Integrate LZ4 library, compress the ramdisk

.gitignore

@@ -3,4 +3,5 @@ mop3.iso
 bochs-log.txt
 bochs-com1.txt
 mop3dist.tar
+mop3dist.tar.lz4
 site/

Makefile

@@ -1,5 +1,6 @@
 platform ?= amd64
 
+include make/lz4.mk
 include make/apps.mk
 include make/kernel.mk
 include make/dist.mk

aux/devel.sh

@@ -8,6 +8,7 @@ if [ "$1" = "debug" ]; then
   debugopt="buildtype=debug"
 fi
 
+make -B all_lz4
 make -B all_kernel        "$debugopt"
 make -B all_libsystem     "$debugopt"
 make -B all_liballoc      "$debugopt"

aux/limine_iso_amd64.sh

@@ -11,7 +11,7 @@ cp -v boot/limine/limine-bios.sys boot/limine/limine-bios-cd.bin \
 
 cp -v boot/limine/BOOTX64.EFI boot/limine/BOOTIA32.EFI iso_root/EFI/BOOT
 
-cp -v mop3dist.tar iso_root/boot
+cp -v mop3dist.tar.lz4 iso_root/boot
 
 xorriso -as mkisofs -R -r -J -b boot/limine/limine-bios-cd.bin \
   -no-emul-boot -boot-load-size 4 -boot-info-table -hfsplus \

boot/limine.conf

@@ -3,4 +3,4 @@ timeout: 10
 /mop3
   protocol: limine
   path: boot():/boot/kernel.elf
-  module_path: boot():/boot/mop3dist.tar
+  module_path: boot():/boot/mop3dist.tar.lz4

kernel/Makefile

@@ -30,6 +30,7 @@ format:
 		':!uACPI/source/**' \
 		':!uACPI/include/**' \
 		':!uACPI/tests/**' \
-		':!libk/printf*')
+		':!libk/printf*' \
+		':!lz4/lz4*')
 
 .PHONY: all clean format

kernel/device/device.c

@@ -13,6 +13,8 @@
 #include <libk/std.h>
 #include <libk/string.h>
 #include <limine/requests.h>
+#include <lz4/lz4.h>
+#include <lz4/lz4frame.h>
 #include <mm/liballoc.h>
 #include <status.h>
 #include <sync/spin_lock.h>
@@ -102,7 +104,7 @@ void ramdisk_device_init (void) {
 
   struct limine_module_response* module = limine_module_request.response;
 
-  const char* ramdisk_path = "/boot/mop3dist.tar";
+  const char* ramdisk_path = "/boot/mop3dist.tar.lz4";
   struct limine_file* file = NULL;
 
   for (size_t i = 0; i < module->module_count; i++) {
@@ -112,12 +114,26 @@ void ramdisk_device_init (void) {
       break;
   }
 
+  const size_t unpack_buffer_size = 1024 * 1024 * 20;
+  uint8_t* unpack_buffer = malloc (unpack_buffer_size);
+
+  LZ4F_decompressionContext_t dctx;
+
+  LZ4F_createDecompressionContext (&dctx, LZ4F_VERSION);
+
+  size_t consumed = file->size;
+  size_t produced = unpack_buffer_size;
+
+  LZ4F_decompress (dctx, unpack_buffer, &produced, file->address, &consumed, NULL);
+
   struct ramdrv_init init = {
-      .total_size = file->size,
+      .total_size = produced,
       .sector_size = 512,
-      .buffer = file->address,
+      .buffer = unpack_buffer,
   };
   device_create ("RD", ops, lengthof (ops), &ramdrv_init, &ramdrv_fini, &init);
+
+  LZ4F_freeDecompressionContext (dctx);
 }
 
 void temp_device_init (void) {

kernel/generic/flags.mk

@@ -12,7 +12,8 @@ cflags += -isystem . -isystem ../include
 
 cflags += -DPRINTF_INCLUDE_CONFIG_H=1 \
 					-D_ALLOC_SKIP_DEFINE \
-					-D"FAT_PRINTF(a)"
+					-D"FAT_PRINTF(a)" \
+					-DXXH_NAMESPACE=LZ4_
 
 ifeq ($(buildtype),debug)
 	cflags += -O0 -g

kernel/libk/assert.h

@@ -1,6 +1,7 @@
 #ifndef _KERNEL_LIBK_ASSERT_H
 #define _KERNEL_LIBK_ASSERT_H
 
+#include <sys/debug.h>
 #include <sys/spin.h>
 
 #define assert(x)                                                                                  \

kernel/libk/string.c

@@ -9,13 +9,13 @@ size_t memset (void* dst, uint8_t b, size_t n) {
   return i;
 }
 
-size_t memcpy (void* dst, const void* src, size_t n) {
+void* memcpy (void* dst, const void* src, size_t n) {
   uint8_t* dst1 = dst;
   const uint8_t* src1 = src;
   size_t i;
   for (i = 0; i < n; i++)
     dst1[i] = src1[i];
-  return i;
+  return dst;
 }
 
 // SOURCE: https://stackoverflow.com/a/48967408
@@ -92,3 +92,24 @@ char* strncat (char* dest, const char* src, size_t n) {
   *ptr = '\0';
   return dest;
 }
+
+void* memmove (void* dest, const void* src, unsigned int n) {
+  unsigned char isCopyRequire = 0; // flag bit
+  char* pcSource = (char*)src;
+  char* pcDstn = (char*)dest;
+  // return if pcDstn and pcSource is NULL
+  if ((pcSource == NULL) || (pcDstn == NULL)) {
+    return NULL;
+  }
+  // overlap buffer
+  if ((pcSource < pcDstn) && (pcDstn < pcSource + n)) {
+    for (pcDstn += n, pcSource += n; n--;) {
+      *--pcDstn = *--pcSource;
+    }
+  } else {
+    while (n--) {
+      *pcDstn++ = *pcSource++;
+    }
+  }
+  return dest;
+}

kernel/libk/string.h

@@ -4,14 +4,23 @@
 #include <libk/std.h>
 
 size_t memset (void* dst, uint8_t b, size_t n);
-size_t memcpy (void* dst, const void* src, size_t n);
+
+void* memcpy (void* dst, const void* src, size_t n);
+
 void strncpy (char* dst, const char* src, size_t n);
+
 size_t strlen (const char* str);
+
 int memcmp (const void* s1, const void* s2, size_t n);
+
 int strncmp (const char* s1, const char* s2, size_t n);
+
 int strcmp (const char* s1, const char* s2);
+
 char* strncat (char* dest, const char* src, size_t n);
 
+void* memmove (void* dest, const void* src, unsigned int n);
+
 #define strlen_null(x) (strlen ((x)) + 1)
 
