Merge pull request #1753 from lz4/fix_read_oob

Fix read oob

.circleci/config.yml

@@ -43,26 +43,21 @@ jobs:
     # Test
     #   This would typically be a build job when using workflows, possibly combined with build
     # This is based on your 1.0 configuration file or project settings
-    - run: CFLAGS= make clangtest && make clean
-    - run: g++ -v; make cxxtest   && make clean
-    - run: gcc -v; g++ -v; make ctocpptest && make clean
+    - run: CC=clang CFLAGS="-Werror -O0" make all && make clean
+    - run: c++ -v; make cxxtest V=1 && make clean
+    - run: cc -v; c++ -v; make ctocxxtest && make clean
     - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -Werror" make check && make clean
     - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
-    - run: gcc-6 -v; CC=gcc-6 MOREFLAGS="-O2 -Werror" make check  && make clean
-    - run: make cmake                && make clean
+    - run: gcc-6 -v; CC=gcc-6 CFLAGS="-O2 -Werror" make check  && make clean
+    - run: make cmakebuild           && make clean
     - run: make -C tests test-lz4
     - run: make -C tests test-lz4c
     - run: make -C tests test-frametest
     - run: make -C tests test-fuzzer && make clean
     - run: make -C lib all           && make clean
-    - run: pyenv global 3.4.4; make versionsTest MOREFLAGS=-I/usr/include/x86_64-linux-gnu && make clean
+    - run: pyenv global 3.14; CPPFLAGS=-I/usr/include/x86_64-linux-gnu make versionsTest && make clean
     - run: make test-install         && make clean
     - run: gcc -v; CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
-    - run: clang -v; make staticAnalyze && make clean
-    - run: make platformTest CC=powerpc-linux-gnu-gcc QEMU_SYS=qemu-ppc-static                   && make clean
-    - run: make platformTest CC=powerpc-linux-gnu-gcc QEMU_SYS=qemu-ppc64-static MOREFLAGS=-m64  && make clean
-    - run: make platformTest CC=arm-linux-gnueabi-gcc QEMU_SYS=qemu-arm-static                   && make clean
-    - run: make platformTest CC=aarch64-linux-gnu-gcc QEMU_SYS=qemu-aarch64-static               && make clean
     # Teardown
     #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
     # Save test results

.cirrus.yml

@@ -1,5 +0,0 @@
-freebsd_instance:
-  image_family: freebsd-12-2
-
-task:
-  script: pkg install -y gmake && gmake test

.clang-format

@@ -0,0 +1,132 @@
+# This is the configuration file for clang-format, an automatic code formatter.
+# Introduction: https://clang.llvm.org/docs/ClangFormat.html
+# Supported options: https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+
+Language: Cpp
+Standard: Latest
+
+ColumnLimit: 110
+
+UseTab: Never
+IndentWidth: 4
+PPIndentWidth: 2
+ContinuationIndentWidth: 4
+
+LineEnding: LF
+InsertNewlineAtEOF: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MaxEmptyLinesToKeep: 1
+
+IndentCaseBlocks: false
+IndentCaseLabels: false
+IndentGotoLabels: false
+IndentPPDirectives: AfterHash
+IndentWrappedFunctionNames: false
+
+AlignAfterOpenBracket: Align
+AlignArrayOfStructures: Right
+AlignEscapedNewlines: Left
+AlignOperands: Align
+AlignConsecutiveAssignments:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+    AlignCompound:    false
+    PadOperators:     false
+AlignConsecutiveBitFields:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignConsecutiveDeclarations:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignConsecutiveMacros:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignTrailingComments:
+    Kind:           Leave
+    OverEmptyLines: 0
+
+BinPackArguments: true
+BinPackParameters: false
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: false
+
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortEnumsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: AllIfsAndElse
+AllowShortLoopsOnASingleLine: false
+
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+BraceWrapping:
+    AfterCaseLabel:        false
+    AfterControlStatement: Never
+    AfterEnum:             false
+    AfterExternBlock:      false
+    AfterFunction:         true
+    AfterStruct:           false
+    AfterUnion:            false
+    BeforeElse:            false
+    BeforeWhile:           false
+    IndentBraces:          false
+    SplitEmptyFunction:    false
+    SplitEmptyRecord:      false
+BreakAfterAttributes: Never
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInlineASMColon: OnlyMultiline
+BreakBeforeTernaryOperators: true
+
+DerivePointerAlignment: false
+PointerAlignment: Left
+
+QualifierAlignment: Custom
+QualifierOrder: ["inline", "static", "volatile", "restrict", "const", "type"]
+
+ReflowComments: false
+BreakStringLiterals: false
+RemoveSemicolon: true
+RemoveParentheses: ReturnStatement
+InsertBraces: false
+SeparateDefinitionBlocks: Always
+
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAroundPointerQualifiers: Default
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCaseColon: false
+SpaceBeforeParens: ControlStatements
+BitFieldColonSpacing: Both
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyBlock: false
+SpacesBeforeTrailingComments: 1
+SpacesInSquareBrackets: false
+SpacesInLineCommentPrefix:
+    Minimum: 1
+    Maximum: -1
+
+SortIncludes: Never
+IncludeBlocks: Preserve
+IncludeIsMainRegex: ""
+IncludeCategories:
+    - {Regex: "<.*>",   Priority: -2, CaseSensitive: true}
+    - {Regex: "\".*\"", Priority: -1, CaseSensitive: true}
+
+AttributeMacros: ["__capability"]
+StatementAttributeLikeMacros: []
+StatementMacros: []
+
+PenaltyBreakAssignment: 200
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakOpenParenthesis: 0
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 10
+PenaltyIndentedWhitespace: 0
+PenaltyReturnTypeOnItsOwnLine: 60

.github/dependabot.yaml

@@ -4,4 +4,4 @@ updates:
   - package-ecosystem: github-actions
     directory: /
     schedule:
-      interval: weekly
+      interval: monthly

.github/workflows/README.md

@@ -1,10 +1,39 @@
 This directory contains [GitHub Actions](https://github.com/features/actions) workflow files.
 
+# Workflow Organization
+
+The CI/CD workflows are organized into focused, maintainable files:
+
+## Core Testing Workflows
+- **`compilers.yml`** - Tests compatibility across different C compilers (GCC, Clang versions)
+- **`core-tests.yml`** - Core LZ4 functionality testing (benchmarks, fuzzing, frame format, ABI compatibility, etc.)
+- **`sanitizers.yml`** - Memory safety testing (AddressSanitizer, MemorySanitizer, UBSan, ThreadSanitizer)
+
+## Platform & Build System Testing
+- **`cross-platform.yml`** - Cross-platform testing using QEMU emulation and native macOS builds
+- **`build-systems.yml`** - Alternative build systems (Visual Studio, Meson)
+- **`cmake-test.yml`** - CMake build system testing
+
+## Code Quality & Analysis
+- **`code-quality.yml`** - Static analysis tools (cppcheck, scan-build, valgrind, unicode lint)
+- **`oss-fuzz.yml`** - OSS-Fuzz integration for continuous fuzzing
+
+## Utilities & Environment
+- **`release-environment.yml`** - Release validation and environment information gathering
+- **`scorecard.yml`** - Security scorecard analysis
+
+This organization provides:
+- **Better maintainability** - Changes to specific test categories only affect relevant files
+- **Improved parallelization** - Workflows run independently and in parallel
+- **Clearer failure isolation** - Easier to identify which types of tests are failing
+- **Enhanced readability** - Each workflow has a single, clear responsibility
+
 # Known issues
 
-## USAN, ASAN (`lz4-ubsan-x64`, `lz4-ubsan-x86`, `lz4-asan-x64`)
+## Sanitizers (UBSan, ASan) - `sanitizers.yml`
 
-For now, `lz4-ubsan-*` uses the `-fsanitize-recover=pointer-overflow` flag:
+### UBSan (UndefinedBehaviorSanitizer)
+For now, UBSan tests use the `-fsanitize-recover=pointer-overflow` flag:
 there are known cases of pointer overflow arithmetic within `lz4.c` fast compression.
 These cases are not dangerous with known architecture,
 but they are not guaranteed to work by the C standard,
@@ -18,32 +47,10 @@ not active anywhere today.
 Therefore, a more acceptable work-around will have to be found first.
 
 
-
-## cppcheck (`lz4-cppcheck`)
+## cppcheck - `code-quality.yml`
 
 This test script ignores the exit code of `make cppcheck`.
 Because this project doesn't 100% follow their recommendation.
 Also sometimes it reports false positives.
 
 
-
-# Notes
-
-- You can investigate various information at the right pane of GitHub
-  Actions report page.
-
-| Item                      | Section in the right pane             |
-| ------------------------- | ------------------------------------- |
-| OS, VM                    | Set up job                            |
-| git repo, commit hash     | Run actions/checkout@v2               |
-| Version of tools          | Environment info                      |
-
-
-
-# Difference with `.travis.yml`
-
-The following tests are not be included due to limitation of GH-Actions.
-
-- name: aarch64 real-hw tests
-- name: PPC64LE real-hw tests
-- name: IBM s390x real-hw tests

.github/workflows/build-systems.yml

@@ -0,0 +1,109 @@
+# Build system testing (Visual Studio, Meson)
+name: Build Systems
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  windows-visual-studio:
+    name: ${{ matrix.system.os }} Visual Studio
+    runs-on: ${{ matrix.system.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        system:
+          - { os: windows-2022, build_path: ".\\build\\VS2022" }
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Build Win32 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-win32-debug.bat
+        popd
+
+    - name: Build x64 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-x64-debug.bat
+        popd
+
+    - name: Generate VS solution
+      run: |
+        pushd ".\\build\\visual"
+        .\\generate_vs2022.cmd
+        popd
+
+    - name: Upload generated VS2022 directory
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      with:
+        name: VS2022-Build-Dir
+        path: "build/visual/Visual Studio 17 2022"
+
+    - name: Build executable with generated solution
+      run: cmake --build "build/visual/Visual Studio 17 2022" --config Debug
+
+    - name: Run minimal runtime test
+      run: |
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -vvV
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -bi1
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe"
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -t ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe.lz4"
+
+  meson:
+    name: Meson + Ninja
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Setup Python
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+      with:
+        python-version: '3.x'
+
+    - name: Install build tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install tree ninja-build
+        python -m pip install --upgrade pip
+        pip3 install --user meson
+
+    - name: Display environment info
+      run: |
+        type clang && which clang && clang --version
+        type python && which python && python --version
+        type meson && which meson && meson --version
+
+    - name: Configure build
+      run: >
+        meson setup
+        --fatal-meson-warnings
+        --buildtype=debug
+        -Db_lundef=false
+        -Dauto_features=enabled
+        -Dprograms=true
+        -Dcontrib=true
+        -Dtests=true
+        -Dexamples=true
+        build/meson builddir
+
+    - name: Run tests
+      run: meson test -C builddir
+
+    - name: Test installation
+      run: |
+        cd builddir
+        DESTDIR=./staging ninja install
+        tree ./staging

.github/workflows/ci.yml

@@ -1,817 +0,0 @@
-# For details, see README.md in this directory.
-
-###############################################################
-# C compilers
-#
-# - gcc
-# - clang
-#
-# Known Issue
-# - All test cases which described as 'fail' must be fixed and replaced with 'true'.
-#   - gcc-11 (x32, x86) : "../lib/lz4hc.c:148: LZ4HC_countBack: Assertion `(size_t)(match - mMin) < (1U<<31)' failed."
-#   - all clangs (x32, x86) : "../lib/lz4hc.c:282: int LZ4HC_InsertAndGetWiderMatch(...): Assertion `matchPtr >= lowPrefixPtr' failed."
-#
-name: lz4 CI
-on: [push, pull_request]
-permissions:
-  contents: read
-
-concurrency:
-  cancel-in-progress: true
-  group: ${{ github.workflow }}-${{ github.head_ref }}
-
-jobs:
-  lz4-c-compilers:
-    name: CC=${{ matrix.cc }}, ${{ matrix.os }}
-    strategy:
-      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix failed.
-      matrix:
-        include: [
-          # You can access the following values via ${{ matrix.??? }}
-          #
-          #   pkgs         : apt-get package names.  It can include multiple package names which are delimited by space.
-          #   cc           : C compiler executable.
-          #   cxx          : C++ compiler executable for `make ctocpptest`.
-          #   x32          : Set 'true' if compiler supports x32.  Otherwise, set 'false'.
-          #                  Set 'fail' if it supports x32 but fails for now.  'fail' cases must be removed.
-          #   x86          : Set 'true' if compiler supports x86 (-m32).  Otherwise, set 'false'.
-          #                  Set 'fail' if it supports x86 but fails for now.  'fail' cases must be removed.
-          #   cxxtest      : Set 'true' if it can be compiled as C++ code.  Otherwise, set 'false'.
-          #   freestanding : Set 'true' if it can be compiled and execute freestanding code.  Otherwise, set 'false'.
-          #                  Usually, it requires Linux, x86_64 and gcc/g++.
-          #   os           : GitHub Actions YAML workflow label.  See https://github.com/actions/virtual-environments#available-environments
-
-          # cc
-          { pkgs: '',                                                   cc: cc,        cxx: c++,         x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-latest, },
-
-          # gcc
-          { pkgs: '',                                                   cc: gcc,       cxx: g++,         x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-latest, },
-          { pkgs: 'gcc-13 g++-13 lib32gcc-13-dev libx32gcc-13-dev',     cc: gcc-13,    cxx: g++-13,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-12 g++-12 lib32gcc-12-dev libx32gcc-12-dev',     cc: gcc-12,    cxx: g++-12,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-11 g++-11 lib32gcc-11-dev libx32gcc-11-dev',     cc: gcc-11,    cxx: g++-11,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-10 g++-10 lib32gcc-10-dev libx32gcc-10-dev',     cc: gcc-10,    cxx: g++-10,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-9 g++-9 lib32gcc-9-dev libx32gcc-9-dev',         cc: gcc-9,     cxx: g++-9,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-8 g++-8 lib32gcc-8-dev libx32gcc-8-dev',         cc: gcc-8,     cxx: g++-8,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-20.04,  },
-          { pkgs: 'gcc-7 g++-7 lib32gcc-7-dev libx32gcc-7-dev',         cc: gcc-7,     cxx: g++-7,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-20.04,  },
-
-          # clang
-          { pkgs: 'lib32gcc-11-dev libx32gcc-11-dev',                   cc: clang,     cxx: clang++,     x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-latest, },
-          { pkgs: 'clang-15  lib32gcc-12-dev libx32gcc-12-dev',         cc: clang-15,  cxx: clang++-15,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-14  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-14,  cxx: clang++-14,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-13  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-13,  cxx: clang++-13,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-12  lib32gcc-12-dev libx32gcc-12-dev',         cc: clang-12,  cxx: clang++-12,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-11  lib32gcc-12-dev libx32gcc-12-dev',         cc: clang-11,  cxx: clang++-11,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-10  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-10,  cxx: clang++-10,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-9   lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-9,   cxx: clang++-9,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-8   lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-8,   cxx: clang++-8,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-7   lib32gcc-7-dev  libx32gcc-7-dev',          cc: clang-7,   cxx: clang++-7,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-6.0 lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-6.0, cxx: clang++-6.0, x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-        ]
-
-    runs-on: ${{ matrix.os }}
-    env:                        # Set environment variables
-      # We globally set CC and CXX to improve compatibility
-      CC: ${{ matrix.cc }}
-      CXX: ${{ matrix.cxx }}
-      FIXME__LZ4_CI_IGNORE : ' echo Error.  But we ignore it for now.'
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install ${{ matrix.pkgs }}
-
-    - name: Environment info
-      run: |
-        echo && type $CC && which $CC && $CC --version
-        echo && type $CXX && which $CXX && $CXX --version
-
-    - name: make
-      if: always()
-      run: make V=1
-
-    - name: install test
-      if: always()
-      run: make clean; make V=1 -C tests test-install
-
-    - name: make all
-      if: always()
-      run: make V=1 clean all
-
-    - name: make c_standards (C90)
-      if: always()
-      run: make V=1 clean c_standards_c90
-
-    - name: make c_standards (C11)
-      if: always()
-      run: make V=1 clean c_standards_c11
-
-    - name: make c-to-c++
-      if: always()
-      run: make V=1 clean ctocpptest
-
-    - name: make cxxtest
-      if: ${{ matrix.cxxtest == 'true' }}
-      run: make V=1 clean cxxtest
-
-    - name: make test-freestanding
-      if: ${{ matrix.freestanding == 'true' }}
-      run: make V=1 clean test-freestanding
-
-    - name: make -C programs default
-      if: always()
-      run: make V=1 -C programs clean default
-
-    - name: make -C programs default -D_FORTIFY_SOURCE=2
-      if: always()
-      run: CFLAGS='-fPIC' LDFLAGS='-pie -fPIE -D_FORTIFY_SOURCE=2' make V=1 -C programs clean default
-
-    - name: make -C tests test-lz4
-      if: always()
-      run: make clean; MOREFLAGS='-Werror' make -j V=1 -C tests test-lz4
-
-    - name: make clangtest (clang only)
-      if: ${{ startsWith( matrix.cc , 'clang' ) }}
-      run: make V=1 clean clangtest
-
-    - name: make -C tests test MOREFLAGS='-mx32'
-      if: ${{ matrix.x32 == 'true' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-mx32' make -j V=1 -C tests test
-
-    - name: make -C tests test-lz4c32
-      if: ${{ matrix.x86 == 'true' }}
-      run: LDFLAGS='-Wl,--verbose' MOREFLAGS='-Werror' make V=1 -C tests clean test-lz4c32
-
-
-    ###############################################################
-    #                                                             #
-    #      Remove this block when we stabilize the tests.         #
-    #                                                             #
-
-    - name: make -C tests test MOREFLAGS='-mx32' || echo Ignore failure for now.
-      if: ${{ matrix.x32 == 'fail' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-mx32' make -j V=1 -C tests test || $FIXME__LZ4_CI_IGNORE
-
-    - name: make -C tests test-lz4c32 || echo Ignore failure for now.
-      if: ${{ matrix.x86 == 'fail' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-Werror' make V=1 -C tests test-lz4c32 || $FIXME__LZ4_CI_IGNORE
-
-    #                                                             #
-    ###############################################################
-
-
-
-###############################################################
-# LZ4 self tests
-#
-# - Benchmark
-# - Fuzzer
-# - LZ4 Frame
-# - LZ4 versions
-# - Custom LZ4_DISTANCE_MAX
-#
-  lz4-benchmark:
-    name: Benchmark
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: benchmark (-C tests test-lz4)
-      run: make -j V=1 -C tests test-lz4
-
-    - name: benchmark (-C tests test-lz4c)
-      run: make -j V=1 -C tests test-lz4c
-
-    - name: benchmark (-C tests test-lz4c32)
-      run: make V=1 -C tests test-lz4c32
-
-    - name: benchmark (-C tests test-fullbench)
-      run: make V=1 -C tests test-fullbench
-
-    - name: benchmark (-C tests test-fullbench32)
-      run: make V=1 -C tests test-fullbench32
-
-
-  lz4-fuzzer:
-    name: Fuzzer test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: setup
-      run: sudo sysctl -w vm.mmap_min_addr=4096
-
-    - name: fuzzer
-      run: make V=1 -C tests test-fuzzer
-
-    - name: fuzzer32
-      run: make V=1 -C tests test-fuzzer32
-
-
-  lz4-standard-makefile-variables:
-    name: LZ4 Makefile - support for standard variables
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: make standard_variables
-      run: make V=1 standard_variables
-
-
-  lz4-versions:
-    name: LZ4 versions test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: make -C tests versionsTest
-      run: make V=1 -C tests versionsTest
-
-
-  lz4-abi:
-    name: LZ4 inter-versions ABI test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: make -C tests abiTests
-      run: make V=1 -C tests abiTests
-
-
-  lz4-frame:
-    name: LZ4 frame test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: LZ4 frame test
-      run: make V=1 -C tests test-frametest
-
-    - name: LZ4 frame test (32-bit)
-      run: make V=1 -C tests test-frametest32
-
-  lz4-memory-usage:
-    name: test different values of LZ4_MEMORY_USAGE
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: LZ4_MEMORY_USAGE
-      run: make V=1 -C tests test-compile-with-lz4-memory-usage
-
-  # Custom LZ4_DISTANCE_MAX ; lz4-wlib (CLI linked to dynamic library); LZ4_USER_MEMORY_FUNCTIONS
-  lz4-custom-distance:
-    name: Custom LZ4_DISTANCE_MAX
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: custom LZ4_DISTANCE_MAX; test LZ4_USER_MEMORY_FUNCTIONS
-      run: |
-        MOREFLAGS='-DLZ4_DISTANCE_MAX=8000' make V=1 check
-        make V=1 clean
-        make V=1 -C programs lz4-wlib
-        make V=1 clean
-        make V=1 -C tests fullbench-wmalloc  # test LZ4_USER_MEMORY_FUNCTIONS
-        make V=1 clean
-        CC="c++ -Wno-deprecated" make V=1 -C tests fullbench-wmalloc  # stricter function signature check
-
-  # test block device compression #1086
-  lz4cli-block-device:
-    name: Test lz4 compression on a block device
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: create a block device, compress it with lz4 # alternative : blindly use /dev/loop0, seems to always exist
-      run: |
-        make lz4
-        dd if=/dev/zero of=full0.img bs=2M count=1
-        BLOCK_DEVICE=$(sudo losetup --show -fP full0.img)
-        sudo chmod 666 $BLOCK_DEVICE
-        ./lz4 -v $BLOCK_DEVICE -c > /dev/null
-        sudo losetup -d $BLOCK_DEVICE
-        rm full0.img
-
-
-###############################################################
-# Check tools
-#
-# - cppcheck
-# - scan-build
-# - valgrind
-# - ubsan
-# - asan
-# - unicode-lint
-# - build examples
-#
-  lz4-cppcheck:
-    name: make cppcheck
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install cppcheck
-
-    - name: Environment info
-      run: echo && type cppcheck && which cppcheck && cppcheck --version
-
-    - name: cppcheck
-      # This test script ignores the exit code of cppcheck.
-      # See known issues in README.md.
-      run: make V=1 clean cppcheck || echo There are some cppcheck reports but we ignore it.
-
-
-  lz4-scan-build:
-    name: make staticAnalyze
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install clang-tools
-
-    - name: Environment info
-      run: |
-        echo && type gcc && which gcc && gcc --version
-        echo && type clang && which clang && clang --version
-        echo && type scan-build && which scan-build               # scan-build doesn't have any --version equivalent option
-        echo && type make && which make && make -v
-        echo && cat /proc/cpuinfo || echo /proc/cpuinfo is not present
-
-    - name: make staticAnalyze
-      run: make V=1 clean staticAnalyze
-
-
-  lz4-valgrind:
-    name: valgrind
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install valgrind
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type valgrind && which valgrind && valgrind --version
-
-    - name: valgrind
-      run: make V=1 -C tests test-mem
-
-
-  lz4-ubsan-x64:
-    name: Linux x64 ubsan
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: ubsan
-      run: |
-        make clean
-        make V=1 usan
-
-
-  lz4-ubsan-x86:
-    name: Linux x86 ubsan
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install lib32gcc-11-dev
-
-    - name: ubsan32
-      run: |
-        make clean
-        CC=clang make V=1 usan32
-
-
-  lz4-asan-x64:
-    name: Linux x64 ASAN
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: setup
-      run: sudo sysctl -w vm.mmap_min_addr=4096
-
-    - name: frametest
-      run: CC=clang MOREFLAGS=-fsanitize=address make V=1 -C tests clean test-frametest
-
-    - name: fuzzer
-      run: CC=clang MOREFLAGS=-fsanitize=address make V=1 -C tests clean test-fuzzer
-
-  unicode-lint:
-    name: lint unicode in ./lib/, ./tests/ and ./programs/
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: unicode lint
-      run: bash ./tests/unicode_lint.sh
-
-  lz4-examples:
-    name: make examples
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type c++ && which c++ && c++ --version
-
-    - name: examples
-      run: make V=1 clean examples
-
-    - name: examples (compile as C++ code)
-      run: make V=1 -C examples clean cxxtest
-
-  # lasts ~20mn
-  oss-fuzz:
-    runs-on: ubuntu-latest
-    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: 'lz4'
-        dry-run: false
-        sanitizer: ${{ matrix.sanitizer }}
-    - name: Run Fuzzers (${{ matrix.sanitizer }})
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-      with:
-        oss-fuzz-project-name: 'lz4'
-        fuzz-seconds: 600
-        dry-run: false
-        sanitizer: ${{ matrix.sanitizer }}
-    - name: Upload Crash
-      uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # https://github.com/actions/upload-artifact v3.1.3
-      if: failure() && steps.build.outcome == 'success'
-      with:
-        name: ${{ matrix.sanitizer }}-artifacts
-        path: ./out/artifacts
-
-
-
-###############################################################
-# Platforms
-#
-# - QEMU (ARM, ARM64, PPC, PPC64LE, S390X)
-# - macOS
-# - Windows
-#
-
-  # QEMU
-  # All tests use QEMU (static) and gcc cross compiler.
-  #
-  # note:
-  #   We don't employ completely matrix method which provides `MOREFLAGS`
-  #   etc in the matrix.  Because some platform may need its special
-  #   compiler options and test.
-  #   For example, xxHash already has tests for scalar and SIMD version of
-  #   it.  But compiler options are quite different between platforms.
-  #
-  #   So, please keep them simple and independent.
-  #
-  lz4-qemu-platforms:
-    name: QEMU ${{ matrix.type }}
-    strategy:
-      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix instance failed.
-      matrix:
-        include: [
-          # You can access the following values via ${{ matrix.??? }}
-          #   type : Architecture type for `if:` statement.
-          #   pkgs : apt-get package names.  You can include multiple packages which are delimited by space.
-          #   xcc  : gcc cross C compiler executable.
-          #   xemu : QEMU static emulator executable.
-          #   os   : GitHub Actions YAML workflow label.  See https://github.com/actions/virtual-environments#available-environments
-
-          { type: ARM,      pkgs: 'qemu-system-arm   gcc-arm-linux-gnueabi',     xcc: arm-linux-gnueabi-gcc,     xemu: qemu-arm-static,     os: ubuntu-latest, },
-          { type: ARM64,    pkgs: 'qemu-system-arm   gcc-aarch64-linux-gnu',     xcc: aarch64-linux-gnu-gcc,     xemu: qemu-aarch64-static, os: ubuntu-latest, },
-          { type: PPC,      pkgs: 'qemu-system-ppc   gcc-powerpc-linux-gnu',     xcc: powerpc-linux-gnu-gcc,     xemu: qemu-ppc-static,     os: ubuntu-latest, },
-          { type: PPC64LE,  pkgs: 'qemu-system-ppc   gcc-powerpc64le-linux-gnu', xcc: powerpc64le-linux-gnu-gcc, xemu: qemu-ppc64le-static, os: ubuntu-latest, },
-          { type: S390X,    pkgs: 'qemu-system-s390x gcc-s390x-linux-gnu',       xcc: s390x-linux-gnu-gcc,       xemu: qemu-s390x-static,   os: ubuntu-latest, },
-        ]
-
-    runs-on: ${{ matrix.os }}
-    env:                        # Set environment variables
-      XCC: ${{ matrix.xcc }}
-      XEMU: ${{ matrix.xemu }}
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install qemu-utils qemu-user-static
-        sudo apt-get install ${{ matrix.pkgs }}
-
-    - name: Environment info
-      run: |
-        echo && type $XCC && which $XCC && $XCC --version
-        echo && $XCC -v                       # Show built-in specs
-        echo && type $XEMU && which $XEMU && $XEMU --version
-
-    - name: ARM64
-      if: ${{ matrix.type == 'ARM64' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: ARM
-      if: ${{ matrix.type == 'ARM' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: PPC
-      if: ${{ matrix.type == 'PPC' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: PPC64LE
-      if: ${{ matrix.type == 'PPC64LE' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU MOREFLAGS=-m64
-
-    - name: S390X
-      if: ${{ matrix.type == 'S390X' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-
-  # macOS
-  lz4-platform-macos-latest:
-    name: macOS
-    runs-on: macos-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type make && which make && make -v
-        echo && sysctl -a | grep machdep.cpu   # cpuinfo
-
-    - name: make default
-      run: CFLAGS="-Werror" make V=1 clean default
-
-    - name: make test
-      run: make clean; make -j V=1 test MOREFLAGS='-Werror -Wconversion -Wno-sign-conversion'
-
-    - name: Ensure `make test` doesn't depend on the status of the console
-      # see issue #990 for detailed explanations
-      run: make -j test > /dev/null
-
-
-  # Windows
-  lz4-platform-windows:
-    name: ${{ matrix.system.os }}
-    runs-on: ${{ matrix.system.os }}
-    strategy:
-      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix failed.
-      matrix:
-        system: [
-          { os: windows-2022, build_path: ".\\build\\VS2022" },
-        ]
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: Build ${{ matrix.system.os }}, Win32
-      run: |
-        pushd ${{ matrix.system.build_path }}
-        .\\build-and-test-win32-release.bat
-        popd
-
-    - name: Build ${{ matrix.system.os }}, x64
-      run: |
-        pushd ${{ matrix.system.build_path }}
-        .\\build-and-test-x64-release.bat
-        popd
-
-
-###############################################################
-# Build systems
-#
-# - make
-# - cmake
-# - meson
-#
-
-  # make
-  lz4-build-make:
-    name: make
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type make && which make && make -v
-
-    - name: make
-      run: make V=1
-
-
-  lz4-build-make-test-install:
-    name: make test-install
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: test-install
-      run: make V=1 clean test-install
-
-    - name: test-install result
-      run: |
-        echo && echo Installed files
-        ( cd ~/install_test_dir; find .; )
-
-
-  # cmake
-  lz4-build-cmake:
-    name: cmake
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: Environment info
-      run: |
-        echo && type cmake && which cmake && cmake --version
-        echo && type make && which make && make -v
-
-    - name: cmake
-      run: |
-        CFLAGS=-Werror cmake -S build/cmake -B build -D CMAKE_INSTALL_PREFIX=install
-        VERBOSE=1 cmake --build build --target install
-        cmake -S tests/cmake -B build_test -D CMAKE_INSTALL_PREFIX=install
-        VERBOSE=1 cmake --build build_test
-
-  # Invoke cmake via Makefile
-  lz4-build-make-cmake:
-    name: make cmake
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: make cmake
-      # V=1 for lz4 Makefile, VERBOSE=1 for cmake Makefile.
-      run: make V=1 VERBOSE=1 clean cmake
-
-
-  # Meson
-  lz4-build-meson:
-    name: Meson + Ninja
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # https://github.com/actions/setup-python v4.7.0 
-      with:
-        python-version: '3.x'
-
-    - name: Install
-      run: |
-        sudo apt-get update
-        sudo apt-get install tree ninja-build
-        python -m pip install --upgrade pip
-        pip3 install --user meson
-
-    - name: Environment info
-      run: |
-        echo && type clang && which clang && clang --version
-        echo && type python && which python && python --version
-        echo && type meson && which meson && meson --version
-
-    - name: setup
-      # 'run: >' replaces all newlines in the following block with spaces
-      run: >
-        meson setup
-        --fatal-meson-warnings
-        --buildtype=debug
-        -Db_lundef=false
-        -Dauto_features=enabled
-        -Dprograms=true
-        -Dcontrib=true
-        -Dtests=true
-        -Dexamples=true
-        build/meson builddir
-
-    - name: test
-      run: |
-        meson test -C builddir
-
-    - name: staging
-      run: |
-        cd builddir
-        DESTDIR=./staging ninja install
-        tree ./staging
-
-
-
-############################################################
-# Check git tag for LZ4 releases
-#
-  lz4-check-tag:
-    name: git version tag checking for release
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-    - name: make -C tests checkTag
-      if: startsWith(github.ref, 'refs/tags/v')   # If git tag name starts with 'v'
-      run: |
-        echo "tag=${GITHUB_REF#refs/*/}"
-        make -C tests checkTag
-        tests/checkTag ${GITHUB_REF#refs/*/}
-
-
-
-############################################################
-# Gather CI environment information.
-#
-  lz4-env-info:
-    name: GH-Actions Virtual Env Info (${{ matrix.os }})
-    strategy:
-      matrix:
-        include: [
-          { os: ubuntu-latest,  }, # https://github.com/actions/virtual-environments/
-          { os: ubuntu-22.04,   }, # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2204-Readme.md
-          { os: ubuntu-20.04,   }, # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-Readme.md
-        ]
-
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # https://github.com/actions/checkout v4.0.0
-
-    - name: init
-      run: |
-        sudo apt-get update
-
-    - name: cc --version
-      run: echo && type cc && which cc && cc --version
-
-    - name: gcc --version
-      run: echo && type gcc && which gcc && gcc --version
-
-    - name: clang --version
-      run: echo && type clang && which clang && clang --version
-
-    - name: make -v
-      run: echo && type make && which make && make -v
-
-    - name: g++ --version
-      run: echo && type g++ && which g++ && g++ --version
-
-    - name: git --version
-      run: echo && type git && which git && git --version
-
-    - name: gcc packages (apt-cache)
-      run: apt-cache search gcc | grep "^gcc-[0-9\.]* " | sort
-
-    - name: lib32gcc packages for i386 (apt-cache)
-      run: apt-cache search lib32gcc | grep "^lib32gcc-" | sort
-
-    - name: libx32gcc packages for x32 (apt-cache)
-      run: apt-cache search libx32gcc | grep "^libx32gcc-" | sort
-
-    - name: gcc multilib packages (apt-cache)
-      run: apt-cache search multilib | grep "gcc-" | sort
-
-    - name: clang packages (apt-cache)
-      run: apt-cache search clang | grep "^clang-[0-9\.]* " | sort
-
-    - name: QEMU packages (apt-cache)
-      run: apt-cache search qemu | grep "^qemu-system-.*QEMU full system" | sort

