Update to lz4 1.10.0

lz4.mod/common.bmx

@@ -1,4 +1,4 @@
-' Copyright (c) 2022-2023 Bruce A Henderson
+' Copyright (c) 2022-2025 Bruce A Henderson
 ' All rights reserved.
 '
 ' Redistribution and use in source and binary forms, with or without

lz4.mod/lz4.bmx

@@ -1,4 +1,4 @@
-' Copyright (c) 2022-2023 Bruce A Henderson
+' Copyright (c) 2022-2025 Bruce A Henderson
 ' All rights reserved.
 '
 ' Redistribution and use in source and binary forms, with or without
@@ -24,10 +24,12 @@ SuperStrict
 
 Module Archive.Lz4
 
-ModuleInfo "Version: 1.01"
+ModuleInfo "Version: 1.02"
 ModuleInfo "License: BSD"
-ModuleInfo "Copyright: Wrapper - 2022-2023 Bruce A Henderson"
+ModuleInfo "Copyright: Wrapper - 2022-2025 Bruce A Henderson"
 
+ModuleInfo "History: 1.02"
+ModuleInfo "History: Update to lz4 1.10.0"
 ModuleInfo "History: 1.01"
 ModuleInfo "History: Update to lz4 1.9.4"
 ModuleInfo "History: 1.00"

lz4.mod/lz4/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.

lz4.mod/lz4/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.

lz4.mod/lz4/Makefile

@@ -1,6 +1,6 @@
 # ################################################################
 # LZ4 - Makefile
-# Copyright (C) Yann Collet 2011-2020
+# Copyright (C) Yann Collet 2011-2023
 # All rights reserved.
 #
 # BSD license
@@ -61,7 +61,8 @@ 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
@@ -84,7 +85,7 @@ 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
 
 
@@ -99,8 +100,8 @@ install uninstall:
 	$(MAKE) -C $(LZ4DIR) $@
 	$(MAKE) -C $(PRGDIR) $@
 
-.PHONY: travis-install
-travis-install:
+.PHONY: test-install
+test-install:
 	$(MAKE) -j1 install DESTDIR=~/install_test_dir
 
 endif   # POSIX_ENV
@@ -113,11 +114,18 @@ 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 +145,6 @@ 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 $(TESTDIR) native CC=clang
-
 .PHONY: usan
 usan: CC      = clang
 usan: CFLAGS  = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
@@ -162,10 +153,10 @@ usan: clean
 	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
 
 .PHONY: usan32
-usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined
+usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
 usan32: LDFLAGS = $(CFLAGS)
 usan32: clean
-	$(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
+	CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) V=1 test FUZZER_TIME="-T30s" NB_LOOPS=-i1
 
 SCANBUILD ?= scan-build
 SCANBUILD_FLAGS += --status-bugs -v --force-analyze-debug-code
@@ -181,24 +172,36 @@ 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="$(CXX) -Wno-deprecated"
+ctocxxtest: CFLAGS=-O0
+ctocxxtest:
+	CC=$(LIBCC) $(MAKE) -C $(LZ4DIR)  CFLAGS="$(CFLAGS)" 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)"
@@ -206,34 +209,25 @@ cxxtest cxx32test: clean
 
 .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
@@ -243,7 +237,8 @@ c_standards_c11: clean
 # 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
+standard_variables:
+	$(MAKE) clean
 	@echo =================
 	@echo Check support of Makefile Standard variables through environment
 	@echo note : this test requires V=1 to work properly
@@ -259,13 +254,13 @@ standard_variables: clean
 	# 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,
+	# because quantities (10, 2 and 1) can still evolve in future,
 	# for example when source directories or Makefile evolve.
-	if [ $$(grep CC_TEST tmpsv | wc -l) -ne 7 ]; then \
+	if [ $$(grep CC_TEST tmpsv | wc -l) -ne 10 ]; then \
 		echo "CC environment variable missed" && False; fi
-	if [ $$(grep CFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
+	if [ $$(grep CFLAGS_TEST tmpsv | wc -l) -ne 10 ]; then \
 		echo "CFLAGS environment variable missed" && False; fi
-	if [ $$(grep CPPFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
+	if [ $$(grep CPPFLAGS_TEST tmpsv | wc -l) -ne 10 ]; 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

lz4.mod/lz4/Makefile.inc

@@ -38,26 +38,26 @@ ifeq ($(TARGET_OS),)
 endif
 
 ifneq (,$(filter Windows%,$(TARGET_OS)))
-LIBLZ4 = liblz4-$(LIBVER_MAJOR)
-LIBLZ4_EXP = liblz4.lib
-WINBASED   = yes
+LIBLZ4_NAME = liblz4-$(LIBVER_MAJOR)
+LIBLZ4_EXP  = liblz4.lib
+WINBASED    = yes
 else
-LIBLZ4_EXP = liblz4.dll.a
+LIBLZ4_EXP  = liblz4.dll.a
   ifneq (,$(filter MINGW%,$(TARGET_OS)))
-LIBLZ4     = liblz4
-WINBASED   = yes
+LIBLZ4_NAME = liblz4
+WINBASED    = yes
   else
     ifneq (,$(filter MSYS%,$(TARGET_OS)))
-LIBLZ4     = msys-lz4-$(LIBVER_MAJOR)
-WINBASED   = yes
+LIBLZ4_NAME = msys-lz4-$(LIBVER_MAJOR)
+WINBASED    = yes
     else
       ifneq (,$(filter CYGWIN%,$(TARGET_OS)))
-LIBLZ4     = cyglz4-$(LIBVER_MAJOR)
-WINBASED   = yes
+LIBLZ4_NAME = cyglz4-$(LIBVER_MAJOR)
+WINBASED    = yes
       else
-LIBLZ4     = liblz4.$(SHARED_EXT_VER)
-WINBASED   = no
-EXT        =
+LIBLZ4_NAME = liblz4
+WINBASED    = no
+EXT         =
       endif
     endif
   endif
@@ -65,9 +65,11 @@ endif
 
 ifeq ($(WINBASED),yes)
 EXT        = .exe
-WINDRES    = windres
+WINDRES ?= windres
 endif
 
+LIBLZ4      = $(LIBLZ4_NAME).$(SHARED_EXT_VER)
+
 #determine if dev/nul based on host environment
 ifneq (,$(filter MINGW% MSYS% CYGWIN%,$(shell $(UNAME))))
 VOID := /dev/null
@@ -108,4 +110,4 @@ endif
 
 INSTALL_PROGRAM ?= $(INSTALL) -m 755
 INSTALL_DATA    ?= $(INSTALL) -m 644
-INSTALL_DIR     ?= $(INSTALL) -d -m 755
+MAKE_DIR        ?= $(INSTALL) -d -m 755

lz4.mod/lz4/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
@@ -9,6 +33,7 @@ api  : new experimental function `LZ4F_uncompressedUpdate()`, by @alexmohr
 cli  : `--list` works on `stdin` input, by @Low-power
 cli  : `--no-crc` does not produce (compression) nor check (decompression) checksums
 cli  : fix: `--test` and `--list` produce an error code when parsing invalid input
+cli  : fix: `--test -m` does no longer create decompressed file artifacts
 cli  : fix: support skippable frames when passed via `stdin`, reported by @davidmankin
 build: fix: Makefile respects CFLAGS directives passed via environment variable
 build: `LZ4_FREESTANDING`, new build macro for freestanding environments, by @t-mat

lz4.mod/lz4/README.md

@@ -26,10 +26,8 @@ LZ4 library is provided as open-source software using BSD 2-Clause license.
 
 |Branch      |Status   |
 |------------|---------|
-|dev         | [![Build Status][travisDevBadge]][travisLink]    [![Build status][AppveyorDevBadge]][AppveyorLink]                                         |
+|dev         | [![Build status][AppveyorDevBadge]][AppveyorLink]  |
 
-[travisDevBadge]: https://travis-ci.org/lz4/lz4.svg?branch=dev "Continuous Integration test suite"
-[travisLink]: https://travis-ci.org/lz4/lz4
 [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
 
@@ -62,7 +60,7 @@ in single-thread mode.
 [zlib]: http://www.zlib.net/
 [Zstandard]: http://www.zstd.net/
 
-LZ4 is also compatible and optimized for x32 mode,
+LZ4 is also compatible and optimized for x32 mode (`-mx32`),
 for which it provides additional speed performance.
 
 
@@ -91,7 +89,7 @@ You can download and install LZ4 using the [vcpkg](https://github.com/Microsoft/
     cd vcpkg
     ./bootstrap-vcpkg.sh
     ./vcpkg integrate install
-    vcpkg install lz4
+    ./vcpkg.exe install lz4
 
 The LZ4 port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
 
@@ -118,3 +116,16 @@ many contributors have created versions of lz4 in multiple languages
 A list of known source ports is maintained on the [LZ4 Homepage].
 
 [LZ4 Homepage]: http://www.lz4.org
+
+### Packaging status
+
+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)
+
+
+### Special Thanks
+
+- Takayuki Matsuoka, aka @t-mat, for exceptional first-class support throughout the lifetime of this project

lz4.mod/lz4/SECURITY.md

@@ -0,0 +1,17 @@
+# Security Policy
+
+If you have discovered a security vulnerability in this project, please report it
+privately. **Do not disclose it as a public issue.** This gives me time to work with you
+to fix the issue before public exposure, reducing the chance that the exploit will be
+used before a patch is released.
+
+Please submit the report by filling out
+[this form](https://github.com/lz4/lz4/security/advisories/new).
+
+Please provide the following information in your report:
+
+- A description of the vulnerability and its impact
+- How to reproduce the issue
+
+This project is maintained by a single maintainer on a reasonable-effort basis. As such,
+I ask that you give me 90 days to work on a fix before public exposure.

lz4.mod/lz4/appveyor.yml

@@ -1,13 +1,8 @@
 version: 1.0.{build}
 environment:
   matrix:
-  - COMPILER: "gcc"
-    PLATFORM: "mingw64"
   - COMPILER: "gcc"
     PLATFORM: "mingw32"
-  - COMPILER: "visual"
-    CONFIGURATION: "Debug"
-    PLATFORM: "x64"
   - COMPILER: "visual"
     CONFIGURATION: "Debug"
     PLATFORM: "Win32"
@@ -17,48 +12,53 @@ environment:
   - COMPILER: "visual"
     CONFIGURATION: "Release"
     PLATFORM: "Win32"
+  - COMPILER: "clang"
+    PLATFORM: "mingw64"
   - COMPILER: "gcc"
-    PLATFORM: "clang"
+    PLATFORM: "mingw64"
 
 install:
   - ECHO Installing %COMPILER% %PLATFORM% %CONFIGURATION%
   - MKDIR bin
-  - if [%COMPILER%]==[gcc] SET PATH_ORIGINAL=%PATH%
-  - if [%COMPILER%]==[gcc] (
+  - if [%COMPILER%]==[visual] (
+      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;"
+      )
+    ) else (
       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;")
     )
 
 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%
+  - if [%PLATFORM%]==[mingw32] SET PATH=%PATH_MINGW32%;%PATH%
+  - if [%PLATFORM%]==[mingw64] SET PATH=%PATH_MINGW64%;%PATH%
   - ECHO *** &&
       ECHO Building %COMPILER% %PLATFORM% %CONFIGURATION% &&
       ECHO ***
-  - if [%PLATFORM%]==[clang] (clang -v)
-  - if [%COMPILER%]==[gcc] (gcc -v)
   - if [%COMPILER%]==[gcc] (
+      echo ----- %TIME% &&
+      gcc -v &&
+      make -v &&
       echo ----- &&
+      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
+    )
+  - if [%COMPILER%]==[clang] (
+      echo ----- %TIME% &&
+      clang -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"
-      )
+      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
     )
-  - if [%COMPILER%]==[gcc] if not [%PLATFORM%]==[clang] (
+  - if [%COMPILER%]==[gcc] (
       MKDIR bin\dll bin\static bin\example bin\include &&
       COPY tests\fullbench.c bin\example\ &&
       COPY lib\xxhash.c bin\example\ &&
@@ -67,7 +67,7 @@ build_script:
       COPY lib\lz4hc.h bin\include\ &&
       COPY lib\lz4frame.h bin\include\ &&
       COPY lib\liblz4.a bin\static\liblz4_static.lib &&
-      COPY lib\dll\* bin\dll\ &&
+      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\ &&
@@ -81,29 +81,22 @@ build_script:
       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 *** %TIME% &&
       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 *** &&
+      msbuild "build\VS2022\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v110 /property:Optimize=false /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
+      ECHO *** %TIME% &&
       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\
+      msbuild "build\VS2022\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v120 /property:Optimize=false /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
+      COPY build\VS2022\bin\%PLATFORM%_%CONFIGURATION%\*.exe programs\
+    ) else (
+      COPY tests\*.exe programs\
     )
 
 test_script:
-  - ECHO *** &&
+  - ECHO *** %TIME% &&
       ECHO Testing %COMPILER% %PLATFORM% %CONFIGURATION% &&
       ECHO ***
   - if not [%COMPILER%]==[unknown] (
@@ -114,10 +107,11 @@ test_script:
       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
+      fullbench.exe -i0 fullbench.exe &&
+      echo Launching test program fuzzer.exe &&
+      fuzzer.exe -v -T20s
     )
+  - ECHO *** %TIME%
 
 artifacts:
   - path: bin\lz4_x64.zip

lz4.mod/lz4/build/.gitignore

@@ -9,8 +9,10 @@
 ver*/
 VS2010/bin/
 VS2017/bin/
+VS*/bin/
 ipch
 
 # Fixup for lz4 project directories
 !VS2010/lz4
 !VS2017/lz4
+!VS*/lz4

lz4.mod/lz4/build/README.md

@@ -5,23 +5,12 @@ Projects for various integrated development environments (IDE)
 
 The following projects are included with the lz4 distribution:
 - `cmake` - CMake project
-- `VS2010` - Visual Studio 2010 project (which also works well with Visual Studio 2012, 2013, 2015)
-- `VS2017` - Visual Studio 2017 project
+- `meson` - Meson 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

lz4.mod/lz4/build/VS2010/datagen/datagen.vcxproj

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-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
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-    <Keyword>Win32Proj</Keyword>
-    <RootNamespace>datagen</RootNamespace>
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
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lz4.mod/lz4/build/VS2010/frametest/frametest.vcxproj

@@ -1,176 +0,0 @@
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-    <Keyword>Win32Proj</Keyword>
-    <RootNamespace>frametest</RootNamespace>
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
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lz4.mod/lz4/build/VS2010/liblz4-dll/liblz4-dll.rc

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-//
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-#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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-  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
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-            VALUE "FileDescription", "Extremely fast compression"
-            VALUE "FileVersion", LZ4_VERSION_STRING
-            VALUE "InternalName", "lz4.dll"
-            VALUE "LegalCopyright", "Copyright (C) 2013-2020, Yann Collet"
-            VALUE "OriginalFilename", "lz4.dll"
-            VALUE "ProductName", "LZ4"
-            VALUE "ProductVersion", LZ4_VERSION_STRING
-        END
-    END
-    BLOCK "VarFileInfo"
-    BEGIN
-        VALUE "Translation", 0x0409, 1200
-    END
-END
-
-#endif

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lz4.mod/lz4/build/VS2017/fuzzer/fuzzer.vcxproj

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lz4.mod/lz4/build/VS2017/liblz4-dll/liblz4-dll.rc

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lz4.mod/lz4/build/VS2017/liblz4/liblz4.vcxproj

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lz4.mod/lz4/build/VS2017/lz4.sln

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lz4.mod/lz4/build/VS2017/lz4/lz4.rc

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-//
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-#define APSTUDIO_READONLY_SYMBOLS
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-
-
-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-LANGUAGE 9, 1
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-/////////////////////////////////////////////////////////////////////////////
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-//
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-  PRODUCTVERSION    LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
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- FILEFLAGS 0x0L
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-    BEGIN
-        BLOCK "040904B0"
-        BEGIN
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-            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

lz4.mod/lz4/build/VS2022/_build.bat

@@ -0,0 +1,39 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+rem https://docs.microsoft.com/visualstudio/msbuild/msbuild-command-line-reference
+
+set "sln=lz4.sln"
+
+@rem set "Configuration=Debug"
+@rem set "Platform=Win32"
+
+set "BIN=.\bin\!Platform!_!Configuration!"
+rmdir /S /Q "!BIN!" 2>nul
+echo msbuild "%sln%" /p:Configuration=!Configuration! /p:Platform=!Platform!
+msbuild "%sln%"                          ^
+        /nologo                          ^
+        /v:minimal                       ^
+        /m                               ^
+        /p:Configuration=!Configuration! ^
+        /p:Platform=!Platform!           ^
+        /t:Clean,Build                   ^
+        || goto :ERROR
+
+if not exist "!BIN!\datagen.exe"       ( echo FAIL: "!BIN!\datagen.exe"       && goto :ERROR )
+if not exist "!BIN!\frametest.exe"     ( echo FAIL: "!BIN!\frametest.exe"     && goto :ERROR )
+if not exist "!BIN!\fullbench-dll.exe" ( echo FAIL: "!BIN!\fullbench-dll.exe" && goto :ERROR )
+if not exist "!BIN!\fullbench.exe"     ( echo FAIL: "!BIN!\fullbench.exe"     && goto :ERROR )
+if not exist "!BIN!\fuzzer.exe"        ( echo FAIL: "!BIN!\fuzzer.exe"        && goto :ERROR )
+if not exist "!BIN!\liblz4.dll"        ( echo FAIL: "!BIN!\liblz4.dll"        && goto :ERROR )
+if not exist "!BIN!\liblz4.lib"        ( echo FAIL: "!BIN!\liblz4.lib"        && goto :ERROR )
+if not exist "!BIN!\liblz4_static.lib" ( echo FAIL: "!BIN!\liblz4_static.lib" && goto :ERROR )
+if not exist "!BIN!\lz4.exe"           ( echo FAIL: "!BIN!\lz4.exe"           && goto :ERROR )
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/_setup.bat

@@ -0,0 +1,35 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+rem https://github.com/Microsoft/vswhere
+rem https://github.com/microsoft/vswhere/wiki/Find-VC#batch
+
+set "vswhere=%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe"
+if not exist "%vswhere%" (
+  echo Failed to find "vswhere.exe".  Please install the latest version of Visual Studio.
+  goto :ERROR
+)
+
+set "InstallDir="
+for /f "usebackq tokens=*" %%i in (
+  `"%vswhere%" -latest                                                     ^
+               -products *                                                 ^
+               -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 ^
+               -property installationPath`
+) do (
+  set "InstallDir=%%i"
+)
+if "%InstallDir%" == "" (
+  echo Failed to find Visual C++.  Please install the latest version of Visual C++.
+  goto :ERROR
+)
+
+call "%InstallDir%\VC\Auxiliary\Build\vcvars64.bat" || goto :ERROR
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/_test.bat

@@ -0,0 +1,38 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+@rem set "Configuration=Debug"
+@rem set "Platform=Win32"
+
+set "BIN=.\bin\!Platform!_!Configuration!"
+set "TEST_FILES=..\..\tests\COPYING"
+
+echo !BIN!\lz4 -h
+     !BIN!\lz4 -h	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b
+     !BIN!\lz4 -i1b	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b5
+     !BIN!\lz4 -i1b5	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b10
+     !BIN!\lz4 -i1b10	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b15
+     !BIN!\lz4 -i1b15	|| goto :ERROR
+     
+echo fullbench
+!BIN!\fullbench.exe --no-prompt -i1 %TEST_FILES%	|| goto :ERROR
+
+echo fuzzer
+!BIN!\fuzzer.exe -v -T30s				|| goto :ERROR
+
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/build-and-test-win32-debug.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Debug"
+set "Platform=Win32"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/build-and-test-win32-release.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Release"
+set "Platform=Win32"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/build-and-test-x64-debug.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Debug"
+set "Platform=x64"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

lz4.mod/lz4/build/VS2022/build-and-test-x64-release.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Release"
+set "Platform=x64"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

lz4.mod/lz4/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>

lz4.mod/lz4/build/VS2022/lz4.sln

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.28307.271
+# Visual Studio Version 17
+VisualStudioVersion = 17.6.33712.159
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "liblz4-dll", "liblz4-dll\liblz4-dll.vcxproj", "{9800039D-4AAA-43A4-BB78-FEF6F4836927}"
 EndProject
@@ -20,6 +20,9 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fullbench-dll", "fullbench-
 	EndProjectSection
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lz4", "lz4\lz4.vcxproj", "{60A3115E-B988-41EE-8815-F4D4F253D866}"
+	ProjectSection(ProjectDependencies) = postProject
+		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476} = {9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}
+	EndProjectSection
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

lz4.mod/lz4/build/VS2017/lz4/lz4.vcxproj → lz4.mod/lz4/build/VS2022/lz4/lz4.vcxproj

@@ -22,32 +22,32 @@
     <VCProjectVersion>15.0</VCProjectVersion>
     <ProjectGuid>{60A3115E-B988-41EE-8815-F4D4F253D866}</ProjectGuid>
     <RootNamespace>lz4</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>false</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
@@ -105,6 +105,8 @@
       <SubSystem>Console</SubSystem>
       <OptimizeReferences>false</OptimizeReferences>
       <EnableCOMDATFolding>false</EnableCOMDATFolding>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -114,6 +116,10 @@
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
     </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
@@ -130,6 +136,8 @@
       <OptimizeReferences>true</OptimizeReferences>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Console</SubSystem>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -144,6 +152,8 @@
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -152,9 +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" />
@@ -163,8 +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" />

lz4.mod/lz4/build/cmake/CMakeLists.txt

@@ -6,48 +6,43 @@
 # 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 2.8.12)
+
+cmake_minimum_required(VERSION 3.5)
 
 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}")
+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)
 
-if("${CMAKE_VERSION}" VERSION_LESS "3.0")
-  project(LZ4 C)
-else()
-  cmake_policy (SET CMP0048 NEW)
-  project(LZ4
-    VERSION ${LZ4_VERSION_STRING}
-    LANGUAGES C)
-endif()
+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)
-
-# 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()
+
+
+# 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)
@@ -80,19 +75,11 @@ 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.
 
 # Whether to use position independent code for the static library.  If
 # we're building a shared library this is ignored and PIC is always
@@ -100,6 +87,7 @@ set(LZ4_CLI_SOURCES
 option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ON)
 
 # liblz4
+include(GNUInstallDirs)
 set(LZ4_LIBRARIES_BUILT)
 if(BUILD_SHARED_LIBS)
   add_library(lz4_shared SHARED ${LZ4_SOURCES})
@@ -130,11 +118,23 @@ if(BUILD_STATIC_LIBS)
     POSITION_INDEPENDENT_CODE ${LZ4_POSITION_INDEPENDENT_LIB})
   list(APPEND LZ4_LIBRARIES_BUILT lz4_static)
 endif()
+# Add unified target.
+add_library(lz4 INTERFACE)
+list(APPEND LZ4_LIBRARIES_BUILT lz4)
+if(BUILD_SHARED_LIBS)
+  target_link_libraries(lz4 INTERFACE lz4_shared)
+else()
+  target_link_libraries(lz4 INTERFACE lz4_static)
+endif()
 
+# xxhash namespace
+if(BUILD_SHARED_LIBS)
+  target_compile_definitions(lz4_shared PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif()
 if(BUILD_STATIC_LIBS)
-  set(LZ4_LINK_LIBRARY lz4_static)
-else()
-  list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES})
+  target_compile_definitions(lz4_static PRIVATE
+    XXH_NAMESPACE=LZ4_)
 endif()
 
 # lz4
@@ -142,55 +142,44 @@ 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()
-
-# 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()
 
 # 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
-
-    # 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}")
-
-  check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name})
-
-  if(${test_name})
-    set(CMAKE_C_FLAGS "${flag} ${CMAKE_C_FLAGS}")
-  endif()
+if(MSVC)
+  set(CMAKE_C_FLAGS_DEBUG "${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)
+
+    # 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}" ${test_name})
+
+    if(${test_name})
+      set(CMAKE_C_FLAGS_DEBUG "${flag} ${CMAKE_C_FLAGS_DEBUG}")
+    endif()
+
+    unset(test_name)
+    unset(flag_to_test)
+  endforeach (flag)
+endif()
 
-  unset(test_name)
-  unset(flag_to_test)
-endforeach (flag)
 
 if(NOT LZ4_BUNDLED_MODE)
-  include(GNUInstallDirs)
-
   install(TARGETS ${LZ4_PROGRAMS_BUILT}
     BUNDLE	DESTINATION "${CMAKE_INSTALL_BINDIR}"
     RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
@@ -201,8 +190,9 @@ if(NOT LZ4_BUNDLED_MODE)
     RUNTIME DESTINATION "${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")
@@ -233,16 +223,21 @@ if(NOT LZ4_BUNDLED_MODE)
       ${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake
     DESTINATION ${LZ4_PKG_INSTALLDIR})
 
-  # install lz4cat and unlz4 symlinks on *nix
+  # 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}
+        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)

lz4.mod/lz4/contrib/meson/meson/GetLz4LibraryVersion.py → lz4.mod/lz4/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)

lz4.mod/lz4/contrib/meson/meson.build → lz4.mod/lz4/build/meson/meson.build

@@ -13,15 +13,19 @@
 
 project(
   'lz4',
-  ['c'],
+  'c',
   license: 'BSD-2-Clause-Patent AND GPL-2.0-or-later',
   default_options: [
     'c_std=c99',
     'buildtype=release',
     'warning_level=3'
   ],
-  version: 'DUMMY',
-  meson_version: '>=0.49.0'
+  version: run_command(
+    find_program('GetLz4LibraryVersion.py'),
+    '../../lib/lz4.h',
+    check: true
+  ).stdout().strip(),
+  meson_version: '>=0.58.0'
 )
 
 subdir('meson')

lz4.mod/lz4/contrib/meson/meson/contrib/gen_manual/meson.build → lz4.mod/lz4/build/meson/meson/contrib/gen_manual/meson.build

@@ -10,7 +10,7 @@
 
 lz4_source_root = '../../../../..'
 
