".
         The following command, which works on many free operating
         systems, can be used to generate Developer ID:
 
             dd if=/dev/urandom bs=5 count=1 | hexdump
 
-        The developer can then use the Developer ID to create unique
+        The developer can then use his Developer ID to create unique
         (well, hopefully unique) Filter IDs.
 
             Bits    Mask                    Description
@@ -1041,7 +1020,6 @@ Version 1.2.1 (2024-04-08)
 5.4.1. Reserved Custom Filter ID Ranges
 
         Range                       Description
-        0x0000_0300 - 0x0000_04FF   Reserved to ease .7z compatibility
         0x0002_0000 - 0x0007_FFFF   Reserved to ease .7z compatibility
         0x0200_0000 - 0x07FF_FFFF   Reserved to ease .7z compatibility
 
@@ -1051,14 +1029,14 @@ Version 1.2.1 (2024-04-08)
         There are several incompatible variations to calculate CRC32
         and CRC64. For simplicity and clarity, complete examples are
         provided to calculate the checks as they are used in this file
-        format. Implementations MAY use different code as long as it
+        format. Implementations may use different code as long as it
         gives identical results.
 
         The program below reads data from standard input, calculates
         the CRC32 and CRC64 values, and prints the calculated values
         as big endian hexadecimal strings to standard output.
 
-            #include <stddef.h>
+            #include <sys/types.h>
             #include <inttypes.h>
             #include <stdio.h>
 
@@ -1124,8 +1102,7 @@ Version 1.2.1 (2024-04-08)
                 uint8_t buf[8192];
 
                 while (1) {
-                    const size_t buf_size
+                    const size_t buf_size = fread(buf, 1, 8192, stdin);
-                            = fread(buf, 1, sizeof(buf), stdin);
                     if (buf_size == 0)
                         break;
 
@@ -1145,30 +1122,27 @@ Version 1.2.1 (2024-04-08)
 7. References
 
         LZMA SDK - The original LZMA implementation
-        https://7-zip.org/sdk.html
+        http://7-zip.org/sdk.html
 
         LZMA Utils - LZMA adapted to POSIX-like systems
-        https://tukaani.org/lzma/
+        http://tukaani.org/lzma/
-
-        XZ Utils - The next generation of LZMA Utils
-        https://tukaani.org/xz/
 
         [RFC-1952]
         GZIP file format specification version 4.3
-        https://www.ietf.org/rfc/rfc1952.txt
+        http://www.ietf.org/rfc/rfc1952.txt
-          - Notation of byte boxes in section "2.1. Overall conventions"
+          - Notation of byte boxes in section `2.1. Overall conventions'
 
         [RFC-2119]
         Key words for use in RFCs to Indicate Requirement Levels
-        https://www.ietf.org/rfc/rfc2119.txt
+        http://www.ietf.org/rfc/rfc2119.txt
 
         [GNU-tar]
-        GNU tar 1.35 manual
+        GNU tar 1.16.1 manual
-        https://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
+        http://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
-          - Node 9.4.2 "Blocking Factor", paragraph that begins
+          - Node 9.4.2 `Blocking Factor', paragraph that begins
-            "gzip will complain about trailing garbage"
+            `gzip will complain about trailing garbage'
           - Note that this URL points to the latest version of the
             manual, and may some day not contain the note which is in
-            1.35. For the exact version of the manual, download GNU
+            1.16.1. For the exact version of the manual, download GNU
-            tar 1.35: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.35.tar.gz
+            tar 1.16.1: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.16.1.tar.gz
 

doc/history.txt

@@ -1,24 +1,24 @@
 
-History of LZMA Utils and XZ Utils
+LZMA Utils history
-==================================
+------------------
 
 Tukaani distribution
 
-    In 2005, there was a small group working on the Tukaani distribution,
+    In 2005, there was a small group working on Tukaani distribution, which
-    which was a Slackware fork. One of the project's goals was to fit the
+    was a Slackware fork. One of the project goals was to fit the distro on
-    distro on a single 700 MiB ISO-9660 image. Using LZMA instead of gzip
+    a single 700 MiB ISO-9660 image. Using LZMA instead of gzip helped a
-    helped a lot. Roughly speaking, one could fit data that took 1000 MiB
+    lot. Roughly speaking, one could fit data that took 1000 MiB in gzipped
-    in gzipped form into 700 MiB with LZMA. Naturally, the compression
+    form into 700 MiB with LZMA. Naturally compression ratio varied across
-    ratio varied across packages, but this was what we got on average.
+    packages, but this was what we got on average.
 
     Slackware packages have traditionally had .tgz as the filename suffix,
     which is an abbreviation of .tar.gz. A logical naming for LZMA
     compressed packages was .tlz, being an abbreviation of .tar.lzma.
 
-    At the end of the year 2007, there was no distribution under the
+    At the end of the year 2007, there's no distribution under the Tukaani
-    Tukaani project anymore, but development of LZMA Utils was kept going.
+    project anymore. Development of LZMA Utils still continues. Still,
-    Still, there were .tlz packages around, because at least Vector Linux
+    there are .tlz packages around, because at least Vector Linux (a
-    (a Slackware based distribution) used LZMA for its packages.
+    Slackware based distribution) uses LZMA for its packages.
 
     First versions of the modified pkgtools used the LZMA_Alone tool from
     Igor Pavlov's LZMA SDK as is. It was fine, because users wouldn't need
@@ -30,13 +30,13 @@ Tukaani distribution
 First steps of LZMA Utils
 
     The first version of LZMA Utils (4.22.0) included a shell script called
-    lzmash. It was a wrapper that had a gzip-like command-line interface. It
+    lzmash. It was wrapper that had gzip-like command line interface. It
     used the LZMA_Alone tool from LZMA SDK to do all the real work. zgrep,
-    zdiff, and related scripts from gzip were adapted to work with LZMA and
+    zdiff, and related scripts from gzip were adapted work with LZMA and
     were part of the first LZMA Utils release too.
 
     LZMA Utils 4.22.0 included also lzmadec, which was a small (less than
-    10 KiB) decoder-only command-line tool. It was written on top of the
+    10 KiB) decoder-only command line tool. It was written on top of the
     decoder-only C code found from the LZMA SDK. lzmadec was convenient in
     situations where LZMA_Alone (a few hundred KiB) would be too big.
 
@@ -48,103 +48,93 @@ Second generation
     The lzmash script was an ugly and not very secure hack. The last
     version of LZMA Utils to use lzmash was 4.27.1.
 
-    LZMA Utils 4.32.0beta1 introduced a new lzma command-line tool written
+    LZMA Utils 4.32.0beta1 introduced a new lzma command line tool written
     by Ville Koskinen. It was written in C++, and used the encoder and
-    decoder from C++ LZMA SDK with some little modifications. This tool
+    decoder from C++ LZMA SDK with little modifications. This tool replaced
-    replaced both the lzmash script and the LZMA_Alone command-line tool
+    both the lzmash script and the LZMA_Alone command line tool in LZMA
-    in LZMA Utils.
+    Utils.
 
     Introducing this new tool caused some temporary incompatibilities,
-    because the LZMA_Alone executable was simply named lzma like the new
+    because LZMA_Alone executable was simply named lzma like the new
-    command-line tool, but they had a completely different command-line
+    command line tool, but they had completely different command line
     interface. The file format was still the same.
 
-    Lasse wrote liblzmadec, which was a small decoder-only library based
+    Lasse wrote liblzmadec, which was a small decoder-only library based on
-    on the C code found from LZMA SDK. liblzmadec had an API similar to
+    the C code found from LZMA SDK. liblzmadec had API similar to zlib,
-    zlib, although there were some significant differences, which made it
+    although there were some significant differences, which made it
     non-trivial to use it in some applications designed for zlib and
     libbzip2.
 
-    The lzmadec command-line tool was converted to use liblzmadec.
+    The lzmadec command line tool was converted to use liblzmadec.
 
-    Alexandre Sauvé helped converting the build system to use GNU
+    Alexandre Sauvé helped converting build system to use GNU Autotools.
-    Autotools. This made it easier to test for certain less portable
+    This made is easier to test for certain less portable features needed
-    features needed by the new command-line tool.
+    by the new command line tool.
 
-    Since the new command-line tool never got completely finished (for
+    Since the new command line tool never got completely finished (for
-    example, it didn't support the LZMA_OPT environment variable), the
+    example, it didn't support LZMA_OPT environment variable), the intent
-    intent was to not call 4.32.x stable. Similarly, liblzmadec wasn't
+    was to not call 4.32.x stable. Similarly, liblzmadec wasn't polished,
-    polished, but appeared to work well enough, so some people started
+    but appeared to work well enough, so some people started using it too.
-    using it too.
 
     Because the development of the third generation of LZMA Utils was
-    delayed considerably (3-4 years), the 4.32.x branch had to be kept
+    delayed considerably (roughly two years), the 4.32.x branch had to be
-    maintained. It got some bug fixes now and then, and finally it was
+    kept maintained. It got some bug fixes now and then, and finally it was
     decided to call it stable, although most of the missing features were
     never added.
 
 
 File format problems
 
-    The file format used by LZMA_Alone was primitive. It was designed with
+    The file format used by LZMA_Alone was primitive. It was designed for
-    embedded systems in mind, and thus provided only a minimal set of
+    embedded systems in mind, and thus provided only minimal set of
-    features. The two biggest problems for non-embedded use were the lack
+    features. The two biggest problems for non-embedded use were lack of
-    of magic bytes and an integrity check.
+    magic bytes and integrity check.
 
-    Igor and Lasse started developing a new file format with some help
+    Igor and Lasse started developing a new file format with some help from
-    from Ville Koskinen. Also Mark Adler, Mikko Pouru, H. Peter Anvin,
+    Ville Koskinen, Mark Adler and Mikko Pouru. Designing the new format
-    and Lars Wirzenius helped with some minor things at some point of the
+    took quite a long time. It was mostly because Lasse was quite slow at
-    development. Designing the new format took quite a long time (actually,
+    getting things done due to personal reasons.
-    too long a time would be a more appropriate expression). It was mostly
-    because Lasse was quite slow at getting things done due to personal
-    reasons.
 
-    Originally the new format was supposed to use the same .lzma suffix
+    Near the end of the year 2007 the new format was practically finished.
-    that was already used by the old file format. Switching to the new
+    Compared to LZMA_Alone format and the .gz format used by gzip, the new
-    format wouldn't have caused much trouble when the old format wasn't
+    .lzma format is quite complex as a whole. This means that tools having
-    used by many people. But since the development of the new format took
+    *full* support for the new format would be larger and more complex than
-    such a long time, the old format got quite popular, and it was decided
+    the tools supporting only the old LZMA_Alone format.
-    that the new file format must use a different suffix.
 
-    It was decided to use .xz as the suffix of the new file format. The
+    For the situations where the full support for the .lzma format wouldn't
-    first stable .xz file format specification was finally released in
+    be required (embedded systems, operating system kernels), the new
-    December 2008. In addition to fixing the most obvious problems of
+    format has a well-defined subset, which is easy to support with small
-    the old .lzma format, the .xz format added some new features like
+    amount of code. It wouldn't be as small as an implementation using the
-    support for multiple filters (compression algorithms), filter chaining
+    LZMA_Alone format, but the difference shouldn't be significant.
-    (like piping on the command line), and limited random-access reading.
 
-    Currently the primary compression algorithm used in .xz is LZMA2.
+    The new .lzma format allows dividing the data in multiple independent
-    It is an extension on top of the original LZMA to fix some practical
+    blocks, which can be compressed and uncompressed independenly. This
-    problems: LZMA2 adds support for flushing the encoder, uncompressed
+    makes multi-threading possible with algorithms that aren't inherently
-    chunks, eases stateful decoder implementations, and improves support
+    parallel (such as LZMA). There's also a central index of the sizes of
-    for multithreading. Since LZMA2 is better than the original LZMA, the
+    the blocks, which makes it possible to do limited random-access reading
-    original LZMA is not supported in .xz.
+    with granularity of the block size.
+
+    The new .lzma format uses the same filename suffix that was used for
+    LZMA_Alone files. The advantage is that users using the new tools won't
+    notice the change to the new format. The disadvantage is that the old
+    tools won't work with the new files.
 
 
-Transition to XZ Utils
+Third generation
 
-    The early versions of XZ Utils were called LZMA Utils. The first
+    LZMA Utils 4.42.0alphas drop the rest of the C++ LZMA SDK. The LZMA and
-    releases were 4.42.0alphas. They dropped the rest of the C++ LZMA SDK.
+    other included filters (algorithm implementations) are still directly
-    The code was still directly based on LZMA SDK but ported to C and
+    based on LZMA SDK, but ported to C.
-    converted from a callback API to a stateful API. Later, Igor Pavlov
-    made a C version of the LZMA encoder too; these ports from C++ to C
-    were independent in LZMA SDK and LZMA Utils.
 
-    The core of the new LZMA Utils was liblzma, a compression library with
+    liblzma is now the core of LZMA Utils. It has zlib-like API, which
-    a zlib-like API. liblzma supported both the old and new file format.
+    doesn't suffer from the problems of the API of liblzmadec. liblzma
-    The gzip-like lzma command-line tool was rewritten to use liblzma.
+    supports not only LZMA, but several other filters, which together
+    can improve compression ratio even further with certain file types.
 
-    The new LZMA Utils code base was renamed to XZ Utils when the name
+    The lzma and lzmadec command line tools have been rewritten. They uses
-    of the new file format had been decided. The liblzma compression
+    liblzma to do the actual compressing or uncompressing.
-    library retained its name though, because changing it would have
-    caused unnecessary breakage in applications already using the early
-    liblzma snapshots.
 
-    The xz command-line tool can emulate the gzip-like lzma tool by
+    The development of LZMA Utils 4.42.x is still in alpha stage. Several
-    creating appropriate symlinks (e.g. lzma -> xz). Thus, practically
+    features are still missing or don't fully work yet. Documentation is
-    all scripts using the lzma tool from LZMA Utils will work as is with
+    also very minimal.
-    XZ Utils (and will keep using the old .lzma format). Still, the .lzma
-    format is more or less deprecated. XZ Utils will keep supporting it,
-    but new applications should use the .xz format, and migrating old
-    applications to .xz is often a good idea too.
 

doc/liblzma-advanced.txt

@@ -0,0 +1,324 @@
+
+Advanced features of liblzma
+----------------------------
+
+0. Introduction
+
+    Most developers need only the basic features of liblzma. These
+    features allow single-threaded encoding and decoding of .lzma files
+    in streamed mode.
+
+    In some cases developers want more. The .lzma file format is
+    designed to allow multi-threaded encoding and decoding and limited
+    random-access reading. These features are possible in non-streamed
+    mode and limitedly also in streamed mode.
+
+    To take advange of these features, the application needs a custom
+    .lzma file format handler. liblzma provides a set of tools to ease
+    this task, but it's still quite a bit of work to get a good custom
+    .lzma handler done.
+
+
+1. Where to begin
+
+    Start by reading the .lzma file format specification. Understanding
+    the basics of the .lzma file structure is required to implement a
+    custom .lzma file handler and to understand the rest of this document.
+
+
+2. The basic components
+
+2.1. Stream Header and tail
+
+    Stream Header begins the .lzma Stream and Stream tail ends it. Stream
+    Header is defined in the file format specification, but Stream tail
+    isn't (thus I write "tail" with a lower-case letter). Stream tail is
+    simply the Stream Flags and the Footer Magic Bytes fields together.
+    It was done this way in liblzma, because the Block coders take care
+    of the rest of the stuff in the Stream Footer.
+
+    For now, the size of Stream Header is fixed to 11 bytes. The header
+    <lzma/stream_flags.h> defines LZMA_STREAM_HEADER_SIZE, which you
+    should use instead of a hardcoded number. Similarly, Stream tail
+    is fixed to 3 bytes, and there is a constant LZMA_STREAM_TAIL_SIZE.
+
+    It is possible, that a future version of the .lzma format will have
+    variable-sized Stream Header and tail. As of writing, this seems so
+    unlikely though, that it was considered simplest to just use a
+    constant instead of providing a functions to get and store the sizes
+    of the Stream Header and tail.
+
+
+2.x. Stream tail
+
+    For now, the size of Stream tail is fixed to 3 bytes. The header
+    <lzma/stream_flags.h> defines LZMA_STREAM_TAIL_SIZE, which you
+    should use instead of a hardcoded number.
+
+
+3. Keeping track of size information
+
+    The lzma_info_* functions found from <lzma/info.h> should ease the
+    task of keeping track of sizes of the Blocks and also the Stream
+    as a whole. Using these functions is strongly recommended, because
+    there are surprisingly many situations where an error can occur,
+    and these functions check for possible errors every time some new
+    information becomes available.
+
+    If you find lzma_info_* functions lacking something that you would
+    find useful, please contact the author.
+
+
+3.1. Start offset of the Stream
+
+    If you are storing the .lzma Stream inside anothe file format, or
+    for some other reason are placing the .lzma Stream to somewhere
+    else than to the beginning of the file, you should tell the starting
+    offset of the Stream using lzma_info_start_offset_set().
+
+    The start offset of the Stream is used for two distinct purporses.
+    First, knowing the start offset of the Stream allows
+    lzma_info_alignment_get() to correctly calculate the alignment of
+    every Block. This information is given to the Block encoder, which
+    will calculate the size of Header Padding so that Compressed Data
+    is alignment at an optimal offset.
+
+    Another use for start offset of the Stream is in random-access
+    reading. If you set the start offset of the Stream, lzma_info_locate()
+    will be able to calculate the offset relative to the beginning of the
+    file containing the Stream (instead of offset relative to the
+    beginning of the Stream).
+
+
+3.2. Size of Stream Header
+
+    While the size of Stream Header is constant (11 bytes) in the current
+    version of the .lzma file format, this may change in future.
+
+
+3.3. Size of Header Metadata Block
+
+    This information is needed when doing random-access reading, and
+    to verify the value of this field stored in Footer Metadata Block.
+
+
+3.4. Total Size of the Data Blocks
+
+
+3.5. Uncompressed Size of Data Blocks
+
+
+3.6. Index
+
+
+
+
+x. Alignment
+
+    There are a few slightly different types of alignment issues when
+    working with .lzma files.
+
+    The .lzma format doesn't strictly require any kind of alignment.
+    However, if the encoder carefully optimizes the alignment in all
+    situations, it can improve compression ratio, speed of the encoder
+    and decoder, and slightly help if the files get damaged and need
+    recovery.
+
+    Alignment has the most significant effect compression ratio FIXME
+
+
+x.1. Compression ratio
+
+    Some filters take advantage of the alignment of the input data.
+    To get the best compression ratio, make sure that you feed these
+    filters correctly aligned data.
+
+    Some filters (e.g. LZMA) don't necessarily mind too much if the
+    input doesn't match the preferred alignment. With these filters
+    the penalty in compression ratio depends on the specific type of
+    data being compressed.
+
+    Other filters (e.g. PowerPC executable filter) won't work at all
+    with data that is improperly aligned. While the data can still
+    be de-filtered back to its original form, the benefit of the
+    filtering (better compression ratio) is completely lost, because
+    these filters expect certain patterns at properly aligned offsets.
+    The compression ratio may even worse with incorrectly aligned input
+    than without the filter.
+
+
+x.1.1. Inter-filter alignment
+
+    When there are multiple filters chained, checking the alignment can
+    be useful not only with the input of the first filter and output of
+    the last filter, but also between the filters.
+
+    Inter-filter alignment important especially with the Subblock filter.
+
+
+x.1.2. Further compression with external tools
+
+    This is relatively rare situation in practice, but still worth
+    understanding.
+
+    Let's say that there are several SPARC executables, which are each
+    filtered to separate .lzma files using only the SPARC filter. If
+    Uncompressed Size is written to the Block Header, the size of Block
+    Header may vary between the .lzma files. If no Padding is used in
+    the Block Header to correct the alignment, the starting offset of
+    the Compressed Data field will be differently aligned in different
+    .lzma files.
+
+    All these .lzma files are archived into a single .tar archive. Due
+    to nature of the .tar format, every file is aligned inside the
+    archive to an offset that is a multiple of 512 bytes.
+
+    The .tar archive is compressed into a new .lzma file using the LZMA
+    filter with options, that prefer input alignment of four bytes. Now
+    if the independent .lzma files don't have the same alignment of
+    the Compressed Data fields, the LZMA filter will be unable to take
+    advantage of the input alignment between the files in the .tar
+    archive, which reduces compression ratio.
+
+    Thus, even if you have only single Block per file, it can be good for
+    compression ratio to align the Compressed Data to optimal offset.
+
+
+x.2. Speed
+
+    Most modern computers are faster when multi-byte data is located
+    at aligned offsets in RAM. Proper alignment of the Compressed Data
+    fields can slightly increase the speed of some filters.
+
+
+x.3. Recovery
+
+    Aligning every Block Header to start at an offset with big enough
+    alignment may ease or at least speed up recovery of broken files.
+
+
+y. Typical usage cases
+
+y.x. Parsing the Stream backwards
+
+    You may need to parse the Stream backwards if you need to get
+    information such as the sizes of the Stream, Index, or Extra.
+    The basic procedure to do this follows.
+
+    Locate the end of the Stream. If the Stream is stored as is in a
+    standalone .lzma file, simply seek to the end of the file and start
+    reading backwards using appropriate buffer size. The file format
+    specification allows arbitrary amount of Footer Padding (zero or more
+    NUL bytes), which you skip before trying to decode the Stream tail.
+
+    Once you have located the end of the Stream (a non-NULL byte), make
+    sure you have at least the last LZMA_STREAM_TAIL_SIZE bytes of the
+    Stream in a buffer. If there isn't enough bytes left from the file,
+    the file is too small to contain a valid Stream. Decode the Stream
+    tail using lzma_stream_tail_decoder(). Store the offset of the first
+    byte of the Stream tail; you will need it later.
+
+    You may now want to do some internal verifications e.g. if the Check
+    type is supported by the liblzma build you are using.
+
+    Decode the Backward Size field with lzma_vli_reverse_decode(). The
+    field is at maximum of LZMA_VLI_BYTES_MAX bytes long. Check that
+    Backward Size is not zero. Store the offset of the first byte of
+    the Backward Size; you will need it later.
+
+    Now you know the Total Size of the last Block of the Stream. It's the
+    value of Backward Size plus the size of the Backward Size field. Note
+    that you cannot use lzma_vli_size() to calculate the size since there
+    might be padding; you need to use the real observed size of the
+    Backward Size field.
+
+    At this point, the operation continues differently for Single-Block
+    and Multi-Block Streams.
+
+
+y.x.1. Single-Block Stream
+
+    There might be Uncompressed Size field present in the Stream Footer.
+    You cannot know it for sure unless you have already parsed the Block
+    Header earlier. For security reasons, you probably want to try to
+    decode the Uncompressed Size field, but you must not indicate any
+    error if decoding fails. Later you can give the decoded Uncompressed
+    Size to Block decoder if Uncopmressed Size isn't otherwise known;
+    this prevents it from producing too much output in case of (possibly
+    intentionally) corrupt file.
+
+    Calculate the start offset of the Stream:
+
+        backward_offset - backward_size - LZMA_STREAM_HEADER_SIZE
+
+    backward_offset is the offset of the first byte of the Backward Size
+    field. Remember to check for integer overflows, which can occur with
+    invalid input files.
+
+    Seek to the beginning of the Stream. Decode the Stream Header using
+    lzma_stream_header_decoder(). Verify that the decoded Stream Flags
+    match the values found from Stream tail. You can use the
+    lzma_stream_flags_is_equal() macro for this.
+
+    Decode the Block Header. Verify that it isn't a Metadata Block, since
+    Single-Block Streams cannot have Metadata. If Uncompressed Size is
+    present in the Block Header, the value you tried to decode from the
+    Stream Footer must be ignored, since Uncompressed Size wasn't actually
+    present there. If Block Header doesn't have Uncompressed Size, and
+    decoding the Uncompressed Size field from the Stream Footer failed,
+    the file is corrupt.
+
+    If you were only looking for the Uncompressed Size of the Stream,
+    you now got that information, and you can stop processing the Stream.
+
+    To decode the Block, the same instructions apply as described in
+    FIXME. However, because you have some extra known information decoded
+    from the Stream Footer, you should give this information to the Block
+    decoder so that it can verify it while decoding:
+      - If Uncompressed Size is not present in the Block Header, set
+        lzma_options_block.uncompressed_size to the value you decoded
+        from the Stream Footer.
+      - Always set lzma_options_block.total_size to backward_size +
+        size_of_backward_size (you calculated this sum earlier already).
+
+
+y.x.2. Multi-Block Stream
+
+    Calculate the start offset of the Footer Metadata Block:
+
+        backward_offset - backward_size
+
+    backward_offset is the offset of the first byte of the Backward Size
+    field. Remember to check for integer overflows, which can occur with
+    broken input files.
+
+    Decode the Block Header. Verify that it is a Metadata Block. Set
+    lzma_options_block.total_size to backward_size + size_of_backward_size
+    (you calculated this sum earlier already). Then decode the Footer
+    Metadata Block.
+
+    Store the decoded Footer Metadata to lzma_info structure using
+    lzma_info_set_metadata(). Set also the offset of the Backward Size
+    field using lzma_info_size_set(). Then you can get the start offset
+    of the Stream using lzma_info_size_get(). Note that any of these steps
+    may fail so don't omit error checking.
+
+    Seek to the beginning of the Stream. Decode the Stream Header using
+    lzma_stream_header_decoder(). Verify that the decoded Stream Flags
+    match the values found from Stream tail. You can use the
+    lzma_stream_flags_is_equal() macro for this.
+
+    If you were only looking for the Uncompressed Size of the Stream,
+    it's possible that you already have it now. If Uncompressed Size (or
+    whatever information you were looking for) isn't available yet,
+    continue by decoding also the Header Metadata Block. (If some
+    information is missing, the Header Metadata Block has to be present.)
+
+    Decoding the Data Blocks goes the same way as described in FIXME.
+
+
+y.x.3. Variations
+
+    If you know the offset of the beginning of the Stream, you may want
+    to parse the Stream Header before parsing the Stream tail.
+