.github/workflows/cmake-test.yml

@@ -0,0 +1,127 @@
+# Simplified CMake Build Tests
+name: CMake Build Tests
+
+on:
+  push:
+    branches: ['dev', 'release', '*cmake*']
+  pull_request:
+    branches: ['dev', 'release']
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  # Core functionality test - multi-platform
+  cmake-core-tests:
+    name: Core Tests (${{ matrix.os }}, ${{ matrix.build_type }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            build_type: Release
+            generator: ""
+          - os: ubuntu-latest
+            build_type: Debug
+            generator: ""
+          - os: windows-latest
+            build_type: Release
+            generator: '-G "Visual Studio 17 2022" -A x64'
+          - os: macos-latest
+            build_type: Release
+            generator: ""
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+
+    - name: Set up MSVC (Windows)
+      if: runner.os == 'Windows'
+      uses: microsoft/setup-msbuild@v3
+
+    - name: Set up CMake
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: latest
+
+    - name: Configure and Build
+      shell: bash
+      run: |
+        mkdir cmakebuild && cd cmakebuild
+        cmake ../build/cmake ${{ matrix.generator }} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+        cmake --build . --config ${{ matrix.build_type }}
+
+    - name: Test Installation (Linux only)
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        cd cmakebuild
+        cmake --install . --prefix install-test
+        test -f "install-test/lib/liblz4.a" || test -f "install-test/lib/liblz4.so"
+        test -f "install-test/include/lz4.h"
+
+  # CMake compatibility and integration tests
+  cmake-extended-tests:
+    name: Extended Tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        test_type: 
+          - cmake_versions
+          - static_lib
+          - integration
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+
+    - name: Set up CMake
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: ${{ matrix.test_type == 'cmake_versions' && '3.10.0' || 'latest' }}
+
+    - name: CMake Version Compatibility Test
+      if: matrix.test_type == 'cmake_versions'
+      run: |
+        mkdir cmakebuild && cd cmakebuild
+        cmake ../build/cmake
+        cmake --build .
+
+    - name: Static Library Test
+      if: matrix.test_type == 'static_lib'
+      run: |
+        # Build and install static library
+        CFLAGS="-Werror -O1" cmake -S build/cmake -B build -DBUILD_STATIC_LIBS=ON -DCMAKE_INSTALL_PREFIX=$PWD/install
+        cmake --build build --target install
+        
+        # Test find_package with static library
+        cmake -S tests/cmake -B build_test -DCMAKE_PREFIX_PATH=$PWD/install
+        cmake --build build_test
+
+    - name: Integration Test
+      if: matrix.test_type == 'integration'
+      run: |
+        # Build and install
+        cmake -S build/cmake -B build -DCMAKE_INSTALL_PREFIX=$PWD/install
+        cmake --build build --target install
+        
+        # Test find_package
+        cmake -S tests/cmake -B test_build -DCMAKE_PREFIX_PATH=$PWD/install
+        cmake --build test_build
+        cd test_build && ctest -V
+
+  # Makefile wrapper test
+  make-cmake-test:
+    name: Make CMake
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+    - name: Test via Makefile
+      run: make clean && make cmakebuild

.github/workflows/code-quality.yml

@@ -0,0 +1,105 @@
+# Static analysis and code quality checks
+name: Code Quality
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  cppcheck:
+    name: Cppcheck Static Analysis
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install cppcheck
+      run: |
+        sudo apt-get update
+        sudo apt-get install cppcheck
+
+    - name: Display cppcheck version
+      run: |
+        type cppcheck && which cppcheck && cppcheck --version
+
+    - name: Run cppcheck analysis
+      # This test script ignores the exit code of cppcheck.
+      # See known issues in README.md.
+      run: make V=1 clean cppcheck || echo "There are some cppcheck reports but we ignore them for now."
+
+  scan-build:
+    name: Clang Static Analyzer
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install clang-tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install clang-tools
+
+    - name: Display environment info
+      run: |
+        type gcc && which gcc && gcc --version
+        type clang && which clang && clang --version
+        type scan-build && which scan-build
+        type make && which make && make -v
+        cat /proc/cpuinfo || echo "/proc/cpuinfo is not present"
+
+    - name: Run static analysis
+      run: make V=1 clean staticAnalyze
+
+  valgrind:
+    name: Valgrind Memory Analysis
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install valgrind
+      run: |
+        sudo apt-get update
+        sudo apt-get install valgrind
+
+    - name: Display environment info
+      run: |
+        type cc && which cc && cc --version
+        type valgrind && which valgrind && valgrind --version
+
+    - name: Run memory analysis
+      run: make V=1 -C tests test-mem
+
+  unicode-lint:
+    name: Unicode Linting
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Check for unicode issues
+      run: bash ./tests/unicode_lint.sh
+
+  examples:
+    name: Build Examples
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: sudo apt-get update
+
+    - name: Display compiler info
+      run: |
+        type cc && which cc && cc --version
+        type c++ && which c++ && c++ --version
+
+    - name: Build examples
+      run: make V=1 examples

.github/workflows/compilers.yml

@@ -0,0 +1,112 @@
+# Compiler compatibility testing across multiple C compilers
+name: Compiler Tests
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  compiler-matrix:
+    name: ${{ matrix.cc }} on ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # System default compilers
+          - { pkgs: '', cc: cc, cxx: c++, x86: true, cxxtest: true, freestanding: true, os: ubuntu-latest }
+          - { pkgs: '', cc: gcc, cxx: g++, x86: true, cxxtest: true, freestanding: true, os: ubuntu-latest }
+          
+          # GCC versions - latest stable and LTS
+          - { pkgs: 'gcc-14 g++-14 lib32gcc-14-dev', cc: gcc-14, cxx: g++-14, x86: true, cxxtest: true, freestanding: true, os: ubuntu-24.04 }
+          - { pkgs: 'gcc-11 g++-11 lib32gcc-11-dev', cc: gcc-11, cxx: g++-11, x86: true, cxxtest: true, freestanding: true, os: ubuntu-22.04 }
+          
+          # Clang versions - system default, latest stable, and older stable
+          - { pkgs: 'lib32gcc-12-dev', cc: clang, cxx: clang++, x86: true, cxxtest: true, freestanding: false, os: ubuntu-latest }
+          - { pkgs: 'clang-18 lib32gcc-12-dev', cc: clang-18, cxx: clang++-18, x86: true, cxxtest: true, freestanding: false, os: ubuntu-24.04 }
+          - { pkgs: 'clang-14 lib32gcc-12-dev', cc: clang-14, cxx: clang++-14, x86: true, cxxtest: true, freestanding: false, os: ubuntu-22.04 }
+
+    runs-on: ${{ matrix.os }}
+    env:
+      CC: ${{ matrix.cc }}
+      CXX: ${{ matrix.cxx }}
+      FIXME__LZ4_CI_IGNORE: ' echo Error. But we ignore it for now.'
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+        if [ "${{ matrix.pkgs }}" != "" ]; then
+          sudo apt-get install ${{ matrix.pkgs }}
+        fi
+
+    - name: Display environment info
+      run: |
+        echo "=== Compiler Information ==="
+        type $CC && which $CC && $CC --version
+        echo "=== C++ Compiler Information ==="
+        type $CXX && which $CXX && $CXX --version
+
+    - name: Basic build test
+      run: make -j V=1
+
+    - name: Installation test
+      run: make -C tests test-install V=1
+
+    - name: Build all with strict flags
+      run: |
+        make clean
+        CFLAGS="-Werror -O0" make -j all V=1
+
+    - name: C90 standard compliance test
+      run: |
+        make clean
+        make -j c_standards_c90 V=1
+
+    - name: C11 standard compliance test
+      run: |
+        make clean
+        make -j c_standards_c11 V=1
+
+    - name: C library for C++ program test
+      if: ${{ matrix.cxxtest }}
+      run: |
+        make clean
+        make -j ctocxxtest V=1
+
+    - name: C++ compilation test
+      if: ${{ matrix.cxxtest }}
+      run: |
+        make clean
+        make -j cxxtest V=1
+
+    - name: Freestanding environment test
+      if: ${{ matrix.freestanding }}
+      run: |
+        make clean
+        make test-freestanding V=1
+
+    - name: Fortified build test
+      run: |
+        make clean
+        CFLAGS='-fPIC' LDFLAGS='-pie -fPIE -D_FORTIFY_SOURCE=2' make -j -C programs default V=1
+
+    - name: Core functionality test
+      run: |
+        make clean
+        CPPFLAGS=-DLZ4IO_NO_TSAN_ONLY make -j V=1 -C tests test-lz4
+
+    - name: 32-bit compatibility test
+      if: ${{ matrix.x86 }}
+      run: |
+        make clean
+        CFLAGS='-Werror -O1' make -j -C tests test-lz4c32 V=1

.github/workflows/core-tests.yml

@@ -0,0 +1,163 @@
+# Core LZ4 functionality testing
+name: Core Tests
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  benchmark:
+    name: Benchmark Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Basic compression test
+      run: make -j -C tests test-lz4c V=1
+
+    - name: Full benchmark test
+      run: make -j -C tests test-fullbench V=1
+
+    - name: 32-bit benchmark test
+      run: make -j -C tests test-fullbench32 V=1
+
+  fuzzer:
+    name: Fuzzer Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Setup memory mapping
+      run: sudo sysctl -w vm.mmap_min_addr=4096
+
+    - name: Fuzzer test (64-bit)
+      run: make -j -C tests test-fuzzer V=1
+
+    - name: Fuzzer test (32-bit)
+      run: make -C tests test-fuzzer32 V=1
+
+  versions:
+    name: Version Compatibility Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Version compatibility test
+      run: make -j -C tests versionsTest V=1
+
+  abi:
+    name: ABI Compatibility Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: ABI compatibility test
+      run: make -j -C tests abiTests V=1
+
+  frame:
+    name: LZ4 Frame Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Frame format test (64-bit)
+      run: make -j -C tests test-frametest V=1
+
+    - name: Frame format test (32-bit)
+      run: make -j -C tests test-frametest32 V=1
+
+  memory-usage:
+    name: Memory Usage Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test different LZ4_MEMORY_USAGE values
+      run: make V=1 -C tests test-compile-with-lz4-memory-usage
+
+  custom-distance:
+    name: Custom Configuration Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Custom LZ4_DISTANCE_MAX test
+      run: |
+        CPPFLAGS='-DLZ4_DISTANCE_MAX=8000' make V=1 check
+        make clean
+
+    - name: Dynamic library linking test
+      run: |
+        make -C programs lz4-wlib V=1
+        make clean
+
+    - name: User memory functions test
+      run: |
+        make -C tests fullbench-wmalloc V=1
+        make clean
+        CC="c++ -Wno-deprecated" make -C tests fullbench-wmalloc V=1
+
+  makefile-variables:
+    name: Makefile Standard Variables Test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test standard variable propagation
+      run: make test_stdvars V=1
+
+  block-device:
+    name: Block Device Compression Test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test block device compression
+      run: |
+        make lz4
+        dd if=/dev/zero of=full0.img bs=2M count=1
+        BLOCK_DEVICE=$(sudo losetup --show -fP full0.img)
+        sudo chmod 666 $BLOCK_DEVICE
+        ./lz4 -v $BLOCK_DEVICE -c > /dev/null
+        sudo losetup -d $BLOCK_DEVICE
+        rm full0.img

.github/workflows/cross-platform.yml

@@ -0,0 +1,93 @@
+# Cross-platform testing using QEMU emulation
+name: Cross Platform
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  qemu-platforms:
+    name: ${{ matrix.arch }} (QEMU)
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: ARM,      pkgs: 'qemu-system-arm   gcc-arm-linux-gnueabi',     xcc: arm-linux-gnueabi-gcc,     xemu: qemu-arm-static,     makevar: "" }
+          - { arch: ARM64,    pkgs: 'qemu-system-arm   gcc-aarch64-linux-gnu',     xcc: aarch64-linux-gnu-gcc,     xemu: qemu-aarch64-static, makevar: "" }
+          - { arch: PPC,      pkgs: 'qemu-system-ppc   gcc-powerpc-linux-gnu',     xcc: powerpc-linux-gnu-gcc,     xemu: qemu-ppc-static,     makevar: "" }
+          - { arch: PPC64LE,  pkgs: 'qemu-system-ppc   gcc-powerpc64le-linux-gnu', xcc: powerpc64le-linux-gnu-gcc, xemu: qemu-ppc64le-static, makevar: "" }
+          - { arch: S390X,    pkgs: 'qemu-system-s390x gcc-s390x-linux-gnu',       xcc: s390x-linux-gnu-gcc,       xemu: qemu-s390x-static,   makevar: "" }
+          - { arch: MIPS,     pkgs: 'qemu-system-mips gcc-mips-linux-gnu',         xcc: mips-linux-gnu-gcc,        xemu: qemu-mips-static,    makevar: "" }
+          - { arch: M68K,     pkgs: 'qemu-system-m68k gcc-m68k-linux-gnu',         xcc: m68k-linux-gnu-gcc,        xemu: qemu-m68k-static,    makevar: "HAVE_MULTITHREAD=0" }
+          - { arch: RISC-V,   pkgs: 'qemu-system-riscv64 gcc-riscv64-linux-gnu',   xcc: riscv64-linux-gnu-gcc,     xemu: qemu-riscv64-static, makevar: "" }
+          - { arch: SPARC,    pkgs: 'qemu-system-sparc gcc-sparc64-linux-gnu',     xcc: sparc64-linux-gnu-gcc,     xemu: qemu-sparc64-static, makevar: "" }
+
+    runs-on: ubuntu-latest
+    env:
+      XCC: ${{ matrix.xcc }}
+      XEMU: ${{ matrix.xemu }}
+      MAKEVAR: ${{ matrix.makevar }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install cross-compilation tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib qemu-utils qemu-user-static
+        sudo apt-get install ${{ matrix.pkgs }}
+
+    - name: Display environment info
+      run: |
+        echo "=== Cross Compiler Information ==="
+        type $XCC && which $XCC && $XCC --version
+        $XCC -v  # Show built-in specs
+        echo "=== QEMU Emulator Information ==="
+        type $XEMU && which $XEMU && $XEMU --version
+
+    - name: Run platform tests (ARM/ARM64/PPC/S390X)
+      if: contains(fromJSON('["ARM", "ARM64", "PPC", "S390X"]'), matrix.arch)
+      run: make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU
+
+    - name: Run platform tests (PPC64LE)
+      if: matrix.arch == 'PPC64LE'
+      run: CFLAGS=-m64 make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU
+
+    - name: Run platform tests (MIPS/M68K/RISC-V/SPARC)
+      if: contains(fromJSON('["MIPS", "M68K", "RISC-V", "SPARC"]'), matrix.arch)
+      run: make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU $MAKEVAR
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Display environment info
+      run: |
+        type cc && which cc && cc --version
+        type make && which make && make -v
+        sysctl -a | grep machdep.cpu  # CPU info
+
+    - name: Build with strict flags
+      run: |
+        make clean
+        CFLAGS="-Werror -O0" make default V=1
+
+    - name: Run comprehensive tests
+      run: |
+        make clean
+        CFLAGS="-O3 -Werror -Wconversion -Wno-sign-conversion" make -j test V=1
+
+    - name: Test console independence
+      # Ensure `make test` doesn't depend on the status of the console
+      # See issue #990 for detailed explanations
+      run: make -j test > /dev/null

.github/workflows/oss-fuzz.yml

@@ -0,0 +1,45 @@
+# OSS-Fuzz integration testing
+name: OSS-Fuzz
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  oss-fuzz:
+    name: OSS-Fuzz (${{ matrix.sanitizer }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined, memory]
+
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        fuzz-seconds: 100
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Upload Crash Artifacts
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: ${{ matrix.sanitizer }}-artifacts
+        path: ./out/artifacts

.github/workflows/release-environment.yml

@@ -0,0 +1,69 @@
+# Release and environment testing
+name: Release & Environment
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  check-git-tag:
+    name: Git Version Tag Check
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Validate release tag
+      if: startsWith(github.ref, 'refs/tags/v')
+      run: |
+        echo "tag=${GITHUB_REF#refs/*/}"
+        make -C tests checkTag
+        tests/checkTag ${GITHUB_REF#refs/*/}
+
+  environment-info:
+    name: Environment Info (${{ matrix.os }})
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-24.04, ubuntu-22.04]
+
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Update package list
+      run: sudo apt-get update
+
+    - name: Display compiler versions
+      run: |
+        echo "=== Default C Compiler ==="
+        type cc && which cc && cc --version
+        echo "=== GCC ==="
+        type gcc && which gcc && gcc --version
+        echo "=== Clang ==="
+        type clang && which clang && clang --version
+        echo "=== Make ==="
+        type make && which make && make -v
+        echo "=== G++ ==="
+        type g++ && which g++ && g++ --version
+        echo "=== Git ==="
+        type git && which git && git --version
+
+    - name: List available package versions
+      run: |
+        echo "=== Available GCC Packages ==="
+        apt-cache search gcc | grep "^gcc-[0-9\.]* " | sort
+        echo "=== Available lib32gcc Packages (i386) ==="
+        apt-cache search lib32gcc | grep "^lib32gcc-" | sort
+        echo "=== Available GCC Multilib Packages ==="
+        apt-cache search multilib | grep "gcc-" | sort
+        echo "=== Available Clang Packages ==="
+        apt-cache search clang | grep "^clang-[0-9\.]* " | sort
+        echo "=== Available QEMU Packages ==="
+        apt-cache search qemu | grep "^qemu-system-.*QEMU full system" | sort

.github/workflows/sanitizers.yml

@@ -0,0 +1,99 @@
+# Sanitizer testing (AddressSanitizer, MemorySanitizer, etc.)
+name: Sanitizers
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  ubsan-x64:
+    name: UndefinedBehaviorSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Run UBSan tests
+      run: make ubsan V=1
+
+  ubsan-x86:
+    name: UndefinedBehaviorSanitizer (x86)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install 32-bit dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib lib32gcc-11-dev
+
+    - name: Run UBSan tests (32-bit)
+      run: |
+        make clean
+        CC=clang make V=1 usan32
+
+  asan-x64:
+    name: AddressSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Setup memory mapping
+      run: sudo sysctl -w vm.mmap_min_addr=4096
+
+    - name: ASan - basic check
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j check V=1
+
+    - name: ASan - frame test
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j -C tests test-frametest V=1
+
+    - name: ASan - fuzzer test
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j -C tests test-fuzzer V=1
+
+  msan-x64:
+    name: MemorySanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: MSan - basic check
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j check V=1
+
+    - name: MSan - frame test
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j -C tests test-frametest V=1
+
+    - name: MSan - fuzzer test
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j -C tests test-fuzzer V=1
+
+  tsan-x64:
+    name: ThreadSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: TSan - CLI test
+      run: |
+        make clean
+        CC=clang CPPFLAGS="-fsanitize=thread" make -j -C tests test-lz4 V=1

.github/workflows/scorecard.yml

@@ -0,0 +1,65 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '23 22 * * 3'
+  push:
+    branches: [ "dev" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@62b2cac7ed8198b15735ed49ab1e5cf35480ba46 # v2.4.0
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # you want to enable the Branch-Protection check on a *public* repository
+          # To create the PAT, follow the steps in
+          # https://github.com/ossf/scorecard-action#authentication-with-fine-grained-pat-optional
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # - Publish results to OpenSSF REST API for easy access by consumers
+          # - Allows the repository to include the Scorecard badge.
+          # - See https://github.com/ossf/scorecard-action#publishing-results.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
+        with:
+          sarif_file: results.sarif

.gitignore

@@ -1,6 +1,8 @@
 # Object files
 *.o
 *.ko
+obj/
+cacheObjs/
 
 # Libraries
 *.lib
@@ -19,14 +21,23 @@
 *.app
 lz4
 
+# Builders
+cmakebuild/
+builddir/
+cachedObjs/
+
 # IDE / editors files
 .clang_complete
+.vscode
 _codelite/
 _codelite_lz4/
 bin/
 *.zip
 *.swp
 compile_flags.txt
+compile_commands.json
+.vscode
+.cache
 
 # analyzers
 infer-out
@@ -42,6 +53,11 @@ ld.exe*
 # test artifacts
 *.lz4
 tmp*
+.stdvars.log
+cmake_download/
+cmake_bins/
+cmake_build/
+cmake_install_test/
 
 # generated Windows resource files
 lib/*.rc

CODING_STYLE

@@ -0,0 +1,57 @@
+LZ4 CODING STYLE
+================
+
+When contributing code and patches to the `LZ4` project, the following rules are expected to be followed for a successful merge.
+
+
+Library
+-------
+
+The library's source code in `lib/` directory has a BSD 2-clause license.
+It's designed to be integrated into 3rd party applications.
+
+It adheres relatively strictly to vanilla `C90`, with the following exceptions:
+- `long long` type is required, in order to support 64-bit values
+- Variadic Macros are used for debug mode (but not required in release mode)
+
+Beyond that, all other rules and limitations of C90 must be respected, including `/* ... */` comment style only, and variable declaration at top of block only. The automated CI test suite will check for these rules.
+
+The code is allowed to use more modern variants (C99 / C11 / C23) when useful
+as long as it provides a clean C90 backup for older compilers.
+For example, C99+ compilers will employ the `restrict` keyword, while `C90` ones will ignore it, thanks to conditional macros.
+This ensures maximum portability across a wide range of systems.
+
+Moreover, in the interest of safety, the code has to respect a fairly strigent list of additional restrictions, provided through warning flags, the list of which is maintained within `Makefile`.
+Among the less common ones, we want the source to be compatible with `-Wc++-compat`, which ensures that the code can be compiled "as is", with no modification, as C++ code. It makes it possible to copy-paste the code into other C++ source files, or the source files are just dropped into a C++ environment which then compiles them as C++ source files.
+
+
+Command Line Interface
+----------------------
+
+The CLI executable's source code in `programs/` directory has a GPLv2+ license.
+While it's designed to be portable and freely distributable, it's not meant to be integrated into 3rd party applications.
+The license difference is meant to reflect that choice.
+
+Similar to the library, the CLI adheres relatively strictly to vanilla `C90`, and features the same exceptions:
+- `long long` requirement for 64-bit values
+- Variadic Macros for console messages (now used all the time, not just debug mode)
+
+The code can also use system-specific libraries and symbols (such as `posix` ones)
+as long as it provides a backup for plain `C90` platforms.
+It's even allowed to lose capabilities, as long as the CLI can be cleanly compiled on `C90`.
+For example, systems without `<pthread>` support nor Completion Ports will just not feature multi-threading support, and run single threaded.
+
+In the interest of build familiarity, the CLI source code also respects the same set of advanced warning flags as the library.
+That being said, this last part is debatable and could deviate in the future.
+For example, there are less reasons to support `-Wc++-compat` on the CLI side, since it's not meant to be integrated into 3rd party applications.
+
+
+Others
+------
+
+The repository includes other directories with their own set of compilable projects, such as `tests/`, `examples/` and `contrib/`.
+
+These repositories do not have to respect the same set of restrictions, and can employ a larger array of different languages.
+For example, some tests employ `sh`, and others employ `python`.
+
+These directories may nonetheless include several targets employing the same coding convention as the `lz4` library. This is in a no way a rule, more like a side effect of build familiarity.

LICENSE

@@ -1,6 +1,6 @@
 This repository uses 2 different licenses :
 - all files in the `lib` directory use a BSD 2-Clause license
-- all other files use a GPLv2 license, unless explicitly stated otherwise
+- all other files use a GPL-2.0-or-later license, unless explicitly stated otherwise
 
 Relevant license is reminded at the top of each source file,
 and with presence of COPYING or LICENSE file in associated directories.

Makefile

@@ -1,6 +1,6 @@
 # ################################################################
 # LZ4 - Makefile
-# Copyright (C) Yann Collet 2011-2020
+# Copyright (C) Yann Collet 2011-2023
 # All rights reserved.
 #
 # BSD license
@@ -36,8 +36,9 @@ TESTDIR = tests
 EXDIR   = examples
 FUZZDIR = ossfuzz
 
-include Makefile.inc
+include build/make/lz4defs.make
 
+MAKE += --no-print-directory
 
 .PHONY: default
 default: lib-release lz4-release
@@ -52,19 +53,17 @@ all: allmost examples manuals build_tests
 allmost: lib lz4
 
 .PHONY: lib lib-release liblz4.a
-lib: liblz4.a
 lib lib-release liblz4.a:
 	$(MAKE) -C $(LZ4DIR) $@
 
 .PHONY: lz4 lz4-release
-lz4 : liblz4.a
-lz4-release : lib-release
 lz4 lz4-release :
 	$(MAKE) -C $(PRGDIR) $@
-	cp $(PRGDIR)/lz4$(EXT) .
+	$(LN_SF) $(PRGDIR)/lz4$(EXT) .
+	echo lz4 build completed
 
 .PHONY: examples
-examples: liblz4.a
+examples: lib
 	$(MAKE) -C $(EXDIR) all
 
 .PHONY: manuals
@@ -76,6 +75,7 @@ build_tests:
 	$(MAKE) -C $(TESTDIR) all
 
 .PHONY: clean
+clean: MAKEFLAGS= --no-print-directory
 clean:
 	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
 	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
@@ -84,7 +84,7 @@ clean:
 	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
 	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
 	$(RM) lz4$(EXT)
-	$(RM) -r $(CMAKE_BUILD_DIR)
+	$(RM) -r $(CMAKE_BUILD_DIR) $(MESON_BUILD_DIR)
 	@echo Cleaning completed
 
 
@@ -113,11 +113,18 @@ HOST_OS = MSYS
 CMAKE_PARAMS = -G"MSYS Makefiles"
 endif
 
-.PHONY: cmake
-cmake:
+.PHONY: cmakebuild
+cmakebuild:
 	mkdir -p $(CMAKE_BUILD_DIR)
 	cd $(CMAKE_BUILD_DIR); $(CMAKE) $(CMAKE_PARAMS) ..; $(CMAKE) --build .
 
+MESON ?= meson
+MESON_BUILD_DIR ?= mesonBuildDir
+
+.PHONY: mesonbuild
+mesonbuild:
+	$(MESON) setup --fatal-meson-warnings --buildtype=debug -Db_lundef=false -Dauto_features=enabled -Dprograms=true -Dcontrib=true -Dtests=true -Dexamples=true build/meson $(MESON_BUILD_DIR)
+	$(MESON) test -C $(MESON_BUILD_DIR)
 
 #------------------------------------------------------------------------
 # make tests validated only for MSYS and Posix environments
@@ -137,23 +144,6 @@ test:
 	$(MAKE) -C $(TESTDIR) $@
 	$(MAKE) -C $(EXDIR) $@
 
-.PHONY: clangtest
-clangtest: CFLAGS += -Werror -Wconversion -Wno-sign-conversion
-clangtest: CC = clang
-clangtest: clean
-	$(CC) -v
-	$(MAKE) -C $(LZ4DIR)  all CC=$(CC)
-	$(MAKE) -C $(PRGDIR)  all CC=$(CC)
-	$(MAKE) -C $(TESTDIR) all CC=$(CC)
-
-.PHONY: clangtest-native
-clangtest-native: CFLAGS = -O3 -Werror -Wconversion -Wno-sign-conversion
-clangtest-native: clean
-	clang -v
-	$(MAKE) -C $(LZ4DIR)  all    CC=clang
-	$(MAKE) -C $(PRGDIR)  native CC=clang
-	$(MAKE) -C $(TESTDIR) native CC=clang
-
 .PHONY: usan
 usan: CC      = clang
 usan: CFLAGS  = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
@@ -161,6 +151,9 @@ usan: LDFLAGS = $(CFLAGS)
 usan: clean
 	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
 
+.PHONY: ubsan
+ubsan: usan
+
 .PHONY: usan32
 usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
 usan32: LDFLAGS = $(CFLAGS)
@@ -181,59 +174,62 @@ cppcheck:
 platformTest: clean
 	@echo "\n ---- test lz4 with $(CC) compiler ----"
 	$(CC) -v
-	CFLAGS="-O3 -Werror"         $(MAKE) -C $(LZ4DIR) all
-	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
-	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror"         $(MAKE) -C $(LZ4DIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
 	$(MAKE) -C $(TESTDIR) test-platform
 
 .PHONY: versionsTest
-versionsTest: clean
+versionsTest:
+	$(MAKE) -C $(TESTDIR) clean
 	$(MAKE) -C $(TESTDIR) $@
 
 .PHONY: test-freestanding
 test-freestanding:
-	$(MAKE) -C $(TESTDIR) clean $@
+	$(MAKE) -C $(TESTDIR) clean
+	$(MAKE) -C $(TESTDIR) $@
+
+# test linking C libraries from C++ executables
+.PHONY: ctocxxtest
+ctocxxtest: LIBCC="$(CC)"
+ctocxxtest: EXECC="$(CXX) -Wno-deprecated"
+ctocxxtest: CFLAGS=-O0
+ctocxxtest:
+	CFLAGS="$(CFLAGS)" CC=$(LIBCC) $(MAKE) -C $(LZ4DIR)  all
+	CC=$(LIBCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
+	CC=$(EXECC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all
 
 .PHONY: cxxtest cxx32test
+cxx32test: CFLAGS += -m32
 cxxtest cxx32test: CC := "$(CXX) -Wno-deprecated"
 cxxtest cxx32test: CFLAGS = -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
-cxx32test: CFLAGS += -m32
-cxxtest cxx32test: clean
+cxxtest cxx32test:
 	$(CXX) -v
-	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
-	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
-	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(LZ4DIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(PRGDIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(TESTDIR) all
 
 .PHONY: cxx17build
 cxx17build : CC = "$(CXX) -Wno-deprecated"
-cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -pedantic
+cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -Wpedantic
 cxx17build : clean
 	$(CXX) -v
 	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"
 
-.PHONY: ctocpptest
-ctocpptest: LIBCC="$(CC)"
-ctocpptest: TESTCC="$(CXX)"
-ctocpptest: CFLAGS=
-ctocpptest: clean
-	CC=$(LIBCC)  $(MAKE) -C $(LZ4DIR)  CFLAGS="$(CFLAGS)" all
-	CC=$(LIBCC)  $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
-	CC=$(TESTCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all
-
 .PHONY: c_standards
 c_standards: clean c_standards_c11 c_standards_c99 c_standards_c90
 
 .PHONY: c_standards_c90
 c_standards_c90: clean
-	$(MAKE) clean; CFLAGS="-std=c90   -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
-	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
+	$(MAKE) clean; CFLAGS="-std=c90   -Werror -Wpedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
+	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -Wpedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
 
 .PHONY: c_standards_c99
 c_standards_c99: clean
-	$(MAKE) clean; CFLAGS="-std=c99   -Werror -pedantic" $(MAKE) all
-	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -pedantic" $(MAKE) all
+	$(MAKE) clean; CFLAGS="-std=c99   -Werror -Wpedantic" $(MAKE) all
+	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -Wpedantic" $(MAKE) all
 
 .PHONY: c_standards_c11
 c_standards_c11: clean
@@ -242,38 +238,20 @@ c_standards_c11: clean
 # The following test ensures that standard Makefile variables set through environment
 # are correctly transmitted at compilation stage.
 # This test is meant to detect issues like https://github.com/lz4/lz4/issues/958
-.PHONY: standard_variables
-standard_variables: clean
-	@echo =================
-	@echo Check support of Makefile Standard variables through environment
-	@echo note : this test requires V=1 to work properly
-	@echo =================
-	CC="cc -DCC_TEST" \
-	CFLAGS=-DCFLAGS_TEST \
-	CPPFLAGS=-DCPPFLAGS_TEST \
-	LDFLAGS=-DLDFLAGS_TEST \
-	LDLIBS=-DLDLIBS_TEST \
-	$(MAKE) V=1 > tmpsv
-	# Note: just checking the presence of custom flags
-	# would not detect situations where custom flags are
-	# supported in some part of the Makefile, and missed in others.
-	# So the test checks if they are present the _right nb of times_.
-	# However, checking static quantities makes this test brittle,
-	# because quantities (7, 2 and 1) can still evolve in future,
-	# for example when source directories or Makefile evolve.
-	if [ $$(grep CC_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CC environment variable missed" && False; fi
-	if [ $$(grep CFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CFLAGS environment variable missed" && False; fi
-	if [ $$(grep CPPFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CPPFLAGS environment variable missed" && False; fi
-	if [ $$(grep LDFLAGS_TEST tmpsv | wc -l) -ne 2 ]; then \
-		echo "LDFLAGS environment variable missed" && False; fi
-	if [ $$(grep LDLIBS_TEST tmpsv | wc -l) -ne 1 ]; then \
-		echo "LDLIBS environment variable missed" && False; fi
-	@echo =================
-	@echo all custom variables detected
-	@echo =================
-	$(RM) tmpsv
+.PHONY: test_stdvars
+test_stdvars:  ## CI helper – verifies CC/CFLAGS/CPPFLAGS/LDFLAGS/LDLIBS propagation
+	@echo '--- standard-variable propagation test ---'
+	@$(RM) .stdvars.log
+
+	@$(MAKE) -rn V=1 \
+	    CC='cc -DCC_TEST' \
+	    CFLAGS='-DCFLAGS_TEST' \
+	    CPPFLAGS='-DCPPFLAGS_TEST' \
+	    LDFLAGS='-DLDFLAGS_TEST' \
+	    LDLIBS='-DLDLIBS_TEST' \
+	  | tee .stdvars.log >/dev/null
+
+	@tests/check_stdvars.sh .stdvars.log
+	@$(RM) .stdvars.log
 
 endif   # MSYS POSIX

NEWS

@@ -1,3 +1,27 @@
+v1.10.0
+cli  : multithreading compression support: improves speed by X times threads allocated
+cli  : overlap decompression with i/o, improving speed by ~+60%
+cli  : support environment variables LZ4_CLEVEL and LZ4_NBWORKERS
+cli  : license of CLI more clearly labelled GPL-2.0-or-later
+cli  : fix: refuse to compress directories
+cli  : fix dictionary compression benchmark on multiple files
+cli  : change: no more implicit `stdout` (except when input is `stdin`)
+lib  : new level 2, offering mid-way performance (speed and compression)
+lib  : Improved lz4frame compression speed for small data (up to +160% at 1KB)
+lib  : Slightly faster (+5%) HC compression speed (levels 3-9), by @JunHe77
+lib  : dictionary compression support now in stable status
+lib  : lz4frame states can be safely reset and reused after a processing error (described by @QrczakMK)
+lib  : `lz4file` API improvements, by @vsolontsov-volant and @t-mat
+lib  : new experimental symbol `LZ4_compress_destSize_extState()`
+build: cmake minimum version raised to 3.5
+build: cmake improvements, by @foxeng, @Ohjurot, @LocalSpook, @teo-tsirpanis, @ur4t and @t-mat
+build: meson scripts are now hosted into `build/` directory, by @eli-schwartz
+build: meson improvements, by @tristan957
+build: Visual Studio solutions generated by `cmake` via scripts
+port : support for loongArch, risc-v, m68k, mips and sparc architectures
+port : improved Visual Studio compatibility, by @t-mat
+port : freestanding support improvements, by @t-mat
+
 v1.9.4
 perf : faster decoding speed (~+20%) on aarch64 platforms
 perf : faster decoding speed (~+70%) for -BD4 setting in CLI

README.md

@@ -20,18 +20,9 @@ It can ingest any input file as dictionary, though only the final 64KB are used.
 This capability can be combined with the [Zstandard Dictionary Builder](https://github.com/facebook/zstd/blob/v1.3.5/programs/zstd.1.md#dictionary-builder),
 in order to drastically improve compression performance on small files.
 
-
 LZ4 library is provided as open-source software using BSD 2-Clause license.
 
 
-|Branch      |Status   |
-|------------|---------|
-|dev         | [![Build status][AppveyorDevBadge]][AppveyorLink]  |
-
-[AppveyorDevBadge]: https://ci.appveyor.com/api/projects/status/github/lz4/lz4?branch=dev&svg=true "Windows test suite"
-[AppveyorLink]: https://ci.appveyor.com/project/YannCollet/lz4-1lndh
-
-
 Benchmarks
 -------------------------
 
@@ -44,7 +35,7 @@ in single-thread mode.
 [lzbench]: https://github.com/inikep/lzbench
 [Silesia Corpus]: http://sun.aei.polsl.pl/~sdeor/index.php?page=silesia
 
-|  Compressor             | Ratio   | Compression | Decompression |
+|  Compressor             | Factor  | Compression | Decompression |
 |  ----------             | -----   | ----------- | ------------- |
 |  memcpy                 |  1.000  | 13700 MB/s  |  13700 MB/s   |
 |**LZ4 default (v1.9.0)** |**2.101**| **780 MB/s**| **4970 MB/s** |
@@ -60,9 +51,6 @@ in single-thread mode.
 [zlib]: http://www.zlib.net/
 [Zstandard]: http://www.zstd.net/
 
-LZ4 is also compatible and optimized for x32 mode,
-for which it provides additional speed performance.
-
 
 Installation
 -------------------------
@@ -123,7 +111,7 @@ Most distributions are bundled with a package manager
 which allows easy installation of both the `liblz4` library
 and the `lz4` command line interface.
 