 #endif // _KERNEL_LIBK_STRING_H

kernel/lz4/.gitignore

@@ -0,0 +1 @@
+*.o

kernel/lz4/lz4.h

@@ -0,0 +1,886 @@
+/*
+ *  LZ4 - Fast LZ compression algorithm
+ *  Header File
+ *  Copyright (c) Yann Collet. All rights reserved.
+
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+    - LZ4 homepage : http://www.lz4.org
+    - LZ4 source repository : https://github.com/lz4/lz4
+*/
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+#ifndef LZ4_H_2983827168210
+#define LZ4_H_2983827168210
+
+/* --- Dependency --- */
+#include <stddef.h>   /* size_t */
+
+
+/**
+  Introduction
+
+  LZ4 is lossless compression algorithm, providing compression speed >500 MB/s per core,
+  scalable with multi-cores CPU. It features an extremely fast decoder, with speed in
+  multiple GB/s per core, typically reaching RAM speed limits on multi-core systems.
+
+  The LZ4 compression library provides in-memory compression and decompression functions.
+  It gives full buffer control to user.
+  Compression can be done in:
+    - a single step (described as Simple Functions)
+    - a single step, reusing a context (described in Advanced Functions)
+    - unbounded multiple steps (described as Streaming compression)
+
+  lz4.h generates and decodes LZ4-compressed blocks (doc/lz4_Block_format.md).
+  Decompressing such a compressed block requires additional metadata.
+  Exact metadata depends on exact decompression function.
+  For the typical case of LZ4_decompress_safe(),
+  metadata includes block's compressed size, and maximum bound of decompressed size.
+  Each application is free to encode and pass such metadata in whichever way it wants.
+
+  lz4.h only handle blocks, it can not generate Frames.
+
+  Blocks are different from Frames (doc/lz4_Frame_format.md).
+  Frames bundle both blocks and metadata in a specified manner.
+  Embedding metadata is required for compressed data to be self-contained and portable.
+  Frame format is delivered through a companion API, declared in lz4frame.h.
+  The `lz4` CLI can only manage frames.
+*/
+
+/*^***************************************************************
+*  Export parameters
+*****************************************************************/
+/*
+*  LZ4_DLL_EXPORT :
+*  Enable exporting of functions when building a Windows DLL
+*  LZ4LIB_VISIBILITY :
+*  Control library symbols visibility.
+*/
+#ifndef LZ4LIB_VISIBILITY
+#  if defined(__GNUC__) && (__GNUC__ >= 4)
+#    define LZ4LIB_VISIBILITY __attribute__ ((visibility ("default")))
+#  else
+#    define LZ4LIB_VISIBILITY
+#  endif
+#endif
+#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
+#  define LZ4LIB_API __declspec(dllexport) LZ4LIB_VISIBILITY
+#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
+#  define LZ4LIB_API __declspec(dllimport) LZ4LIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
+#else
+#  define LZ4LIB_API LZ4LIB_VISIBILITY
+#endif
+
+/*! LZ4_FREESTANDING :
+ *  When this macro is set to 1, it enables "freestanding mode" that is
+ *  suitable for typical freestanding environment which doesn't support
+ *  standard C library.
+ *
+ *  - LZ4_FREESTANDING is a compile-time switch.
+ *  - It requires the following macros to be defined:
+ *    LZ4_memcpy, LZ4_memmove, LZ4_memset.
+ *  - It only enables LZ4/HC functions which don't use heap.
+ *    All LZ4F_* functions are not supported.
+ *  - See tests/freestanding.c to check its basic setup.
+ */
+#if defined(LZ4_FREESTANDING) && (LZ4_FREESTANDING == 1)
+#  define LZ4_HEAPMODE 0
+#  define LZ4HC_HEAPMODE 0
+#  define LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION 1
+#  if !defined(LZ4_memcpy)
+#    error "LZ4_FREESTANDING requires macro 'LZ4_memcpy'."
+#  endif
+#  if !defined(LZ4_memset)
+#    error "LZ4_FREESTANDING requires macro 'LZ4_memset'."
+#  endif
+#  if !defined(LZ4_memmove)
+#    error "LZ4_FREESTANDING requires macro 'LZ4_memmove'."
+#  endif
+#elif ! defined(LZ4_FREESTANDING)
+#  define LZ4_FREESTANDING 0
+#endif
+
+
+/*------   Version   ------*/
+#define LZ4_VERSION_MAJOR    1    /* for breaking interface changes  */
+#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)
+
+#define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
+#define LZ4_QUOTE(str) #str
+#define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
+#define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)  /* requires v1.7.3+ */
+
+LZ4LIB_API int LZ4_versionNumber (void);  /**< library version number; useful to check dll version; requires v1.3.0+ */
+LZ4LIB_API const char* LZ4_versionString (void);   /**< library version string; useful to check dll version; requires v1.7.5+ */
+
+
+/*-************************************
+*  Tuning memory usage
+**************************************/
+/*!
+ * LZ4_MEMORY_USAGE :
+ * 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 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
+
+#if (LZ4_MEMORY_USAGE > LZ4_MEMORY_USAGE_MAX)
+#  error "LZ4_MEMORY_USAGE is too large !"
+#endif
+
+/*-************************************
+*  Simple Functions
+**************************************/
+/*! LZ4_compress_default() :
+ *  Compresses 'srcSize' bytes from buffer 'src'
+ *  into already allocated 'dst' buffer of size 'dstCapacity'.
+ *  Compression is guaranteed to succeed if 'dstCapacity' >= LZ4_compressBound(srcSize).
+ *  It also runs faster, so it's a recommended setting.
+ *  If the function cannot compress 'src' into a more limited 'dst' budget,
+ *  compression stops *immediately*, and the function result is zero.
+ *  In which case, 'dst' content is undefined (invalid).
+ *      srcSize : max supported value is LZ4_MAX_INPUT_SIZE.
+ *      dstCapacity : size of buffer 'dst' (which must be already allocated)
+ *     @return  : the number of bytes written into buffer 'dst' (necessarily <= dstCapacity)
+ *                or 0 if compression fails
+ * Note : This function is protected against buffer overflow scenarios (never writes outside 'dst' buffer, nor read outside 'source' buffer).
+ */
+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.
+ * @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.
+ * Note 1 : This function is protected against malicious data packets :
+ *          it will never writes outside 'dst' buffer, nor read outside 'source' buffer,
+ *          even if the compressed block is maliciously modified to order the decoder to do these actions.
+ *          In such case, the decoder stops immediately, and considers the compressed block malformed.
+ * Note 2 : compressedSize and dstCapacity must be provided to the function, the compressed block does not contain them.
+ *          The implementation is free to send / store / derive this information in whichever way is most beneficial.
+ *          If there is a need for a different format which bundles together both compressed data and its metadata, consider looking at lz4frame.h instead.
+ */
+LZ4LIB_API int LZ4_decompress_safe (const char* src, char* dst, int compressedSize, int dstCapacity);