doc/liblzma-hacking.txt

@@ -0,0 +1,112 @@
+
+Hacking liblzma
+---------------
+
+0. Preface
+
+    This document gives some overall information about the internals of
+    liblzma, which should make it easier to start reading and modifying
+    the code.
+
+
+1. Programming language
+
+    liblzma was written in C99. If you use GCC, this means that you need
+    at least GCC 3.x.x. GCC 2 isn't and won't be supported.
+
+    Some GCC-specific extensions are used *conditionally*. They aren't
+    required to build a full-featured library. Don't make the code rely
+    on any non-standard compiler extensions or even C99 features that
+    aren't portable between almost-C99 compatible compilers (for example
+    non-static inlines).
+
+    The public API headers are in C89. This is to avoid frustrating those
+    who maintain programs, which are strictly in C89 or C++.
+
+    An assumption about sizeof(size_t) is made. If this assumption is
+    wrong, some porting is probably needed:
+
+        sizeof(uint32_t) <= sizeof(size_t) <= sizeof(uint64_t)
+
+
+2. Internal vs. external API
+
+
+
+        Input                         Output
+          v     Application             ^
+          |     liblzma public API      |
+          |     Stream coder            |
+          |     Block coder             |
+          |     Filter coder            |
+          |     ...                     |
+          v     Filter coder            ^
+
+
+        Application
+          `-- liblzma public API
+                `-- Stream coder
+                      |-- Stream info handler
+                      |-- Stream Header coder
+                      |-- Block Header coder
+                      |     `-- Filter Flags coder
+                      |-- Metadata coder
+                      |     `-- Block coder
+                      |           `-- Filter 0
+                      |                 `-- Filter 1
+                      |                     ...
+                      |-- Data Block coder
+                      |     `-- Filter 0
+                      |           `-- Filter 1
+                      |               ...
+                      `-- Stream tail coder
+
+
+
+x. Designing new filters
+
+    All filters must be designed so that the decoder cannot consume
+    arbitrary amount input without producing any decoded output. Failing
+    to follow this rule makes liblzma vulnerable to DoS attacks if
+    untrusted files are decoded (usually they are untrusted).
+
+    An example should clarify the reason behind this requirement: There
+    are two filters in the chain. The decoder of the first filter produces
+    huge amount of output (many gigabytes or more) with a few bytes of
+    input, which gets passed to the decoder of the second filter. If the
+    data passed to the second filter is interpreted as something that
+    produces no output (e.g. padding), the filter chain as a whole
+    produces no output and consumes no input for a long period of time.
+
+    The above problem was present in the first versions of the Subblock
+    filter. A tiny .lzma file could have taken several years to decode
+    while it wouldn't produce any output at all. The problem was fixed
+    by adding limits for number of consecutive Padding bytes, and requiring
+    that some decoded output must be produced between Set Subfilter and
+    Unset Subfilter.
+
+
+x. Implementing new filters
+
+    If the filter supports embedding End of Payload Marker, make sure that
+    when your filter detects End of Payload Marker,
+      - the usage of End of Payload Marker is actually allowed (i.e. End
+        of Input isn't used); and
+      - it also checks that there is no more input coming from the next
+        filter in the chain.
+
+    The second requirement is slightly tricky. It's possible that the next
+    filter hasn't returned LZMA_STREAM_END yet. It may even need a few
+    bytes more input before it will do so. You need to give it as much
+    input as it needs, and verify that it doesn't produce any output.
+
+    Don't call the next filter in the chain after it has returned
+    LZMA_STREAM_END (except in encoder if action == LZMA_SYNC_FLUSH).
+    It will result undefined behavior.
+
+    Be pedantic. If the input data isn't exactly valid, reject it.
+
+    At the moment, liblzma isn't modular. You will need to edit several
+    files in src/liblzma/common to include support for a new filter. grep
+    for LZMA_FILTER_LZMA to locate the files needing changes.
+

doc/liblzma-intro.txt

@@ -0,0 +1,194 @@
+
+Introduction to liblzma
+-----------------------
+
+Writing applications to work with liblzma
+
+    liblzma API is split in several subheaders to improve readability and
+    maintainance. The subheaders must not be #included directly. lzma.h
+    requires that certain integer types and macros are available when
+    the header is #included. On systems that have inttypes.h that conforms
+    to C99, the following will work:
+
+        #include <sys/types.h>
+        #include <inttypes.h>
+        #include <lzma.h>
+
+    Those who have used zlib should find liblzma's API easy to use.
+    To developers who haven't used zlib before, I recommend learning
+    zlib first, because zlib has excellent documentation.
+
+    While the API is similar to that of zlib, there are some major
+    differences, which are summarized below.
+
+    For basic stream encoding, zlib has three functions (deflateInit(),
+    deflate(), and deflateEnd()). Similarly, there are three functions
+    for stream decoding (inflateInit(), inflate(), and inflateEnd()).
+    liblzma has only single coding and ending function. Thus, to
+    encode one may use, for example, lzma_stream_encoder_single(),
+    lzma_code(), and lzma_end(). Simlarly for decoding, one may
+    use lzma_auto_decoder(), lzma_code(), and lzma_end().
+
+    zlib has deflateReset() and inflateReset() to reset the stream
+    structure without reallocating all the memory. In liblzma, all
+    coder initialization functions are like zlib's reset functions:
+    the first-time initializations are done with the same functions
+    as the reinitializations (resetting).
+
+    To make all this work, liblzma needs to know when lzma_stream
+    doesn't already point to an allocated and initialized coder.
+    This is achieved by initializing lzma_stream structure with
+    LZMA_STREAM_INIT (static initialization) or LZMA_STREAM_INIT_VAR
+    (for exampple when new lzma_stream has been allocated with malloc()).
+    This initialization should be done exactly once per lzma_stream
+    structure to avoid leaking memory. Calling lzma_end() will leave
+    lzma_stream into a state comparable to the state achieved with
+    LZMA_STREAM_INIT and LZMA_STREAM_INIT_VAR.
+
+    Example probably clarifies a lot. With zlib, compression goes
+    roughly like this:
+
+        z_stream strm;
+        deflateInit(&strm, level);
+        deflate(&strm, Z_RUN);
+        deflate(&strm, Z_RUN);
+        ...
+        deflate(&strm, Z_FINISH);
+        deflateEnd(&strm) or deflateReset(&strm)
+
+    With liblzma, it's slightly different:
+
+        lzma_stream strm = LZMA_STREAM_INIT;
+        lzma_stream_encoder_single(&strm, &options);
+        lzma_code(&strm, LZMA_RUN);
+        lzma_code(&strm, LZMA_RUN);
+        ...
+        lzma_code(&strm, LZMA_FINISH);
+        lzma_end(&strm) or reinitialize for new coding work
+
+     Reinitialization in the last step can be any function that can
+     initialize lzma_stream; it doesn't need to be the same function
+     that was used for the previous initialization. If it is the same
+     function, liblzma will usually be able to re-use most of the
+     existing memory allocations (depends on how much the initialization
+     options change). If you reinitialize with different function,
+     liblzma will automatically free the memory of the previous coder.
+
+
+File formats
+
+    liblzma supports multiple container formats for the compressed data.
+    Different initialization functions initialize the lzma_stream to
+    process different container formats. See the details from the public
+    header files.
+
+    The following functions are the most commonly used:
+
+      - lzma_stream_encoder_single(): Encodes Single-Block Stream; this
+        the recommended format for most purporses.
+
+      - lzma_alone_encoder(): Useful if you need to encode into the
+        legacy LZMA_Alone format.
+
+      - lzma_auto_decoder(): Decoder that automatically detects the
+        file format; recommended when you decode compressed files on
+        disk, because this way compatibility with the legacy LZMA_Alone
+        format is transparent.
+
+      - lzma_stream_decoder(): Decoder for Single- and Multi-Block
+        Streams; this is good if you want to accept only .lzma Streams.
+
+
+Filters
+
+    liblzma supports multiple filters (algorithm implementations). The new
+    .lzma format supports filter-chain having up to seven filters. In the
+    filter chain, the output of one filter is input of the next filter in
+    the chain. The legacy LZMA_Alone format supports only one filter, and
+    that must always be LZMA.
+
+        General-purporse compression:
+
+            LZMA        The main algorithm of liblzma (surprise!)
+
+        Branch/Call/Jump filters for executables:
+
+            x86         This filter is known as BCJ in 7-Zip
+            IA64        IA-64 (Itanium)
+            PowerPC     Big endian PowerPC
+            ARM
+            ARM-Thumb
+            SPARC
+
+        Other filters:
+
+            Copy        Dummy filter that simply copies all the data
+                        from input to output.
+
+            Subblock    Multi-purporse filter, that can
+                          - embed End of Payload Marker if the previous
+                            filter in the chain doesn't support it; and
+                          - apply Subfilters, which filter only part
+                            of the same compressed Block in the Stream.
+
+    Branch/Call/Jump filters never change the size of the data. They
+    should usually be used as a pre-filter for some compression filter
+    like LZMA.
+
+
+Integrity checks
+
+    The .lzma Stream format uses CRC32 as the integrity check for
+    different file format headers. It is possible to omit CRC32 from
+    the Block Headers, but not from Stream Header. This is the reason
+    why CRC32 code cannot be disabled when building liblzma (in addition,
+    the LZMA encoder uses CRC32 for hashing, so that's another reason).
+
+    The integrity check of the actual data is calculated from the
+    uncompressed data. This check can be CRC32, CRC64, or SHA256.
+    It can also be omitted completely, although that usually is not
+    a good thing to do. There are free IDs left, so support for new
+    checks algorithms can be added later.
+
+
+API and ABI stability
+
+    The API and ABI of liblzma isn't stable yet, although no huge
+    changes should happen. One potential place for change is the
+    lzma_options_subblock structure.
+
+    In the 4.42.0alpha phase, the shared library version number won't
+    be updated even if ABI breaks. I don't want to track the ABI changes
+    yet. Just rebuild everything when you upgrade liblzma until we get
+    to the beta stage.
+
+
+Size of the library
+
+    While liblzma isn't huge, it is quite far from the smallest possible
+    LZMA implementation: full liblzma binary (with support for all
+    filters and other features) is way over 100 KiB, but the plain raw
+    LZMA decoder is only 5-10 KiB.
+
+    To decrease the size of the library, you can omit parts of the library
+    by passing certain options to the `configure' script. Disabling
+    everything but the decoders of the require filters will usually give
+    you a small enough library, but if you need a decoder for example
+    embedded in the operating system kernel, the code from liblzma probably
+    isn't suitable as is.
+
+    If you need a minimal implementation supporting .lzma Streams, you
+    may need to do partial rewrite. liblzma uses stateful API like zlib.
+    That increases the size of the library. Using callback API or even
+    simpler buffer-to-buffer API would allow smaller implementation.
+
+    LZMA SDK contains smaller LZMA decoder written in ANSI-C than
+    liblzma, so you may want to take a look at that code. However,
+    it doesn't (at least not yet) support the new .lzma Stream format.
+
+
+Documentation
+
+    There's no other documentation than the public headers and this
+    text yet. Real docs will be written some day, I hope.
+