-[![Packaging status](https://repology.org/badge/vertical-allrepos/lz4.svg)](https://repology.org/project/lz4/versions)
+[![Packaging status](https://repology.org/badge/vertical-allrepos/lz4.svg?columns=4&exclude_unsupported=1)](https://repology.org/project/lz4/versions)
 
 
 ### Special Thanks

appveyor.yml

@@ -1,147 +1,87 @@
 version: 1.0.{build}
+
+# Test matrix: MinGW compilers only (Visual Studio testing moved to GitHub Actions)
 environment:
   matrix:
-  - COMPILER: "gcc"
-    PLATFORM: "mingw64"
-  - COMPILER: "gcc"
-    PLATFORM: "mingw32"
-  - COMPILER: "visual"
-    CONFIGURATION: "Debug"
-    PLATFORM: "x64"
-  - COMPILER: "visual"
-    CONFIGURATION: "Debug"
-    PLATFORM: "Win32"
-  - COMPILER: "visual"
-    CONFIGURATION: "Release"
-    PLATFORM: "x64"
-  - COMPILER: "visual"
-    CONFIGURATION: "Release"
-    PLATFORM: "Win32"
-  - COMPILER: "gcc"
-    PLATFORM: "clang"
+    - COMPILER: gcc
+      PLATFORM: mingw32
+    - COMPILER: gcc
+      PLATFORM: mingw64
+    - COMPILER: clang
+      PLATFORM: mingw64
 
 install:
-  - ECHO Installing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - MKDIR bin
-  - if [%COMPILER%]==[gcc] SET PATH_ORIGINAL=%PATH%
-  - if [%COMPILER%]==[gcc] (
-      SET "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin" &&
-      SET "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin" &&
-      COPY C:\MinGW\bin\mingw32-make.exe C:\MinGW\bin\make.exe &&
-      COPY C:\MinGW\bin\gcc.exe C:\MinGW\bin\cc.exe
-    ) else (
-      IF [%PLATFORM%]==[x64] (SET ADDITIONALPARAM=/p:LibraryPath="C:\Program Files\Microsoft SDKs\Windows\v7.1\lib\x64;c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\lib\amd64;C:\Program Files (x86)\Microsoft Visual Studio 10.0\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\lib\amd64;")
-    )
+  - echo Installing %COMPILER% %PLATFORM%
+  - mkdir bin
+  # Setup MinGW environment
+  - set "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin"
+  - set "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin"
+  - copy C:\MinGW\bin\mingw32-make.exe C:\MinGW\bin\make.exe >nul 2>&1
+  - copy C:\MinGW\bin\gcc.exe C:\MinGW\bin\cc.exe >nul 2>&1
 
 build_script:
-  - if [%PLATFORM%]==[mingw32] SET PATH=%PATH_MINGW32%;%PATH_ORIGINAL%
-  - if [%PLATFORM%]==[mingw64] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL%
-  - if [%PLATFORM%]==[clang] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL%
-  - ECHO *** &&
-      ECHO Building %COMPILER% %PLATFORM% %CONFIGURATION% &&
-      ECHO ***
-  - if [%PLATFORM%]==[clang] (clang -v)
-  - if [%COMPILER%]==[gcc] (gcc -v)
+  - echo "*** Building %COMPILER% %PLATFORM% ***"
+  # Configure PATH for MinGW builds
+  - if [%PLATFORM%]==[mingw32] set PATH=%PATH_MINGW32%;%PATH%
+  - if [%PLATFORM%]==[mingw64] set PATH=%PATH_MINGW64%;%PATH%
+
+  # GCC Build
   - if [%COMPILER%]==[gcc] (
-      echo ----- &&
+      echo "GCC build started" &&
+      gcc -v &&
       make -v &&
-      echo ----- &&
-      if not [%PLATFORM%]==[clang] (
-        make -C programs lz4 &&
-        make -C tests fullbench &&
-        make -C tests fuzzer &&
-        make -C lib lib V=1
-      ) ELSE (
-        make -C programs lz4 CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C tests fullbench CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C tests fuzzer CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C lib lib CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion"
-      )
-    )
-  - if [%COMPILER%]==[gcc] if not [%PLATFORM%]==[clang] (
-      MKDIR bin\dll bin\static bin\example bin\include &&
-      COPY tests\fullbench.c bin\example\ &&
-      COPY lib\xxhash.c bin\example\ &&
-      COPY lib\xxhash.h bin\example\ &&
-      COPY lib\lz4.h bin\include\ &&
-      COPY lib\lz4hc.h bin\include\ &&
-      COPY lib\lz4frame.h bin\include\ &&
-      COPY lib\liblz4.a bin\static\liblz4_static.lib &&
-      COPY lib\liblz4.dll* bin\dll\ &&
-      COPY lib\dll\example\Makefile bin\example\ &&
-      COPY lib\dll\example\fullbench-dll.* bin\example\ &&
-      COPY lib\dll\example\README.md bin\ &&
-      COPY programs\lz4.exe bin\lz4.exe
-    )
-  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] (
-      7z.exe a -bb1 bin\lz4_x64.zip NEWS .\bin\lz4.exe .\bin\README.md .\bin\example .\bin\dll .\bin\static .\bin\include &&
-      appveyor PushArtifact bin\lz4_x64.zip
-    )
-  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] (
-      7z.exe a -bb1 bin\lz4_x86.zip NEWS .\bin\lz4.exe .\bin\README.md .\bin\example .\bin\dll .\bin\static .\bin\include &&
-      appveyor PushArtifact bin\lz4_x86.zip
-    )
-  - if [%COMPILER%]==[gcc] (COPY tests\*.exe programs\)
-  - if [%COMPILER%]==[visual] (
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2010 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" %ADDITIONALPARAM% /m /verbosity:minimal /property:PlatformToolset=v100 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /p:EnableWholeProgramOptimization=true /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2012 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v110 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2013 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v120 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2015 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v140 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      COPY build\VS2010\bin\%PLATFORM%_%CONFIGURATION%\*.exe programs\
+      make -j -C programs lz4 V=1 &&
+      make -j -C tests fullbench V=1 &&
+      make -j -C tests fuzzer V=1 &&
+      make -j -C lib lib V=1 LDFLAGS="-static-libgcc" &&
+      echo "Packaging GCC build..." &&
+      mkdir bin\dll bin\static bin\example bin\include &&
+      copy tests\fullbench.c bin\example\ &&
+      copy lib\xxhash.* bin\example\ &&
+      copy lib\lz4*.h bin\include\ &&
+      copy lib\liblz4.a bin\static\liblz4_static.lib &&
+      copy lib\liblz4.dll.a bin\dll\ >nul 2>&1 &&
+      (copy lib\liblz4.dll bin\dll\ 2>nul || copy lib\msys-lz4-1.dll bin\dll\liblz4.dll 2>nul || copy lib\cyglz4-1.dll bin\dll\liblz4.dll 2>nul || echo DLL copy warning) &&
+      copy lib\dll\example\* bin\example\ >nul 2>&1 &&
+      copy programs\lz4.exe bin\lz4.exe &&
+      copy tests\*.exe programs\
     )
 
-test_script:
-  - ECHO *** &&
-      ECHO Testing %COMPILER% %PLATFORM% %CONFIGURATION% &&
-      ECHO ***
-  - if not [%COMPILER%]==[unknown] (
-      CD programs &&
-      lz4 -h &&
-      lz4 -i1b lz4.exe &&
-      lz4 -i1b5 lz4.exe &&
-      lz4 -i1b10 lz4.exe &&
-      lz4 -i1b15 lz4.exe &&
-      echo ------- lz4 tested ------- &&
-      fullbench.exe -i1 fullbench.exe &&
-      echo trying to launch fuzzer.exe &&
-      fuzzer.exe -v -T30s
+  # Clang Build
+  - if [%COMPILER%]==[clang] (
+      echo "Clang build started" &&
+      clang -v &&
+      make -v &&
+      set "CFLAGS=--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
+      make -j -C programs lz4 CC=clang V=1 &&
+      make -j -C tests fullbench CC=clang V=1 &&
+      make -j -C tests fuzzer CC=clang V=1 &&
+      make -j -C lib lib CC=clang V=1 &&
+      copy tests\*.exe programs\
     )
 
+  # Create release archives (GCC only)
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] 7z.exe a -bb1 bin\lz4_x64.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] appveyor PushArtifact bin\lz4_x64.zip
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] 7z.exe a -bb1 bin\lz4_x86.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] appveyor PushArtifact bin\lz4_x86.zip
+
+test_script:
+  - echo "*** Testing %COMPILER% %PLATFORM% ***"
+  - cd programs
+  - lz4 -h
+  - lz4 -i1b lz4.exe
+  - lz4 -i1b5 lz4.exe
+  - lz4 -i1b10 lz4.exe
+  - lz4 -i1b15 lz4.exe
+  - echo "------- lz4 tested -------"
+  - fullbench.exe -i0 fullbench.exe
+  - echo "Launching fuzzer test..."
+  - fuzzer.exe -v -T20s
+  - cd ..
+
 artifacts:
   - path: bin\lz4_x64.zip
+    name: LZ4 Windows x64 Build
   - path: bin\lz4_x86.zip
-
-deploy:
-- provider: GitHub
-  artifact: bin\lz4_x64.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw64"
-    appveyor_repo_tag: true
-
-- provider: GitHub
-  artifact: bin\lz4_x86.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw32"
-    appveyor_repo_tag: true
+    name: LZ4 Windows x86 Build

build/README.md

@@ -6,23 +6,11 @@ Projects for various integrated development environments (IDE)
 The following projects are included with the lz4 distribution:
 - `cmake` - CMake project
 - `meson` - Meson project
-- `VS2010` - Visual Studio 2010 project (which also works well with Visual Studio 2012, 2013, 2015)
-- `VS2017` - Visual Studio 2017 project
+- `visual` - scripts to generate Visual Studio solutions from `cmake` script
+- `VS2022` - Visual Studio 2022 solution - will soon be deprecated, prefer `visual` generators
 
 
-#### How to compile lz4 with Visual Studio
-
-1. Install Visual Studio e.g. VS 2015 Community Edition (it's free).
-2. Download the latest version of lz4 from https://github.com/lz4/lz4/releases
-3. Decompress ZIP archive.
-4. Go to decompressed directory then to `build` then `VS2010` and open `lz4.sln`
-5. Visual Studio will ask about converting VS2010 project to VS2015 and you should agree.
-6. Change `Debug` to `Release` and if you have 64-bit Windows change also `Win32` to `x64`.
-7. Press F7 on keyboard or select `BUILD` from the menu bar and choose `Build Solution`.
-8. If compilation will be fine a compiled executable will be in `build\VS2010\bin\x64_Release\lz4.exe`
-
-
-#### Projects available within lz4.sln
+#### Projects available within VS2022\lz4.sln
 
 The Visual Studio solution file `lz4.sln` contains many projects that will be compiled to the
 `build\VS2010\bin\$(Platform)_$(Configuration)` directory. For example `lz4` set to `x64` and

build/VS2010/datagen/datagen.vcxproj

@@ -1,169 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{D745AE2F-596A-403A-9B91-81A8C6779243}</ProjectGuid>
-    <Keyword>Win32Proj</Keyword>
-    <RootNamespace>datagen</RootNamespace>
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-    <WholeProgramOptimization Condition="'$(EnableWholeProgramOptimization)'=='true'">true</WholeProgramOptimization>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-    <WholeProgramOptimization Condition="'$(EnableWholeProgramOptimization)'=='true'">true</WholeProgramOptimization>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LinkIncremental>true</LinkIncremental>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <LinkIncremental>true</LinkIncremental>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-    <RunCodeAnalysis>true</RunCodeAnalysis>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <LinkIncremental>false</LinkIncremental>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <LinkIncremental>false</LinkIncremental>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-    <RunCodeAnalysis>true</RunCodeAnalysis>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <EnablePREfast>false</EnablePREfast>
-      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreadedDebug</RuntimeLibrary>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <ClCompile>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <EnablePREfast>true</EnablePREfast>
-      <AdditionalOptions>/analyze:stacksize295252 %(AdditionalOptions)</AdditionalOptions>
-      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreadedDebug</RuntimeLibrary>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <Optimization>MaxSpeed</Optimization>
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build/VS2010/lz4/lz4.rc

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-// Microsoft Visual C++ generated resource script.
-//
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-#include "lz4.h" /* LZ4_VERSION_STRING */
-#define APSTUDIO_READONLY_SYMBOLS
-#include "verrsrc.h"
-#undef APSTUDIO_READONLY_SYMBOLS
-
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-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-LANGUAGE 9, 1
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Version
-//
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-VS_VERSION_INFO     VERSIONINFO
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-  PRODUCTVERSION    LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
- FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
-#ifdef _DEBUG
- FILEFLAGS VS_FF_DEBUG
-#else
- FILEFLAGS 0x0L
-#endif
- FILEOS VOS_NT_WINDOWS32
- FILETYPE VFT_DLL
- FILESUBTYPE VFT2_UNKNOWN
-BEGIN
-    BLOCK "StringFileInfo"
-    BEGIN
-        BLOCK "040904B0"
-        BEGIN
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-            VALUE "FileDescription", "Extremely fast compression"
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-            VALUE "LegalCopyright", "Copyright (C) 2013-2020, Yann Collet"
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-            VALUE "ProductName", "LZ4"
-            VALUE "ProductVersion", LZ4_VERSION_STRING
-        END
-    END
-    BLOCK "VarFileInfo"
-    BEGIN
-        VALUE "Translation", 0x0409, 1200
-    END
-END
-
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-		{9800039D-4AAA-43A4-BB78-FEF6F4836927} = {9800039D-4AAA-43A4-BB78-FEF6F4836927}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lz4", "lz4\lz4.vcxproj", "{60A3115E-B988-41EE-8815-F4D4F253D866}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Debug|x64 = Debug|x64
-		Release|Win32 = Release|Win32
-		Release|x64 = Release|x64
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|Win32.Build.0 = Debug|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|x64.ActiveCfg = Debug|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|x64.Build.0 = Debug|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|Win32.ActiveCfg = Release|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|Win32.Build.0 = Release|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|x64.ActiveCfg = Release|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|x64.Build.0 = Release|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|Win32.Build.0 = Debug|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|x64.ActiveCfg = Debug|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|x64.Build.0 = Debug|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|Win32.ActiveCfg = Release|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|Win32.Build.0 = Release|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|x64.ActiveCfg = Release|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|x64.Build.0 = Release|x64
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-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|Win32.Build.0 = Debug|Win32
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-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|x64.Build.0 = Debug|x64
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|Win32.ActiveCfg = Release|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|Win32.Build.0 = Release|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|x64.ActiveCfg = Release|x64
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-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Debug|x64.Build.0 = Debug|x64
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|Win32.ActiveCfg = Release|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|Win32.Build.0 = Release|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|x64.ActiveCfg = Release|x64
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-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Debug|Win32.Build.0 = Debug|Win32
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-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|Win32.Build.0 = Release|Win32
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|x64.ActiveCfg = Release|x64
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|x64.Build.0 = Release|x64
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-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|Win32.ActiveCfg = Release|Win32
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|Win32.Build.0 = Release|Win32
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-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|Win32.ActiveCfg = Debug|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|Win32.Build.0 = Debug|Win32
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-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|x64.Build.0 = Debug|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|Win32.ActiveCfg = Release|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|Win32.Build.0 = Release|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|x64.ActiveCfg = Release|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|x64.Build.0 = Release|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|Win32.ActiveCfg = Debug|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|Win32.Build.0 = Debug|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|x64.ActiveCfg = Debug|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|x64.Build.0 = Debug|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|Win32.ActiveCfg = Release|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|Win32.Build.0 = Release|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|x64.ActiveCfg = Release|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|x64.Build.0 = Release|x64
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {BBC259B2-BABF-47CD-8A6A-7B8318A803AC}
-	EndGlobalSection
-EndGlobal

build/VS2017/lz4/lz4.rc

@@ -1,51 +0,0 @@
-// Microsoft Visual C++ generated resource script.
-//
-
-#include "lz4.h" /* LZ4_VERSION_STRING */
-#define APSTUDIO_READONLY_SYMBOLS
-#include "verrsrc.h"
-#undef APSTUDIO_READONLY_SYMBOLS
-
-
-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-LANGUAGE 9, 1
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Version
-//
-
-VS_VERSION_INFO     VERSIONINFO
-  FILEVERSION       LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
-  PRODUCTVERSION    LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
- FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
-#ifdef _DEBUG
- FILEFLAGS VS_FF_DEBUG
-#else
- FILEFLAGS 0x0L
-#endif
- FILEOS VOS_NT_WINDOWS32
- FILETYPE VFT_DLL
- FILESUBTYPE VFT2_UNKNOWN
-BEGIN
-    BLOCK "StringFileInfo"
-    BEGIN
-        BLOCK "040904B0"
-        BEGIN
-            VALUE "CompanyName", "Yann Collet"
-            VALUE "FileDescription", "Extremely fast compression"
-            VALUE "FileVersion", LZ4_VERSION_STRING
-            VALUE "InternalName", "lz4.exe"
-            VALUE "LegalCopyright", "Copyright (C) 2013-2020, Yann Collet"
-            VALUE "OriginalFilename", "lz4.exe"
-            VALUE "ProductName", "LZ4"
-            VALUE "ProductVersion", LZ4_VERSION_STRING
-        END
-    END
-    BLOCK "VarFileInfo"
-    BEGIN
-        VALUE "Translation", 0x0409, 1200
-    END
-END
-
-#endif

build/VS2017/lz4/lz4.vcxproj

@@ -1,175 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <VCProjectVersion>15.0</VCProjectVersion>
-    <ProjectGuid>{60A3115E-B988-41EE-8815-F4D4F253D866}</ProjectGuid>
-    <RootNamespace>lz4</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <WholeProgramOptimization>false</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>MultiByte</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="Shared">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\lib;$(SolutionDir)..\..\programs;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\lib;$(SolutionDir)..\..\programs;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-    <LinkIncremental>false</LinkIncremental>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\lib;$(SolutionDir)..\..\programs;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\lib;$(SolutionDir)..\..\programs;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
-    <LinkIncremental>false</LinkIncremental>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <WarningLevel>Level4</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <SDLCheck>true</SDLCheck>
-      <ConformanceMode>true</ConformanceMode>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-    </ClCompile>
-    <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <SubSystem>Console</SubSystem>
-      <OptimizeReferences>false</OptimizeReferences>
-      <EnableCOMDATFolding>false</EnableCOMDATFolding>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <SDLCheck>true</SDLCheck>
-      <ConformanceMode>true</ConformanceMode>
-    </ClCompile>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-      <ConformanceMode>true</ConformanceMode>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-    </ClCompile>
-    <Link>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <SubSystem>Console</SubSystem>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-      <ConformanceMode>true</ConformanceMode>
-    </ClCompile>
-    <Link>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemGroup>
-    <ClCompile Include="..\..\..\lib\lz4.c" />
-    <ClCompile Include="..\..\..\lib\lz4frame.c" />
-    <ClCompile Include="..\..\..\lib\lz4hc.c" />
-    <ClCompile Include="..\..\..\lib\xxhash.c" />
-    <ClCompile Include="..\..\..\programs\bench.c" />
-    <ClCompile Include="..\..\..\programs\datagen.c" />
-    <ClCompile Include="..\..\..\programs\lz4cli.c" />
-    <ClCompile Include="..\..\..\programs\lz4io.c" />
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="..\..\..\lib\lz4.h" />
-    <ClInclude Include="..\..\..\lib\lz4frame.h" />
-    <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
-    <ClInclude Include="..\..\..\lib\lz4hc.h" />
-    <ClInclude Include="..\..\..\lib\xxhash.h" />
-    <ClInclude Include="..\..\..\programs\bench.h" />
-    <ClInclude Include="..\..\..\programs\datagen.h" />
-    <ClInclude Include="..\..\..\programs\lz4io.h" />
-  </ItemGroup>
-  <ItemGroup>
-    <ResourceCompile Include="lz4.rc" />
-  </ItemGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>

build/VS2022/datagen/datagen.vcxproj

@@ -161,13 +161,17 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\..\programs\datagen.c" />
+    <ClCompile Include="..\..\..\programs\lorem.c" />
+    <ClCompile Include="..\..\..\tests\datagen.c" />
     <ClCompile Include="..\..\..\tests\datagencli.c" />
+    <ClCompile Include="..\..\..\tests\loremOut.c" />
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="..\..\..\programs\datagen.h" />
+    <ClInclude Include="..\..\..\programs\lorem.h" />
+    <ClInclude Include="..\..\..\tests\datagen.h" />
+    <ClInclude Include="..\..\..\tests\loremOut.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

build/VS2022/frametest/frametest.vcxproj

@@ -162,6 +162,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\lib\lz4.c" />
+    <ClCompile Include="..\..\..\lib\lz4file.c" />
     <ClCompile Include="..\..\..\lib\lz4frame.c" />
     <ClCompile Include="..\..\..\lib\lz4hc.c" />
     <ClCompile Include="..\..\..\lib\xxhash.c" />
@@ -169,6 +170,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\lib\lz4.h" />
+    <ClInclude Include="..\..\..\lib\lz4file.h" />
     <ClInclude Include="..\..\..\lib\lz4frame.h" />
     <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
     <ClInclude Include="..\..\..\lib\lz4hc.h" />
@@ -177,4 +179,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

build/VS2022/lz4/lz4.vcxproj

@@ -162,9 +162,12 @@
     <ClCompile Include="..\..\..\lib\lz4hc.c" />
     <ClCompile Include="..\..\..\lib\xxhash.c" />
     <ClCompile Include="..\..\..\programs\bench.c" />
-    <ClCompile Include="..\..\..\programs\datagen.c" />
+    <ClCompile Include="..\..\..\programs\lorem.c" />
     <ClCompile Include="..\..\..\programs\lz4cli.c" />
     <ClCompile Include="..\..\..\programs\lz4io.c" />
+    <ClCompile Include="..\..\..\programs\threadpool.c" />
+    <ClCompile Include="..\..\..\programs\timefn.c" />
+    <ClCompile Include="..\..\..\programs\util.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\lib\lz4.h" />
@@ -173,8 +176,9 @@
     <ClInclude Include="..\..\..\lib\lz4hc.h" />
     <ClInclude Include="..\..\..\lib\xxhash.h" />
     <ClInclude Include="..\..\..\programs\bench.h" />
-    <ClInclude Include="..\..\..\programs\datagen.h" />
+    <ClInclude Include="..\..\..\programs\lorem.h" />
     <ClInclude Include="..\..\..\programs\lz4io.h" />
+    <ClInclude Include="..\..\..\programs\util.h" />
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="lz4.rc" />
@@ -182,4 +186,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

build/cmake/CMakeLists.txt

@@ -6,46 +6,69 @@
 # any warranty.
 #
 # For details, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-#
-# LZ4's CMake support is maintained by Evan Nemerson; when filing
-# bugs please mention @nemequ to make sure I see it.
 
-cmake_minimum_required(VERSION 3.5)
+
+# Use range version specification for policy control while maintaining 
+# compatibility with older CMake versions
+cmake_minimum_required(VERSION 3.5...4.0.2)
 
 set(LZ4_TOP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
 
-# Parse version information
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MAJOR REGEX "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MAJOR "${LZ4_VERSION_MAJOR}")
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MINOR REGEX "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MINOR "${LZ4_VERSION_MINOR}")
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_RELEASE REGEX "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$" "\\1" LZ4_VERSION_RELEASE "${LZ4_VERSION_RELEASE}")
+#-----------------------------------------------------------------------------
+# VERSION EXTRACTION - Parse version information from header file
+#-----------------------------------------------------------------------------
+function(parse_lz4_version VERSION_TYPE)
+    file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" version_line REGEX "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$")
+    string(REGEX REPLACE "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$" "\\1" version_number "${version_line}")
+    set(LZ4_VERSION_${VERSION_TYPE} ${version_number} PARENT_SCOPE)
+endfunction()
+
+foreach(version_type IN ITEMS MAJOR MINOR RELEASE)
+    parse_lz4_version(${version_type})
+endforeach()
+
 set(LZ4_VERSION_STRING "${LZ4_VERSION_MAJOR}.${LZ4_VERSION_MINOR}.${LZ4_VERSION_RELEASE}")
 mark_as_advanced(LZ4_VERSION_STRING LZ4_VERSION_MAJOR LZ4_VERSION_MINOR LZ4_VERSION_RELEASE)
 
+message(STATUS "Creating build script for LZ4 version: ${LZ4_VERSION_STRING}")
+
 project(LZ4 VERSION ${LZ4_VERSION_STRING} LANGUAGES C)
 
-option(LZ4_BUILD_CLI "Build lz4 program" ON)
-option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c program with legacy argument support" ON)
+#-----------------------------------------------------------------------------
+# DEFAULT BUILD TYPE - Set Release as default when no build type is specified
+#-----------------------------------------------------------------------------
+# Set a default build type if none was specified
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message(STATUS "Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+  # Set the possible values of build type for cmake-gui
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
 
-# If LZ4 is being bundled in another project, we don't want to
-# install anything.  However, we want to let people override this, so
-# we'll use the LZ4_BUNDLED_MODE variable to let them do that; just
-# set it to OFF in your project before you add_subdirectory(lz4/contrib/cmake_unofficial).
-get_directory_property(LZ4_PARENT_DIRECTORY PARENT_DIRECTORY)
-if("${LZ4_BUNDLED_MODE}" STREQUAL "")
-  # Bundled mode hasn't been set one way or the other, set the default
-  # depending on whether or not we are the top-level project.
-  if("${LZ4_PARENT_DIRECTORY}" STREQUAL "")
-    set(LZ4_BUNDLED_MODE OFF)
-  else()
+#-----------------------------------------------------------------------------
+# BUILD OPTIONS - Configure build targets and features
+#-----------------------------------------------------------------------------
+option(LZ4_BUILD_CLI "Build lz4 program" ON)
+option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c program with legacy argument support" OFF)
+
+
+# Determine if LZ4 is being built as part of another project.
+# If LZ4 is bundled in another project, we don't want to install anything.
+# Default behavior can be overridden by setting the LZ4_BUNDLED_MODE variable.
+if(NOT DEFINED LZ4_BUNDLED_MODE)
+  get_directory_property(LZ4_IS_SUBPROJECT PARENT_DIRECTORY)
+  if(LZ4_IS_SUBPROJECT)
     set(LZ4_BUNDLED_MODE ON)
+  else()
+    set(LZ4_BUNDLED_MODE OFF)
   endif()
 endif()
 mark_as_advanced(LZ4_BUNDLED_MODE)
 
-# CPack
+#-----------------------------------------------------------------------------
+# PACKAGING - CPack configuration
+#-----------------------------------------------------------------------------
 if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
   set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LZ4 compression library")
   set(CPACK_PACKAGE_DESCRIPTION_FILE "${LZ4_TOP_SOURCE_DIR}/README.md")
@@ -56,6 +79,9 @@ if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
   include(CPack)
 endif(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
 
+#-----------------------------------------------------------------------------
+# LIBRARY TYPE CONFIGURATION - Static vs Shared libraries
+#-----------------------------------------------------------------------------
 # Allow people to choose whether to build shared or static libraries
 # via the BUILD_SHARED_LIBS option unless we are in bundled mode, in
 # which case we always use static libraries.
@@ -65,33 +91,40 @@ CMAKE_DEPENDENT_OPTION(BUILD_STATIC_LIBS "Build static libraries" OFF "BUILD_SHA
 
 if(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
   message(FATAL_ERROR "Both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS have been disabled")
-endif()
+endif(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
 
+#-----------------------------------------------------------------------------
+# SOURCE FILES & DIRECTORIES - Path setup and source file collection
+#-----------------------------------------------------------------------------
 set(LZ4_LIB_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/lib")
 set(LZ4_PROG_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/programs")
 
 include_directories("${LZ4_LIB_SOURCE_DIR}")
 
 # CLI sources
-set(LZ4_SOURCES
-  "${LZ4_LIB_SOURCE_DIR}/lz4.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4hc.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4.h"
-  "${LZ4_LIB_SOURCE_DIR}/lz4hc.h"
-  "${LZ4_LIB_SOURCE_DIR}/lz4frame.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
-  "${LZ4_LIB_SOURCE_DIR}/xxhash.c")
-set(LZ4_CLI_SOURCES
-  "${LZ4_PROG_SOURCE_DIR}/bench.c"
-  "${LZ4_PROG_SOURCE_DIR}/lz4cli.c"
-  "${LZ4_PROG_SOURCE_DIR}/lz4io.c"
-  "${LZ4_PROG_SOURCE_DIR}/datagen.c")
+file(GLOB LZ4_SOURCES
+     "${LZ4_LIB_SOURCE_DIR}/*.c")
+file(GLOB LZ4_CLI_SOURCES
+     "${LZ4_PROG_SOURCE_DIR}/*.c")
+list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES}) # LZ4_CLI always use liblz4 sources directly.
 
+#-----------------------------------------------------------------------------
+# POSITION INDEPENDENT CODE - PIC settings for static libraries
+#-----------------------------------------------------------------------------
 # Whether to use position independent code for the static library.  If
 # we're building a shared library this is ignored and PIC is always
 # used.
-option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ON)
+if(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT ON)
+else()
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT OFF)
+endif(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
 
+option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ${LZ4_POSITION_INDEPENDENT_LIB_DEFAULT})
+
+#-----------------------------------------------------------------------------
+# TARGETS - Library and executable targets
+#-----------------------------------------------------------------------------
 # liblz4
 include(GNUInstallDirs)
 set(LZ4_LIBRARIES_BUILT)
@@ -107,14 +140,14 @@ if(BUILD_SHARED_LIBS)
   if(MSVC)
     target_compile_definitions(lz4_shared PRIVATE
       LZ4_DLL_EXPORT=1)
-  endif()
+  endif(MSVC)
   list(APPEND LZ4_LIBRARIES_BUILT lz4_shared)
 endif()
 if(BUILD_STATIC_LIBS)
   set(STATIC_LIB_NAME lz4)
-  if (MSVC AND BUILD_SHARED_LIBS)
+  if(MSVC AND BUILD_SHARED_LIBS)
     set(STATIC_LIB_NAME lz4_static)
-  endif()
+  endif(MSVC AND BUILD_SHARED_LIBS)
   add_library(lz4_static STATIC ${LZ4_SOURCES})
   target_include_directories(lz4_static
     PUBLIC $<BUILD_INTERFACE:${LZ4_LIB_SOURCE_DIR}>
@@ -124,74 +157,112 @@ if(BUILD_STATIC_LIBS)
     POSITION_INDEPENDENT_CODE ${LZ4_POSITION_INDEPENDENT_LIB})
   list(APPEND LZ4_LIBRARIES_BUILT lz4_static)
 endif()
-
-# xxhash namesapce
+# Add unified target.
+add_library(lz4 INTERFACE)
+list(APPEND LZ4_LIBRARIES_BUILT lz4)
 if(BUILD_SHARED_LIBS)
-  target_compile_definitions(lz4_shared PRIVATE 
-    XXH_NAMESPACE=LZ4_)
-endif()
-if(BUILD_STATIC_LIBS)
-  target_compile_definitions(lz4_static PRIVATE 
-    XXH_NAMESPACE=LZ4_)
-endif()
-
-if(BUILD_STATIC_LIBS)
-  set(LZ4_LINK_LIBRARY lz4_static)
+  target_link_libraries(lz4 INTERFACE lz4_shared)
 else()
-  list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES})
+  target_link_libraries(lz4 INTERFACE lz4_static)
+endif(BUILD_SHARED_LIBS)
+
+#-----------------------------------------------------------------------------
+# DEBUG CONFIGURATION - Configurable LZ4_DEBUG level
+#-----------------------------------------------------------------------------
+# LZ4_DEBUG levels:
+# 0 - Disable everything (default for Release)
+# 1 - Enable assert() statements  
+# 2-8 - Enable debug traces with increasing verbosity
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(LZ4_DEBUG_LEVEL_DEFAULT 1)
+else()
+  set(LZ4_DEBUG_LEVEL_DEFAULT 0)
 endif()
 
+set(LZ4_DEBUG_LEVEL ${LZ4_DEBUG_LEVEL_DEFAULT} CACHE STRING 
+    "LZ4 debug level: 0=disabled, 1=assert(), 2-8=debug traces with increasing verbosity")
+set_property(CACHE LZ4_DEBUG_LEVEL PROPERTY STRINGS "0" "1" "2" "3" "4" "5" "6" "7" "8")
+
+# Apply LZ4_DEBUG configuration if level > 0
+if(LZ4_DEBUG_LEVEL GREATER 0)
+  if(MSVC)
+    add_definitions(/DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  else()
+    add_definitions(-DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  endif()
+endif()
+
+#-----------------------------------------------------------------------------
+# NAMESPACE CONFIGURATION - xxHash namespace settings
+#-----------------------------------------------------------------------------
+# xxhash namespace
+if(BUILD_SHARED_LIBS)
+  target_compile_definitions(lz4_shared PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_SHARED_LIBS)
+if(BUILD_STATIC_LIBS)
+  target_compile_definitions(lz4_static PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_STATIC_LIBS)
+
+#-----------------------------------------------------------------------------
+# CLI EXECUTABLES - Configuring command-line programs
+#-----------------------------------------------------------------------------
 # lz4
-if (LZ4_BUILD_CLI)
+if(LZ4_BUILD_CLI)
   set(LZ4_PROGRAMS_BUILT lz4cli)
   add_executable(lz4cli ${LZ4_CLI_SOURCES})
   set_target_properties(lz4cli PROPERTIES OUTPUT_NAME lz4)
-  if (BUILD_STATIC_LIBS)
-    target_link_libraries(lz4cli ${LZ4_LINK_LIBRARY})
-  endif()
-endif()
+endif(LZ4_BUILD_CLI)
 
 # lz4c
-if (LZ4_BUILD_LEGACY_LZ4C)
+if(LZ4_BUILD_LEGACY_LZ4C)
   list(APPEND LZ4_PROGRAMS_BUILT lz4c)
   add_executable(lz4c ${LZ4_CLI_SOURCES})
   set_target_properties(lz4c PROPERTIES COMPILE_DEFINITIONS "ENABLE_LZ4C_LEGACY_OPTIONS")
-  if (BUILD_STATIC_LIBS)
-    target_link_libraries(lz4c ${LZ4_LINK_LIBRARY})
-  endif()
-endif()
+endif(LZ4_BUILD_LEGACY_LZ4C)
 