+
+
+/*-************************************
+*  Advanced Functions
+**************************************/
+#define LZ4_MAX_INPUT_SIZE        0x7E000000   /* 2 113 929 216 bytes */
+#define LZ4_COMPRESSBOUND(isize)  ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
+
+/*! LZ4_compressBound() :
+    Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
+    This function is primarily useful for memory allocation purposes (destination buffer size).
+    Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
+    Note that LZ4_compress_default() compresses faster when dstCapacity is >= LZ4_compressBound(srcSize)
+        inputSize  : max supported value is LZ4_MAX_INPUT_SIZE
+        return : maximum output size in a "worst case" scenario
+              or 0, if input size is incorrect (too large or negative)
+*/
+LZ4LIB_API int LZ4_compressBound(int inputSize);
+
+/*! LZ4_compress_fast() :
+    Same as LZ4_compress_default(), but allows selection of "acceleration" factor.
+    The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
+    It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
+    An acceleration value of "1" is the same as regular LZ4_compress_default()
+    Values <= 0 will be replaced by LZ4_ACCELERATION_DEFAULT (currently == 1, see lz4.c).
+    Values > LZ4_ACCELERATION_MAX will be replaced by LZ4_ACCELERATION_MAX (currently == 65537, see lz4.c).
+*/
+LZ4LIB_API int LZ4_compress_fast (const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
+
+
+/*! LZ4_compress_fast_extState() :
+ *  Same as LZ4_compress_fast(), using an externally allocated memory space for its state.
+ *  Use LZ4_sizeofState() to know how much memory must be allocated,
+ *  and allocate it on 8-bytes boundaries (using `malloc()` typically).
+ *  Then, provide this buffer as `void* state` to compression function.
+ */
+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 >= '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 : 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 <= dstCapacity)
+ *           or 0 if compression fails.
+ *
+ * Note : 'targetDstSize' must be >= 1, because it's the smallest valid lz4 payload.
+ *
+ * Note 2:from v1.8.2 to v1.9.1, this function had a bug (fixed in v1.9.2+):
+ *        the produced compressed content could, in rare circumstances,
+ *        require to be decompressed into a destination buffer
+ *        larger by at least 1 byte than decompressesSize.
+ *        If an application uses `LZ4_compress_destSize()`,
+ *        it's highly recommended to update liblz4 to v1.9.2 or better.
+ *        If this can't be done or ensured,
+ *        the receiving decompression function should provide
+ *        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);
+
+/*! LZ4_decompress_safe_partial() :
+ *  Decompress an LZ4 compressed block, of size 'srcSize' at position 'src',
+ *  into destination buffer 'dst' of size 'dstCapacity'.
+ *  Up to 'targetOutputSize' bytes will be decoded.
+ *  The function stops decoding on reaching this objective.
+ *  This can be useful to boost performance
+ *  whenever only the beginning of a block is required.
+ *
+ * @return : the number of bytes decoded in `dst` (necessarily <= targetOutputSize)
+ *           If source stream is detected malformed, function returns a negative result.
+ *
+ *  Note 1 : @return can be < targetOutputSize, if compressed block contains less data.
+ *
+ *  Note 2 : targetOutputSize must be <= dstCapacity
+ *
+ *  Note 3 : this function effectively stops decoding on reaching targetOutputSize,
+ *           so dstCapacity is kind of redundant.
+ *           This is because in older versions of this function,
+ *           decoding operation would still write complete sequences.
+ *           Therefore, there was no guarantee that it would stop writing at exactly targetOutputSize,
+ *           it could write more bytes, though only up to dstCapacity.
+ *           Some "margin" used to be required for this operation to work properly.
+ *           Thankfully, this is no longer necessary.
+ *           The function nonetheless keeps the same signature, in an effort to preserve API compatibility.
+ *
+ *  Note 4 : If srcSize is the exact size of the block,
+ *           then targetOutputSize can be any value,
+ *           including larger than the block's decompressed size.
+ *           The function will, at most, generate block's decompressed size.
+ *
+ *  Note 5 : If srcSize is _larger_ than block's compressed size,
+ *           then targetOutputSize **MUST** be <= block's decompressed size.
+ *           Otherwise, *silent corruption will occur*.
+ */
+LZ4LIB_API int LZ4_decompress_safe_partial (const char* src, char* dst, int srcSize, int targetOutputSize, int dstCapacity);
+
+
+/*-*********************************************
+*  Streaming Compression Functions
+***********************************************/
+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).
+   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".
+*/
+#if !defined(RC_INVOKED) /* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+LZ4LIB_API LZ4_stream_t* LZ4_createStream(void);
+LZ4LIB_API int           LZ4_freeStream (LZ4_stream_t* streamPtr);
+#endif /* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */
+#endif
+
+/*! LZ4_resetStream_fast() : v1.9.0+
+ *  Use this to prepare an LZ4_stream_t for a new chain of dependent blocks
+ *  (e.g., LZ4_compress_fast_continue()).
+ *
+ *  An LZ4_stream_t must be initialized once before usage.
+ *  This is automatically done when created by LZ4_createStream().
+ *  However, should the LZ4_stream_t be simply declared on stack (for example),
+ *  it's necessary to initialize it first, using LZ4_initStream().
+ *
+ *  After init, start any new stream with LZ4_resetStream_fast().
+ *  A same LZ4_stream_t can be re-used multiple times consecutively
+ *  and compress multiple streams,
+ *  provided that it starts each new stream with LZ4_resetStream_fast().
+ *
+ *  LZ4_resetStream_fast() is much faster than LZ4_initStream(),
+ *  but is not compatible with memory regions containing garbage data.
+ *
+ *  Note: it's only useful to call LZ4_resetStream_fast()
+ *        in the context of streaming compression.
+ *        The *extState* functions perform their own resets.
+ *        Invoking LZ4_resetStream_fast() before is redundant, and even counterproductive.
+ */
+LZ4LIB_API void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
+
+/*! LZ4_loadDict() :
+ *  Use this function to reference a static dictionary into LZ4_stream_t.
+ *  The dictionary must remain available during compression.
+ *  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 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 (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.
+ *  If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
+ *
+ * @return : size of compressed block
+ *           or 0 if there is an error (typically, cannot fit into 'dst').
+ *