doc/liblzma-security.txt

@@ -0,0 +1,219 @@
+
+Using liblzma securely
+----------------------
+
+0. Introduction
+
+    This document discusses how to use liblzma securely. There are issues
+    that don't apply to zlib or libbzip2, so reading this document is
+    strongly recommended even for those who are very familiar with zlib
+    or libbzip2.
+
+    While making liblzma itself as secure as possible is essential, it's
+    out of scope of this document.
+
+
+1. Memory usage
+
+    The memory usage of liblzma varies a lot.
+
+
+1.1. Problem sources
+
+1.1.1. Block coder
+
+    The memory requirements of Block encoder depend on the used filters
+    and their settings. The memory requirements of the Block decoder
+    depend on the which filters and with which filter settings the Block
+    was encoded. Usually the memory requirements of a decoder are equal
+    or less than the requirements of the encoder with the same settings.
+
+    While the typical memory requirements to decode a Block is from a few
+    hundred kilobytes to tens of megabytes, a maliciously constructed
+    files can require a lot more RAM to decode. With the current filters,
+    the maximum amount is about 7 GiB. If you use multi-threaded decoding,
+    every Block can require this amount of RAM, thus a four-threaded
+    decoder could suddenly try to allocate 28 GiB of RAM.
+
+    If you don't limit the maximum memory usage in any way, and there are
+    no resource limits set on the operating system side, one malicious
+    input file can run the system out of memory, or at least make it swap
+    badly for a long time. This is exceptionally bad on servers e.g.
+    email server doing virus scanning on incoming messages.
+
+
+1.1.2. Metadata decoder
+
+    Multi-Block .lzma files contain at least one Metadata Block.
+    Externally the Metadata Blocks are similar to Data Blocks, so all
+    the issues mentioned about memory usage of Data Blocks applies to
+    Metadata Blocks too.
+
+    The uncompressed content of Metadata Blocks contain information about
+    the Stream as a whole, and optionally some Extra Records. The
+    information about the Stream is kept in liblzma's internal data
+    structures in RAM. Extra Records can contain arbitrary data. They are
+    not interpreted by liblzma, but liblzma will provide them to the
+    application in uninterpreted form if the application wishes so.
+
+    Usually the Uncompressed Size of a Metadata Block is small. Even on
+    extreme cases, it shouldn't be much bigger than a few megabytes. Once
+    the Metadata has been parsed into native data structures in liblzma,
+    it usually takes a little more memory than in the encoded form. For
+    all normal files, this is no problem, since the resulting memory usage
+    won't be too much.
+
+    The problem is that a maliciously constructed Metadata Block can
+    contain huge amount of "information", which liblzma will try to store
+    in its internal data structures. This may cause liblzma to allocate
+    all the available RAM unless some kind of resource usage limits are
+    applied.
+
+    Note that the Extra Records in Metadata are always parsed but, but
+    memory is allocated for them only if the application has requested
+    liblzma to provide the Extra Records to the application.
+
+
+1.2. Solutions
+
+    If you need to decode files from untrusted sources (most people do),
+    you must limit the memory usage to avoid denial of service (DoS)
+    conditions caused by malicious input files.
+
+    The first step is to find out how much memory you are allowed consume
+    at maximum. This may be a hardcoded constant or derived from the
+    available RAM; whatever is appropriate in the application.
+
+    The simplest solution is to use setrlimit() if the kernel supports
+    RLIMIT_AS, which limits the memory usage of the whole process.
+    For more portable and fine-grained limiting, you can use
+    memory limiter functions found from <lzma/memlimit.h>.
+
+
+1.2.1. Encoder
+
+    lzma_memory_usage() will give you a rough estimate about the memory
+    usage of the given filter chain. To dramatically simplify the internal
+    implementation, this function doesn't take into account all the small
+    helper data structures needed in various places; only the structures
+    with significant memory usage are taken into account. Still, the
+    accuracy of this function should be well within a mebibyte.
+
+    The Subblock filter is a special case. If a Subfilter has been
+    specified, it isn't taken into account when lzma_memory_usage()
+    calculates the memory usage. You need to calculate the memory usage
+    of the Subfilter separately.
+
+    Keeping track of Blocks in a Multi-Block Stream takes a few dozen
+    bytes of RAM per Block (size of the lzma_index structure plus overhead
+    of malloc()). It isn't a good idea to put tens of thousands of Blocks
+    into a Stream unless you have a very good reason to do so (compressed
+    dictionary could be an example of such situation).
+
+    Also keep the number and sizes of Extra Records sane. If you produce
+    the list of Extra Records automatically from some untrusted source,
+    you should not only validate the content of these Records, but also
+    their memory usage.
+
+
+1.2.2. Decoder
+
+    A single-threaded decoder should simply use a memory limiter and
+    indicate an error if it runs out of memory.
+
+    Memory-limiting with multi-threaded decoding is tricky. The simple
+    solution is to divide the maximum allowed memory usage with the
+    maximum allowed threads, and give each Block decoder their own
+    independent lzma_memory_limiter. The drawback is that if one Block
+    needs notably more RAM than any other Block, the decoder will run out
+    of memory when in reality there would be plenty of free RAM.
+
+    An attractive alternative would be using shared lzma_memory_limiter.
+    Depending on the application and the expected type of input, this may
+    either be the best solution or a source of hard-to-repeat problems.
+    Consider the following requirements:
+      - You use a maximum of n threads.
+      - x(i) is the decoder memory requirements of the Block number i
+        in an expected input Stream.
+      - The memory limiter is set to higher value than the sum of n
+        highest values x(i).
+
+    (If you are better at explaining the above conditions, please
+    contribute your improved version.)
+
+    If the above conditions aren't met, it is possible that the decoding
+    will fail unpredictably. That is, on the same machine using the same
+    settings, the decoding may sometimes succeed and sometimes fail. This
+    is because sometimes threads may run so that the Blocks with highest
+    memory usage are tried to be decoded at the same time.
+
+    Most .lzma files have all the Blocks encoded with identical settings,
+    or at least the memory usage won't vary dramatically. That's why most
+    multi-threaded decoders probably want to use the simple "separate
+    lzma_memory_limiter for each thread" solution, possibly falling back
+    to single-threaded mode in case the per-thread memory limits aren't
+    enough in multi-threaded mode.
+
+FIXME: Memory usage of Stream info.
+
+[
+
+]
+
+
+2. Huge uncompressed output
+
+2.1. Data Blocks
+
+    Decoding a tiny .lzma file can produce huge amount of uncompressed
+    output. There is an example file of 45 bytes, which decodes to 64 PiB
+    (that's 2^56 bytes). Uncompressing such a file to disk is likely to
+    fill even a bigger disk array. If the data is written to a pipe, it
+    may not fill the disk, but would still take very long time to finish.
+
+    To avoid denial of service conditions caused by huge amount of
+    uncompressed output, applications using liblzma should use some method
+    to limit the amount of output produced. The exact method depends on
+    the application.
+
+    All valid .lzma Streams make it possible to find out the uncompressed
+    size of the Stream without actually uncompressing the data. This
+    information is available in at least one of the Metadata Blocks.
+    Once the uncompressed size is parsed, the decoder can verify that
+    it doesn't exceed certain limits (e.g. available disk space).
+
+    When the uncompressed size is known, the decoder can actively keep
+    track of the amount of output produced so far, and that it doesn't
+    exceed the known uncompressed size. If it does exceed, the file is
+    known to be corrupt and an error should be indicated without
+    continuing to decode the rest of the file.
+
+    Unfortunately, finding the uncompressed size beforehand is often
+    possible only in non-streamed mode, because the needed information
+    could be in the Footer Metdata Block, which (obviously) is at the
+    end of the Stream. In purely streamed mode decoding, one may need to
+    use some rough arbitrary limits to prevent the problems described in
+    the beginning of this section.
+
+
+2.2. Metadata
+
+    Metadata is stored in Metadata Blocks, which are very similar to
+    Data Blocks. Thus, the uncompressed size can be huge just like with
+    Data Blocks. The difference is, that the contents of Metadata Blocks
+    aren't given to the application as is, but parsed by liblzma. Still,
+    reading through a huge Metadata can take very long time, effectively
+    creating a denial of service like piping decoded a Data Block to
+    another process would do.
+
+    At first it would seem that using a memory limiter would prevent
+    this issue as a side effect. But it does so only if the application
+    requests liblzma to allocate the Extra Records and provide them to
+    the application. If Extra Records aren't requested, they aren't
+    allocated either. Still, the Extra Records are being read through
+    to validate that the Metadata is in proper format.
+
+    The solution is to limit the Uncompressed Size of a Metadata Block
+    to some relatively large value. This will make liblzma to give an
+    error when the given limit is reached.
+

doc/lzma-file-format.txt

@@ -1,173 +0,0 @@
-
-The .lzma File Format
-=====================
-
-        0. Preface
-           0.1. Notices and Acknowledgements
-           0.2. Changes
-        1. File Format
-           1.1. Header
-                1.1.1. Properties
-                1.1.2. Dictionary Size
-                1.1.3. Uncompressed Size
-           1.2. LZMA Compressed Data
-        2. References
-
-
-0. Preface
-
-        This document describes the .lzma file format, which is
-        sometimes also called LZMA_Alone format. It is a legacy file
-        format, which is being or has been replaced by the .xz format.
-        The MIME type of the .lzma format is `application/x-lzma'.
-
-        The most commonly used software to handle .lzma files are
-        LZMA SDK, LZMA Utils, 7-Zip, and XZ Utils. This document
-        describes some of the differences between these implementations
-        and gives hints what subset of the .lzma format is the most
-        portable.
-
-
-0.1. Notices and Acknowledgements
-
-        This file format was designed by Igor Pavlov for use in
-        LZMA SDK. This document was written by Lasse Collin
-        <lasse.collin@tukaani.org> using the documentation found
-        from the LZMA SDK.
-
-        This document has been put into the public domain.
-
-
-0.2. Changes
-
-        Last modified: 2024-04-08 17:35+0300
-
-        From version 2011-04-12 11:55+0300 to 2022-07-13 21:00+0300:
-        The section 1.1.3 was modified to allow End of Payload Marker
-        with a known Uncompressed Size.
-
-
-1. File Format
-
-        +-+-+-+-+-+-+-+-+-+-+-+-+-+==========================+
-        |         Header          |   LZMA Compressed Data   |
-        +-+-+-+-+-+-+-+-+-+-+-+-+-+==========================+
-
-        The .lzma format file consist of 13-byte Header followed by
-        the LZMA Compressed Data.
-
-        Unlike the .gz, .bz2, and .xz formats, it is not possible to
-        concatenate multiple .lzma files as is and expect the
-        decompression tool to decode the resulting file as if it were
-        a single .lzma file.
-
-        For example, the command line tools from LZMA Utils and
-        LZMA SDK silently ignore all the data after the first .lzma
-        stream. In contrast, the command line tool from XZ Utils
-        considers the .lzma file to be corrupt if there is data after
-        the first .lzma stream.
-
-
-1.1. Header
-
-        +------------+----+----+----+----+--+--+--+--+--+--+--+--+
-        | Properties |  Dictionary Size  |   Uncompressed Size   |
-        +------------+----+----+----+----+--+--+--+--+--+--+--+--+
-
-
-1.1.1. Properties
-
-        The Properties field contains three properties. An abbreviation
-        is given in parentheses, followed by the value range of the
-        property. The field consists of
-
-            1) the number of literal context bits (lc, [0, 8]);
-            2) the number of literal position bits (lp, [0, 4]); and
-            3) the number of position bits (pb, [0, 4]).
-
-        The properties are encoded using the following formula:
-
-            Properties = (pb * 5 + lp) * 9 + lc
-
-        The following C code illustrates a straightforward way to
-        decode the Properties field:
-
-            uint8_t lc, lp, pb;
-            uint8_t prop = get_lzma_properties();
-            if (prop > (4 * 5 + 4) * 9 + 8)
-                return LZMA_PROPERTIES_ERROR;
-
-            pb = prop / (9 * 5);
-            prop -= pb * 9 * 5;
-            lp = prop / 9;
-            lc = prop - lp * 9;
-
-        XZ Utils has an additional requirement: lc + lp <= 4. Files
-        which don't follow this requirement cannot be decompressed
-        with XZ Utils. Usually this isn't a problem since the most
-        common lc/lp/pb values are 3/0/2. It is the only lc/lp/pb
-        combination that the files created by LZMA Utils can have,
-        but LZMA Utils can decompress files with any lc/lp/pb.
-
-
-1.1.2. Dictionary Size
-
-        Dictionary Size is stored as an unsigned 32-bit little endian
-        integer. Any 32-bit value is possible, but for maximum
-        portability, only sizes of 2^n and 2^n + 2^(n-1) should be
-        used.
-
-        LZMA Utils creates only files with dictionary size 2^n,
-        16 <= n <= 25. LZMA Utils can decompress files with any
-        dictionary size.
-
-        XZ Utils creates and decompresses .lzma files only with
-        dictionary sizes 2^n and 2^n + 2^(n-1). If some other
-        dictionary size is specified when compressing, the value
-        stored in the Dictionary Size field is a rounded up, but the
-        specified value is still used in the actual compression code.
-
-
-1.1.3. Uncompressed Size
-
-        Uncompressed Size is stored as unsigned 64-bit little endian
-        integer. A special value of 0xFFFF_FFFF_FFFF_FFFF indicates
-        that Uncompressed Size is unknown. End of Payload Marker (*)
-        is used if Uncompressed Size is unknown. End of Payload Marker
-        is allowed but rarely used if Uncompressed Size is known.
-        XZ Utils 5.2.5 and older don't support .lzma files that have
-        End of Payload Marker together with a known Uncompressed Size.
-
-        XZ Utils rejects files whose Uncompressed Size field specifies
-        a known size that is 256 GiB or more. This is to reject false
-        positives when trying to guess if the input file is in the
-        .lzma format. When Uncompressed Size is unknown, there is no
-        limit for the uncompressed size of the file.
-
-        (*) Some tools use the term End of Stream (EOS) marker
-            instead of End of Payload Marker.
-
-
-1.2. LZMA Compressed Data
-
-        Detailed description of the format of this field is out of
-        scope of this document.
-
-
-2. References
-
-        LZMA SDK - The original LZMA implementation
-        https://7-zip.org/sdk.html
-
-        7-Zip
-        https://7-zip.org/
-
-        LZMA Utils - LZMA adapted to POSIX-like systems
-        https://tukaani.org/lzma/
-
-        XZ Utils - The next generation of LZMA Utils
-        https://tukaani.org/xz/
-
-        The .xz file format - The successor of the .lzma format
-        https://tukaani.org/xz/xz-file-format.txt
-

doc/lzma-intro.txt

@@ -0,0 +1,107 @@
+
+Introduction to the lzma command line tool
+------------------------------------------
+
+Overview
+
+    The lzma command line tool is similar to gzip and bzip2, but for
+    compressing and uncompressing .lzma files.
+
+
+Supported file formats
+
+    By default, the tool creates files in the new .lzma format. This can
+    be overriden with --format=FMT command line option. Use --format=alone
+    to create files in the old LZMA_Alone format.
+
+    By default, the tool uncompresses both the new .lzma format and
+    LZMA_Alone format. This is to make it transparent to switch from
+    the old LZMA_Alone format to the new .lzma format. Since both
+    formats use the same filename suffix, average user should never
+    notice which format was used.
+
+
+Differences to gzip and bzip2
+
+  Standard input and output
+
+    Both gzip and bzip2 refuse to write compressed data to a terminal and
+    read compressed data from a terminal. With gzip (but not with bzip2),
+    this can be overriden with the `--force' option. lzma follows the
+    behavior of gzip here.
+
+  Usage of LZMA_OPT environment variable
+
+    gzip and bzip2 read GZIP and BZIP2 environment variables at startup.
+    These variables may contain extra command line options.
+
+    gzip and bzip2 allow passing not only options, but also end-of-options
+    indicator (`--') and filenames via the environment variable. No quoting
+    is supported with the filenames.
+
+    Here are examples with gzip. bzip2 behaves identically.
+
+        bash$ echo asdf > 'foo bar'
+        bash$ GZIP='"foo bar"' gzip
+        gzip: "foo: No such file or directory
+        gzip: bar": No such file or directory
+
+        bash$ GZIP=-- gzip --help
+        gzip: --help: No such file or directory
+
+    lzma silently ignores all non-option arguments given via the
+    environment variable LZMA_OPT. Like on the command line, everything
+    after `--' is taken as non-options, and thus ignored in LZMA_OPT.
+
+        bash$ LZMA_OPT='--help' lzma --version     # Displays help
+        bash$ LZMA_OPT='-- --help' lzma --version  # Displays version
+
+
+Filter chain presets
+
+    Like in gzip and bzip2, lzma supports numbered presets from 1 to 9
+    where 1 is the fastest and 9 the best compression. 1 and 2 are for
+    fast compressing with small memory usage, 3 to 6 for good compression
+    ratio with medium memory usage, and 7 to 9 for excellent compression
+    ratio with higher memory requirements. The default is 7 if memory
+    usage limit allows.
+
+    In future, there will probably be an option like --preset=NAME, which
+    will contain more special presets for specific file types.
+
+    It's also possible that there will be some heuristics to select good
+    filters. For example, the tool could detect when a .tar archive is
+    being compressed, and enable x86 filter only for those files in the
+    .tar archive that are ELF or PE executables for x86.
+
+
+Specifying custom filter chains
+
+    Custom filter chains are specified by using long options with the name
+    of the filters in correct order. For example, to pass the input data to
+    the x86 filter and the output of that to the LZMA filter, the following
+    command will do:
+
+        lzma --x86 --lzma filename
+
+    Some filters accept options, which are specified as a comma-separated
+    list of key=value pairs:
+
+        lzma --delta=distance=4 --lzma=dict=4Mi,lc=8,lp=2 filename
+
+
+Memory usage control
+
+    By default, the command line tool limits memory usage to 1/3 of the
+    available physical RAM. If no preset or custom filter chain has been
+    given, the default preset will be used. If the memory limit is too
+    low for the default preset, the tool will silently switch to lower
+    preset.
+
+    When a preset or a custom filter chain has been specified and the
+    memory limit is too low, an error message is displayed and no files
+    are processed.
+
+    If the decoder hits the memory usage limit, an error is displayed and
+    no more files are processed.
+

dos/INSTALL.txt

@@ -1,78 +0,0 @@
-
-Building XZ Utils for DOS
-=========================
-
-Introduction
-
-    This document explains how to build XZ Utils for DOS using DJGPP.
-    The resulting binaries should run at least on various DOS versions
-    and under Windows 95/98/98SE/ME.
-
-    This is somewhat experimental and has got very little testing.
-
-    Note: Makefile and config.h are updated only now and then. This
-    means that if you checked out a development version, building for
-    DOS might not work without updating Makefile and config.h first.
-
-
-Getting and Installing DJGPP
-
-    You may use <https://www.delorie.com/djgpp/zip-picker.html> to help
-    deciding what to download. If you are only interested in building
-    XZ Utils, the zip-picker may list files that you don't strictly
-    need. However, using the zip-picker can still be worth it to get a
-    nice short summary of installation instructions (they can be found
-    from readme.1st too).
-
-    For a more manual method, first select a mirror from
-    <https://www.delorie.com/djgpp/getting.html> and go the
-    subdirectory named "current". You need the following files:
-
-        unzip32.exe  (if you don't already have a LFN-capable unzipper)
-        v2/djdev205.zip
-        v2gnu/bnu234b.zip
-        v2gnu/gcc920b.zip
-        v2gnu/mak43b.zip
-        v2misc/csdpmi7b.zip
-
-    If newer versions are available, probably you should try them first.
-    Note that versions older than djdev205.zip aren't supported. Also
-    note that you want csdpmi7b.zip even if you run under Windows or
-    DOSEMU because the XZ Utils Makefile will embed cwsdstub.exe to
-    the resulting xz.exe.
-
-    See the instructions in readme.1st found from djdev205.zip. Here's
-    a short summary, but you should still read readme.1st.
-
-        C:\> mkdir DJGPP
-        C:\> cd DJGPP
-        C:\DJGPP> c:\download\unzip32 c:\download\djdev205.zip
-        C:\DJGPP> c:\download\unzip32 c:\download\bnu234b.zip
-        C:\DJGPP> c:\download\unzip32 c:\download\gcc920b.zip
-        C:\DJGPP> c:\download\unzip32 c:\download\mak43b.zip
-        C:\DJGPP> c:\download\unzip32 c:\download\csdpmi7b.zip
-
-        C:\DJGPP> set PATH=C:\DJGPP\BIN;%PATH%
-        C:\DJGPP> set DJGPP=C:\DJGPP\DJGPP.ENV
-
-    You may want to add the last two lines into AUTOEXEC.BAT or have,
-    for example, DJGPP.BAT which you can run before using DJGPP.
-
-    Make sure you use completely upper case path in the DJGPP environment
-    variable. This is not required by DJGPP, but the XZ Utils Makefile is
-    a bit stupid and expects that everything in DJGPP environment variable
-    is uppercase.
-
-
-Building
-
-    You need to have an environment that supports long filenames (LFN).
-    Once you have built XZ Utils, the resulting binaries can be run
-    without long filename support.
-
-    Run "make" in this directory (the directory containing this
-    INSTALL.txt). You should get xz.exe (and a bunch of temporary files).
-    Other tools are not built. Having e.g. xzdec.exe doesn't save much
-    space compared to xz.exe because the DJGPP runtime makes the .exe
-    quite big anyway.
-