-add_languages('cpp')
+add_languages('cpp', native: true)
 
 sources = files(
   lz4_source_root / 'contrib/gen_manual/gen_manual.cpp'
@@ -33,7 +33,7 @@ foreach mp : manual_pages
     output: '@0@_manual.html'.format(mp),
     command: [
       gen_manual,
-      lz4_version,
+      meson.project_version(),
       '@INPUT@',
       '@OUTPUT@',
     ],

lz4.mod/lz4/contrib/meson/meson/examples/meson.build → lz4.mod/lz4/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

lz4.mod/lz4/contrib/meson/meson/lib/meson.build → lz4.mod/lz4/build/meson/meson/lib/meson.build

@@ -17,41 +17,49 @@ sources = files(
   lz4_source_root / 'lib/xxhash.c'
 )
 
+if get_option('unstable')
+  sources += files(lz4_source_root / 'lib/lz4file.c')
+endif
+
 c_args = []
 
 if host_machine.system() == 'windows' and get_option('default_library') != 'static'
   c_args += '-DLZ4_DLL_EXPORT=1'
 endif
 
-if get_option('unstable')
-  compile_args += '-DLZ4_STATIC_LINKING_ONLY'
-  if get_option('default_library') != 'static'
-    c_args += '-DLZ4_PUBLISH_STATIC_FUNCTIONS'
-  endif
-endif
-
 liblz4 = library(
   'lz4',
   sources,
+  c_args: c_args,
   install: true,
-  version: lz4_version,
+  version: meson.project_version(),
   gnu_symbol_visibility: 'hidden'
 )
 
 liblz4_dep = declare_dependency(
   link_with: liblz4,
+  compile_args: compile_args,
   include_directories: include_directories(lz4_source_root / 'lib')
 )
 
-if get_option('tests') or get_option('programs') or get_option('examples')
-  liblz4_internal = static_library(
-    'lz4-internal',
-    objects: liblz4.extract_all_objects(recursive: true),
-    gnu_symbol_visibility: 'hidden'
-  )
+meson.override_dependency('liblz4', liblz4_dep)
+
+if get_option('tests') or get_option('programs') or get_option('examples') or get_option('ossfuzz')
+  if get_option('default_library') == 'shared'
+    liblz4_internal = static_library(
+      'lz4-internal',
+      objects: liblz4.extract_all_objects(recursive: true),
+      gnu_symbol_visibility: 'hidden'
+    )
+  elif get_option('default_library') == 'static'
+    liblz4_internal = liblz4
+  elif get_option('default_library') == 'both'
+    liblz4_internal = liblz4.get_static_lib()
+  endif
 
   liblz4_internal_dep = declare_dependency(
     link_with: liblz4_internal,
+    compile_args: compile_args,
     include_directories: include_directories(lz4_source_root / 'lib')
   )
 endif
@@ -61,7 +69,7 @@ pkgconfig.generate(
   name: 'lz4',
   filebase: 'liblz4',
   description: 'extremely fast lossless compression algorithm library',
-  version: lz4_version,
+  version: meson.project_version(),
   url: 'http://www.lz4.org/'
 )
 
@@ -73,4 +81,7 @@ install_headers(
 
 if get_option('default_library') != 'shared'
   install_headers(lz4_source_root / 'lib/lz4frame_static.h')
+  if get_option('unstable')
+    install_headers(lz4_source_root / 'lib/lz4file.h')
+  endif
 endif

lz4.mod/lz4/build/meson/meson/meson.build

@@ -0,0 +1,135 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+
+cc = meson.get_compiler('c')
+
+fs = import('fs')
+pkgconfig = import('pkgconfig')
+
+lz4_source_root = '../../..'
+
+add_project_arguments('-DXXH_NAMESPACE=LZ4_', language: 'c')
+
+if get_option('debug')
+  add_project_arguments(cc.get_supported_arguments(
+      '-Wcast-qual',
+      '-Wcast-align',
+      '-Wshadow',
+      '-Wswitch-enum',
+      '-Wdeclaration-after-statement',
+      '-Wstrict-prototypes',
+      '-Wundef',
+      '-Wpointer-arith',
+      '-Wstrict-aliasing=1',
+      '-DLZ4_DEBUG=@0@'.format(get_option('debug-level'))
+    ),
+    language: 'c'
+  )
+endif
+
+compile_args = []
+
+if not get_option('align-test')
+  add_project_arguments('-DLZ4_ALIGN_TEST=0', language: 'c')
+endif
+
+if get_option('disable-memory-allocation')
+  if get_option('default_library') != 'static'
+    error('Memory allocation can only be disabled in static builds')
+  endif
+
+  add_project_arguments('-DLZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION')
+  compile_args += '-DLZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION'
+endif
+
+add_project_arguments(
+  '-DLZ4_DISTANCE_MAX=@0@'.format(get_option('distance-max')),
+  language: 'c'
+)
+compile_args += '-DLZ4_DISTANCE_MAX=@0@'.format(get_option('distance-max'))
+
+if not get_option('fast-dec-loop').auto()
+  add_project_arguments(
+    '-DLZ4_FAST_DEC_LOOP=@0@'.format(
+      get_option('fast-dec-loop').enabled() ? 1 : 0
+    ),
+    language: 'c'
+  )
+endif
+
+if get_option('force-sw-bitcount')
+  add_project_arguments('-DLZ4_FORCE_SW_BITCOUNT', language: 'c')
+endif
+
+if get_option('freestanding')
+  add_project_arguments('-DLZ4_FREESTANDING=1', language: 'c')
+  compile_args += '-DLZ4_FREESTANDING=1'
+endif
+
+if get_option('memory-usage') > 0
+  add_project_arguments(
+    '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage')),
+    language: 'c'
+  )
+  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'
+  if get_option('default_library') != 'static'
+    add_project_arguments('-DLZ4_PUBLISH_STATIC_FUNCTIONS', language: 'c')
+    compile_args += '-DLZ4_PUBLISH_STATIC_FUNCTIONS'
+
+    add_project_arguments('-DLZ4F_PUBLISH_STATIC_FUNCTIONS', language: 'c')
+    compile_args += '-DLZ4F_PUBLISH_STATIC_FUNCTIONS'
+  endif
+endif
+
+if get_option('user-memory-functions')
+  add_project_arguments('-DLZ4_USER_MEMORY_FUNCTIONS', language: 'c')
+endif
+
+run_env = environment()
+
+subdir('lib')
+
+if get_option('programs')
+  subdir('programs')
+else
+  lz4 = disabler()
+  lz4cat = disabler()
+  unlz4 = disabler()
+endif
+
+if get_option('tests')
+  subdir('tests')
+endif
+
+if get_option('contrib')
+  subdir('contrib')
+endif
+
+if get_option('examples')
+  subdir('examples')
+endif
+
+if get_option('ossfuzz')
+  subdir('ossfuzz')
+endif

lz4.mod/lz4/build/meson/meson/ossfuzz/meson.build

@@ -0,0 +1,35 @@
+fuzzers = [
+  'compress_frame_fuzzer',
+  'compress_fuzzer',
+  'compress_hc_fuzzer',
+  'decompress_frame_fuzzer',
+  'decompress_fuzzer',
+  'round_trip_frame_uncompressed_fuzzer',
+  'round_trip_fuzzer',
+  'round_trip_hc_fuzzer',
+  'round_trip_stream_fuzzer'
+]
+
+c_args = cc.get_supported_arguments(
+  '-Wno-unused-function',
+  '-Wno-sign-compare',
+  '-Wno-declaration-after-statement'
+)
+
+foreach f : fuzzers
+  lib = static_library(
+    f,
+    lz4_source_root / 'ossfuzz/@[email protected]'.format(f),
+    lz4_source_root / 'ossfuzz/lz4_helpers.c',
+    lz4_source_root / 'ossfuzz/fuzz_data_producer.c',
+    c_args: c_args,
+    dependencies: [liblz4_internal_dep]
+  )
+
+  executable(
+    f,
+    lz4_source_root / 'ossfuzz/standaloneengine.c',
+    link_with: lib,
+    dependencies: [liblz4_internal_dep]
+  )
+endforeach

lz4.mod/lz4/contrib/meson/meson/programs/meson.build → lz4.mod/lz4/build/meson/meson/programs/meson.build

@@ -10,22 +10,69 @@
 
 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
 )
 
+lz4cat = custom_target(
+  'lz4cat',
+  input: lz4,
+  output: 'lz4cat',
+  command: [
+    'ln',
+    '--symbolic',
+    '--force',
+    fs.name(lz4.full_path()),
+    '@OUTPUT@'
+  ]
+)
+
+unlz4 = custom_target(
+  'unlz4',
+  input: lz4,
+  output: 'unlz4',
+  command: [
+    'ln',
+    '--symbolic',
+    '--force',
+    fs.name(lz4.full_path()),
+    '@OUTPUT@'
+  ]
+)
+
+meson.override_find_program('lz4', lz4)
+
+run_env.prepend('PATH', meson.current_build_dir())
+
 install_man(lz4_source_root / 'programs/lz4.1')
 
 if meson.version().version_compare('>=0.61.0')

lz4.mod/lz4/build/meson/meson/tests/meson.build

@@ -0,0 +1,162 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+
+lz4_source_root = '../../../..'
+
+fuzzer_time = 90
+test_exes = {
+  'abiTest': {
+    'sources': files(lz4_source_root / 'tests/abiTest.c'),
+    'test': false,
+  },
+  'checkFrame': {
+    'sources': files(lz4_source_root / 'tests/checkFrame.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+  },
+  'checkTag': {
+    'sources': files(lz4_source_root / 'tests/checkTag.c'),
+    'test': false,
+  },
+  'datagen': {
+    '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': {
+    'sources': files(lz4_source_root / 'tests/decompress-partial-usingDict.c'),
+  },
+  'decompress-partial.c': {
+    'sources': files(lz4_source_root / 'tests/decompress-partial.c'),
+  },
+  'frametest': {
+    'sources': files(lz4_source_root / 'tests/frametest.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'],
+    'link_args': ['-nostdlib'],
+    'build': cc.get_id() in ['gcc', 'clang'] and
+      host_machine.system() == 'linux' and host_machine.cpu_family() == 'x86_64',
+    'override_options': ['optimization=1'],
+  },
+  'fullbench': {
+    'sources': files(lz4_source_root / 'tests/fullbench.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['--no-prompt', '-i1', files(lz4_source_root / 'tests/COPYING')],
+    'test': false,
+  },
+  'fuzzer': {
+    'sources': files(lz4_source_root / 'tests/fuzzer.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['-T@0@s'.format(fuzzer_time)],
+    'test': false,
+  },
+  'roundTripTest': {
+    'sources': files(lz4_source_root / 'tests/roundTripTest.c'),
+    'test': false,
+  },
+}
+
+targets = {}
+
+foreach e, attrs : test_exes
+  if not attrs.get('build', true)
+    targets += {e: disabler()}
+    continue
+  endif
+
+  t = executable(
+    e,
+    attrs.get('sources'),
+    c_args: attrs.get('c_args', []),
+    link_args: attrs.get('link_args', []),
+    objects: attrs.get('objects', []),
+    dependencies: [liblz4_internal_dep],
+    include_directories: attrs.get('include_directories', []),
+    install: false,
+    override_options: attrs.get('override_options', [])
+  )
+
+  targets += {e: t}
+
+  if not attrs.get('test', true)
+    continue
+  endif
+
+  test(
+    e,
+    t,
+    args: attrs.get('params', []),
+    timeout: 120
+  )
+endforeach
+
+fs = import('fs')
+
+run_env.prepend('PATH', meson.current_build_dir())
+
+test_scripts = {
+  'lz4-basic': {
+    'depends': [lz4, lz4cat, unlz4, targets['datagen']],
+  },
+  'lz4-dict': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-contentSize': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-fast-hugefile': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-frame-concatenation': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-multiple': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-multiple-legacy': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-opt-parser': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-skippable': {
+    'depends': [lz4],
+  },
+  'lz4-sparse': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-testmode': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4hc-hugefile': {
+    'depends': [lz4, targets['datagen']],
+  },
+}
+
+foreach s, attrs : test_scripts
+  script = find_program(lz4_source_root / 'tests/test-@[email protected]'.format(s))
+
+  test(
+    '@0@'.format(s),
+    script,
+    depends: attrs.get('depends', []),
+    workdir: fs.parent(script.full_path()),
+    env: run_env,
+    timeout: 360
+  )
+endforeach

lz4.mod/lz4/build/meson/meson_options.txt

@@ -0,0 +1,44 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# 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,
+  description: 'Enable contrib')
+option('debug-level', type: 'integer', min: 0, max: 7, value: 1,
+  description: 'Enable run-time debug. See lib/lz4hc.c')
+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',
+  description: 'See LZ4_FAST_DEC_LOOP')
+option('force-sw-bitcount', type: 'boolean', value: false,
+  description: 'See LZ4_FORCE_SW_BITCOUNT')
+option('freestanding', type: 'boolean', value: false,
+  description: 'See LZ4_FREESTANDING')
+option('memory-usage', type: 'integer', min: 0, max: 20, value: 0,
+  description: 'See LZ4_MEMORY_USAGE. 0 means use the LZ4 default')
+option('ossfuzz', type: 'boolean', value: true,
+  description: 'Enable ossfuzz')
+option('programs', type: 'boolean', value: false,
+  description: 'Enable programs')
+option('tests', type: 'boolean', value: false,
+  description: 'Enable tests')
+option('unstable', type: 'boolean', value: false,
+  description: 'Expose unstable interfaces')
+option('user-memory-functions', type: 'boolean', value: false,
+  description: 'See LZ4_USER_MEMORY_FUNCTIONS')

lz4.mod/lz4/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`.

lz4.mod/lz4/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

lz4.mod/lz4/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"

lz4.mod/lz4/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"

lz4.mod/lz4/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"

lz4.mod/lz4/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"

lz4.mod/lz4/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)

lz4.mod/lz4/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))
 

lz4.mod/lz4/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

lz4.mod/lz4/contrib/meson/meson/meson.build

@@ -1,67 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-cc = meson.get_compiler('c')
-
-pkgconfig = import('pkgconfig')
-
-lz4_source_root = '../../..'
-
-lz4_version = meson.project_version()
-
-lz4_h_file = lz4_source_root / 'lib/lz4.h'
-GetLz4LibraryVersion_py = find_program('GetLz4LibraryVersion.py')
-lz4_version = run_command(GetLz4LibraryVersion_py, lz4_h_file, check: true).stdout().strip()
-message('Project version is now: @0@'.format(lz4_version))
-
-add_project_arguments('-DXXH_NAMESPACE=LZ4_', language: 'c')
-
-if get_option('debug')
-  add_project_arguments(cc.get_supported_arguments([
-        '-Wcast-qual',
-        '-Wcast-align',
-        '-Wshadow',
-        '-Wswitch-enum',
-        '-Wdeclaration-after-statement',
-        '-Wstrict-prototypes',
-        '-Wundef',
-        '-Wpointer-arith',
-        '-Wstrict-aliasing=1',
-        '-DLZ4_DEBUG=@0@'.format(get_option('debug-level')),
-      ]
-    ),
-    language: 'c',
-  )
-endif
-
-if get_option('memory-usage') > 0
-  add_project_arguments(
-    '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage')),
-    language: 'c'
-  )
-endif
-
-subdir('lib')
-
-if get_option('programs')
-  subdir('programs')
-endif
-
-if get_option('tests')
-  subdir('tests')
-endif
-
-if get_option('contrib')
-  subdir('contrib')
-endif
-
-if get_option('examples')
-  subdir('examples')
-endif

lz4.mod/lz4/contrib/meson/meson/tests/meson.build

@@ -1,52 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-lz4_source_root = '../../../..'
-
-exes = {
-  'fullbench': {
-    'sources': files(lz4_source_root / 'tests/fullbench.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'fuzzer': {
-    'sources': files(lz4_source_root / 'tests/fuzzer.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'frametest': {
-    'sources': files(lz4_source_root / 'tests/frametest.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'roundTripTest': {
-    'sources': files(lz4_source_root / 'tests/roundTripTest.c'),
-  },
-  'datagen': {
-    'sources': files(lz4_source_root / 'tests/datagencli.c'),
-    'objects': lz4.extract_objects(lz4_source_root / 'programs/datagen.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'checkFrame': {
-    'sources': files(lz4_source_root / 'tests/checkFrame.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'checkTag': {
-    'sources': files(lz4_source_root / 'tests/checkTag.c'),
-  },
-}
-
-foreach e, attrs : exes
-  executable(
-    e,
-    attrs.get('sources'),
-    objects: attrs.get('objects', []),
-    dependencies: [liblz4_internal_dep],
-    include_directories: attrs.get('include_directories', []),
-    install: false
-  )
-endforeach

lz4.mod/lz4/contrib/meson/meson_options.txt

@@ -1,24 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-option('debug-level', type: 'integer', min: 0, max: 7, value: 1,
-  description: 'Enable run-time debug. See lib/lz4hc.c')
-option('unstable', type: 'boolean', value: false,
-  description: 'Expose unstable interfaces')
-option('programs', type: 'boolean', value: false,
-  description: 'Enable programs build')
-option('tests', type: 'boolean', value: false,
-  description: 'Enable tests build')
-option('contrib', type: 'boolean', value: false,
-  description: 'Enable contrib build')
-option('examples', type: 'boolean', value: false,
-  description: 'Enable examples build')
-option('memory-usage', type: 'integer', min: 0, value: 0,
-  description: 'See LZ4_MEMORY_USAGE. 0 means use the LZ4 default')

lz4.mod/lz4/contrib/snap/snapcraft.yaml

@@ -1,5 +1,5 @@
 name: lz4
-version: 1.9.3 
+version: 1.9.4 
 summary: Extremely Fast Compression algorithm 
 description: >
     LZ4 is lossless compression algorithm, providing compression
@@ -20,6 +20,7 @@ description: >
     LZ4 library is provided as open-source software using BSD 2-Clause license.
 confinement: strict
 grade: stable
+base: core20
 
 apps:
   lz4:

lz4.mod/lz4/doc/lz4_Frame_format.md

@@ -16,7 +16,7 @@ Distribution of this document is unlimited.
 
 ### Version
 
-1.6.2 (12/08/2020)
+1.6.4 (28/12/2023)
 
 
 Introduction
@@ -61,9 +61,9 @@ and associated error message explaining which parameter is unsupported.
 General Structure of LZ4 Frame format
 -------------------------------------
 
-| MagicNb | F. Descriptor | Block | (...) | EndMark | C. Checksum |
-|:-------:|:-------------:| ----- | ----- | ------- | ----------- |
-| 4 bytes |  3-15 bytes   |       |       | 4 bytes | 0-4 bytes   |
+| MagicNb | F. Descriptor | Data Block | (...) | EndMark | C. Checksum |
+|:-------:|:-------------:| ---------- | ----- | ------- | ----------- |
+| 4 bytes |  3-15 bytes   |            |       | 4 bytes | 0-4 bytes   |
 
 __Magic Number__
 
@@ -219,24 +219,26 @@ It can be skipped by a decoder, or used to validate content correctness.
 
 __Dictionary ID__
 
-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.
-
-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.
+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.
 
-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.
+every block is 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.
+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.
+Within a single frame, only a single Dict-ID field can be defined.
+
+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__
 
@@ -269,7 +271,7 @@ The size does not include the block checksum if present.
 
 _Block_Size_ shall never be larger than _Block_Maximum_Size_.
 Such an outcome could potentially happen for non-compressible sources.
-In such a case, such data block must be passed using uncompressed format.
+In such a case, such data block **must** be passed using uncompressed format.
 
 A value of `0x00000000` is invalid, and signifies an _EndMark_ instead.
 Note that this is different from a value of `0x80000000` (highest bit set),
@@ -397,6 +399,10 @@ 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_
 
 1.6.1 : introduced terms "LZ4 Frame Header" and "LZ4 Frame Footer"
@@ -427,6 +433,6 @@ 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

lz4.mod/lz4/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.
@@ -159,19 +161,20 @@ 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+):
+ 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.
@@ -222,6 +225,24 @@ 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 +273,55 @@ 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 +362,12 @@ 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 +400,23 @@ 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 +442,27 @@ 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 +493,9 @@ 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 +565,7 @@ 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 +637,12 @@ 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.

lz4.mod/lz4/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.
@@ -353,84 +377,113 @@ 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>size_t
+LZ4F_decompress_usingDict(LZ4F_dctx* dctxPtr,
+                          void* dstBuffer, size_t* dstSizePtr,
+                    const void* srcBuffer, size_t* srcSizePtr,
+                    const void* dict, size_t dictSize,
+                    const LZ4F_decompressOptions_t* decompressOptionsPtr);
+</b><p>  Same as LZ4F_decompress(), using a predefined dictionary.
+  Dictionary is used "in place", without any preprocessing.
+  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>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.
+<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 
+ @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
+<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).
+ @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.
+  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()) 
+           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>LZ4FLIB_STATIC_API size_t
+<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 : you may provide NULL as argument,
-  however, it's the only way to provide dictID in the frame header.
+ @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()) 
+           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_decompress_usingDict(LZ4F_dctx* dctxPtr,
-                          void* dstBuffer, size_t* dstSizePtr,
-                    const void* srcBuffer, size_t* srcSizePtr,
-                    const void* dict, size_t dictSize,
-                    const LZ4F_decompressOptions_t* decompressOptionsPtr);
-</b><p>  Same as LZ4F_decompress(), using a predefined dictionary.
-  Dictionary is used "in place", without any preprocessing.
-  It must remain accessible throughout the entire frame decoding. 
+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);

lz4.mod/lz4/examples/.gitignore

@@ -1,11 +1,12 @@
 /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

lz4.mod/lz4/examples/COPYING

@@ -1,339 +1,83 @@
-                    GNU GENERAL PUBLIC LICENSE
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+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.
+
+Preamble
+
+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.
+
+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.
+
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+
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+
+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.
+
+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.
+
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+
+The precise terms and conditions for copying, distribution and modification follow.
+
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+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.
+
+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.
+
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+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.
+
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+
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+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.

lz4.mod/lz4/examples/Makefile

@@ -27,71 +27,57 @@
 # 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
+SLIBLZ4   := $(LIBDIR)/liblz4.a
+LZ4DIR     = ../programs
+LZ4        = $(LZ4DIR)/lz4
 
 default: all
 
-all: printVersion doubleBuffer dictionaryRandomAccess ringBuffer ringBufferHC \
-     lineCompress frameCompress fileCompress simpleBuffer
+$(SLIBLZ4): $(LIBDIR)/lz4.c $(LIBDIR)/lz4hc.c $(LIBDIR)/lz4frame.c $(LIBDIR)/lz4.h $(LIBDIR)/lz4hc.h $(LIBDIR)/lz4frame.h $(LIBDIR)/lz4frame_static.h
+	$(MAKE) -j -C $(LIBDIR) liblz4.a
 
-$(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
+ALL = print_version \
+	  simple_buffer \
+	  frameCompress \
+	  fileCompress \
+      blockStreaming_doubleBuffer \
+	  blockStreaming_ringBuffer \
+	  streamingHC_ringBuffer \
+      blockStreaming_lineByLine \
+	  dictionaryRandomAccess \
+	  bench_functions
 
-printVersion: printVersion.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+.PHONY: all
+all: $(ALL)
 
-doubleBuffer: blockStreaming_doubleBuffer.c $(LZ4DIR)/liblz4.a
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
-
-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) :
-	$(MAKE) -C ../programs lz4
+	$(MAKE) -j -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
 	@echo "\n=== Frame compression ==="
@@ -100,15 +86,10 @@ test : all $(LZ4)
 	@echo "\n=== file compression ==="
 	./fileCompress$(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

lz4.mod/lz4/examples/fileCompress.c

@@ -1,7 +1,7 @@
 /* LZ4file API example : compress a file
  * Modified from an example code by anjiahao
  *
- * This example will demonstrate how 
+ * This example will demonstrate how
  * to manipulate lz4 compressed files like
  * normal files */
 
@@ -41,6 +41,7 @@ static int compress_file(FILE* f_in, FILE* f_out)
     void* const buf = malloc(CHUNK_SIZE);
     if (!buf) {
         printf("error: memory allocation failed \n");
+        return 1;
     }
 
     /* Of course, you can also use prefsPtr to

lz4.mod/lz4/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))
@@ -47,13 +47,12 @@ 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 \
              -Wundef -Wpointer-arith -Wstrict-aliasing=1
-CFLAGS  += $(DEBUGFLAGS)
-FLAGS    = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
+CFLAGS   = $(DEBUGFLAGS) $(USERCFLAGS)
+ALLFLAGS = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 
 SRCFILES := $(sort $(wildcard *.c))
 
@@ -65,12 +64,17 @@ ifeq ($(TARGET_OS), Darwin)
 	SHARED_EXT = dylib
 	SHARED_EXT_MAJOR = $(LIBVER_MAJOR).$(SHARED_EXT)
 	SHARED_EXT_VER = $(LIBVER).$(SHARED_EXT)
-	SONAME_FLAGS = -install_name $(libdir)/liblz4.$(SHARED_EXT_MAJOR) -compatibility_version $(LIBVER_MAJOR) -current_version $(LIBVER)
+	SONAME_FLAGS = -install_name $(libdir)/liblz4.$(SHARED_EXT_MAJOR) -compatibility_version $(LIBVER_MAJOR) -current_version $(LIBVER) -dynamiclib
 else
-	SONAME_FLAGS = -Wl,-soname=liblz4.$(SHARED_EXT).$(LIBVER_MAJOR)
-	SHARED_EXT = so
-	SHARED_EXT_MAJOR = $(SHARED_EXT).$(LIBVER_MAJOR)
-	SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
+	ifeq ($(WINBASED),yes)
+		SHARED_EXT = dll
+		SHARED_EXT_VER = $(SHARED_EXT)
+	else  # posix non-mac
+		SONAME_FLAGS = -Wl,-soname=liblz4.$(SHARED_EXT).$(LIBVER_MAJOR)
+		SHARED_EXT = so
+		SHARED_EXT_MAJOR = $(SHARED_EXT).$(LIBVER_MAJOR)
+		SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
+	endif
 endif
 
 .PHONY: default
@@ -79,19 +83,21 @@ 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
 
+CLEAN += liblz4.a
 liblz4.a: $(SRCFILES)
 ifeq ($(BUILD_STATIC),yes)  # can be disabled on command line
 	@echo compiling static library
@@ -100,9 +106,11 @@ ifeq ($(BUILD_STATIC),yes)  # can be disabled on command line
 endif
 
 ifeq ($(WINBASED),yes)
+
+CLEAN += $(liblz4-dll.rc)
 liblz4-dll.rc: liblz4-dll.rc.in
 	@echo creating library resource
-	$(SED) -e 's|@LIBLZ4@|$(LIBLZ4)|' \
+	$(SED) -e 's|@LIBLZ4@|$(LIBLZ4_NAME)|' \
          -e 's|@LIBVER_MAJOR@|$(LIBVER_MAJOR)|g' \
          -e 's|@LIBVER_MINOR@|$(LIBVER_MINOR)|g' \
          -e 's|@LIBVER_PATCH@|$(LIBVER_PATCH)|g' \
@@ -111,31 +119,47 @@ liblz4-dll.rc: liblz4-dll.rc.in
 liblz4-dll.o: liblz4-dll.rc
 	$(WINDRES) -i liblz4-dll.rc -o liblz4-dll.o
 
+CLEAN += $(LIBLZ4_EXP)
 $(LIBLZ4): $(SRCFILES) liblz4-dll.o
+  ifeq ($(BUILD_SHARED),yes)
 	@echo compiling dynamic library $(LIBVER)
-	$(CC) $(FLAGS) -DLZ4_DLL_EXPORT=1 -shared $^ -o dll/[email protected] -Wl,--out-implib,dll/$(LIBLZ4_EXP)
+	$(CC) $(ALLFLAGS) -DLZ4_DLL_EXPORT=1 -shared $^ -o $@ -Wl,--out-implib,$(LIBLZ4_EXP)
+  endif
 
 else   # not windows
 
 $(LIBLZ4): $(SRCFILES)
+  ifeq ($(BUILD_SHARED),yes)
 	@echo compiling dynamic library $(LIBVER)
-	$(CC) $(FLAGS) -shared $^ -fPIC -fvisibility=hidden $(SONAME_FLAGS) -o $@
+	$(CC) $(ALLFLAGS) -shared $^ -fPIC -fvisibility=hidden $(SONAME_FLAGS) -o $@
 	@echo creating versioned links
 	$(LN_SF) $@ liblz4.$(SHARED_EXT_MAJOR)
 	$(LN_SF) $@ liblz4.$(SHARED_EXT)
+  endif
 
 endif
+CLEAN += $(LIBLZ4)
 
 .PHONY: liblz4
 liblz4: $(LIBLZ4)
 
+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
-	$(RM) core *.o liblz4.pc dll/$(LIBLZ4).dll dll/$(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)
 	@echo Cleaning library completed
 
 #-----------------------------------------------------------------------------
@@ -169,30 +193,23 @@ 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)
 	$(INSTALL_DATA) liblz4.a $(DESTDIR)$(libdir)/liblz4.a
 	$(INSTALL_DATA) lz4frame_static.h $(DESTDIR)$(includedir)/lz4frame_static.h
+	$(INSTALL_DATA) lz4file.h $(DESTDIR)$(includedir)/lz4file.h
   endif
   ifeq ($(BUILD_SHARED),yes)
 # Traditionally, one installs the DLLs in the bin directory as programs
 # search them first in their directory. This allows to not pollute system
 # directories (like c:/windows/system32), nor modify the PATH variable.
     ifeq ($(WINBASED),yes)
-	$(INSTALL_PROGRAM) dll/$(LIBLZ4).dll $(DESTDIR)$(bindir)
-	$(INSTALL_PROGRAM) dll/$(LIBLZ4_EXP) $(DESTDIR)$(libdir)
+	$(INSTALL_PROGRAM) $(LIBLZ4) $(DESTDIR)$(bindir)
+	$(INSTALL_PROGRAM) $(LIBLZ4_EXP) $(DESTDIR)$(libdir)
     else
 	$(INSTALL_PROGRAM) liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(libdir)
 	$(LN_SF) liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(libdir)/liblz4.$(SHARED_EXT_MAJOR)
@@ -205,10 +222,11 @@ 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,1)
-	$(RM) $(DESTDIR)$(bindir)/$(LIBLZ4).dll
+  ifeq (WINBASED,yes)
+	$(RM) $(DESTDIR)$(bindir)/$(LIBLZ4)
 	$(RM) $(DESTDIR)$(libdir)/$(LIBLZ4_EXP)
   else
 	$(RM) $(DESTDIR)$(libdir)/liblz4.$(SHARED_EXT)
@@ -220,6 +238,7 @@ uninstall:
 	$(RM) $(DESTDIR)$(includedir)/lz4hc.h
 	$(RM) $(DESTDIR)$(includedir)/lz4frame.h
 	$(RM) $(DESTDIR)$(includedir)/lz4frame_static.h
+	$(RM) $(DESTDIR)$(includedir)/lz4file.h
 	@echo lz4 libraries successfully uninstalled
 
 endif

lz4.mod/lz4/lib/README.md

@@ -100,7 +100,7 @@ The following build macro can be selected to adjust source code behavior at comp
   passed as argument to become a compression state is suitably aligned.
   This test can be disabled if it proves flaky, by setting this value to 0.
 