+#-----------------------------------------------------------------------------
+# COMPILER FLAGS - Configure warning flags and compiler-specific options
+#-----------------------------------------------------------------------------
 # Extra warning flags
-include (CheckCCompilerFlag)
-foreach (flag
-    # GCC-style
-    -Wall
-    -Wextra
-    -Wundef
-    -Wcast-qual
-    -Wcast-align
-    -Wshadow
-    -Wswitch-enum
-    -Wdeclaration-after-statement
-    -Wstrict-prototypes
-    -Wpointer-arith
+if(MSVC)
+  set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /W4")
+else()
+  include(CheckCCompilerFlag)
+  foreach(flag
+      # GCC-style
+      -pedantic-errors
+      -Wall
+      -Wextra
+      -Wundef
+      -Wcast-qual
+      -Wcast-align
+      -Wshadow
+      -Wswitch-enum
+      -Wdeclaration-after-statement
+      -Wstrict-prototypes
+      -Wpointer-arith)
 
-    # MSVC-style
-    /W4)
-  # Because https://gcc.gnu.org/wiki/FAQ#wnowarning
-  string(REGEX REPLACE "\\-Wno\\-(.+)" "-W\\1" flag_to_test "${flag}")
-  string(REGEX REPLACE "[^a-zA-Z0-9]+" "_" test_name "CFLAG_${flag_to_test}")
+    # Because https://gcc.gnu.org/wiki/FAQ#wnowarning
+    string(REGEX REPLACE "\\-Wno\\-(.+)" "-W\\1" flag_to_test "${flag}")
+    string(REGEX REPLACE "[^a-zA-Z0-9]+" "_" test_name "CFLAG_${flag_to_test}")
 
-  check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name})
+    check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name})
 
-  if(${test_name})
-    set(CMAKE_C_FLAGS "${flag} ${CMAKE_C_FLAGS}")
-  endif()
+    if(${test_name})
+      set(CMAKE_C_FLAGS_DEBUG "${flag} ${CMAKE_C_FLAGS_DEBUG}")
+    endif()
 
-  unset(test_name)
-  unset(flag_to_test)
-endforeach (flag)
+    unset(test_name)
+    unset(flag_to_test)
+  endforeach(flag)
+endif(MSVC)
 
+
+#-----------------------------------------------------------------------------
+# INSTALLATION - Install targets, headers, and documentation
+#-----------------------------------------------------------------------------
 if(NOT LZ4_BUNDLED_MODE)
   install(TARGETS ${LZ4_PROGRAMS_BUILT}
     BUNDLE	DESTINATION "${CMAKE_INSTALL_BINDIR}"
@@ -203,14 +274,18 @@ if(NOT LZ4_BUNDLED_MODE)
     RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
   install(FILES
     "${LZ4_LIB_SOURCE_DIR}/lz4.h"
-    "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
     "${LZ4_LIB_SOURCE_DIR}/lz4hc.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4file.h"
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
   install(FILES "${LZ4_PROG_SOURCE_DIR}/lz4.1"
     DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
   install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblz4.pc"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 
+#-----------------------------------------------------------------------------
+# CMAKE PACKAGE CONFIG - Configure CMake package for find_package support
+#-----------------------------------------------------------------------------
   include(CMakePackageConfigHelpers)
   write_basic_package_version_file(
     "${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake"
@@ -235,16 +310,25 @@ if(NOT LZ4_BUNDLED_MODE)
       ${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake
     DESTINATION ${LZ4_PKG_INSTALLDIR})
 
-  # install lz4cat and unlz4 symlinks on *nix
+#-----------------------------------------------------------------------------
+# SYMLINKS - Create and install Unix symlinks and manpage aliases
+#-----------------------------------------------------------------------------
+  # Install lz4cat and unlz4 symlinks on Unix systems
   if(UNIX AND LZ4_BUILD_CLI)
-    install(CODE "
-      foreach(f lz4cat unlz4)
-        set(dest \"\$ENV{DESTDIR}${CMAKE_INSTALL_FULL_BINDIR}/\${f}\")
-        message(STATUS \"Symlinking: \${dest} -> lz4\")
-        execute_process(
-          COMMAND \"${CMAKE_COMMAND}\" -E create_symlink lz4 \"\${dest}\")
-      endforeach()
-    ")
+    foreach(cli_tool IN ITEMS lz4cat unlz4)
+      # Create a custom target for the symlink creation
+      add_custom_target("create_${cli_tool}_symlink" ALL
+        COMMAND ${CMAKE_COMMAND} -E create_symlink
+          $<TARGET_FILE_NAME:lz4cli> ${cli_tool}
+        DEPENDS lz4cli
+        COMMENT "Creating symlink for ${cli_tool}"
+        VERBATIM)
+
+      # Install the symlink into the binary installation directory
+      install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${cli_tool}"
+        DESTINATION ${CMAKE_INSTALL_BINDIR}
+        RENAME ${cli_tool})
+    endforeach()
 
     # create manpage aliases
     foreach(f lz4cat unlz4)
@@ -255,6 +339,9 @@ if(NOT LZ4_BUNDLED_MODE)
   endif(UNIX AND LZ4_BUILD_CLI)
 endif(NOT LZ4_BUNDLED_MODE)
 
+#-----------------------------------------------------------------------------
+# PKG-CONFIG - Generate and install pkg-config file
+#-----------------------------------------------------------------------------
 # pkg-config
 set(PREFIX "${CMAKE_INSTALL_PREFIX}")
 
@@ -262,13 +349,13 @@ if("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INST
   set(LIBDIR "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
 else()
   set(LIBDIR "${CMAKE_INSTALL_FULL_LIBDIR}")
-endif()
+endif("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 
 if("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
   set(INCLUDEDIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
 else()
   set(INCLUDEDIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
-endif()
+endif("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
 
 # for liblz4.pc substitution
 set(VERSION ${LZ4_VERSION_STRING})

build/cmake/lz4Config.cmake.in

@@ -1,2 +1,10 @@
 @PACKAGE_INIT@
-include( "${CMAKE_CURRENT_LIST_DIR}/lz4Targets.cmake" )
+include( "${CMAKE_CURRENT_LIST_DIR}/lz4Targets.cmake" )
+if(NOT TARGET lz4::lz4)
+    add_library(lz4::lz4 INTERFACE IMPORTED)
+    if("@BUILD_SHARED_LIBS@")
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_shared)
+    else()
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_static)
+    endif()
+endif()

build/make/README.md

@@ -0,0 +1,69 @@
+# multiconf.make
+
+**multiconf.make** is a self-contained Makefile include that lets you build the **same targets under many different flag sets**—debug vs release, ASan vs UBSan, GCC vs Clang, etc.—without the usual “object-file soup.”
+It hashes every combination of `CC/CXX`, `CFLAGS/CXXFLAGS`, `CPPFLAGS`, `LDFLAGS` and `LDLIBS` into a **dedicated cache directory**, so objects compiled with one configuration are never reused by another. Swap flags, rebuild, swap back—previous objects are still there and never collide.
+
+---
+
+## Key Benefits
+
+| Why it matters | What multiconf.make does |
+| --- | --- |
+| **Isolated configs** | Stores objects into `cachedObjs/<hash>/`, one directory per unique flag set. |
+| **Fast switching** | Reusing an old config is instant—link only, no recompilation. |
+| **Header deps** | Edits to headers trigger only needed rebuilds. |
+| **One-liner targets** | Macros (`c_program`, `cxx_program`, …) hide all rule boilerplate. |
+| **Parallel-ready** | Safe with `make -j`, no duplicate compiles of shared sources. |
+
+---
+
+## Quick Start
+
+### 1 · List your sources
+
+```make
+C_SRCDIRS   := src src/cdeps    # all .c are in these directories
+CXX_SRCDIRS := src src/cxxdeps  # all .cpp are in these directories
+```
+
+### 2 · Add and include
+
+```make
+# root/Makefile
+include multiconf.make
+```
+
+### 3 · Declare targets
+
+```make
+app:
+$(eval $(call c_program,app,app.o obj1.o obj2.o))
+test:
+$(eval $(call cxx_program,test, test.o objcxx1.o objcxx2.o))
+```
+
+### 4 · Build any config you like
+
+```sh
+# Release with GCC
+make CFLAGS="-O3"
+
+# Debug with Clang + AddressSanitizer (new cache dir)
+make CC=clang CFLAGS="-g -O0 -fsanitize=address"
+
+# Switch back to GCC release (objects still valid, relink only)
+make CFLAGS="-O3"
+```
+
+Objects for each command live in different sub-folders; nothing overlaps.
+
+---
+
+## Additional capabilities
+
+| Command | Description |
+| --- | --- |
+| `make clean_cache` | Wipe **all** cached objects & deps (full rebuild next time) |
+| `V=1` | Show full compile/link commands |
+
+---

build/make/lz4defs.make

@@ -37,6 +37,15 @@ ifeq ($(TARGET_OS),)
   TARGET_OS ?= $(OS)
 endif
 
+# Default to parallel builds for the top-level invocation unless a -j flag is
+# already provided. Recursive makes inherit the jobserver from the parent.
+ifeq ($(MAKELEVEL),0)
+ifeq (,$(filter -j%,$(MAKEFLAGS)))
+NPROC ?= $(shell nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
+MAKEFLAGS += -j$(NPROC)
+endif
+endif
+
 ifneq (,$(filter Windows%,$(TARGET_OS)))
 LIBLZ4_NAME = liblz4-$(LIBVER_MAJOR)
 LIBLZ4_EXP  = liblz4.lib
@@ -66,6 +75,7 @@ endif
 ifeq ($(WINBASED),yes)
 EXT        = .exe
 WINDRES ?= windres
+LDFLAGS += -Wl,--force-exe-suffix
 endif
 
 LIBLZ4      = $(LIBLZ4_NAME).$(SHARED_EXT_VER)
@@ -81,7 +91,7 @@ VOID  := /dev/null
   endif
 endif
 
-ifneq (,$(filter Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku MidnightBSD MINGW% CYGWIN% MSYS%,$(shell $(UNAME))))
+ifneq (,$(filter Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku MidnightBSD MINGW% CYGWIN% MSYS% AIX,$(shell $(UNAME))))
 POSIX_ENV = Yes
 else
 POSIX_ENV = No
@@ -110,4 +120,4 @@ endif
 
 INSTALL_PROGRAM ?= $(INSTALL) -m 755
 INSTALL_DATA    ?= $(INSTALL) -m 644
-INSTALL_DIR     ?= $(INSTALL) -d -m 755
+MAKE_DIR        ?= $(INSTALL) -d -m 755

build/make/multiconf.make

@@ -0,0 +1,258 @@
+# ##########################################################################
+# multiconf.make
+# Copyright (C) Yann Collet
+#
+# GPL v2 License
+#
+# 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 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, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# ##########################################################################
+
+
+# Provides c_program(_shared_o) and cxx_program(_shared_o) target generation macros
+# Provides static_library and c_dynamic_library target generation macros
+# Support recompilation of only impacted units when an associated *.h is updated.
+# Provides V=1 / VERBOSE=1 support. V=2 is used for debugging purposes.
+# Complement target clean: delete objects and binaries created by this script
+
+# Requires:
+# - C_SRCDIRS, CXX_SRCDIRS, ASM_SRCDIRS defined
+#   OR
+#   C_SRCS, CXX_SRCS and ASM_SRCS variables defined
+#   *and* vpath set to find all source files
+#   OR
+#   C_OBJS, CXX_OBJS and ASM_OBJS variables defined
+#   *and* vpath set to find all source files
+# - directory `cachedObjs/` available to cache object files.
+#   alternatively: set CACHE_ROOT to some different value.
+# Optional:
+# - HASH can be set to a different custom hash program.
+
+# *_program*: generates a recipe for a target that will be built in a cache directory.
+# The cache directory is automatically derived from CACHE_ROOT and list of flags and compilers.
+# *_shared_o* variants are optional optimization variants, that share the same objects across multiple targets.
+# However, as a consequence, all these objects must have exactly the same list of flags,
+# which in practice means that there must be no target-level modification (like: target: CFLAGS += someFlag).
+# If unsure, only use the standard variants, c_program and cxx_program.
+
+# All *_program* macro functions take up to 4 argument:
+# - The name of the target
+# - The list of object files to build in the cache directory
+# - An optional list of dependencies for linking, that will not be built
+# - An optional complementary recipe code, that will run after compilation and link
+
+
+# Silent mode is default; use V = 1 or VERBOSE = 1 to see compilation lines
+VERBOSE ?= $(V)
+$(VERBOSE).SILENT:
+
+# Directory where object files will be built
+CACHE_ROOT ?= cachedObjs
+
+# --------------------------------------------------------------------------------------------
+
+# Dependency management
+DEPFLAGS = -MT $@ -MMD -MP -MF
+
+# Include dependency files
+include $(wildcard $(CACHE_ROOT)/**/*.d)
+include $(wildcard $(CACHE_ROOT)/generic/*/*.d)
+
+# --------------------------------------------------------------------------------------------
+
+# Automatic determination of build artifacts cache directory, keyed on build
+# flags, so that we can do incremental, parallel builds of different binaries
+# with different build flags without collisions.
+
+UNAME ?= $(shell uname)
+ifeq ($(UNAME), Darwin)
+  HASH ?= md5
+else ifeq ($(UNAME), FreeBSD)
+  HASH ?= gmd5sum
+else ifeq ($(UNAME), OpenBSD)
+  HASH ?= md5
+endif
+HASH ?= md5sum
+
+HAVE_HASH := $(shell echo 1 | $(HASH) > /dev/null && echo 1 || echo 0)
+ifeq ($(HAVE_HASH),0)
+  $(info warning : could not find HASH ($(HASH)), required to differentiate builds using different flags)
+  HASH_FUNC = generic/$(1)
+else
+  HASH_FUNC = $(firstword $(shell echo $(2) | $(HASH) ))
+endif
+
+
+MKDIR ?= mkdir
+LN ?= ln
+
+# --------------------------------------------------------------------------------------------
+# The following macros are used to create object files in the cache directory.
+# The object files are named after the source file, but with a different path.
+
+# Create build directories on-demand.
+#
+# For some reason, make treats the directory as an intermediate file and tries
+# to delete it. So we work around that by marking it "precious". Solution found
+# here:
+# http://ismail.badawi.io/blog/2017/03/28/automatic-directory-creation-in-make/
+.PRECIOUS: $(CACHE_ROOT)/%/.
+$(CACHE_ROOT)/%/. :
+	$(MKDIR) -p $@
+
+
+define addTargetAsmObject  # targetName, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2))))
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.S) $(2) | $$(CACHE_ROOT)/%/.
+	@echo AS $$@
+	$$(CC) $$(CPPFLAGS) $$(CXXFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetAsmObject
+
+define addTargetCObject  # targetName, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2)))) #debug print
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.c) $(2) | $$(CACHE_ROOT)/%/.
+	@echo CC $$@
+	$$(CC) $$(CPPFLAGS) $$(CFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetCObject
+
+define addTargetCxxObject  # targetName, suffix, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3))))
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.$(2)) $(3) | $$(CACHE_ROOT)/%/.
+	@echo CXX $$@
+	$$(CXX) $$(CPPFLAGS) $$(CXXFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetCxxObject
+
+# Create targets for individual object files
+C_SRCDIRS += .
+vpath %.c $(C_SRCDIRS)
+CXX_SRCDIRS += .
+vpath %.cpp $(CXX_SRCDIRS)
+vpath %.cc $(CXX_SRCDIRS)
+ASM_SRCDIRS += .
+vpath %.S $(ASM_SRCDIRS)
+
+# If C_SRCDIRS, CXX_SRCDIRS and ASM_SRCDIRS are not defined, use C_SRCS, CXX_SRCS and ASM_SRCS
+C_SRCS   ?= $(notdir $(foreach dir,$(C_SRCDIRS),$(wildcard $(dir)/*.c)))
+CPP_SRCS ?= $(notdir $(foreach dir,$(CXX_SRCDIRS),$(wildcard $(dir)/*.cpp)))
+CC_SRCS  ?= $(notdir $(foreach dir,$(CXX_SRCDIRS),$(wildcard $(dir)/*.cc)))
+CXX_SRCS ?= $(CPP_SRCS) $(CC_SRCS)
+ASM_SRCS ?= $(notdir $(foreach dir,$(ASM_SRCDIRS),$(wildcard $(dir)/*.S)))
+
+# If C_SRCS, CXX_SRCS and ASM_SRCS are not defined, use C_OBJS, CXX_OBJS and ASM_OBJS
+C_OBJS   ?= $(patsubst %.c,%.o,$(C_SRCS))
+CPP_OBJS ?= $(patsubst %.cpp,%.o,$(CPP_SRCS))
+CC_OBJS  ?= $(patsubst %.cc,%.o,$(CC_SRCS))
+CXX_OBJS ?= $(CPP_OBJS) $(CC_OBJS) # Note: not used
+ASM_OBJS ?= $(patsubst %.S,%.o,$(ASM_SRCS))
+
+$(foreach OBJ,$(C_OBJS),$(eval $(call addTargetCObject,$(OBJ))))
+$(foreach OBJ,$(CPP_OBJS),$(eval $(call addTargetCxxObject,$(OBJ),cpp)))
+$(foreach OBJ,$(CC_OBJS),$(eval $(call addTargetCxxObject,$(OBJ),cc)))
+$(foreach OBJ,$(ASM_OBJS),$(eval $(call addTargetAsmObject,$(OBJ))))
+
+# --------------------------------------------------------------------------------------------
+# The following macros are used to create targets in the user Makefile.
+# Binaries are built in the cache directory, and then symlinked to the current directory.
+# The cache directory is automatically derived from CACHE_ROOT and list of flags and compilers.
+
+define static_library  # targetName, targetDeps, addlDeps, addRecipe, hashComplement
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo AR $$@
+	$$(AR) $$(ARFLAGS) $$@ $$^
+	$(4)
+
+.PHONY: $(1)
+$(1) : ARFLAGS = rcs
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$(2) $$(CPPFLAGS) $$(CC) $$(CFLAGS) $$(CXX) $$(CXXFLAGS) $$(AR) $$(ARFLAGS) $(5))/$(1)
+	$$(LN) -sf $$< $$@
+
+endef # static_library
+
+
+define c_dynamic_library  # targetName, targetDeps, addlDeps, addRecipe, hashComplement
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo LD $$@
+	$$(CC) $$(CPPFLAGS) $$(CFLAGS) $$(LDFLAGS) -shared -o $$@ $$^ $$(LDLIBS)
+	$(4)
+
+.PHONY: $(1)
+$(1) : CFLAGS += -fPIC
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$(2) $$(CPPFLAGS) $$(CC) $$(CFLAGS) $$(LDFLAGS) $$(LDLIBS) $(5))/$(1)
+	$$(LN) -sf $$< $$@
+
+endef # c_dynamic_library
+
+
+define program_base  # targetName, targetDeps, addlDeps, addRecipe, hashComplement, compiler, flags
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5),$(6),$(7))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo LD $$@
+	$$($(6)) $$(CPPFLAGS) $$($(7)) $$^ -o $$@ $$(LDFLAGS) $$(LDLIBS)
+	$(4)
+
+.PHONY: $(1)
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$$($(6)) $$(CPPFLAGS) $$($(7)) $$(LDFLAGS) $$(LDLIBS) $(5))/$(1)
+	$$(LN) -sf $$< $$@$(EXT)
+
+endef # program_base
+# Note: $(EXT) must be set to .exe for Windows
+
+define c_program  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),$(1)$(2),CC,CFLAGS))
+endef # c_program
+
+define c_program_shared_o  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),,CC,CFLAGS))
+endef # c_program_shared_o
+
+define cxx_program  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),$(1)$(2),CXX,CXXFLAGS))
+endef # cxx_program
+
+define cxx_program_shared_o  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),,CXX,CXXFLAGS))
+endef # cxx_program_shared_o
+
+# --------------------------------------------------------------------------------------------
+
+# Cleaning: delete all objects and binaries created with this script
+.PHONY: clean_cache
+clean_cache:
+	$(RM) -rf $(CACHE_ROOT)
+	$(RM) $(MCM_ALL_BINS)
+
+# automatically attach to standard clean target
+.PHONY: clean
+clean: clean_cache

build/meson/GetLz4LibraryVersion.py

@@ -15,9 +15,9 @@ def find_version_tuple(filepath):
   with open(filepath) as fd:
     version_file_data = fd.read()
 
-  patterns = r"""#\s*define\s+LZ4_VERSION_MAJOR\s+([0-9]+).*$
-#\s*define\s+LZ4_VERSION_MINOR\s+([0-9]+).*$
-#\s*define\s+LZ4_VERSION_RELEASE\s+([0-9]+).*$
+  patterns = r"""\s*#\s*define\s+LZ4_VERSION_MAJOR\s+([0-9]+).*$
+\s*#\s*define\s+LZ4_VERSION_MINOR\s+([0-9]+).*$
+\s*#\s*define\s+LZ4_VERSION_RELEASE\s+([0-9]+).*$
 """
   regex = re.compile(patterns, re.MULTILINE)
   version_match = regex.search(version_file_data)

build/meson/README.md

@@ -10,7 +10,7 @@ This Meson build system is provided with no guarantee.
 