dos/Makefile

@@ -1,150 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-###############################################################################
-#
-# Makefile to build XZ Utils using DJGPP
-#
-# Author: Lasse Collin
-#
-###############################################################################
-
-# For debugging, set comment "#define NDEBUG 1" from config.h to enable
-# the assert() macro, set STRIP=rem to disable stripping, and finally
-# e.g. CFLAGS="-g -O0".
-CC = gcc
-STRIP = strip
-CPPFLAGS =
-CFLAGS = -g -Wall -Wextra -Wfatal-errors -march=i386 -mtune=i686 -O2
-LDFLAGS = -lemu
-
-ALL_CFLAGS = -std=gnu99
-
-ALL_CPPFLAGS = \
-	-I. \
-	-I../lib \
-	-I../src/common \
-	-I../src/liblzma/api \
-	-I../src/liblzma/common \
-	-I../src/liblzma/check \
-	-I../src/liblzma/rangecoder \
-	-I../src/liblzma/lz \
-	-I../src/liblzma/lzma \
-	-I../src/liblzma/delta \
-	-I../src/liblzma/simple \
-	-DHAVE_CONFIG_H
-
-ALL_CPPFLAGS += $(CPPFLAGS)
-ALL_CFLAGS += $(CFLAGS)
-
-.PHONY: all
-all: xz.exe
-
-SRCS_C = \
-	../lib/getopt.c \
-	../lib/getopt1.c \
-	../src/common/tuklib_cpucores.c \
-	../src/common/tuklib_exit.c \
-	../src/common/tuklib_mbstr_fw.c \
-	../src/common/tuklib_mbstr_nonprint.c \
-	../src/common/tuklib_mbstr_width.c \
-	../src/common/tuklib_mbstr_wrap.c \
-	../src/common/tuklib_open_stdxxx.c \
-	../src/common/tuklib_physmem.c \
-	../src/common/tuklib_progname.c \
-	../src/liblzma/check/check.c \
-	../src/liblzma/check/crc32_fast.c \
-	../src/liblzma/check/crc64_fast.c \
-	../src/liblzma/check/sha256.c \
-	../src/liblzma/common/alone_decoder.c \
-	../src/liblzma/common/alone_encoder.c \
-	../src/liblzma/common/block_decoder.c \
-	../src/liblzma/common/block_encoder.c \
-	../src/liblzma/common/block_header_decoder.c \
-	../src/liblzma/common/block_header_encoder.c \
-	../src/liblzma/common/block_util.c \
-	../src/liblzma/common/common.c \
-	../src/liblzma/common/file_info.c \
-	../src/liblzma/common/filter_common.c \
-	../src/liblzma/common/filter_decoder.c \
-	../src/liblzma/common/filter_encoder.c \
-	../src/liblzma/common/filter_flags_decoder.c \
-	../src/liblzma/common/filter_flags_encoder.c \
-	../src/liblzma/common/hardware_physmem.c \
-	../src/liblzma/common/index.c \
-	../src/liblzma/common/index_decoder.c \
-	../src/liblzma/common/index_encoder.c \
-	../src/liblzma/common/index_hash.c \
-	../src/liblzma/common/lzip_decoder.c \
-	../src/liblzma/common/stream_decoder.c \
-	../src/liblzma/common/stream_encoder.c \
-	../src/liblzma/common/stream_flags_common.c \
-	../src/liblzma/common/stream_flags_decoder.c \
-	../src/liblzma/common/stream_flags_encoder.c \
-	../src/liblzma/common/string_conversion.c \
-	../src/liblzma/common/vli_decoder.c \
-	../src/liblzma/common/vli_encoder.c \
-	../src/liblzma/common/vli_size.c \
-	../src/liblzma/delta/delta_common.c \
-	../src/liblzma/delta/delta_decoder.c \
-	../src/liblzma/delta/delta_encoder.c \
-	../src/liblzma/lz/lz_decoder.c \
-	../src/liblzma/lz/lz_encoder.c \
-	../src/liblzma/lz/lz_encoder_mf.c \
-	../src/liblzma/lzma/fastpos_table.c \
-	../src/liblzma/lzma/lzma2_decoder.c \
-	../src/liblzma/lzma/lzma2_encoder.c \
-	../src/liblzma/lzma/lzma_decoder.c \
-	../src/liblzma/lzma/lzma_encoder.c \
-	../src/liblzma/lzma/lzma_encoder_optimum_fast.c \
-	../src/liblzma/lzma/lzma_encoder_optimum_normal.c \
-	../src/liblzma/lzma/lzma_encoder_presets.c \
-	../src/liblzma/rangecoder/price_table.c \
-	../src/liblzma/simple/arm.c \
-	../src/liblzma/simple/arm64.c \
-	../src/liblzma/simple/armthumb.c \
-	../src/liblzma/simple/ia64.c \
-	../src/liblzma/simple/powerpc.c \
-	../src/liblzma/simple/simple_coder.c \
-	../src/liblzma/simple/simple_decoder.c \
-	../src/liblzma/simple/simple_encoder.c \
-	../src/liblzma/simple/sparc.c \
-	../src/liblzma/simple/x86.c \
-	../src/xz/args.c \
-	../src/xz/coder.c \
-	../src/xz/file_io.c \
-	../src/xz/hardware.c \
-	../src/xz/list.c \
-	../src/xz/main.c \
-	../src/xz/message.c \
-	../src/xz/mytime.c \
-	../src/xz/options.c \
-	../src/xz/signals.c \
-	../src/xz/suffix.c \
-	../src/xz/util.c
-SRCS_ASM = \
-	../src/liblzma/check/crc32_x86.S \
-	../src/liblzma/check/crc64_x86.S
-
-OBJS_C = $(SRCS_C:.c=.o)
-OBJS_ASM = $(SRCS_ASM:.S=.o)
-OBJS = $(OBJS_C) $(OBJS_ASM)
-
-getopt.h:
-	update ../lib/getopt.in.h getopt.h
-
-$(OBJS): getopt.h
-
-$(OBJS_C): %.o: %.c
-	$(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -c -o $@ $<
-
-$(OBJS_ASM): %.o: %.S
-	$(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -c -o $@ $<
-
-# Make xz.exe not depend on an external DPMI server.
-xz.exe: $(OBJS)
-	$(CC) $(ALL_CFLAGS) $(OBJS) $(LDFLAGS) -o $@
-	$(STRIP) --strip-all $@
-	exe2coff $@
-	del $@
-	copy /b $(DJGPP:DJGPP.ENV=BIN\CWSDSTUB.EXE) + $(@:.exe=) $@
-	del $(@:.exe=)

dos/README.txt

@@ -1,123 +0,0 @@
-
-XZ Utils on DOS
-===============
-
-DOS-specific filename handling
-
-    xz detects at runtime if long filename (LFN) support is
-    available and will use it by default. It can be disabled by
-    setting an environment variable:
-
-        set lfn=n
-
-    When xz is in LFN mode, it behaves pretty much the same as it
-    does on other operating systems. Examples:
-
-        xz foo.tar          -> foo.tar.xz
-        xz -d foo.tar.xz    -> foo.tar
-
-        xz -F lzma foo.tar  -> foo.tar.lzma
-        xz -d foo.tar.lzma  -> foo.tar
-
-    When LFN support isn't available or it is disabled with LFN=n
-    environment setting, xz works in short filename (SFN) mode. This
-    affects filename suffix handling when compressing.
-
-    When compressing to the .xz format in SFN mode:
-
-      - Files without an extension get .xz just like on LFN systems.
-
-      - *.tar files become *.txz (shorthand for *.tar.xz). *.txz
-        is recognized by xz on all supported operating systems.
-        (Try to avoid confusing this with gzipped .txt files.)
-
-      - Files with 1-3 character extension have their extension modified
-        so that the last character is a dash ("-"). If the extension
-        is already three characters, the last character is lost. The
-        resulting *.?- or *.??- filename is recognized in LFN mode, but
-        it isn't recognized by xz on other operating systems.
-
-    Examples:
-
-        xz foo              -> foo.xz     |   xz -d foo.xz    -> foo
-        xz foo.tar          -> foo.txz    |   xz -d foo.txz   -> foo.tar
-        xz foo.c            -> foo.c-     |   xz -d foo.c-    -> foo.c
-        xz read.me          -> read.me-   |   xz -d read.me-  -> read.me
-        xz foo.txt          -> foo.tx-    |   xz -d foo.tx-   -> foo.tx   !
-
-    Note that in the last example above, the third character of the
-    filename extension is lost.
-
-    When compressing to the legacy .lzma format in SFN mode:
-
-      - *.tar files become *.tlz (shorthand for *.tar.lzma). *.tlz
-        is recognized by xz on all supported operating systems.
-
-      - Other files become *.lzm. The original filename extension
-        is lost. *.lzm is recognized also in LFN mode, but it is not
-        recognized by xz on other operating systems.
-
-    Examples:
-
-        xz -F lzma foo      -> foo.lzm    |   xz -d foo.lzm   -> foo
-        xz -F lzma foo.tar  -> foo.tlz    |   xz -d foo.tlz   -> foo.tar
-        xz -F lzma foo.c    -> foo.lzm    |   xz -d foo.lzm   -> foo      !
-        xz -F lzma read.me  -> read.lzm   |   xz -d read.lzm  -> read     !
-        xz -F lzma foo.txt  -> foo.lzm    |   xz -d foo.lzm   -> foo      !
-
-    When compressing with a custom suffix (-S .SUF, --suffix=.SUF) to
-    any file format:
-
-      - If the suffix begins with a dot, the filename extension is
-        replaced with the new suffix. The original extension is lost.
-
-      - If the suffix doesn't begin with a dot and the filename has no
-        extension and the filename given on the command line doesn't
-        have a dot at the end, the custom suffix is appended just like
-        on LFN systems.
-
-      - If the suffix doesn't begin with a dot and the filename has
-        an extension (or an extension-less filename is given with a dot
-        at the end), the last 1-3 characters of the filename extension
-        may get overwritten to fit the given custom suffix.
-
-    Examples:
-
-        xz -S x foo        -> foox      |  xz -dS x foox      -> foo
-        xz -S x foo.       -> foo.x     |  xz -dS x foo.x     -> foo
-        xz -S .x foo       -> foo.x     |  xz -dS .x foo.x    -> foo
-        xz -S .x foo.      -> foo.x     |  xz -dS .x foo.x    -> foo
-        xz -S x.y foo      -> foox.y    |  xz -dS x.y foox.y  -> foo
-        xz -S .a foo.c     -> foo.a     |  xz -dS .a foo.a    -> foo      !
-        xz -S a  foo.c     -> foo.ca    |  xz -dS a foo.ca    -> foo.c
-        xz -S ab foo.c     -> foo.cab   |  xz -dS ab foo.cab  -> foo.c
-        xz -S ab read.me   -> read.mab  |  xz -dS ab read.mab -> read.m   !
-        xz -S ab foo.txt   -> foo.tab   |  xz -dS ab foo.tab  -> foo.t    !
-        xz -S abc foo.txt  -> foo.abc   |  xz -dS abc foo.abc -> foo      !
-
-    When decompressing, the suffix handling in SFN mode is the same as
-    in LFN mode. The DOS-specific filenames *.lzm, *.?-, and *.??- are
-    recognized also in LFN mode.
-
-    xz handles certain uncommon situations safely:
-
-      - If the generated output filename refers to the same file as
-        the input file, xz detects this and refuses to compress or
-        decompress the input file even if --force is used. This can
-        happen when giving an overlong filename in SFN mode. E.g.
-        "xz -S x foo.texinfo" would try to write to foo.tex which on
-        SFN system is the same file as foo.texinfo.
-
-      - If the generated output filename is a special file like "con"
-        or "prn", xz detects this and refuses to compress or decompress
-        the input file even if --force is used.
-
-
-Bugs
-
-    xz doesn't necessarily work in Dosbox. It should work in DOSEMU.
-
-    Pressing Ctrl-c or Ctrl-Break won't remove the incomplete target file
-    when running under Windows XP Command Prompt (something goes wrong
-    with SIGINT handling). It works correctly under Windows 95/98/98SE/ME.
-

dos/config.h

@@ -1,146 +0,0 @@
-/* SPDX-License-Identifier: 0BSD */
-
-/* How many MiB of RAM to assume if the real amount cannot be determined. */
-#define ASSUME_RAM 32
-
-/* Define to 1 if crc32 integrity check is enabled. */
-#define HAVE_CHECK_CRC32 1
-
-/* Define to 1 if crc64 integrity check is enabled. */
-#define HAVE_CHECK_CRC64 1
-
-/* Define to 1 if sha256 integrity check is enabled. */
-#define HAVE_CHECK_SHA256 1
-
-/* Define to 1 if the 32-bit x86 CRC assembly files are used. */
-#define HAVE_CRC_X86_ASM 1
-
-/* Define to 1 if any of HAVE_DECODER_foo have been defined. */
-#define HAVE_DECODERS 1
-
-/* Define to 1 if arm decoder is enabled. */
-#define HAVE_DECODER_ARM 1
-
-/* Define to 1 if arm64 decoder is enabled. */
-#define HAVE_DECODER_ARM64 1
-
-/* Define to 1 if armthumb decoder is enabled. */
-#define HAVE_DECODER_ARMTHUMB 1
-
-/* Define to 1 if delta decoder is enabled. */
-#define HAVE_DECODER_DELTA 1
-
-/* Define to 1 if ia64 decoder is enabled. */
-#define HAVE_DECODER_IA64 1
-
-/* Define to 1 if lzma1 decoder is enabled. */
-#define HAVE_DECODER_LZMA1 1
-
-/* Define to 1 if lzma2 decoder is enabled. */
-#define HAVE_DECODER_LZMA2 1
-
-/* Define to 1 if powerpc decoder is enabled. */
-#define HAVE_DECODER_POWERPC 1
-
-/* Define to 1 if sparc decoder is enabled. */
-#define HAVE_DECODER_SPARC 1
-
-/* Define to 1 if x86 decoder is enabled. */
-#define HAVE_DECODER_X86 1
-
-/* Define to 1 if any of HAVE_ENCODER_foo have been defined. */
-#define HAVE_ENCODERS 1
-
-/* Define to 1 if arm encoder is enabled. */
-#define HAVE_ENCODER_ARM 1
-
-/* Define to 1 if arm64 encoder is enabled. */
-#define HAVE_ENCODER_ARM64 1
-
-/* Define to 1 if armthumb encoder is enabled. */
-#define HAVE_ENCODER_ARMTHUMB 1
-
-/* Define to 1 if delta encoder is enabled. */
-#define HAVE_ENCODER_DELTA 1
-
-/* Define to 1 if ia64 encoder is enabled. */
-#define HAVE_ENCODER_IA64 1
-
-/* Define to 1 if lzma1 encoder is enabled. */
-#define HAVE_ENCODER_LZMA1 1
-
-/* Define to 1 if lzma2 encoder is enabled. */
-#define HAVE_ENCODER_LZMA2 1
-
-/* Define to 1 if powerpc encoder is enabled. */
-#define HAVE_ENCODER_POWERPC 1
-
-/* Define to 1 if sparc encoder is enabled. */
-#define HAVE_ENCODER_SPARC 1
-
-/* Define to 1 if x86 encoder is enabled. */
-#define HAVE_ENCODER_X86 1
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#define HAVE_INTTYPES_H 1
-
-/* Define to 1 if .lz (lzip) decompression support is enabled. */
-#define HAVE_LZIP_DECODER 1
-
-/* Define to 1 to enable bt2 match finder. */
-#define HAVE_MF_BT2 1
-
-/* Define to 1 to enable bt3 match finder. */
-#define HAVE_MF_BT3 1
-
-/* Define to 1 to enable bt4 match finder. */
-#define HAVE_MF_BT4 1
-
-/* Define to 1 to enable hc3 match finder. */
-#define HAVE_MF_HC3 1
-
-/* Define to 1 to enable hc4 match finder. */
-#define HAVE_MF_HC4 1
-
-/* Define to 1 if stdbool.h conforms to C99. */
-#define HAVE_STDBOOL_H 1
-
-/* Define to 1 if you have the <stdint.h> header file. */
-#define HAVE_STDINT_H 1
-
-/* Define to 1 if you have the 'utimes' function. */
-#define HAVE_UTIMES 1
-
-/* Define to 1 or 0, depending whether the compiler supports simple visibility
-   declarations. */
-#define HAVE_VISIBILITY 0
-
-/* Define to 1 if the system has the type '_Bool'. */
-#define HAVE__BOOL 1
-
-/* Define to 1 if the GNU C extension __builtin_assume_aligned is supported.
-   */
-#define HAVE___BUILTIN_ASSUME_ALIGNED 1
-
-/* Define to 1 if the GNU C extensions __builtin_bswap16/32/64 are supported.
-   */
-#define HAVE___BUILTIN_BSWAPXX 1
-
-/* Define to 1 to disable debugging code. */
-#define NDEBUG 1
-
-/* Define to the address where bug reports for this package should be sent. */
-#define PACKAGE_BUGREPORT "xz@tukaani.org"
-
-/* Define to the full name of this package. */
-#define PACKAGE_NAME "XZ Utils"
-
-/* Define to the home page for this package. */
-#define PACKAGE_URL "https://tukaani.org/xz/"
-
-/* The size of 'size_t', as computed by sizeof. */
-#define SIZEOF_SIZE_T 4
-
-/* Define to 1 if the system supports fast unaligned access to 16-bit and
-   32-bit integers. */
-#define TUKLIB_FAST_UNALIGNED_ACCESS 1

doxygen/Doxyfile

@@ -1,45 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-# Run "doxygen" in this directory to generate the liblzma API documentation
-# into ../doc/api.
-#
-# Use the "update-doxygen" script for more choices:
-#   - Include the liblzma version number in the generated documentation.
-#   - Instead of API docs, docs of XZ Utils internals may be built.
-#   - Change the output directory for out-of-tree builds.
-#
-# These options were tested with Doxygen 1.9.8 and 1.13.2.
-
-PROJECT_NAME           = "liblzma (XZ Utils)"
-OUTPUT_DIRECTORY       = ../doc
-STRIP_FROM_PATH        = ../src/liblzma/api
-INPUT                  = ../src/liblzma/api
-FILE_PATTERNS          = *.c *.h
-RECURSIVE              = YES
-OPTIMIZE_OUTPUT_FOR_C  = YES
-EXTRACT_STATIC         = YES
-SORT_MEMBER_DOCS       = NO
-WARN_IF_UNDOCUMENTED   = NO
-WARN_AS_ERROR          = FAIL_ON_WARNINGS
-SOURCE_TOOLTIPS        = NO
-VERBATIM_HEADERS       = NO
-ALPHABETICAL_INDEX     = NO
-HTML_OUTPUT            = api
-HTML_COLORSTYLE_HUE    = 210
-HTML_COLORSTYLE_SAT    = 180
-HTML_COLORSTYLE_GAMMA  = 110
-HTML_DYNAMIC_MENUS     = NO
-SEARCHENGINE           = NO
-GENERATE_LATEX         = NO
-MACRO_EXPANSION        = YES
-EXPAND_ONLY_PREDEF     = YES
-PREDEFINED             = LZMA_API(type)=type \
-                         LZMA_API_IMPORT= \
-                         LZMA_API_CALL= \
-                         tuklib_attr_noreturn= \
-                         lzma_attribute(attr)= \
-                         lzma_attr_alloc_size(size)=
-
-# Debian and Ubuntu patch Doxygen so that HAVE_DOT = YES is the default.
-# Set HAVE_DOT explicitly to get consistent behavior across distributions.
-HAVE_DOT               = NO

doxygen/update-doxygen

@@ -1,114 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# While it's possible to use the Doxyfile as is to generate liblzma API
-# documentation, it is recommended to use this script because this adds
-# the XZ Utils version number to the generated HTML.
-#
-# Other features:
-#  - Generate documentation of the XZ Utils internals.
-#  - Set input and output paths for out-of-tree builds.
-#
-#############################################################################
-#
-# Authors: Jia Tan
-#          Lasse Collin
-#
-#############################################################################
-
-set -e
-
-show_usage()
-{
-	echo "Usage: $0 <api|internal> [ABS_TOP_SRCDIR ABS_OUTDIR]"
-	echo
-	echo "Supported modes:"
-	echo " - 'api' (default): liblzma API docs into doc/api"
-	echo " - 'internal': internal docs into doc/internal"
-	echo
-	echo "Absolute source and output dirs may be set" \
-		"to do an out-of-tree build."
-	echo "The output directory must already exist."
-	exit 1
-}
-
-case $1 in
-	api|internal)
-		;;
-	*)
-		show_usage
-		;;
-esac
-
-if type doxygen > /dev/null 2>&1; then
-	:
-else
-	echo "$0: 'doxygen' command not found" >&2
-	exit 1
-fi
-
-case $# in
-	1)
-		# One argument: Building inside the source tree
-		ABS_TOP_SRCDIR=`dirname "$0"`/..
-		ABS_OUTDIR=$ABS_TOP_SRCDIR/doc
-		;;
-	3)
-		# Three arguments: Possibly an out of tree build
-		ABS_TOP_SRCDIR=$2
-		ABS_OUTDIR=$3
-		;;
-	*)
-		show_usage
-		;;
-esac
-
-if test ! -f "$ABS_TOP_SRCDIR/doxygen/Doxyfile"; then
-	echo "$0: Source dir '$ABS_TOP_SRCDIR/doxygen/Doxyfile' not found" >&2
-	exit 1
-fi
-if test ! -d "$ABS_OUTDIR"; then
-	echo "$0: Output dir '$ABS_OUTDIR' not found" >&2
-	exit 1
-fi
-
-# Get the package version so that it can be included in the generated docs.
-PACKAGE_VERSION=`cd "$ABS_TOP_SRCDIR" && sh build-aux/version.sh`
-
-case $1 in
-	api)
-		# Remove old documentation before re-generating the new.
-		rm -rf "$ABS_OUTDIR/api"
-
-		# Generate the HTML documentation by preparing the Doxyfile
-		# in stdin and piping the result to the doxygen command.
-		# With Doxygen, the last assignment of a value to a tag will
-		# override any earlier assignment. So, we can use this
-		# feature to override the tags that need to change between
-		# "api" and "internal" modes.
-		ABS_SRCDIR=$ABS_TOP_SRCDIR/src/liblzma/api
-		(
-			cat "$ABS_TOP_SRCDIR/doxygen/Doxyfile"
-			echo "PROJECT_NUMBER         = $PACKAGE_VERSION"
-			echo "OUTPUT_DIRECTORY       = $ABS_OUTDIR"
-			echo "STRIP_FROM_PATH        = $ABS_SRCDIR"
-			echo "INPUT                  = $ABS_SRCDIR"
-		) | doxygen -q -
-		;;
-
-	internal)
-		rm -rf "$ABS_OUTDIR/internal"
-		(
-			cat "$ABS_TOP_SRCDIR/doxygen/Doxyfile"
-			echo 'PROJECT_NAME           = "XZ Utils"'
-			echo "PROJECT_NUMBER         = $PACKAGE_VERSION"
-			echo "OUTPUT_DIRECTORY       = $ABS_OUTDIR"
-			echo "STRIP_FROM_PATH        = $ABS_TOP_SRCDIR"
-			echo "INPUT                  = $ABS_TOP_SRCDIR/src"
-			echo 'HTML_OUTPUT            = internal'
-			echo 'SEARCHENGINE           = YES'
-		) | doxygen -q -
-		;;
-esac