-- `LZ4_USER_MEMORY_FUNCTIONS` : replace calls to `<stdlib,h>`'s `malloc()`, `calloc()` and `free()`
+- `LZ4_USER_MEMORY_FUNCTIONS` : replace calls to `<stdlib.h>`'s `malloc()`, `calloc()` and `free()`
   by user-defined functions, which must be named `LZ4_malloc()`, `LZ4_calloc()` and `LZ4_free()`.
   User functions must be available at link time.
 
@@ -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()`.
@@ -115,6 +121,24 @@ The following build macro can be selected to adjust source code behavior at comp
   (embedded, bootloader, etc).
   For more details, see description of this macro in `lib/lz4.h`.
 
+- `LZ4_HEAPMODE` : Select how stateless compression functions like `LZ4_compress_default()`
+  allocate memory for their hash table,
+  in memory stack (0:default, fastest), or in memory heap (1:requires malloc()).
+
+- `LZ4HC_HEAPMODE` :  Select how stateless HC compression functions like `LZ4_compress_HC()`
+  allocate memory for their workspace:
+  in stack (0), or in heap (1:default).
+  Since workspace is rather large, stack can be inconvenient, hence heap mode is recommended.
+
+- `LZ4F_HEAPMODE` : selects how `LZ4F_compressFrame()` allocates the compression state,
+  either on stack (default, value 0) or using heap memory (value 1).
+
+
+#### Makefile variables
+
+The following `Makefile` variables can be selected to alter the profile of produced binaries :
+- `BUILD_SHARED` : generate `liblz4` dynamic library (enabled by default)
+- `BUILD_STATIC` : generate `liblz4` static library (enabled by default)
 
 
 #### Amalgamation

lz4.mod/lz4/lib/lz4.c

@@ -1,6 +1,6 @@
 /*
    LZ4 - Fast LZ compression algorithm
-   Copyright (C) 2011-2020, Yann Collet.
+   Copyright (C) 2011-2023, Yann Collet.
 
    BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
 
@@ -37,7 +37,8 @@
 **************************************/
 /*
  * LZ4_HEAPMODE :
- * Select how default compression functions will allocate memory for their hash table,
+ * Select how stateless compression functions like `LZ4_compress_default()`
+ * allocate memory for their hash table,
  * in memory stack (0:default, fastest), or in memory heap (1:requires malloc()).
  */
 #ifndef LZ4_HEAPMODE
@@ -78,7 +79,7 @@
   ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) \
   || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
 #    define LZ4_FORCE_MEMORY_ACCESS 2
-#  elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || defined(__GNUC__)
+#  elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || defined(__GNUC__) || defined(_MSC_VER)
 #    define LZ4_FORCE_MEMORY_ACCESS 1
 #  endif
 #endif
@@ -105,15 +106,13 @@
 #  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 */
 
@@ -125,14 +124,17 @@
 #  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
@@ -279,7 +281,7 @@ static const int LZ4_minLength = (MFLIMIT+1);
    static int g_debuglog_enable = 1;
 #  define DEBUGLOG(l, ...) {                          \
         if ((g_debuglog_enable) && (l<=LZ4_DEBUG)) {  \
-            fprintf(stderr, __FILE__ ": ");           \
+            fprintf(stderr, __FILE__  " %i: ", __LINE__); \
             fprintf(stderr, __VA_ARGS__);             \
             fprintf(stderr, " \n");                   \
     }   }
@@ -364,6 +366,11 @@ static unsigned LZ4_isLittleEndian(void)
     return one.c[0];
 }
 
+#if defined(__GNUC__) || defined(__INTEL_COMPILER)
+#define LZ4_PACK( __Declaration__ ) __Declaration__ __attribute__((__packed__))
+#elif defined(_MSC_VER)
+#define LZ4_PACK( __Declaration__ ) __pragma( pack(push, 1) ) __Declaration__ __pragma( pack(pop))
+#endif
 
 #if defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==2)
 /* lie to the compiler about data alignment; use with caution */
@@ -379,14 +386,16 @@ static void LZ4_write32(void* memPtr, U32 value) { *(U32*)memPtr = value; }
 
 /* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
 /* currently only defined for gcc and icc */
-typedef union { U16 u16; U32 u32; reg_t uArch; } __attribute__((packed)) LZ4_unalign;
+LZ4_PACK(typedef struct { U16 u16; }) LZ4_unalign16;
+LZ4_PACK(typedef struct { U32 u32; }) LZ4_unalign32;
+LZ4_PACK(typedef struct { reg_t uArch; }) LZ4_unalignST;
 
-static U16 LZ4_read16(const void* ptr) { return ((const LZ4_unalign*)ptr)->u16; }
-static U32 LZ4_read32(const void* ptr) { return ((const LZ4_unalign*)ptr)->u32; }
-static reg_t LZ4_read_ARCH(const void* ptr) { return ((const LZ4_unalign*)ptr)->uArch; }
+static U16 LZ4_read16(const void* ptr) { return ((const LZ4_unalign16*)ptr)->u16; }
+static U32 LZ4_read32(const void* ptr) { return ((const LZ4_unalign32*)ptr)->u32; }
+static reg_t LZ4_read_ARCH(const void* ptr) { return ((const LZ4_unalignST*)ptr)->uArch; }
 
-static void LZ4_write16(void* memPtr, U16 value) { ((LZ4_unalign*)memPtr)->u16 = value; }
-static void LZ4_write32(void* memPtr, U32 value) { ((LZ4_unalign*)memPtr)->u32 = value; }
+static void LZ4_write16(void* memPtr, U16 value) { ((LZ4_unalign16*)memPtr)->u16 = value; }
+static void LZ4_write32(void* memPtr, U32 value) { ((LZ4_unalign32*)memPtr)->u32 = value; }
 
 #else  /* safe and portable access using memcpy() */
 
@@ -424,9 +433,21 @@ 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)
 {
@@ -509,7 +530,7 @@ 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)
 {
@@ -524,12 +545,12 @@ 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 <= 1933) /* MSVC 2022 ver 17.3 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 <= 1933) /* MSVC 2022 ver 17.3 or earlier */
+#if defined(_MSC_VER) && (_MSC_VER <= 1937) /* MSVC 2022 ver 17.7 or earlier */
 #  pragma warning(pop)
 #endif
         break;
@@ -776,7 +797,12 @@ 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)
@@ -803,23 +829,19 @@ LZ4_FORCE_INLINE void LZ4_putIndexOnHash(U32 idx, U32 h, void* tableBase, tableT
     }
 }
 
+/* LZ4_putPosition*() : only used in byPtr mode */
 LZ4_FORCE_INLINE void LZ4_putPositionOnHash(const BYTE* p, U32 h,
-                                  void* tableBase, tableType_t const tableType,
-                            const BYTE* srcBase)
+                                  void* tableBase, tableType_t const tableType)
 {
-    switch (tableType)
-    {
-    case clearedTable: { /* illegal! */ assert(0); return; }
-    case byPtr: { const BYTE** hashTable = (const BYTE**)tableBase; hashTable[h] = p; return; }
-    case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = (U32)(p-srcBase); return; }
-    case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = (U16)(p-srcBase); return; }
-    }
+    const BYTE** const hashTable = (const BYTE**)tableBase;
+    assert(tableType == byPtr); (void)tableType;
+    hashTable[h] = p;
 }
 
-LZ4_FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase)
+LZ4_FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType)
 {
     U32 const h = LZ4_hashPosition(p, tableType);
-    LZ4_putPositionOnHash(p, h, tableBase, tableType, srcBase);
+    LZ4_putPositionOnHash(p, h, tableBase, tableType);
 }
 
 /* LZ4_getIndexOnHash() :
@@ -844,20 +866,18 @@ LZ4_FORCE_INLINE U32 LZ4_getIndexOnHash(U32 h, const void* tableBase, tableType_
     assert(0); return 0;  /* forbidden case */
 }
 
-static const BYTE* LZ4_getPositionOnHash(U32 h, const void* tableBase, tableType_t tableType, const BYTE* srcBase)
+static const BYTE* LZ4_getPositionOnHash(U32 h, const void* tableBase, tableType_t tableType)
 {
-    if (tableType == byPtr) { const BYTE* const* hashTable = (const BYTE* const*) tableBase; return hashTable[h]; }
-    if (tableType == byU32) { const U32* const hashTable = (const U32*) tableBase; return hashTable[h] + srcBase; }
-    { const U16* const hashTable = (const U16*) tableBase; return hashTable[h] + srcBase; }   /* default, to ensure a return */
+    assert(tableType == byPtr); (void)tableType;
+    { const BYTE* const* hashTable = (const BYTE* const*) tableBase; return hashTable[h]; }
 }
 
 LZ4_FORCE_INLINE const BYTE*
 LZ4_getPosition(const BYTE* p,
-                const void* tableBase, tableType_t tableType,
-                const BYTE* srcBase)
+                const void* tableBase, tableType_t tableType)
 {
     U32 const h = LZ4_hashPosition(p, tableType);
-    return LZ4_getPositionOnHash(h, tableBase, tableType, srcBase);
+    return LZ4_getPositionOnHash(h, tableBase, tableType);
 }
 
 LZ4_FORCE_INLINE void
@@ -901,9 +921,9 @@ 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.
- *  Presumed already validated at this stage:
+ *  The following conditions are presumed already validated:
  *  - source != NULL
  *  - inputSize > 0
  */
@@ -921,10 +941,10 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
                  const int acceleration)
 {
     int result;
-    const BYTE* ip = (const BYTE*) source;
+    const BYTE* ip = (const BYTE*)source;
 
     U32 const startIndex = cctx->currentOffset;
-    const BYTE* base = (const BYTE*) source - startIndex;
+    const BYTE* base = (const BYTE*)source - startIndex;
     const BYTE* lowLimit;
 
     const LZ4_stream_t_internal* dictCtx = (const LZ4_stream_t_internal*) cctx->dictCtx;
@@ -932,7 +952,8 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
         dictDirective == usingDictCtx ? dictCtx->dictionary : cctx->dictionary;
     const U32 dictSize =
         dictDirective == usingDictCtx ? dictCtx->dictSize : cctx->dictSize;
-    const U32 dictDelta = (dictDirective == usingDictCtx) ? startIndex - dictCtx->currentOffset : 0;   /* make indexes in dictCtx comparable with index in current context */
+    const U32 dictDelta =
+        (dictDirective == usingDictCtx) ? startIndex - dictCtx->currentOffset : 0;   /* make indexes in dictCtx comparable with indexes in current context */
 
     int const maybe_extMem = (dictDirective == usingExtDict) || (dictDirective == usingDictCtx);
     U32 const prefixIdxLimit = startIndex - dictSize;   /* used when dictDirective == dictSmall */
@@ -957,11 +978,11 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
 
     DEBUGLOG(5, "LZ4_compress_generic_validated: srcSize=%i, tableType=%u", inputSize, tableType);
     assert(ip != NULL);
+    if (tableType == byU16) assert(inputSize<LZ4_64Klimit);  /* Size too large (not within 64K limit) */
+    if (tableType == byPtr) assert(dictDirective==noDict);   /* only supported use case with byPtr */
     /* If init conditions are not met, we don't have to mark stream
      * as having dirty context, since no action was taken yet */
     if (outputDirective == fillOutput && maxOutputSize < 1) { return 0; } /* Impossible to store anything */
-    if ((tableType == byU16) && (inputSize>=LZ4_64Klimit)) { return 0; }  /* Size too large (not within 64K limit) */
-    if (tableType==byPtr) assert(dictDirective==noDict);      /* only supported use case with byPtr */
     assert(acceleration >= 1);
 
     lowLimit = (const BYTE*)source - (dictDirective == withPrefix64k ? dictSize : 0);
@@ -981,7 +1002,12 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
     if (inputSize<LZ4_minLength) goto _last_literals;        /* Input too small, no compression (all literals) */
 
     /* First Byte */
-    LZ4_putPosition(ip, cctx->hashTable, tableType, base);
+    {   U32 const h = LZ4_hashPosition(ip, tableType);
+        if (tableType == byPtr) {
+            LZ4_putPositionOnHash(ip, h, cctx->hashTable, byPtr);
+        } else {
+            LZ4_putIndexOnHash(startIndex, h, cctx->hashTable, tableType);
+    }   }
     ip++; forwardH = LZ4_hashPosition(ip, tableType);
 
     /* Main Loop */
@@ -1004,9 +1030,9 @@ LZ4_FORCE_INLINE int LZ4_compress_generic_validated(
                 if (unlikely(forwardIp > mflimitPlusOne)) goto _last_literals;
                 assert(ip < mflimitPlusOne);
 
-                match = LZ4_getPositionOnHash(h, cctx->hashTable, tableType, base);
+                match = LZ4_getPositionOnHash(h, cctx->hashTable, tableType);
                 forwardH = LZ4_hashPosition(forwardIp, tableType);
-                LZ4_putPositionOnHash(ip, h, cctx->hashTable, tableType, base);
+                LZ4_putPositionOnHash(ip, h, cctx->hashTable, tableType);
 
             } while ( (match+LZ4_DISTANCE_MAX < ip)
                    || (LZ4_read32(match) != LZ4_read32(ip)) );
@@ -1077,7 +1103,10 @@ 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);
@@ -1092,7 +1121,7 @@ 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;
@@ -1204,13 +1233,19 @@ _next_match:
         if (ip >= mflimitPlusOne) break;
 
         /* Fill table */
-        LZ4_putPosition(ip-2, cctx->hashTable, tableType, base);
+        {   U32 const h = LZ4_hashPosition(ip-2, tableType);
+            if (tableType == byPtr) {
+                LZ4_putPositionOnHash(ip-2, h, cctx->hashTable, byPtr);
+            } else {
+                U32 const idx = (U32)((ip-2) - base);
+                LZ4_putIndexOnHash(idx, h, cctx->hashTable, tableType);
+        }   }
 
         /* Test next position */
         if (tableType == byPtr) {
 
-            match = LZ4_getPosition(ip, cctx->hashTable, tableType, base);
-            LZ4_putPosition(ip, cctx->hashTable, tableType, base);
+            match = LZ4_getPosition(ip, cctx->hashTable, tableType);
+            LZ4_putPosition(ip, cctx->hashTable, tableType);
             if ( (match+LZ4_DISTANCE_MAX >= ip)
               && (LZ4_read32(match) == LZ4_read32(ip)) )
             { token=op++; *token=0; goto _next_match; }
@@ -1224,6 +1259,7 @@ _next_match:
             if (dictDirective == usingDictCtx) {
                 if (matchIndex < startIndex) {
                     /* there was no match, try the dictionary */
+                    assert(tableType == byU32);
                     matchIndex = LZ4_getIndexOnHash(h, dictCtx->hashTable, byU32);
                     match = dictBase + matchIndex;
                     lowLimit = dictionary;   /* required for match length counter */
@@ -1377,9 +1413,10 @@ int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int
  */
 int LZ4_compress_fast_extState_fastReset(void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration)
 {
-    LZ4_stream_t_internal* ctx = &((LZ4_stream_t*)state)->internal_donotuse;
+    LZ4_stream_t_internal* const ctx = &((LZ4_stream_t*)state)->internal_donotuse;
     if (acceleration < 1) acceleration = LZ4_ACCELERATION_DEFAULT;
     if (acceleration > LZ4_ACCELERATION_MAX) acceleration = LZ4_ACCELERATION_MAX;
+    assert(ctx != NULL);
 
     if (dstCapacity >= LZ4_compressBound(srcSize)) {
         if (srcSize < LZ4_64Klimit) {
@@ -1413,17 +1450,17 @@ int LZ4_compress_fast_extState_fastReset(void* state, const char* src, char* dst
 }
 
 
-int LZ4_compress_fast(const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
+int LZ4_compress_fast(const char* src, char* dest, int srcSize, int dstCapacity, int acceleration)
 {
     int result;
 #if (LZ4_HEAPMODE)
-    LZ4_stream_t* ctxPtr = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));   /* malloc-calloc always properly aligned */
+    LZ4_stream_t* const ctxPtr = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));   /* malloc-calloc always properly aligned */
     if (ctxPtr == NULL) return 0;
 #else
     LZ4_stream_t ctx;
     LZ4_stream_t* const ctxPtr = &ctx;
 #endif
-    result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration);
+    result = LZ4_compress_fast_extState(ctxPtr, src, dest, srcSize, dstCapacity, acceleration);
 
 #if (LZ4_HEAPMODE)
     FREEMEM(ctxPtr);
@@ -1432,43 +1469,51 @@ int LZ4_compress_fast(const char* source, char* dest, int inputSize, int maxOutp
 }
 
 
-int LZ4_compress_default(const char* src, char* dst, int srcSize, int maxOutputSize)
+int LZ4_compress_default(const char* src, char* dst, int srcSize, int dstCapacity)
 {
-    return LZ4_compress_fast(src, dst, srcSize, maxOutputSize, 1);
+    return LZ4_compress_fast(src, dst, srcSize, dstCapacity, 1);
 }
 
 
 /* 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)
 {
 #if (LZ4_HEAPMODE)
-    LZ4_stream_t* ctx = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));   /* malloc-calloc always properly aligned */
+    LZ4_stream_t* const ctx = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));   /* malloc-calloc always properly aligned */
     if (ctx == NULL) return 0;
 #else
     LZ4_stream_t ctxBody;
-    LZ4_stream_t* ctx = &ctxBody;
+    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);
@@ -1537,14 +1582,17 @@ int LZ4_freeStream (LZ4_stream_t* LZ4_stream)
 #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)
+int LZ4_loadDict_internal(LZ4_stream_t* LZ4_dict,
+                    const char* dictionary, int dictSize,
+                    LoadDict_mode_e _ld)
 {
-    LZ4_stream_t_internal* dict = &LZ4_dict->internal_donotuse;
+    LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;
     const tableType_t tableType = byU32;
     const BYTE* p = (const BYTE*)dictionary;
     const BYTE* const dictEnd = p + dictSize;
-    const BYTE* base;
+    U32 idx32;
 
     DEBUGLOG(4, "LZ4_loadDict (%i bytes from %p into %p)", dictSize, dictionary, LZ4_dict);
 
@@ -1567,19 +1615,46 @@ int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
     }
 
     if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
-    base = dictEnd - dict->currentOffset;
     dict->dictionary = p;
     dict->dictSize = (U32)(dictEnd - p);
     dict->tableType = (U32)tableType;
+    idx32 = dict->currentOffset - dict->dictSize;
 
     while (p <= dictEnd-HASH_UNIT) {
-        LZ4_putPosition(p, dict->hashTable, tableType, base);
-        p+=3;
+        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 :
@@ -1711,7 +1786,7 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream,
 /* Hidden debug function, to force-test external dictionary mode */
 int LZ4_compress_forceExtDict (LZ4_stream_t* LZ4_dict, const char* source, char* dest, int srcSize)
 {
-    LZ4_stream_t_internal* streamPtr = &LZ4_dict->internal_donotuse;
+    LZ4_stream_t_internal* const streamPtr = &LZ4_dict->internal_donotuse;
     int result;
 
     LZ4_renormDictT(streamPtr, srcSize);
@@ -1774,7 +1849,7 @@ typedef enum { decode_full_block = 0, partial_decode = 1 } earlyEnd_directive;
  * does not know end of input
  * presumes input is well formed
  * note : will consume at least one byte */
-size_t read_long_length_no_check(const BYTE** pp)
+static size_t read_long_length_no_check(const BYTE** pp)
 {
     size_t b, l = 0;
     do { b = **pp; (*pp)++; l += b; } while (b==255);
@@ -1911,6 +1986,17 @@ read_variable_length(const BYTE** ip, const BYTE* ilimit,
     if (initial_check && unlikely((*ip) >= ilimit)) {    /* read limit reached */
         return rvl_error;
     }
+    s = **ip;
+    (*ip)++;
+    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)) ) {
+        return rvl_error;
+    }
+    if (likely(s != 255)) return length;
     do {
         s = **ip;
         (*ip)++;
@@ -1919,10 +2005,10 @@ read_variable_length(const BYTE** ip, const BYTE* ilimit,
             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;
 }
@@ -1988,63 +2074,73 @@ 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;
         }
 
         /* Fast loop : decode sequences as long as output < oend-FASTLOOP_SAFE_DISTANCE */
+        DEBUGLOG(6, "using fast decode loop");
         while (1) {
             /* Main fastloop assertion: We can always wildcopy FASTLOOP_SAFE_DISTANCE */
             assert(oend - op >= FASTLOOP_SAFE_DISTANCE);
             assert(ip < iend);
             token = *ip++;
             length = token >> ML_BITS;  /* literal length */
+            DEBUGLOG(7, "blockPos%6u: litLength token = %u", (unsigned)(op-(BYTE*)dst), (unsigned)length);
 
             /* decode literal length */
             if (length == RUN_MASK) {
                 size_t const addl = read_variable_length(&ip, iend-RUN_MASK, 1);
-                if (addl == rvl_error) { goto _output_error; }
+                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 */
                 if (unlikely((uptrval)(ip)+length<(uptrval)(ip))) { goto _output_error; } /* overflow detection */
 
                 /* copy literals */
-                cpy = op+length;
                 LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
-                if ((cpy>oend-32) || (ip+length>iend-32)) { goto safe_literal_copy; }
-                LZ4_wildCopy32(op, ip, cpy);
-                ip += length; op = cpy;
-            } else {
-                cpy = op+length;
-                DEBUGLOG(7, "copy %u bytes in a 16-bytes stripe", (unsigned)length);
+                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 */
-                if (ip > iend-(16 + 1/*max lit + offset + nextToken*/)) { goto safe_literal_copy; }
+                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 = cpy;
+                ip += length; op += length;
+            } else {
+                goto safe_literal_copy;
             }
 
             /* get offset */
             offset = LZ4_readLE16(ip); ip+=2;
+            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);
-                if (addl == rvl_error) { goto _output_error; }
+                if (addl == rvl_error) {
+                    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 ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) { goto _output_error; } /* Error : offset outside buffers */
                 if (op + length >= oend - FASTLOOP_SAFE_DISTANCE) {
                     goto safe_match_copy;
                 }
             } 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;
                 }
 
@@ -2062,7 +2158,10 @@ LZ4_decompress_generic(
                         continue;
             }   }   }
 
-            if (checkOffset && (unlikely(match + dictSize < lowPrefix))) { goto _output_error; } /* Error : offset outside buffers */
+            if ( checkOffset && (unlikely(match + dictSize < lowPrefix)) ) {
+                DEBUGLOG(5, "Error : pos=%zi, offset=%zi => outside buffers", op-lowPrefix, op-match);
+                goto _output_error;
+            }
             /* match starting within external dictionary */
             if ((dict==usingExtDict) && (match < lowPrefix)) {
                 assert(dictEnd != NULL);
@@ -2071,7 +2170,8 @@ LZ4_decompress_generic(
                         DEBUGLOG(7, "partialDecoding: dictionary match, close to dstEnd");
                         length = MIN(length, (size_t)(oend-op));
                     } else {
-                        goto _output_error;  /* end-of-block condition violated */
+                        DEBUGLOG(6, "end-of-block condition violated")
+                        goto _output_error;
                 }   }
 
                 if (length <= (size_t)(lowPrefix-match)) {
@@ -2111,10 +2211,12 @@ LZ4_decompress_generic(
 #endif
 
         /* Main Loop : decode remaining sequences where output < FASTLOOP_SAFE_DISTANCE */
+        DEBUGLOG(6, "using safe decode loop");
         while (1) {
             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,
@@ -2135,6 +2237,7 @@ 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 */
@@ -2166,11 +2269,12 @@ LZ4_decompress_generic(
                 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))) {
                 /* We've either hit the input parsing restriction or the output parsing restriction.
@@ -2206,9 +2310,10 @@ 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)", ip, (int)length, ip+length, iend);
+                        DEBUGLOG(5, "or cpy(%p) > (oend-MFLIMIT)(%p)", cpy, oend-MFLIMIT);
+                        DEBUGLOG(5, "after writing %u bytes / %i bytes available", (unsigned)(op-(BYTE*)dst), outputSize);
                         goto _output_error;
                     }
                 }
@@ -2234,6 +2339,7 @@ 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) {
@@ -2323,7 +2429,7 @@ 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 */
         }
@@ -2418,6 +2524,7 @@ int LZ4_decompress_safe_forceExtDict(const char* source, char* dest,
                                      int compressedSize, int maxOutputSize,
                                      const void* dictStart, size_t dictSize)
 {
+    DEBUGLOG(5, "LZ4_decompress_safe_forceExtDict");
     return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize,
                                   decode_full_block, usingExtDict,
                                   (BYTE*)dest, (const BYTE*)dictStart, dictSize);

lz4.mod/lz4/lib/lz4.h

@@ -1,7 +1,7 @@
 /*
  *  LZ4 - Fast LZ compression algorithm
  *  Header File
- *  Copyright (C) 2011-2020, Yann Collet.
+ *  Copyright (C) 2011-2023, Yann Collet.
 