+ *  Note 1 : Each invocation to LZ4_compress_fast_continue() generates a new block.
+ *           Each block has precise boundaries.
+ *           Each block must be decompressed separately, calling LZ4_decompress_*() with relevant metadata.
+ *           It's not possible to append blocks together and expect a single invocation of LZ4_decompress_*() to decompress them together.
+ *
+ *  Note 2 : The previous 64KB of source data is __assumed__ to remain present, unmodified, at same address in memory !
+ *
+ *  Note 3 : When input is structured as a double-buffer, each buffer can have any size, including < 64 KB.
+ *           Make sure that buffers are separated, by at least one byte.
+ *           This construction ensures that each block only depends on previous block.
+ *
+ *  Note 4 : If input buffer is a ring-buffer, it can have any size, including < 64 KB.
+ *
+ *  Note 5 : After an error, the stream status is undefined (invalid), it can only be reset or freed.
+ */
+LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
+
+/*! LZ4_saveDict() :
+ *  If last 64KB data cannot be guaranteed to remain available at its current memory location,
+ *  save it into a safer place (char* safeBuffer).
+ *  This is schematically equivalent to a memcpy() followed by LZ4_loadDict(),
+ *  but is much faster, because LZ4_saveDict() doesn't need to rebuild tables.
+ * @return : saved dictionary size in bytes (necessarily <= maxDictSize), or 0 if error.
+ */
+LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int maxDictSize);
+
+
+/*-**********************************************
+*  Streaming Decompression Functions
+*  Bufferless synchronous API
+************************************************/
+typedef union LZ4_streamDecode_u LZ4_streamDecode_t;   /* tracking context */
+
+/*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
+ *  creation / destruction of streaming decompression tracking context.
+ *  A tracking context can be re-used multiple times.
+ */
+#if !defined(RC_INVOKED) /* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+LZ4LIB_API LZ4_streamDecode_t* LZ4_createStreamDecode(void);
+LZ4LIB_API int                 LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
+#endif /* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */
+#endif
+
+/*! LZ4_setStreamDecode() :
+ *  An LZ4_streamDecode_t context can be allocated once and re-used multiple times.
+ *  Use this function to start decompression of a new stream of blocks.
+ *  A dictionary can optionally be set. Use NULL or size 0 for a reset order.
+ *  Dictionary is presumed stable : it must remain accessible and unmodified during next decompression.
+ * @return : 1 if OK, 0 if error
+ */
+LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
+
+/*! LZ4_decoderRingBufferSize() : v1.8.2+
+ *  Note : in a ring buffer scenario (optional),
+ *  blocks are presumed decompressed next to each other
+ *  up to the moment there is not enough remaining space for next block (remainingSize < maxBlockSize),
+ *  at which stage it resumes from beginning of ring buffer.
+ *  When setting such a ring buffer for streaming decompression,
+ *  provides the minimum size of this ring buffer
+ *  to be compatible with any source respecting maxBlockSize condition.
+ * @return : minimum ring buffer size,
+ *           or 0 if there is an error (invalid maxBlockSize).
+ */
+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_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 :
+ *  - Decompression buffer size is _at least_ LZ4_decoderRingBufferSize(maxBlockSize).
+ *    maxBlockSize is the maximum size of any single block. It can have any value > 16 bytes.
+ *    In which case, encoding and decoding buffers do not need to be synchronized.
+ *    Actually, data can be produced by any source compliant with LZ4 format specification, and respecting maxBlockSize.
+ *  - Synchronized mode :
+ *    Decompression buffer size is _exactly_ the same as compression buffer size,
+ *    and follows exactly same update rule (block boundaries at same positions),
+ *    and decoding function is provided with exact decompressed size of each block (exception for last block of the stream),
+ *    _then_ decoding & encoding ring buffer can have any size, including small ones ( < 64 KB).
+ *  - Decompression buffer is larger than encoding buffer, by a minimum of maxBlockSize more bytes.
+ *    In which case, encoding and decoding buffers do not need to be synchronized,
+ *    and encoding ring buffer can have any size, including small ones ( < 64 KB).
+ *
+ *  Whenever these conditions are not possible,
+ *  save the last 64KB of decoded data into a safe buffer where it can't be modified during decompression,
+ *  then indicate where this data is saved using LZ4_setStreamDecode(), before decompressing next block.
+*/
+LZ4LIB_API int
+LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
+                        const char* src, char* dst,
+                        int srcSize, int dstCapacity);
+
+
+/*! 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.
+ */
+LZ4LIB_API int
+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,
+                                      int targetOutputSize, int maxOutputSize,
+                                      const char* dictStart, int dictSize);
+
+#endif /* LZ4_H_2983827168210 */
+
+
+/*^*************************************
+ * !!!!!!   STATIC LINKING ONLY   !!!!!!
+ ***************************************/
+
+/*-****************************************************************************
+ * Experimental section
+ *
+ * Symbols declared in this section must be considered unstable. Their
+ * signatures or semantics may change, or they may be removed altogether in the
+ * future. They are therefore only safe to depend on when the caller is
+ * statically linked against the library.
+ *
+ * To protect against unsafe usage, not only are the declarations guarded,
+ * the definitions are hidden by default
+ * when building LZ4 as a shared/dynamic library.
+ *
+ * In order to access these declarations,
+ * define LZ4_STATIC_LINKING_ONLY in your application
+ * before including LZ4's headers.
+ *
+ * In order to make their implementations accessible dynamically, you must
+ * define LZ4_PUBLISH_STATIC_FUNCTIONS when building the LZ4 library.
+ ******************************************************************************/
+
+#ifdef LZ4_STATIC_LINKING_ONLY
+
+#ifndef LZ4_STATIC_3504398509
+#define LZ4_STATIC_3504398509
+
+#ifdef LZ4_PUBLISH_STATIC_FUNCTIONS
+# define LZ4LIB_STATIC_API LZ4LIB_API
+#else
+# define LZ4LIB_STATIC_API
+#endif
+
+
+/*! LZ4_compress_fast_extState_fastReset() :
+ *  A variant of LZ4_compress_fast_extState().
+ *
+ *  Using this variant avoids an expensive initialization step.
+ *  It is only safe to call if the state buffer is known to be correctly initialized already
+ *  (see above comment on LZ4_resetStream_fast() for a definition of "correctly initialized").
+ *  From a high level, the difference is that