extra/7z2lzma/7z2lzma.bash

@@ -1,113 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# 7z2lzma.bash is very primitive .7z to .lzma converter. The input file must
-# have exactly one LZMA compressed stream, which has been created with the
-# default lc, lp, and pb values. The CRC32 in the .7z archive is not checked,
-# and the script may seem to succeed while it actually created a corrupt .lzma
-# file. You should always try uncompressing both the original .7z and the
-# created .lzma and compare that the output is identical.
-#
-# This script requires basic GNU tools and 7z or 7za tool from p7zip.
-#
-# Last modified: 2009-01-15 14:25+0200
-#
-#############################################################################
-#
-# Author: Lasse Collin <lasse.collin@tukaani.org>
-#
-#############################################################################
-
-# You can use 7z or 7za, both will work.
-SEVENZIP=7za
-
-if [ $# != 2 -o -z "$1" -o -z "$2" ]; then
-	echo "Usage: $0 input.7z output.lzma"
-	exit 1
-fi
-
-# Converts an integer variable to little endian binary integer.
-int2bin()
-{
-	local LEN=$1
-	local NUM=$2
-	local HEX=(0 1 2 3 4 5 6 7 8 9 A B C D E F)
-	local I
-	for ((I=0; I < "$LEN"; ++I)); do
-		printf "\\x${HEX[(NUM >> 4) & 0x0F]}${HEX[NUM & 0x0F]}"
-		NUM=$((NUM >> 8))
-	done
-}
-
-# Make sure we get possible errors from pipes.
-set -o pipefail
-
-# Get information about the input file. At least older 7z and 7za versions
-# may return with zero exit status even when an error occurred, so check
-# if the output has any lines beginning with "Error".
-INFO=$("$SEVENZIP" l -slt "$1")
-if [ $? != 0 ] || printf '%s\n' "$INFO" | grep -q ^Error; then
-	printf '%s\n' "$INFO"
-	exit 1
-fi
-
-# Check if the input file has more than one compressed block.
-if printf '%s\n' "$INFO" | grep -q '^Block = 1'; then
-	echo "Cannot convert, because the input file has more than"
-	echo "one compressed block."
-	exit 1
-fi
-
-# Get compressed, uncompressed, and dictionary size.
-CSIZE=$(printf '%s\n' "$INFO" | sed -rn 's|^Packed Size = ([0-9]+$)|\1|p')
-USIZE=$(printf '%s\n' "$INFO" | sed -rn 's|^Size = ([0-9]+$)|\1|p')
-DICT=$(printf '%s\n' "$INFO" | sed -rn 's|^Method = LZMA:([0-9]+[bkm]?)$|\1|p')
-
-if [ -z "$CSIZE" -o -z "$USIZE" -o -z "$DICT" ]; then
-	echo "Parsing output of $SEVENZIP failed. Maybe the file uses some"
-	echo "other compression method than plain LZMA."
-	exit 1
-fi
-
-# The following assumes that the default lc, lp, and pb settings were used.
-# Otherwise the output will be corrupt.
-printf '\x5D' > "$2"
-
-# Dictionary size can be either was power of two, bytes, kibibytes, or
-# mebibytes. We need to convert it to bytes.
-case $DICT in
-	*b)
-		DICT=${DICT%b}
-		;;
-	*k)
-		DICT=${DICT%k}
-		DICT=$((DICT << 10))
-		;;
-	*m)
-		DICT=${DICT%m}
-		DICT=$((DICT << 20))
-		;;
-	*)
-		DICT=$((1 << DICT))
-		;;
-esac
-int2bin 4 "$DICT" >> "$2"
-
-# Uncompressed size
-int2bin 8 "$USIZE" >> "$2"
-
-# Copy the actual compressed data. Using multiple dd commands to avoid
-# copying large amount of data with one-byte block size, which would be
-# annoyingly slow.
-BS=8192
-BIGSIZE=$((CSIZE / BS))
-CSIZE=$((CSIZE % BS))
-{
-	dd of=/dev/null bs=32 count=1 \
-		&& dd bs="$BS" count="$BIGSIZE" \
-		&& dd bs=1 count="$CSIZE"
-} < "$1" >> "$2"
-
-exit $?

extra/scanlzma/scanlzma.c

@@ -1,5 +1,3 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-
 /*
     scanlzma, scan for lzma compressed data in stdin and echo it to stdout.
     Copyright (C) 2006 Timo Lindfors
@@ -39,10 +37,6 @@
 /*   5     8   Uncompressed size (little endian). -1 means unknown size */
 /*  13         Compressed data */
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
 #define BUFSIZE 4096
 
 int find_lzma_header(unsigned char *buf) {
@@ -54,7 +48,7 @@ int find_lzma_header(unsigned char *buf) {
 }
 
 int main(int argc, char *argv[]) {
-	unsigned char buf[BUFSIZE];
+	char buf[BUFSIZE];
 	int ret, i, numlzma, blocks=0;
 
 	if (argc != 2) {
@@ -82,6 +76,7 @@ int main(int argc, char *argv[]) {
 						exit(0);
 					putchar(ch);
 				}
+					
 			}
 		}
 		blocks++;

lib/Makefile.am

@@ -1,7 +1,6 @@
-## SPDX-License-Identifier: GPL-2.0-or-later
-
 ##
 ##  Copyright (C) 2004-2007 Free Software Foundation, Inc.
+##  Copyright (C) 2007 Lasse Collin
 ##
 ##  This program is free software; you can redistribute it and/or modify
 ##  it under the terms of the GNU General Public License as published by
@@ -14,8 +13,7 @@
 ##  GNU General Public License for more details.
 ##
 
-## Not using gnulib-tool, at least for now. It is likely that we won't
+## Not using gnulib-tool, at least for now. Less mess this way.
-## need anything else from Gnulib than getopt_long().
 
 noinst_LIBRARIES = libgnu.a
 
@@ -23,22 +21,12 @@ libgnu_a_SOURCES =
 libgnu_a_DEPENDENCIES = $(LIBOBJS)
 libgnu_a_LIBADD = $(LIBOBJS)
 
-EXTRA_DIST = \
+EXTRA_DIST = gettext.h getopt_.h getopt.c getopt1.c getopt_int.h
-	getopt.in.h \
-	getopt.c \
-	getopt1.c \
-	getopt_int.h \
-	getopt-cdefs.h \
-	getopt-core.h \
-	getopt-ext.h \
-	getopt-pfx-core.h \
-	getopt-pfx-ext.h
-
 BUILT_SOURCES = $(GETOPT_H)
 MOSTLYCLEANFILES = getopt.h getopt.h-t
 
-getopt.h: getopt.in.h
+getopt.h: getopt_.h
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-	  cat $(srcdir)/getopt.in.h; \
+	  cat $(srcdir)/getopt_.h; \
 	} > $@-t
 	mv -f $@-t $@

lib/getopt-cdefs.h

@@ -1,72 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* getopt-on-non-glibc compatibility macros.
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of gnulib.
-   Unlike most of the getopt implementation, it is NOT shared
-   with the GNU C Library.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_CDEFS_H
-#define _GETOPT_CDEFS_H 1
-
-/* This header should not be used directly; include getopt.h or
-   unistd.h instead.  It does not have a protective #error, because
-   the guard macro for getopt.h in gnulib is not fixed.  */
-
-/* getopt-core.h and getopt-ext.h are shared with GNU libc, and expect
-   a number of the internal macros supplied to GNU libc's headers by
-   sys/cdefs.h.  Provide fallback definitions for all of them.  */
-#ifdef HAVE_SYS_CDEFS_H
-# include <sys/cdefs.h>
-#endif
-
-#ifndef __BEGIN_DECLS
-# ifdef __cplusplus
-#  define __BEGIN_DECLS extern "C" {
-# else
-#  define __BEGIN_DECLS /* nothing */
-# endif
-#endif
-#ifndef __END_DECLS
-# ifdef __cplusplus
-#  define __END_DECLS }
-# else
-#  define __END_DECLS /* nothing */
-# endif
-#endif
-
-#ifndef __GNUC_PREREQ
-# if defined __GNUC__ && defined __GNUC_VERSION__
-# define __GNUC_PREREQ(maj, min) \
-        ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
-# else
-#  define __GNUC_PREREQ(maj, min) 0
-# endif
-#endif
-
-#ifndef __THROW
-# if defined __cplusplus && (__GNUC_PREREQ (2,8) || __clang_major__ >= 4)
-#  if __cplusplus >= 201103L
-#   define __THROW      noexcept (true)
-#  else
-#   define __THROW      throw ()
-#  endif
-# else
-#  define __THROW
-# endif
-#endif
-
-#endif /* _GETOPT_CDEFS_H */

lib/getopt-core.h

@@ -1,98 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* Declarations for getopt (basic, portable features only).
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of the GNU C Library and is also part of gnulib.
-   Patches to this file should be submitted to both projects.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_CORE_H
-#define _GETOPT_CORE_H 1
-
-/* This header should not be used directly; include getopt.h or
-   unistd.h instead.  Unlike most bits headers, it does not have
-   a protective #error, because the guard macro for getopt.h in
-   gnulib is not fixed.  */
-
-__BEGIN_DECLS
-
-/* For communication from 'getopt' to the caller.
-   When 'getopt' finds an option that takes an argument,
-   the argument value is returned here.
-   Also, when 'ordering' is RETURN_IN_ORDER,
-   each non-option ARGV-element is returned here.  */
-
-extern char *optarg;
-
-/* Index in ARGV of the next element to be scanned.
-   This is used for communication to and from the caller
-   and for communication between successive calls to 'getopt'.
-
-   On entry to 'getopt', zero means this is the first call; initialize.
-
-   When 'getopt' returns -1, this is the index of the first of the
-   non-option elements that the caller should itself scan.
-
-   Otherwise, 'optind' communicates from one call to the next
-   how much of ARGV has been scanned so far.  */
-
-extern int optind;
-
-/* Callers store zero here to inhibit the error message 'getopt' prints
-   for unrecognized options.  */
-
-extern int opterr;
-
-/* Set to an option character which was unrecognized.  */
-
-extern int optopt;
-
-/* Get definitions and prototypes for functions to process the
-   arguments in ARGV (ARGC of them, minus the program name) for
-   options given in OPTS.
-
-   Return the option character from OPTS just read.  Return -1 when
-   there are no more options.  For unrecognized options, or options
-   missing arguments, 'optopt' is set to the option letter, and '?' is
-   returned.
-
-   The OPTS string is a list of characters which are recognized option
-   letters, optionally followed by colons, specifying that that letter
-   takes an argument, to be placed in 'optarg'.
-
-   If a letter in OPTS is followed by two colons, its argument is
-   optional.  This behavior is specific to the GNU 'getopt'.
-
-   The argument '--' causes premature termination of argument
-   scanning, explicitly telling 'getopt' that there are no more
-   options.
-
-   If OPTS begins with '-', then non-option arguments are treated as
-   arguments to the option '\1'.  This behavior is specific to the GNU
-   'getopt'.  If OPTS begins with '+', or POSIXLY_CORRECT is set in
-   the environment, then do not permute arguments.
-
-   For standards compliance, the 'argv' argument has the type
-   char *const *, but this is inaccurate; if argument permutation is
-   enabled, the argv array (not the strings it points to) must be
-   writable.  */
-
-extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
-       __THROW _GL_ARG_NONNULL ((2, 3));
-
-__END_DECLS
-
-#endif /* _GETOPT_CORE_H */

lib/getopt-ext.h

@@ -1,79 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* Declarations for getopt (GNU extensions).
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of the GNU C Library and is also part of gnulib.
-   Patches to this file should be submitted to both projects.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_EXT_H
-#define _GETOPT_EXT_H 1
-
-/* This header should not be used directly; include getopt.h instead.
-   Unlike most bits headers, it does not have a protective #error,
-   because the guard macro for getopt.h in gnulib is not fixed.  */
-
-__BEGIN_DECLS
-
-/* Describe the long-named options requested by the application.
-   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
-   of 'struct option' terminated by an element containing a name which is
-   zero.
-
-   The field 'has_arg' is:
-   no_argument		(or 0) if the option does not take an argument,
-   required_argument	(or 1) if the option requires an argument,
-   optional_argument 	(or 2) if the option takes an optional argument.
-
-   If the field 'flag' is not NULL, it points to a variable that is set
-   to the value given in the field 'val' when the option is found, but
-   left unchanged if the option is not found.
-
-   To have a long-named option do something other than set an 'int' to
-   a compiled-in constant, such as set a value from 'optarg', set the
-   option's 'flag' field to zero and its 'val' field to a nonzero
-   value (the equivalent single-letter option character, if there is
-   one).  For long options that have a zero 'flag' field, 'getopt'
-   returns the contents of the 'val' field.  */
-
-struct option
-{
-  const char *name;
-  /* has_arg can't be an enum because some compilers complain about
-     type mismatches in all the code that assumes it is an int.  */
-  int has_arg;
-  int *flag;
-  int val;
-};
-
-/* Names for the values of the 'has_arg' field of 'struct option'.  */
-
-#define no_argument		0
-#define required_argument	1
-#define optional_argument	2
-
-extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
-			const char *__shortopts,
-		        const struct option *__longopts, int *__longind)
-       __THROW _GL_ARG_NONNULL ((2, 3));
-extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
-			     const char *__shortopts,
-		             const struct option *__longopts, int *__longind)
-       __THROW _GL_ARG_NONNULL ((2, 3));
-
-__END_DECLS
-
-#endif /* _GETOPT_EXT_H */

lib/getopt-pfx-core.h

@@ -1,68 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* getopt (basic, portable features) gnulib wrapper header.
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of gnulib.
-   Unlike most of the getopt implementation, it is NOT shared
-   with the GNU C Library.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_PFX_CORE_H
-#define _GETOPT_PFX_CORE_H 1
-
-/* This header should not be used directly; include getopt.h or
-   unistd.h instead.  It does not have a protective #error, because
-   the guard macro for getopt.h in gnulib is not fixed.  */
-
-/* Standalone applications should #define __GETOPT_PREFIX to an
-   identifier that prefixes the external functions and variables
-   defined in getopt-core.h and getopt-ext.h.  Systematically
-   rename identifiers so that they do not collide with the system
-   functions and variables.  Renaming avoids problems with some
-   compilers and linkers.  */
-#ifdef __GETOPT_PREFIX
-# ifndef __GETOPT_ID
-#  define __GETOPT_CONCAT(x, y) x ## y
-#  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
-#  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
-# endif
-# undef getopt
-# undef optarg
-# undef opterr
-# undef optind
-# undef optopt
-# define getopt __GETOPT_ID (getopt)
-# define optarg __GETOPT_ID (optarg)
-# define opterr __GETOPT_ID (opterr)
-# define optind __GETOPT_ID (optind)
-# define optopt __GETOPT_ID (optopt)
-
-/* Work around a problem on macOS, which declares getopt with a
-   trailing __DARWIN_ALIAS(getopt) that would expand to something like
-   __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
-   hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
-# ifdef __APPLE__
-#  define _GETOPT
-# endif
-
-/* The system's getopt.h may have already included getopt-core.h to
-   declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
-   getopt-core.h declares them with prefixes.  */
-# undef _GETOPT_CORE_H
-#endif
-
-#include <getopt-core.h>
-
-#endif /* _GETOPT_PFX_CORE_H */

lib/getopt-pfx-ext.h

@@ -1,72 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* getopt (GNU extensions) gnulib wrapper header.
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of gnulib.
-   Unlike most of the getopt implementation, it is NOT shared
-   with the GNU C Library.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_PFX_EXT_H
-#define _GETOPT_PFX_EXT_H 1
-
-/* This header should not be used directly; include getopt.h instead.
-   It does not have a protective #error, because the guard macro for
-   getopt.h in gnulib is not fixed.  */
-
-/* Standalone applications should #define __GETOPT_PREFIX to an
-   identifier that prefixes the external functions and variables
-   defined in getopt-core.h and getopt-ext.h.  Systematically
-   rename identifiers so that they do not collide with the system
-   functions and variables.  Renaming avoids problems with some
-   compilers and linkers.  */
-#ifdef __GETOPT_PREFIX
-# ifndef __GETOPT_ID
-#  define __GETOPT_CONCAT(x, y) x ## y
-#  define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
-#  define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
-# endif
-# undef getopt_long
-# undef getopt_long_only
-# undef option
-# undef _getopt_internal
-# define getopt_long __GETOPT_ID (getopt_long)
-# define getopt_long_only __GETOPT_ID (getopt_long_only)
-# define option __GETOPT_ID (option)
-# define _getopt_internal __GETOPT_ID (getopt_internal)
-
-/* The system's getopt.h may have already included getopt-ext.h to
-   declare the unprefixed identifiers.  Undef _GETOPT_EXT_H so that
-   getopt-ext.h declares them with prefixes.  */
-# undef _GETOPT_EXT_H
-#endif
-
-/* Standalone applications get correct prototypes for getopt_long and
-   getopt_long_only; they declare "char **argv".  For backward
-   compatibility with old applications, if __GETOPT_PREFIX is not
-   defined, we supply GNU-libc-compatible, but incorrect, prototypes
-   using "char *const *argv".  (GNU libc is stuck with the incorrect
-   prototypes, as they are baked into older versions of LSB.)  */
-#ifndef __getopt_argv_const
-# if defined __GETOPT_PREFIX
-#  define __getopt_argv_const /* empty */
-# else
-#  define __getopt_argv_const const
-# endif
-#endif
-
-#include <getopt-ext.h>
-
-#endif /* _GETOPT_PFX_EXT_H */

lib/getopt.in.h

@@ -1,60 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
-/* Declarations for getopt.
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
-   This file is part of gnulib.
-   Unlike most of the getopt implementation, it is NOT shared
-   with the GNU C Library, which supplies a different version of
-   this file.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GETOPT_H
-
-#define _GETOPT_H 1
-
-/* Standalone applications should #define __GETOPT_PREFIX to an
-   identifier that prefixes the external functions and variables
-   defined in this header.  When this happens, include the
-   headers that might declare getopt so that they will not cause
-   confusion if included after this file.  Then systematically rename
-   identifiers so that they do not collide with the system functions
-   and variables.  Renaming avoids problems with some compilers and
-   linkers.  */
-#if defined __GETOPT_PREFIX
-# include <stdlib.h>
-# include <stdio.h>
-
-# ifndef _MSC_VER
-#  include <unistd.h>
-# endif
-#endif
-
-/* From Gnulib's lib/arg-nonnull.h: */
-/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
-   that the values passed as arguments n, ..., m must be non-NULL pointers.
-   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
-#ifndef _GL_ARG_NONNULL
-# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
-#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
-# else
-#  define _GL_ARG_NONNULL(params)
-# endif
-#endif
-
-#include <getopt-cdefs.h>
-#include <getopt-pfx-core.h>
-#include <getopt-pfx-ext.h>
-
-#endif /* _GETOPT_H */

lib/getopt1.c

@@ -1,32 +1,41 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
 /* getopt_long and getopt_long_only entry points for GNU getopt.
-   Copyright (C) 1987-2023 Free Software Foundation, Inc.
+   Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98,2004,2006
-   This file is part of the GNU C Library and is also part of gnulib.
+     Free Software Foundation, Inc.
-   Patches to this file should be submitted to both projects.
+   This file is part of the GNU C Library.
 
-   The GNU C Library is free software; you can redistribute it and/or
+   This program is free software; you can redistribute it and/or modify
-   modify it under the terms of the GNU Lesser General Public
+   it under the terms of the GNU General Public License as published by
-   License as published by the Free Software Foundation; either
+   the Free Software Foundation; either version 2, or (at your option)
-   version 2.1 of the License, or (at your option) any later version.
+   any later version.
 
-   The GNU C Library is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   Lesser General Public License for more details.
+   GNU General Public License for more details.
 