    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
@@ -189,8 +191,9 @@ LZ4LIB_API const char* LZ4_versionString (void);   /**< library version string;
 LZ4LIB_API int LZ4_compress_default(const char* src, char* dst, int srcSize, int dstCapacity);
 
 /*! 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), presumed an upper bound of decompressed size.
+ * @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.
@@ -242,20 +245,20 @@ 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 un v1.9.2+):
+ * 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.
@@ -266,8 +269,7 @@ 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',
@@ -311,7 +313,7 @@ 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).
@@ -361,13 +363,58 @@ 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.
@@ -443,11 +490,24 @@ LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const
 LZ4LIB_API int LZ4_decoderRingBufferSize(int maxBlockSize);
 #define LZ4_DECODER_RING_BUFFER_SIZE(maxBlockSize) (65536 + 14 + (maxBlockSize))  /* for static allocation; maxBlockSize presumed valid */
 
-/*! LZ4_decompress_*_continue() :
- *  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.
+/*! LZ4_decompress_safe_continue() :
+ *  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 :
@@ -474,10 +534,10 @@ LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
                         int srcSize, int dstCapacity);
 
 
-/*! LZ4_decompress_*_usingDict() :
- *  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.
+/*! LZ4_decompress_safe_usingDict() :
+ *  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.
@@ -487,6 +547,12 @@ LZ4_decompress_safe_usingDict(const char* src, char* dst,
                               int srcSize, int dstCapacity,
                               const char* dictStart, int dictSize);
 
+/*! LZ4_decompress_safe_partial_usingDict() :
+ *  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.
+ */
 LZ4LIB_API int
 LZ4_decompress_safe_partial_usingDict(const char* src, char* dst,
                                       int compressedSize,
@@ -526,9 +592,9 @@ 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
 
 
@@ -544,36 +610,11 @@ 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
  *
@@ -685,7 +726,7 @@ 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;
@@ -706,7 +747,7 @@ 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 :
@@ -818,11 +859,12 @@ 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() :

lz4.mod/lz4/lib/lz4file.c

@@ -31,11 +31,21 @@
  * - LZ4 homepage : http://www.lz4.org
  * - LZ4 source repository : https://github.com/lz4/lz4
  */
-#include <stdlib.h>
+#include <stdlib.h>  /* malloc, free */
 #include <string.h>
+#include <assert.h>
 #include "lz4.h"
 #include "lz4file.h"
 
+static LZ4F_errorCode_t returnErrorCode(LZ4F_errorCodes code)
+{
+    return (LZ4F_errorCode_t)-(ptrdiff_t)code;
+}
+#undef RETURN_ERROR
+#define RETURN_ERROR(e) return returnErrorCode(LZ4F_ERROR_ ## e)
+
+/* =====   read API   ===== */
+
 struct LZ4_readFile_s {
   LZ4F_dctx* dctxPtr;
   FILE* fp;
@@ -45,76 +55,80 @@ struct LZ4_readFile_s {
   size_t srcBufMaxSize;
 };
 
-struct LZ4_writeFile_s {
-  LZ4F_cctx* cctxPtr;
-  FILE* fp;
-  LZ4_byte* dstBuf;
-  size_t maxWriteSize;
-  size_t dstBufMaxSize;
-  LZ4F_errorCode_t errCode;
-};
+static void LZ4F_freeReadFile(LZ4_readFile_t* lz4fRead)
+{
+  if (lz4fRead==NULL) return;
+  LZ4F_freeDecompressionContext(lz4fRead->dctxPtr);
+  free(lz4fRead->srcBuf);
+  free(lz4fRead);
+}
+
+static void LZ4F_freeAndNullReadFile(LZ4_readFile_t** statePtr)
+{
+  assert(statePtr != NULL);
+  LZ4F_freeReadFile(*statePtr);
+  *statePtr = NULL;
+}
 
 LZ4F_errorCode_t LZ4F_readOpen(LZ4_readFile_t** lz4fRead, FILE* fp)
 {
   char buf[LZ4F_HEADER_SIZE_MAX];
   size_t consumedSize;
   LZ4F_errorCode_t ret;
-  LZ4F_frameInfo_t info;
 
   if (fp == NULL || lz4fRead == NULL) {
-    return -LZ4F_ERROR_GENERIC;
+    RETURN_ERROR(parameter_null);
   }
 
   *lz4fRead = (LZ4_readFile_t*)calloc(1, sizeof(LZ4_readFile_t));
   if (*lz4fRead == NULL) {
-    return -LZ4F_ERROR_allocation_failed;
+    RETURN_ERROR(allocation_failed);
   }
 
-  ret = LZ4F_createDecompressionContext(&(*lz4fRead)->dctxPtr, LZ4F_getVersion());
+  ret = LZ4F_createDecompressionContext(&(*lz4fRead)->dctxPtr, LZ4F_VERSION);
   if (LZ4F_isError(ret)) {
-    free(*lz4fRead);
+    LZ4F_freeAndNullReadFile(lz4fRead);
     return ret;
   }
 
   (*lz4fRead)->fp = fp;
   consumedSize = fread(buf, 1, sizeof(buf), (*lz4fRead)->fp);
   if (consumedSize != sizeof(buf)) {
-    free(*lz4fRead);
-    return -LZ4F_ERROR_GENERIC;
+    LZ4F_freeAndNullReadFile(lz4fRead);
+    RETURN_ERROR(io_read);
   }
 
-  ret = LZ4F_getFrameInfo((*lz4fRead)->dctxPtr, &info, buf, &consumedSize);
-  if (LZ4F_isError(ret)) {
-      LZ4F_freeDecompressionContext((*lz4fRead)->dctxPtr);
-      free(*lz4fRead);
-      return ret;
+  { LZ4F_frameInfo_t info;
+    LZ4F_errorCode_t const r = LZ4F_getFrameInfo((*lz4fRead)->dctxPtr, &info, buf, &consumedSize);
+    if (LZ4F_isError(r)) {
+      LZ4F_freeAndNullReadFile(lz4fRead);
+      return r;
     }
 
-  switch (info.blockSizeID) {
-    case LZ4F_default :
-    case LZ4F_max64KB :
-      (*lz4fRead)->srcBufMaxSize = 64 * 1024;
-      break;
-    case LZ4F_max256KB:
-      (*lz4fRead)->srcBufMaxSize = 256 * 1024;
-      break;
-    case LZ4F_max1MB:
-      (*lz4fRead)->srcBufMaxSize = 1 * 1024 * 1024;
-      break;
-    case LZ4F_max4MB:
-      (*lz4fRead)->srcBufMaxSize = 4 * 1024 * 1024;
-      break;
-    default:
-      LZ4F_freeDecompressionContext((*lz4fRead)->dctxPtr);
-      free(*lz4fRead);
-      return -LZ4F_ERROR_maxBlockSize_invalid;
+    switch (info.blockSizeID) {
+      case LZ4F_default :
+      case LZ4F_max64KB :
+        (*lz4fRead)->srcBufMaxSize = 64 * 1024;
+        break;
+      case LZ4F_max256KB:
+        (*lz4fRead)->srcBufMaxSize = 256 * 1024;
+        break;
+      case LZ4F_max1MB:
+        (*lz4fRead)->srcBufMaxSize = 1 * 1024 * 1024;
+        break;
+      case LZ4F_max4MB:
+        (*lz4fRead)->srcBufMaxSize = 4 * 1024 * 1024;
+        break;
+      default:
+        LZ4F_freeAndNullReadFile(lz4fRead);
+        RETURN_ERROR(maxBlockSize_invalid);
+    }
   }
 
   (*lz4fRead)->srcBuf = (LZ4_byte*)malloc((*lz4fRead)->srcBufMaxSize);
   if ((*lz4fRead)->srcBuf == NULL) {
-    LZ4F_freeDecompressionContext((*lz4fRead)->dctxPtr);
-    free(lz4fRead);
-    return -LZ4F_ERROR_allocation_failed;
+    LZ4F_freeAndNullReadFile(lz4fRead);
+    RETURN_ERROR(allocation_failed);
   }
 
   (*lz4fRead)->srcBufSize = sizeof(buf) - consumedSize;
@@ -129,7 +143,7 @@ size_t LZ4F_read(LZ4_readFile_t* lz4fRead, void* buf, size_t size)
   size_t next = 0;
 
   if (lz4fRead == NULL || buf == NULL)
-    return -LZ4F_ERROR_GENERIC;
+    RETURN_ERROR(parameter_null);
 
   while (next < size) {
     size_t srcsize = lz4fRead->srcBufSize - lz4fRead->srcBufNext;
@@ -142,12 +156,10 @@ size_t LZ4F_read(LZ4_readFile_t* lz4fRead, void* buf, size_t size)
         lz4fRead->srcBufSize = ret;
         srcsize = lz4fRead->srcBufSize;
         lz4fRead->srcBufNext = 0;
-      }
-      else if (ret == 0) {
+      } else if (ret == 0) {
         break;
-      }
-      else {
-        return -LZ4F_ERROR_GENERIC;
+      } else {
+        RETURN_ERROR(io_read);
       }
     }
 
@@ -171,24 +183,48 @@ size_t LZ4F_read(LZ4_readFile_t* lz4fRead, void* buf, size_t size)
 LZ4F_errorCode_t LZ4F_readClose(LZ4_readFile_t* lz4fRead)
 {
   if (lz4fRead == NULL)
-    return -LZ4F_ERROR_GENERIC;
-  LZ4F_freeDecompressionContext(lz4fRead->dctxPtr);
-  free(lz4fRead->srcBuf);
-  free(lz4fRead);
+    RETURN_ERROR(parameter_null);
+  LZ4F_freeReadFile(lz4fRead);
   return LZ4F_OK_NoError;
 }
 
+/* =====   write API   ===== */
+
+struct LZ4_writeFile_s {
+  LZ4F_cctx* cctxPtr;
+  FILE* fp;
+  LZ4_byte* dstBuf;
+  size_t maxWriteSize;
+  size_t dstBufMaxSize;
+  LZ4F_errorCode_t errCode;
+};
+
+static void LZ4F_freeWriteFile(LZ4_writeFile_t* state)
+{
+  if (state == NULL) return;
+  LZ4F_freeCompressionContext(state->cctxPtr);
+  free(state->dstBuf);
+  free(state);
+}
+
+static void LZ4F_freeAndNullWriteFile(LZ4_writeFile_t** statePtr)
+{
+  assert(statePtr != NULL);
+  LZ4F_freeWriteFile(*statePtr);
+  *statePtr = NULL;
+}
+
 LZ4F_errorCode_t LZ4F_writeOpen(LZ4_writeFile_t** lz4fWrite, FILE* fp, const LZ4F_preferences_t* prefsPtr)
 {
   LZ4_byte buf[LZ4F_HEADER_SIZE_MAX];
   size_t ret;
 
   if (fp == NULL || lz4fWrite == NULL)
-    return -LZ4F_ERROR_GENERIC;
+    RETURN_ERROR(parameter_null);
 
-  *lz4fWrite = (LZ4_writeFile_t*)malloc(sizeof(LZ4_writeFile_t));
+  *lz4fWrite = (LZ4_writeFile_t*)calloc(1, sizeof(LZ4_writeFile_t));
   if (*lz4fWrite == NULL) {
-    return -LZ4F_ERROR_allocation_failed;
+    RETURN_ERROR(allocation_failed);
   }
   if (prefsPtr != NULL) {
     switch (prefsPtr->frameInfo.blockSizeID) {
@@ -206,8 +242,8 @@ LZ4F_errorCode_t LZ4F_writeOpen(LZ4_writeFile_t** lz4fWrite, FILE* fp, const LZ4
         (*lz4fWrite)->maxWriteSize = 4 * 1024 * 1024;
         break;
       default:
-        free(lz4fWrite);
-        return -LZ4F_ERROR_maxBlockSize_invalid;
+        LZ4F_freeAndNullWriteFile(lz4fWrite);
+        RETURN_ERROR(maxBlockSize_invalid);
       }
     } else {
       (*lz4fWrite)->maxWriteSize = 64 * 1024;
@@ -216,30 +252,25 @@ LZ4F_errorCode_t LZ4F_writeOpen(LZ4_writeFile_t** lz4fWrite, FILE* fp, const LZ4
   (*lz4fWrite)->dstBufMaxSize = LZ4F_compressBound((*lz4fWrite)->maxWriteSize, prefsPtr);
   (*lz4fWrite)->dstBuf = (LZ4_byte*)malloc((*lz4fWrite)->dstBufMaxSize);
   if ((*lz4fWrite)->dstBuf == NULL) {
-    free(*lz4fWrite);
-    return -LZ4F_ERROR_allocation_failed;
+    LZ4F_freeAndNullWriteFile(lz4fWrite);
+    RETURN_ERROR(allocation_failed);
   }
 
-  ret = LZ4F_createCompressionContext(&(*lz4fWrite)->cctxPtr, LZ4F_getVersion());
+  ret = LZ4F_createCompressionContext(&(*lz4fWrite)->cctxPtr, LZ4F_VERSION);
   if (LZ4F_isError(ret)) {
-      free((*lz4fWrite)->dstBuf);
-      free(*lz4fWrite);
+      LZ4F_freeAndNullWriteFile(lz4fWrite);
       return ret;
   }
 
   ret = LZ4F_compressBegin((*lz4fWrite)->cctxPtr, buf, LZ4F_HEADER_SIZE_MAX, prefsPtr);
   if (LZ4F_isError(ret)) {
-      LZ4F_freeCompressionContext((*lz4fWrite)->cctxPtr);
-      free((*lz4fWrite)->dstBuf);
-      free(*lz4fWrite);
+      LZ4F_freeAndNullWriteFile(lz4fWrite);
       return ret;
   }
 
   if (ret != fwrite(buf, 1, ret, fp)) {
-    LZ4F_freeCompressionContext((*lz4fWrite)->cctxPtr);
-    free((*lz4fWrite)->dstBuf);
-    free(*lz4fWrite);
-    return -LZ4F_ERROR_GENERIC;
+    LZ4F_freeAndNullWriteFile(lz4fWrite);
+    RETURN_ERROR(io_write);
   }
 
   (*lz4fWrite)->fp = fp;
@@ -247,15 +278,15 @@ LZ4F_errorCode_t LZ4F_writeOpen(LZ4_writeFile_t** lz4fWrite, FILE* fp, const LZ4
   return LZ4F_OK_NoError;
 }
 
-size_t LZ4F_write(LZ4_writeFile_t* lz4fWrite, void* buf, size_t size)
+size_t LZ4F_write(LZ4_writeFile_t* lz4fWrite, const void* buf, size_t size)
 {
-  LZ4_byte* p = (LZ4_byte*)buf;
+  const LZ4_byte* p = (const LZ4_byte*)buf;
   size_t remain = size;
   size_t chunk;
   size_t ret;
 
   if (lz4fWrite == NULL || buf == NULL)
-    return -LZ4F_ERROR_GENERIC;
+    RETURN_ERROR(parameter_null);
   while (remain) {
     if (remain > lz4fWrite->maxWriteSize)
       chunk = lz4fWrite->maxWriteSize;
@@ -271,9 +302,9 @@ size_t LZ4F_write(LZ4_writeFile_t* lz4fWrite, void* buf, size_t size)
       return ret;
     }
 
-    if(ret != fwrite(lz4fWrite->dstBuf, 1, ret, lz4fWrite->fp)) {
-      lz4fWrite->errCode = -LZ4F_ERROR_GENERIC;
-      return -LZ4F_ERROR_GENERIC;
+    if (ret != fwrite(lz4fWrite->dstBuf, 1, ret, lz4fWrite->fp)) {
+      lz4fWrite->errCode = returnErrorCode(LZ4F_ERROR_io_write);
+      RETURN_ERROR(io_write);
     }
 
     p += chunk;
@@ -287,8 +318,9 @@ LZ4F_errorCode_t LZ4F_writeClose(LZ4_writeFile_t* lz4fWrite)
 {
   LZ4F_errorCode_t ret = LZ4F_OK_NoError;
 
-  if (lz4fWrite == NULL)
-    return -LZ4F_ERROR_GENERIC;
+  if (lz4fWrite == NULL) {
+    RETURN_ERROR(parameter_null);
+  }
 
   if (lz4fWrite->errCode == LZ4F_OK_NoError) {
     ret =  LZ4F_compressEnd(lz4fWrite->cctxPtr,
@@ -299,13 +331,11 @@ LZ4F_errorCode_t LZ4F_writeClose(LZ4_writeFile_t* lz4fWrite)
     }
 
     if (ret != fwrite(lz4fWrite->dstBuf, 1, ret, lz4fWrite->fp)) {
-      ret = -LZ4F_ERROR_GENERIC;
+      ret = returnErrorCode(LZ4F_ERROR_io_write);
     }
   }
 
 out:
-  LZ4F_freeCompressionContext(lz4fWrite->cctxPtr);
-  free(lz4fWrite->dstBuf);
-  free(lz4fWrite);
+  LZ4F_freeWriteFile(lz4fWrite);
   return ret;
 }

lz4.mod/lz4/lib/lz4file.h

@@ -38,7 +38,7 @@ extern "C" {
 #ifndef LZ4FILE_H
 #define LZ4FILE_H
 
-#include <stdio.h>
+#include <stdio.h>  /* FILE* */
 #include "lz4frame_static.h"
 
 typedef struct LZ4_readFile_s LZ4_readFile_t;
@@ -78,7 +78,7 @@ LZ4FLIB_STATIC_API LZ4F_errorCode_t LZ4F_writeOpen(LZ4_writeFile_t** lz4fWrite,
  * `buf` write data buffer.
  * `size` write data buffer size.
  */
-LZ4FLIB_STATIC_API size_t LZ4F_write(LZ4_writeFile_t* lz4fWrite, void* buf, size_t size);
+LZ4FLIB_STATIC_API size_t LZ4F_write(LZ4_writeFile_t* lz4fWrite, const void* buf, size_t size);
 
 /*! LZ4F_writeClose() :
  * Close lz4file handle.

lz4.mod/lz4/lib/lz4frame.c

@@ -44,6 +44,7 @@
 /*-************************************
 *  Compiler Options
 **************************************/
+#include <limits.h>
 #ifdef _MSC_VER    /* Visual Studio */
 #  pragma warning(disable : 4127)   /* disable: C4127: conditional expression is constant */
 #endif
@@ -54,8 +55,8 @@
 **************************************/
 /*
  * LZ4F_HEAPMODE :
- * Select how default compression functions will allocate memory for their hash table,
- * in memory stack (0:default, fastest), or in memory heap (1:requires malloc()).
+ * Control how LZ4F_compressFrame allocates the Compression State,
+ * either on stack (0:default, fastest), or in memory heap (1:requires malloc()).
  */
 #ifndef LZ4F_HEAPMODE
 #  define LZ4F_HEAPMODE 0
@@ -125,8 +126,9 @@ static void* LZ4F_malloc(size_t s, LZ4F_CustomMem cmem)
 
 static void LZ4F_free(void* p, LZ4F_CustomMem cmem)
 {
-    /* custom malloc defined : use it */
+    if (p == NULL) return;
     if (cmem.customFree != NULL) {
+        /* custom allocation defined : use it */
         cmem.customFree(cmem.opaqueState, p);
         return;
     }
@@ -153,7 +155,7 @@ static void LZ4F_free(void* p, LZ4F_CustomMem cmem)
 static int g_debuglog_enable = 1;
 #  define DEBUGLOG(l, ...) {                                  \
                 if ((g_debuglog_enable) && (l<=LZ4_DEBUG)) {  \
-                    fprintf(stderr, __FILE__ ": ");           \
+                    fprintf(stderr, __FILE__ " (%i): ", __LINE__ );  \
                     fprintf(stderr, __VA_ARGS__);             \
                     fprintf(stderr, " \n");                   \
             }   }
@@ -186,9 +188,9 @@ static U32 LZ4F_readLE32 (const void* src)
 {
     const BYTE* const srcPtr = (const BYTE*)src;
     U32 value32 = srcPtr[0];
-    value32 += ((U32)srcPtr[1])<< 8;
-    value32 += ((U32)srcPtr[2])<<16;
-    value32 += ((U32)srcPtr[3])<<24;
+    value32 |= ((U32)srcPtr[1])<< 8;
+    value32 |= ((U32)srcPtr[2])<<16;
+    value32 |= ((U32)srcPtr[3])<<24;
     return value32;
 }
 
@@ -205,13 +207,13 @@ static U64 LZ4F_readLE64 (const void* src)
 {
     const BYTE* const srcPtr = (const BYTE*)src;
     U64 value64 = srcPtr[0];
-    value64 += ((U64)srcPtr[1]<<8);
-    value64 += ((U64)srcPtr[2]<<16);
-    value64 += ((U64)srcPtr[3]<<24);
-    value64 += ((U64)srcPtr[4]<<32);
-    value64 += ((U64)srcPtr[5]<<40);
-    value64 += ((U64)srcPtr[6]<<48);
-    value64 += ((U64)srcPtr[7]<<56);
+    value64 |= ((U64)srcPtr[1]<<8);
+    value64 |= ((U64)srcPtr[2]<<16);
+    value64 |= ((U64)srcPtr[3]<<24);
+    value64 |= ((U64)srcPtr[4]<<32);
+    value64 |= ((U64)srcPtr[5]<<40);
+    value64 |= ((U64)srcPtr[6]<<48);
+    value64 |= ((U64)srcPtr[7]<<56);
     return value64;
 }
 
@@ -257,14 +259,15 @@ static const size_t BFSize = LZ4F_BLOCK_CHECKSUM_SIZE;  /* block footer : checks
 *  Structures and local types
 **************************************/
 
-typedef enum { LZ4B_COMPRESSED, LZ4B_UNCOMPRESSED} LZ4F_blockCompression_t;
+typedef enum { LZ4B_COMPRESSED, LZ4B_UNCOMPRESSED} LZ4F_BlockCompressMode_e;
+typedef enum { ctxNone, ctxFast, ctxHC } LZ4F_CtxType_e;
 
 typedef struct LZ4F_cctx_s
 {
     LZ4F_CustomMem cmem;
     LZ4F_preferences_t prefs;
     U32    version;
-    U32    cStage;
+    U32    cStage;     /* 0 : compression uninitialized ; 1 : initialized, can compress */
     const LZ4F_CDict* cdict;
     size_t maxBlockSize;
     size_t maxBufferSize;
@@ -275,8 +278,8 @@ typedef struct LZ4F_cctx_s
     XXH32_state_t xxh;
     void*  lz4CtxPtr;
     U16    lz4CtxAlloc; /* sized for: 0 = none, 1 = lz4 ctx, 2 = lz4hc ctx */
-    U16    lz4CtxState; /* in use as: 0 = none, 1 = lz4 ctx, 2 = lz4hc ctx */
-    LZ4F_blockCompression_t  blockCompression;
+    U16    lz4CtxType;  /* in use as: 0 = none, 1 = lz4 ctx, 2 = lz4hc ctx */
+    LZ4F_BlockCompressMode_e  blockCompressMode;
 } LZ4F_cctx_t;
 
 
@@ -314,9 +317,14 @@ static LZ4F_errorCode_t LZ4F_returnErrorCode(LZ4F_errorCodes code)
 
 #define RETURN_ERROR(e) return LZ4F_returnErrorCode(LZ4F_ERROR_ ## e)
 
-#define RETURN_ERROR_IF(c,e) if (c) RETURN_ERROR(e)
+#define RETURN_ERROR_IF(c,e) do {  \
+        if (c) {                   \
+            DEBUGLOG(3, "Error: " #c); \
+            RETURN_ERROR(e);       \
+        }                          \
+    } while (0)
 
-#define FORWARD_IF_ERROR(r)  if (LZ4F_isError(r)) return (r)
+#define FORWARD_IF_ERROR(r) do { if (LZ4F_isError(r)) return (r); } while (0)
 
 unsigned LZ4F_getVersion(void) { return LZ4F_VERSION; }
 
@@ -429,6 +437,7 @@ size_t LZ4F_compressFrame_usingCDict(LZ4F_cctx* cctx,
     BYTE* dstPtr = dstStart;
     BYTE* const dstEnd = dstStart + dstCapacity;
 
+    DEBUGLOG(4, "LZ4F_compressFrame_usingCDict (srcSize=%u)", (unsigned)srcSize);
     if (preferencesPtr!=NULL)
         prefs = *preferencesPtr;
     else
@@ -494,7 +503,7 @@ size_t LZ4F_compressFrame(void* dstBuffer, size_t dstCapacity,
         LZ4_initStream(&lz4ctx, sizeof(lz4ctx));
         cctxPtr->lz4CtxPtr = &lz4ctx;
         cctxPtr->lz4CtxAlloc = 1;
-        cctxPtr->lz4CtxState = 1;
+        cctxPtr->lz4CtxType = ctxFast;
     }
 #endif
     DEBUGLOG(4, "LZ4F_compressFrame");
@@ -539,18 +548,19 @@ LZ4F_createCDict_advanced(LZ4F_CustomMem cmem, const void* dictBuffer, size_t di
         dictSize = 64 KB;
     }
     cdict->dictContent = LZ4F_malloc(dictSize, cmem);
+    /* note: using @cmem to allocate => can't use default create */
     cdict->fastCtx = (LZ4_stream_t*)LZ4F_malloc(sizeof(LZ4_stream_t), cmem);
-    if (cdict->fastCtx)
-        LZ4_initStream(cdict->fastCtx, sizeof(LZ4_stream_t));
     cdict->HCCtx = (LZ4_streamHC_t*)LZ4F_malloc(sizeof(LZ4_streamHC_t), cmem);
-    if (cdict->HCCtx)
-        LZ4_initStream(cdict->HCCtx, sizeof(LZ4_streamHC_t));
     if (!cdict->dictContent || !cdict->fastCtx || !cdict->HCCtx) {
         LZ4F_freeCDict(cdict);
         return NULL;
     }
     memcpy(cdict->dictContent, dictStart, dictSize);
-    LZ4_loadDict (cdict->fastCtx, (const char*)cdict->dictContent, (int)dictSize);
+    LZ4_initStream(cdict->fastCtx, sizeof(LZ4_stream_t));
+    LZ4_loadDictSlow(cdict->fastCtx, (const char*)cdict->dictContent, (int)dictSize);
+    LZ4_initStreamHC(cdict->HCCtx, sizeof(LZ4_streamHC_t));
+    /* note: we don't know at this point which compression level is going to be used
+     * as a consequence, HCCtx is created for the more common HC mode */
     LZ4_setCompressionLevel(cdict->HCCtx, LZ4HC_CLEVEL_DEFAULT);
     LZ4_loadDictHC(cdict->HCCtx, (const char*)cdict->dictContent, (int)dictSize);
     return cdict;
@@ -616,7 +626,6 @@ LZ4F_createCompressionContext(LZ4F_cctx** LZ4F_compressionContextPtr, unsigned v
     return LZ4F_OK_NoError;
 }
 
-
 LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctxPtr)
 {
     if (cctxPtr != NULL) {  /* support free on NULL */
@@ -641,7 +650,7 @@ static void LZ4F_initStream(void* ctx,
                             int level,
                             LZ4F_blockMode_t blockMode) {
     if (level < LZ4HC_CLEVEL_MIN) {
-        if (cdict != NULL || blockMode == LZ4F_blockLinked) {
+        if (cdict || blockMode == LZ4F_blockLinked) {
             /* In these cases, we will call LZ4_compress_fast_continue(),
              * which needs an already reset context. Otherwise, we'll call a
              * one-shot API. The non-continued APIs internally perform their own
@@ -649,11 +658,18 @@ static void LZ4F_initStream(void* ctx,
              * tableType they need the context to be in. So in that case this
              * would be misguided / wasted work. */
             LZ4_resetStream_fast((LZ4_stream_t*)ctx);
+            if (cdict)
+                LZ4_attach_dictionary((LZ4_stream_t*)ctx, cdict->fastCtx);
         }
-        LZ4_attach_dictionary((LZ4_stream_t *)ctx, cdict ? cdict->fastCtx : NULL);
+        /* In these cases, we'll call a one-shot API.
+         * The non-continued APIs internally perform their own resets
+         * at the beginning of their calls, where they know
+         * which tableType they need the context to be in.
+         * Therefore, a reset here would be wasted work. */
     } else {
         LZ4_resetStreamHC_fast((LZ4_streamHC_t*)ctx, level);
-        LZ4_attach_HC_dictionary((LZ4_streamHC_t *)ctx, cdict ? cdict->HCCtx : NULL);
+        if (cdict)
+            LZ4_attach_HC_dictionary((LZ4_streamHC_t*)ctx, cdict->HCCtx);
     }
 }
 
@@ -668,14 +684,12 @@ static int ctxTypeID_to_size(int ctxTypeID) {
     }
 }
 
-/*! LZ4F_compressBegin_usingCDict() :
- *  init streaming compression AND writes frame header into @dstBuffer.
- * @dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
- * @return : number of bytes written into @dstBuffer for the header
- *           or an error code (can be tested using LZ4F_isError())
+/* LZ4F_compressBegin_internal()
+ * Note: only accepts @cdict _or_ @dictBuffer as non NULL.
  */
-size_t LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctxPtr,
+size_t LZ4F_compressBegin_internal(LZ4F_cctx* cctx,
                           void* dstBuffer, size_t dstCapacity,
+                          const void* dictBuffer, size_t dictSize,
                           const LZ4F_CDict* cdict,
                           const LZ4F_preferences_t* preferencesPtr)
 {
@@ -685,71 +699,85 @@ size_t LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctxPtr,
 
     RETURN_ERROR_IF(dstCapacity < maxFHSize, dstMaxSize_tooSmall);
     if (preferencesPtr == NULL) preferencesPtr = &prefNull;
-    cctxPtr->prefs = *preferencesPtr;
+    cctx->prefs = *preferencesPtr;
 