+ *  this function initializes the provided state with a call to something like LZ4_resetStream_fast()
+ *  while LZ4_compress_fast_extState() starts with a call to LZ4_resetStream().
+ */
+LZ4LIB_STATIC_API int LZ4_compress_fast_extState_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
+
+/*! LZ4_compress_destSize_extState() : introduced in v1.10.0
+ *  Same as LZ4_compress_destSize(), but using an externally allocated state.
+ *  Also: exposes @acceleration
+ */
+int LZ4_compress_destSize_extState(void* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration);
+
+/*! In-place compression and decompression
+ *
+ * It's possible to have input and output sharing the same buffer,
+ * for highly constrained memory environments.
+ * In both cases, it requires input to lay at the end of the buffer,
+ * and decompression to start at beginning of the buffer.
+ * Buffer size must feature some margin, hence be larger than final size.
+ *
+ * |<------------------------buffer--------------------------------->|
+ *                             |<-----------compressed data--------->|
+ * |<-----------decompressed size------------------>|
+ *                                                  |<----margin---->|
+ *
+ * This technique is more useful for decompression,
+ * since decompressed size is typically larger,
+ * and margin is short.
+ *
+ * In-place decompression will work inside any buffer
+ * which size is >= LZ4_DECOMPRESS_INPLACE_BUFFER_SIZE(decompressedSize).
+ * This presumes that decompressedSize > compressedSize.
+ * Otherwise, it means compression actually expanded data,
+ * and it would be more efficient to store such data with a flag indicating it's not compressed.
+ * This can happen when data is not compressible (already compressed, or encrypted).
+ *
+ * For in-place compression, margin is larger, as it must be able to cope with both
+ * history preservation, requiring input data to remain unmodified up to LZ4_DISTANCE_MAX,
+ * and data expansion, which can happen when input is not compressible.
+ * As a consequence, buffer size requirements are much higher,
+ * and memory savings offered by in-place compression are more limited.
+ *
+ * There are ways to limit this cost for compression :
+ * - Reduce history size, by modifying LZ4_DISTANCE_MAX.
+ *   Note that it is a compile-time constant, so all compressions will apply this limit.
+ *   Lower values will reduce compression ratio, except when input_size < LZ4_DISTANCE_MAX,
+ *   so it's a reasonable trick when inputs are known to be small.
+ * - Require the compressor to deliver a "maximum compressed size".
+ *   This is the `dstCapacity` parameter in `LZ4_compress*()`.
+ *   When this size is < LZ4_COMPRESSBOUND(inputSize), then compression can fail,
+ *   in which case, the return code will be 0 (zero).
+ *   The caller must be ready for these cases to happen,
+ *   and typically design a backup scheme to send data uncompressed.
+ * The combination of both techniques can significantly reduce
+ * the amount of margin required for in-place compression.
+ *
+ * In-place compression can work in any buffer
+ * which size is >= (maxCompressedSize)
+ * with maxCompressedSize == LZ4_COMPRESSBOUND(srcSize) for guaranteed compression success.
+ * LZ4_COMPRESS_INPLACE_BUFFER_SIZE() depends on both maxCompressedSize and LZ4_DISTANCE_MAX,
+ * so it's possible to reduce memory requirements by playing with them.
+ */
+
+#define LZ4_DECOMPRESS_INPLACE_MARGIN(compressedSize)          (((compressedSize) >> 8) + 32)
+#define LZ4_DECOMPRESS_INPLACE_BUFFER_SIZE(decompressedSize)   ((decompressedSize) + LZ4_DECOMPRESS_INPLACE_MARGIN(decompressedSize))  /**< note: presumes that compressedSize < decompressedSize. note2: margin is overestimated a bit, since it could use compressedSize instead */
+
+#ifndef LZ4_DISTANCE_MAX   /* history window size; can be user-defined at compile time */
+#  define LZ4_DISTANCE_MAX 65535   /* set to maximum value by default */
+#endif
+
+#define LZ4_COMPRESS_INPLACE_MARGIN                           (LZ4_DISTANCE_MAX + 32)   /* LZ4_DISTANCE_MAX can be safely replaced by srcSize when it's smaller */
+#define LZ4_COMPRESS_INPLACE_BUFFER_SIZE(maxCompressedSize)   ((maxCompressedSize) + LZ4_COMPRESS_INPLACE_MARGIN)  /**< maxCompressedSize is generally LZ4_COMPRESSBOUND(inputSize), but can be set to any lower value, with the risk that compression can fail (return code 0(zero)) */
+
+#endif   /* LZ4_STATIC_3504398509 */
+#endif   /* LZ4_STATIC_LINKING_ONLY */
+
+
+
+#ifndef LZ4_H_98237428734687
+#define LZ4_H_98237428734687
+
+/*-************************************************************
+ *  Private Definitions
+ **************************************************************
+ * Do not use these definitions directly.
+ * They are only exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
+ * Accessing members will expose user code to API and/or ABI break in future versions of the library.
+ **************************************************************/
+#define LZ4_HASHLOG   (LZ4_MEMORY_USAGE-2)
+#define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
+#define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG)       /* required as macro for static allocation */
+
+#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
+# include <stdint.h>
+  typedef int8_t         LZ4_i8;
+  typedef unsigned char  LZ4_byte;
+  typedef uint16_t       LZ4_u16;
+  typedef uint32_t       LZ4_u32;
+#else
+  typedef   signed char  LZ4_i8;
+  typedef unsigned char  LZ4_byte;
+  typedef unsigned short LZ4_u16;
+  typedef unsigned int   LZ4_u32;
+#endif
+
+/*! LZ4_stream_t :
+ *  Never ever use below internal definitions directly !
+ *  These definitions are not API/ABI safe, and may change in future versions.
+ *  If you need static allocation, declare or allocate an LZ4_stream_t object.
+**/
+
+typedef struct LZ4_stream_t_internal LZ4_stream_t_internal;
+struct LZ4_stream_t_internal {
+    LZ4_u32 hashTable[LZ4_HASH_SIZE_U32];
+    const LZ4_byte* dictionary;
+    const LZ4_stream_t_internal* dictCtx;
+    LZ4_u32 currentOffset;
+    LZ4_u32 tableType;
+    LZ4_u32 dictSize;
+    /* Implicit padding to ensure structure is aligned */
+};
+
+#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;
+}; /* previously typedef'd to LZ4_stream_t */
+
+
+/*! LZ4_initStream() : v1.9.0+
+ *  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).
+ *
+ *  Use LZ4_initStream() to properly initialize a newly declared LZ4_stream_t.
+ *  It can also initialize any arbitrary buffer of sufficient size,
+ *  and will @return a pointer of proper type upon initialization.
+ *
+ *  Note : initialization fails if size and alignment conditions are not respected.
+ *         In which case, the function will @return NULL.
+ *  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* stateBuffer, size_t size);
+
+
+/*! LZ4_streamDecode_t :
+ *  Never ever use below internal definitions directly !