-   You should have received a copy of the GNU Lesser General Public
+   You should have received a copy of the GNU General Public License along
-   License along with the GNU C Library; if not, see
+   with this program; if not, write to the Free Software Foundation,
-   <https://www.gnu.org/licenses/>.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
-#ifndef _LIBC
+#ifdef _LIBC
-# ifdef HAVE_CONFIG_H
+# include <getopt.h>
+#else
 # include <config.h>
+# include "getopt.h"
 #endif
+#include "getopt_int.h"
+
+#include <stdio.h>
+
+/* This needs to come after some library #include
+   to get __GNU_LIBRARY__ defined.  */
+#ifdef __GNU_LIBRARY__
+#include <stdlib.h>
 #endif
 
-#include "getopt.h"
+#ifndef	NULL
-#include "getopt_int.h"
+#define NULL 0
+#endif
 
 int
 getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
@@ -42,7 +51,7 @@ _getopt_long_r (int argc, char **argv, const char *options,
 		struct _getopt_data *d)
 {
   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
-			     0, d, 0);
+			     0, 0, d);
 }
 
 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
@@ -65,14 +74,13 @@ _getopt_long_only_r (int argc, char **argv, const char *options,
 		     struct _getopt_data *d)
 {
   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
-			     1, d, 0);
+			     1, 0, d);
 }
 
 
 #ifdef TEST
 
 #include <stdio.h>
-#include <stdlib.h>
 
 int
 main (int argc, char **argv)
@@ -84,7 +92,7 @@ main (int argc, char **argv)
     {
       int this_option_optind = optind ? optind : 1;
       int option_index = 0;
-      static const struct option long_options[] =
+      static struct option long_options[] =
       {
 	{"add", 1, 0, 0},
 	{"append", 0, 0, 0},
@@ -134,11 +142,11 @@ main (int argc, char **argv)
 	  break;
 
 	case 'c':
-	  printf ("option c with value '%s'\n", optarg);
+	  printf ("option c with value `%s'\n", optarg);
 	  break;
 
 	case 'd':
-	  printf ("option d with value '%s'\n", optarg);
+	  printf ("option d with value `%s'\n", optarg);
 	  break;
 
 	case '?':

lib/getopt_.h

@@ -0,0 +1,226 @@
+/* Declarations for getopt.
+   Copyright (C) 1989-1994,1996-1999,2001,2003,2004,2005,2006,2007
+   Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _GETOPT_H
+
+#ifndef __need_getopt
+# define _GETOPT_H 1
+#endif
+
+/* Standalone applications should #define __GETOPT_PREFIX to an
+   identifier that prefixes the external functions and variables
+   defined in this header.  When this happens, include the
+   headers that might declare getopt so that they will not cause
+   confusion if included after this file.  Then systematically rename
+   identifiers so that they do not collide with the system functions
+   and variables.  Renaming avoids problems with some compilers and
+   linkers.  */
+#if defined __GETOPT_PREFIX && !defined __need_getopt
+# include <stdlib.h>
+# include <stdio.h>
+# include <unistd.h>
+# undef __need_getopt
+# undef getopt
+# undef getopt_long
+# undef getopt_long_only
+# undef optarg
+# undef opterr
+# undef optind
+# undef optopt
+# define __GETOPT_CONCAT(x, y) x ## y
+# define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
+# define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
+# define getopt __GETOPT_ID (getopt)
+# define getopt_long __GETOPT_ID (getopt_long)
+# define getopt_long_only __GETOPT_ID (getopt_long_only)
+# define optarg __GETOPT_ID (optarg)
+# define opterr __GETOPT_ID (opterr)
+# define optind __GETOPT_ID (optind)
+# define optopt __GETOPT_ID (optopt)
+#endif
+
+/* Standalone applications get correct prototypes for getopt_long and
+   getopt_long_only; they declare "char **argv".  libc uses prototypes
+   with "char *const *argv" that are incorrect because getopt_long and
+   getopt_long_only can permute argv; this is required for backward
+   compatibility (e.g., for LSB 2.0.1).
+
+   This used to be `#if defined __GETOPT_PREFIX && !defined __need_getopt',
+   but it caused redefinition warnings if both unistd.h and getopt.h were
+   included, since unistd.h includes getopt.h having previously defined
+   __need_getopt.
+
+   The only place where __getopt_argv_const is used is in definitions
+   of getopt_long and getopt_long_only below, but these are visible
+   only if __need_getopt is not defined, so it is quite safe to rewrite
+   the conditional as follows:
+*/
+#if !defined __need_getopt
+# if defined __GETOPT_PREFIX
+#  define __getopt_argv_const /* empty */
+# else
+#  define __getopt_argv_const const
+# endif
+#endif
+
+/* If __GNU_LIBRARY__ is not already defined, either we are being used
+   standalone, or this is the first header included in the source file.
+   If we are being used with glibc, we need to include <features.h>, but
+   that does not exist if we are standalone.  So: if __GNU_LIBRARY__ is
+   not defined, include <ctype.h>, which will pull in <features.h> for us
+   if it's from glibc.  (Why ctype.h?  It's guaranteed to exist and it
+   doesn't flood the namespace with stuff the way some other headers do.)  */
+#if !defined __GNU_LIBRARY__
+# include <ctype.h>
+#endif
+
+#ifndef __THROW
+# ifndef __GNUC_PREREQ
+#  define __GNUC_PREREQ(maj, min) (0)
+# endif
+# if defined __cplusplus && __GNUC_PREREQ (2,8)
+#  define __THROW	throw ()
+# else
+#  define __THROW
+# endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* For communication from `getopt' to the caller.
+   When `getopt' finds an option that takes an argument,
+   the argument value is returned here.
+   Also, when `ordering' is RETURN_IN_ORDER,
+   each non-option ARGV-element is returned here.  */
+
+extern char *optarg;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to `getopt'.
+
+   On entry to `getopt', zero means this is the first call; initialize.
+
+   When `getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, `optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+extern int optind;
+
+/* Callers store zero here to inhibit the error message `getopt' prints
+   for unrecognized options.  */
+
+extern int opterr;
+
+/* Set to an option character which was unrecognized.  */
+
+extern int optopt;
+
+#ifndef __need_getopt
+/* Describe the long-named options requested by the application.
+   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
+   of `struct option' terminated by an element containing a name which is
+   zero.
+
+   The field `has_arg' is:
+   no_argument		(or 0) if the option does not take an argument,
+   required_argument	(or 1) if the option requires an argument,
+   optional_argument	(or 2) if the option takes an optional argument.
+
+   If the field `flag' is not NULL, it points to a variable that is set
+   to the value given in the field `val' when the option is found, but
+   left unchanged if the option is not found.
+
+   To have a long-named option do something other than set an `int' to
+   a compiled-in constant, such as set a value from `optarg', set the
+   option's `flag' field to zero and its `val' field to a nonzero
+   value (the equivalent single-letter option character, if there is
+   one).  For long options that have a zero `flag' field, `getopt'
+   returns the contents of the `val' field.  */
+
+struct option
+{
+  const char *name;
+  /* has_arg can't be an enum because some compilers complain about
+     type mismatches in all the code that assumes it is an int.  */
+  int has_arg;
+  int *flag;
+  int val;
+};
+
+/* Names for the values of the `has_arg' field of `struct option'.  */
+
+# define no_argument		0
+# define required_argument	1
+# define optional_argument	2
+#endif	/* need getopt */
+
+
+/* Get definitions and prototypes for functions to process the
+   arguments in ARGV (ARGC of them, minus the program name) for
+   options given in OPTS.
+
+   Return the option character from OPTS just read.  Return -1 when
+   there are no more options.  For unrecognized options, or options
+   missing arguments, `optopt' is set to the option letter, and '?' is
+   returned.
+
+   The OPTS string is a list of characters which are recognized option
+   letters, optionally followed by colons, specifying that that letter
+   takes an argument, to be placed in `optarg'.
+
+   If a letter in OPTS is followed by two colons, its argument is
+   optional.  This behavior is specific to the GNU `getopt'.
+
+   The argument `--' causes premature termination of argument
+   scanning, explicitly telling `getopt' that there are no more
+   options.
+
+   If OPTS begins with `-', then non-option arguments are treated as
+   arguments to the option '\1'.  This behavior is specific to the GNU
+   `getopt'.  If OPTS begins with `+', or POSIXLY_CORRECT is set in
+   the environment, then do not permute arguments.  */
+
+extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
+       __THROW;
+
+#ifndef __need_getopt
+extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
+			const char *__shortopts,
+		        const struct option *__longopts, int *__longind)
+       __THROW;
+extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
+			     const char *__shortopts,
+		             const struct option *__longopts, int *__longind)
+       __THROW;
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+/* Make sure we later can get all the definitions and declarations.  */
+#undef __need_getopt
+
+#endif /* getopt.h */

lib/getopt_int.h

@@ -1,29 +1,25 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-
 /* Internal declarations for getopt.
-   Copyright (C) 1989-2023 Free Software Foundation, Inc.
+   Copyright (C) 1989-1994,1996-1999,2001,2003,2004
-   This file is part of the GNU C Library and is also part of gnulib.
+   Free Software Foundation, Inc.
-   Patches to this file should be submitted to both projects.
+   This file is part of the GNU C Library.
 
-   The GNU C Library is free software; you can redistribute it and/or
+   This program is free software; you can redistribute it and/or modify
-   modify it under the terms of the GNU Lesser General Public
+   it under the terms of the GNU General Public License as published by
-   License as published by the Free Software Foundation; either
+   the Free Software Foundation; either version 2, or (at your option)
-   version 2.1 of the License, or (at your option) any later version.
+   any later version.
 
-   The GNU C Library is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   Lesser General Public License for more details.
+   GNU General Public License for more details.
 
-   You should have received a copy of the GNU Lesser General Public
+   You should have received a copy of the GNU General Public License along
-   License along with the GNU C Library; if not, see
+   with this program; if not, write to the Free Software Foundation,
-   <https://www.gnu.org/licenses/>.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 #ifndef _GETOPT_INT_H
 #define _GETOPT_INT_H	1
 
-#include <getopt.h>
-
 extern int _getopt_internal (int ___argc, char **___argv,
 			     const char *__shortopts,
 		             const struct option *__longopts, int *__longind,
@@ -33,32 +29,6 @@ extern int _getopt_internal (int ___argc, char **___argv,
 /* Reentrant versions which can handle parsing multiple argument
    vectors at the same time.  */
 
-/* Describe how to deal with options that follow non-option ARGV-elements.
-
-   REQUIRE_ORDER means don't recognize them as options; stop option
-   processing when the first non-option is seen.  This is what POSIX
-   specifies should happen.
-
-   PERMUTE means permute the contents of ARGV as we scan, so that
-   eventually all the non-options are at the end.  This allows options
-   to be given in any order, even with programs that were not written
-   to expect this.
-
-   RETURN_IN_ORDER is an option available to programs that were
-   written to expect options and other ARGV-elements in any order
-   and that care about the ordering of the two.  We describe each
-   non-option ARGV-element as if it were the argument of an option
-   with character code 1.
-
-   The special argument '--' forces an end of option-scanning regardless
-   of the value of 'ordering'.  In the case of RETURN_IN_ORDER, only
-   '--' can cause 'getopt' to return -1 with 'optind' != ARGC.  */
-
-enum __ord
-  {
-    REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
-  };
-
 /* Data type for reentrant functions.  */
 struct _getopt_data
 {
@@ -83,17 +53,58 @@ struct _getopt_data
      by advancing to the next ARGV-element.  */
   char *__nextchar;
 
-  /* See __ord above.  */
+  /* Describe how to deal with options that follow non-option ARGV-elements.
-  enum __ord __ordering;
+
+     If the caller did not specify anything,
+     the default is REQUIRE_ORDER if the environment variable
+     POSIXLY_CORRECT is defined, PERMUTE otherwise.
+
+     REQUIRE_ORDER means don't recognize them as options;
+     stop option processing when the first non-option is seen.
+     This is what Unix does.
+     This mode of operation is selected by either setting the environment
+     variable POSIXLY_CORRECT, or using `+' as the first character
+     of the list of option characters, or by calling getopt.
+
+     PERMUTE is the default.  We permute the contents of ARGV as we
+     scan, so that eventually all the non-options are at the end.
+     This allows options to be given in any order, even with programs
+     that were not written to expect this.
+
+     RETURN_IN_ORDER is an option available to programs that were
+     written to expect options and other ARGV-elements in any order
+     and that care about the ordering of the two.  We describe each
+     non-option ARGV-element as if it were the argument of an option
+     with character code 1.  Using `-' as the first character of the
+     list of option characters selects this mode of operation.
+
+     The special argument `--' forces an end of option-scanning regardless
+     of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
+     `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
+
+  enum
+    {
+      REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+    } __ordering;
+
+  /* If the POSIXLY_CORRECT environment variable is set
+     or getopt was called.  */
+  int __posixly_correct;
+
 
   /* Handle permutation of arguments.  */
 
   /* Describe the part of ARGV that contains non-options that have
-     been skipped.  'first_nonopt' is the index in ARGV of the first
+     been skipped.  `first_nonopt' is the index in ARGV of the first
-     of them; 'last_nonopt' is the index after the last of them.  */
+     of them; `last_nonopt' is the index after the last of them.  */
 
   int __first_nonopt;
   int __last_nonopt;
+
+#if defined _LIBC && defined USE_NONOPTION_FLAGS
+  int __nonoption_flags_max_len;
+  int __nonoption_flags_len;
+# endif
 };
 
 /* The initializer is necessary to set OPTIND and OPTERR to their
@@ -103,8 +114,8 @@ struct _getopt_data
 extern int _getopt_internal_r (int ___argc, char **___argv,
 			       const char *__shortopts,
 			       const struct option *__longopts, int *__longind,
-			       int __long_only, struct _getopt_data *__data,
+			       int __long_only, int __posixly_correct,
-			       int __posixly_correct);
+			       struct _getopt_data *__data);
 
 extern int _getopt_long_r (int ___argc, char **___argv,
 			   const char *__shortopts,

lib/gettext.h

@@ -0,0 +1,240 @@
+/* Convenience header for conditional use of GNU <libintl.h>.
+   Copyright (C) 1995-1998, 2000-2002, 2004-2006 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+#ifndef _LIBGETTEXT_H
+#define _LIBGETTEXT_H 1
+
+/* NLS can be disabled through the configure --disable-nls option.
+ *
+ * Extra hack in LZMA Utils: if DISABLE_NLS is defined, NLS is disabled
+ * even if ENABLE_NLS is true. See Makefile.am for more information.
+ */
+#if ENABLE_NLS && !defined(DISABLE_NLS)
+
+/* Get declarations of GNU message catalog functions.  */
+# include <libintl.h>
+
+/* You can set the DEFAULT_TEXT_DOMAIN macro to specify the domain used by
+   the gettext() and ngettext() macros.  This is an alternative to calling
+   textdomain(), and is useful for libraries.  */
+# ifdef DEFAULT_TEXT_DOMAIN
+#  undef gettext
+#  define gettext(Msgid) \
+     dgettext (DEFAULT_TEXT_DOMAIN, Msgid)
+#  undef ngettext
+#  define ngettext(Msgid1, Msgid2, N) \
+     dngettext (DEFAULT_TEXT_DOMAIN, Msgid1, Msgid2, N)
+# endif
+
+#else
+
+/* Solaris /usr/include/locale.h includes /usr/include/libintl.h, which
+   chokes if dcgettext is defined as a macro.  So include it now, to make
+   later inclusions of <locale.h> a NOP.  We don't include <libintl.h>
+   as well because people using "gettext.h" will not include <libintl.h>,
+   and also including <libintl.h> would fail on SunOS 4, whereas <locale.h>
+   is OK.  */
+#if defined(__sun)
+# include <locale.h>
+#endif
+
+/* Many header files from the libstdc++ coming with g++ 3.3 or newer include
+   <libintl.h>, which chokes if dcgettext is defined as a macro.  So include
+   it now, to make later inclusions of <libintl.h> a NOP.  */
+#if defined(__cplusplus) && defined(__GNUG__) && (__GNUC__ >= 3)
+# include <cstdlib>
+# if (__GLIBC__ >= 2) || _GLIBCXX_HAVE_LIBINTL_H
+#  include <libintl.h>
+# endif
+#endif
+
+/* Disabled NLS.
+   The casts to 'const char *' serve the purpose of producing warnings
+   for invalid uses of the value returned from these functions.
+   On pre-ANSI systems without 'const', the config.h file is supposed to
+   contain "#define const".  */
+# define gettext(Msgid) ((const char *) (Msgid))
+# define dgettext(Domainname, Msgid) ((const char *) (Msgid))
+# define dcgettext(Domainname, Msgid, Category) ((const char *) (Msgid))
+# define ngettext(Msgid1, Msgid2, N) \
+    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+# define dngettext(Domainname, Msgid1, Msgid2, N) \
+    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+# define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
+    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+# define textdomain(Domainname) ((const char *) (Domainname))
+# define bindtextdomain(Domainname, Dirname) ((const char *) (Dirname))
+# define bind_textdomain_codeset(Domainname, Codeset) ((const char *) (Codeset))
+
+#endif
+
+/* A pseudo function call that serves as a marker for the automated
+   extraction of messages, but does not call gettext().  The run-time
+   translation is done at a different place in the code.
+   The argument, String, should be a literal string.  Concatenated strings
+   and other string expressions won't work.
+   The macro's expansion is not parenthesized, so that it is suitable as
+   initializer for static 'char[]' or 'const char[]' variables.  */
+#define gettext_noop(String) String
+
+/* The separator between msgctxt and msgid in a .mo file.  */
+#define GETTEXT_CONTEXT_GLUE "\004"
+
+/* Pseudo function calls, taking a MSGCTXT and a MSGID instead of just a
+   MSGID.  MSGCTXT and MSGID must be string literals.  MSGCTXT should be
+   short and rarely need to change.
+   The letter 'p' stands for 'particular' or 'special'.  */
+#ifdef DEFAULT_TEXT_DOMAIN
+# define pgettext(Msgctxt, Msgid) \
+   pgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#else
+# define pgettext(Msgctxt, Msgid) \
+   pgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#endif
+#define dpgettext(Domainname, Msgctxt, Msgid) \
+  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, LC_MESSAGES)
+#define dcpgettext(Domainname, Msgctxt, Msgid, Category) \
+  pgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, Category)
+#ifdef DEFAULT_TEXT_DOMAIN
+# define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
+   npgettext_aux (DEFAULT_TEXT_DOMAIN, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#else
+# define npgettext(Msgctxt, Msgid, MsgidPlural, N) \
+   npgettext_aux (NULL, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#endif
+#define dnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
+  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, LC_MESSAGES)
+#define dcnpgettext(Domainname, Msgctxt, Msgid, MsgidPlural, N, Category) \
+  npgettext_aux (Domainname, Msgctxt GETTEXT_CONTEXT_GLUE Msgid, Msgid, MsgidPlural, N, Category)
+
+static inline const char *
+pgettext_aux (const char *domain,
+	      const char *msg_ctxt_id, const char *msgid,
+	      int category)
+{
+  const char *translation = dcgettext (domain, msg_ctxt_id, category);
+  if (translation == msg_ctxt_id)
+    return msgid;
+  else
+    return translation;
+}
+
+static inline const char *
+npgettext_aux (const char *domain,
+	       const char *msg_ctxt_id, const char *msgid,
+	       const char *msgid_plural, unsigned long int n,
+	       int category)
+{
+  const char *translation =
+    dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
+  if (translation == msg_ctxt_id || translation == msgid_plural)
+    return (n == 1 ? msgid : msgid_plural);
+  else
+    return translation;
+}
+
+/* The same thing extended for non-constant arguments.  Here MSGCTXT and MSGID
+   can be arbitrary expressions.  But for string literals these macros are
+   less efficient than those above.  */
+
+#include <string.h>
+
+#define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS 1
+
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+#include <stdlib.h>
+#endif
+
+#define pgettext_expr(Msgctxt, Msgid) \
+  dcpgettext_expr (NULL, Msgctxt, Msgid, LC_MESSAGES)
+#define dpgettext_expr(Domainname, Msgctxt, Msgid) \
+  dcpgettext_expr (Domainname, Msgctxt, Msgid, LC_MESSAGES)
+
+static inline const char *
+dcpgettext_expr (const char *domain,
+		 const char *msgctxt, const char *msgid,
+		 int category)
+{
+  size_t msgctxt_len = strlen (msgctxt) + 1;
+  size_t msgid_len = strlen (msgid) + 1;
+  const char *translation;
+#if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+  char msg_ctxt_id[msgctxt_len + msgid_len];
+#else
+  char buf[1024];
+  char *msg_ctxt_id =
+    (msgctxt_len + msgid_len <= sizeof (buf)
+     ? buf
+     : (char *) malloc (msgctxt_len + msgid_len));
+  if (msg_ctxt_id != NULL)
+#endif
+    {
+      memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
+      msg_ctxt_id[msgctxt_len - 1] = '\004';
+      memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
+      translation = dcgettext (domain, msg_ctxt_id, category);
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+      if (msg_ctxt_id != buf)
+	free (msg_ctxt_id);
+#endif
+      if (translation != msg_ctxt_id)
+	return translation;
+    }
+  return msgid;
+}
+
+#define npgettext_expr(Msgctxt, Msgid, MsgidPlural, N) \
+  dcnpgettext_expr (NULL, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
+#define dnpgettext_expr(Domainname, Msgctxt, Msgid, MsgidPlural, N) \
+  dcnpgettext_expr (Domainname, Msgctxt, Msgid, MsgidPlural, N, LC_MESSAGES)
+
+static inline const char *
+dcnpgettext_expr (const char *domain,
+		  const char *msgctxt, const char *msgid,
+		  const char *msgid_plural, unsigned long int n,
+		  int category)
+{
+  size_t msgctxt_len = strlen (msgctxt) + 1;
+  size_t msgid_len = strlen (msgid) + 1;
+  const char *translation;
+#if _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+  char msg_ctxt_id[msgctxt_len + msgid_len];
+#else
+  char buf[1024];
+  char *msg_ctxt_id =
+    (msgctxt_len + msgid_len <= sizeof (buf)
+     ? buf
+     : (char *) malloc (msgctxt_len + msgid_len));
+  if (msg_ctxt_id != NULL)
+#endif
+    {
+      memcpy (msg_ctxt_id, msgctxt, msgctxt_len - 1);
+      msg_ctxt_id[msgctxt_len - 1] = '\004';
+      memcpy (msg_ctxt_id + msgctxt_len, msgid, msgid_len);
+      translation = dcngettext (domain, msg_ctxt_id, msgid_plural, n, category);
+#if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
+      if (msg_ctxt_id != buf)
+	free (msg_ctxt_id);
+#endif
+      if (!(translation == msg_ctxt_id || translation == msgid_plural))
+	return translation;
+    }
+  return (n == 1 ? msgid : msgid_plural);
+}
+
+#endif /* _LIBGETTEXT_H */