     /* cctx Management */
-    {   U16 const ctxTypeID = (cctxPtr->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) ? 1 : 2;
+    {   U16 const ctxTypeID = (cctx->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) ? 1 : 2;
         int requiredSize = ctxTypeID_to_size(ctxTypeID);
-        int allocatedSize = ctxTypeID_to_size(cctxPtr->lz4CtxAlloc);
+        int allocatedSize = ctxTypeID_to_size(cctx->lz4CtxAlloc);
         if (allocatedSize < requiredSize) {
             /* not enough space allocated */
-            LZ4F_free(cctxPtr->lz4CtxPtr, cctxPtr->cmem);
-            if (cctxPtr->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) {
+            LZ4F_free(cctx->lz4CtxPtr, cctx->cmem);
+            if (cctx->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) {
                 /* must take ownership of memory allocation,
                  * in order to respect custom allocator contract */
-                cctxPtr->lz4CtxPtr = LZ4F_malloc(sizeof(LZ4_stream_t), cctxPtr->cmem);
-                if (cctxPtr->lz4CtxPtr)
-                    LZ4_initStream(cctxPtr->lz4CtxPtr, sizeof(LZ4_stream_t));
+                cctx->lz4CtxPtr = LZ4F_malloc(sizeof(LZ4_stream_t), cctx->cmem);
+                if (cctx->lz4CtxPtr)
+                    LZ4_initStream(cctx->lz4CtxPtr, sizeof(LZ4_stream_t));
             } else {
-                cctxPtr->lz4CtxPtr = LZ4F_malloc(sizeof(LZ4_streamHC_t), cctxPtr->cmem);
-                if (cctxPtr->lz4CtxPtr)
-                    LZ4_initStreamHC(cctxPtr->lz4CtxPtr, sizeof(LZ4_streamHC_t));
+                cctx->lz4CtxPtr = LZ4F_malloc(sizeof(LZ4_streamHC_t), cctx->cmem);
+                if (cctx->lz4CtxPtr)
+                    LZ4_initStreamHC(cctx->lz4CtxPtr, sizeof(LZ4_streamHC_t));
             }
-            RETURN_ERROR_IF(cctxPtr->lz4CtxPtr == NULL, allocation_failed);
-            cctxPtr->lz4CtxAlloc = ctxTypeID;
-            cctxPtr->lz4CtxState = ctxTypeID;
-        } else if (cctxPtr->lz4CtxState != ctxTypeID) {
+            RETURN_ERROR_IF(cctx->lz4CtxPtr == NULL, allocation_failed);
+            cctx->lz4CtxAlloc = ctxTypeID;
+            cctx->lz4CtxType = ctxTypeID;
+        } else if (cctx->lz4CtxType != ctxTypeID) {
             /* otherwise, a sufficient buffer is already allocated,
              * but we need to reset it to the correct context type */
-            if (cctxPtr->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) {
-                LZ4_initStream((LZ4_stream_t*)cctxPtr->lz4CtxPtr, sizeof(LZ4_stream_t));
+            if (cctx->prefs.compressionLevel < LZ4HC_CLEVEL_MIN) {
+                LZ4_initStream((LZ4_stream_t*)cctx->lz4CtxPtr, sizeof(LZ4_stream_t));
             } else {
-                LZ4_initStreamHC((LZ4_streamHC_t*)cctxPtr->lz4CtxPtr, sizeof(LZ4_streamHC_t));
-                LZ4_setCompressionLevel((LZ4_streamHC_t*)cctxPtr->lz4CtxPtr, cctxPtr->prefs.compressionLevel);
+                LZ4_initStreamHC((LZ4_streamHC_t*)cctx->lz4CtxPtr, sizeof(LZ4_streamHC_t));
+                LZ4_setCompressionLevel((LZ4_streamHC_t*)cctx->lz4CtxPtr, cctx->prefs.compressionLevel);
             }
-            cctxPtr->lz4CtxState = ctxTypeID;
+            cctx->lz4CtxType = ctxTypeID;
     }   }
 
     /* Buffer Management */
-    if (cctxPtr->prefs.frameInfo.blockSizeID == 0)
-        cctxPtr->prefs.frameInfo.blockSizeID = LZ4F_BLOCKSIZEID_DEFAULT;
-    cctxPtr->maxBlockSize = LZ4F_getBlockSize(cctxPtr->prefs.frameInfo.blockSizeID);
+    if (cctx->prefs.frameInfo.blockSizeID == 0)
+        cctx->prefs.frameInfo.blockSizeID = LZ4F_BLOCKSIZEID_DEFAULT;
+    cctx->maxBlockSize = LZ4F_getBlockSize(cctx->prefs.frameInfo.blockSizeID);
 
     {   size_t const requiredBuffSize = preferencesPtr->autoFlush ?
-                ((cctxPtr->prefs.frameInfo.blockMode == LZ4F_blockLinked) ? 64 KB : 0) :  /* only needs past data up to window size */
-                cctxPtr->maxBlockSize + ((cctxPtr->prefs.frameInfo.blockMode == LZ4F_blockLinked) ? 128 KB : 0);
-
-        if (cctxPtr->maxBufferSize < requiredBuffSize) {
-            cctxPtr->maxBufferSize = 0;
-            LZ4F_free(cctxPtr->tmpBuff, cctxPtr->cmem);
-            cctxPtr->tmpBuff = (BYTE*)LZ4F_calloc(requiredBuffSize, cctxPtr->cmem);
-            RETURN_ERROR_IF(cctxPtr->tmpBuff == NULL, allocation_failed);
-            cctxPtr->maxBufferSize = requiredBuffSize;
+                ((cctx->prefs.frameInfo.blockMode == LZ4F_blockLinked) ? 64 KB : 0) :  /* only needs past data up to window size */
+                cctx->maxBlockSize + ((cctx->prefs.frameInfo.blockMode == LZ4F_blockLinked) ? 128 KB : 0);
+
+        if (cctx->maxBufferSize < requiredBuffSize) {
+            cctx->maxBufferSize = 0;
+            LZ4F_free(cctx->tmpBuff, cctx->cmem);
+            cctx->tmpBuff = (BYTE*)LZ4F_malloc(requiredBuffSize, cctx->cmem);
+            RETURN_ERROR_IF(cctx->tmpBuff == NULL, allocation_failed);
+            cctx->maxBufferSize = requiredBuffSize;
     }   }
-    cctxPtr->tmpIn = cctxPtr->tmpBuff;
-    cctxPtr->tmpInSize = 0;
-    (void)XXH32_reset(&(cctxPtr->xxh), 0);
+    cctx->tmpIn = cctx->tmpBuff;
+    cctx->tmpInSize = 0;
+    (void)XXH32_reset(&(cctx->xxh), 0);
 
     /* context init */
-    cctxPtr->cdict = cdict;
-    if (cctxPtr->prefs.frameInfo.blockMode == LZ4F_blockLinked) {
+    cctx->cdict = cdict;
+    if (cctx->prefs.frameInfo.blockMode == LZ4F_blockLinked) {
         /* frame init only for blockLinked : blockIndependent will be init at each block */
-        LZ4F_initStream(cctxPtr->lz4CtxPtr, cdict, cctxPtr->prefs.compressionLevel, LZ4F_blockLinked);
+        LZ4F_initStream(cctx->lz4CtxPtr, cdict, cctx->prefs.compressionLevel, LZ4F_blockLinked);
     }
     if (preferencesPtr->compressionLevel >= LZ4HC_CLEVEL_MIN) {
-        LZ4_favorDecompressionSpeed((LZ4_streamHC_t*)cctxPtr->lz4CtxPtr, (int)preferencesPtr->favorDecSpeed);
+        LZ4_favorDecompressionSpeed((LZ4_streamHC_t*)cctx->lz4CtxPtr, (int)preferencesPtr->favorDecSpeed);
+    }
+    if (dictBuffer) {
+        assert(cdict == NULL);
+        RETURN_ERROR_IF(dictSize > INT_MAX, parameter_invalid);
+        if (cctx->lz4CtxType == ctxFast) {
+            /* lz4 fast*/
+            LZ4_loadDict((LZ4_stream_t*)cctx->lz4CtxPtr, (const char*)dictBuffer, (int)dictSize);
+        } else {
+            /* lz4hc */
+            assert(cctx->lz4CtxType == ctxHC);
+            LZ4_loadDictHC((LZ4_streamHC_t*)cctx->lz4CtxPtr, (const char*)dictBuffer, (int)dictSize);
+        }
     }
 
+    /* Stage 2 : Write Frame Header */
+
     /* Magic Number */
     LZ4F_writeLE32(dstPtr, LZ4F_MAGICNUMBER);
     dstPtr += 4;
@@ -757,22 +785,22 @@ size_t LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctxPtr,
 
         /* FLG Byte */
         *dstPtr++ = (BYTE)(((1 & _2BITS) << 6)    /* Version('01') */
-            + ((cctxPtr->prefs.frameInfo.blockMode & _1BIT ) << 5)
-            + ((cctxPtr->prefs.frameInfo.blockChecksumFlag & _1BIT ) << 4)
-            + ((unsigned)(cctxPtr->prefs.frameInfo.contentSize > 0) << 3)
-            + ((cctxPtr->prefs.frameInfo.contentChecksumFlag & _1BIT ) << 2)
-            +  (cctxPtr->prefs.frameInfo.dictID > 0) );
+            + ((cctx->prefs.frameInfo.blockMode & _1BIT ) << 5)
+            + ((cctx->prefs.frameInfo.blockChecksumFlag & _1BIT ) << 4)
+            + ((unsigned)(cctx->prefs.frameInfo.contentSize > 0) << 3)
+            + ((cctx->prefs.frameInfo.contentChecksumFlag & _1BIT ) << 2)
+            +  (cctx->prefs.frameInfo.dictID > 0) );
         /* BD Byte */
-        *dstPtr++ = (BYTE)((cctxPtr->prefs.frameInfo.blockSizeID & _3BITS) << 4);
+        *dstPtr++ = (BYTE)((cctx->prefs.frameInfo.blockSizeID & _3BITS) << 4);
         /* Optional Frame content size field */
-        if (cctxPtr->prefs.frameInfo.contentSize) {
-            LZ4F_writeLE64(dstPtr, cctxPtr->prefs.frameInfo.contentSize);
+        if (cctx->prefs.frameInfo.contentSize) {
+            LZ4F_writeLE64(dstPtr, cctx->prefs.frameInfo.contentSize);
             dstPtr += 8;
-            cctxPtr->totalInSize = 0;
+            cctx->totalInSize = 0;
         }
         /* Optional dictionary ID field */
-        if (cctxPtr->prefs.frameInfo.dictID) {
-            LZ4F_writeLE32(dstPtr, cctxPtr->prefs.frameInfo.dictID);
+        if (cctx->prefs.frameInfo.dictID) {
+            LZ4F_writeLE32(dstPtr, cctx->prefs.frameInfo.dictID);
             dstPtr += 4;
         }
         /* Header CRC Byte */
@@ -780,24 +808,54 @@ size_t LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctxPtr,
         dstPtr++;
     }
 
-    cctxPtr->cStage = 1;   /* header written, now request input data block */
+    cctx->cStage = 1;   /* header written, now request input data block */
     return (size_t)(dstPtr - dstStart);
 }
 
+size_t LZ4F_compressBegin(LZ4F_cctx* cctx,
+                          void* dstBuffer, size_t dstCapacity,
+                          const LZ4F_preferences_t* preferencesPtr)
+{
+    return LZ4F_compressBegin_internal(cctx, dstBuffer, dstCapacity,
+                                        NULL, 0,
+                                        NULL, preferencesPtr);
+}
 
-/*! LZ4F_compressBegin() :
- *  init streaming compression AND writes frame header into @dstBuffer.
- * @dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
- * @preferencesPtr can be NULL, in which case default parameters are selected.
- * @return : number of bytes written into dstBuffer for the header
- *        or an error code (can be tested using LZ4F_isError())
- */
-size_t LZ4F_compressBegin(LZ4F_cctx* cctxPtr,
+/* LZ4F_compressBegin_usingDictOnce:
+ * Hidden implementation,
+ * employed for multi-threaded compression
+ * when frame defines linked blocks */
+size_t LZ4F_compressBegin_usingDictOnce(LZ4F_cctx* cctx,
+                          void* dstBuffer, size_t dstCapacity,
+                          const void* dict, size_t dictSize,
+                          const LZ4F_preferences_t* preferencesPtr)
+{
+    return LZ4F_compressBegin_internal(cctx, dstBuffer, dstCapacity,
+                                        dict, dictSize,
+                                        NULL, preferencesPtr);
+}
+
+size_t LZ4F_compressBegin_usingDict(LZ4F_cctx* cctx,
+                          void* dstBuffer, size_t dstCapacity,
+                          const void* dict, size_t dictSize,
+                          const LZ4F_preferences_t* preferencesPtr)
+{
+    /* note : incorrect implementation :
+     * this will only use the dictionary once,
+     * instead of once *per* block when frames defines independent blocks */
+    return LZ4F_compressBegin_usingDictOnce(cctx, dstBuffer, dstCapacity,
+                                        dict, dictSize,
+                                        preferencesPtr);
+}
+
+size_t LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctx,
                           void* dstBuffer, size_t dstCapacity,
+                          const LZ4F_CDict* cdict,
                           const LZ4F_preferences_t* preferencesPtr)
 {
-    return LZ4F_compressBegin_usingCDict(cctxPtr, dstBuffer, dstCapacity,
-                                         NULL, preferencesPtr);
+    return LZ4F_compressBegin_internal(cctx, dstBuffer, dstCapacity,
+                                        NULL, 0,
+                                       cdict, preferencesPtr);
 }
 
 
@@ -891,9 +949,10 @@ static int LZ4F_doNotCompressBlock(void* ctx, const char* src, char* dst, int sr
     return 0;
 }
 
-static compressFunc_t LZ4F_selectCompression(LZ4F_blockMode_t blockMode, int level, LZ4F_blockCompression_t  compressMode)
+static compressFunc_t LZ4F_selectCompression(LZ4F_blockMode_t blockMode, int level, LZ4F_BlockCompressMode_e  compressMode)
 {
-    if (compressMode == LZ4B_UNCOMPRESSED) return LZ4F_doNotCompressBlock;
+    if (compressMode == LZ4B_UNCOMPRESSED)
+        return LZ4F_doNotCompressBlock;
     if (level < LZ4HC_CLEVEL_MIN) {
         if (blockMode == LZ4F_blockIndependent) return LZ4F_compressBlock;
         return LZ4F_compressBlock_continue;
@@ -931,7 +990,7 @@ static size_t LZ4F_compressUpdateImpl(LZ4F_cctx* cctxPtr,
                      void* dstBuffer, size_t dstCapacity,
                      const void* srcBuffer, size_t srcSize,
                      const LZ4F_compressOptions_t* compressOptionsPtr,
-                     LZ4F_blockCompression_t blockCompression)
+                     LZ4F_BlockCompressMode_e blockCompression)
   {
     size_t const blockSize = cctxPtr->maxBlockSize;
     const BYTE* srcPtr = (const BYTE*)srcBuffer;
@@ -951,10 +1010,10 @@ static size_t LZ4F_compressUpdateImpl(LZ4F_cctx* cctxPtr,
         RETURN_ERROR(dstMaxSize_tooSmall);
 
     /* flush currently written block, to continue with new block compression */
-    if (cctxPtr->blockCompression != blockCompression) {
+    if (cctxPtr->blockCompressMode != blockCompression) {
         bytesWritten = LZ4F_flush(cctxPtr, dstBuffer, dstCapacity, compressOptionsPtr);
         dstPtr += bytesWritten;
-        cctxPtr->blockCompression = blockCompression;
+        cctxPtr->blockCompressMode = blockCompression;
     }
 
     if (compressOptionsPtr == NULL) compressOptionsPtr = &k_cOptionsNull;
@@ -1068,13 +1127,9 @@ size_t LZ4F_compressUpdate(LZ4F_cctx* cctxPtr,
                                    compressOptionsPtr, LZ4B_COMPRESSED);
 }
 
-/*! LZ4F_compressUpdate() :
- *  LZ4F_compressUpdate() can be called repetitively to compress as much data as necessary.
- *  When successful, the function always entirely consumes @srcBuffer.
- *  src data is either buffered or compressed into @dstBuffer.
- *  If previously an uncompressed block was written, buffered data is flushed
- *  before appending compressed data is continued.
- *  This is only supported when LZ4F_blockIndependent is used
+/*! LZ4F_uncompressedUpdate() :
+ *  Same as LZ4F_compressUpdate(), but requests blocks to be sent uncompressed.
+ *  This symbol is only supported when LZ4F_blockIndependent is used
  * @dstCapacity MUST be >= LZ4F_compressBound(srcSize, preferencesPtr).
  * @compressOptionsPtr is optional : provide NULL to mean "default".
  * @return : the number of bytes written into dstBuffer. It can be zero, meaning input data was just buffered.
@@ -1084,8 +1139,8 @@ size_t LZ4F_compressUpdate(LZ4F_cctx* cctxPtr,
 size_t LZ4F_uncompressedUpdate(LZ4F_cctx* cctxPtr,
                                void* dstBuffer, size_t dstCapacity,
                          const void* srcBuffer, size_t srcSize,
-                         const LZ4F_compressOptions_t* compressOptionsPtr) {
-    RETURN_ERROR_IF(cctxPtr->prefs.frameInfo.blockMode != LZ4F_blockIndependent, blockMode_invalid);
+                         const LZ4F_compressOptions_t* compressOptionsPtr)
+{
     return LZ4F_compressUpdateImpl(cctxPtr,
                                    dstBuffer, dstCapacity,
                                    srcBuffer, srcSize,
@@ -1115,7 +1170,7 @@ size_t LZ4F_flush(LZ4F_cctx* cctxPtr,
     (void)compressOptionsPtr;   /* not useful (yet) */
 
     /* select compression function */
-    compress = LZ4F_selectCompression(cctxPtr->prefs.frameInfo.blockMode, cctxPtr->prefs.compressionLevel, cctxPtr->blockCompression);
+    compress = LZ4F_selectCompression(cctxPtr->prefs.frameInfo.blockMode, cctxPtr->prefs.compressionLevel, cctxPtr->blockCompressMode);
 
     /* compress tmp buffer */
     dstPtr += LZ4F_makeBlock(dstPtr,
@@ -1170,13 +1225,12 @@ size_t LZ4F_compressEnd(LZ4F_cctx* cctxPtr,
     if (cctxPtr->prefs.frameInfo.contentChecksumFlag == LZ4F_contentChecksumEnabled) {
         U32 const xxh = XXH32_digest(&(cctxPtr->xxh));
         RETURN_ERROR_IF(dstCapacity < 8, dstMaxSize_tooSmall);
-        DEBUGLOG(5,"Writing 32-bit content checksum");
+        DEBUGLOG(5,"Writing 32-bit content checksum (0x%0X)", xxh);
         LZ4F_writeLE32(dstPtr, xxh);
         dstPtr+=4;   /* content Checksum */
     }
 
     cctxPtr->cStage = 0;   /* state is now re-usable (with identical preferences) */
-    cctxPtr->maxBufferSize = 0;  /* reuse HC context */
 
     if (cctxPtr->prefs.frameInfo.contentSize) {
         if (cctxPtr->prefs.frameInfo.contentSize != cctxPtr->totalInSize)
@@ -1270,13 +1324,14 @@ LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_dctx* dctx)
 
 
 /*==---   Streaming Decompression operations   ---==*/
-
 void LZ4F_resetDecompressionContext(LZ4F_dctx* dctx)
 {
+    DEBUGLOG(5, "LZ4F_resetDecompressionContext");
     dctx->dStage = dstage_getFrameHeader;
     dctx->dict = NULL;
     dctx->dictSize = 0;
     dctx->skipChecksum = 0;
+    dctx->frameRemainingSize = 0;
 }
 
 
@@ -1333,6 +1388,7 @@ static size_t LZ4F_decodeHeader(LZ4F_dctx* dctx, const void* src, size_t srcSize
         if (((FLG>>1)&_1BIT) != 0) RETURN_ERROR(reservedFlag_set); /* Reserved bit */
         if (version != 1) RETURN_ERROR(headerVersion_wrong);       /* Version Number, only supported value */
     }
+    DEBUGLOG(6, "contentSizeFlag: %u", contentSizeFlag);
 
     /* Frame Header Size */
     frameHeaderSize = minFHSize + (contentSizeFlag?8:0) + (dictIDFlag?4:0);
@@ -1369,8 +1425,9 @@ static size_t LZ4F_decodeHeader(LZ4F_dctx* dctx, const void* src, size_t srcSize
     dctx->frameInfo.contentChecksumFlag = (LZ4F_contentChecksum_t)contentChecksumFlag;
     dctx->frameInfo.blockSizeID = (LZ4F_blockSizeID_t)blockSizeID;
     dctx->maxBlockSize = LZ4F_getBlockSize((LZ4F_blockSizeID_t)blockSizeID);
-    if (contentSizeFlag)
+    if (contentSizeFlag) {
         dctx->frameRemainingSize = dctx->frameInfo.contentSize = LZ4F_readLE64(srcPtr+6);
+    }
     if (dictIDFlag)
         dctx->frameInfo.dictID = LZ4F_readLE32(srcPtr + frameHeaderSize - 5);
 
@@ -1570,7 +1627,7 @@ size_t LZ4F_decompress(LZ4F_dctx* dctx,
     size_t nextSrcSizeHint = 1;
 
 
-    DEBUGLOG(5, "LZ4F_decompress : %p,%u => %p,%u",
+    DEBUGLOG(5, "LZ4F_decompress: src[%p](%u) => dst[%p](%u)",
             srcBuffer, (unsigned)*srcSizePtr, dstBuffer, (unsigned)*dstSizePtr);
     if (dstBuffer == NULL) assert(*dstSizePtr == 0);
     MEM_INIT(&optionsNull, 0, sizeof(optionsNull));
@@ -1722,10 +1779,10 @@ size_t LZ4F_decompress(LZ4F_dctx* dctx,
                     /* history management (linked blocks only)*/
                     if (dctx->frameInfo.blockMode == LZ4F_blockLinked) {
                         LZ4F_updateDict(dctx, dstPtr, sizeToCopy, dstStart, 0);
-                }   }
-
-                srcPtr += sizeToCopy;
-                dstPtr += sizeToCopy;
+                    }
+                    srcPtr += sizeToCopy;
+                    dstPtr += sizeToCopy;
+                }
                 if (sizeToCopy == dctx->tmpInTarget) {   /* all done */
                     if (dctx->frameInfo.blockChecksumFlag) {
                         dctx->tmpInSize = 0;
@@ -1959,6 +2016,7 @@ size_t LZ4F_decompress(LZ4F_dctx* dctx,
             if (!dctx->skipChecksum) {
                 U32 const readCRC = LZ4F_readLE32(selectedIn);
                 U32 const resultCRC = XXH32_digest(&(dctx->xxh));
+                DEBUGLOG(4, "frame checksum: stored 0x%0X vs 0x%0X processed", readCRC, resultCRC);
 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
                 RETURN_ERROR_IF(readCRC != resultCRC, contentChecksum_invalid);
 #else

lz4.mod/lz4/lib/lz4frame.h

@@ -173,16 +173,16 @@ typedef LZ4F_contentChecksum_t contentChecksum_t;
  *  setting all parameters to default.
  *  It's then possible to update selectively some parameters */
 typedef struct {
-  LZ4F_blockSizeID_t     blockSizeID;         /* max64KB, max256KB, max1MB, max4MB; 0 == default */
-  LZ4F_blockMode_t       blockMode;           /* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default */
-  LZ4F_contentChecksum_t contentChecksumFlag; /* 1: frame terminated with 32-bit checksum of decompressed data; 0: disabled (default) */
+  LZ4F_blockSizeID_t     blockSizeID;         /* max64KB, max256KB, max1MB, max4MB; 0 == default (LZ4F_max64KB) */
+  LZ4F_blockMode_t       blockMode;           /* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default (LZ4F_blockLinked) */
+  LZ4F_contentChecksum_t contentChecksumFlag; /* 1: add a 32-bit checksum of frame's decompressed data; 0 == default (disabled) */
   LZ4F_frameType_t       frameType;           /* read-only field : LZ4F_frame or LZ4F_skippableFrame */
   unsigned long long     contentSize;         /* Size of uncompressed content ; 0 == unknown */
   unsigned               dictID;              /* Dictionary ID, sent by compressor to help decoder select correct dictionary; 0 == no dictID provided */
-  LZ4F_blockChecksum_t   blockChecksumFlag;   /* 1: each block followed by a checksum of block's compressed data; 0: disabled (default) */
+  LZ4F_blockChecksum_t   blockChecksumFlag;   /* 1: each block followed by a checksum of block's compressed data; 0 == default (disabled) */
 } LZ4F_frameInfo_t;
 
-#define LZ4F_INIT_FRAMEINFO   { LZ4F_default, LZ4F_blockLinked, LZ4F_noContentChecksum, LZ4F_frame, 0ULL, 0U, LZ4F_noBlockChecksum }    /* v1.8.3+ */
+#define LZ4F_INIT_FRAMEINFO   { LZ4F_max64KB, LZ4F_blockLinked, LZ4F_noContentChecksum, LZ4F_frame, 0ULL, 0U, LZ4F_noBlockChecksum }    /* v1.8.3+ */
 
 /*! LZ4F_preferences_t :
  *  makes it possible to supply advanced compression instructions to streaming interface.
@@ -204,7 +204,26 @@ typedef struct {
 *  Simple compression function
 ***********************************/
 
-LZ4FLIB_API int LZ4F_compressionLevel_max(void);   /* v1.8.0+ */
+/*! LZ4F_compressFrame() :
+ *  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())
+ */
+LZ4FLIB_API size_t LZ4F_compressFrame(void* dstBuffer, size_t dstCapacity,
+                                const void* srcBuffer, size_t srcSize,
+                                const LZ4F_preferences_t* preferencesPtr);
 
 /*! LZ4F_compressFrameBound() :
  *  Returns the maximum possible compressed size with LZ4F_compressFrame() given srcSize and preferences.
@@ -214,16 +233,11 @@ LZ4FLIB_API int LZ4F_compressionLevel_max(void);   /* v1.8.0+ */
  */
 LZ4FLIB_API size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr);
 
-/*! LZ4F_compressFrame() :
- *  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())
+
+/*! LZ4F_compressionLevel_max() :
+ * @return maximum allowed compression level (currently: 12)
  */
-LZ4FLIB_API size_t LZ4F_compressFrame(void* dstBuffer, size_t dstCapacity,
-                                const void* srcBuffer, size_t srcSize,
-                                const LZ4F_preferences_t* preferencesPtr);
+LZ4FLIB_API int LZ4F_compressionLevel_max(void);   /* v1.8.0+ */
 
 
 /*-***********************************
@@ -278,7 +292,7 @@ LZ4FLIB_API LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
 /*! LZ4F_compressBegin() :
  *  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())
  */
@@ -355,8 +369,9 @@ typedef struct LZ4F_dctx_s LZ4F_dctx;   /* incomplete type */
 typedef LZ4F_dctx* LZ4F_decompressionContext_t;   /* compatibility with previous API versions */
 
 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;     /* must be set to zero for forward compatibility */
@@ -463,6 +478,11 @@ LZ4F_getFrameInfo(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.
@@ -493,6 +513,109 @@ LZ4F_decompress(LZ4F_dctx* dctx,
 LZ4FLIB_API void LZ4F_resetDecompressionContext(LZ4F_dctx* dctx);   /* always successful */
 
 
+/**********************************
+ *  Dictionary compression API
+ *********************************/
+
+/* A Dictionary is useful for the compression of small messages (KB range).
+ * It dramatically improves compression efficiency.
+ *
+ * LZ4 can ingest any input as dictionary, though only the last 64 KB are useful.
+ * Better results are generally achieved by using Zstandard's Dictionary Builder
+ * to generate a high-quality dictionary from a set of samples.
+ *
+ * The same dictionary will have to be used on the decompression side
+ * for decoding to be successful.
+ * To help identify the correct dictionary at decoding stage,
+ * the frame header allows optional embedding of a dictID field.
+ */
+
+/*! LZ4F_compressBegin_usingDict() : stable since v1.10
+ *  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.
+ */
+LZ4FLIB_API size_t
+LZ4F_compressBegin_usingDict(LZ4F_cctx* cctx,
+                            void* dstBuffer, size_t dstCapacity,
+                      const void* dictBuffer, size_t dictSize,
+                      const LZ4F_preferences_t* prefsPtr);
+
+/*! LZ4F_decompress_usingDict() : stable since v1.10
+ *  Same as LZ4F_decompress(), using a predefined dictionary.
+ *  Dictionary is used "in place", without any preprocessing.
+**  It must remain accessible throughout the entire frame decoding. */
+LZ4FLIB_API size_t
+LZ4F_decompress_usingDict(LZ4F_dctx* dctxPtr,
+                          void* dstBuffer, size_t* dstSizePtr,
+                    const void* srcBuffer, size_t* srcSizePtr,
+                    const void* dict, size_t dictSize,
+                    const LZ4F_decompressOptions_t* decompressOptionsPtr);
+
+/*****************************************
+ *  Bulk processing dictionary compression
+ *****************************************/
+
+/* Loading a dictionary has a cost, since it involves construction of tables.
+ * The Bulk processing dictionary API makes it possible to share this cost
+ * over an arbitrary number of compression jobs, even concurrently,
+ * markedly improving compression latency for these cases.
+ *
+ * Note that there is no corresponding bulk API for the decompression side,
+ * because dictionary does not carry any initialization cost for decompression.
+ * Use the regular LZ4F_decompress_usingDict() there.
+ */
+typedef struct LZ4F_CDict_s LZ4F_CDict;
+
+/*! LZ4_createCDict() : stable since v1.10
+ *  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. */
+LZ4FLIB_API LZ4F_CDict* LZ4F_createCDict(const void* dictBuffer, size_t dictSize);
+LZ4FLIB_API void        LZ4F_freeCDict(LZ4F_CDict* CDict);
+
+/*! LZ4_compressFrame_usingCDict() : stable since v1.10
+ *  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. */
+LZ4FLIB_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);
+
+/*! LZ4F_compressBegin_usingCDict() : stable since v1.10
+ *  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(). */
+LZ4FLIB_API size_t
+LZ4F_compressBegin_usingCDict(LZ4F_cctx* cctx,
+                              void* dstBuffer, size_t dstCapacity,
+                        const LZ4F_CDict* cdict,
+                        const LZ4F_preferences_t* prefsPtr);
+
 