 ## How to build
 
-`cd` to this meson directory (`contrib/meson`)
+`cd` to this meson directory (`build/meson`)
 
 ```sh
 meson setup --buildtype=release -Ddefault_library=shared -Dprograms=true builddir

build/meson/meson.build

@@ -16,7 +16,6 @@ project(
   'c',
   license: 'BSD-2-Clause-Patent AND GPL-2.0-or-later',
   default_options: [
-    'c_std=c99',
     'buildtype=release',
     'warning_level=3'
   ],

build/meson/meson/examples/meson.build

@@ -11,15 +11,15 @@
 lz4_source_root = '../../../..'
 
 examples = {
-  'printVersion': 'printVersion.c',
-  'doubleBuffer': 'blockStreaming_doubleBuffer.c',
+  'print_version': 'print_version.c',
+  'blockStreaming_doubleBuffer': 'blockStreaming_doubleBuffer.c',
   'dictionaryRandomAccess': 'dictionaryRandomAccess.c',
-  'ringBuffer': 'blockStreaming_ringBuffer.c',
-  'ringBufferHC': 'HCStreaming_ringBuffer.c',
-  'lineCompress': 'blockStreaming_lineByLine.c',
+  'blockStreaming_ringBuffer': 'blockStreaming_ringBuffer.c',
+  'streamingHC_ringBuffer': 'streamingHC_ringBuffer.c',
+  'blockStreaming_lineByLine': 'blockStreaming_lineByLine.c',
   'frameCompress': 'frameCompress.c',
-  'compressFunctions': 'compress_functions.c',
-  'simpleBuffer': 'simple_buffer.c',
+  'bench_functions': 'bench_functions.c',
+  'simple_buffer': 'simple_buffer.c',
 }
 
 foreach e, src : examples

build/meson/meson/meson.build

@@ -81,6 +81,15 @@ if get_option('memory-usage') > 0
   compile_args += '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage'))
 endif
 
+if get_option('endianness-independent-output')
+  if get_option('default_library') != 'static'
+    error('Endianness-independent output can only be enabled in static builds')
+  endif
+
+  add_project_arguments('-DLZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT')
+  compile_args += '-DLZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT'
+endif
+
 if get_option('unstable')
   add_project_arguments('-DLZ4_STATIC_LINKING_ONLY', language: 'c')
   compile_args += '-DLZ4_STATIC_LINKING_ONLY'

build/meson/meson/ossfuzz/meson.build

@@ -1,3 +1,5 @@
+lz4_source_root = '../../../..'
+
 fuzzers = [
   'compress_frame_fuzzer',
   'compress_fuzzer',

build/meson/meson/programs/meson.build

@@ -10,18 +10,35 @@
 
 lz4_source_root = '../../../..'
 
+# note:
+# it would be preferable to use some kind of glob or wildcard expansion here...
 sources = files(
   lz4_source_root / 'programs/bench.c',
-  lz4_source_root / 'programs/datagen.c',
+  lz4_source_root / 'programs/lorem.c',
   lz4_source_root / 'programs/lz4cli.c',
   lz4_source_root / 'programs/lz4io.c',
+  lz4_source_root / 'programs/util.c',
+  lz4_source_root / 'programs/threadpool.c',
+  lz4_source_root / 'programs/timefn.c',
 )
 
+# Initialize an empty list for extra dependencies
+extra_deps = []
+
+if get_option('enable_multithread')
+  pthread_dep = dependency('threads', required : true)
+  extra_deps += [pthread_dep]
+  multithread_args = ['-DLZ4IO_MULTITHREAD']
+else
+  multithread_args = []
+endif
+
 lz4 = executable(
   'lz4',
   sources,
   include_directories: include_directories(lz4_source_root / 'programs'),
-  dependencies: [liblz4_internal_dep],
+  dependencies: [liblz4_internal_dep] + extra_deps,
+  c_args: multithread_args,
   export_dynamic: get_option('debug') and host_machine.system() == 'windows',
   install: true
 )
@@ -32,8 +49,8 @@ lz4cat = custom_target(
   output: 'lz4cat',
   command: [
     'ln',
-    '--symbolic',
-    '--force',
+    '-s',
+    '-f',
     fs.name(lz4.full_path()),
     '@OUTPUT@'
   ]
@@ -45,8 +62,8 @@ unlz4 = custom_target(
   output: 'unlz4',
   command: [
     'ln',
-    '--symbolic',
-    '--force',
+    '-s',
+    '-f',
     fs.name(lz4.full_path()),
     '@OUTPUT@'
   ]

build/meson/meson/tests/meson.build

@@ -25,8 +25,12 @@ test_exes = {
     'test': false,
   },
   'datagen': {
-    'sources': files(lz4_source_root / 'tests/datagencli.c'),
-    'objects': lz4.extract_objects(lz4_source_root / 'programs/datagen.c'),
+    'sources': files(
+        lz4_source_root / 'programs/lorem.c',
+        lz4_source_root / 'tests/datagencli.c',
+        lz4_source_root / 'tests/datagen.c',
+        lz4_source_root / 'tests/loremOut.c',
+        ),
     'include_directories': include_directories(lz4_source_root / 'programs'),
   },
   'decompress-partial-usingDict.c': {
@@ -36,14 +40,17 @@ test_exes = {
     'sources': files(lz4_source_root / 'tests/decompress-partial.c'),
   },
   'frametest': {
-    'sources': files(lz4_source_root / 'tests/frametest.c'),
+    'sources': files(
+      lz4_source_root / 'tests/frametest.c',
+      lz4_source_root / 'lib/lz4file.c',
+    ),
     'include_directories': include_directories(lz4_source_root / 'programs'),
     'args': ['-v', '-T@0@s'.format(fuzzer_time)],
     'test': false,
   },
   'freestanding': {
     'sources': files(lz4_source_root / 'tests/freestanding.c'),
-    'c_args': ['-ffreestanding', '-Wno-unused-parameter', '-Wno-declaration-after-statement'],
+    'c_args': ['-ffreestanding', '-fno-stack-protector', '-Wno-unused-parameter', '-Wno-declaration-after-statement', '-DLZ4_DEBUG=0'],
     'link_args': ['-nostdlib'],
     'build': cc.get_id() in ['gcc', 'clang'] and
       host_machine.system() == 'linux' and host_machine.cpu_family() == 'x86_64',

build/meson/meson_options.txt

@@ -8,6 +8,8 @@
 # in the COPYING file in the root directory of this source tree).
 # #############################################################################
 
+option('enable_multithread', type: 'boolean', value: true,
+  description: 'Enable multi-threading support')
 option('align-test', type: 'boolean', value: true,
   description: 'See LZ4_ALIGN_TEST')
 option('contrib', type: 'boolean', value: false,
@@ -18,6 +20,8 @@ option('disable-memory-allocation', type: 'boolean', value: false,
   description: 'See LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION. Static builds only')
 option('distance-max', type: 'integer', min: 0, max: 65535, value: 65535,
   description: 'See LZ4_DISTANCE_MAX')
+option('endianness-independent-output', type: 'boolean', value: false,
+  description: 'See LZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT. Static builds only')
 option('examples', type: 'boolean', value: false,
   description: 'Enable examples')
 option('fast-dec-loop', type: 'feature', value: 'auto',

build/visual/README.md

@@ -0,0 +1,5 @@
+These scripts will generate Visual Studio Solutions for a selected set of supported versions of MS Visual.
+
+For these scripts to work, both `cmake` and the relevant Visual Studio version must be locally installed on the system where the script is run.
+
+If `cmake` is installed into a non-standard directory, or user wants to test a specific version of `cmake`, the target `cmake` directory can be provided via the environment variable `CMAKE_PATH`.

build/visual/generate_solution.cmd

@@ -0,0 +1,55 @@
+:: Requires 1 parameter == GENERATOR
+@echo off
+setlocal
+
+:: Set path
+set "BUILD_BASE_DIR=%~dp0"  :: Use the directory where the script is located
+set "CMAKELIST_DIR=..\..\cmake"
+
+if "%~1"=="" (
+    echo No generator specified as first parameter
+    exit /b 1
+)
+set "GENERATOR=%~1"
+
+:: Check if a user-defined CMAKE_PATH is set and prioritize it
+if defined CMAKE_PATH (
+    set "CMAKE_EXECUTABLE=%CMAKE_PATH%\cmake.exe"
+    echo Using user-defined cmake at %CMAKE_PATH%
+) else (
+    :: Attempt to find cmake in the system PATH
+    where cmake >nul 2>&1
+    if %ERRORLEVEL% neq 0 (
+        :: Use the default standard cmake installation directory if not found in PATH
+        set "CMAKE_PATH=C:\Program Files\CMake\bin"
+        echo CMake not in system PATH => using default CMAKE_PATH=%CMAKE_PATH%
+        set "CMAKE_EXECUTABLE=%CMAKE_PATH%\cmake.exe"
+    ) else (
+        set "CMAKE_EXECUTABLE=cmake"
+        echo CMake found in system PATH.
+    )
+)
+
+:: Set the build directory to a subdirectory named after the generator
+set "BUILD_DIR=%BUILD_BASE_DIR%\%GENERATOR%"
+
+:: Create the build directory if it doesn't exist
+if not exist "%BUILD_DIR%" mkdir "%BUILD_DIR%"
+
+:: Run CMake to configure the project and generate the solution
+pushd "%BUILD_DIR%"
+"%CMAKE_EXECUTABLE%" -G "%GENERATOR%" "%CMAKELIST_DIR%"
+if %ERRORLEVEL% neq 0 goto :error
+
+:: If successful, end script
+echo Build configuration successful for %GENERATOR%.
+goto :end
+
+:error
+echo Failed to configure build for %GENERATOR%.
+exit /b 1
+
+:end
+popd
+endlocal
+@echo on

build/visual/generate_vs2015.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2015
+call generate_solution.cmd "Visual Studio 14 2015"

build/visual/generate_vs2017.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2017
+call generate_solution.cmd "Visual Studio 15 2017"

build/visual/generate_vs2019.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2019
+call generate_solution.cmd "Visual Studio 16 2019"

build/visual/generate_vs2022.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2022
+call generate_solution.cmd "Visual Studio 17 2022"

contrib/debian/changelog

@@ -1,10 +0,0 @@
-liblz4 (1.7.2) unstable; urgency=low
-
-  * Changed : moved to versioning; package, cli and library have same version number
-  * Improved: Small decompression speed boost (+4%)
-  * Improved: Performance on ARMv6 and ARMv7
-  * Added : Debianization, by Evgeniy Polyakov
-  * Makefile: Generates object files (*.o) for faster (re)compilation on low power systems
-  * Fix : cli : crash on some invalid inputs
-
- -- Yann Collet <Cyan4973@github.com>  Sun, 28 Jun 2015 01:00:00 +0000

contrib/debian/compat

@@ -1 +0,0 @@
-7

contrib/debian/control

@@ -1,23 +0,0 @@
-Source: liblz4
-Section: devel
-Priority: optional
-Maintainer: Evgeniy Polyakov <zbr@ioremap.net>
-Build-Depends:
- cmake (>= 2.6),
- debhelper (>= 7.0.50~),
- cdbs
-Standards-Version: 3.8.0
-Homepage: http://www.lz4.org/
-Vcs-Git: git://github.com/lz4/lz4.git
-Vcs-Browser: https://github.com/lz4/lz4
-
-Package: liblz4
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Extremely Fast Compression algorithm http://www.lz4.org
-
-Package: liblz4-dev
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Extremely Fast Compression algorithm http://www.lz4.org
- Development files.

contrib/debian/copyright

@@ -1,9 +0,0 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: liblz4
-Upstream-Contact: Yann Collet <Cyan4973@github.com>
-Source: https://github.com/lz4/lz4
-
-Files: *
-Copyright: (C) 2011-2020 Yann Collet
-License: GPL-2+
- The full text of license: https://github.com/lz4/lz4/blob/dev/lib/LICENSE

contrib/debian/dirs

@@ -1 +0,0 @@
-usr/bin

contrib/debian/liblz4-dev.install

@@ -1,2 +0,0 @@
-usr/include/lz4*
-usr/lib/liblz4.so

contrib/debian/liblz4.install

@@ -1,2 +0,0 @@
-usr/lib/liblz4.so.*
-usr/bin/*

contrib/debian/rules

@@ -1,7 +0,0 @@
-#!/usr/bin/make -f
-
-include /usr/share/cdbs/1/rules/debhelper.mk
-include /usr/share/cdbs/1/class/cmake.mk
-
-
-DEB_CMAKE_EXTRA_FLAGS := -DCMAKE_BUILD_TYPE=RelWithDebInfo ../../build/cmake

contrib/djgpp/Makefile

@@ -7,9 +7,9 @@ DESTDIR ?= /opt/local
 # Version numbers
 VERSION ?= 129
 RELEASE ?= r$(VERSION)
-LIBVER_MAJOR=$(shell sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
-LIBVER_MINOR=$(shell sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
-LIBVER_PATCH=$(shell sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_MAJOR=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_MINOR=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_PATCH=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
 LIBVER=$(LIBVER_MAJOR).$(LIBVER_MINOR).$(LIBVER_PATCH)
 
 ######################################################################
@@ -19,7 +19,7 @@ CC = $(CROSS)-gcc
 AR = $(CROSS)-ar
 LD = $(CROSS)-gcc
 
-CFLAGS ?= -O3 -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -pedantic -DLZ4_VERSION=\"$(RELEASE)\"
+CFLAGS ?= -O3 -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -Wpedantic -DLZ4_VERSION=\"$(RELEASE)\"
 LDFLAGS ?= -s
 SRC = programs/bench.c programs/lz4io.c programs/lz4cli.c
 OBJ = $(SRC:.c=.o)

contrib/gen_manual/Makefile

@@ -39,9 +39,9 @@ LZ4API = ../../lib/lz4.h
 LZ4MANUAL = ../../doc/lz4_manual.html
 LZ4FAPI = ../../lib/lz4frame.h
 LZ4FMANUAL = ../../doc/lz4frame_manual.html
-LIBVER_MAJOR_SCRIPT:=`sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
-LIBVER_MINOR_SCRIPT:=`sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
-LIBVER_PATCH_SCRIPT:=`sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_MAJOR_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_MINOR_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_PATCH_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
 LIBVER_SCRIPT:= $(LIBVER_MAJOR_SCRIPT).$(LIBVER_MINOR_SCRIPT).$(LIBVER_PATCH_SCRIPT)
 LZ4VER := $(shell echo $(LIBVER_SCRIPT))
 

contrib/gen_manual/gen-lz4-manual.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 
-LIBVER_MAJOR_SCRIPT=`sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
-LIBVER_MINOR_SCRIPT=`sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
-LIBVER_PATCH_SCRIPT=`sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_MAJOR_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_MINOR_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_PATCH_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
 LIBVER_SCRIPT=$LIBVER_MAJOR_SCRIPT.$LIBVER_MINOR_SCRIPT.$LIBVER_PATCH_SCRIPT
 
 echo LZ4_VERSION=$LIBVER_SCRIPT

doc/lz4_Frame_format.md

@@ -16,7 +16,7 @@ Distribution of this document is unlimited.
 
 ### Version
 
-1.6.3 (12/09/2022)
+1.6.4 (28/12/2023)
 
 
 Introduction
@@ -219,24 +219,26 @@ It can be skipped by a decoder, or used to validate content correctness.
 
 __Dictionary ID__
 
+A dictionary is useful to compress short input sequences.
+When present, the compressor can take advantage of dictionary's content
+as a kind of “known prefix” to encode the input in a more compact manner.
+
+When the frame descriptor defines independent blocks,
+every block is initialized with the same dictionary.
+If the frame descriptor defines linked blocks,
+the dictionary is only used once, at the beginning of the frame.
+
+The compressor and the decompressor must employ exactly the same dictionary for the data to be decodable.
+
+The Dict-ID field is offered as a way to help the decoder determine
+which dictionary must be used to correctly decode the compressed frame.
 Dict-ID is only present if the associated flag is set.
 It's an unsigned 32-bits value, stored using little-endian convention.
-A dictionary is useful to compress short input sequences.
-The compressor can take advantage of the dictionary context
-to encode the input in a more compact manner.
-It works as a kind of “known prefix” which is used by
-both the compressor and the decompressor to “warm-up” reference tables.
+Within a single frame, only a single Dict-ID field can be defined.
 
-The decompressor can use Dict-ID identifier to determine
-which dictionary must be used to correctly decode data.
-The compressor and the decompressor must use exactly the same dictionary.
-It's presumed that the 32-bits dictID uniquely identifies a dictionary.
-
-Within a single frame, a single dictionary can be defined.
-When the frame descriptor defines independent blocks,
-each block will be initialized with the same dictionary.
-If the frame descriptor defines linked blocks,
-the dictionary will only be used once, at the beginning of the frame.
+Note that the Dict-ID field is optional.
+Knowledge of which dictionary to employ can also be passed off-band,
+for example, it could be implied by the context of the application.
 
 __Header Checksum__
 
@@ -356,7 +358,9 @@ Main characteristics of the legacy format :
 - All blocks are always compressed, even when compression is detrimental.
 - The last block is detected either because
   it is followed by the “EOF” (End of File) mark,
-  or because it is followed by a known Frame Magic Number.
+  or because it is followed by a known Frame Magic Number.<br>
+  In the Linux Kernel implementation, it can also be detected because it
+  is followed by a sequence of four zero bytes.
 - No checksum
 - Convention is Little endian
 
@@ -397,6 +401,8 @@ and trigger an error if it does not fit within acceptable range.
 Version changes
 ---------------
 
+1.6.4 : minor clarifications for Dictionaries
+
 1.6.3 : minor : clarify Data Block
 
 1.6.2 : clarifies specification of _EndMark_
@@ -429,6 +435,6 @@ Version changes
 
 0.6 : settled : stream size uses 8 bytes, endian convention is little endian
 
-0.5: added copyright notice
+0.5 : added copyright notice
 
 0.4 : changed format to Google Doc compatible OpenDocument

doc/lz4_manual.html

@@ -1,16 +1,16 @@
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
-<title>1.9.4 Manual</title>
+<title>1.10.0 Manual</title>
 </head>
 <body>
-<h1>1.9.4 Manual</h1>
+<h1>1.10.0 Manual</h1>
 <hr>
 <a name="Contents"></a><h2>Contents</h2>
 <ol>
 <li><a href="#Chapter1">Introduction</a></li>
 <li><a href="#Chapter2">Version</a></li>
-<li><a href="#Chapter3">Tuning parameter</a></li>
+<li><a href="#Chapter3">Tuning memory usage</a></li>
 <li><a href="#Chapter4">Simple Functions</a></li>
 <li><a href="#Chapter5">Advanced Functions</a></li>
 <li><a href="#Chapter6">Streaming Compression Functions</a></li>
@@ -83,15 +83,16 @@
 </b></pre><BR>
 <pre><b>const char* LZ4_versionString (void);   </b>/**< library version string; useful to check dll version; requires v1.7.5+ */<b>
 </b></pre><BR>
-<a name="Chapter3"></a><h2>Tuning parameter</h2><pre></pre>
+<a name="Chapter3"></a><h2>Tuning memory usage</h2><pre></pre>
 
 <pre><b>#ifndef LZ4_MEMORY_USAGE
 # define LZ4_MEMORY_USAGE LZ4_MEMORY_USAGE_DEFAULT
 #endif
-</b><p> Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; )
- Increasing memory usage improves compression ratio, at the cost of speed.
+</b><p> Can be selected at compile time, by setting LZ4_MEMORY_USAGE.
+ Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB)
+ Increasing memory usage improves compression ratio, generally at the cost of speed.
  Reduced memory usage may improve speed at the cost of ratio, thanks to better cache locality.
- Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
+ Default value is 14, for 16KB, which nicely fits into most L1 caches.
  
 </p></pre><BR>
 
@@ -114,8 +115,9 @@
 </p></pre><BR>
 
 <pre><b>int LZ4_decompress_safe (const char* src, char* dst, int compressedSize, int dstCapacity);
-</b><p>  compressedSize : is the exact complete size of the compressed block.
-  dstCapacity : is the size of destination buffer (which must be already allocated), presumed an upper bound of decompressed size.
+</b><p> @compressedSize : is the exact complete size of the compressed block.
+ @dstCapacity : is the size of destination buffer (which must be already allocated),
+                presumed an upper bound of decompressed size.
  @return : the number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
            If destination buffer is not large enough, decoding will stop and output an error code (negative value).
            If the source stream is detected malformed, the function will stop decoding and return a negative result.
@@ -159,22 +161,25 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
  
 </p></pre><BR>
 
-<pre><b>int LZ4_compress_destSize (const char* src, char* dst, int* srcSizePtr, int targetDstSize);
+<pre><b>int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targetDstSize);
 </b><p>  Reverse the logic : compresses as much data as possible from 'src' buffer
-  into already allocated buffer 'dst', of size >= 'targetDestSize'.
+  into already allocated buffer 'dst', of size >= 'dstCapacity'.
   This function either compresses the entire 'src' content into 'dst' if it's large enough,
   or fill 'dst' buffer completely with as much data as possible from 'src'.
   note: acceleration parameter is fixed to "default".
 
- *srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
+ *srcSizePtr : in+out parameter. Initially contains size of input.
+               Will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
                New value is necessarily <= input value.
- @return : Nb bytes written into 'dst' (necessarily <= targetDestSize)
+ @return : Nb bytes written into 'dst' (necessarily <= dstCapacity)
            or 0 if compression fails.
 
- Note : from v1.8.2 to v1.9.1, this function had a bug (fixed un v1.9.2+):
-        the produced compressed content could, in specific circumstances,
-        require to be decompressed into a destination buffer larger
-        by at least 1 byte than the content to decompress.
+ Note : 'targetDstSize' must be >= 1, because it's the smallest valid lz4 payload.
+
+ Note 2:from v1.8.2 to v1.9.1, this function had a bug (fixed in v1.9.2+):
+        the produced compressed content could, in rare circumstances,
+        require to be decompressed into a destination buffer
+        larger by at least 1 byte than decompressesSize.
         If an application uses `LZ4_compress_destSize()`,
         it's highly recommended to update liblz4 to v1.9.2 or better.
         If this can't be done or ensured,
@@ -222,6 +227,24 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
 
 <a name="Chapter6"></a><h2>Streaming Compression Functions</h2><pre></pre>
 
+<pre><b>#if !defined(RC_INVOKED) </b>/* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */<b>
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+LZ4_stream_t* LZ4_createStream(void);
+int           LZ4_freeStream (LZ4_stream_t* streamPtr);
+#endif </b>/* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */<b>
+#endif
+</b><p>
+ - RC_INVOKED is predefined symbol of rc.exe (the resource compiler which is part of MSVC/Visual Studio).
+   https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros
+
+ - Since rc.exe is a legacy compiler, it truncates long symbol (> 30 chars)
+   and reports warning "RC4011: identifier truncated".
+
+ - To eliminate the warning, we surround long preprocessor symbol with
+   "#if !defined(RC_INVOKED) ... #endif" block that means
+   "skip this block when rc.exe is trying to read it".
+</p></pre><BR>
+
 <pre><b>void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
 </b><p>  Use this to prepare an LZ4_stream_t for a new chain of dependent blocks
   (e.g., LZ4_compress_fast_continue()).
@@ -252,10 +275,55 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
   LZ4_loadDict() triggers a reset, so any previous data will be forgotten.
   The same dictionary will have to be loaded on decompression side for successful decoding.
   Dictionary are useful for better compression of small data (KB range).
-  While LZ4 accept any input as dictionary,
-  results are generally better when using Zstandard's Dictionary Builder.
+  While LZ4 itself accepts any input as dictionary, dictionary efficiency is also a topic.
+  When in doubt, employ the Zstandard's Dictionary Builder.
   Loading a size of 0 is allowed, and is the same as reset.
- @return : loaded dictionary size, in bytes (necessarily <= 64 KB)
+ @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
+ 
+</p></pre><BR>
+
+<pre><b>int LZ4_loadDictSlow(LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
+</b><p>  Same as LZ4_loadDict(),
+  but uses a bit more cpu to reference the dictionary content more thoroughly.
+  This is expected to slightly improve compression ratio.
+  The extra-cpu cost is likely worth it if the dictionary is re-used across multiple sessions.
+ @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
+ 
+</p></pre><BR>
+
+<pre><b>void
+LZ4_attach_dictionary(LZ4_stream_t* workingStream,
+                const LZ4_stream_t* dictionaryStream);
+</b><p>
+  This allows efficient re-use of a static dictionary multiple times.
+
+  Rather than re-loading the dictionary buffer into a working context before
+  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
+  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
+  in which the working stream references @dictionaryStream in-place.
+
+  Several assumptions are made about the state of @dictionaryStream.
+  Currently, only states which have been prepared by LZ4_loadDict() or
+  LZ4_loadDictSlow() should be expected to work.
+
+  Alternatively, the provided @dictionaryStream may be NULL,
+  in which case any existing dictionary stream is unset.
+
+  If a dictionary is provided, it replaces any pre-existing stream history.
+  The dictionary contents are the only history that can be referenced and
+  logically immediately precede the data compressed in the first subsequent
+  compression call.
+
+  The dictionary will only remain attached to the working stream through the
+  first compression call, at the end of which it is cleared.
+ @dictionaryStream stream (and source buffer) must remain in-place / accessible / unchanged
+  through the completion of the compression session.
+
+  Note: there is no equivalent LZ4_attach_*() method on the decompression side
+  because there is no initialization cost, hence no need to share the cost across multiple sessions.
+  To decompress LZ4 blocks using dictionary, attached or not,
+  just employ the regular LZ4_setStreamDecode() for streaming,
+  or the stateless LZ4_decompress_safe_usingDict() for one-shot decompression.
  
 </p></pre><BR>
 
@@ -296,10 +364,12 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
 <a name="Chapter7"></a><h2>Streaming Decompression Functions</h2><pre>  Bufferless synchronous API
 <BR></pre>
 
-<pre><b>#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+<pre><b>#if !defined(RC_INVOKED) </b>/* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */<b>
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
 LZ4_streamDecode_t* LZ4_createStreamDecode(void);
 int                 LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
 #endif </b>/* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */<b>
+#endif
 </b><p>  creation / destruction of streaming decompression tracking context.
   A tracking context can be re-used multiple times.
  
@@ -332,10 +402,23 @@ int                 LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
 LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
                         const char* src, char* dst,
                         int srcSize, int dstCapacity);
-</b><p>  These decoding functions allow decompression of consecutive blocks in "streaming" mode.
-  A block is an unsplittable entity, it must be presented entirely to a decompression function.
-  Decompression functions only accepts one block at a time.
-  The last 64KB of previously decoded data *must* remain available and unmodified at the memory position where they were decoded.
+</b><p>  This decoding function allows decompression of consecutive blocks in "streaming" mode.
+  The difference with the usual independent blocks is that
+  new blocks are allowed to find references into former blocks.
+  A block is an unsplittable entity, and must be presented entirely to the decompression function.
+  LZ4_decompress_safe_continue() only accepts one block at a time.
+  It's modeled after `LZ4_decompress_safe()` and behaves similarly.
+
+ @LZ4_streamDecode : decompression state, tracking the position in memory of past data
+ @compressedSize : exact complete size of one compressed block.
+ @dstCapacity : size of destination buffer (which must be already allocated),
+                must be an upper bound of decompressed size.
+ @return : number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
+           If destination buffer is not large enough, decoding will stop and output an error code (negative value).
+           If the source stream is detected malformed, the function will stop decoding and return a negative result.
+
+  The last 64KB of previously decoded data *must* remain available and unmodified
+  at the memory position where they were previously decoded.
   If less than 64KB of data has been decoded, all the data must be present.
 
   Special : if decompression side sets a ring buffer, it must respect one of the following conditions :
@@ -361,15 +444,27 @@ LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
 LZ4_decompress_safe_usingDict(const char* src, char* dst,
                               int srcSize, int dstCapacity,
                               const char* dictStart, int dictSize);
-</b><p>  These decoding functions work the same as
-  a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
-  They are stand-alone, and don't need an LZ4_streamDecode_t structure.
+</b><p>  Works the same as
+  a combination of LZ4_setStreamDecode() followed by LZ4_decompress_safe_continue()
+  However, it's stateless: it doesn't need any LZ4_streamDecode_t state.
   Dictionary is presumed stable : it must remain accessible and unmodified during decompression.
   Performance tip : Decompression speed can be substantially increased
                     when dst == dictStart + dictSize.
  
 </p></pre><BR>
 
+<pre><b>int
+LZ4_decompress_safe_partial_usingDict(const char* src, char* dst,
+                                      int compressedSize,
+                                      int targetOutputSize, int maxOutputSize,
+                                      const char* dictStart, int dictSize);
+</b><p>  Behaves the same as LZ4_decompress_safe_partial()
+  with the added ability to specify a memory segment for past data.
+  Performance tip : Decompression speed can be substantially increased
+                    when dst == dictStart + dictSize.
+ 
+</p></pre><BR>
+
 <a name="Chapter8"></a><h2>Experimental section</h2><pre>
  Symbols declared in this section must be considered unstable. Their
  signatures or semantics may change, or they may be removed altogether in the
@@ -400,33 +495,9 @@ LZ4_decompress_safe_usingDict(const char* src, char* dst,
  
 </p></pre><BR>
 
-<pre><b>LZ4LIB_STATIC_API void
-LZ4_attach_dictionary(LZ4_stream_t* workingStream,
-                const LZ4_stream_t* dictionaryStream);
-</b><p>  This is an experimental API that allows
-  efficient use of a static dictionary many times.
-
-  Rather than re-loading the dictionary buffer into a working context before
-  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
-  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
-  in which the working stream references the dictionary stream in-place.
-
-  Several assumptions are made about the state of the dictionary stream.
-  Currently, only streams which have been prepared by LZ4_loadDict() should
-  be expected to work.
-
-  Alternatively, the provided dictionaryStream may be NULL,
-  in which case any existing dictionary stream is unset.
-
-  If a dictionary is provided, it replaces any pre-existing stream history.
-  The dictionary contents are the only history that can be referenced and
-  logically immediately precede the data compressed in the first subsequent
-  compression call.
-
-  The dictionary will only remain attached to the working stream through the
-  first compression call, at the end of which it is cleared. The dictionary
-  stream (and source buffer) must remain in-place / accessible / unchanged
-  through the completion of the first compression call on the stream.
+<pre><b>int LZ4_compress_destSize_extState(void* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration);
+</b><p>  Same as LZ4_compress_destSize(), but using an externally allocated state.
+  Also: exposes @acceleration
  
 </p></pre><BR>
 
@@ -496,7 +567,7 @@ LZ4_attach_dictionary(LZ4_stream_t* workingStream,
   If you need static allocation, declare or allocate an LZ4_stream_t object.
 </p></pre><BR>
 
-<pre><b>LZ4_stream_t* LZ4_initStream (void* buffer, size_t size);
+<pre><b>LZ4_stream_t* LZ4_initStream (void* stateBuffer, size_t size);
 </b><p>  An LZ4_stream_t structure must be initialized at least once.
   This is automatically done when invoking LZ4_createStream(),
   but it's not when the structure is simply declared on stack (for example).
@@ -568,11 +639,12 @@ LZ4_DEPRECATED("use LZ4_decompress_safe() instead") LZ4LIB_API int LZ4_uncompres
 LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") LZ4LIB_API int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
 </b><p></p></pre><BR>
 
-<pre><b>LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe() instead")
+<pre><b>LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial() instead")
 int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_continue() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider migrating towards LZ4_decompress_safe_continue() instead. "
+               "Note that the contract will change (requires block's compressed size, instead of decompressed size)")
 int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_usingDict() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial_usingDict() instead")
 int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize, const char* dictStart, int dictSize);
 </b><p>  These functions used to be faster than LZ4_decompress_safe(),
   but this is no longer the case. They are now slower.

doc/lz4frame_manual.html

@@ -1,10 +1,10 @@
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
-<title>1.9.4 Manual</title>
+<title>1.10.0 Manual</title>
 </head>
 <body>
-<h1>1.9.4 Manual</h1>
+<h1>1.10.0 Manual</h1>
 <hr>
 <a name="Contents"></a><h2>Contents</h2>
 <ol>
@@ -18,7 +18,10 @@
 <li><a href="#Chapter8">Compression</a></li>
 <li><a href="#Chapter9">Decompression functions</a></li>
 <li><a href="#Chapter10">Streaming decompression functions</a></li>
-<li><a href="#Chapter11">Bulk processing dictionary API</a></li>
+<li><a href="#Chapter11">Dictionary compression API</a></li>
+<li><a href="#Chapter12">Bulk processing dictionary compression</a></li>
+<li><a href="#Chapter13">Advanced compression operations</a></li>
+<li><a href="#Chapter14">Custom memory allocation</a></li>
 </ol>
 <hr>
 <a name="Chapter1"></a><h2>Introduction</h2><pre>
@@ -76,13 +79,13 @@
 } LZ4F_frameType_t;
 </b></pre><BR>
 <pre><b>typedef struct {
-  LZ4F_blockSizeID_t     blockSizeID;         </b>/* max64KB, max256KB, max1MB, max4MB; 0 == default */<b>
-  LZ4F_blockMode_t       blockMode;           </b>/* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default */<b>
-  LZ4F_contentChecksum_t contentChecksumFlag; </b>/* 1: frame terminated with 32-bit checksum of decompressed data; 0: disabled (default) */<b>
+  LZ4F_blockSizeID_t     blockSizeID;         </b>/* max64KB, max256KB, max1MB, max4MB; 0 == default (LZ4F_max64KB) */<b>
+  LZ4F_blockMode_t       blockMode;           </b>/* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default (LZ4F_blockLinked) */<b>
+  LZ4F_contentChecksum_t contentChecksumFlag; </b>/* 1: add a 32-bit checksum of frame's decompressed data; 0 == default (disabled) */<b>
   LZ4F_frameType_t       frameType;           </b>/* read-only field : LZ4F_frame or LZ4F_skippableFrame */<b>
   unsigned long long     contentSize;         </b>/* Size of uncompressed content ; 0 == unknown */<b>
   unsigned               dictID;              </b>/* Dictionary ID, sent by compressor to help decoder select correct dictionary; 0 == no dictID provided */<b>
-  LZ4F_blockChecksum_t   blockChecksumFlag;   </b>/* 1: each block followed by a checksum of block's compressed data; 0: disabled (default) */<b>
+  LZ4F_blockChecksum_t   blockChecksumFlag;   </b>/* 1: each block followed by a checksum of block's compressed data; 0 == default (disabled) */<b>
 } LZ4F_frameInfo_t;
 </b><p>  makes it possible to set or read frame parameters.
   Structure must be first init to 0, using memset() or LZ4F_INIT_FRAMEINFO,
@@ -105,6 +108,27 @@
 
 <a name="Chapter5"></a><h2>Simple compression function</h2><pre></pre>
 
+<pre><b>size_t LZ4F_compressFrame(void* dstBuffer, size_t dstCapacity,
+                                const void* srcBuffer, size_t srcSize,
+                                const LZ4F_preferences_t* preferencesPtr);
+</b><p>  Compress srcBuffer content into an LZ4-compressed frame.
+  It's a one shot operation, all input content is consumed, and all output is generated.
+
+  Note : it's a stateless operation (no LZ4F_cctx state needed).
+  In order to reduce load on the allocator, LZ4F_compressFrame(), by default,
+  uses the stack to allocate space for the compression state and some table.
+  If this usage of the stack is too much for your application,
+  consider compiling `lz4frame.c` with compile-time macro LZ4F_HEAPMODE set to 1 instead.
+  All state allocations will use the Heap.
+  It also means each invocation of LZ4F_compressFrame() will trigger several internal alloc/free invocations.
+
+ @dstCapacity MUST be >= LZ4F_compressFrameBound(srcSize, preferencesPtr).
+ @preferencesPtr is optional : one can provide NULL, in which case all preferences are set to default.
+ @return : number of bytes written into dstBuffer.
+           or an error code if it fails (can be tested using LZ4F_isError())
+ 
+</p></pre><BR>
+
 <pre><b>size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr);
 </b><p>  Returns the maximum possible compressed size with LZ4F_compressFrame() given srcSize and preferences.
  `preferencesPtr` is optional. It can be replaced by NULL, in which case, the function will assume default preferences.
@@ -113,14 +137,8 @@
  
 </p></pre><BR>
 
-<pre><b>size_t LZ4F_compressFrame(void* dstBuffer, size_t dstCapacity,
-                                const void* srcBuffer, size_t srcSize,
-                                const LZ4F_preferences_t* preferencesPtr);
-</b><p>  Compress an entire srcBuffer into a valid LZ4 frame.
-  dstCapacity MUST be >= LZ4F_compressFrameBound(srcSize, preferencesPtr).
-  The LZ4F_preferences_t structure is optional : you can provide NULL as argument. All preferences will be set to default.
- @return : number of bytes written into dstBuffer.
-           or an error code if it fails (can be tested using LZ4F_isError())
+<pre><b>int LZ4F_compressionLevel_max(void);   </b>/* v1.8.0+ */<b>
+</b><p> @return maximum allowed compression level (currently: 12)
  
 </p></pre><BR>
 
@@ -157,7 +175,7 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
                                       const LZ4F_preferences_t* prefsPtr);
 </b><p>  will write the frame header into dstBuffer.
   dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
- `prefsPtr` is optional : you can provide NULL as argument, all preferences will then be set to default.
+ `prefsPtr` is optional : NULL can be provided to set all preferences to default.
  @return : number of bytes written into dstBuffer for the header
            or an error code (which can be tested using LZ4F_isError())
  
@@ -227,8 +245,9 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
 <a name="Chapter9"></a><h2>Decompression functions</h2><pre></pre>
 
 <pre><b>typedef struct {
-  unsigned stableDst;     /* pledges that last 64KB decompressed data will remain available unmodified between invocations.
-                           * This optimization skips storage operations in tmp buffers. */
+  unsigned stableDst;     /* pledges that last 64KB decompressed data is present right before @dstBuffer pointer.
+                           * This optimization skips internal storage operations.
+                           * Once set, this pledge must remain valid up to the end of current frame. */
   unsigned skipChecksums; /* disable checksum calculation and verification, even when one is present in frame, to save CPU time.
                            * Setting this option to 1 once disables all checksums for the rest of the frame. */
   unsigned reserved1;     </b>/* must be set to zero for forward compatibility */<b>
@@ -329,6 +348,11 @@ LZ4F_decompress(LZ4F_dctx* dctx,
  `dstBuffer` can freely change between each consecutive function invocation.
  `dstBuffer` content will be overwritten.
 
+  Note: if `LZ4F_getFrameInfo()` is called before `LZ4F_decompress()`, srcBuffer must be updated to reflect
+  the number of bytes consumed after reading the frame header. Failure to update srcBuffer before calling
+  `LZ4F_decompress()` will cause decompression failure or, even worse, successful but incorrect decompression.
+  See the `LZ4F_getFrameInfo()` docs for details.
+
  @return : an hint of how many `srcSize` bytes LZ4F_decompress() expects for next call.
   Schematically, it's the size of the current (or remaining) compressed block + header of next block.
   Respecting the hint provides some small speed benefit, because it skips intermediate buffers.
@@ -353,74 +377,28 @@ LZ4F_decompress(LZ4F_dctx* dctx,
   and start a new one using same context resources. 
 </p></pre><BR>
 
-<pre><b>typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM)
-              _LZ4F_dummy_error_enum_for_c89_never_used } LZ4F_errorCodes;
-</b></pre><BR>
-<pre><b>LZ4FLIB_STATIC_API size_t LZ4F_getBlockSize(LZ4F_blockSizeID_t blockSizeID);
-</b><p>  Return, in scalar format (size_t),
-  the maximum block size associated with blockSizeID.
-</p></pre><BR>
+<a name="Chapter11"></a><h2>Dictionary compression API</h2><pre></pre>
 
-<pre><b>LZ4FLIB_STATIC_API size_t
-LZ4F_uncompressedUpdate(LZ4F_cctx* cctx,
-                        void* dstBuffer, size_t dstCapacity,
-                  const void* srcBuffer, size_t srcSize,
-                  const LZ4F_compressOptions_t* cOptPtr);
-</b><p>  LZ4F_uncompressedUpdate() can be called repetitively to add as much data uncompressed data as necessary.
-  Important rule: dstCapacity MUST be large enough to store the entire source buffer as
-  no compression is done for this operation
-  If this condition is not respected, LZ4F_uncompressedUpdate() will fail (result is an errorCode).
-  After an error, the state is left in a UB state, and must be re-initialized or freed.
-  If previously a compressed block was written, buffered data is flushed
-  before appending uncompressed data is continued.
-  This is only supported when LZ4F_blockIndependent is used
- `cOptPtr` is optional : NULL can be provided, in which case all options are set to default.
- @return : number of bytes written into `dstBuffer` (it can be zero, meaning input data was just buffered).
-           or an error code if it fails (which can be tested using LZ4F_isError())
+<pre><b>size_t
+LZ4F_compressBegin_usingDict(LZ4F_cctx* cctx,
+                            void* dstBuffer, size_t dstCapacity,
+                      const void* dictBuffer, size_t dictSize,
+                      const LZ4F_preferences_t* prefsPtr);
+</b><p>  Inits dictionary compression streaming, and writes the frame header into dstBuffer.
+ @dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
+ @prefsPtr is optional : one may provide NULL as argument,
+  however, it's the only way to provide dictID in the frame header.
+ @dictBuffer must outlive the compression session.
+ @return : number of bytes written into dstBuffer for the header,
+           or an error code (which can be tested using LZ4F_isError())
+  NOTE: The LZ4Frame spec allows each independent block to be compressed with the dictionary,
+        but this entry supports a more limited scenario, where only the first block uses the dictionary.
+        This is still useful for small data, which only need one block anyway.
+        For larger inputs, one may be more interested in LZ4F_compressFrame_usingCDict() below.
  
 </p></pre><BR>
 
-<a name="Chapter11"></a><h2>Bulk processing dictionary API</h2><pre></pre>
-
-<pre><b>LZ4FLIB_STATIC_API LZ4F_CDict* LZ4F_createCDict(const void* dictBuffer, size_t dictSize);
-LZ4FLIB_STATIC_API void        LZ4F_freeCDict(LZ4F_CDict* CDict);
-</b><p>  When compressing multiple messages / blocks using the same dictionary, it's recommended to load it just once.
-  LZ4_createCDict() will create a digested dictionary, ready to start future compression operations without startup delay.
-  LZ4_CDict can be created once and shared by multiple threads concurrently, since its usage is read-only.
- `dictBuffer` can be released after LZ4_CDict creation, since its content is copied within CDict 
-</p></pre><BR>
-
-<pre><b>LZ4FLIB_STATIC_API size_t
-LZ4F_compressFrame_usingCDict(LZ4F_cctx* cctx,
-                              void* dst, size_t dstCapacity,
-                        const void* src, size_t srcSize,
-                        const LZ4F_CDict* cdict,
-                        const LZ4F_preferences_t* preferencesPtr);
-</b><p>  Compress an entire srcBuffer into a valid LZ4 frame using a digested Dictionary.
-  cctx must point to a context created by LZ4F_createCompressionContext().
-  If cdict==NULL, compress without a dictionary.
-  dstBuffer MUST be >= LZ4F_compressFrameBound(srcSize, preferencesPtr).