m4/.gitignore

@@ -1,40 +0,0 @@
-build-to-host.m4
-codeset.m4
-extern-inline.m4
-fcntl-o.m4
-gettext.m4
-glibc2.m4
-glibc21.m4
-host-cpu-c-abi.m4
-iconv.m4
-intdiv0.m4
-intl.m4
-intldir.m4
-intlmacosx.m4
-intmax.m4
-inttypes-pri.m4
-inttypes_h.m4
-lcmessage.m4
-lib-ld.m4
-lib-link.m4
-lib-prefix.m4
-libtool.m4
-lock.m4
-longdouble.m4
-longlong.m4
-ltoptions.m4
-ltsugar.m4
-ltversion.m4
-lt~obsolete.m4
-nls.m4
-po.m4
-printf-posix.m4
-progtest.m4
-size_max.m4
-stdint_h.m4
-threadlib.m4
-uintmax_t.m4
-ulonglong.m4
-wchar_t.m4
-wint_t.m4
-xsize.m4

m4/acx_pthread.m4

@@ -0,0 +1,279 @@
+##### http://autoconf-archive.cryp.to/acx_pthread.html
+#
+# SYNOPSIS
+#
+#   ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro figures out how to build C programs using POSIX threads.
+#   It sets the PTHREAD_LIBS output variable to the threads library and
+#   linker flags, and the PTHREAD_CFLAGS output variable to any special
+#   C compiler flags that are needed. (The user can also force certain
+#   compiler flags/libs to be tested by setting these environment
+#   variables.)
+#
+#   Also sets PTHREAD_CC to any special C compiler that is needed for
+#   multi-threaded programs (defaults to the value of CC otherwise).
+#   (This is necessary on AIX to use the special cc_r compiler alias.)
+#
+#   NOTE: You are assumed to not only compile your program with these
+#   flags, but also link it with them as well. e.g. you should link
+#   with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
+#   $LIBS
+#
+#   If you are only building threads programs, you may wish to use
+#   these variables in your default LIBS, CFLAGS, and CC:
+#
+#          LIBS="$PTHREAD_LIBS $LIBS"
+#          CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+#          CC="$PTHREAD_CC"
+#
+#   In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
+#   constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
+#   that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a threads
+#   library is found, and ACTION-IF-NOT-FOUND is a list of commands to
+#   run it if it is not found. If ACTION-IF-FOUND is not specified, the
+#   default action will define HAVE_PTHREAD.
+#
+#   Please let the authors know if this macro fails on any platform, or
+#   if you have any other suggestions or comments. This macro was based
+#   on work by SGJ on autoconf scripts for FFTW (http://www.fftw.org/)
+#   (with help from M. Frigo), as well as ac_pthread and hb_pthread
+#   macros posted by Alejandro Forero Cuervo to the autoconf macro
+#   repository. We are also grateful for the helpful feedback of
+#   numerous users.
+#
+# LAST MODIFICATION
+#
+#   2007-07-29
+#
+# COPYLEFT
+#
+#   Copyright (c) 2007 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+#   This program is free software: you can redistribute it and/or
+#   modify it under the terms of the GNU General Public License as
+#   published by the Free Software Foundation, either version 3 of the
+#   License, or (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#   General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program. If not, see
+#   <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright
+#   owner gives unlimited permission to copy, distribute and modify the
+#   configure scripts that are the output of Autoconf when processing
+#   the Macro. You need not follow the terms of the GNU General Public
+#   License when using or distributing such scripts, even though
+#   portions of the text of the Macro appear in them. The GNU General
+#   Public License (GPL) does govern all other use of the material that
+#   constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the
+#   Autoconf Macro released by the Autoconf Macro Archive. When you
+#   make and distribute a modified version of the Autoconf Macro, you
+#   may extend this special exception to the GPL to apply to your
+#   modified version as well.
+
+AC_DEFUN([ACX_PTHREAD], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_LANG_SAVE
+AC_LANG_C
+acx_pthread_ok=no
+
+# We used to check for pthread.h first, but this fails if pthread.h
+# requires special compiler flags (e.g. on True64 or Sequent).
+# It gets checked for in the link test anyway.
+
+# First of all, check if the user has set any of the PTHREAD_LIBS,
+# etcetera environment variables, and if threads linking works using
+# them:
+if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
+        save_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        save_LIBS="$LIBS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
+        AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
+        AC_MSG_RESULT($acx_pthread_ok)
+        if test x"$acx_pthread_ok" = xno; then
+                PTHREAD_LIBS=""
+                PTHREAD_CFLAGS=""
+        fi
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+fi
+
+# We must check for the threads library under a number of different
+# names; the ordering is very important because some systems
+# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
+# libraries is broken (non-POSIX).
+
+# Create a list of thread flags to try.  Items starting with a "-" are
+# C compiler flags, and other items are library names, except for "none"
+# which indicates that we try without any flags at all, and "pthread-config"
+# which is a program returning the flags for the Pth emulation library.
+
+acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+
+# The ordering *is* (sometimes) important.  Some notes on the
+# individual items follow:
+
+# pthreads: AIX (must check this before -lpthread)
+# none: in case threads are in libc; should be tried before -Kthread and
+#       other compiler flags to prevent continual compiler warnings
+# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
+# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
+# -pthreads: Solaris/gcc
+# -mthreads: Mingw32/gcc, Lynx/gcc
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
+#      doesn't hurt to check since this sometimes defines pthreads too;
+#      also defines -D_REENTRANT)
+#      ... -mt is also the pthreads flag for HP/aCC
+# pthread: Linux, etcetera
+# --thread-safe: KAI C++
+# pthread-config: use pthread-config program (for GNU Pth library)
+
+case "${host_cpu}-${host_os}" in
+        *solaris*)
+
+        # On Solaris (at least, for some versions), libc contains stubbed
+        # (non-functional) versions of the pthreads routines, so link-based
+        # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
+        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
+        # a function called by this macro, so we could check for that, but
+        # who knows whether they'll stub that too in a future libc.)  So,
+        # we'll just look for -pthreads and -lpthread first:
+
+        acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"
+        ;;
+esac
+
+if test x"$acx_pthread_ok" = xno; then
+for flag in $acx_pthread_flags; do
+
+        case $flag in
+                none)
+                AC_MSG_CHECKING([whether pthreads work without any flags])
+                ;;
+
+                -*)
+                AC_MSG_CHECKING([whether pthreads work with $flag])
+                PTHREAD_CFLAGS="$flag"
+                ;;
+
+		pthread-config)
+		AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
+		if test x"$acx_pthread_config" = xno; then continue; fi
+		PTHREAD_CFLAGS="`pthread-config --cflags`"
+		PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+		;;
+
+                *)
+                AC_MSG_CHECKING([for the pthreads library -l$flag])
+                PTHREAD_LIBS="-l$flag"
+                ;;
+        esac
+
+        save_LIBS="$LIBS"
+        save_CFLAGS="$CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+
+        # Check for various functions.  We must include pthread.h,
+        # since some functions may be macros.  (On the Sequent, we
+        # need a special flag -Kthread to make this header compile.)
+        # We check for pthread_join because it is in -lpthread on IRIX
+        # while pthread_create is in libc.  We check for pthread_attr_init
+        # due to DEC craziness with -lpthreads.  We check for
+        # pthread_cleanup_push because it is one of the few pthread
+        # functions on Solaris that doesn't have a non-functional libc stub.
+        # We try pthread_create on general principles.
+        AC_TRY_LINK([#include <pthread.h>],
+                    [pthread_t th; pthread_join(th, 0);
+                     pthread_attr_init(0); pthread_cleanup_push(0, 0);
+                     pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
+                    [acx_pthread_ok=yes])
+
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+
+        AC_MSG_RESULT($acx_pthread_ok)
+        if test "x$acx_pthread_ok" = xyes; then
+                break;
+        fi
+
+        PTHREAD_LIBS=""
+        PTHREAD_CFLAGS=""
+done
+fi
+
+# Various other checks:
+if test "x$acx_pthread_ok" = xyes; then
+        save_LIBS="$LIBS"
+        LIBS="$PTHREAD_LIBS $LIBS"
+        save_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+
+        # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
+	AC_MSG_CHECKING([for joinable pthread attribute])
+	attr_name=unknown
+	for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+	    AC_TRY_LINK([#include <pthread.h>], [int attr=$attr; return attr;],
+                        [attr_name=$attr; break])
+	done
+        AC_MSG_RESULT($attr_name)
+        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
+            AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
+                               [Define to necessary symbol if this constant
+                                uses a non-standard name on your system.])
+        fi
+
+        AC_MSG_CHECKING([if more special flags are required for pthreads])
+        flag=no
+        case "${host_cpu}-${host_os}" in
+            *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
+            *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
+        esac
+        AC_MSG_RESULT(${flag})
+        if test "x$flag" != xno; then
+            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
+        fi
+
+        LIBS="$save_LIBS"
+        CFLAGS="$save_CFLAGS"
+
+        # More AIX lossage: must compile with xlc_r or cc_r
+	if test x"$GCC" != xyes; then
+          AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})
+        else
+          PTHREAD_CC=$CC
+	fi
+else
+        PTHREAD_CC="$CC"
+fi
+
+AC_SUBST(PTHREAD_LIBS)
+AC_SUBST(PTHREAD_CFLAGS)
+AC_SUBST(PTHREAD_CC)
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$acx_pthread_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
+        :
+else
+        acx_pthread_ok=no
+        $2
+fi
+AC_LANG_RESTORE
+])dnl ACX_PTHREAD

m4/ax_pthread.m4

@@ -1,524 +0,0 @@
-dnl SPDX-License-Identifier: GPL-3.0-or-later WITH Autoconf-exception-macro
-
-# ===========================================================================
-#        https://www.gnu.org/software/autoconf-archive/ax_pthread.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
-#
-# DESCRIPTION
-#
-#   This macro figures out how to build C programs using POSIX threads. It
-#   sets the PTHREAD_LIBS output variable to the threads library and linker
-#   flags, and the PTHREAD_CFLAGS output variable to any special C compiler
-#   flags that are needed. (The user can also force certain compiler
-#   flags/libs to be tested by setting these environment variables.)
-#
-#   Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
-#   needed for multi-threaded programs (defaults to the value of CC
-#   respectively CXX otherwise). (This is necessary on e.g. AIX to use the
-#   special cc_r/CC_r compiler alias.)
-#
-#   NOTE: You are assumed to not only compile your program with these flags,
-#   but also to link with them as well. For example, you might link with
-#   $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
-#   $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
-#
-#   If you are only building threaded programs, you may wish to use these
-#   variables in your default LIBS, CFLAGS, and CC:
-#
-#     LIBS="$PTHREAD_LIBS $LIBS"
-#     CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-#     CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
-#     CC="$PTHREAD_CC"
-#     CXX="$PTHREAD_CXX"
-#
-#   In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
-#   has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
-#   that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
-#
-#   Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
-#   PTHREAD_PRIO_INHERIT symbol is defined when compiling with
-#   PTHREAD_CFLAGS.
-#
-#   ACTION-IF-FOUND is a list of shell commands to run if a threads library
-#   is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
-#   is not found. If ACTION-IF-FOUND is not specified, the default action
-#   will define HAVE_PTHREAD.
-#
-#   Please let the authors know if this macro fails on any platform, or if
-#   you have any other suggestions or comments. This macro was based on work
-#   by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
-#   from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
-#   Alejandro Forero Cuervo to the autoconf macro repository. We are also
-#   grateful for the helpful feedback of numerous users.
-#
-#   Updated for Autoconf 2.68 by Daniel Richard G.
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
-#   Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <https://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 31
-
-AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
-AC_DEFUN([AX_PTHREAD], [
-AC_REQUIRE([AC_CANONICAL_HOST])
-AC_REQUIRE([AC_PROG_CC])
-AC_REQUIRE([AC_PROG_SED])
-AC_LANG_PUSH([C])
-ax_pthread_ok=no
-
-# We used to check for pthread.h first, but this fails if pthread.h
-# requires special compiler flags (e.g. on Tru64 or Sequent).
-# It gets checked for in the link test anyway.
-
-# First of all, check if the user has set any of the PTHREAD_LIBS,
-# etcetera environment variables, and if threads linking works using
-# them:
-if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
-        ax_pthread_save_CC="$CC"
-        ax_pthread_save_CFLAGS="$CFLAGS"
-        ax_pthread_save_LIBS="$LIBS"
-        AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
-        AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
-        AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
-        AC_MSG_RESULT([$ax_pthread_ok])
-        if test "x$ax_pthread_ok" = "xno"; then
-                PTHREAD_LIBS=""
-                PTHREAD_CFLAGS=""
-        fi
-        CC="$ax_pthread_save_CC"
-        CFLAGS="$ax_pthread_save_CFLAGS"
-        LIBS="$ax_pthread_save_LIBS"
-fi
-
-# We must check for the threads library under a number of different
-# names; the ordering is very important because some systems
-# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
-# libraries is broken (non-POSIX).
-
-# Create a list of thread flags to try. Items with a "," contain both
-# C compiler flags (before ",") and linker flags (after ","). Other items
-# starting with a "-" are C compiler flags, and remaining items are
-# library names, except for "none" which indicates that we try without
-# any flags at all, and "pthread-config" which is a program returning
-# the flags for the Pth emulation library.
-
-ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
-
-# The ordering *is* (sometimes) important.  Some notes on the
-# individual items follow:
-
-# pthreads: AIX (must check this before -lpthread)
-# none: in case threads are in libc; should be tried before -Kthread and
-#       other compiler flags to prevent continual compiler warnings
-# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
-# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
-#           (Note: HP C rejects this with "bad form for `-t' option")
-# -pthreads: Solaris/gcc (Note: HP C also rejects)
-# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
-#      doesn't hurt to check since this sometimes defines pthreads and
-#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
-#      is present but should not be used directly; and before -mthreads,
-#      because the compiler interprets this as "-mt" + "-hreads")
-# -mthreads: Mingw32/gcc, Lynx/gcc
-# pthread: Linux, etcetera
-# --thread-safe: KAI C++
-# pthread-config: use pthread-config program (for GNU Pth library)
-
-case $host_os in
-
-        freebsd*)
-
-        # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
-        # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
-
-        ax_pthread_flags="-kthread lthread $ax_pthread_flags"
-        ;;
-
-        hpux*)
-
-        # From the cc(1) man page: "[-mt] Sets various -D flags to enable
-        # multi-threading and also sets -lpthread."
-
-        ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
-        ;;
-
-        openedition*)
-
-        # IBM z/OS requires a feature-test macro to be defined in order to
-        # enable POSIX threads at all, so give the user a hint if this is
-        # not set. (We don't define these ourselves, as they can affect
-        # other portions of the system API in unpredictable ways.)
-
-        AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
-            [
-#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
-             AX_PTHREAD_ZOS_MISSING
-#            endif
-            ],
-            [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
-        ;;
-
-        solaris*)
-
-        # On Solaris (at least, for some versions), libc contains stubbed
-        # (non-functional) versions of the pthreads routines, so link-based
-        # tests will erroneously succeed. (N.B.: The stubs are missing
-        # pthread_cleanup_push, or rather a function called by this macro,
-        # so we could check for that, but who knows whether they'll stub
-        # that too in a future libc.)  So we'll check first for the
-        # standard Solaris way of linking pthreads (-mt -lpthread).
-
-        ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
-        ;;
-esac
-
-# Are we compiling with Clang?
-
-AC_CACHE_CHECK([whether $CC is Clang],
-    [ax_cv_PTHREAD_CLANG],
-    [ax_cv_PTHREAD_CLANG=no
-     # Note that Autoconf sets GCC=yes for Clang as well as GCC
-     if test "x$GCC" = "xyes"; then
-        AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
-            [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
-#            if defined(__clang__) && defined(__llvm__)
-             AX_PTHREAD_CC_IS_CLANG
-#            endif
-            ],
-            [ax_cv_PTHREAD_CLANG=yes])
-     fi
-    ])
-ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
-
-
-# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
-
-# Note that for GCC and Clang -pthread generally implies -lpthread,
-# except when -nostdlib is passed.
-# This is problematic using libtool to build C++ shared libraries with pthread:
-# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
-# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
-# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
-# To solve this, first try -pthread together with -lpthread for GCC
-
-AS_IF([test "x$GCC" = "xyes"],
-      [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
-
-# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
-
-AS_IF([test "x$ax_pthread_clang" = "xyes"],
-      [ax_pthread_flags="-pthread,-lpthread -pthread"])
-
-
-# The presence of a feature test macro requesting re-entrant function
-# definitions is, on some systems, a strong hint that pthreads support is
-# correctly enabled
-
-case $host_os in
-        darwin* | hpux* | linux* | osf* | solaris*)
-        ax_pthread_check_macro="_REENTRANT"
-        ;;
-
-        aix*)
-        ax_pthread_check_macro="_THREAD_SAFE"
-        ;;
-
-        *)
-        ax_pthread_check_macro="--"
-        ;;
-esac
-AS_IF([test "x$ax_pthread_check_macro" = "x--"],
-      [ax_pthread_check_cond=0],
-      [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
-
-
-if test "x$ax_pthread_ok" = "xno"; then
-for ax_pthread_try_flag in $ax_pthread_flags; do
-
-        case $ax_pthread_try_flag in
-                none)
-                AC_MSG_CHECKING([whether pthreads work without any flags])
-                ;;
-
-                *,*)
-                PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
-                PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
-                AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
-                ;;
-
-                -*)
-                AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
-                PTHREAD_CFLAGS="$ax_pthread_try_flag"
-                ;;
-
-                pthread-config)
-                AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
-                AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
-                PTHREAD_CFLAGS="`pthread-config --cflags`"
-                PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
-                ;;
-
-                *)
-                AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
-                PTHREAD_LIBS="-l$ax_pthread_try_flag"
-                ;;
-        esac
-
-        ax_pthread_save_CFLAGS="$CFLAGS"
-        ax_pthread_save_LIBS="$LIBS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-
-        # Check for various functions.  We must include pthread.h,
-        # since some functions may be macros.  (On the Sequent, we
-        # need a special flag -Kthread to make this header compile.)
-        # We check for pthread_join because it is in -lpthread on IRIX
-        # while pthread_create is in libc.  We check for pthread_attr_init
-        # due to DEC craziness with -lpthreads.  We check for
-        # pthread_cleanup_push because it is one of the few pthread
-        # functions on Solaris that doesn't have a non-functional libc stub.
-        # We try pthread_create on general principles.
-
-        AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
-#                       if $ax_pthread_check_cond
-#                        error "$ax_pthread_check_macro must be defined"
-#                       endif
-                        static void *some_global = NULL;
-                        static void routine(void *a)
-                          {
-                             /* To avoid any unused-parameter or
-                                unused-but-set-parameter warning.  */
-                             some_global = a;
-                          }
-                        static void *start_routine(void *a) { return a; }],
-                       [pthread_t th; pthread_attr_t attr;
-                        pthread_create(&th, 0, start_routine, 0);
-                        pthread_join(th, 0);
-                        pthread_attr_init(&attr);
-                        pthread_cleanup_push(routine, 0);
-                        pthread_cleanup_pop(0) /* ; */])],
-            [ax_pthread_ok=yes],
-            [])
-
-        CFLAGS="$ax_pthread_save_CFLAGS"
-        LIBS="$ax_pthread_save_LIBS"
-
-        AC_MSG_RESULT([$ax_pthread_ok])
-        AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
-
-        PTHREAD_LIBS=""
-        PTHREAD_CFLAGS=""
-done
-fi
-
-
-# Clang needs special handling, because older versions handle the -pthread
-# option in a rather... idiosyncratic way
-
-if test "x$ax_pthread_clang" = "xyes"; then
-
-        # Clang takes -pthread; it has never supported any other flag
-
-        # (Note 1: This will need to be revisited if a system that Clang
-        # supports has POSIX threads in a separate library.  This tends not
-        # to be the way of modern systems, but it's conceivable.)
-
-        # (Note 2: On some systems, notably Darwin, -pthread is not needed
-        # to get POSIX threads support; the API is always present and
-        # active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
-        # -pthread does define _REENTRANT, and while the Darwin headers
-        # ignore this macro, third-party headers might not.)
-
-        # However, older versions of Clang make a point of warning the user
-        # that, in an invocation where only linking and no compilation is
-        # taking place, the -pthread option has no effect ("argument unused
-        # during compilation").  They expect -pthread to be passed in only
-        # when source code is being compiled.
-        #
-        # Problem is, this is at odds with the way Automake and most other
-        # C build frameworks function, which is that the same flags used in
-        # compilation (CFLAGS) are also used in linking.  Many systems
-        # supported by AX_PTHREAD require exactly this for POSIX threads
-        # support, and in fact it is often not straightforward to specify a
-        # flag that is used only in the compilation phase and not in
-        # linking.  Such a scenario is extremely rare in practice.
-        #
-        # Even though use of the -pthread flag in linking would only print
-        # a warning, this can be a nuisance for well-run software projects
-        # that build with -Werror.  So if the active version of Clang has
-        # this misfeature, we search for an option to squash it.
-
-        AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
-            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
-            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
-             # Create an alternate version of $ac_link that compiles and
-             # links in two steps (.c -> .o, .o -> exe) instead of one
-             # (.c -> exe), because the warning occurs only in the second
-             # step
-             ax_pthread_save_ac_link="$ac_link"
-             ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
-             ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
-             ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
-             ax_pthread_save_CFLAGS="$CFLAGS"
-             for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
-                AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
-                CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
-                ac_link="$ax_pthread_save_ac_link"
-                AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
-                    [ac_link="$ax_pthread_2step_ac_link"
-                     AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
-                         [break])
-                    ])
-             done
-             ac_link="$ax_pthread_save_ac_link"
-             CFLAGS="$ax_pthread_save_CFLAGS"
-             AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
-             ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
-            ])
-
-        case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
-                no | unknown) ;;
-                *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
-        esac
-
-fi # $ax_pthread_clang = yes
-
-
-
-# Various other checks:
-if test "x$ax_pthread_ok" = "xyes"; then
-        ax_pthread_save_CFLAGS="$CFLAGS"
-        ax_pthread_save_LIBS="$LIBS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-
-        # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-        AC_CACHE_CHECK([for joinable pthread attribute],
-            [ax_cv_PTHREAD_JOINABLE_ATTR],
-            [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
-             for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
-                 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
-                                                 [int attr = $ax_pthread_attr; return attr /* ; */])],
-                                [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
-                                [])
-             done
-            ])
-        AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
-               test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
-               test "x$ax_pthread_joinable_attr_defined" != "xyes"],
-              [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
-                                  [$ax_cv_PTHREAD_JOINABLE_ATTR],
-                                  [Define to necessary symbol if this constant
-                                   uses a non-standard name on your system.])
-               ax_pthread_joinable_attr_defined=yes
-              ])
-
-        AC_CACHE_CHECK([whether more special flags are required for pthreads],
-            [ax_cv_PTHREAD_SPECIAL_FLAGS],
-            [ax_cv_PTHREAD_SPECIAL_FLAGS=no
-             case $host_os in
-             solaris*)
-             ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
-             ;;
-             esac
-            ])
-        AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
-               test "x$ax_pthread_special_flags_added" != "xyes"],
-              [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
-               ax_pthread_special_flags_added=yes])
-
-        AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
-            [ax_cv_PTHREAD_PRIO_INHERIT],
-            [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
-                                             [[int i = PTHREAD_PRIO_INHERIT;
-                                               return i;]])],
-                            [ax_cv_PTHREAD_PRIO_INHERIT=yes],
-                            [ax_cv_PTHREAD_PRIO_INHERIT=no])
-            ])
-        AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
-               test "x$ax_pthread_prio_inherit_defined" != "xyes"],
-              [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
-               ax_pthread_prio_inherit_defined=yes
-              ])
-
-        CFLAGS="$ax_pthread_save_CFLAGS"
-        LIBS="$ax_pthread_save_LIBS"
-
-        # More AIX lossage: compile with *_r variant
-        if test "x$GCC" != "xyes"; then
-            case $host_os in
-                aix*)
-                AS_CASE(["x/$CC"],
-                    [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
-                    [#handle absolute path differently from PATH based program lookup
-                     AS_CASE(["x$CC"],
-                         [x/*],
-                         [
-			   AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
-			   AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
-			 ],
-                         [
-			   AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
-			   AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
-			 ]
-                     )
-                    ])
-                ;;
-            esac
-        fi
-fi
-
-test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
-test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
-
-AC_SUBST([PTHREAD_LIBS])
-AC_SUBST([PTHREAD_CFLAGS])
-AC_SUBST([PTHREAD_CC])
-AC_SUBST([PTHREAD_CXX])
-
-# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test "x$ax_pthread_ok" = "xyes"; then
-        ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
-        :
-else
-        ax_pthread_ok=no
-        $2
-fi
-AC_LANG_POP
-])dnl AX_PTHREAD