+ *  These definitions are not API/ABI safe, and may change in future versions.
+ *  If you need static allocation, declare or allocate an LZ4_streamDecode_t object.
+**/
+typedef struct {
+    const LZ4_byte* externalDict;
+    const LZ4_byte* prefixEnd;
+    size_t extDictSize;
+    size_t prefixSize;
+} LZ4_streamDecode_t_internal;
+
+#define LZ4_STREAMDECODE_MINSIZE 32
+union LZ4_streamDecode_u {
+    char minStateSize[LZ4_STREAMDECODE_MINSIZE];
+    LZ4_streamDecode_t_internal internal_donotuse;
+} ;   /* previously typedef'd to LZ4_streamDecode_t */
+
+
+
+/*-************************************
+*  Obsolete Functions
+**************************************/
+
+/*! Deprecation warnings
+ *
+ *  Deprecated functions make the compiler generate a warning when invoked.
+ *  This is meant to invite users to update their source code.
+ *  Should deprecation warnings be a problem, it is generally possible to disable them,
+ *  typically with -Wno-deprecated-declarations for gcc
+ *  or _CRT_SECURE_NO_WARNINGS in Visual.
+ *
+ *  Another method is to define LZ4_DISABLE_DEPRECATE_WARNINGS
+ *  before including the header file.
+ */
+#ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
+#  define LZ4_DEPRECATED(message)   /* disable deprecation warnings */
+#else
+#  if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
+#    define LZ4_DEPRECATED(message) [[deprecated(message)]]
+#  elif defined(_MSC_VER)
+#    define LZ4_DEPRECATED(message) __declspec(deprecated(message))
+#  elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ * 10 + __GNUC_MINOR__ >= 45))
+#    define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
+#  elif defined(__GNUC__) && (__GNUC__ * 10 + __GNUC_MINOR__ >= 31)
+#    define LZ4_DEPRECATED(message) __attribute__((deprecated))
+#  else
+#    pragma message("WARNING: LZ4_DEPRECATED needs custom implementation for this compiler")
+#    define LZ4_DEPRECATED(message)   /* disabled */
+#  endif
+#endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
+
+/*! Obsolete compression functions (since v1.7.3) */
+LZ4_DEPRECATED("use LZ4_compress_default() instead")       LZ4LIB_API int LZ4_compress               (const char* src, char* dest, int srcSize);
+LZ4_DEPRECATED("use LZ4_compress_default() instead")       LZ4LIB_API int LZ4_compress_limitedOutput (const char* src, char* dest, int srcSize, int maxOutputSize);
+LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") LZ4LIB_API int LZ4_compress_withState               (void* state, const char* source, char* dest, int inputSize);
+LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") LZ4LIB_API int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
+LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") LZ4LIB_API int LZ4_compress_continue                (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
+LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") LZ4LIB_API int LZ4_compress_limitedOutput_continue  (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
+
+/*! Obsolete decompression functions (since v1.8.0) */
+LZ4_DEPRECATED("use LZ4_decompress_fast() instead") LZ4LIB_API int LZ4_uncompress (const char* source, char* dest, int outputSize);
+LZ4_DEPRECATED("use LZ4_decompress_safe() instead") LZ4LIB_API int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
+
+/* Obsolete streaming functions (since v1.7.0)
+ * degraded functionality; do not use!
+ *
+ * In order to perform streaming compression, these functions depended on data
+ * that is no longer tracked in the state. They have been preserved as well as
+ * possible: using them will still produce a correct output. However, they don't
+ * actually retain any history between compression calls. The compression ratio
+ * achieved will therefore be no better than compressing each chunk
+ * independently.
+ */
+LZ4_DEPRECATED("Use LZ4_createStream() instead") LZ4LIB_API void* LZ4_create (char* inputBuffer);
+LZ4_DEPRECATED("Use LZ4_createStream() instead") LZ4LIB_API int   LZ4_sizeofStreamState(void);
+LZ4_DEPRECATED("Use LZ4_resetStream() instead")  LZ4LIB_API int   LZ4_resetStreamState(void* state, char* inputBuffer);
+LZ4_DEPRECATED("Use LZ4_saveDict() instead")     LZ4LIB_API char* LZ4_slideInputBuffer (void* state);
+
+/*! Obsolete streaming decoding functions (since v1.7.0) */
+LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") LZ4LIB_API int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
+LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") LZ4LIB_API int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
+
+/*! Obsolete LZ4_decompress_fast variants (since v1.9.0) :
+ *  These functions used to be faster than LZ4_decompress_safe(),
+ *  but this is no longer the case. They are now slower.
+ *  This is because LZ4_decompress_fast() doesn't know the input size,
+ *  and therefore must progress more cautiously into the input buffer to not read beyond the end of block.
+ *  On top of that `LZ4_decompress_fast()` is not protected vs malformed or malicious inputs, making it a security liability.
+ *  As a consequence, LZ4_decompress_fast() is strongly discouraged, and deprecated.
+ *
+ *  The last remaining LZ4_decompress_fast() specificity is that
+ *  it can decompress a block without knowing its compressed size.
+ *  Such functionality can be achieved in a more secure manner
+ *  by employing LZ4_decompress_safe_partial().
+ *
+ *  Parameters:
+ *  originalSize : is the uncompressed size to regenerate.
+ *                 `dst` must be already allocated, its size must be >= 'originalSize' bytes.
+ * @return : number of bytes read from source buffer (== compressed size).
+ *           The function expects to finish at block's end exactly.
+ *           If the source stream is detected malformed, the function stops decoding and returns a negative result.
+ *  note : LZ4_decompress_fast*() requires originalSize. Thanks to this information, it never writes past the output buffer.
+ *         However, since it doesn't know its 'src' size, it may read an unknown amount of input, past input buffer bounds.
+ *         Also, since match offsets are not validated, match reads from 'src' may underflow too.
+ *         These issues never happen if input (compressed) data is correct.
+ *         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_partial() instead")
+LZ4LIB_API int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
+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_partial_usingDict() instead")
+LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize, const char* dictStart, int dictSize);
+
+/*! LZ4_resetStream() :
+ *  An LZ4_stream_t structure must be initialized at least once.
+ *  This is done with LZ4_initStream(), or LZ4_resetStream().
+ *  Consider switching to LZ4_initStream(),
+ *  invoking LZ4_resetStream() will trigger deprecation warnings in the future.
+ */
+LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
+
+
+#endif /* LZ4_H_98237428734687 */
+
+
+#if defined (__cplusplus)
+}
+#endif