 #if defined (__cplusplus)
 }
@@ -503,11 +626,8 @@ LZ4FLIB_API void LZ4F_resetDecompressionContext(LZ4F_dctx* dctx);   /* always su
 #if defined(LZ4F_STATIC_LINKING_ONLY) && !defined(LZ4F_H_STATIC_09782039843)
 #define LZ4F_H_STATIC_09782039843
 
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-/* These declarations are not stable and may change in the future.
+/* Note :
+ * The below declarations are not stable and may change in the future.
  * They are therefore only safe to depend on
  * when the caller is statically linked against the library.
  * To access their declarations, define LZ4F_STATIC_LINKING_ONLY.
@@ -517,6 +637,11 @@ extern "C" {
  * by defining LZ4F_PUBLISH_STATIC_FUNCTIONS.
  * Use at your own risk.
  */
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
 #ifdef LZ4F_PUBLISH_STATIC_FUNCTIONS
 # define LZ4FLIB_STATIC_API LZ4FLIB_API
 #else
@@ -530,7 +655,7 @@ extern "C" {
         ITEM(ERROR_GENERIC) \
         ITEM(ERROR_maxBlockSize_invalid) \
         ITEM(ERROR_blockMode_invalid) \
-        ITEM(ERROR_contentChecksumFlag_invalid) \
+        ITEM(ERROR_parameter_invalid) \
         ITEM(ERROR_compressionLevel_invalid) \
         ITEM(ERROR_headerVersion_wrong) \
         ITEM(ERROR_blockChecksum_invalid) \
@@ -548,6 +673,8 @@ extern "C" {
         ITEM(ERROR_frameDecoding_alreadyStarted) \
         ITEM(ERROR_compressionState_uninitialized) \
         ITEM(ERROR_parameter_null) \
+        ITEM(ERROR_io_write) \
+        ITEM(ERROR_io_read) \
         ITEM(ERROR_maxCode)
 
 #define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM,
@@ -558,22 +685,26 @@ typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM)
 
 LZ4FLIB_STATIC_API LZ4F_errorCodes LZ4F_getErrorCode(size_t functionResult);
 
+/**********************************
+ *  Advanced compression operations
+ *********************************/
 
 /*! LZ4F_getBlockSize() :
- *  Return, in scalar format (size_t),
- *  the maximum block size associated with blockSizeID.
+ * @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.
 **/
 LZ4FLIB_STATIC_API size_t LZ4F_getBlockSize(LZ4F_blockSizeID_t blockSizeID);
 
 /*! LZ4F_uncompressedUpdate() :
- *  LZ4F_uncompressedUpdate() can be called repetitively to add as much data uncompressed data as necessary.
+ *  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
+ *  If previously a compressed block was written, buffered data is flushed first,
  *  before appending uncompressed data is continued.
- *  This is only supported when LZ4F_blockIndependent is used
+ *  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())
@@ -585,82 +716,10 @@ LZ4F_uncompressedUpdate(LZ4F_cctx* cctx,
                   const LZ4F_compressOptions_t* cOptPtr);
 
 /**********************************
- *  Bulk processing dictionary API
+ *  Custom memory allocation
  *********************************/
 
-/* A Dictionary is useful for the compression of small messages (KB range).
- * It dramatically improves compression efficiency.
- *
- * LZ4 can ingest any input as dictionary, though only the last 64 KB are useful.
- * Best results are generally achieved by using Zstandard's Dictionary Builder
- * to generate a high-quality dictionary from a set of samples.
- *
- * Loading a dictionary has a cost, since it involves construction of tables.
- * The Bulk processing dictionary API makes it possible to share this cost
- * over an arbitrary number of compression jobs, even concurrently,
- * markedly improving compression latency for these cases.
- *
- * The same dictionary will have to be used on the decompression side
- * for decoding to be successful.
- * To help identify the correct dictionary at decoding stage,
- * the frame header allows optional embedding of a dictID field.
- */
-typedef struct LZ4F_CDict_s LZ4F_CDict;
-
-/*! LZ4_createCDict() :
- *  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 */
-LZ4FLIB_STATIC_API LZ4F_CDict* LZ4F_createCDict(const void* dictBuffer, size_t dictSize);
-LZ4FLIB_STATIC_API void        LZ4F_freeCDict(LZ4F_CDict* CDict);
-
-
-/*! LZ4_compressFrame_usingCDict() :
- *  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()) */
-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);
-
-
-/*! LZ4F_compressBegin_usingCDict() :
- *  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()) */
-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);
-
-
-/*! LZ4F_decompress_usingDict() :
- *  Same as LZ4F_decompress(), using a predefined dictionary.
- *  Dictionary is used "in place", without any preprocessing.
-**  It must remain accessible throughout the entire frame decoding. */
-LZ4FLIB_STATIC_API size_t
-LZ4F_decompress_usingDict(LZ4F_dctx* dctxPtr,
-                          void* dstBuffer, size_t* dstSizePtr,
-                    const void* srcBuffer, size_t* srcSizePtr,
-                    const void* dict, size_t dictSize,
-                    const LZ4F_decompressOptions_t* decompressOptionsPtr);
-
-
-/*! Custom memory allocation :
+/*! Custom memory allocation : v1.9.4+
  *  These prototypes make it possible to pass custom allocation/free functions.
  *  LZ4F_customMem is provided at state creation time, using LZ4F_create*_advanced() listed below.
  *  All allocation/free operations will be completed using these custom variants instead of regular <stdlib.h> ones.

lz4.mod/lz4/lib/lz4hc.h

@@ -44,7 +44,7 @@ extern "C" {
 
 
 /* --- Useful constants --- */
-#define LZ4HC_CLEVEL_MIN         3
+#define LZ4HC_CLEVEL_MIN         2
 #define LZ4HC_CLEVEL_DEFAULT     9
 #define LZ4HC_CLEVEL_OPT_MIN    10
 #define LZ4HC_CLEVEL_MAX        12
@@ -126,6 +126,8 @@ LZ4LIB_API int             LZ4_freeStreamHC (LZ4_streamHC_t* streamHCPtr);
 
   After reset, a first "fictional block" can be designated as initial dictionary,
   using LZ4_loadDictHC() (Optional).
+  Note: In order for LZ4_loadDictHC() to create the correct data structure,
+  it is essential to set the compression level _before_ loading the dictionary.
 
   Invoke LZ4_compress_HC_continue() to compress each successive block.
   The number of blocks is unlimited.
@@ -135,12 +137,12 @@ LZ4LIB_API int             LZ4_freeStreamHC (LZ4_streamHC_t* streamHCPtr);
   It's allowed to update compression level anytime between blocks,
   using LZ4_setCompressionLevel() (experimental).
 
-  'dst' buffer should be sized to handle worst case scenarios
+ @dst buffer should be sized to handle worst case scenarios
   (see LZ4_compressBound(), it ensures compression success).
   In case of failure, the API does not guarantee recovery,
   so the state _must_ be reset.
   To ensure compression success
-  whenever `dst` buffer size cannot be made >= LZ4_compressBound(),
+  whenever @dst buffer size cannot be made >= LZ4_compressBound(),
   consider using LZ4_compress_HC_continue_destSize().
 
   Whenever previous input blocks can't be preserved unmodified in-place during compression of next blocks,
@@ -176,6 +178,34 @@ LZ4LIB_API int LZ4_compress_HC_continue_destSize(LZ4_streamHC_t* LZ4_streamHCPtr
 LZ4LIB_API int LZ4_saveDictHC (LZ4_streamHC_t* streamHCPtr, char* safeBuffer, int maxDictSize);
 
 
+/*! LZ4_attach_HC_dictionary() : stable since v1.10.0
+ *  This API allows for the efficient re-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_streamHC_t into a
+ *  working LZ4_streamHC_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_loadDictHC() should
+ *  be expected to work.
+ *
+ *  Alternatively, the provided dictionary stream pointer may be NULL, in which
+ *  case any existing dictionary stream is unset.
+ *
+ *  A dictionary should only be attached to a stream without any history (i.e.,
+ *  a stream that has just been reset).
+ *
+ *  The dictionary will remain attached to the working stream only for the
+ *  current stream session. Calls to LZ4_resetStreamHC(_fast) will remove the
+ *  dictionary context association from the working stream. The dictionary
+ *  stream (and source buffer) must remain in-place / accessible / unchanged
+ *  through the lifetime of the stream session.
+ */
+LZ4LIB_API void
+LZ4_attach_HC_dictionary(LZ4_streamHC_t* working_stream,
+                   const LZ4_streamHC_t* dictionary_stream);
+
 
 /*^**********************************************
  * !!!!!!   STATIC LINKING ONLY   !!!!!!
@@ -204,18 +234,18 @@ LZ4LIB_API int LZ4_saveDictHC (LZ4_streamHC_t* streamHCPtr, char* safeBuffer, in
 typedef struct LZ4HC_CCtx_internal LZ4HC_CCtx_internal;
 struct LZ4HC_CCtx_internal
 {
-    LZ4_u32   hashTable[LZ4HC_HASHTABLESIZE];
-    LZ4_u16   chainTable[LZ4HC_MAXD];
-    const LZ4_byte* end;       /* next block here to continue on current prefix */
+    LZ4_u32 hashTable[LZ4HC_HASHTABLESIZE];
+    LZ4_u16 chainTable[LZ4HC_MAXD];
+    const LZ4_byte* end;     /* next block here to continue on current prefix */
     const LZ4_byte* prefixStart;  /* Indexes relative to this position */
     const LZ4_byte* dictStart; /* alternate reference for extDict */
-    LZ4_u32   dictLimit;       /* below that point, need extDict */
-    LZ4_u32   lowLimit;        /* below that point, no more dict */
-    LZ4_u32   nextToUpdate;    /* index from which to continue dictionary update */
-    short     compressionLevel;
-    LZ4_i8    favorDecSpeed;   /* favor decompression speed if this flag set,
-                                  otherwise, favor compression ratio */
-    LZ4_i8    dirty;           /* stream has to be fully reset if this flag is set */
+    LZ4_u32 dictLimit;       /* below that point, need extDict */
+    LZ4_u32 lowLimit;        /* below that point, no more history */
+    LZ4_u32 nextToUpdate;    /* index from which to continue dictionary update */
+    short   compressionLevel;
+    LZ4_i8  favorDecSpeed;   /* favor decompression speed if this flag set,
+                                otherwise, favor compression ratio */
+    LZ4_i8  dirty;           /* stream has to be fully reset if this flag is set */
     const LZ4HC_CCtx_internal* dictCtx;
 };
 
@@ -376,35 +406,6 @@ LZ4LIB_STATIC_API int LZ4_compress_HC_extStateHC_fastReset (
     int srcSize, int dstCapacity,
     int compressionLevel);
 
-/*! LZ4_attach_HC_dictionary() :
- *  This is an experimental API that allows for the 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_streamHC_t into a
- *  working LZ4_streamHC_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_loadDictHC() should
- *  be expected to work.
- *
- *  Alternatively, the provided dictionary stream pointer may be NULL, in which
- *  case any existing dictionary stream is unset.
- *
- *  A dictionary should only be attached to a stream without any history (i.e.,
- *  a stream that has just been reset).
- *
- *  The dictionary will remain attached to the working stream only for the
- *  current stream session. Calls to LZ4_resetStreamHC(_fast) will remove the
- *  dictionary context association from the working stream. The dictionary
- *  stream (and source buffer) must remain in-place / accessible / unchanged
- *  through the lifetime of the stream session.
- */
-LZ4LIB_STATIC_API void LZ4_attach_HC_dictionary(
-          LZ4_streamHC_t *working_stream,
-    const LZ4_streamHC_t *dictionary_stream);
-
 #if defined (__cplusplus)
 }
 #endif

lz4.mod/lz4/lib/xxhash.c

@@ -120,12 +120,12 @@ static void* XXH_memcpy(void* dest, const void* src, size_t size) { return memcp
 /* *************************************
 *  Compiler Specific Options
 ***************************************/
-#ifdef _MSC_VER    /* Visual Studio */
+#if defined (_MSC_VER) && !defined (__clang__)    /* MSVC */
 #  pragma warning(disable : 4127)      /* disable: C4127: conditional expression is constant */
 #  define FORCE_INLINE static __forceinline
 #else
 #  if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   /* C99 */
-#    ifdef __GNUC__
+#    if defined (__GNUC__) || defined (__clang__)
 #      define FORCE_INLINE static inline __attribute__((always_inline))
 #    else
 #      define FORCE_INLINE static inline
@@ -213,7 +213,7 @@ static U32 XXH_swap32 (U32 x)
 /* *************************************
 *  Architecture Macros
 ***************************************/
-typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;
+typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianness;
 
 /* XXH_CPU_LITTLE_ENDIAN can be defined externally, for example on the compiler command line */
 #ifndef XXH_CPU_LITTLE_ENDIAN
@@ -231,7 +231,7 @@ static int XXH_isLittleEndian(void)
 *****************************/
 typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment;
 
-FORCE_INLINE U32 XXH_readLE32_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
+FORCE_INLINE U32 XXH_readLE32_align(const void* ptr, XXH_endianness endian, XXH_alignment align)
 {
     if (align==XXH_unaligned)
         return endian==XXH_littleEndian ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr));
@@ -239,7 +239,7 @@ FORCE_INLINE U32 XXH_readLE32_align(const void* ptr, XXH_endianess endian, XXH_a
         return endian==XXH_littleEndian ? *(const U32*)ptr : XXH_swap32(*(const U32*)ptr);
 }
 
-FORCE_INLINE U32 XXH_readLE32(const void* ptr, XXH_endianess endian)
+FORCE_INLINE U32 XXH_readLE32(const void* ptr, XXH_endianness endian)
 {
     return XXH_readLE32_align(ptr, endian, XXH_unaligned);
 }
@@ -289,7 +289,7 @@ static U32 XXH32_avalanche(U32 h32)
 
 static U32
 XXH32_finalize(U32 h32, const void* ptr, size_t len,
-                XXH_endianess endian, XXH_alignment align)
+                XXH_endianness endian, XXH_alignment align)
 
 {
     const BYTE* p = (const BYTE*)ptr;
@@ -350,7 +350,7 @@ XXH32_finalize(U32 h32, const void* ptr, size_t len,
 
 FORCE_INLINE U32
 XXH32_endian_align(const void* input, size_t len, U32 seed,
-                    XXH_endianess endian, XXH_alignment align)
+                    XXH_endianness endian, XXH_alignment align)
 {
     const BYTE* p = (const BYTE*)input;
     const BYTE* bEnd = p + len;
@@ -398,7 +398,7 @@ XXH_PUBLIC_API unsigned int XXH32 (const void* input, size_t len, unsigned int s
     XXH32_update(&state, input, len);
     return XXH32_digest(&state);
 #else
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if (XXH_FORCE_ALIGN_CHECK) {
         if ((((size_t)input) & 3) == 0) {   /* Input is 4-bytes aligned, leverage the speed benefit */
@@ -449,7 +449,7 @@ XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t* statePtr, unsigned int s
 
 
 FORCE_INLINE XXH_errorcode
-XXH32_update_endian(XXH32_state_t* state, const void* input, size_t len, XXH_endianess endian)
+XXH32_update_endian(XXH32_state_t* state, const void* input, size_t len, XXH_endianness endian)
 {
     if (input==NULL)
 #if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
@@ -514,7 +514,7 @@ XXH32_update_endian(XXH32_state_t* state, const void* input, size_t len, XXH_end
 
 XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void* input, size_t len)
 {
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
         return XXH32_update_endian(state_in, input, len, XXH_littleEndian);
@@ -524,7 +524,7 @@ XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void*
 
 
 FORCE_INLINE U32
-XXH32_digest_endian (const XXH32_state_t* state, XXH_endianess endian)
+XXH32_digest_endian (const XXH32_state_t* state, XXH_endianness endian)
 {
     U32 h32;
 
@@ -545,7 +545,7 @@ XXH32_digest_endian (const XXH32_state_t* state, XXH_endianess endian)
 
 XXH_PUBLIC_API unsigned int XXH32_digest (const XXH32_state_t* state_in)
 {
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
         return XXH32_digest_endian(state_in, XXH_littleEndian);
@@ -642,7 +642,7 @@ static U64 XXH_swap64 (U64 x)
 }
 #endif
 
-FORCE_INLINE U64 XXH_readLE64_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
+FORCE_INLINE U64 XXH_readLE64_align(const void* ptr, XXH_endianness endian, XXH_alignment align)
 {
     if (align==XXH_unaligned)
         return endian==XXH_littleEndian ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr));
@@ -650,7 +650,7 @@ FORCE_INLINE U64 XXH_readLE64_align(const void* ptr, XXH_endianess endian, XXH_a
         return endian==XXH_littleEndian ? *(const U64*)ptr : XXH_swap64(*(const U64*)ptr);
 }
 
-FORCE_INLINE U64 XXH_readLE64(const void* ptr, XXH_endianess endian)
+FORCE_INLINE U64 XXH_readLE64(const void* ptr, XXH_endianness endian)
 {
     return XXH_readLE64_align(ptr, endian, XXH_unaligned);
 }
@@ -700,7 +700,7 @@ static U64 XXH64_avalanche(U64 h64)
 
 static U64
 XXH64_finalize(U64 h64, const void* ptr, size_t len,
-               XXH_endianess endian, XXH_alignment align)
+               XXH_endianness endian, XXH_alignment align)
 {
     const BYTE* p = (const BYTE*)ptr;
 
@@ -809,7 +809,7 @@ XXH64_finalize(U64 h64, const void* ptr, size_t len,
 
 FORCE_INLINE U64
 XXH64_endian_align(const void* input, size_t len, U64 seed,
-                XXH_endianess endian, XXH_alignment align)
+                XXH_endianness endian, XXH_alignment align)
 {
     const BYTE* p = (const BYTE*)input;
     const BYTE* bEnd = p + len;
@@ -861,7 +861,7 @@ XXH_PUBLIC_API unsigned long long XXH64 (const void* input, size_t len, unsigned
     XXH64_update(&state, input, len);
     return XXH64_digest(&state);
 #else
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if (XXH_FORCE_ALIGN_CHECK) {
         if ((((size_t)input) & 7)==0) {  /* Input is aligned, let's leverage the speed advantage */
@@ -909,7 +909,7 @@ XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t* statePtr, unsigned long
 }
 
 FORCE_INLINE XXH_errorcode
-XXH64_update_endian (XXH64_state_t* state, const void* input, size_t len, XXH_endianess endian)
+XXH64_update_endian (XXH64_state_t* state, const void* input, size_t len, XXH_endianness endian)
 {
     if (input==NULL)
 #if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
@@ -970,7 +970,7 @@ XXH64_update_endian (XXH64_state_t* state, const void* input, size_t len, XXH_en
 
 XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void* input, size_t len)
 {
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
         return XXH64_update_endian(state_in, input, len, XXH_littleEndian);
@@ -978,7 +978,7 @@ XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void*
         return XXH64_update_endian(state_in, input, len, XXH_bigEndian);
 }
 
-FORCE_INLINE U64 XXH64_digest_endian (const XXH64_state_t* state, XXH_endianess endian)
+FORCE_INLINE U64 XXH64_digest_endian (const XXH64_state_t* state, XXH_endianness endian)
 {
     U64 h64;
 
@@ -1004,7 +1004,7 @@ FORCE_INLINE U64 XXH64_digest_endian (const XXH64_state_t* state, XXH_endianess
 
 XXH_PUBLIC_API unsigned long long XXH64_digest (const XXH64_state_t* state_in)
 {
-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+    XXH_endianness endian_detected = (XXH_endianness)XXH_CPU_LITTLE_ENDIAN;
 
     if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
         return XXH64_digest_endian(state_in, XXH_littleEndian);

lz4.mod/lz4/ossfuzz/decompress_fuzzer.c

@@ -67,7 +67,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     /* Partial decompression with small prefix. */
     LZ4_decompress_safe_partial_usingDict((char const*)dataAfterDict, dst, size,
                                   dstCapacity, dstCapacity, smallDict, smallDictSize);
-    /* Partial decompression wtih large prefix. */
+    /* Partial decompression with large prefix. */
     LZ4_decompress_safe_partial_usingDict((char const*)dataAfterDict, dst, size,
                                   dstCapacity, dstCapacity, largeDict, largeDictSize);
     free(dst);

lz4.mod/lz4/ossfuzz/fuzz_helpers.h

@@ -44,7 +44,7 @@ extern "C" {
           : (fprintf(stderr, "%s: %u: Assertion: `%s' failed. %s\n", __FILE__, \
                      __LINE__, FUZZ_QUOTE(cond), (msg)),                       \
              abort()))
-#define FUZZ_ASSERT(cond) FUZZ_ASSERT_MSG((cond), "");
+#define FUZZ_ASSERT(cond) FUZZ_ASSERT_MSG((cond), "")
 
 #if defined(__GNUC__)
 #define FUZZ_STATIC static __inline __attribute__((unused))

lz4.mod/lz4/programs/.gitignore

@@ -4,6 +4,7 @@ unlz4
 lz4cat
 lz4c
 lz4c32
+lz4-nomt
 lz4-wlib
 datagen
 frametest

lz4.mod/lz4/programs/COPYING

@@ -1,339 +1,83 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
-
- 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.
-
-                            Preamble
-
-  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.
-
-  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.
-
-  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.
-
-  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.
-
-  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.
-
-  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.
-
-  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.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  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.
-
-  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.
-
-  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.
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-    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
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-    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,
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-distribute the same sections as part of a whole which is a work based
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-entire whole, and thus to each and every part regardless of who wrote it.
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-Thus, it is not the intent of this section to claim rights or contest
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-
-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.
-
-  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
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-
-    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.
-
-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.
-
-  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.
-
-  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.
-
-  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.
-
-  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.
+Full name:
+GNU General Public License v2.0 or later
+
+Short identifier:
+GPL-2.0-or-later
+
+Text:
+GNU GENERAL PUBLIC LICENSE
+Version 2, June 1991
+
+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.
+
+Preamble
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.
+
+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.

lz4.mod/lz4/programs/Makefile

@@ -1,6 +1,6 @@
 # ##########################################################################
 # LZ4 programs - Makefile
-# Copyright (C) Yann Collet 2011-2020
+# Copyright (C) Yann Collet 2011-2023
 #
 # This Makefile is validated for Linux, macOS, *BSD, Hurd, Solaris, MSYS2 targets
 #
@@ -28,30 +28,30 @@
 # lz4c  : CLU, supporting also legacy lz4demo arguments
 # lz4c32: Same as lz4c, but forced to compile in 32-bits mode
 # ##########################################################################
-SED = sed
+SED ?= sed
 
 # Version numbers
-LZ4DIR   := ../lib
-LIBVER_SRC := $(LZ4DIR)/lz4.h
-LIBVER_MAJOR_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
-LIBVER_MINOR_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
-LIBVER_PATCH_SCRIPT:=`$(SED) -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
+LIBDIR   := ../lib
+LIBVER_SRC := $(LIBDIR)/lz4.h
+LIBVER_MAJOR_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
+LIBVER_MINOR_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
+LIBVER_PATCH_SCRIPT:=`$(SED) -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LIBVER_SRC)`
 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))
 LIBVER_PATCH := $(shell echo $(LIBVER_PATCH_SCRIPT))
 LIBVER   := $(shell echo $(LIBVER_SCRIPT))
 
-LIBFILES  = $(wildcard $(LZ4DIR)/*.c)
+LIBFILES  = $(wildcard $(LIBDIR)/*.c)
 SRCFILES  = $(sort $(LIBFILES) $(wildcard *.c))
 OBJFILES  = $(SRCFILES:.c=.o)
 
-CPPFLAGS += -I$(LZ4DIR) -DXXH_NAMESPACE=LZ4_
-CFLAGS   ?= -O3
 DEBUGFLAGS= -Wall -Wextra -Wundef -Wcast-qual -Wcast-align -Wshadow \
             -Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes \
             -Wpointer-arith -Wstrict-aliasing=1
-CFLAGS   += $(DEBUGFLAGS) $(MOREFLAGS)
+USERCFLAGS:= -O3 $(CFLAGS) # -O3 can be overruled by user-provided -Ox level
+CFLAGS    = $(DEBUGFLAGS) $(USERCFLAGS)
+CPPFLAGS += -I$(LIBDIR) -DXXH_NAMESPACE=LZ4_
 
 include ../Makefile.inc
 
@@ -60,20 +60,37 @@ ifeq ($(TARGET_OS)$(shell $(OS_VERSION)),SunOS5.10)
 LDFLAGS  += -lrt
 endif
 
-FLAGS     = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
+ALLFLAGS  = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
+
+# thread detection
+NUM_SYMBOL   := \#
+NO_THREAD_MSG:= ==> no multithread support: building for single-thread mode only
+HAVE_PTHREAD := $(shell printf '$(NUM_SYMBOL)include <pthread.h>\nint main(void) { return 0; }' > have_pthread.c && $(CC) $(ALLFLAGS) -o have_pthread$(EXT) have_pthread.c -pthread 2> $(VOID) && rm -f have_pthread$(EXT) && echo 1 || echo 0; rm have_pthread.c)
+HAVE_MULTITHREAD  := $(shell [ "$(HAVE_PTHREAD)" -eq "1" -o -n "$(filter Windows%,$(OS))" ] && echo 1 || echo 0)
+ifeq ($(HAVE_MULTITHREAD), 1)
+  THREAD_MSG := ==> building with multithreading support
+  THREAD_CPP := -DLZ4IO_MULTITHREAD
+  ifeq ($(HAVE_PTHREAD), 1)
+    THREAD_LD  := -pthread
+  endif
+else
+  THREAD_MSG := $(NO_THREAD_MSG)
+endif
 
 LZ4_VERSION=$(LIBVER)
-MD2ROFF   = ronn
+MD2ROFF    = ronn
 MD2ROFF_FLAGS = --roff --warnings --manual="User Commands" --organization="lz4 $(LZ4_VERSION)"
 
-
+.PHONY:default
 default: lz4-release
 
 # silent mode by default; verbose can be triggered by V=1 or VERBOSE=1
 $(V)$(VERBOSE).SILENT:
 
-all: lz4 lz4c
+.PHONY:all
+all: lz4 lz4-nomt lz4c unlz4 lz4cat
 
+.PHONY:all32
 all32: CFLAGS+=-m32
 all32: all
 
@@ -81,64 +98,89 @@ ifeq ($(WINBASED),yes)
 lz4-exe.rc: lz4-exe.rc.in
 	@echo creating executable resource
 	$(SED) -e 's|@PROGNAME@|lz4|' \
-         -e 's|@LIBVER_MAJOR@|$(LIBVER_MAJOR)|g' \
-         -e 's|@LIBVER_MINOR@|$(LIBVER_MINOR)|g' \
-         -e 's|@LIBVER_PATCH@|$(LIBVER_PATCH)|g' \
-         -e 's|@EXT@|$(EXT)|g' \
-          $< >$@
+           -e 's|@LIBVER_MAJOR@|$(LIBVER_MAJOR)|g' \
+           -e 's|@LIBVER_MINOR@|$(LIBVER_MINOR)|g' \
+           -e 's|@LIBVER_PATCH@|$(LIBVER_PATCH)|g' \
+           -e 's|@EXT@|.exe|g' \
+           $< >$@
 
 lz4-exe.o: lz4-exe.rc
 	$(WINDRES) -i lz4-exe.rc -o lz4-exe.o
 
+lz4: CPPFLAGS += $(THREAD_CPP)
+lz4: LDFLAGS += $(THREAD_LD)
 lz4: $(OBJFILES) lz4-exe.o
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+	echo "$(THREAD_MSG)"
+	$(CC) $(ALLFLAGS) $^ -o $@$(EXT)
 else
+lz4: CPPFLAGS += $(THREAD_CPP)
+lz4: LDFLAGS += $(THREAD_LD)
 lz4: $(OBJFILES)
-	$(CC) $(FLAGS) $(OBJFILES) -o $@$(EXT) $(LDLIBS)
+	echo "$(THREAD_MSG)"
+	$(CC) $(ALLFLAGS) $(OBJFILES) -o $@$(EXT) $(LDLIBS)
 endif
+CLEAN += lz4
 