-  If this condition is not respected, function will fail (@return an errorCode).
-  The LZ4F_preferences_t structure is optional : you may provide NULL as argument,
-  but it's not recommended, as it's the only way to provide dictID in the frame header.
- @return : number of bytes written into dstBuffer.
-           or an error code if it fails (can be tested using LZ4F_isError()) 
-</p></pre><BR>
-
-<pre><b>LZ4FLIB_STATIC_API size_t
-LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctx,
-                              void* dstBuffer, size_t dstCapacity,
-                        const LZ4F_CDict* cdict,
-                        const LZ4F_preferences_t* prefsPtr);
-</b><p>  Inits streaming dictionary compression, and writes the frame header into dstBuffer.
-  dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
- `prefsPtr` is optional : you may provide NULL as argument,
-  however, it's the only way to provide dictID in the frame header.
- @return : number of bytes written into dstBuffer for the header,
-           or an error code (which can be tested using LZ4F_isError()) 
-</p></pre><BR>
-
-<pre><b>LZ4FLIB_STATIC_API size_t
+<pre><b>size_t
 LZ4F_decompress_usingDict(LZ4F_dctx* dctxPtr,
                           void* dstBuffer, size_t* dstSizePtr,
                     const void* srcBuffer, size_t* srcSizePtr,
@@ -431,6 +409,81 @@ LZ4F_decompress_usingDict(LZ4F_dctx* dctxPtr,
   It must remain accessible throughout the entire frame decoding. 
 </p></pre><BR>
 
+<a name="Chapter12"></a><h2>Bulk processing dictionary compression</h2><pre></pre>
+
+<pre><b>LZ4F_CDict* LZ4F_createCDict(const void* dictBuffer, size_t dictSize);
+void        LZ4F_freeCDict(LZ4F_CDict* CDict);
+</b><p>  When compressing multiple messages / blocks using the same dictionary, it's recommended to initialize it just once.
+  LZ4_createCDict() will create a digested dictionary, ready to start future compression operations without startup delay.
+  LZ4_CDict can be created once and shared by multiple threads concurrently, since its usage is read-only.
+ @dictBuffer can be released after LZ4_CDict creation, since its content is copied within CDict. 
+</p></pre><BR>
+
+<pre><b>size_t
+LZ4F_compressFrame_usingCDict(LZ4F_cctx* cctx,
+                              void* dst, size_t dstCapacity,
+                        const void* src, size_t srcSize,
+                        const LZ4F_CDict* cdict,
+                        const LZ4F_preferences_t* preferencesPtr);
+</b><p>  Compress an entire srcBuffer into a valid LZ4 frame using a digested Dictionary.
+ @cctx must point to a context created by LZ4F_createCompressionContext().
+  If @cdict==NULL, compress without a dictionary.
+ @dstBuffer MUST be >= LZ4F_compressFrameBound(srcSize, preferencesPtr).
+  If this condition is not respected, function will fail (@return an errorCode).
+  The LZ4F_preferences_t structure is optional : one may provide NULL as argument,
+  but it's not recommended, as it's the only way to provide @dictID in the frame header.
+ @return : number of bytes written into dstBuffer.
+           or an error code if it fails (can be tested using LZ4F_isError())
+  Note: for larger inputs generating multiple independent blocks,
+        this entry point uses the dictionary for each block. 
+</p></pre><BR>
+
+<pre><b>size_t
+LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctx,
+                              void* dstBuffer, size_t dstCapacity,
+                        const LZ4F_CDict* cdict,
+                        const LZ4F_preferences_t* prefsPtr);
+</b><p>  Inits streaming dictionary compression, and writes the frame header into dstBuffer.
+ @dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
+ @prefsPtr is optional : one may provide NULL as argument,
+  note however that it's the only way to insert a @dictID in the frame header.
+ @cdict must outlive the compression session.
+ @return : number of bytes written into dstBuffer for the header,
+           or an error code, which can be tested using LZ4F_isError(). 
+</p></pre><BR>
+
+<pre><b>typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM)
+              _LZ4F_dummy_error_enum_for_c89_never_used } LZ4F_errorCodes;
+</b></pre><BR>
+<a name="Chapter13"></a><h2>Advanced compression operations</h2><pre></pre>
+
+<pre><b>LZ4FLIB_STATIC_API size_t LZ4F_getBlockSize(LZ4F_blockSizeID_t blockSizeID);
+</b><p> @return, in scalar format (size_t),
+          the maximum block size associated with @blockSizeID,
+          or an error code (can be tested using LZ4F_isError()) if @blockSizeID is invalid.
+</p></pre><BR>
+
+<pre><b>LZ4FLIB_STATIC_API size_t
+LZ4F_uncompressedUpdate(LZ4F_cctx* cctx,
+                        void* dstBuffer, size_t dstCapacity,
+                  const void* srcBuffer, size_t srcSize,
+                  const LZ4F_compressOptions_t* cOptPtr);
+</b><p>  LZ4F_uncompressedUpdate() can be called repetitively to add data stored as uncompressed blocks.
+  Important rule: dstCapacity MUST be large enough to store the entire source buffer as
+  no compression is done for this operation
+  If this condition is not respected, LZ4F_uncompressedUpdate() will fail (result is an errorCode).
+  After an error, the state is left in a UB state, and must be re-initialized or freed.
+  If previously a compressed block was written, buffered data is flushed first,
+  before appending uncompressed data is continued.
+  This operation is only supported when LZ4F_blockIndependent is used.
+ `cOptPtr` is optional : NULL can be provided, in which case all options are set to default.
+ @return : number of bytes written into `dstBuffer` (it can be zero, meaning input data was just buffered).
+           or an error code if it fails (which can be tested using LZ4F_isError())
+ 
+</p></pre><BR>
+
+<a name="Chapter14"></a><h2>Custom memory allocation</h2><pre></pre>
+
 <pre><b>typedef void* (*LZ4F_AllocFunction) (void* opaqueState, size_t size);
 typedef void* (*LZ4F_CallocFunction) (void* opaqueState, size_t size);
 typedef void  (*LZ4F_FreeFunction) (void* opaqueState, void* address);
@@ -451,5 +504,11 @@ LZ4F_CustomMem const LZ4F_defaultCMem = { NULL, NULL, NULL, NULL };  </b>/**< th
  
 </p></pre><BR>
 
+<pre><b>LZ4FLIB_STATIC_API size_t LZ4F_cctx_size(const LZ4F_cctx* cctx);
+LZ4FLIB_STATIC_API size_t LZ4F_dctx_size(const LZ4F_dctx* dctx);
+</b><p>  These functions return the total memory footprint of the provided context.
+ 
+</p></pre><BR>
+
 </html>
 </body>

examples/.gitignore

@@ -1,11 +1,13 @@
 /Makefile.lz4*
-/printVersion
-/doubleBuffer
-/dictionaryRandomAccess
-/ringBuffer
-/ringBufferHC
-/lineCompress
+/print_version
+/simple_buffer
 /frameCompress
 /fileCompress
-/simpleBuffer
+/blockStreaming_doubleBuffer
+/blockStreaming_ringBuffer
+/streamingHC_ringBuffer
+/blockStreaming_lineByLine
+/dictionaryRandomAccess
+/bench_functions
 /*.exe
+/*.lz4s*

examples/COPYING

@@ -1,339 +1,83 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
+Full name:
+GNU General Public License v2.0 or later
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 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.
+Short identifier:
+GPL-2.0-or-later
 
-                            Preamble
+Text:
+GNU GENERAL PUBLIC LICENSE
+Version 2, June 1991
 
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
-your programs, too.
+Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
 
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
+Preamble
 
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  You must make sure that they, too, receive or can get the
-source code.  And you must show them these terms so they know their
-rights.
+The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too.
 
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
+When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things.
 
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
+To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it.
 
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary.  To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
+For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
 
-  The precise terms and conditions for copying, distribution and
-modification follow.
+We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software.
 
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations.
 
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
+Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all.
 
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
+The precise terms and conditions for copying, distribution and modification follow.
 
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
+0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you".
+Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does.
 
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
+1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program.
+You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee.
 
-    a) You must cause the modified files to carry prominent notices
-    stating that you changed the files and the date of any change.
+2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions:
+a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change.
+b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License.
+c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.)
+These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it.
 
-    b) You must cause any work that you distribute or publish, that in
-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
-    parties under the terms of this License.
+Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program.
 
-    c) If the modified program normally reads commands interactively
-    when run, you must cause it, when started running for such
-    interactive use in the most ordinary way, to print or display an
-    announcement including an appropriate copyright notice and a
-    notice that there is no warranty (or else, saying that you provide
-    a warranty) and that users may redistribute the program under
-    these conditions, and telling the user how to view a copy of this
-    License.  (Exception: if the Program itself is interactive but
-    does not normally print such an announcement, your work based on
-    the Program is not required to print an announcement.)
+In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License.
 
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works.  But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
+3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following:
+a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or,
+b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or,
+c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.)
+The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable.
 
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
+If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code.
 
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
+4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance.
 
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
+5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it.
 
-    a) Accompany it with the complete corresponding machine-readable
-    source code, which must be distributed under the terms of Sections
-    1 and 2 above on a medium customarily used for software interchange; or,
+6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License.
 
-    b) Accompany it with a written offer, valid for at least three
-    years, to give any third party, for a charge no more than your
-    cost of physically performing source distribution, a complete
-    machine-readable copy of the corresponding source code, to be
-    distributed under the terms of Sections 1 and 2 above on a medium
-    customarily used for software interchange; or,
+7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program.
+If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances.
 
-    c) Accompany it with the information you received as to the offer
-    to distribute corresponding source code.  (This alternative is
-    allowed only for noncommercial distribution and only if you
-    received the program in object code or executable form with such
-    an offer, in accord with Subsection b above.)
+It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice.
 
-The source code for a work means the preferred form of the work for
-making modifications to it.  For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to
-control compilation and installation of the executable.  However, as a
-special exception, the source code distributed need not include
-anything that is normally distributed (in either source or binary
-form) with the major components (compiler, kernel, and so on) of the
-operating system on which the executable runs, unless that component
-itself accompanies the executable.
+This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License.
 
-If distribution of executable or object code is made by offering
-access to copy from a designated place, then offering equivalent
-access to copy the source code from the same place counts as
-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
+8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License.
 
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
+9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation.
 
-  5. You are not required to accept this License, since you have not
-signed it.  However, nothing else grants you permission to modify or
-distribute the Program or its derivative works.  These actions are
-prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
+10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally.
+NO WARRANTY
 
-  6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions.  You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
+11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
 
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
-
-  9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
-                            NO WARRANTY
-
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    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 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, 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.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-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 Ty Coon>, 1 April 1989
-  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
-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.
+12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

examples/Makefile

@@ -27,88 +27,78 @@
 # kindly provided by Takayuki Matsuoka
 # ##########################################################################
 
-CPPFLAGS += -I../lib
-CFLAGS   ?= -O3
-CFLAGS   += -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Wstrict-prototypes
-FLAGS    := $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)
+LIBDIR    := ../lib
 
-TESTFILE  = Makefile
-LZ4DIR   := ../lib
-LZ4       = ../programs/lz4
+CPPFLAGS  += -I$(LIBDIR)
+USERCFLAGS:= $(CFLAGS)
+WFLAGS     = -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Wstrict-prototypes -Wc++-compat
+CFLAGS     = $(WFLAGS) -O2 $(USERCFLAGS)
 
-include ../Makefile.inc
+TESTFILE   = Makefile
+TESTFILE_SMALL= .gitignore
+LZ4DIR     = ../programs
+LZ4        = $(LZ4DIR)/lz4
+LIBLZ4DIR  = ../lib
+LIBLZ4SRCS = $(notdir $(wildcard $(LIBLZ4DIR)/*.c))
+LIBLZ4OBJS = $(LIBLZ4SRCS:.c=.o)
+SLIBLZ4   := liblz4.a
 
 default: all
 
-all: printVersion doubleBuffer dictionaryRandomAccess ringBuffer ringBufferHC \
-     lineCompress frameCompress fileCompress simpleBuffer
+C_SRCDIRS = . ../lib
+include ../build/make/multiconf.make
 
-$(LZ4DIR)/liblz4.a: $(LZ4DIR)/lz4.c $(LZ4DIR)/lz4hc.c $(LZ4DIR)/lz4frame.c $(LZ4DIR)/lz4.h $(LZ4DIR)/lz4hc.h $(LZ4DIR)/lz4frame.h $(LZ4DIR)/lz4frame_static.h
-	$(MAKE) -C $(LZ4DIR) liblz4.a
+$(SLIBLZ4):
+$(eval $(call static_library,$(SLIBLZ4), $(LIBLZ4OBJS)))
 
-printVersion: printVersion.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+ALL = print_version \
+	  simple_buffer \
+	  frameCompress \
+	  fileCompress \
+      blockStreaming_doubleBuffer \
+	  blockStreaming_ringBuffer \
+	  streamingHC_ringBuffer \
+      blockStreaming_lineByLine \
+	  dictionaryRandomAccess \
+	  bench_functions
 
-doubleBuffer: blockStreaming_doubleBuffer.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+.PHONY: all
+all: $(ALL)
 
-dictionaryRandomAccess: dictionaryRandomAccess.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-ringBuffer  : blockStreaming_ringBuffer.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-ringBufferHC: HCStreaming_ringBuffer.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-lineCompress: blockStreaming_lineByLine.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-frameCompress: frameCompress.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-fileCompress: fileCompress.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-compressFunctions: compress_functions.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT) -lrt
-
-simpleBuffer: simple_buffer.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+$(ALL): $(SLIBLZ4)
 
+.PHONY:$(LZ4)
+$(LZ4): MAKEFLAGS=
 $(LZ4) :
-	$(MAKE) -C ../programs lz4
+	$(MAKE) -C $(LZ4DIR) lz4
 
+.PHONY: test
 test : all $(LZ4)
 	@echo "\n=== Print Version ==="
-	./printVersion$(EXT)
+	./print_version$(EXT)
 	@echo "\n=== Simple compression example ==="
-	./simpleBuffer$(EXT)
+	./simple_buffer$(EXT)
 	@echo "\n=== Double-buffer ==="
-	./doubleBuffer$(EXT) $(TESTFILE)
+	./blockStreaming_doubleBuffer$(EXT) $(TESTFILE)
 	@echo "\n=== Ring Buffer ==="
-	./ringBuffer$(EXT)   $(TESTFILE)
+	./blockStreaming_ringBuffer$(EXT)   $(TESTFILE)
 	@echo "\n=== Ring Buffer + LZ4 HC ==="
-	./ringBufferHC$(EXT) $(TESTFILE)
+	./streamingHC_ringBuffer$(EXT) $(TESTFILE)
 	@echo "\n=== Compress line by line ==="
-	./lineCompress$(EXT) $(TESTFILE)
+	./blockStreaming_lineByLine$(EXT) $(TESTFILE)
 	@echo "\n=== Dictionary Random Access ==="
 	./dictionaryRandomAccess$(EXT) $(TESTFILE) $(TESTFILE) 1100 1400
+	./dictionaryRandomAccess$(EXT) $(TESTFILE_SMALL) $(TESTFILE_SMALL) 0 32
 	@echo "\n=== Frame compression ==="
 	./frameCompress$(EXT) $(TESTFILE)
 	$(LZ4) -vt $(TESTFILE).lz4
 	@echo "\n=== file compression ==="
 	./fileCompress$(EXT) $(TESTFILE)
 	$(LZ4) -vt $(TESTFILE).lz4
+	@echo "\n=== Q&D benchmark ==="
+	./bench_functions$(EXT) 10000
 
-.PHONY: cxxtest
-cxxtest: CFLAGS := -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
-cxxtest: clean
-	CC=$(CXX) $(MAKE) -C . all CFLAGS="$(CFLAGS)"
-
+.PHONY: clean
 clean:
-	@rm -f core *.o *.dec *-0 *-9 *-8192 *.lz4s *.lz4 \
-	 printVersion$(EXT) doubleBuffer$(EXT) dictionaryRandomAccess$(EXT) \
-	 ringBuffer$(EXT) ringBufferHC$(EXT) lineCompress$(EXT) frameCompress$(EXT) \
-	 fileCompress$(EXT) compressFunctions$(EXT) simpleBuffer$(EXT)
+	@$(RM) core *.o *.dec *-0 *-9 *-8192 *.lz4s *.lz4 $(ALL)
 	@echo Cleaning completed

examples/bench_functions.c

@@ -1,5 +1,5 @@
 /*
- * compress_functions.c
+ * bench_functions.c
  * Copyright  : Kyle Harper
  * License    : Follows same licensing as the lz4.c/lz4.h program at any given time.  Currently, BSD 2.
  * Description: A program to demonstrate the various compression functions involved in when using LZ4_compress_default().  The idea
@@ -67,8 +67,10 @@
 #include <string.h>   /* for atoi() memcmp() */
 #include <stdint.h>   /* for uint_types */
 #include <inttypes.h> /* for PRIu64 */
-#include <time.h>     /* for clock_gettime() */
+#include <time.h>     /* for clock() */
 #include <locale.h>   /* for setlocale() */
+#include <limits.h>   /* for INT_MAX */
+#include <assert.h>
 
 /* We need to know what one billion is for clock timing. */
 #define BILLION 1000000000L
@@ -82,46 +84,45 @@
 #define ID__LZ4_DECOMPRESS_FAST         6
 
 
-
 /*
  * Easy show-error-and-bail function.
  */
 void run_screaming(const char *message, const int code) {
-  printf("%s\n", message);
+  printf("%s \n", message);
   exit(code);
 }
 
-
 /*
  * Centralize the usage function to keep main cleaner.
  */
-void usage(const char *message) {
-  printf("Usage: ./argPerformanceTesting <iterations>\n");
+void usage(const char* exeName, const char* message) {
+  printf("Usage: %s <iterations> \n", exeName);
   run_screaming(message, 1);
   return;
 }
 
+#define CHECK(c) { if (!(c)) { run_screaming(#c, 1); } }
 
 
 /*
- * Runs the benchmark for LZ4_compress_* based on function_id.
+ * Runs the benchmark for LZ4_* function based on function_id.
+ * @return : benchmark duration, in ns
  */
 uint64_t bench(
     const char *known_good_dst,
     const int function_id,
-    const int iterations,
+    int iterations,
     const char *src,
     char *dst,
     const size_t src_size,
     const size_t max_dst_size,
     const size_t comp_size
   ) {
-  uint64_t time_taken = 0;
   int rv = 0;
   const int warm_up = 5000;
-  struct timespec start, end;
   const int acceleration = 1;
   LZ4_stream_t state;
+  clock_t start = clock();
 
   // Select the right function to perform the benchmark on.  We perform 5000 initial loops to warm the cache and ensure that dst
   // remains matching to known_good_dst between successive calls.
@@ -129,40 +130,40 @@ uint64_t bench(
     case ID__LZ4_COMPRESS_DEFAULT:
       printf("Starting benchmark for function: LZ4_compress_default()\n");
       for(int junk=0; junk<warm_up; junk++)
-        rv = LZ4_compress_default(src, dst, src_size, max_dst_size);
+        rv = LZ4_compress_default(src, dst, (int)src_size, (int)max_dst_size);
       if (rv < 1)
         run_screaming("Couldn't run LZ4_compress_default()... error code received is in exit code.", rv);
       if (memcmp(known_good_dst, dst, max_dst_size) != 0)
         run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
-      clock_gettime(CLOCK_MONOTONIC, &start);
+      start = clock();
       for (int i=1; i<=iterations; i++)
-        LZ4_compress_default(src, dst, src_size, max_dst_size);
+        LZ4_compress_default(src, dst, (int)src_size, (int)max_dst_size);
       break;
 
     case ID__LZ4_COMPRESS_FAST:
       printf("Starting benchmark for function: LZ4_compress_fast()\n");
       for(int junk=0; junk<warm_up; junk++)
-        rv = LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration);
+        rv = LZ4_compress_fast(src, dst, (int)src_size, (int)max_dst_size, acceleration);
       if (rv < 1)
         run_screaming("Couldn't run LZ4_compress_fast()... error code received is in exit code.", rv);
       if (memcmp(known_good_dst, dst, max_dst_size) != 0)
         run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
-      clock_gettime(CLOCK_MONOTONIC, &start);
+      start = clock();
       for (int i=1; i<=iterations; i++)
-        LZ4_compress_fast(src, dst, src_size, max_dst_size, acceleration);
+        LZ4_compress_fast(src, dst, (int)src_size, (int)max_dst_size, acceleration);
       break;
 
     case ID__LZ4_COMPRESS_FAST_EXTSTATE:
       printf("Starting benchmark for function: LZ4_compress_fast_extState()\n");
       for(int junk=0; junk<warm_up; junk++)
-        rv = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration);
+        rv = LZ4_compress_fast_extState(&state, src, dst, (int)src_size, (int)max_dst_size, acceleration);
       if (rv < 1)
         run_screaming("Couldn't run LZ4_compress_fast_extState()... error code received is in exit code.", rv);
       if (memcmp(known_good_dst, dst, max_dst_size) != 0)
         run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
-      clock_gettime(CLOCK_MONOTONIC, &start);
+      start = clock();
       for (int i=1; i<=iterations; i++)
-        LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, acceleration);
+        LZ4_compress_fast_extState(&state, src, dst, (int)src_size, (int)max_dst_size, acceleration);
       break;
 
 //    Disabled until LZ4_compress_generic() is exposed in the header.
@@ -188,27 +189,27 @@ uint64_t bench(
     case ID__LZ4_DECOMPRESS_SAFE:
       printf("Starting benchmark for function: LZ4_decompress_safe()\n");
       for(int junk=0; junk<warm_up; junk++)
-        rv = LZ4_decompress_safe(src, dst, comp_size, src_size);
+        rv = LZ4_decompress_safe(src, dst, (int)comp_size, (int)src_size);
       if (rv < 1)
         run_screaming("Couldn't run LZ4_decompress_safe()... error code received is in exit code.", rv);
       if (memcmp(known_good_dst, dst, src_size) != 0)
         run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
-      clock_gettime(CLOCK_MONOTONIC, &start);
+      start = clock();
       for (int i=1; i<=iterations; i++)
-        LZ4_decompress_safe(src, dst, comp_size, src_size);
+        LZ4_decompress_safe(src, dst, (int)comp_size, (int)src_size);
       break;
 
     case ID__LZ4_DECOMPRESS_FAST:
       printf("Starting benchmark for function: LZ4_decompress_fast()\n");
       for(int junk=0; junk<warm_up; junk++)
-        rv = LZ4_decompress_fast(src, dst, src_size);
+        rv = LZ4_decompress_fast(src, dst, (int)src_size);
       if (rv < 1)
         run_screaming("Couldn't run LZ4_decompress_fast()... error code received is in exit code.", rv);
       if (memcmp(known_good_dst, dst, src_size) != 0)
         run_screaming("According to memcmp(), the compressed dst we got doesn't match the known_good_dst... ruh roh.", 1);
-      clock_gettime(CLOCK_MONOTONIC, &start);
+      start = clock();
       for (int i=1; i<=iterations; i++)
-        LZ4_decompress_fast(src, dst, src_size);
+        LZ4_decompress_fast(src, dst, (int)src_size);
       break;
 
     default:
@@ -216,15 +217,21 @@ uint64_t bench(
       break;
   }
 
-  // Stop timer and return time taken.
-  clock_gettime(CLOCK_MONOTONIC, &end);
-  time_taken = BILLION *(end.tv_sec - start.tv_sec) + end.tv_nsec - start.tv_nsec;
+  { clock_t end = clock();
 
-  return time_taken;
+    // Low resolution timer => requires more iterations to measure something
+    if (end == start) {
+      assert(iterations < (INT_MAX / 10));
+      iterations *= 10;
+      printf("not enough iterations => increase nb of iterations to %i \n", iterations);
+      return bench(known_good_dst, function_id, iterations, src, dst, src_size, max_dst_size, comp_size);
+    }
+
+    return (uint64_t)((double)(end - start) / CLOCKS_PER_SEC * BILLION);
+  }
 }
 
 
-
 /*
  * main()
  * We will demonstrate the use of each function for simplicity sake.  Then we will run 2 suites of benchmarking:
@@ -235,32 +242,33 @@ uint64_t bench(
  */
 int main(int argc, char **argv) {
   // Get and verify options.  There's really only 1:  How many iterations to run.
+  const char* exeName = argv[0];
   int iterations = 1000000;
   if (argc > 1)
     iterations = atoi(argv[1]);
   if (iterations < 1)
-    usage("Argument 1 (iterations) must be > 0.");
+    usage(exeName, "Argument 1 (iterations) must be > 0.");
 
   // First we will create 2 sources (char *) of 2000 bytes each.  One normal text, the other highly-compressible text.
-  const char *src    = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed luctus purus et risus vulputate, et mollis orci ullamcorper. Nulla facilisi. Fusce in ligula sed purus varius aliquet interdum vitae justo. Proin quis diam velit. Nulla varius iaculis auctor. Cras volutpat, justo eu dictum pulvinar, elit sem porttitor metus, et imperdiet metus sapien et ante. Nullam nisi nulla, ornare eu tristique eu, dignissim vitae diam. Nulla sagittis porta libero, a accumsan felis sagittis scelerisque.  Integer laoreet eleifend congue. Etiam rhoncus leo vel dolor fermentum, quis luctus nisl iaculis. Praesent a erat sapien. Aliquam semper mi in lorem ultrices ultricies. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In feugiat risus sed enim ultrices, at sodales nulla tristique. Maecenas eget pellentesque justo, sed pellentesque lectus. Fusce sagittis sit amet elit vel varius. Donec sed ligula nec ligula vulputate rutrum sed ut lectus. Etiam congue pharetra leo vitae cursus. Morbi enim ante, porttitor ut varius vel, tincidunt quis justo. Nunc iaculis, risus id ultrices semper, metus est efficitur ligula, vel posuere risus nunc eget purus. Ut lorem turpis, condimentum at sem sed, porta aliquam turpis. In ut sapien a nulla dictum tincidunt quis sit amet lorem. Fusce at est egestas, luctus neque eu, consectetur tortor. Phasellus eleifend ultricies nulla ac lobortis.  Morbi maximus quam cursus vehicula iaculis. Maecenas cursus vel justo ut rutrum. Curabitur magna orci, dignissim eget dapibus vitae, finibus id lacus. Praesent rhoncus mattis augue vitae bibendum. Praesent porta mauris non ultrices fermentum. Quisque vulputate ipsum in sodales pulvinar. Aliquam nec mollis felis. Donec vitae augue pulvinar, congue nisl sed, pretium purus. Fusce lobortis mi ac neque scelerisque semper. Pellentesque vel est vitae magna aliquet aliquet. Nam non dolor. Nulla facilisi. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Morbi ac lacinia felis metus.";
-  const char *hc_src = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+  const char src[]    = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed luctus purus et risus vulputate, et mollis orci ullamcorper. Nulla facilisi. Fusce in ligula sed purus varius aliquet interdum vitae justo. Proin quis diam velit. Nulla varius iaculis auctor. Cras volutpat, justo eu dictum pulvinar, elit sem porttitor metus, et imperdiet metus sapien et ante. Nullam nisi nulla, ornare eu tristique eu, dignissim vitae diam. Nulla sagittis porta libero, a accumsan felis sagittis scelerisque.  Integer laoreet eleifend congue. Etiam rhoncus leo vel dolor fermentum, quis luctus nisl iaculis. Praesent a erat sapien. Aliquam semper mi in lorem ultrices ultricies. Lorem ipsum dolor sit amet, consectetur adipiscing elit. In feugiat risus sed enim ultrices, at sodales nulla tristique. Maecenas eget pellentesque justo, sed pellentesque lectus. Fusce sagittis sit amet elit vel varius. Donec sed ligula nec ligula vulputate rutrum sed ut lectus. Etiam congue pharetra leo vitae cursus. Morbi enim ante, porttitor ut varius vel, tincidunt quis justo. Nunc iaculis, risus id ultrices semper, metus est efficitur ligula, vel posuere risus nunc eget purus. Ut lorem turpis, condimentum at sem sed, porta aliquam turpis. In ut sapien a nulla dictum tincidunt quis sit amet lorem. Fusce at est egestas, luctus neque eu, consectetur tortor. Phasellus eleifend ultricies nulla ac lobortis.  Morbi maximus quam cursus vehicula iaculis. Maecenas cursus vel justo ut rutrum. Curabitur magna orci, dignissim eget dapibus vitae, finibus id lacus. Praesent rhoncus mattis augue vitae bibendum. Praesent porta mauris non ultrices fermentum. Quisque vulputate ipsum in sodales pulvinar. Aliquam nec mollis felis. Donec vitae augue pulvinar, congue nisl sed, pretium purus. Fusce lobortis mi ac neque scelerisque semper. Pellentesque vel est vitae magna aliquet aliquet. Nam non dolor. Nulla facilisi. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Morbi ac lacinia felis metus.";
+  const char hc_src[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
   // Set and derive sizes.  Since we're using strings, use strlen() + 1 for \0.
   const size_t src_size = strlen(src) + 1;
-  const size_t max_dst_size = LZ4_compressBound(src_size);
+  const size_t max_dst_size = (size_t)LZ4_compressBound((int)src_size);
   int bytes_returned = 0;
   // Now build allocations for the data we'll be playing with.
-  char *dst               = calloc(1, max_dst_size);
-  char *known_good_dst    = calloc(1, max_dst_size);
-  char *known_good_hc_dst = calloc(1, max_dst_size);
+  char *dst               = (char*)calloc(1, max_dst_size);
+  char *known_good_dst    = (char*)calloc(1, max_dst_size);
+  char *known_good_hc_dst = (char*)calloc(1, max_dst_size);
   if (dst == NULL || known_good_dst == NULL || known_good_hc_dst == NULL)
     run_screaming("Couldn't allocate memory for the destination buffers.  Sad :(", 1);
 
   // Create known-good buffers to verify our tests with other functions will produce the same results.
-  bytes_returned = LZ4_compress_default(src, known_good_dst, src_size, max_dst_size);
+  bytes_returned = LZ4_compress_default(src, known_good_dst, (int)src_size, (int)max_dst_size);
   if (bytes_returned < 1)
     run_screaming("Couldn't create a known-good destination buffer for comparison... this is bad.", 1);
   const size_t src_comp_size = bytes_returned;
-  bytes_returned = LZ4_compress_default(hc_src, known_good_hc_dst, src_size, max_dst_size);
+  bytes_returned = LZ4_compress_default(hc_src, known_good_hc_dst, (int)src_size, (int)max_dst_size);
   if (bytes_returned < 1)
     run_screaming("Couldn't create a known-good (highly compressible) destination buffer for comparison... this is bad.", 1);
   const size_t hc_src_comp_size = bytes_returned;
@@ -272,7 +280,7 @@ int main(int argc, char **argv) {
   /* LZ4_compress_fast() */
   // Using this function is identical to LZ4_compress_default except we need to specify an "acceleration" value.  Defaults to 1.
   memset(dst, 0, max_dst_size);
-  bytes_returned = LZ4_compress_fast(src, dst, src_size, max_dst_size, 1);
+  bytes_returned = LZ4_compress_fast(src, dst, (int)src_size, (int)max_dst_size, 1);
   if (bytes_returned < 1)
     run_screaming("Failed to compress src using LZ4_compress_fast.  echo $? for return code.", bytes_returned);
   if (memcmp(dst, known_good_dst, bytes_returned) != 0)
@@ -282,7 +290,7 @@ int main(int argc, char **argv) {
   // Using this function directly requires that we build an LZ4_stream_t struct ourselves.  We do NOT have to reset it ourselves.
   memset(dst, 0, max_dst_size);
   LZ4_stream_t state;
-  bytes_returned = LZ4_compress_fast_extState(&state, src, dst, src_size, max_dst_size, 1);
+  bytes_returned = LZ4_compress_fast_extState(&state, src, dst, (int)src_size, (int)max_dst_size, 1);
   if (bytes_returned < 1)
     run_screaming("Failed to compress src using LZ4_compress_fast_extState.  echo $? for return code.", bytes_returned);
   if (memcmp(dst, known_good_dst, bytes_returned) != 0)
@@ -315,7 +323,8 @@ int main(int argc, char **argv) {
    * Remember, we cannot call LZ4_compress_generic() directly (yet) so it's disabled.
    */
   // Suite A - Normal Compressibility
-  char *dst_d = calloc(1, src_size);
+  char *dst_d = (char*)calloc(1, src_size);
+  CHECK(dst_d!=NULL);
   memset(dst, 0, max_dst_size);
   printf("\nStarting suite A:  Normal compressible text.\n");
   uint64_t time_taken__default       = bench(known_good_dst, ID__LZ4_COMPRESS_DEFAULT,       iterations, src,            dst,   src_size, max_dst_size, src_comp_size);
@@ -336,26 +345,27 @@ int main(int argc, char **argv) {
 
   // Report and leave.
   setlocale(LC_ALL, "");
-  const char *format        = "|%-14s|%-30s|%'14.9f|%'16d|%'14d|%'13.2f%%|\n";
+  const char *format        = "|%-14s|%-30s|%'14.9f|%'16d|%'14llu|%'13.2f%%|\n";
   const char *header_format = "|%-14s|%-30s|%14s|%16s|%14s|%14s|\n";
   const char *separator     = "+--------------+------------------------------+--------------+----------------+--------------+--------------+\n";
+  uint64_t iterllu = (uint64_t)iterations;
   printf("\n");
   printf("%s", separator);
   printf(header_format, "Source", "Function Benchmarked", "Total Seconds", "Iterations/sec", "ns/Iteration", "% of default");
   printf("%s", separator);
-  printf(format, "Normal Text", "LZ4_compress_default()",       (double)time_taken__default       / BILLION, (int)(iterations / ((double)time_taken__default       /BILLION)), (int)time_taken__default       / iterations, (double)time_taken__default       * 100 / time_taken__default);
-  printf(format, "Normal Text", "LZ4_compress_fast()",          (double)time_taken__fast          / BILLION, (int)(iterations / ((double)time_taken__fast          /BILLION)), (int)time_taken__fast          / iterations, (double)time_taken__fast          * 100 / time_taken__default);
-  printf(format, "Normal Text", "LZ4_compress_fast_extState()", (double)time_taken__fast_extstate / BILLION, (int)(iterations / ((double)time_taken__fast_extstate /BILLION)), (int)time_taken__fast_extstate / iterations, (double)time_taken__fast_extstate * 100 / time_taken__default);
+  printf(format, "Normal Text", "LZ4_compress_default()",       (double)time_taken__default       / BILLION, (int)(iterations / ((double)time_taken__default       /BILLION)), time_taken__default       / iterllu, (double)time_taken__default       * 100 / time_taken__default);
+  printf(format, "Normal Text", "LZ4_compress_fast()",          (double)time_taken__fast          / BILLION, (int)(iterations / ((double)time_taken__fast          /BILLION)), time_taken__fast          / iterllu, (double)time_taken__fast          * 100 / time_taken__default);
+  printf(format, "Normal Text", "LZ4_compress_fast_extState()", (double)time_taken__fast_extstate / BILLION, (int)(iterations / ((double)time_taken__fast_extstate /BILLION)), time_taken__fast_extstate / iterllu, (double)time_taken__fast_extstate * 100 / time_taken__default);
   //printf(format, "Normal Text", "LZ4_compress_generic()",       (double)time_taken__generic       / BILLION, (int)(iterations / ((double)time_taken__generic       /BILLION)), (int)time_taken__generic       / iterations, (double)time_taken__generic       * 100 / time_taken__default);
-  printf(format, "Normal Text", "LZ4_decompress_safe()",        (double)time_taken__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken__decomp_safe   /BILLION)), (int)time_taken__decomp_safe   / iterations, (double)time_taken__decomp_safe   * 100 / time_taken__default);
-  printf(format, "Normal Text", "LZ4_decompress_fast()",        (double)time_taken__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken__decomp_fast   /BILLION)), (int)time_taken__decomp_fast   / iterations, (double)time_taken__decomp_fast   * 100 / time_taken__default);
+  printf(format, "Normal Text", "LZ4_decompress_safe()",        (double)time_taken__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken__decomp_safe   /BILLION)), time_taken__decomp_safe   / iterllu, (double)time_taken__decomp_safe   * 100 / time_taken__default);
+  printf(format, "Normal Text", "LZ4_decompress_fast()",        (double)time_taken__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken__decomp_fast   /BILLION)), time_taken__decomp_fast   / iterllu, (double)time_taken__decomp_fast   * 100 / time_taken__default);
   printf(header_format, "", "", "", "", "", "");
-  printf(format, "Compressible", "LZ4_compress_default()",       (double)time_taken_hc__default       / BILLION, (int)(iterations / ((double)time_taken_hc__default       /BILLION)), (int)time_taken_hc__default       / iterations, (double)time_taken_hc__default       * 100 / time_taken_hc__default);
-  printf(format, "Compressible", "LZ4_compress_fast()",          (double)time_taken_hc__fast          / BILLION, (int)(iterations / ((double)time_taken_hc__fast          /BILLION)), (int)time_taken_hc__fast          / iterations, (double)time_taken_hc__fast          * 100 / time_taken_hc__default);
-  printf(format, "Compressible", "LZ4_compress_fast_extState()", (double)time_taken_hc__fast_extstate / BILLION, (int)(iterations / ((double)time_taken_hc__fast_extstate /BILLION)), (int)time_taken_hc__fast_extstate / iterations, (double)time_taken_hc__fast_extstate * 100 / time_taken_hc__default);
+  printf(format, "Compressible", "LZ4_compress_default()",       (double)time_taken_hc__default       / BILLION, (int)(iterations / ((double)time_taken_hc__default       /BILLION)), time_taken_hc__default       / iterllu, (double)time_taken_hc__default       * 100 / time_taken_hc__default);
+  printf(format, "Compressible", "LZ4_compress_fast()",          (double)time_taken_hc__fast          / BILLION, (int)(iterations / ((double)time_taken_hc__fast          /BILLION)), time_taken_hc__fast          / iterllu, (double)time_taken_hc__fast          * 100 / time_taken_hc__default);
+  printf(format, "Compressible", "LZ4_compress_fast_extState()", (double)time_taken_hc__fast_extstate / BILLION, (int)(iterations / ((double)time_taken_hc__fast_extstate /BILLION)), time_taken_hc__fast_extstate / iterllu, (double)time_taken_hc__fast_extstate * 100 / time_taken_hc__default);
   //printf(format, "Compressible", "LZ4_compress_generic()",       (double)time_taken_hc__generic       / BILLION, (int)(iterations / ((double)time_taken_hc__generic       /BILLION)), (int)time_taken_hc__generic       / iterations, (double)time_taken_hc__generic       * 100 / time_taken_hc__default);
-  printf(format, "Compressible", "LZ4_decompress_safe()",        (double)time_taken_hc__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_safe   /BILLION)), (int)time_taken_hc__decomp_safe   / iterations, (double)time_taken_hc__decomp_safe   * 100 / time_taken_hc__default);
-  printf(format, "Compressible", "LZ4_decompress_fast()",        (double)time_taken_hc__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_fast   /BILLION)), (int)time_taken_hc__decomp_fast   / iterations, (double)time_taken_hc__decomp_fast   * 100 / time_taken_hc__default);
+  printf(format, "Compressible", "LZ4_decompress_safe()",        (double)time_taken_hc__decomp_safe   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_safe   /BILLION)), time_taken_hc__decomp_safe   / iterllu, (double)time_taken_hc__decomp_safe   * 100 / time_taken_hc__default);
+  printf(format, "Compressible", "LZ4_decompress_fast()",        (double)time_taken_hc__decomp_fast   / BILLION, (int)(iterations / ((double)time_taken_hc__decomp_fast   /BILLION)), time_taken_hc__decomp_fast   / iterllu, (double)time_taken_hc__decomp_fast   * 100 / time_taken_hc__default);
   printf("%s", separator);
   printf("\n");
   printf("All done, ran %d iterations per test.\n", iterations);

examples/blockStreaming_doubleBuffer.c

@@ -12,6 +12,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
 
 enum {
     BLOCK_BYTES = 1024 * 8,
@@ -38,6 +39,8 @@ size_t read_bin(FILE* fp, void* array, size_t arrayBytes) {
 
 void test_compress(FILE* outFp, FILE* inpFp)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_stream_t lz4Stream_body;
     LZ4_stream_t* lz4Stream = &lz4Stream_body;
 
@@ -73,6 +76,8 @@ void test_compress(FILE* outFp, FILE* inpFp)
 
 void test_decompress(FILE* outFp, FILE* inpFp)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_streamDecode_t lz4StreamDecode_body;
     LZ4_streamDecode_t* lz4StreamDecode = &lz4StreamDecode_body;
 
@@ -116,6 +121,8 @@ int compare(FILE* fp0, FILE* fp1)
 {
     int result = 0;
 
+    assert(fp0 != NULL); assert(fp1 != NULL);
+
     while(0 == result) {
         char b0[65536];
         char b1[65536];

examples/blockStreaming_doubleBuffer.md

@@ -1,26 +1,31 @@
-# LZ4 Streaming API Example : Double Buffer
+# LZ4 Streaming API Example: Double Buffer
 by *Takayuki Matsuoka*
 
-`blockStreaming_doubleBuffer.c` is LZ4 Streaming API example which implements double buffer (de)compression.
+[`blockStreaming_doubleBuffer.c`](blockStreaming_doubleBuffer.c) is an example
+of the LZ4 Streaming API where we implement double buffer (de)compression.
 
-Please note :
+Please note:
 
- - Firstly, read "LZ4 Streaming API Basics".
- - This is relatively advanced application example.
- - Output file is not compatible with lz4frame and platform dependent.
+- Firstly, read ["LZ4 Streaming API Basics"](streaming_api_basics.md).
+- This is a relatively advanced application example.
+- The output file is not compatible with lz4frame and is platform dependent.
 
 
-## What's the point of this example ?
+## What's the point of this example?
 
- - Handle huge file in small amount of memory
- - Always better compression ratio than Block API
- - Uniform block size
+The LZ4 Streaming API can be used to handle compressing a huge file in a small
+amount of memory. This example shows how to use a "Double Buffer" to compress
+blocks (i.e. chunks) of a uniform size in a stream. The Streaming API used in
+this way *always* yields a better compression ratio than the regular Block API.
 
+For an example with non-uniform blocks, see ["LZ4 Streaming API Example: Line by
+Line Text Compression"](blockStreaming_lineByLine.md).
 
-## How the compression works
+## How compression works
 
-First of all, allocate "Double Buffer" for input and LZ4 compressed data buffer for output.
-Double buffer has two pages, "first" page (Page#1) and "second" page (Page#2).
+Firstly, allocate "Double Buffer" for input and "compressed data buffer" for
+output. Double buffer has two pages, the "first" page (`Page#1`) and the "second"
+page (`Page#2`).
 