kernel/lz4/lz4frame.h

@@ -0,0 +1,771 @@
+/*
+   LZ4F - LZ4-Frame library
+   Header File
+   Copyright (c) Yann Collet. All rights reserved.
+
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+   - LZ4 source repository : https://github.com/lz4/lz4
+   - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+
+/* LZ4F is a stand-alone API able to create and decode LZ4 frames
+ * conformant with specification v1.6.1 in doc/lz4_Frame_format.md .
+ * Generated frames are compatible with `lz4` CLI.
+ *
+ * LZ4F also offers streaming capabilities.
+ *
+ * lz4.h is not required when using lz4frame.h,
+ * except to extract common constants such as LZ4_VERSION_NUMBER.
+ * */
+
+#ifndef LZ4F_H_09782039843
+#define LZ4F_H_09782039843
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/* ---   Dependency   --- */
+#include <stddef.h>   /* size_t */
+
+
+/**
+ * Introduction
+ *
+ * lz4frame.h implements LZ4 frame specification: see doc/lz4_Frame_format.md .
+ * LZ4 Frames are compatible with `lz4` CLI,
+ * and designed to be interoperable with any system.
+**/
+
+/*-***************************************************************
+ *  Compiler specifics
+ *****************************************************************/
+/*  LZ4_DLL_EXPORT :
+ *  Enable exporting of functions when building a Windows DLL
+ *  LZ4FLIB_VISIBILITY :
+ *  Control library symbols visibility.
+ */
+#ifndef LZ4FLIB_VISIBILITY
+#  if defined(__GNUC__) && (__GNUC__ >= 4)
+#    define LZ4FLIB_VISIBILITY __attribute__ ((visibility ("default")))
+#  else
+#    define LZ4FLIB_VISIBILITY
+#  endif
+#endif
+#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
+#  define LZ4FLIB_API __declspec(dllexport) LZ4FLIB_VISIBILITY
+#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
+#  define LZ4FLIB_API __declspec(dllimport) LZ4FLIB_VISIBILITY
+#else
+#  define LZ4FLIB_API LZ4FLIB_VISIBILITY
+#endif
+
+#ifdef LZ4F_DISABLE_DEPRECATE_WARNINGS
+#  define LZ4F_DEPRECATE(x) x
+#else
+#  if defined(_MSC_VER)
+#    define LZ4F_DEPRECATE(x) x   /* __declspec(deprecated) x - only works with C++ */
+#  elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ >= 6))
+#    define LZ4F_DEPRECATE(x) x __attribute__((deprecated))
+#  else
+#    define LZ4F_DEPRECATE(x) x   /* no deprecation warning for this compiler */
+#  endif
+#endif
+
+
+/*-************************************
+ *  Error management
+ **************************************/
+typedef size_t LZ4F_errorCode_t;
+
+LZ4FLIB_API unsigned    LZ4F_isError(LZ4F_errorCode_t code);   /**< tells when a function result is an error code */
+LZ4FLIB_API const char* LZ4F_getErrorName(LZ4F_errorCode_t code);   /**< return error code string; for debugging */
+
+
+/*-************************************
+ *  Frame compression types
+ ************************************* */
+/* #define LZ4F_ENABLE_OBSOLETE_ENUMS   // uncomment to enable obsolete enums */
+#ifdef LZ4F_ENABLE_OBSOLETE_ENUMS
+#  define LZ4F_OBSOLETE_ENUM(x) , LZ4F_DEPRECATE(x) = LZ4F_##x
+#else
+#  define LZ4F_OBSOLETE_ENUM(x)
+#endif
+
+/* The larger the block size, the (slightly) better the compression ratio,
+ * though there are diminishing returns.
+ * Larger blocks also increase memory usage on both compression and decompression sides.
+ */
+typedef enum {
+    LZ4F_default=0,
+    LZ4F_max64KB=4,
+    LZ4F_max256KB=5,
+    LZ4F_max1MB=6,
+    LZ4F_max4MB=7
+    LZ4F_OBSOLETE_ENUM(max64KB)
+    LZ4F_OBSOLETE_ENUM(max256KB)
+    LZ4F_OBSOLETE_ENUM(max1MB)
+    LZ4F_OBSOLETE_ENUM(max4MB)
+} LZ4F_blockSizeID_t;
+
+/* Linked blocks sharply reduce inefficiencies when using small blocks,
+ * they compress better.
+ * However, some LZ4 decoders are only compatible with independent blocks */
+typedef enum {
+    LZ4F_blockLinked=0,
+    LZ4F_blockIndependent
+    LZ4F_OBSOLETE_ENUM(blockLinked)
+    LZ4F_OBSOLETE_ENUM(blockIndependent)
+} LZ4F_blockMode_t;
+
+typedef enum {
+    LZ4F_noContentChecksum=0,
+    LZ4F_contentChecksumEnabled
+    LZ4F_OBSOLETE_ENUM(noContentChecksum)
+    LZ4F_OBSOLETE_ENUM(contentChecksumEnabled)
+} LZ4F_contentChecksum_t;
+
+typedef enum {
+    LZ4F_noBlockChecksum=0,
+    LZ4F_blockChecksumEnabled
+} LZ4F_blockChecksum_t;
+
+typedef enum {
+    LZ4F_frame=0,
+    LZ4F_skippableFrame
+    LZ4F_OBSOLETE_ENUM(skippableFrame)
+} LZ4F_frameType_t;
+
+#ifdef LZ4F_ENABLE_OBSOLETE_ENUMS
+typedef LZ4F_blockSizeID_t blockSizeID_t;
+typedef LZ4F_blockMode_t blockMode_t;
+typedef LZ4F_frameType_t frameType_t;
+typedef LZ4F_contentChecksum_t contentChecksum_t;
+#endif
+
+/*! LZ4F_frameInfo_t :
+ *  makes it possible to set or read frame parameters.
+ *  Structure must be first init to 0, using memset() or LZ4F_INIT_FRAMEINFO,
+ *  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_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 == default (disabled) */
+} LZ4F_frameInfo_t;
+
+#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.
+ *  Structure must be first init to 0, using memset() or LZ4F_INIT_PREFERENCES,
+ *  setting all parameters to default.
+ *  All reserved fields must be set to zero. */
+typedef struct {
+  LZ4F_frameInfo_t frameInfo;
+  int      compressionLevel;    /* 0: default (fast mode); values > LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values < 0 trigger "fast acceleration" */
+  unsigned autoFlush;           /* 1: always flush; reduces usage of internal buffers */
+  unsigned favorDecSpeed;       /* 1: parser favors decompression speed vs compression ratio. Only works for high compression modes (>= LZ4HC_CLEVEL_OPT_MIN) */  /* v1.8.2+ */
+  unsigned reserved[3];         /* must be zero for forward compatibility */
+} LZ4F_preferences_t;
+
+#define LZ4F_INIT_PREFERENCES   { LZ4F_INIT_FRAMEINFO, 0, 0u, 0u, { 0u, 0u, 0u } }    /* v1.8.3+ */
+
+
+/*-*********************************
+*  Simple compression function
+***********************************/
+
+/*! 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.
+ * `preferencesPtr` is optional. It can be replaced by NULL, in which case, the function will assume default preferences.
+ *  Note : this result is only usable with LZ4F_compressFrame().
+ *         It may also be relevant to LZ4F_compressUpdate() _only if_ no flush() operation is ever performed.
+ */
+LZ4FLIB_API size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr);
+
+
+/*! LZ4F_compressionLevel_max() :
+ * @return maximum allowed compression level (currently: 12)
+ */
+LZ4FLIB_API int LZ4F_compressionLevel_max(void);   /* v1.8.0+ */
+
+
+/*-***********************************
+*  Advanced compression functions
+*************************************/
+typedef struct LZ4F_cctx_s LZ4F_cctx;   /* incomplete type */
+typedef LZ4F_cctx* LZ4F_compressionContext_t;  /* for compatibility with older APIs, prefer using LZ4F_cctx */
+
+typedef struct {