 .PHONY: lz4-release
 lz4-release: DEBUGFLAGS=
+lz4-release: CPPFLAGS+=-DNDEBUG
 lz4-release: lz4
 
+CLEAN += lz4-nomt
+lz4-nomt: $(SRCFILES)
+	$(CC) $(ALLFLAGS) $^ -o $@$(EXT)
+
+CLEAN += lz4-wlib
 lz4-wlib: LIBFILES =
-lz4-wlib: SRCFILES+= $(LZ4DIR)/xxhash.c  # benchmark unit needs XXH64()
-lz4-wlib: LDFLAGS += -L $(LZ4DIR)
+lz4-wlib: SRCFILES+= $(LIBDIR)/xxhash.c  # benchmark unit needs XXH64()
+lz4-wlib: LDFLAGS += -L $(LIBDIR)
 lz4-wlib: LDLIBS   = -llz4
 lz4-wlib: liblz4 $(OBJFILES)
 	@echo WARNING: $@ must link to an extended variant of the dynamic library which also exposes unstable symbols
-	$(CC) $(FLAGS) $(OBJFILES) -o $@$(EXT) $(LDLIBS)
+	$(CC) $(ALLFLAGS) $(OBJFILES) -o $@$(EXT) $(LDLIBS)
 
 .PHONY:liblz4
 liblz4:
-	CPPFLAGS="-DLZ4F_PUBLISH_STATIC_FUNCTIONS -DLZ4_PUBLISH_STATIC_FUNCTIONS" $(MAKE) -C $(LZ4DIR) liblz4
+	CPPFLAGS="-DLZ4F_PUBLISH_STATIC_FUNCTIONS -DLZ4_PUBLISH_STATIC_FUNCTIONS" $(MAKE) -C $(LIBDIR) liblz4
 
+CLEAN += lz4c
 lz4c: lz4
 	$(LN_SF) lz4$(EXT) lz4c$(EXT)
 
+CLEAN += lz4c32
 lz4c32: CFLAGS += -m32
 lz4c32 : $(SRCFILES)
-	$(CC) $(FLAGS) $^ -o $@$(EXT)
+	$(CC) $(ALLFLAGS) $^ -o $@$(EXT)
+
+CLEAN += unlz4
+unlz4: lz4
+	$(LN_SF) lz4$(EXT) unlz4$(EXT)
+
+CLEAN += lz4cat
+lz4cat: lz4
+	$(LN_SF) lz4$(EXT) lz4cat$(EXT)
 
 lz4.1: lz4.1.md $(LIBVER_SRC)
 	cat $< | $(MD2ROFF) $(MD2ROFF_FLAGS) | $(SED) -n '/^\.\\\".*/!p' > $@
 
+.PHONY:man
 man: lz4.1
 
+.PHONY:clean-man
 clean-man:
 	$(RM) lz4.1
 
+.PHONY:preview-man
 preview-man: clean-man man
 	man ./lz4.1
 
+.PHONY:clean
 clean:
 ifeq ($(WINBASED),yes)
 	$(RM) *.rc
 endif
-	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
-	$(RM) core *.o *.test tmp* \
-           lz4$(EXT) lz4c$(EXT) lz4c32$(EXT) lz4-wlib$(EXT) \
-           unlz4$(EXT) lz4cat$(EXT)
+	$(MAKE) -C $(LIBDIR) $@ > $(VOID)
+	$(RM) $(CLEAN) *.o tmp* *.test core
 	@echo Cleaning completed
 
 
@@ -147,12 +189,6 @@ endif
 #-----------------------------------------------------------------------------
 ifeq ($(POSIX_ENV),Yes)
 
-unlz4: lz4
-	$(LN_SF) lz4$(EXT) unlz4$(EXT)
-
-lz4cat: lz4
-	$(LN_SF) lz4$(EXT) lz4cat$(EXT)
-
 DESTDIR     ?=
 # directory variables : GNU conventions prefer lowercase
 # see https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html
@@ -170,9 +206,10 @@ mandir      ?= $(MANDIR)
 MAN1DIR     ?= $(mandir)/man1
 man1dir     ?= $(MAN1DIR)
 
+.PHONY: install
 install: lz4
 	@echo Installing binaries in $(DESTDIR)$(bindir)
-	$(INSTALL_DIR) $(DESTDIR)$(bindir)/ $(DESTDIR)$(man1dir)/
+	$(MAKE_DIR) $(DESTDIR)$(bindir)/ $(DESTDIR)$(man1dir)/
 	$(INSTALL_PROGRAM) lz4$(EXT) $(DESTDIR)$(bindir)/lz4$(EXT)
 	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4c$(EXT)
 	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4cat$(EXT)
@@ -184,6 +221,7 @@ install: lz4
 	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/unlz4.1
 	@echo lz4 installation completed
 
+.PHONY: uninstall
 uninstall:
 	$(RM) $(DESTDIR)$(bindir)/lz4cat$(EXT)
 	$(RM) $(DESTDIR)$(bindir)/unlz4$(EXT)

lz4.mod/lz4/programs/README.md

@@ -2,38 +2,68 @@ Command Line Interface for LZ4 library
 ============================================
 
 ### Build
-The Command Line Interface (CLI) can be generated
-using the `make` command without any additional parameters.
-
-The `Makefile` script supports all [standard conventions](https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html),
-including standard targets (`all`, `install`, `clean`, etc.)
-and standard variables (`CC`, `CFLAGS`, `CPPFLAGS`, etc.).
-
-For advanced use cases, there are targets to different variations of the CLI:
-- `lz4` : default CLI, with a command line syntax close to gzip
-- `lz4c` : Same as `lz4` with additional support legacy lz4 commands (incompatible with gzip)
-- `lz4c32` : Same as `lz4c`, but forced to compile in 32-bits mode
+The `lz4` Command Line Interface (CLI) is generated
+using the `make` command, no additional parameter required.
 
 The CLI generates and decodes [LZ4-compressed frames](../doc/lz4_Frame_format.md).
 
+For more control over the build process,
+the `Makefile` script supports all [standard conventions](https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html),
+including standard targets (`all`, `install`, `clean`, etc.)
+and standard variables (`CC`, `CFLAGS`, `CPPFLAGS`, etc.).
 
-#### Aggregation of parameters
-CLI supports aggregation of parameters i.e. `-b1`, `-e18`, and `-i1` can be joined into `-b1e18i1`.
-
-
-#### Benchmark in Command Line Interface
-CLI includes in-memory compression benchmark module for lz4.
-The benchmark is conducted using a given filename.
-The file is read into memory.
-It makes benchmark more precise as it eliminates I/O overhead.
+The makefile offer several targets for various use cases:
+- `lz4` : default CLI, with a command line syntax similar to gzip
+- `lz4c` : supports legacy lz4 commands (incompatible with gzip)
+- `lz4c32` : Same as `lz4c`, but generates a 32-bits executable
+- `unlz4`, `lz4cat` : symlinks to `lz4`, default to decompression and `cat` compressed files
+- `man` : generates the man page, from `lz4.1.md` markdown source
+
+#### Makefile Build variables
+- `HAVE_MULTITHREAD` : build with multithreading support. Detection is generally automatic, but can be forced to `0` or `1` if needed. This is for example useful when cross-compiling for Windows from Linux.
+- `HAVE_PTHREAD` : determines presence of `<pthread>` support. Detection is automatic, but can be forced to `0` or `1` if needed. This is in turn used by `make` to automatically trigger multithreading support.
+
+#### C Preprocessor Build variables
+These variables are read by the preprocessor at compilation time. They influence executable behavior, such as default starting values, and are exposed from `programs/lz4conf.h`. These variables can manipulated by any build system.
+Assignment methods vary depending on environments.
+On a typical `posix` + `gcc` + `make` setup, they can be defined with `CPPFLAGS=-DVARIABLE=value` assignment.
+- `LZ4_CLEVEL_DEFAULT`: default compression level when none provided. Default is `1`.
+- `LZ4IO_MULTITHREAD`: enable multithreading support. Default is disabled.
+- `LZ4_NBWORKERS_DEFAULT`: default nb of worker threads used in multithreading mode (can be overridden with command `-T#`).
+   Default is `0`, which means "auto-determine" based on local cpu.
+- `LZ4_NBWORKERS_MAX`: absolute maximum nb of workers that can be requested at runtime.
+   Currently set to 200 by default.
+   This is mostly meant to protect the system against unreasonable and likely bogus requests, such as a million threads.
+- `LZ4_BLOCKSIZEID_DEFAULT`: default `lz4` block size code. Valid values are [4-7], corresponding to 64 KB, 256 KB, 1 MB and 4 MB. At the time of this writing, default is 7, corresponding to 4 MB block size.
+
+#### Environment Variables
+It's possible to pass some parameters to `lz4` via environment variables.
+This can be useful in situations where `lz4` is known to be invoked (from within a script for example) but there is no way to pass `lz4` parameters to influence the compression session.
+The environment variable has higher priority than binary default, but lower priority than corresponding runtime command.
+When set as global environment variables, it can enforce personalized defaults different from the binary set ones.
+
+`LZ4_CLEVEL` can be used to specify a default compression level that `lz4` employs for compression when no other compression level is specified on command line. Executable default is generally `1`.
+
+`LZ4_NBWORKERS` can be used to specify a default number of threads that `lz4` will employ for compression. Executable default is generally `0`, which means auto-determined based on local cpu. This functionality is only relevant when `lz4` is compiled with multithreading support. The maximum number of workers is capped at `LZ4_NBWORKERS_MAX` (`200` by default).
+
+### Aggregation of parameters
+The `lz4` CLI supports aggregation for short commands. For example, `-d`, `-q`, and `-f` can be joined into `-dqf`.
+Aggregation doesn't work for `--long-commands`, which **must** be separated.
+
+
+### Benchmark in Command Line Interface
+`lz4` CLI includes an in-memory compression benchmark module, triggered by command `-b#`, with `#` representing the compression level.
+The benchmark is conducted on a provided list of filenames.
+The files are then read entirely into memory, to eliminate I/O overhead.
+When multiple files are provided, they are bundled into the same benchmark session (though each file is a separate compression / decompression). Using `-S` command separates them (one session per file).
+When no file is provided, uses an internal Lorem Ipsum generator instead.
 
 The benchmark measures ratio, compressed size, compression and decompression speed.
-One can select compression levels starting from `-b` and ending with `-e`.
-The `-i` parameter selects a number of seconds used for each of tested levels.
-
+One can select multiple compression levels starting from `-b` and ending with `-e` (ascending).
+The `-i` parameter selects a number of seconds used for each session.
 