m4/getopt.m4

@@ -1,70 +1,83 @@
-dnl SPDX-License-Identifier: FSFULLR
+# getopt.m4 serial 13
-
+dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
-# getopt.m4 serial 49 (modified version)
-dnl Copyright (C) 2002-2006, 2008-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-# This version has been modified to reduce complexity since we only need
+# The getopt module assume you want GNU getopt, with getopt_long etc,
-# GNU getopt_long and do not care about replacing getopt.
+# rather than vanilla POSIX getopt.  This means your code should
-#
+# always include <getopt.h> for the getopt prototypes.
-# Pass gl_replace_getopt=yes (or any non-empty value instead of "yes") as
-# an argument to configure to force the use of the getopt_long replacement.
-
-AC_DEFUN([gl_FUNC_GETOPT_GNU],
-[
-  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
-
-  if test -n "$gl_replace_getopt"; then
-    gl_GETOPT_SUBSTITUTE
-  fi
-])
-
-AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
-[
-  if test -z "$gl_replace_getopt"; then
-    AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
-  fi
-
-  if test -z "$gl_replace_getopt"; then
-    AC_CHECK_FUNCS([getopt_long], [], [gl_replace_getopt=yes])
-  fi
-
-  dnl BSD getopt_long uses a way to reset option processing, that is different
-  dnl from GNU and Solaris (which copied the GNU behavior). We support both
-  dnl GNU and BSD style resetting of getopt_long(), so there's no need to use
-  dnl GNU getopt_long() on BSD due to different resetting style.
-  if test -z "$gl_replace_getopt"; then
-    AC_CHECK_DECL([optreset],
-      [AC_DEFINE([HAVE_OPTRESET], 1,
-        [Define to 1 if getopt.h declares extern int optreset.])],
-      [], [#include <getopt.h>])
-  fi
-
-  dnl POSIX 2008 does not specify leading '+' behavior, but see
-  dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
-  dnl the next version of POSIX.  We don't use that feature, so this
-  dnl is not a problem for us. Thus, the respective test was removed here.
-
-  dnl Checks for getopt handling '-' as a leading character in an option
-  dnl string were removed, since we also don't use that feature.
-
-])
 
 AC_DEFUN([gl_GETOPT_SUBSTITUTE],
 [
   AC_LIBOBJ([getopt])
   AC_LIBOBJ([getopt1])
+  gl_GETOPT_SUBSTITUTE_HEADER
+  gl_PREREQ_GETOPT
+])
 
-  AC_CHECK_HEADERS_ONCE([sys/cdefs.h])
+AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
-
+[
+  GETOPT_H=getopt.h
   AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
     [Define to rpl_ if the getopt replacement functions and variables
      should be used.])
-
-  GETOPT_H=getopt.h
   AC_SUBST([GETOPT_H])
 ])
 
-AC_DEFUN([gl_GETOPT], [gl_FUNC_GETOPT_GNU])
+AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
+[
+  if test -z "$GETOPT_H"; then
+    AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
+  fi
+
+  if test -z "$GETOPT_H"; then
+    AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
+  fi
+
+  dnl BSD getopt_long uses an incompatible method to reset option processing,
+  dnl and (as of 2004-10-15) mishandles optional option-arguments.
+  if test -z "$GETOPT_H"; then
+    AC_CHECK_DECL([optreset], [GETOPT_H=getopt.h], [], [#include <getopt.h>])
+  fi
+
+  dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
+  dnl option string (as of 2005-05-05).
+  if test -z "$GETOPT_H"; then
+    AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
+      [AC_RUN_IFELSE(
+	[AC_LANG_PROGRAM([#include <getopt.h>],
+	   [[
+	     char *myargv[3];
+	     myargv[0] = "conftest";
+	     myargv[1] = "-+";
+	     myargv[2] = 0;
+	     return getopt (2, myargv, "+a") != '?';
+	   ]])],
+	[gl_cv_func_gnu_getopt=yes],
+	[gl_cv_func_gnu_getopt=no],
+	[dnl cross compiling - pessimistically guess based on decls
+	 dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
+	 dnl option string (as of 2005-05-05).
+	 AC_CHECK_DECL([getopt_clip],
+	   [gl_cv_func_gnu_getopt=no], [gl_cv_func_gnu_getopt=yes],
+	   [#include <getopt.h>])])])
+    if test "$gl_cv_func_gnu_getopt" = "no"; then
+      GETOPT_H=getopt.h
+    fi
+  fi
+])
+
+AC_DEFUN([gl_GETOPT_IFELSE],
+[
+  AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
+  AS_IF([test -n "$GETOPT_H"], [$1], [$2])
+])
+
+AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
+
+# Prerequisites of lib/getopt*.
+AC_DEFUN([gl_PREREQ_GETOPT],
+[
+  AC_CHECK_DECLS_ONCE([getenv])
+])

m4/posix-shell.m4

@@ -1,66 +0,0 @@
-dnl SPDX-License-Identifier: FSFULLR
-
-# posix-shell.m4
-# serial 1
-dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# Find a POSIX-conforming shell.
-
-# Written by Paul Eggert.
-
-# If a POSIX-conforming shell can be found, set POSIX_SHELL and
-# PREFERABLY_POSIX_SHELL to it.  If not, set POSIX_SHELL to the
-# empty string and PREFERABLY_POSIX_SHELL to '/bin/sh'.
-
-AC_DEFUN([gl_POSIX_SHELL],
-[
-  AC_CACHE_CHECK([for a shell that conforms to POSIX], [gl_cv_posix_shell],
-    [gl_test_posix_shell_script='
-       func_return () {
-         (exit [$]1)
-       }
-       func_success () {
-         func_return 0
-       }
-       func_failure () {
-         func_return 1
-       }
-       func_ret_success () {
-         return 0
-       }
-       func_ret_failure () {
-         return 1
-       }
-       subshell_umask_sanity () {
-         (umask 22; (umask 0); test $(umask) -eq 22)
-       }
-       test "[$](echo foo)" = foo &&
-       func_success &&
-       ! func_failure &&
-       func_ret_success &&
-       ! func_ret_failure &&
-       (set x && func_ret_success y && test x = "[$]1") &&
-       subshell_umask_sanity
-     '
-     for gl_cv_posix_shell in \
-         "$CONFIG_SHELL" "$SHELL" /bin/sh /bin/bash /bin/ksh /bin/sh5 no; do
-       case $gl_cv_posix_shell in
-         /*)
-           "$gl_cv_posix_shell" -c "$gl_test_posix_shell_script" 2>/dev/null \
-             && break;;
-       esac
-     done])
-
-  if test "$gl_cv_posix_shell" != no; then
-    POSIX_SHELL=$gl_cv_posix_shell
-    PREFERABLY_POSIX_SHELL=$POSIX_SHELL
-  else
-    POSIX_SHELL=
-    PREFERABLY_POSIX_SHELL=/bin/sh
-  fi
-  AC_SUBST([POSIX_SHELL])
-  AC_SUBST([PREFERABLY_POSIX_SHELL])
-])

m4/tuklib_common.m4

@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# SYNOPSIS
-#
-#   TUKLIB_COMMON
-#
-# DESCRIPTION
-#
-#   Common checks for tuklib.
-#
-#############################################################################
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-AC_DEFUN_ONCE([TUKLIB_COMMON], [
-AC_REQUIRE([AC_CANONICAL_HOST])
-AC_REQUIRE([AC_PROG_CC_C99])
-AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-])dnl

m4/tuklib_cpucores.m4

@@ -1,181 +0,0 @@
-# SPDX-License-Identifier: 0BSD
-
-#############################################################################
-#
-# SYNOPSIS
-#
-#   TUKLIB_CPUCORES
-#
-# DESCRIPTION
-#
-#   Check how to find out the number of available CPU cores in the system.
-#   This information is used by tuklib_cpucores.c.
-#
-#   Supported methods:
-#     - GetSystemInfo(): Windows (including Cygwin)
-#     - sched_getaffinity(): glibc (GNU/Linux, GNU/kFreeBSD)
-#     - cpuset_getaffinity(): FreeBSD
-#     - sysctl(): BSDs, OS/2
-#     - sysconf(): GNU/Linux, Solaris, Tru64, IRIX, AIX, QNX, Cygwin (but
-#       GetSystemInfo() is used on Cygwin)
-#     - pstat_getdynamic(): HP-UX
-#
-#############################################################################
-#
-# Author: Lasse Collin
-#
-#############################################################################
-
-AC_DEFUN_ONCE([TUKLIB_CPUCORES], [
-AC_REQUIRE([TUKLIB_COMMON])
-
-# sys/param.h might be needed by sys/sysctl.h.
-AC_CHECK_HEADERS([sys/param.h])
-
-AC_CACHE_CHECK([how to detect the number of available CPU cores],
-	[tuklib_cv_cpucores_method], [
-
-# Maybe checking $host_os would be enough but this matches what
-# tuklib_cpucores.c does.
-#
-# NOTE: IRIX has a compiler that doesn't error out with #error, so use
-# a non-compilable text instead of #error to generate an error.
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-#if defined(_WIN32) || defined(__CYGWIN__)
-int main(void) { return 0; }
-#else
-compile error
-#endif
-]])], [tuklib_cv_cpucores_method=special], [
-
-# glibc-based systems (GNU/Linux and GNU/kFreeBSD) have sched_getaffinity().
-# The CPU_COUNT() macro was added in glibc 2.9 so we try to link the
-# test program instead of merely compiling it. glibc 2.9 is old enough that
-# if someone uses the code on older glibc, the fallback to sysconf() should
-# be good enough.
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#include <sched.h>
-int
-main(void)
-{
-	cpu_set_t cpu_mask;
-	sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask);
-	return CPU_COUNT(&cpu_mask);
-}
-]])], [tuklib_cv_cpucores_method=sched_getaffinity], [
-
-# FreeBSD has both cpuset and sysctl. Look for cpuset first because
-# it's a better approach.
-#
-# This test would match on GNU/kFreeBSD too but it would require
-# -lfreebsd-glue when linking and thus in the current form this would
-# fail on GNU/kFreeBSD. The above test for sched_getaffinity() matches
-# on GNU/kFreeBSD so the test below should never run on that OS.
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#include <sys/param.h>
-#include <sys/cpuset.h>
-
-int
-main(void)
-{
-	cpuset_t set;
-	cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
-			sizeof(set), &set);
-	return 0;
-}
-]])], [tuklib_cv_cpucores_method=cpuset], [
-
-# On OS/2, both sysconf() and sysctl() pass the tests in this file,
-# but only sysctl() works. On QNX it's the opposite: only sysconf() works
-# (although it assumes that _POSIX_SOURCE, _XOPEN_SOURCE, and _POSIX_C_SOURCE
-# are undefined or alternatively _QNX_SOURCE is defined).
-#
-# We test sysctl() first and intentionally break the sysctl() test on QNX
-# so that sysctl() is never used on QNX.
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#ifdef __QNX__
-compile error
-#endif
-#ifdef HAVE_SYS_PARAM_H
-#	include <sys/param.h>
-#endif
-#include <sys/sysctl.h>
-int
-main(void)
-{
-#ifdef HW_NCPUONLINE
-	/* This is preferred on OpenBSD, see tuklib_cpucores.c. */
-	int name[2] = { CTL_HW, HW_NCPUONLINE };
-#else
-	int name[2] = { CTL_HW, HW_NCPU };
-#endif
-	int cpus;
-	size_t cpus_size = sizeof(cpus);
-	sysctl(name, 2, &cpus, &cpus_size, NULL, 0);
-	return 0;
-}
-]])], [tuklib_cv_cpucores_method=sysctl], [
-
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#include <unistd.h>
-int
-main(void)
-{
-	long i;
-#ifdef _SC_NPROCESSORS_ONLN
-	/* Many systems using sysconf() */
-	i = sysconf(_SC_NPROCESSORS_ONLN);
-#else
-	/* IRIX */
-	i = sysconf(_SC_NPROC_ONLN);
-#endif
-	return 0;
-}
-]])], [tuklib_cv_cpucores_method=sysconf], [
-
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#include <sys/param.h>
-#include <sys/pstat.h>
-
-int
-main(void)
-{
-	struct pst_dynamic pst;
-	pstat_getdynamic(&pst, sizeof(pst), 1, 0);
-	(void)pst.psd_proc_cnt;
-	return 0;
-}
-]])], [tuklib_cv_cpucores_method=pstat_getdynamic], [
-
-	tuklib_cv_cpucores_method=unknown
-])])])])])])])
-
-case $tuklib_cv_cpucores_method in
-	sched_getaffinity)
-		AC_DEFINE([TUKLIB_CPUCORES_SCHED_GETAFFINITY], [1],
-			[Define to 1 if the number of available CPU cores
-			can be detected with sched_getaffinity()])
-		;;
-	cpuset)
-		AC_DEFINE([TUKLIB_CPUCORES_CPUSET], [1],
-			[Define to 1 if the number of available CPU cores
-			can be detected with cpuset(2).])
-		;;
-	sysctl)
-		AC_DEFINE([TUKLIB_CPUCORES_SYSCTL], [1],
-			[Define to 1 if the number of available CPU cores
-			can be detected with sysctl().])
-		;;
-	sysconf)
-		AC_DEFINE([TUKLIB_CPUCORES_SYSCONF], [1],
-			[Define to 1 if the number of available CPU cores
-			can be detected with sysconf(_SC_NPROCESSORS_ONLN)
-			or sysconf(_SC_NPROC_ONLN).])
-		;;
-	pstat_getdynamic)
-		AC_DEFINE([TUKLIB_CPUCORES_PSTAT_GETDYNAMIC], [1],
-			[Define to 1 if the number of available CPU cores
-			can be detected with pstat_getdynamic().])
-		;;
-esac
-])dnl