 ```
         Double Buffer
@@ -32,10 +37,17 @@ Double buffer has two pages, "first" page (Page#1) and "second" page (Page#2).
          |
          v
       {Out#1}
+```
 
+Next, read the first block to the double buffer's first page. Compress it with
+`LZ4_compress_continue()`. On the first compression, LZ4 doesn't have any
+previous dependencies, so it just compresses the block without dependencies and
+writes the compressed block `{Out#1}` to the compressed data buffer. After that,
+write `{Out#1}` to the file.
 
+```
       Prefix Dependency
-         +---------+
+
          |         |
          v         |
     +---------+----+----+
@@ -44,8 +56,13 @@ Double buffer has two pages, "first" page (Page#1) and "second" page (Page#2).
                    |
                    v
                 {Out#2}
+```
 
+Next, read the second block to the double buffer's second page and compress it.
+This time, LZ4 can use the dependency on `Block#1` to improve the compression
+ratio. This dependency is called "Prefix mode".
 
+```
    External Dictionary Mode
          +---------+
          |         |
@@ -56,8 +73,13 @@ Double buffer has two pages, "first" page (Page#1) and "second" page (Page#2).
          |
          v
       {Out#3}
+```
 
+Next, read the third block to the double buffer's *first* page and compress it.
+This time LZ4 can use dependency on Block#2. This dependency is called "External
+Dictionary mode".
 