 
-#### Usage of Command Line Interface
+### Usage of Command Line Interface
 The full list of commands can be obtained with `-h` or `-H` parameter:
 ```
 Usage :

lz4.mod/lz4/programs/bench.c

@@ -43,9 +43,10 @@
 #include <time.h>        /* clock_t, clock, CLOCKS_PER_SEC */
 #include <assert.h>      /* assert */
 
-#include "datagen.h"     /* RDG_genBuffer */
+#include "lorem.h"       /* LOREM_genBuffer */
 #include "xxhash.h"
 #include "bench.h"
+#include "timefn.h"
 
 #define LZ4_STATIC_LINKING_ONLY
 #include "lz4.h"
@@ -66,7 +67,7 @@
 #define NBSECONDS             3
 #define TIMELOOP_MICROSEC     1*1000000ULL /* 1 second */
 #define TIMELOOP_NANOSEC      1*1000000000ULL /* 1 second */
-#define ACTIVEPERIOD_MICROSEC 70*1000000ULL /* 70 seconds */
+#define ACTIVEPERIOD_NANOSEC 70*1000000000ULL /* 70 seconds */
 #define COOLPERIOD_SEC        10
 #define DECOMP_MULT           1 /* test decompression DECOMP_MULT times longer than compression */
 
@@ -78,14 +79,14 @@
 
 static const size_t maxMemory = (sizeof(size_t)==4)  ?  (2 GB - 64 MB) : (size_t)(1ULL << ((sizeof(size_t)*8)-31));
 
-static U32 g_compressibilityDefault = 50;
-
 
 /* *************************************
 *  console display
 ***************************************/
+#define DISPLAYOUT(...)      fprintf(stdout, __VA_ARGS__)
+#define OUTLEVEL(l, ...)     if (g_displayLevel>=(l)) { DISPLAYOUT(__VA_ARGS__); }
 #define DISPLAY(...)         fprintf(stderr, __VA_ARGS__)
-#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
+#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=(l)) { DISPLAY(__VA_ARGS__); }
 static U32 g_displayLevel = 2;   /* 0 : no display;   1: errors;   2 : + result + interaction + warnings;   3 : + progression;   4 : + information */
 
 #define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
@@ -103,14 +104,14 @@ static clock_t g_time = 0;
 #  define DEBUG 0
 #endif
 #define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
-#define END_PROCESS(error, ...)                                             \
-{                                                                         \
+#define END_PROCESS(error, ...)                                           \
+do {                                                                      \
     DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
     DISPLAYLEVEL(1, "Error %i : ", error);                                \
     DISPLAYLEVEL(1, __VA_ARGS__);                                         \
     DISPLAYLEVEL(1, "\n");                                                \
     exit(error);                                                          \
-}
+} while (0)
 
 #define LZ4_isError(errcode) (errcode==0)
 
@@ -186,7 +187,7 @@ LZ4_compressInitStream(struct compressionParameters* pThis)
     pThis->LZ4_dictStream = LZ4_createStream();
     pThis->LZ4_streamHC = NULL;
     pThis->LZ4_dictStreamHC = NULL;
-    LZ4_loadDict(pThis->LZ4_dictStream, pThis->dictBuf, pThis->dictSize);
+    LZ4_loadDictSlow(pThis->LZ4_dictStream, pThis->dictBuf, pThis->dictSize);
 }
 
 static void
@@ -196,81 +197,84 @@ LZ4_compressInitStreamHC(struct compressionParameters* pThis)
     pThis->LZ4_dictStream = NULL;
     pThis->LZ4_streamHC = LZ4_createStreamHC();
     pThis->LZ4_dictStreamHC = LZ4_createStreamHC();
+    LZ4_resetStreamHC_fast(pThis->LZ4_dictStreamHC, pThis->cLevel);
     LZ4_loadDictHC(pThis->LZ4_dictStreamHC, pThis->dictBuf, pThis->dictSize);
 }
 
 static void
-LZ4_compressResetNoStream(const struct compressionParameters* pThis)
+LZ4_compressResetNoStream(const struct compressionParameters* cparams)
 {
-    (void)pThis;
+    (void)cparams;
 }
 
 static void
-LZ4_compressResetStream(const struct compressionParameters* pThis)
+LZ4_compressResetStream(const struct compressionParameters* cparams)
 {
-    LZ4_resetStream_fast(pThis->LZ4_stream);
-    LZ4_attach_dictionary(pThis->LZ4_stream, pThis->LZ4_dictStream);
+    LZ4_resetStream_fast(cparams->LZ4_stream);
+    LZ4_attach_dictionary(cparams->LZ4_stream, cparams->LZ4_dictStream);
 }
 
 static void
-LZ4_compressResetStreamHC(const struct compressionParameters* pThis)
+LZ4_compressResetStreamHC(const struct compressionParameters* cparams)
 {
-    LZ4_resetStreamHC_fast(pThis->LZ4_streamHC, pThis->cLevel);
-    LZ4_attach_HC_dictionary(pThis->LZ4_streamHC, pThis->LZ4_dictStreamHC);
+    LZ4_resetStreamHC_fast(cparams->LZ4_streamHC, cparams->cLevel);
+    LZ4_attach_HC_dictionary(cparams->LZ4_streamHC, cparams->LZ4_dictStreamHC);
 }
 
 static int
-LZ4_compressBlockNoStream(const struct compressionParameters* pThis,
+LZ4_compressBlockNoStream(const struct compressionParameters* cparams,
                           const char* src, char* dst,
                           int srcSize, int dstSize)
 {
-    int const acceleration = (pThis->cLevel < 0) ? -pThis->cLevel + 1 : 1;
+    int const acceleration = (cparams->cLevel < 0) ? -cparams->cLevel + 1 : 1;
     return LZ4_compress_fast(src, dst, srcSize, dstSize, acceleration);
 }
 
 static int
-LZ4_compressBlockNoStreamHC(const struct compressionParameters* pThis,
+LZ4_compressBlockNoStreamHC(const struct compressionParameters* cparams,
                             const char* src, char* dst,
                             int srcSize, int dstSize)
 {
-    return LZ4_compress_HC(src, dst, srcSize, dstSize, pThis->cLevel);
+    return LZ4_compress_HC(src, dst, srcSize, dstSize, cparams->cLevel);
 }
 
 static int
-LZ4_compressBlockStream(const struct compressionParameters* pThis,
+LZ4_compressBlockStream(const struct compressionParameters* cparams,
                         const char* src, char* dst,
                         int srcSize, int dstSize)
 {
-    int const acceleration = (pThis->cLevel < 0) ? -pThis->cLevel + 1 : 1;
-    return LZ4_compress_fast_continue(pThis->LZ4_stream, src, dst, srcSize, dstSize, acceleration);
+    int const acceleration = (cparams->cLevel < 0) ? -cparams->cLevel + 1 : 1;
+    LZ4_compressResetStream(cparams);
+    return LZ4_compress_fast_continue(cparams->LZ4_stream, src, dst, srcSize, dstSize, acceleration);
 }
 
 static int
-LZ4_compressBlockStreamHC(const struct compressionParameters* pThis,
+LZ4_compressBlockStreamHC(const struct compressionParameters* cparams,
                           const char* src, char* dst,
                           int srcSize, int dstSize)
 {
-    return LZ4_compress_HC_continue(pThis->LZ4_streamHC, src, dst, srcSize, dstSize);
+    LZ4_compressResetStreamHC(cparams);
+    return LZ4_compress_HC_continue(cparams->LZ4_streamHC, src, dst, srcSize, dstSize);
 }
 
 static void
-LZ4_compressCleanupNoStream(const struct compressionParameters* pThis)
+LZ4_compressCleanupNoStream(const struct compressionParameters* cparams)
 {
-    (void)pThis;
+    (void)cparams;
 }
 
 static void
-LZ4_compressCleanupStream(const struct compressionParameters* pThis)
+LZ4_compressCleanupStream(const struct compressionParameters* cparams)
 {
-    LZ4_freeStream(pThis->LZ4_stream);
-    LZ4_freeStream(pThis->LZ4_dictStream);
+    LZ4_freeStream(cparams->LZ4_stream);
+    LZ4_freeStream(cparams->LZ4_dictStream);
 }
 
 static void
-LZ4_compressCleanupStreamHC(const struct compressionParameters* pThis)
+LZ4_compressCleanupStreamHC(const struct compressionParameters* cparams)
 {
-    LZ4_freeStreamHC(pThis->LZ4_streamHC);
-    LZ4_freeStreamHC(pThis->LZ4_dictStreamHC);
+    LZ4_freeStreamHC(cparams->LZ4_streamHC);
+    LZ4_freeStreamHC(cparams->LZ4_dictStreamHC);
 }
 
 static void
@@ -367,6 +371,7 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
     size_t const maxInSize = (size_t)LZ4_MAX_INPUT_SIZE / decMultiplier;
     size_t const maxDecSize = srcSize < maxInSize ? srcSize * decMultiplier : LZ4_MAX_INPUT_SIZE;
     void* const resultBuffer = malloc(maxDecSize);
+    int benchError = 0;
     U32 nbBlocks;
     struct compressionParameters compP;
 
@@ -410,7 +415,7 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
     }   }   }
 
     /* warming up memory */
-    RDG_genBuffer(compressedBuffer, maxCompressedSize, 0.10, 0.50, 1);
+    memset(compressedBuffer, ' ', maxCompressedSize);
 
     /* decode-only mode : copy input to @compressedBuffer */
     if (g_decodeOnly) {
@@ -423,11 +428,11 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
     /* Bench */
     {   U64 fastestC = (U64)(-1LL), fastestD = (U64)(-1LL);
         U64 const crcOrig = XXH64(srcBuffer, srcSize, 0);
-        UTIL_time_t coolTime = UTIL_getTime();
+        TIME_t coolTime = TIME_getTime();
         U64 const maxTime = (g_nbSeconds * TIMELOOP_NANOSEC) + 100;
         U32 nbCompressionLoops = (U32)((5 MB) / (srcSize+1)) + 1;  /* conservative initial compression speed estimate */
         U32 nbDecodeLoops = (U32)((200 MB) / (srcSize+1)) + 1;  /* conservative initial decode speed estimate */
-        U64 totalCTime=0, totalDTime=0;
+        Duration_ns totalCTime=0, totalDTime=0;
         U32 cCompleted=(g_decodeOnly==1), dCompleted=0;
 #       define NB_MARKS 4
         const char* const marks[NB_MARKS] = { " |", " /", " =",  "\\" };
@@ -437,23 +442,27 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
         double ratio = 0.;
 
         DISPLAYLEVEL(2, "\r%79s\r", "");
+        if (g_nbSeconds==0) { nbCompressionLoops = 1; nbDecodeLoops = 1; }
         while (!cCompleted || !dCompleted) {
             /* overheat protection */
-            if (UTIL_clockSpanMicro(coolTime) > ACTIVEPERIOD_MICROSEC) {
+            if (TIME_clockSpan_ns(coolTime) > ACTIVEPERIOD_NANOSEC) {
                 DISPLAYLEVEL(2, "\rcooling down ...    \r");
                 UTIL_sleep(COOLPERIOD_SEC);
-                coolTime = UTIL_getTime();
+                coolTime = TIME_getTime();
             }
 
             /* Compression */
             DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->\r", marks[markNb], displayName, (U32)totalRSize);
-            if (!cCompleted) memset(compressedBuffer, 0xE5, maxCompressedSize);  /* warm up and erase compressed buffer */
+            if (!cCompleted) {
+                memset(compressedBuffer, 0xE5, maxCompressedSize);  /* warm up and erase compressed buffer */
+                { U32 blockNb; for (blockNb=0; blockNb<nbBlocks; blockNb++) blockTable[blockNb].cSize = 0; }
+            }
 
             UTIL_sleepMilli(1);  /* give processor time to other processes */
-            UTIL_waitForNextTick();
+            TIME_waitForNextTick();
 
             if (!cCompleted) {   /* still some time to do compression tests */
-                UTIL_time_t const clockStart = UTIL_getTime();
+                TIME_t const timeStart = TIME_getTime();
                 U32 nbLoops;
                 for (nbLoops=0; nbLoops < nbCompressionLoops; nbLoops++) {
                     U32 blockNb;
@@ -463,20 +472,23 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
                             &compP,
                             blockTable[blockNb].srcPtr, blockTable[blockNb].cPtr,
                             (int)blockTable[blockNb].srcSize, (int)blockTable[blockNb].cRoom);
-                        if (LZ4_isError(rSize)) END_PROCESS(1, "LZ4 compression failed");
+                        if (LZ4_isError(rSize)) {
+                            DISPLAY("LZ4 compression failed on block %u \n", blockNb);
+                            benchError =1 ;
+                        }
                         blockTable[blockNb].cSize = rSize;
                 }   }
-                {   U64 const clockSpan = UTIL_clockSpanNano(clockStart);
-                    if (clockSpan > 0) {
-                        if (clockSpan < fastestC * nbCompressionLoops)
-                            fastestC = clockSpan / nbCompressionLoops;
+                {   Duration_ns const duration_ns = TIME_clockSpan_ns(timeStart);
+                    if (duration_ns > 0) {
+                        if (duration_ns < fastestC * nbCompressionLoops)
+                            fastestC = duration_ns / nbCompressionLoops;
                         assert(fastestC > 0);
                         nbCompressionLoops = (U32)(TIMELOOP_NANOSEC / fastestC) + 1;  /* aim for ~1sec */
                     } else {
                         assert(nbCompressionLoops < 40000000);   /* avoid overflow */
                         nbCompressionLoops *= 100;
                     }
-                    totalCTime += clockSpan;
+                    totalCTime += duration_ns;
                     cCompleted = totalCTime>maxTime;
                 }
 
@@ -485,10 +497,11 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
                 cSize += !cSize;  /* avoid div by 0 */
                 ratio = (double)totalRSize / (double)cSize;
                 markNb = (markNb+1) % NB_MARKS;
-                DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s\r",
+                OUTLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s\r",
                         marks[markNb], displayName,
                         (U32)totalRSize, (U32)cSize, ratio,
-                        ((double)totalRSize / fastestC) * 1000 );
+                        ((double)totalRSize / (double)fastestC) * 1000 );
+                fflush(NULL);
             }
             (void)fastestD; (void)crcOrig;   /*  unused when decompression disabled */
 #if 1
@@ -496,14 +509,14 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
             if (!dCompleted) memset(resultBuffer, 0xD6, srcSize);  /* warm result buffer */
 
             UTIL_sleepMilli(5); /* give processor time to other processes */
-            UTIL_waitForNextTick();
+            TIME_waitForNextTick();
 
             if (!dCompleted) {
                 const DecFunction_f decFunction = g_decodeOnly ?
                     LZ4F_decompress_binding : LZ4_decompress_safe_usingDict;
                 const char* const decString = g_decodeOnly ?
                     "LZ4F_decompress" : "LZ4_decompress_safe_usingDict";
-                UTIL_time_t const clockStart = UTIL_getTime();
+                TIME_t const timeStart = TIME_getTime();
                 U32 nbLoops;
 
                 for (nbLoops=0; nbLoops < nbDecodeLoops; nbLoops++) {
@@ -522,22 +535,22 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
                                 decString, blockNb, (unsigned)blockTable[blockNb].srcSize);
                             if (g_decodeOnly)
                                 DISPLAY("Is input using LZ4 Frame format ? \n");
-                            END_PROCESS(2, "error during decoding");
+                            benchError = 1;
                             break;
                         }
                         blockTable[blockNb].resSize = (size_t)regenSize;
                 }   }
-                {   U64 const clockSpan = UTIL_clockSpanNano(clockStart);
-                    if (clockSpan > 0) {
-                        if (clockSpan < fastestD * nbDecodeLoops)
-                            fastestD = clockSpan / nbDecodeLoops;
+                {   Duration_ns const duration_ns = TIME_clockSpan_ns(timeStart);
+                    if (duration_ns > 0) {
+                        if (duration_ns < fastestD * nbDecodeLoops)
+                            fastestD = duration_ns / nbDecodeLoops;
                         assert(fastestD > 0);
                         nbDecodeLoops = (U32)(TIMELOOP_NANOSEC / fastestD) + 1;  /* aim for ~1sec */
                     } else {
                         assert(nbDecodeLoops < 40000000);   /* avoid overflow */
                         nbDecodeLoops *= 100;
                     }
-                    totalDTime += clockSpan;
+                    totalDTime += duration_ns;
                     dCompleted = totalDTime > (DECOMP_MULT*maxTime);
             }   }
 
@@ -548,11 +561,12 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
             }
             markNb = (markNb+1) % NB_MARKS;
             ratio  = (double)totalRSize / (double)cSize;
-            DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s ,%6.1f MB/s\r",
+            OUTLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s, %6.1f MB/s\r",
                     marks[markNb], displayName,
                     (U32)totalRSize, (U32)cSize, ratio,
-                    ((double)totalRSize / fastestC) * 1000,
-                    ((double)totalRSize / fastestD) * 1000);
+                    ((double)totalRSize / (double)fastestC) * 1000,
+                    ((double)totalRSize / (double)fastestD) * 1000);
+            fflush(NULL);
 
             /* CRC Checking (not possible in decode-only mode)*/
             if (!g_decodeOnly) {
@@ -560,6 +574,7 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
                 if (crcOrig!=crcCheck) {
                     size_t u;
                     DISPLAY("\n!!! WARNING !!! %17s : Invalid Checksum : %x != %x   \n", displayName, (unsigned)crcOrig, (unsigned)crcCheck);
+                    benchError = 1;
                     for (u=0; u<srcSize; u++) {
                         if (((const BYTE*)srcBuffer)[u] != ((const BYTE*)resultBuffer)[u]) {
                             U32 segNb, bNb, pos;
@@ -582,15 +597,17 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
 #endif
         }   /* for (testNb = 1; testNb <= (g_nbSeconds + !g_nbSeconds); testNb++) */
 
+        OUTLEVEL(2, "%2i#\n", cLevel);
+
+        /* quiet mode */
         if (g_displayLevel == 1) {
-            double const cSpeed = ((double)srcSize / fastestC) * 1000;
-            double const dSpeed = ((double)srcSize / fastestD) * 1000;
+            double const cSpeed = ((double)srcSize / (double)fastestC) * 1000;
+            double const dSpeed = ((double)srcSize / (double)fastestD) * 1000;
+            DISPLAYOUT("-%-3i%11i (%5.3f) %6.2f MB/s %6.1f MB/s  %s ", cLevel, (int)cSize, ratio, cSpeed, dSpeed, displayName);
             if (g_additionalParam)
-                DISPLAY("-%-3i%11i (%5.3f) %6.2f MB/s %6.1f MB/s  %s (param=%d)\n", cLevel, (int)cSize, ratio, cSpeed, dSpeed, displayName, g_additionalParam);
-            else
-                DISPLAY("-%-3i%11i (%5.3f) %6.2f MB/s %6.1f MB/s  %s\n", cLevel, (int)cSize, ratio, cSpeed, dSpeed, displayName);
+                DISPLAYOUT("(param=%d)", g_additionalParam);
+            DISPLAYOUT("\n");
         }
-        DISPLAYLEVEL(2, "%2i#\n", cLevel);
     }   /* Bench */
 
     /* clean up */
@@ -598,7 +615,7 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
     free(blockTable);
     free(compressedBuffer);
     free(resultBuffer);
-    return 0;
+    return benchError;
 }
 
 
@@ -626,13 +643,13 @@ static size_t BMK_findMaxMem(U64 requiredMem)
 }
 
 
-static void BMK_benchCLevel(void* srcBuffer, size_t benchedSize,
+static int BMK_benchCLevel(void* srcBuffer, size_t benchedSize,
                             const char* displayName, int cLevel, int cLevelLast,
                             const size_t* fileSizes, unsigned nbFiles,
                             const char* dictBuf, int dictSize)
 {
     int l;
-
+    int benchError = 0;
     const char* pch = strrchr(displayName, '\\'); /* Windows */
     if (!pch) pch = strrchr(displayName, '/'); /* Linux */
     if (pch) displayName = pch+1;
@@ -645,11 +662,13 @@ static void BMK_benchCLevel(void* srcBuffer, size_t benchedSize,
     if (cLevelLast < cLevel) cLevelLast = cLevel;
 
     for (l=cLevel; l <= cLevelLast; l++) {
-        BMK_benchMem(srcBuffer, benchedSize,
-                     displayName, l,
-                     fileSizes, nbFiles,
-                     dictBuf, dictSize);
+        benchError |= BMK_benchMem(
+                            srcBuffer, benchedSize,
+                            displayName, l,
+                            fileSizes, nbFiles,
+                            dictBuf, dictSize);
     }
+    return benchError;
 }
 
 
@@ -688,12 +707,13 @@ static void BMK_loadFiles(void* buffer, size_t bufferSize,
     if (totalSize == 0) END_PROCESS(12, "no data to bench");
 }
 
-static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
-                               int cLevel, int cLevelLast,
-                               const char* dictBuf, int dictSize)
+static int BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
+                              int cLevel, int cLevelLast,
+                              const char* dictBuf, int dictSize)
 {
     void* srcBuffer;
     size_t benchedSize;
+    int benchError = 0;
     size_t* fileSizes = (size_t*)malloc(nbFiles * sizeof(size_t));
     U64 const totalSizeToLoad = UTIL_getTotalFileSize(fileNamesTable, nbFiles);
     char mfName[20] = {0};
@@ -720,7 +740,7 @@ static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
     /* Bench */
     snprintf (mfName, sizeof(mfName), " %u files", nbFiles);
     {   const char* displayName = (nbFiles > 1) ? mfName : fileNamesTable[0];
-        BMK_benchCLevel(srcBuffer, benchedSize,
+        benchError = BMK_benchCLevel(srcBuffer, benchedSize,
                         displayName, cLevel, cLevelLast,
                         fileSizes, nbFiles,
                         dictBuf, dictSize);
@@ -729,28 +749,35 @@ static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
     /* clean up */
     free(srcBuffer);
     free(fileSizes);
+    return benchError;
 }
 
 
-static void BMK_syntheticTest(int cLevel, int cLevelLast, double compressibility,
-                              const char* dictBuf, int dictSize)
+static int BMK_syntheticTest(int cLevel, int cLevelLast,
+                             const char* dictBuf, int dictSize)
 {
-    char name[20] = {0};
-    size_t benchedSize = 10000000;
+    int benchError = 0;
+    size_t const benchedSize = 10000000;
     void* const srcBuffer = malloc(benchedSize);
 
     /* Memory allocation */
     if (!srcBuffer) END_PROCESS(21, "not enough memory");
 
     /* Fill input buffer */
-    RDG_genBuffer(srcBuffer, benchedSize, compressibility, 0.0, 0);
+    LOREM_genBuffer(srcBuffer, benchedSize, 0);
 
     /* Bench */
-    snprintf (name, sizeof(name), "Synthetic %2u%%", (unsigned)(compressibility*100));
-    BMK_benchCLevel(srcBuffer, benchedSize, name, cLevel, cLevelLast, &benchedSize, 1, dictBuf, dictSize);
+    benchError = BMK_benchCLevel(srcBuffer, benchedSize,
+                    "Lorem ipsum",
+                    cLevel, cLevelLast,
+                    &benchedSize,
+                    1,
+                    dictBuf, dictSize);
 
     /* clean up */
     free(srcBuffer);
+
+    return benchError;
 }
 
 
@@ -759,15 +786,16 @@ BMK_benchFilesSeparately(const char** fileNamesTable, unsigned nbFiles,
                    int cLevel, int cLevelLast,
                    const char* dictBuf, int dictSize)
 {
+    int benchError = 0;
     unsigned fileNb;
     if (cLevel > LZ4HC_CLEVEL_MAX) cLevel = LZ4HC_CLEVEL_MAX;
     if (cLevelLast > LZ4HC_CLEVEL_MAX) cLevelLast = LZ4HC_CLEVEL_MAX;
     if (cLevelLast < cLevel) cLevelLast = cLevel;
 
     for (fileNb=0; fileNb<nbFiles; fileNb++)
-        BMK_benchFileTable(fileNamesTable+fileNb, 1, cLevel, cLevelLast, dictBuf, dictSize);
+        benchError |= BMK_benchFileTable(fileNamesTable+fileNb, 1, cLevel, cLevelLast, dictBuf, dictSize);
 
-    return 0;
+    return benchError;
 }
 
 
@@ -775,7 +803,7 @@ int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
                    int cLevel, int cLevelLast,
                    const char* dictFileName)
 {
-    double const compressibility = (double)g_compressibilityDefault / 100;
+    int benchError = 0;
     char* dictBuf = NULL;
     size_t dictSize = 0;
 
@@ -823,15 +851,15 @@ int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
         fclose(dictFile);
     }
 
-    if (nbFiles == 0)
-        BMK_syntheticTest(cLevel, cLevelLast, compressibility, dictBuf, (int)dictSize);
-    else {
+    if (nbFiles == 0) {
+        benchError = BMK_syntheticTest(cLevel, cLevelLast, dictBuf, (int)dictSize);
+    } else {
         if (g_benchSeparately)
-            BMK_benchFilesSeparately(fileNamesTable, nbFiles, cLevel, cLevelLast, dictBuf, (int)dictSize);
+            benchError = BMK_benchFilesSeparately(fileNamesTable, nbFiles, cLevel, cLevelLast, dictBuf, (int)dictSize);
         else
-            BMK_benchFileTable(fileNamesTable, nbFiles, cLevel, cLevelLast, dictBuf, (int)dictSize);
+            benchError = BMK_benchFileTable(fileNamesTable, nbFiles, cLevel, cLevelLast, dictBuf, (int)dictSize);
     }
 
     free(dictBuf);
-    return 0;
+    return benchError;
 }

lz4.mod/lz4/programs/lorem.c

@@ -0,0 +1,366 @@
+/*
+    lorem.c - lorem ipsum generator
+    Copyright (C) Yann Collet 2024
+
+    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.
+
+    You can contact the author at :
+   - LZ4 source repository : https://github.com/lz4/lz4
+   - Public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+
+/* Implementation notes:
+ *
+ * This is a very simple lorem ipsum generator
+ * which features a static list of words
+ * and print them one after another randomly
+ * with a fake sentence / paragraph structure.
+ *
+ * The goal is to generate a printable text
+ * that can be used to fake a text compression scenario.
+ * The resulting compression / ratio curve of the lorem ipsum generator
+ * is more satisfying than the previous statistical generator,
+ * which was initially designed for entropy compression,
+ * and lacks a regularity more representative of text.
+ *
+ * The compression ratio achievable on the generated lorem ipsum
+ * is still a bit too good, presumably because the dictionary is a bit too
+ * small. It would be possible to create some more complex scheme, notably by
+ * enlarging the dictionary with a word generator, and adding grammatical rules
+ * (composition) and syntax rules. But that's probably overkill for the intended
+ * goal.
+ */
+
+#include "lorem.h"
+#include <assert.h>
+#include <limits.h> /* INT_MAX */
+#include <stdlib.h> /* malloc, abort */
+#include <string.h> /* memcpy */
+
+/* Define the word pool
+ * Note: all words must have a len <= 16 */
+static const char* kWords[] = {
+    "lorem",        "ipsum",      "dolor",       "sit",          "amet",
+    "consectetur",  "adipiscing", "elit",        "sed",          "do",
+    "eiusmod",      "tempor",     "incididunt",  "ut",           "labore",
+    "et",           "dolore",     "magna",       "aliqua",       "dis",
+    "lectus",       "vestibulum", "mattis",      "ullamcorper",  "velit",
+    "commodo",      "a",          "lacus",       "arcu",         "magnis",
+    "parturient",   "montes",     "nascetur",    "ridiculus",    "mus",
+    "mauris",       "nulla",      "malesuada",   "pellentesque", "eget",
+    "gravida",      "in",         "dictum",      "non",          "erat",
+    "nam",          "voluptat",   "maecenas",    "blandit",      "aliquam",
+    "etiam",        "enim",       "lobortis",    "scelerisque",  "fermentum",
+    "dui",          "faucibus",   "ornare",      "at",           "elementum",
+    "eu",           "facilisis",  "odio",        "morbi",        "quis",
+    "eros",         "donec",      "ac",          "orci",         "purus",
+    "turpis",       "cursus",     "leo",         "vel",          "porta",
+    "consequat",    "interdum",   "varius",      "vulputate",    "aliquet",
+    "pharetra",     "nunc",       "auctor",      "urna",         "id",
+    "metus",        "viverra",    "nibh",        "cras",         "mi",
+    "unde",         "omnis",      "iste",        "natus",        "error",
+    "perspiciatis", "voluptatem", "accusantium", "doloremque",   "laudantium",
+    "totam",        "rem",        "aperiam",     "eaque",        "ipsa",
+    "quae",         "ab",         "illo",        "inventore",    "veritatis",
+    "quasi",        "architecto", "beatae",      "vitae",        "dicta",
+    "sunt",         "explicabo",  "nemo",        "ipsam",        "quia",
+    "voluptas",     "aspernatur", "aut",         "odit",         "fugit",
+    "consequuntur", "magni",      "dolores",     "eos",          "qui",
+    "ratione",      "sequi",      "nesciunt",    "neque",        "porro",
+    "quisquam",     "est",        "dolorem",     "adipisci",     "numquam",
+    "eius",         "modi",       "tempora",     "incidunt",     "magnam",
+    "quaerat",      "ad",         "minima",      "veniam",       "nostrum",
+    "ullam",        "corporis",   "suscipit",    "laboriosam",   "nisi",
+    "aliquid",      "ex",         "ea",          "commodi",      "consequatur",
+    "autem",        "eum",        "iure",        "voluptate",    "esse",
+    "quam",         "nihil",      "molestiae",   "illum",        "fugiat",
+    "quo",          "pariatur",   "vero",        "accusamus",    "iusto",
+    "dignissimos",  "ducimus",    "blanditiis",  "praesentium",  "voluptatum",
+    "deleniti",     "atque",      "corrupti",    "quos",         "quas",
+    "molestias",    "excepturi",  "sint",        "occaecati",    "cupiditate",
+    "provident",    "similique",  "culpa",       "officia",      "deserunt",
+    "mollitia",     "animi",      "laborum",     "dolorum",      "fuga",
+    "harum",        "quidem",     "rerum",       "facilis",      "expedita",
+    "distinctio",   "libero",     "tempore",     "cum",          "soluta",
+    "nobis",        "eligendi",   "optio",       "cumque",       "impedit",
+    "minus",        "quod",       "maxime",      "placeat",      "facere",
+    "possimus",     "assumenda",  "repellendus", "temporibus",   "quibusdam",
+    "officiis",     "debitis",    "saepe",       "eveniet",      "voluptates",
+    "repudiandae",  "recusandae", "itaque",      "earum",        "hic",
+    "tenetur",      "sapiente",   "delectus",    "reiciendis",   "cillum",
+    "maiores",      "alias",      "perferendis", "doloribus",    "asperiores",
+    "repellat",     "minim",      "nostrud",     "exercitation", "ullamco",
+    "laboris",      "aliquip",    "duis",        "aute",         "irure",
+};
+#define KNBWORDS (sizeof(kWords) / sizeof(kWords[0]))
+static const unsigned kNbWords = KNBWORDS;
+
+static const char* g_words[KNBWORDS] = { NULL };
+static unsigned g_wordLen[KNBWORDS] = {0};
+static char* g_wordBuffer = NULL;
+
+/* simple 1-dimension distribution, based on word's length, favors small words
+ */
+static const int kWeights[]      = { 0, 8, 6, 4, 3, 2 };
+static const unsigned kNbWeights = sizeof(kWeights) / sizeof(kWeights[0]);
+
+#define DISTRIB_SIZE_MAX 650
+static int g_distrib[DISTRIB_SIZE_MAX] = { 0 };
+static unsigned g_distribCount         = 0;
+
+static void countFreqs(
+        const unsigned wordLen[],
+        size_t nbWords,
+        const int* weights,
+        unsigned long nbWeights)
+{
+    unsigned total = 0;
+    size_t w;
+    for (w = 0; w < nbWords; w++) {
+        size_t len = wordLen[w];
+        int lmax;
+        if (len >= nbWeights)
+            len = nbWeights - 1;
+        lmax = weights[len];
+        total += (unsigned)lmax;
+    }
+    g_distribCount = total;
+    assert(g_distribCount <= DISTRIB_SIZE_MAX);
+}
+
+static void init_word_len(
+        const char* words[],
+        size_t nbWords)
+{
+    size_t n;
+    assert(words != NULL);
+    for (n=0; n<nbWords; n++) {
+        assert(words[n] != NULL);
+        assert(strlen(words[n]) < 256);
+        g_wordLen[n] = (unsigned char)strlen(words[n]);
+    }
+
+}
+
+static size_t sumLen(const unsigned* sizes, size_t s)
+{
+    size_t total = 0;
+    size_t n;
+    assert(sizes != NULL);
+    for (n=0; n<s; n++) {
+        total += sizes[n];
+    }
+    return total;
+}
+
+static void init_word_buffer(void)
+{
+    size_t n;
+    size_t const bufSize = sumLen(g_wordLen, kNbWords) + 16;
+    char* ptr;
+    assert(g_wordBuffer == NULL);
+    g_wordBuffer = (char*)calloc(1, bufSize);
+    if (g_wordBuffer == NULL) abort();
+    ptr = g_wordBuffer;
+    for (n=0; n<kNbWords; n++) {
+        memcpy(ptr, kWords[n], g_wordLen[n]);
+        g_words[n] = ptr;
+        ptr += g_wordLen[n];
+    }
+}
+
+static void init_word_distrib(
+        const unsigned wordLen[],
+        size_t nbWords,
+        const int* weights,
+        unsigned long nbWeights)
+{
+    size_t w, d = 0;
+    countFreqs(wordLen, nbWords, weights, nbWeights);
+    for (w = 0; w < nbWords; w++) {
+        size_t len = wordLen[w];
+        int l, lmax;
+        if (len >= nbWeights)
+            len = nbWeights - 1;
+        lmax = weights[len];
+        for (l = 0; l < lmax; l++) {
+            g_distrib[d++] = (int)w;
+        }
+    }
+}
+
+/* Note: this unit only works when invoked sequentially.
+ * No concurrent access is allowed */
+static char* g_ptr         = NULL;
+static size_t g_nbChars    = 0;
+static size_t g_maxChars   = 10000000;
+static unsigned g_randRoot = 0;
+
+#define RDG_rotl32(x, r) ((x << r) | (x >> (32 - r)))
+static unsigned LOREM_rand(unsigned range)
+{
+    static const unsigned prime1 = 2654435761U;
+    static const unsigned prime2 = 2246822519U;
+    unsigned rand32              = g_randRoot;
+    rand32 *= prime1;
+    rand32 ^= prime2;
+    rand32     = RDG_rotl32(rand32, 13);
+    g_randRoot = rand32;
+    return (unsigned)(((unsigned long long)rand32 * range) >> 32);
+}
+
+static void writeLastCharacters(void)
+{
+    size_t lastChars = g_maxChars - g_nbChars;
+    assert(g_maxChars >= g_nbChars);
+    if (lastChars == 0)
+        return;
+    g_ptr[g_nbChars++] = '.';
+    if (lastChars > 2) {
+        memset(g_ptr + g_nbChars, ' ', lastChars - 2);
+    }
+    if (lastChars > 1) {
+        g_ptr[g_maxChars - 1] = '\n';
+    }
+    g_nbChars = g_maxChars;
+}
+
+static void generateLastWord(const char* word, size_t wordLen, int upCase)
+{
+    if (g_nbChars + wordLen + 2 > g_maxChars) {
+        writeLastCharacters();
+        return;
+    }
+    memcpy(g_ptr + g_nbChars, word, wordLen);
+    if (upCase) {
+        static const char toUp = 'A' - 'a';
+        g_ptr[g_nbChars]       = (char)(g_ptr[g_nbChars] + toUp);
+    }
+    g_nbChars += wordLen;
+    writeLastCharacters();
+}
+
+#define MAX(a,b)  ((a)<(b)?(b):(a))
+static void generateWord(const char* word, size_t wordLen, const char* separator, size_t sepLen, int upCase)
+{
+    size_t const wlen = MAX(16, wordLen + 2);
+    if (g_nbChars + wlen > g_maxChars) {
+        generateLastWord(word, wordLen, upCase);
+        return;
+    }
+    assert(wordLen <= 16);
+    memcpy(g_ptr + g_nbChars, word, 16);
+    if (upCase) {
+        static const char toUp = 'A' - 'a';
+        g_ptr[g_nbChars]       = (char)(g_ptr[g_nbChars] + toUp);
+    }
+    g_nbChars += wordLen;
+    assert(sepLen <= 2);
+    memcpy(g_ptr + g_nbChars, separator, 2);
+    g_nbChars += sepLen;
+}
+
+static int about(unsigned target)
+{
+    return (int)(LOREM_rand(target) + LOREM_rand(target) + 1);
+}
+
+/* Function to generate a random sentence */
+static void generateSentence(int nbWords)
+{
+    int commaPos       = about(9);
+    int comma2         = commaPos + about(7);
+    int qmark          = (LOREM_rand(11) == 7);
+    const char* endSep = qmark ? "? " : ". ";
+    int i;
+    for (i = 0; i < nbWords; i++) {
+        int const wordID       = g_distrib[LOREM_rand(g_distribCount)];
+        const char* sep        = " ";
+        size_t sepLen = 1;
+        if (i == commaPos)
+            sep = ", ", sepLen=2;
+        if (i == comma2)
+            sep = ", ", sepLen=2;
+        if (i == nbWords - 1)
+            sep = endSep, sepLen=2;
+        generateWord(g_words[wordID], g_wordLen[wordID], sep, sepLen, i == 0);
+    }
+}
+
+static void generateParagraph(int nbSentences)
+{
+    int i;
+    for (i = 0; i < nbSentences; i++) {
+        int wordsPerSentence = about(11);
+        generateSentence(wordsPerSentence);
+    }
+    if (g_nbChars < g_maxChars) {
+        g_ptr[g_nbChars++] = '\n';
+    }
+    if (g_nbChars < g_maxChars) {
+        g_ptr[g_nbChars++] = '\n';
+    }
+}
+
+/* It's "common" for lorem ipsum generators to start with the same first
+ * pre-defined sentence */
+static void generateFirstSentence(void)
+{
+    int i;
+    for (i = 0; i < 18; i++) {
+        const char* separator = " ";
+        size_t sepLen = 1;
+        if (i == 4)
+            separator = ", ", sepLen=2;
+        if (i == 7)
+            separator = ", ", sepLen=2;
+        generateWord(g_words[i], g_wordLen[i], separator, sepLen, i == 0);
+    }
+    generateWord(g_words[18], g_wordLen[18], ". ", 2, 0);
+}
+
+size_t
+LOREM_genBlock(void* buffer, size_t size, unsigned seed, int first, int fill)
+{
+    g_ptr = (char*)buffer;
+    assert(size < INT_MAX);
+    g_maxChars = size;
+    g_nbChars  = 0;
+    g_randRoot = seed;
+    if (g_distribCount == 0) {
+        init_word_len(kWords, kNbWords);
+        init_word_buffer();
+        init_word_distrib(g_wordLen, kNbWords, kWeights, kNbWeights);
+    }
+
+    if (first) {
+        generateFirstSentence();
+    }
+    while (g_nbChars < g_maxChars) {
+        int sentencePerParagraph = about(7);
+        generateParagraph(sentencePerParagraph);
+        if (!fill)
+            break; /* only generate one paragraph in not-fill mode */
+    }
+    g_ptr = NULL;
+    return g_nbChars;
+}
+
+void LOREM_genBuffer(void* buffer, size_t size, unsigned seed)
+{
+    LOREM_genBlock(buffer, size, seed, 1, 1);
+}

lz4.mod/lz4/programs/lorem.h

@@ -0,0 +1,46 @@
+/*
+    lorem.h - lorem ipsum generator
+    Copyright (C) Yann Collet 2024
+
+    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.
+
+    You can contact the author at :
+   - LZ4 source repository : https://github.com/lz4/lz4
+   - Public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+
+
+#include <stddef.h>   /* size_t */
+
+/*
+ * LOREM_genBuffer():
+ * Generate @size bytes of compressible data using lorem ipsum generator
+ * into provided @buffer.
+ */
+void LOREM_genBuffer(void* buffer, size_t size, unsigned seed);
+
+/*
+ * LOREM_genBlock():
+ * Similar to LOREM_genBuffer, with additional controls :
+ * - @first : generate the first sentence
+ * - @fill : fill the entire @buffer,
+ *           if ==0: generate one paragraph at most.
+ * @return : nb of bytes generated into @buffer.
+ */
+size_t LOREM_genBlock(void* buffer, size_t size,
+                      unsigned seed,
+                      int first, int fill);

lz4.mod/lz4/programs/lz4.1

@@ -1,5 +1,5 @@
 .
-.TH "LZ4" "1" "August 2022" "lz4 v1.9.4" "User Commands"
+.TH "LZ4" "1" "July 2024" "lz4 1.10.0" "User Commands"
 .
 .SH "NAME"
 \fBlz4\fR \- lz4, unlz4, lz4cat \- Compress or decompress \.lz4 files
@@ -17,7 +17,7 @@
 When writing scripts that need to decompress files, it is recommended to always use the name \fBlz4\fR with appropriate arguments (\fBlz4 \-d\fR or \fBlz4 \-dc\fR) instead of the names \fBunlz4\fR and \fBlz4cat\fR\.
 .
 .SH "DESCRIPTION"
-\fBlz4\fR is an extremely fast lossless compression algorithm, based on \fBbyte\-aligned LZ77\fR family of compression scheme\. \fBlz4\fR offers compression speeds > 500 MB/s per core, linearly scalable with multi\-core CPUs\. It features an extremely fast decoder, offering speed in multiple GB/s per core, typically reaching RAM speed limit on multi\-core systems\. The native file format is the \fB\.lz4\fR format\.
+\fBlz4\fR is a CLI based on \fBliblz4\fR, an extremely fast implementation of lossless compression algorithm\. It provides a default compression speed of typically > 500 MB/s per core\. Speed can traded for higher compression ratio, by increasing the compression level parameter\. While decompression is single\-threaded, it reaches multiple GB/s, generally fast enough to be I/O bound\. \fBlz4\fR native file format is the \fB\.lz4\fR format\.
 .
 .SS "Difference between lz4 and gzip"
 \fBlz4\fR supports a command line syntax similar \fIbut not identical\fR to \fBgzip(1)\fR\. Differences are :
@@ -58,7 +58,7 @@ Similarly, \fBlz4 \-m \-d\fR can decompress multiple \fB*\.lz4\fR files\.
 It\'s possible to opt\-in to erase source files on successful compression or decompression, using \fB\-\-rm\fR command\.
 .
 .IP "\(bu" 4
-Consequently, \fBlz4 \-m \-\-rm\fR behaves the same as \fBgzip\fR\.
+Consequently, \fBlz4 \-m \-\-rm\fR features a behavior closer to the \fBgzip\fR one\.
 .
 .IP "" 0
 .
@@ -107,7 +107,7 @@ Benchmark mode, using \fB#\fR compression level\.
 .
 .TP
 \fB\-\-list\fR
-List information about \.lz4 files\. note : current implementation is limited to single\-frame \.lz4 files\.
+List information about \.lz4 files\. For detailed information on files with multiple frames, use \fB\-v\fR\. \fB\-\-list\fR automatically triggers \fB\-m\fR modifier\.
 .
 .SS "Operation modifiers"
 .
@@ -124,6 +124,10 @@ Switch to ultra\-fast compression levels\. The higher the value, the faster the
 Set highest compression level\. Same as \-12\.
 .
 .TP
+\fB\-T#\fR, \fB\-\-threads=#\fR
+Use \fB#\fR threads for compression\. When \fB0\fR, or none provided: automatically determined from nb of detected cores\.
+.
+.TP
 \fB\-\-favor\-decSpeed\fR
 Generate compressed data optimized for decompression speed\. Compressed data will be larger as a consequence (typically by ~0\.5%), while decompression speed will be improved by 5\-20%, depending on use cases\. This option only works in combination with very high compression levels (>=10)\.
 .
@@ -242,6 +246,17 @@ Benchmark multiple compression levels, from b# to e# (included)
 \fB\-i#\fR
 Minimum evaluation time in seconds [1\-9] (default : 3)
 .
+.SS "Environment Variables"
+It\'s possible to pass some parameters to \fBlz4\fR via environment variables\. This can be useful in situations where \fBlz4\fR is known to be invoked (from a script for example) but there is no way to pass \fBlz4\fR parameters to influence the compression session\. The environment variable has higher priority than executable default, but lower priority than corresponding runtime command\. When set as global environment variables, it can be a way to enforce personalized defaults different from the executable set ones\.
+.
+.TP
+\fBLZ4_CLEVEL\fR
+specify a default compression level that \fBlz4\fR employs for compression when no other compression level is specified on command line\. Executable default is generally \fB1\fR\.
+.
+.TP
+\fBLZ4_NBWORKERS\fR
+specify a default number of threads that \fBlz4\fR will employ for compression\. Executable default is generally \fB0\fR, which means auto\-determined based on local cpu\. This functionality is only relevant when \fBlz4\fR is compiled with multithreading support\. The maximum number of workers is capped at \fBLZ4_NBWORKERS_MAX\fR (\fB200\fR by default)\.
+.
 .SH "BUGS"
 Report bugs at: https://github\.com/lz4/lz4/issues
 .