+```
       Prefix Dependency
          +---------+
          |         |
@@ -70,31 +92,18 @@ Double buffer has two pages, "first" page (Page#1) and "second" page (Page#2).
                 {Out#4}
 ```
 
-Next, read first block to double buffer's first page. And compress it by `LZ4_compress_continue()`.
-For the first time, LZ4 doesn't know any previous dependencies,
-so it just compress the line without dependencies and generates compressed block {Out#1} to LZ4 compressed data buffer.
-After that, write {Out#1} to the file.
-
-Next, read second block to double buffer's second page. And compress it.
-This time, LZ4 can use dependency to Block#1 to improve compression ratio.
-This dependency is called "Prefix mode".
-
-Next, read third block to double buffer's *first* page, and compress it.
-Also this time, LZ4 can use dependency to Block#2.
-This dependency is called "External Dictonaly mode".
-
-Continue these procedure to the end of the file.
+Continue this procedure till the end of the file.
 
 
-## How the decompression works
+## How decompression works
 
-Decompression will do reverse order.
+Decompression follows the reverse order:
 
- - Read first compressed block.
- - Decompress it to the first page and write that page to the file.
- - Read second compressed block.
- - Decompress it to the second page and write that page to the file.
- - Read third compressed block.
- - Decompress it to the *first* page and write that page to the file.
+- Read the first compressed block.
+- Decompress it to the first page and write that page to the file.
+- Read the second compressed block.
+- Decompress it to the second page and write that page to the file.
+- Read the third compressed block.
+- Decompress it to the *first* page and write that page to the file.
 
-Continue these procedure to the end of the compressed file.
+Continue this procedure till the end of the compressed file.

examples/blockStreaming_lineByLine.c

@@ -12,6 +12,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
 
 static size_t write_uint16(FILE* fp, uint16_t i)
 {
@@ -40,6 +41,8 @@ static void test_compress(
     size_t messageMaxBytes,
     size_t ringBufferBytes)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_stream_t* const lz4Stream = LZ4_createStream();
     const size_t cmpBufBytes = LZ4_COMPRESSBOUND(messageMaxBytes);
     char* const cmpBuf = (char*) malloc(cmpBufBytes);
@@ -89,6 +92,8 @@ static void test_decompress(
     size_t messageMaxBytes,
     size_t ringBufferBytes)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_streamDecode_t* const lz4StreamDecode = LZ4_createStreamDecode();
     char* const cmpBuf = (char*) malloc(LZ4_COMPRESSBOUND(messageMaxBytes));
     char* const decBuf = (char*) malloc(ringBufferBytes);
@@ -123,6 +128,8 @@ static void test_decompress(
 
 static int compare(FILE* f0, FILE* f1)
 {
+    assert(f0 != NULL); assert(f1 != NULL);
+
     int result = 0;
     const size_t tempBufferBytes = 65536;
     char* const b0 = (char*) malloc(tempBufferBytes);

examples/dictionaryRandomAccess.c

@@ -10,6 +10,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
 
 #define MIN(x, y)  ((x) < (y) ? (x) : (y))
 
@@ -55,6 +56,8 @@ void seek_bin(FILE* fp, long offset, int origin) {
 
 void test_compress(FILE* outFp, FILE* inpFp, void *dict, int dictSize)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_stream_t lz4Stream_body;
     LZ4_stream_t* lz4Stream = &lz4Stream_body;
 
@@ -104,6 +107,8 @@ void test_compress(FILE* outFp, FILE* inpFp, void *dict, int dictSize)
 
 void test_decompress(FILE* outFp, FILE* inpFp, void *dict, int dictSize, int offset, int length)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_streamDecode_t lz4StreamDecode_body;
     LZ4_streamDecode_t* lz4StreamDecode = &lz4StreamDecode_body;
 
@@ -174,6 +179,8 @@ int compare(FILE* fp0, FILE* fp1, int length)
 {
     int result = 0;
 
+    assert(fp0 != NULL); assert(fp1 != NULL);
+
     while(0 == result) {
         char b0[4096];
         char b1[4096];
@@ -225,9 +232,13 @@ int main(int argc, char* argv[])
     printf("offset = [%d]\n", offset);
     printf("length = [%d]\n", length);
 
+    assert(offset < INT32_MAX); assert(length < INT32_MAX);
+
     /* Load dictionary */
     {
         FILE* dictFp = fopen(dictFilename, "rb");
+
+        assert(dictFp != NULL);
         dictSize = (int)read_bin(dictFp, dict, DICTIONARY_BYTES);
         fclose(dictFp);
     }
@@ -251,7 +262,7 @@ int main(int argc, char* argv[])
         FILE* outFp = fopen(decFilename, "wb");
 
         printf("decompress : %s -> %s\n", lz4Filename, decFilename);
-        test_decompress(outFp, inpFp, dict, DICTIONARY_BYTES, offset, length);
+        test_decompress(outFp, inpFp, dict, dictSize, offset, length);
         printf("decompress : done\n");
 
         fclose(outFp);
@@ -262,6 +273,8 @@ int main(int argc, char* argv[])
     {
         FILE* inpFp = fopen(inpFilename, "rb");
         FILE* decFp = fopen(decFilename, "rb");
+
+        assert(inpFp != NULL);assert(decFp != NULL);
         seek_bin(inpFp, offset, SEEK_SET);
 
         printf("verify : %s <-> %s\n", inpFilename, decFilename);

examples/fileCompress.c

@@ -28,7 +28,7 @@ static size_t get_file_size(char *filename)
         return 0;
     }
 
-    return statbuf.st_size;
+    return (size_t)statbuf.st_size;
 }
 
 static int compress_file(FILE* f_in, FILE* f_out)
@@ -36,7 +36,6 @@ static int compress_file(FILE* f_in, FILE* f_out)
     assert(f_in != NULL); assert(f_out != NULL);
 
     LZ4F_errorCode_t ret = LZ4F_OK_NoError;
-    size_t len;
     LZ4_writeFile_t* lz4fWrite;
     void* const buf = malloc(CHUNK_SIZE);
     if (!buf) {
@@ -56,7 +55,7 @@ static int compress_file(FILE* f_in, FILE* f_out)
     }
 
     while (1) {
-        len = fread(buf, 1, CHUNK_SIZE, f_in);
+        size_t len = fread(buf, 1, CHUNK_SIZE, f_in);
 
         if (ferror(f_in)) {
             printf("fread error\n");
@@ -94,6 +93,7 @@ static int decompress_file(FILE* f_in, FILE* f_out)
     void* const buf= malloc(CHUNK_SIZE);
     if (!buf) {
         printf("error: memory allocation failed \n");
+        return 1;
     }
 
     ret = LZ4F_readOpen(&lz4fRead, f_in);
@@ -135,9 +135,11 @@ out:
     return 0;
 }
 
+/* @return 0 if both FILE* have identical content */
 int compareFiles(FILE* fp0, FILE* fp1)
 {
     int result = 0;
+    assert(fp0 != NULL); assert(fp1 != NULL);
 
     while (result==0) {
         char b0[1024];
@@ -147,7 +149,7 @@ int compareFiles(FILE* fp0, FILE* fp1)
 
         result = (r0 != r1);
         if (!r0 || !r1) break;
-        if (!result) result = memcmp(b0, b1, r0);
+        if (r0 == r1) result = memcmp(b0, b1, r0);
     }
 
     return result;
@@ -175,7 +177,7 @@ int main(int argc, const char **argv) {
     {   FILE* const inpFp = fopen(inpFilename, "rb");
         FILE* const outFp = fopen(lz4Filename, "wb");
         printf("compress : %s -> %s\n", inpFilename, lz4Filename);
-        LZ4F_errorCode_t ret = compress_file(inpFp, outFp);
+        int ret = compress_file(inpFp, outFp);
         fclose(inpFp);
         fclose(outFp);
 
@@ -188,7 +190,7 @@ int main(int argc, const char **argv) {
             inpFilename,
             get_file_size(inpFilename),
             get_file_size(lz4Filename), /* might overflow is size_t is 32 bits and size_{in,out} > 4 GB */
-            (double)get_file_size(lz4Filename) / get_file_size(inpFilename) * 100);
+            (double)get_file_size(lz4Filename) / (double)get_file_size(inpFilename) * 100);
 
         printf("compress : done\n");
     }
@@ -198,8 +200,11 @@ int main(int argc, const char **argv) {
         FILE* const inpFp = fopen(lz4Filename, "rb");
         FILE* const outFp = fopen(decFilename, "wb");
 
+        if (inpFp == NULL) exit(1);
+        if (outFp == NULL) exit(1);
+
         printf("decompress : %s -> %s\n", lz4Filename, decFilename);
-        LZ4F_errorCode_t ret = decompress_file(inpFp, outFp);
+        int ret = decompress_file(inpFp, outFp);
 
         fclose(outFp);
         fclose(inpFp);
@@ -216,6 +221,9 @@ int main(int argc, const char **argv) {
     {   FILE* const inpFp = fopen(inpFilename, "rb");
         FILE* const decFp = fopen(decFilename, "rb");
 
+        if (inpFp == NULL) exit(1);
+        if (decFp == NULL) exit(1);
+
         printf("verify : %s <-> %s\n", inpFilename, decFilename);
         int const cmp = compareFiles(inpFp, decFp);
 

examples/streamingHC_ringBuffer.c

@@ -56,6 +56,8 @@ size_t read_bin(FILE* fp, void* array, int arrayBytes) {
 
 void test_compress(FILE* outFp, FILE* inpFp)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     LZ4_streamHC_t lz4Stream_body = { 0 };
     LZ4_streamHC_t* lz4Stream = &lz4Stream_body;
 
@@ -91,6 +93,8 @@ void test_compress(FILE* outFp, FILE* inpFp)
 
 void test_decompress(FILE* outFp, FILE* inpFp)
 {
+    assert(outFp != NULL); assert(inpFp != NULL);
+
     static char decBuf[DEC_BUFFER_BYTES];
     int decOffset = 0;
     LZ4_streamDecode_t lz4StreamDecode_body = { 0 };
@@ -132,6 +136,8 @@ void test_decompress(FILE* outFp, FILE* inpFp)
 // return ByteNb>0 if different
 size_t compare(FILE* f0, FILE* f1)
 {
+    assert(f0 != NULL); assert(f1 != NULL);
+
     size_t result = 1;
 
     for (;;) {

lib/Makefile

@@ -1,6 +1,6 @@
 # ################################################################
 # LZ4 library - Makefile
-# Copyright (C) Yann Collet 2011-2020
+# Copyright (C) Yann Collet 2011-2023
 # All rights reserved.
 #
 # This Makefile is validated for Linux, macOS, *BSD, Hurd, Solaris, MSYS2 targets
@@ -31,12 +31,12 @@
 #  - LZ4 source repository : https://github.com/lz4/lz4
 #  - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
 # ################################################################
-SED = sed
+SED ?= sed
 
 # Version numbers
-LIBVER_MAJOR_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
-LIBVER_MINOR_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
-LIBVER_PATCH_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
+LIBVER_MAJOR_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
+LIBVER_MINOR_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
+LIBVER_PATCH_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ./lz4.h`
 LIBVER_SCRIPT:= $(LIBVER_MAJOR_SCRIPT).$(LIBVER_MINOR_SCRIPT).$(LIBVER_PATCH_SCRIPT)
 LIBVER_MAJOR := $(shell echo $(LIBVER_MAJOR_SCRIPT))
 LIBVER_MINOR := $(shell echo $(LIBVER_MINOR_SCRIPT))
@@ -47,17 +47,24 @@ BUILD_SHARED:=yes
 BUILD_STATIC:=yes
 
 CPPFLAGS+= -DXXH_NAMESPACE=LZ4_
-CPPFLAGS+= $(MOREFLAGS)
-CFLAGS  ?= -O3
+USERCFLAGS:= -O3 $(CFLAGS)
 DEBUGFLAGS:= -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow \
-             -Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes \
+             -Wswitch-enum -Wdeclaration-after-statement \
+             -Wstrict-prototypes -Wmissing-prototypes \
              -Wundef -Wpointer-arith -Wstrict-aliasing=1
-CFLAGS  += $(DEBUGFLAGS)
-FLAGS    = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
+CFLAGS   = $(DEBUGFLAGS) $(USERCFLAGS)
+ALLFLAGS = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 
 SRCFILES := $(sort $(wildcard *.c))
+OBJFILES = $(SRCFILES:.c=.o)
 
-include ../Makefile.inc
+include ../build/make/lz4defs.make
+
+# default is defined as the first target in Makefile, hence before multiconf.make
+.PHONY: default
+default: lib-release
+
+include ../build/make/multiconf.make
 
 # OS X linker doesn't support -soname, and use different extension
 # see : https://developer.apple.com/library/mac/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryDesignGuidelines.html
@@ -70,41 +77,43 @@ else
 	ifeq ($(WINBASED),yes)
 		SHARED_EXT = dll
 		SHARED_EXT_VER = $(SHARED_EXT)
-	else
+	else  # posix non-mac
 		SONAME_FLAGS = -Wl,-soname=liblz4.$(SHARED_EXT).$(LIBVER_MAJOR)
 		SHARED_EXT = so
 		SHARED_EXT_MAJOR = $(SHARED_EXT).$(LIBVER_MAJOR)
 		SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
 	endif
+# AIX linker doesn't support -soname, hence assigning nil string
+ifeq ($(TARGET_OS), AIX)
+	SONAME_FLAGS =
+endif
 endif
-
-.PHONY: default
-default: lib-release
 
 # silent mode by default; verbose can be triggered by V=1 or VERBOSE=1
 $(V)$(VERBOSE).SILENT:
 
+.PHONY:lib-release
 lib-release: DEBUGFLAGS :=
-lib-release: lib
+lib-release: lib liblz4.pc
 
 .PHONY: lib
 lib: liblz4.a liblz4
 
 .PHONY: all
-all: lib
+all: lib liblz4.pc
 
 .PHONY: all32
 all32: CFLAGS+=-m32
 all32: all
 
-liblz4.a: $(SRCFILES)
-ifeq ($(BUILD_STATIC),yes)  # can be disabled on command line
-	@echo compiling static library
-	$(COMPILE.c) $^
-	$(AR) rcs $@ *.o
+liblz4.a:
+ifeq ($(BUILD_STATIC),yes)
+$(eval $(call static_library,liblz4.a,$(OBJFILES)))
 endif
 
 ifeq ($(WINBASED),yes)
+
+CLEAN += $(liblz4-dll.rc)
 liblz4-dll.rc: liblz4-dll.rc.in
 	@echo creating library resource
 	$(SED) -e 's|@LIBLZ4@|$(LIBLZ4_NAME)|' \
@@ -116,35 +125,58 @@ liblz4-dll.rc: liblz4-dll.rc.in
 liblz4-dll.o: liblz4-dll.rc
 	$(WINDRES) -i liblz4-dll.rc -o liblz4-dll.o
 
+CLEAN += $(LIBLZ4) $(LIBLZ4_EXP)
 $(LIBLZ4): $(SRCFILES) liblz4-dll.o
-ifeq ($(BUILD_SHARED),yes)
+  ifeq ($(BUILD_SHARED),yes)
 	@echo compiling dynamic library $(LIBVER)
-	$(CC) $(FLAGS) -DLZ4_DLL_EXPORT=1 -shared $^ -o $@ -Wl,--out-implib,$(LIBLZ4_EXP)
-endif
+	$(CC) $(ALLFLAGS) -DLZ4_DLL_EXPORT=1 -shared $^ $(LDLIBS) -o $@ -Wl,--out-implib,$(LIBLZ4_EXP)
+  endif
 
 else   # not windows
 
-$(LIBLZ4): $(SRCFILES)
+$(LIBLZ4): LDFLAGS += -fvisibility=hidden $(SONAME_FLAGS)
 ifeq ($(BUILD_SHARED),yes)
-	@echo compiling dynamic library $(LIBVER)
-	$(CC) $(FLAGS) -shared $^ -fPIC -fvisibility=hidden $(SONAME_FLAGS) -o $@
-	@echo creating versioned links
-	$(LN_SF) $@ liblz4.$(SHARED_EXT_MAJOR)
-	$(LN_SF) $@ liblz4.$(SHARED_EXT)
+$(eval $(call c_dynamic_library,$(LIBLZ4),$(OBJFILES),,echo "$(LIBLZ4) created"))
 endif
 
 endif
 
+# Create symlinks for shared library versions (not needed on Windows)
+ifneq ($(WINBASED),yes)
+
+liblz4.$(SHARED_EXT_MAJOR): $(LIBLZ4)
+	$(LN_SF) $< $@
+
+liblz4.$(SHARED_EXT): liblz4.$(SHARED_EXT_MAJOR)
+	$(LN_SF) $< $@
+
+.PHONY: liblz4
+liblz4: $(LIBLZ4) liblz4.$(SHARED_EXT_MAJOR) liblz4.$(SHARED_EXT)
+
+else
+
+# On Windows, LIBLZ4 is the final DLL target (no symlinks needed)
 .PHONY: liblz4
 liblz4: $(LIBLZ4)
 
+endif
+
+CLEAN += liblz4.pc
+liblz4.pc: liblz4.pc.in Makefile
+	@echo creating pkgconfig
+	$(SED) -e 's|@PREFIX@|$(prefix)|' \
+           -e 's|@LIBDIR@|$(libdir)|' \
+           -e 's|@INCLUDEDIR@|$(includedir)|' \
+           -e 's|@VERSION@|$(LIBVER)|' \
+           -e 's|=${prefix}/|=$${prefix}/|' \
+           $< >$@
+
 .PHONY: clean
 clean:
-ifeq ($(WINBASED),yes)
 	$(RM) *.rc
-endif
-	$(RM) core *.o liblz4.pc $(LIBLZ4) $(LIBLZ4_EXP)
-	$(RM) *.a *.$(SHARED_EXT) *.$(SHARED_EXT_MAJOR) *.$(SHARED_EXT_VER)
+	$(RM) $(CLEAN) core *.o *.a
+	$(RM) *.$(SHARED_EXT) *.$(SHARED_EXT_MAJOR) *.$(SHARED_EXT_VER)
+	$(RM) -r tmp*
 	@echo Cleaning library completed
 
 #-----------------------------------------------------------------------------
@@ -178,17 +210,9 @@ PKGCONFIGDIR ?= $(libdir)/pkgconfig
   endif
 pkgconfigdir ?= $(PKGCONFIGDIR)
 
-liblz4.pc: liblz4.pc.in Makefile
-	@echo creating pkgconfig
-	$(SED) -e 's|@PREFIX@|$(prefix)|' \
-         -e 's|@LIBDIR@|$(libdir)|' \
-         -e 's|@INCLUDEDIR@|$(includedir)|' \
-         -e 's|@VERSION@|$(LIBVER)|' \
-         -e 's|=${prefix}/|=$${prefix}/|' \
-          $< >$@
-
+.PHONY: install
 install: lib liblz4.pc
-	$(INSTALL_DIR) $(DESTDIR)$(pkgconfigdir)/ $(DESTDIR)$(includedir)/ $(DESTDIR)$(libdir)/ $(DESTDIR)$(bindir)/
+	$(MAKE_DIR) $(DESTDIR)$(pkgconfigdir)/ $(DESTDIR)$(includedir)/ $(DESTDIR)$(libdir)/ $(DESTDIR)$(bindir)/
 	$(INSTALL_DATA) liblz4.pc $(DESTDIR)$(pkgconfigdir)/
 	@echo Installing libraries in $(DESTDIR)$(libdir)
   ifeq ($(BUILD_STATIC),yes)
@@ -215,6 +239,7 @@ install: lib liblz4.pc
 	$(INSTALL_DATA) lz4frame.h $(DESTDIR)$(includedir)/lz4frame.h
 	@echo lz4 libraries installed
 
+.PHONY: uninstall
 uninstall:
 	$(RM) $(DESTDIR)$(pkgconfigdir)/liblz4.pc
   ifeq (WINBASED,yes)

lib/README.md

@@ -17,7 +17,7 @@ They generate and decode data using the [LZ4 block format].
 
 #### Level 2 : High Compression variant
 
-For more compression ratio at the cost of compression speed,
+For better compression ratio at the cost of compression speed,
 the High Compression variant called **lz4hc** is available.
 Add files **`lz4hc.c`** and **`lz4hc.h`**.
 This variant also compresses data using the [LZ4 block format],
@@ -108,6 +108,12 @@ The following build macro can be selected to adjust source code behavior at comp
   Remove support of dynamic memory allocation.
   For more details, see description of this macro in `lib/lz4.c`.
 
+- `LZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT` : experimental feature aimed at producing the same
+  compressed output on platforms of different endianness (i.e. little-endian and big-endian).
+  Output on little-endian platforms shall remain unchanged, while big-endian platforms will start producing
+  the same output as little-endian ones. This isn't expected to impact backward- and forward-compatibility
+  in any way.
+
 - `LZ4_FREESTANDING` : by setting this build macro to 1,
   LZ4/HC removes dependencies on the C standard library,
   including allocation functions and `memmove()`, `memcpy()`, and `memset()`.
@@ -131,8 +137,8 @@ The following build macro can be selected to adjust source code behavior at comp
 #### Makefile variables
 
 The following `Makefile` variables can be selected to alter the profile of produced binaries :
-- `BUILD_SHARED` : generate `libzstd` dynamic library (enabled by default)
-- `BUILD_STATIC` : generate `libzstd` static library (enabled by default)
+- `BUILD_SHARED` : generate `liblz4` dynamic library (enabled by default)
+- `BUILD_STATIC` : generate `liblz4` static library (enabled by default)
 
 
 #### Amalgamation

lib/liblz4.pc.in

@@ -9,6 +9,7 @@ includedir=@INCLUDEDIR@
 Name: lz4
 Description: extremely fast lossless compression algorithm library
 URL: http://www.lz4.org/
+License: BSD-2-Clause
 Version: @VERSION@
 Libs: -L${libdir} -llz4
 Cflags: -I${includedir}

lib/lz4.c

@@ -1,6 +1,6 @@
 /*
    LZ4 - Fast LZ compression algorithm
-   Copyright (C) 2011-2020, Yann Collet.
+   Copyright (c) Yann Collet. All rights reserved.
 
    BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
 
@@ -77,7 +77,8 @@
 #ifndef LZ4_FORCE_MEMORY_ACCESS   /* can be defined externally */
 #  if defined(__GNUC__) && \
   ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) \
-  || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
+  || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \
+  || (defined(__riscv) && defined(__riscv_zicclsm)) )
 #    define LZ4_FORCE_MEMORY_ACCESS 2
 #  elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || defined(__GNUC__) || defined(_MSC_VER)
 #    define LZ4_FORCE_MEMORY_ACCESS 1
@@ -106,15 +107,13 @@
 #  define LZ4_SRC_INCLUDED 1
 #endif
 
-#ifndef LZ4_STATIC_LINKING_ONLY
-#define LZ4_STATIC_LINKING_ONLY
-#endif
-
 #ifndef LZ4_DISABLE_DEPRECATE_WARNINGS
-#define LZ4_DISABLE_DEPRECATE_WARNINGS /* due to LZ4_decompress_safe_withPrefix64k */
+#  define LZ4_DISABLE_DEPRECATE_WARNINGS /* due to LZ4_decompress_safe_withPrefix64k */
 #endif
 
-#define LZ4_STATIC_LINKING_ONLY  /* LZ4_DISTANCE_MAX */
+#ifndef LZ4_STATIC_LINKING_ONLY
+#  define LZ4_STATIC_LINKING_ONLY
+#endif
 #include "lz4.h"
 /* see also "memory routines" below */
 
@@ -126,14 +125,17 @@
 #  include <intrin.h>               /* only present in VS2005+ */
 #  pragma warning(disable : 4127)   /* disable: C4127: conditional expression is constant */
 #  pragma warning(disable : 6237)   /* disable: C6237: conditional expression is always 0 */
+#  pragma warning(disable : 6239)   /* disable: C6239: (<non-zero constant> && <expression>) always evaluates to the result of <expression> */
+#  pragma warning(disable : 6240)   /* disable: C6240: (<expression> && <non-zero constant>) always evaluates to the result of <expression> */
+#  pragma warning(disable : 6326)   /* disable: C6326: Potential comparison of a constant with another constant */
 #endif  /* _MSC_VER */
 
 #ifndef LZ4_FORCE_INLINE
-#  ifdef _MSC_VER    /* Visual Studio */
+#  if defined (_MSC_VER) && !defined (__clang__)    /* MSVC */
 #    define LZ4_FORCE_INLINE static __forceinline
 #  else
 #    if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   /* C99 */
-#      ifdef __GNUC__
+#      if defined (__GNUC__) || defined (__clang__)
 #        define LZ4_FORCE_INLINE static inline __attribute__((always_inline))
 #      else
 #        define LZ4_FORCE_INLINE static inline
@@ -300,12 +302,12 @@ static int LZ4_isAligned(const void* ptr, size_t alignment)
 #include <limits.h>
 #if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
 # include <stdint.h>
-  typedef  uint8_t BYTE;
-  typedef uint16_t U16;
-  typedef uint32_t U32;
-  typedef  int32_t S32;
-  typedef uint64_t U64;
-  typedef uintptr_t uptrval;
+  typedef unsigned char BYTE; /*uint8_t not necessarily blessed to alias arbitrary type*/
+  typedef uint16_t      U16;
+  typedef uint32_t      U32;
+  typedef  int32_t      S32;
+  typedef uint64_t      U64;
+  typedef uintptr_t     uptrval;
 #else
 # if UINT_MAX != 4294967295UL
 #   error "LZ4 code (when not C++ or C99) assumes that sizeof(int) == 4"
@@ -432,10 +434,22 @@ static U16 LZ4_readLE16(const void* memPtr)
         return LZ4_read16(memPtr);
     } else {
         const BYTE* p = (const BYTE*)memPtr;
-        return (U16)((U16)p[0] + (p[1]<<8));
+        return (U16)((U16)p[0] | (p[1]<<8));
     }
 }
 
+#ifdef LZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT
+static U32 LZ4_readLE32(const void* memPtr)
+{
+    if (LZ4_isLittleEndian()) {
+        return LZ4_read32(memPtr);
+    } else {
+        const BYTE* p = (const BYTE*)memPtr;
+        return (U32)p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24);
+    }
+}
+#endif
+
 static void LZ4_writeLE16(void* memPtr, U16 value)
 {
     if (LZ4_isLittleEndian()) {
@@ -465,12 +479,7 @@ static const int      dec64table[8] = {0, 0, 0, -1, -4,  1, 2, 3};
 #ifndef LZ4_FAST_DEC_LOOP
 #  if defined __i386__ || defined _M_IX86 || defined __x86_64__ || defined _M_X64
 #    define LZ4_FAST_DEC_LOOP 1
-#  elif defined(__aarch64__) && defined(__APPLE__)
-#    define LZ4_FAST_DEC_LOOP 1
-#  elif defined(__aarch64__) && !defined(__clang__)
-     /* On non-Apple aarch64, we disable this optimization for clang because
-      * on certain mobile chipsets, performance is reduced with clang. For
-      * more information refer to https://github.com/lz4/lz4/pull/707 */
+#  elif defined(__aarch64__)
 #    define LZ4_FAST_DEC_LOOP 1
 #  else
 #    define LZ4_FAST_DEC_LOOP 0
@@ -485,10 +494,9 @@ LZ4_memcpy_using_offset_base(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, con
     assert(srcPtr + offset == dstPtr);
     if (offset < 8) {
         LZ4_write32(dstPtr, 0);   /* silence an msan warning when offset==0 */
-        dstPtr[0] = srcPtr[0];
-        dstPtr[1] = srcPtr[1];
-        dstPtr[2] = srcPtr[2];
-        dstPtr[3] = srcPtr[3];
+        assert(offset != 1);   /* offset==0 happens on testing */
+        LZ4_memcpy(dstPtr, srcPtr, 2);
+        LZ4_memcpy(dstPtr + 2, srcPtr + 2, 2);
         srcPtr += inc32table[offset];
         LZ4_memcpy(dstPtr+4, srcPtr, 4);
         srcPtr -= dec64table[offset];
@@ -502,6 +510,20 @@ LZ4_memcpy_using_offset_base(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, con
     LZ4_wildCopy8(dstPtr, srcPtr, dstEnd);
 }
 
+
+#ifdef __aarch64__
+/* customized variant of memcpy, which can overwrite up to 64 bytes beyond dstEnd */
+LZ4_FORCE_INLINE void
+LZ4_wildCopy64(void* dstPtr, const void* srcPtr, void* dstEnd)
+{
+    BYTE* d = (BYTE*)dstPtr;
+    const BYTE* s = (const BYTE*)srcPtr;
+    BYTE* const e = (BYTE*)dstEnd;
+
+    do { LZ4_memcpy(d,s,64); d+=64; s+=64; } while (d<e);
+}
+#endif
+
 /* customized variant of memcpy, which can overwrite up to 32 bytes beyond dstEnd
  * this version copies two times 16 bytes (instead of one time 32 bytes)
  * because it must be compatible with offsets >= 16. */
@@ -517,7 +539,7 @@ LZ4_wildCopy32(void* dstPtr, const void* srcPtr, void* dstEnd)
 
 /* LZ4_memcpy_using_offset()  presumes :
  * - dstEnd >= dstPtr + MINMATCH
- * - there is at least 8 bytes available to write after dstEnd */
+ * - there is at least 12 bytes available to write after dstEnd */
 LZ4_FORCE_INLINE void
 LZ4_memcpy_using_offset(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, const size_t offset)
 {
@@ -532,12 +554,12 @@ LZ4_memcpy_using_offset(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, const si
     case 2:
         LZ4_memcpy(v, srcPtr, 2);
         LZ4_memcpy(&v[2], srcPtr, 2);
-#if defined(_MSC_VER) && (_MSC_VER <= 1936) /* MSVC 2022 ver 17.6 or earlier */
+#if defined(_MSC_VER) && (_MSC_VER <= 1937) /* MSVC 2022 ver 17.7 or earlier */
 #  pragma warning(push)
 #  pragma warning(disable : 6385) /* warning C6385: Reading invalid data from 'v'. */
 #endif
         LZ4_memcpy(&v[4], v, 4);
-#if defined(_MSC_VER) && (_MSC_VER <= 1936) /* MSVC 2022 ver 17.6 or earlier */
+#if defined(_MSC_VER) && (_MSC_VER <= 1937) /* MSVC 2022 ver 17.7 or earlier */
 #  pragma warning(pop)
 #endif
         break;
@@ -784,7 +806,12 @@ LZ4_FORCE_INLINE U32 LZ4_hash5(U64 sequence, tableType_t const tableType)
 LZ4_FORCE_INLINE U32 LZ4_hashPosition(const void* const p, tableType_t const tableType)
 {
     if ((sizeof(reg_t)==8) && (tableType != byU16)) return LZ4_hash5(LZ4_read_ARCH(p), tableType);
+
+#ifdef LZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT
+    return LZ4_hash4(LZ4_readLE32(p), tableType);
+#else
     return LZ4_hash4(LZ4_read32(p), tableType);
+#endif
 }
 
 LZ4_FORCE_INLINE void LZ4_clearHash(U32 h, void* tableBase, tableType_t const tableType)
@@ -878,7 +905,7 @@ LZ4_prepareTable(LZ4_stream_t_internal* const cctx,
           || tableType == byPtr
           || inputSize >= 4 KB)
         {
-            DEBUGLOG(4, "LZ4_prepareTable: Resetting table in %p", cctx);
+            DEBUGLOG(4, "LZ4_prepareTable: Resetting table in %p", (void*)cctx);
             MEM_INIT(cctx->hashTable, 0, LZ4_HASHTABLESIZE);
             cctx->currentOffset = 0;
             cctx->tableType = (U32)clearedTable;
@@ -903,7 +930,7 @@ LZ4_prepareTable(LZ4_stream_t_internal* const cctx,
     cctx->dictSize = 0;
 }
 
-/** LZ4_compress_generic() :
+/** LZ4_compress_generic_validated() :
  *  inlined, to ensure branches are decided at compilation time.
  *  The following conditions are presumed already validated:
  *  - source != NULL
@@ -1085,7 +1112,10 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
 
         /* Catch up */
         filledIp = ip;
-        while (((ip>anchor) & (match > lowLimit)) && (unlikely(ip[-1]==match[-1]))) { ip--; match--; }
+        assert(ip > anchor); /* this is always true as ip has been advanced before entering the main loop */
+        if ((match > lowLimit) && unlikely(ip[-1] == match[-1])) {
+            do { ip--; match--; } while (((ip > anchor) & (match > lowLimit)) && (unlikely(ip[-1] == match[-1])));
+        }
 
         /* Encode Literals */
         {   unsigned const litLength = (unsigned)(ip - anchor);
@@ -1100,7 +1130,7 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
                 goto _last_literals;
             }
             if (litLength >= RUN_MASK) {
-                int len = (int)(litLength - RUN_MASK);
+                unsigned len = litLength - RUN_MASK;
                 *token = (RUN_MASK<<ML_BITS);
                 for(; len >= 255 ; len-=255) *op++ = 255;
                 *op++ = (BYTE)len;
@@ -1457,22 +1487,30 @@ int LZ4_compress_default(const char* src, char* dst, int srcSize, int dstCapacit
 /* Note!: This function leaves the stream in an unclean/broken state!
  * It is not safe to subsequently use the same state with a _fastReset() or
  * _continue() call without resetting it. */
-static int LZ4_compress_destSize_extState (LZ4_stream_t* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize)
+static int LZ4_compress_destSize_extState_internal(LZ4_stream_t* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration)
 {
     void* const s = LZ4_initStream(state, sizeof (*state));
     assert(s != NULL); (void)s;
 
     if (targetDstSize >= LZ4_compressBound(*srcSizePtr)) {  /* compression success is guaranteed */
-        return LZ4_compress_fast_extState(state, src, dst, *srcSizePtr, targetDstSize, 1);
+        return LZ4_compress_fast_extState(state, src, dst, *srcSizePtr, targetDstSize, acceleration);
     } else {
         if (*srcSizePtr < LZ4_64Klimit) {
-            return LZ4_compress_generic(&state->internal_donotuse, src, dst, *srcSizePtr, srcSizePtr, targetDstSize, fillOutput, byU16, noDict, noDictIssue, 1);
+            return LZ4_compress_generic(&state->internal_donotuse, src, dst, *srcSizePtr, srcSizePtr, targetDstSize, fillOutput, byU16, noDict, noDictIssue, acceleration);
         } else {
             tableType_t const addrMode = ((sizeof(void*)==4) && ((uptrval)src > LZ4_DISTANCE_MAX)) ? byPtr : byU32;
-            return LZ4_compress_generic(&state->internal_donotuse, src, dst, *srcSizePtr, srcSizePtr, targetDstSize, fillOutput, addrMode, noDict, noDictIssue, 1);
+            return LZ4_compress_generic(&state->internal_donotuse, src, dst, *srcSizePtr, srcSizePtr, targetDstSize, fillOutput, addrMode, noDict, noDictIssue, acceleration);
     }   }
 }
 
+int LZ4_compress_destSize_extState(void* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration)
+{
+    int const r = LZ4_compress_destSize_extState_internal((LZ4_stream_t*)state, src, dst, srcSizePtr, targetDstSize, acceleration);
+    /* clean the state on exit */
+    LZ4_initStream(state, sizeof (LZ4_stream_t));
+    return r;
+}
+
 
 int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targetDstSize)
 {
@@ -1484,7 +1522,7 @@ int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targe
     LZ4_stream_t* const ctx = &ctxBody;
 #endif
 
-    int result = LZ4_compress_destSize_extState(ctx, src, dst, srcSizePtr, targetDstSize);
+    int result = LZ4_compress_destSize_extState_internal(ctx, src, dst, srcSizePtr, targetDstSize, 1);
 
 #if (LZ4_HEAPMODE)
     FREEMEM(ctx);
@@ -1503,7 +1541,7 @@ LZ4_stream_t* LZ4_createStream(void)
 {
     LZ4_stream_t* const lz4s = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));
     LZ4_STATIC_ASSERT(sizeof(LZ4_stream_t) >= sizeof(LZ4_stream_t_internal));
-    DEBUGLOG(4, "LZ4_createStream %p", lz4s);
+    DEBUGLOG(4, "LZ4_createStream %p", (void*)lz4s);
     if (lz4s == NULL) return NULL;
     LZ4_initStream(lz4s, sizeof(*lz4s));
     return lz4s;
@@ -1534,7 +1572,7 @@ LZ4_stream_t* LZ4_initStream (void* buffer, size_t size)
  * prefer initStream() which is more general */
 void LZ4_resetStream (LZ4_stream_t* LZ4_stream)
 {
-    DEBUGLOG(5, "LZ4_resetStream (ctx:%p)", LZ4_stream);
+    DEBUGLOG(5, "LZ4_resetStream (ctx:%p)", (void*)LZ4_stream);
     MEM_INIT(LZ4_stream, 0, sizeof(LZ4_stream_t_internal));
 }
 
@@ -1546,15 +1584,18 @@ void LZ4_resetStream_fast(LZ4_stream_t* ctx) {
 int LZ4_freeStream (LZ4_stream_t* LZ4_stream)
 {
     if (!LZ4_stream) return 0;   /* support free on NULL */
-    DEBUGLOG(5, "LZ4_freeStream %p", LZ4_stream);
+    DEBUGLOG(5, "LZ4_freeStream %p", (void*)LZ4_stream);
     FREEMEM(LZ4_stream);
     return (0);
 }
 #endif
 
 
+typedef enum { _ld_fast, _ld_slow } LoadDict_mode_e;
 #define HASH_UNIT sizeof(reg_t)
-int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
+static int LZ4_loadDict_internal(LZ4_stream_t* LZ4_dict,
+                    const char* dictionary, int dictSize,
+                    LoadDict_mode_e _ld)
 {
     LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;
     const tableType_t tableType = byU32;
@@ -1562,7 +1603,7 @@ int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
     const BYTE* const dictEnd = p + dictSize;
     U32 idx32;
 
-    DEBUGLOG(4, "LZ4_loadDict (%i bytes from %p into %p)", dictSize, dictionary, LZ4_dict);
+    DEBUGLOG(4, "LZ4_loadDict (%i bytes from %p into %p)", dictSize, (void*)dictionary, (void*)LZ4_dict);
 
     /* It's necessary to reset the context,
      * and not just continue it with prepareTable()
@@ -1590,20 +1631,46 @@ int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
 
     while (p <= dictEnd-HASH_UNIT) {
         U32 const h = LZ4_hashPosition(p, tableType);
+        /* Note: overwriting => favors positions end of dictionary */
         LZ4_putIndexOnHash(idx32, h, dict->hashTable, tableType);
         p+=3; idx32+=3;
     }
 
+    if (_ld == _ld_slow) {
+        /* Fill hash table with additional references, to improve compression capability */
+        p = dict->dictionary;
+        idx32 = dict->currentOffset - dict->dictSize;
+        while (p <= dictEnd-HASH_UNIT) {
+            U32 const h = LZ4_hashPosition(p, tableType);
+            U32 const limit = dict->currentOffset - 64 KB;
+            if (LZ4_getIndexOnHash(h, dict->hashTable, tableType) <= limit) {
+                /* Note: not overwriting => favors positions beginning of dictionary */
+                LZ4_putIndexOnHash(idx32, h, dict->hashTable, tableType);
+            }
+            p++; idx32++;
+        }
+    }
+
     return (int)dict->dictSize;
 }
 
+int LZ4_loadDict(LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
+{
+    return LZ4_loadDict_internal(LZ4_dict, dictionary, dictSize, _ld_fast);
+}
+
+int LZ4_loadDictSlow(LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
+{
+    return LZ4_loadDict_internal(LZ4_dict, dictionary, dictSize, _ld_slow);
+}
+
 void LZ4_attach_dictionary(LZ4_stream_t* workingStream, const LZ4_stream_t* dictionaryStream)
 {
     const LZ4_stream_t_internal* dictCtx = (dictionaryStream == NULL) ? NULL :
         &(dictionaryStream->internal_donotuse);
 
     DEBUGLOG(4, "LZ4_attach_dictionary (%p, %p, size %u)",
-             workingStream, dictionaryStream,
+             (void*)workingStream, (void*)dictionaryStream,
              dictCtx != NULL ? dictCtx->dictSize : 0);
 
     if (dictCtx != NULL) {
@@ -1667,7 +1734,7 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream,
       && (inputSize > 0)               /* tolerance : don't lose history, in case next invocation would use prefix mode */
       && (streamPtr->dictCtx == NULL)  /* usingDictCtx */
       ) {
-        DEBUGLOG(5, "LZ4_compress_fast_continue: dictSize(%u) at addr:%p is too small", streamPtr->dictSize, streamPtr->dictionary);
+        DEBUGLOG(5, "LZ4_compress_fast_continue: dictSize(%u) at addr:%p is too small", streamPtr->dictSize, (void*)streamPtr->dictionary);
         /* remove dictionary existence from history, to employ faster prefix mode */
         streamPtr->dictSize = 0;
         streamPtr->dictionary = (const BYTE*)source;
@@ -1757,7 +1824,7 @@ int LZ4_saveDict (LZ4_stream_t* LZ4_dict, char* safeBuffer, int dictSize)
 {
     LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;
 
-    DEBUGLOG(5, "LZ4_saveDict : dictSize=%i, safeBuffer=%p", dictSize, safeBuffer);
+    DEBUGLOG(5, "LZ4_saveDict : dictSize=%i, safeBuffer=%p", dictSize, (void*)safeBuffer);
 
     if ((U32)dictSize > 64 KB) { dictSize = 64 KB; } /* useless to define a dictionary > 64 KB */
     if ((U32)dictSize > dict->dictSize) { dictSize = (int)dict->dictSize; }
@@ -1910,36 +1977,37 @@ LZ4_decompress_unsafe_generic(
 
 /* Read the variable-length literal or match length.
  *
- * @ip : input pointer
- * @ilimit : position after which if length is not decoded, the input is necessarily corrupted.
- * @initial_check - check ip >= ipmax before start of loop.  Returns initial_error if so.
- * @error (output) - error code.  Must be set to 0 before call.
+ * @ipPtr : pointer to input pointer, will be advanced
+ * @ilimit : read is forbidden beyond this position (must be within input buffer)
 **/
 typedef size_t Rvl_t;
 static const Rvl_t rvl_error = (Rvl_t)(-1);
 LZ4_FORCE_INLINE Rvl_t
-read_variable_length(const BYTE** ip, const BYTE* ilimit,
-                     int initial_check)
+read_variable_length(const BYTE** ipPtr, const BYTE* ilimit)
 {
     Rvl_t s, length = 0;
-    assert(ip != NULL);
-    assert(*ip !=  NULL);
+    assert(ipPtr != NULL);
+    assert(*ipPtr !=  NULL);
     assert(ilimit != NULL);
-    if (initial_check && unlikely((*ip) >= ilimit)) {    /* read limit reached */
+    if (unlikely((*ipPtr) >= ilimit)) {    /* read limit reached */
         return rvl_error;
     }
+    s = **ipPtr;
+    (*ipPtr)++;
+    length += s;
+    if (likely(s != 255)) return length;
     do {
-        s = **ip;
-        (*ip)++;
+        if (unlikely((*ipPtr) >= ilimit)) {    /* read limit reached */
+            return rvl_error;
+        }
+        s = **ipPtr;
+        (*ipPtr)++;
         length += s;
-        if (unlikely((*ip) > ilimit)) {    /* read limit reached */
-            return rvl_error;
-        }
         /* accumulator overflow detection (32-bit mode only) */
-        if ((sizeof(length)<8) && unlikely(length > ((Rvl_t)(-1)/2)) ) {
+        if ((sizeof(length) < 8) && unlikely(length > ((Rvl_t)(-1)/2)) ) {
             return rvl_error;
         }
-    } while (s==255);
+    } while (s == 255);
 
     return length;
 }
@@ -2005,7 +2073,7 @@ LZ4_decompress_generic(
      * note : fast loop may show a regression for some client arm chips. */
 #if LZ4_FAST_DEC_LOOP
         if ((oend - op) < FASTLOOP_SAFE_DISTANCE) {
-            DEBUGLOG(6, "skip fast decode loop");
+            DEBUGLOG(6, "move to safe decode loop");
             goto safe_decode;
         }
 
@@ -2017,50 +2085,61 @@ LZ4_decompress_generic(
             assert(ip < iend);
             token = *ip++;
             length = token >> ML_BITS;  /* literal length */
+            DEBUGLOG(7, "blockPos%6u: litLength token = %u", (unsigned)(op-(BYTE*)dst), (unsigned)length);
+
+            if (ip > iend-(16 + 1/*max lit + offset + nextToken*/)) { goto safe_literal_copy_early; }
 
             /* decode literal length */
             if (length == RUN_MASK) {
-                size_t const addl = read_variable_length(&ip, iend-RUN_MASK, 1);
+                /* literal length >= RUN_MASK means >= RUN_MASK literal bytes follow the extension bytes,
+                 * so extension bytes cannot reach the last RUN_MASK bytes of input */
+                size_t const addl = read_variable_length(&ip, iend - RUN_MASK);
                 if (addl == rvl_error) {
                     DEBUGLOG(6, "error reading long literal length");
                     goto _output_error;
                 }
                 length += addl;
-                if (unlikely((uptrval)(op)+length<(uptrval)(op))) { goto _output_error; } /* overflow detection */
+                cpy = op+length;
+                if (unlikely((uptrval)(cpy)<(uptrval)(op))) { goto _output_error; } /* overflow detection */
                 if (unlikely((uptrval)(ip)+length<(uptrval)(ip))) { goto _output_error; } /* overflow detection */
 
                 /* copy literals */
                 LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
-                if ((op+length>oend-32) || (ip+length>iend-32)) { goto safe_literal_copy; }
-                LZ4_wildCopy32(op, ip, op+length);
-                ip += length; op += length;
-            } else if (ip <= iend-(16 + 1/*max lit + offset + nextToken*/)) {
-                /* We don't need to check oend, since we check it once for each loop below */
+              #ifdef __aarch64__
+                if ((cpy>oend-64) || (ip+length>iend-64)) { goto safe_literal_copy; }
+                LZ4_wildCopy64(op, ip, cpy);
+              #else
+                if ((cpy>oend-32) || (ip+length>iend-32)) { goto safe_literal_copy; }
+                LZ4_wildCopy32(op, ip, cpy);
+              #endif
+                ip += length; op = cpy;
+            } else {
                 DEBUGLOG(7, "copy %u bytes in a 16-bytes stripe", (unsigned)length);
                 /* Literals can only be <= 14, but hope compilers optimize better when copy by a register size */
                 LZ4_memcpy(op, ip, 16);
                 ip += length; op += length;
-            } else {
-                goto safe_literal_copy;
             }
 
             /* get offset */
             offset = LZ4_readLE16(ip); ip+=2;
-            DEBUGLOG(6, " offset = %zu", offset);
+            DEBUGLOG(6, "blockPos%6u: offset = %u", (unsigned)(op-(BYTE*)dst), (unsigned)offset);
             match = op - offset;
             assert(match <= op);  /* overflow check */
 
             /* get matchlength */
             length = token & ML_MASK;
+            DEBUGLOG(7, "  match length token = %u (len==%u)", (unsigned)length, (unsigned)length+MINMATCH);
 
             if (length == ML_MASK) {
-                size_t const addl = read_variable_length(&ip, iend - LASTLITERALS + 1, 0);
+                /* after match length extension bytes, at least 1 token + LASTLITERALS literals must remain */
+                size_t const addl = read_variable_length(&ip, iend - (1 + LASTLITERALS));
                 if (addl == rvl_error) {
-                    DEBUGLOG(6, "error reading long match length");
+                    DEBUGLOG(5, "error reading long match length");
                     goto _output_error;
                 }
                 length += addl;
                 length += MINMATCH;
+                DEBUGLOG(7, "  long match length == %u", (unsigned)length);
                 if (unlikely((uptrval)(op)+length<(uptrval)op)) { goto _output_error; } /* overflow detection */
                 if (op + length >= oend - FASTLOOP_SAFE_DISTANCE) {
                     goto safe_match_copy;
@@ -2068,6 +2147,7 @@ LZ4_decompress_generic(
             } else {
                 length += MINMATCH;
                 if (op + length >= oend - FASTLOOP_SAFE_DISTANCE) {
+                    DEBUGLOG(7, "moving to safe_match_copy (ml==%u)", (unsigned)length);
                     goto safe_match_copy;
                 }
 
@@ -2086,7 +2166,7 @@ LZ4_decompress_generic(
             }   }   }
 
             if ( checkOffset && (unlikely(match + dictSize < lowPrefix)) ) {
-                DEBUGLOG(6, "Error : pos=%zi, offset=%zi => outside buffers", op-lowPrefix, op-match);
+                DEBUGLOG(5, "Error : pos=%zi, offset=%zi => outside buffers", op-lowPrefix, op-match);
                 goto _output_error;
             }
             /* match starting within external dictionary */
@@ -2125,9 +2205,13 @@ LZ4_decompress_generic(
             /* copy match within block */
             cpy = op + length;
 
-            assert((op <= oend) && (oend-op >= 32));
+            assert((op <= oend) && (oend-op >= 64));
             if (unlikely(offset<16)) {
                 LZ4_memcpy_using_offset(op, match, cpy, offset);
+    #ifdef __aarch64__
+            } else if (offset >= 64) {
+                LZ4_wildCopy64(op, match, cpy);
+    #endif
             } else {
                 LZ4_wildCopy32(op, match, cpy);
             }
@@ -2143,6 +2227,7 @@ LZ4_decompress_generic(
             assert(ip < iend);
             token = *ip++;
             length = token >> ML_BITS;  /* literal length */
+            DEBUGLOG(7, "blockPos%6u: litLength token = %u", (unsigned)(op-(BYTE*)dst), (unsigned)length);
 
             /* A two-stage shortcut for the most common case:
              * 1) If the literal length is 0..14, and there is enough space,
@@ -2163,6 +2248,7 @@ LZ4_decompress_generic(
                 /* The second stage: prepare for match copying, decode full info.
                  * If it doesn't work out, the info won't be wasted. */
                 length = token & ML_MASK; /* match length */
+                DEBUGLOG(7, "blockPos%6u: matchLength token = %u (len=%u)", (unsigned)(op-(BYTE*)dst), (unsigned)length, (unsigned)length + 4);
                 offset = LZ4_readLE16(ip); ip += 2;
                 match = op - offset;
                 assert(match <= op); /* check overflow */
@@ -2185,20 +2271,27 @@ LZ4_decompress_generic(
                 goto _copy_match;
             }
 
+#if LZ4_FAST_DEC_LOOP
+        safe_literal_copy_early:
+#endif
+
             /* decode literal length */
             if (length == RUN_MASK) {
-                size_t const addl = read_variable_length(&ip, iend-RUN_MASK, 1);
+                /* literal length >= RUN_MASK means >= RUN_MASK literal bytes follow the extension bytes,
+                 * so extension bytes cannot reach the last RUN_MASK bytes of input */
+                size_t const addl = read_variable_length(&ip, iend-RUN_MASK);
                 if (addl == rvl_error) { goto _output_error; }
                 length += addl;
                 if (unlikely((uptrval)(op)+length<(uptrval)(op))) { goto _output_error; } /* overflow detection */
                 if (unlikely((uptrval)(ip)+length<(uptrval)(ip))) { goto _output_error; } /* overflow detection */
             }
 
+            /* copy literals */
+            cpy = op+length;
+
 #if LZ4_FAST_DEC_LOOP
         safe_literal_copy:
 #endif
-            /* copy literals */
-            cpy = op+length;
 
             LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
             if ((cpy>oend-MFLIMIT) || (ip+length>iend-(2+1+LASTLITERALS))) {
@@ -2235,9 +2328,10 @@ LZ4_decompress_generic(
                       * so check that we exactly consume the input and don't overrun the output buffer.
                       */
                     if ((ip+length != iend) || (cpy > oend)) {
-                        DEBUGLOG(6, "should have been last run of literals")
-                        DEBUGLOG(6, "ip(%p) + length(%i) = %p != iend (%p)", ip, (int)length, ip+length, iend);
-                        DEBUGLOG(6, "or cpy(%p) > oend(%p)", cpy, oend);
+                        DEBUGLOG(5, "should have been last run of literals")
+                        DEBUGLOG(5, "ip(%p) + length(%i) = %p != iend (%p)", (void*)ip, (int)length, (void*)(ip+length), (void*)iend);
+                        DEBUGLOG(5, "or cpy(%p) > (oend-MFLIMIT)(%p)", (void*)cpy, (void*)(oend-MFLIMIT));
+                        DEBUGLOG(5, "after writing %u bytes / %i bytes available", (unsigned)(op-(BYTE*)dst), outputSize);
                         goto _output_error;
                     }
                 }
@@ -2263,10 +2357,12 @@ LZ4_decompress_generic(
 
             /* get matchlength */
             length = token & ML_MASK;
+            DEBUGLOG(7, "blockPos%6u: matchLength token = %u", (unsigned)(op-(BYTE*)dst), (unsigned)length);
 
     _copy_match:
             if (length == ML_MASK) {
-                size_t const addl = read_variable_length(&ip, iend - LASTLITERALS + 1, 0);
+                /* after match length extension bytes, at least 1 token + LASTLITERALS literals must remain */
+                size_t const addl = read_variable_length(&ip, iend - (1 + LASTLITERALS));
                 if (addl == rvl_error) { goto _output_error; }
                 length += addl;
                 if (unlikely((uptrval)(op)+length<(uptrval)op)) goto _output_error;   /* overflow detection */
@@ -2352,7 +2448,7 @@ LZ4_decompress_generic(
                 while (op < cpy) { *op++ = *match++; }
             } else {
                 LZ4_memcpy(op, match, 8);
-                if (length > 16)  { LZ4_wildCopy8(op+8, match+8, cpy); }
+                if (length > 16) { LZ4_wildCopy8(op+8, match+8, cpy); }
             }
             op = cpy;   /* wildcopy correction */
         }

lib/lz4.h

@@ -1,7 +1,7 @@
 /*
  *  LZ4 - Fast LZ compression algorithm
  *  Header File
- *  Copyright (C) 2011-2020, Yann Collet.
+ *  Copyright (c) Yann Collet. All rights reserved.
 
    BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
 
@@ -129,8 +129,8 @@ extern "C" {
 
 /*------   Version   ------*/
 #define LZ4_VERSION_MAJOR    1    /* for breaking interface changes  */
-#define LZ4_VERSION_MINOR    9    /* for new (non-breaking) interface capabilities */
-#define LZ4_VERSION_RELEASE  4    /* for tweaks, bug-fixes, or development */
+#define LZ4_VERSION_MINOR   10    /* for new (non-breaking) interface capabilities */
+#define LZ4_VERSION_RELEASE  0    /* for tweaks, bug-fixes, or development */
 
 #define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
 
@@ -144,23 +144,25 @@ LZ4LIB_API const char* LZ4_versionString (void);   /**< library version string;
 
 
 /*-************************************
-*  Tuning parameter
+*  Tuning memory usage
 **************************************/
-#define LZ4_MEMORY_USAGE_MIN 10
-#define LZ4_MEMORY_USAGE_DEFAULT 14
-#define LZ4_MEMORY_USAGE_MAX 20
-
 /*!
  * LZ4_MEMORY_USAGE :
- * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; )
- * Increasing memory usage improves compression ratio, at the cost of speed.
+ * Can be selected at compile time, by setting LZ4_MEMORY_USAGE.
+ * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB)
+ * Increasing memory usage improves compression ratio, generally at the cost of speed.
  * Reduced memory usage may improve speed at the cost of ratio, thanks to better cache locality.
- * Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
+ * Default value is 14, for 16KB, which nicely fits into most L1 caches.
  */
 #ifndef LZ4_MEMORY_USAGE
 # define LZ4_MEMORY_USAGE LZ4_MEMORY_USAGE_DEFAULT
 #endif
 
+/* These are absolute limits, they should not be changed by users */
+#define LZ4_MEMORY_USAGE_MIN 10
+#define LZ4_MEMORY_USAGE_DEFAULT 14
+#define LZ4_MEMORY_USAGE_MAX 20
+
 #if (LZ4_MEMORY_USAGE < LZ4_MEMORY_USAGE_MIN)
 #  error "LZ4_MEMORY_USAGE is too small !"
 #endif
@@ -191,7 +193,7 @@ LZ4LIB_API int LZ4_compress_default(const char* src, char* dst, int srcSize, int
 /*! LZ4_decompress_safe() :
  * @compressedSize : is the exact complete size of the compressed block.
  * @dstCapacity : is the size of destination buffer (which must be already allocated),
- *                is an upper bound of decompressed size.
+ *                presumed an upper bound of decompressed size.
  * @return : the number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
  *           If destination buffer is not large enough, decoding will stop and output an error code (negative value).
  *           If the source stream is detected malformed, the function will stop decoding and return a negative result.
@@ -243,23 +245,25 @@ LZ4LIB_API int LZ4_compress_fast (const char* src, char* dst, int srcSize, int d
 LZ4LIB_API int LZ4_sizeofState(void);
 LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
 
-
 /*! LZ4_compress_destSize() :
  *  Reverse the logic : compresses as much data as possible from 'src' buffer
- *  into already allocated buffer 'dst', of size >= 'targetDestSize'.
+ *  into already allocated buffer 'dst', of size >= 'dstCapacity'.
  *  This function either compresses the entire 'src' content into 'dst' if it's large enough,
  *  or fill 'dst' buffer completely with as much data as possible from 'src'.
  *  note: acceleration parameter is fixed to "default".
  *
- * *srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
+ * *srcSizePtr : in+out parameter. Initially contains size of input.
+ *               Will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
  *               New value is necessarily <= input value.
- * @return : Nb bytes written into 'dst' (necessarily <= targetDestSize)
+ * @return : Nb bytes written into 'dst' (necessarily <= dstCapacity)
  *           or 0 if compression fails.
  *
- * Note : from v1.8.2 to v1.9.1, this function had a bug (fixed in v1.9.2+):
- *        the produced compressed content could, in specific circumstances,
- *        require to be decompressed into a destination buffer larger
- *        by at least 1 byte than the content to decompress.
+ * Note : 'targetDstSize' must be >= 1, because it's the smallest valid lz4 payload.
+ *
+ * Note 2:from v1.8.2 to v1.9.1, this function had a bug (fixed in v1.9.2+):
+ *        the produced compressed content could, in rare circumstances,
+ *        require to be decompressed into a destination buffer
+ *        larger by at least 1 byte than decompressesSize.
  *        If an application uses `LZ4_compress_destSize()`,
  *        it's highly recommended to update liblz4 to v1.9.2 or better.
  *        If this can't be done or ensured,
@@ -267,8 +271,7 @@ LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* src, char* d
  *        a dstCapacity which is > decompressedSize, by at least 1 byte.
  *        See https://github.com/lz4/lz4/issues/859 for details
  */
-LZ4LIB_API int LZ4_compress_destSize (const char* src, char* dst, int* srcSizePtr, int targetDstSize);
-
+LZ4LIB_API int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targetDstSize);
 
 /*! LZ4_decompress_safe_partial() :
  *  Decompress an LZ4 compressed block, of size 'srcSize' at position 'src',
@@ -312,7 +315,7 @@ LZ4LIB_API int LZ4_decompress_safe_partial (const char* src, char* dst, int srcS
 ***********************************************/
 typedef union LZ4_stream_u LZ4_stream_t;  /* incomplete type (defined later) */
 
-/**
+/*!
  Note about RC_INVOKED
 
  - RC_INVOKED is predefined symbol of rc.exe (the resource compiler which is part of MSVC/Visual Studio).
@@ -362,13 +365,58 @@ LZ4LIB_API void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
  *  LZ4_loadDict() triggers a reset, so any previous data will be forgotten.
  *  The same dictionary will have to be loaded on decompression side for successful decoding.
  *  Dictionary are useful for better compression of small data (KB range).
- *  While LZ4 accept any input as dictionary,
- *  results are generally better when using Zstandard's Dictionary Builder.
+ *  While LZ4 itself accepts any input as dictionary, dictionary efficiency is also a topic.
+ *  When in doubt, employ the Zstandard's Dictionary Builder.
  *  Loading a size of 0 is allowed, and is the same as reset.
- * @return : loaded dictionary size, in bytes (necessarily <= 64 KB)
+ * @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
  */
 LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
 
+/*! LZ4_loadDictSlow() : v1.10.0+
+ *  Same as LZ4_loadDict(),
+ *  but uses a bit more cpu to reference the dictionary content more thoroughly.
+ *  This is expected to slightly improve compression ratio.
+ *  The extra-cpu cost is likely worth it if the dictionary is re-used across multiple sessions.
+ * @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
+ */
+LZ4LIB_API int LZ4_loadDictSlow(LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
+
+/*! LZ4_attach_dictionary() : stable since v1.10.0
+ *
+ *  This allows efficient re-use of a static dictionary multiple times.
+ *
+ *  Rather than re-loading the dictionary buffer into a working context before
+ *  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
+ *  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
+ *  in which the working stream references @dictionaryStream in-place.
+ *
+ *  Several assumptions are made about the state of @dictionaryStream.
+ *  Currently, only states which have been prepared by LZ4_loadDict() or
+ *  LZ4_loadDictSlow() should be expected to work.
+ *
+ *  Alternatively, the provided @dictionaryStream may be NULL,
+ *  in which case any existing dictionary stream is unset.
+ *
+ *  If a dictionary is provided, it replaces any pre-existing stream history.
+ *  The dictionary contents are the only history that can be referenced and
+ *  logically immediately precede the data compressed in the first subsequent
+ *  compression call.
+ *
+ *  The dictionary will only remain attached to the working stream through the
+ *  first compression call, at the end of which it is cleared.
+ * @dictionaryStream stream (and source buffer) must remain in-place / accessible / unchanged
+ *  through the completion of the compression session.
+ *
+ *  Note: there is no equivalent LZ4_attach_*() method on the decompression side
+ *  because there is no initialization cost, hence no need to share the cost across multiple sessions.
+ *  To decompress LZ4 blocks using dictionary, attached or not,
+ *  just employ the regular LZ4_setStreamDecode() for streaming,
+ *  or the stateless LZ4_decompress_safe_usingDict() for one-shot decompression.
+ */
+LZ4LIB_API void
+LZ4_attach_dictionary(LZ4_stream_t* workingStream,
+                const LZ4_stream_t* dictionaryStream);
+
 /*! LZ4_compress_fast_continue() :
  *  Compress 'src' content using data from previously compressed blocks, for better compression ratio.
  * 'dst' buffer must be already allocated.
@@ -546,9 +594,9 @@ LZ4_decompress_safe_partial_usingDict(const char* src, char* dst,
 #define LZ4_STATIC_3504398509
 
 #ifdef LZ4_PUBLISH_STATIC_FUNCTIONS
-#define LZ4LIB_STATIC_API LZ4LIB_API
+# define LZ4LIB_STATIC_API LZ4LIB_API
 #else
-#define LZ4LIB_STATIC_API
+# define LZ4LIB_STATIC_API
 #endif
 
 
@@ -564,36 +612,11 @@ LZ4_decompress_safe_partial_usingDict(const char* src, char* dst,
  */
 LZ4LIB_STATIC_API int LZ4_compress_fast_extState_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
 
-/*! LZ4_attach_dictionary() :
- *  This is an experimental API that allows
- *  efficient use of a static dictionary many times.
- *
- *  Rather than re-loading the dictionary buffer into a working context before
- *  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
- *  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
- *  in which the working stream references the dictionary stream in-place.
- *
- *  Several assumptions are made about the state of the dictionary stream.
- *  Currently, only streams which have been prepared by LZ4_loadDict() should
- *  be expected to work.
- *
- *  Alternatively, the provided dictionaryStream may be NULL,
- *  in which case any existing dictionary stream is unset.
- *
- *  If a dictionary is provided, it replaces any pre-existing stream history.
- *  The dictionary contents are the only history that can be referenced and
- *  logically immediately precede the data compressed in the first subsequent
- *  compression call.
- *
- *  The dictionary will only remain attached to the working stream through the
- *  first compression call, at the end of which it is cleared. The dictionary
- *  stream (and source buffer) must remain in-place / accessible / unchanged
- *  through the completion of the first compression call on the stream.
+/*! LZ4_compress_destSize_extState() : introduced in v1.10.0
+ *  Same as LZ4_compress_destSize(), but using an externally allocated state.
+ *  Also: exposes @acceleration
  */
-LZ4LIB_STATIC_API void
-LZ4_attach_dictionary(LZ4_stream_t* workingStream,
-                const LZ4_stream_t* dictionaryStream);
-
+int LZ4_compress_destSize_extState(void* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration);
 
 /*! In-place compression and decompression
  *
@@ -677,10 +700,10 @@ LZ4_attach_dictionary(LZ4_stream_t* workingStream,
 
 #if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
 # include <stdint.h>
-  typedef  int8_t  LZ4_i8;
-  typedef uint8_t  LZ4_byte;
-  typedef uint16_t LZ4_u16;
-  typedef uint32_t LZ4_u32;
+  typedef int8_t         LZ4_i8;
+  typedef unsigned char  LZ4_byte;
+  typedef uint16_t       LZ4_u16;
+  typedef uint32_t       LZ4_u32;
 #else
   typedef   signed char  LZ4_i8;
   typedef unsigned char  LZ4_byte;
@@ -705,7 +728,7 @@ struct LZ4_stream_t_internal {
     /* Implicit padding to ensure structure is aligned */
 };
 
-#define LZ4_STREAM_MINSIZE  ((1UL << LZ4_MEMORY_USAGE) + 32)  /* static size, for inter-version compatibility */
+#define LZ4_STREAM_MINSIZE  ((1UL << (LZ4_MEMORY_USAGE)) + 32)  /* static size, for inter-version compatibility */
 union LZ4_stream_u {
     char minStateSize[LZ4_STREAM_MINSIZE];
     LZ4_stream_t_internal internal_donotuse;
@@ -726,7 +749,7 @@ union LZ4_stream_u {
  *  Note2: An LZ4_stream_t structure guarantees correct alignment and size.
  *  Note3: Before v1.9.0, use LZ4_resetStream() instead
 **/
-LZ4LIB_API LZ4_stream_t* LZ4_initStream (void* buffer, size_t size);
+LZ4LIB_API LZ4_stream_t* LZ4_initStream (void* stateBuffer, size_t size);
 
 
 /*! LZ4_streamDecode_t :
@@ -838,11 +861,12 @@ LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") LZ4LIB_API int LZ4
  *         But they may happen if input data is invalid (error or intentional tampering).
  *         As a consequence, use these functions in trusted environments with trusted data **only**.
  */
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial() instead")
 LZ4LIB_API int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_continue() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider migrating towards LZ4_decompress_safe_continue() instead. "
+               "Note that the contract will change (requires block's compressed size, instead of decompressed size)")
 LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_usingDict() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial_usingDict() instead")
 LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize, const char* dictStart, int dictSize);
 
 /*! LZ4_resetStream() :