+  unsigned stableSrc;    /* 1 == src content will remain present on future calls to LZ4F_compress(); skip copying src content within tmp buffer */
+  unsigned reserved[3];
+} LZ4F_compressOptions_t;
+
+/*---   Resource Management   ---*/
+
+#define LZ4F_VERSION 100    /* This number can be used to check for an incompatible API breaking change */
+LZ4FLIB_API unsigned LZ4F_getVersion(void);
+
+/*! LZ4F_createCompressionContext() :
+ *  The first thing to do is to create a compressionContext object,
+ *  which will keep track of operation state during streaming compression.
+ *  This is achieved using LZ4F_createCompressionContext(), which takes as argument a version,
+ *  and a pointer to LZ4F_cctx*, to write the resulting pointer into.
+ *  @version provided MUST be LZ4F_VERSION. It is intended to track potential version mismatch, notably when using DLL.
+ *  The function provides a pointer to a fully allocated LZ4F_cctx object.
+ *  @cctxPtr MUST be != NULL.
+ *  If @return != zero, context creation failed.
+ *  A created compression context can be employed multiple times for consecutive streaming operations.
+ *  Once all streaming compression jobs are completed,
+ *  the state object can be released using LZ4F_freeCompressionContext().
+ *  Note1 : LZ4F_freeCompressionContext() is always successful. Its return value can be ignored.
+ *  Note2 : LZ4F_freeCompressionContext() works fine with NULL input pointers (do nothing).
+**/
+LZ4FLIB_API LZ4F_errorCode_t LZ4F_createCompressionContext(LZ4F_cctx** cctxPtr, unsigned version);
+LZ4FLIB_API LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
+
+
+/*----    Compression    ----*/
+
+#define LZ4F_HEADER_SIZE_MIN  7   /* LZ4 Frame header size can vary, depending on selected parameters */
+#define LZ4F_HEADER_SIZE_MAX 19
+
+/* Size in bytes of a block header in little-endian format. Highest bit indicates if block data is uncompressed */
+#define LZ4F_BLOCK_HEADER_SIZE 4
+
+/* Size in bytes of a block checksum footer in little-endian format. */
+#define LZ4F_BLOCK_CHECKSUM_SIZE 4
+
+/* Size in bytes of the content checksum. */
+#define LZ4F_CONTENT_CHECKSUM_SIZE 4
+
+/* Size in bytes of the endmark. */
+#define LZ4F_ENDMARK_SIZE 4
+
+/*! LZ4F_compressBegin() :
+ *  will write the frame header into dstBuffer.
+ *  dstCapacity must be >= LZ4F_HEADER_SIZE_MAX bytes.
+ * `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())
+ */
+LZ4FLIB_API size_t LZ4F_compressBegin(LZ4F_cctx* cctx,
+                                      void* dstBuffer, size_t dstCapacity,
+                                      const LZ4F_preferences_t* prefsPtr);
+
+/*! LZ4F_compressBound() :
+ *  Provides minimum dstCapacity required to guarantee success of
+ *  LZ4F_compressUpdate(), given a srcSize and preferences, for a worst case scenario.
+ *  When srcSize==0, LZ4F_compressBound() provides an upper bound for LZ4F_flush() and LZ4F_compressEnd() instead.
+ *  Note that the result is only valid for a single invocation of LZ4F_compressUpdate().
+ *  When invoking LZ4F_compressUpdate() multiple times,
+ *  if the output buffer is gradually filled up instead of emptied and re-used from its start,
+ *  one must check if there is enough remaining capacity before each invocation, using LZ4F_compressBound().
+ * @return is always the same for a srcSize and prefsPtr.
+ *  prefsPtr is optional : when NULL is provided, preferences will be set to cover worst case scenario.
+ *  tech details :
+ * @return if automatic flushing is not enabled, includes the possibility that internal buffer might already be filled by up to (blockSize-1) bytes.
+ *  It also includes frame footer (ending + checksum), since it might be generated by LZ4F_compressEnd().
+ * @return doesn't include frame header, as it was already generated by LZ4F_compressBegin().
+ */
+LZ4FLIB_API size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t* prefsPtr);
+
+/*! LZ4F_compressUpdate() :
+ *  LZ4F_compressUpdate() can be called repetitively to compress as much data as necessary.
+ *  Important rule: dstCapacity MUST be large enough to ensure operation success even in worst case situations.
+ *  This value is provided by LZ4F_compressBound().
+ *  If this condition is not respected, LZ4F_compress() 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 an uncompressed block was written, buffered data is flushed
+ *  before appending compressed data is continued.
+ * `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())
+ */
+LZ4FLIB_API size_t LZ4F_compressUpdate(LZ4F_cctx* cctx,
+                                       void* dstBuffer, size_t dstCapacity,
+                                 const void* srcBuffer, size_t srcSize,
+                                 const LZ4F_compressOptions_t* cOptPtr);
+
+/*! LZ4F_flush() :
+ *  When data must be generated and sent immediately, without waiting for a block to be completely filled,
+ *  it's possible to call LZ4_flush(). It will immediately compress any data buffered within cctx.
+ * `dstCapacity` must be large enough to ensure the operation will be successful.
+ * `cOptPtr` is optional : it's possible to provide NULL, all options will be set to default.
+ * @return : nb of bytes written into dstBuffer (can be zero, when there is no data stored within cctx)
+ *           or an error code if it fails (which can be tested using LZ4F_isError())
+ *  Note : LZ4F_flush() is guaranteed to be successful when dstCapacity >= LZ4F_compressBound(0, prefsPtr).
+ */
+LZ4FLIB_API size_t LZ4F_flush(LZ4F_cctx* cctx,
+                              void* dstBuffer, size_t dstCapacity,
+                        const LZ4F_compressOptions_t* cOptPtr);
+
+/*! LZ4F_compressEnd() :
+ *  To properly finish an LZ4 frame, invoke LZ4F_compressEnd().
+ *  It will flush whatever data remained within `cctx` (like LZ4_flush())
+ *  and properly finalize the frame, with an endMark and a checksum.
+ * `cOptPtr` is optional : NULL can be provided, in which case all options will be set to default.
+ * @return : nb of bytes written into dstBuffer, necessarily >= 4 (endMark),
+ *           or an error code if it fails (which can be tested using LZ4F_isError())
+ *  Note : LZ4F_compressEnd() is guaranteed to be successful when dstCapacity >= LZ4F_compressBound(0, prefsPtr).
+ *  A successful call to LZ4F_compressEnd() makes `cctx` available again for another compression task.
+ */
+LZ4FLIB_API size_t LZ4F_compressEnd(LZ4F_cctx* cctx,
+                                    void* dstBuffer, size_t dstCapacity,
+                              const LZ4F_compressOptions_t* cOptPtr);
+
+
+/*-*********************************
+*  Decompression functions
+***********************************/
+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 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 */
+  unsigned reserved0;     /* idem */
+} LZ4F_decompressOptions_t;
+
+
+/* Resource management */
+
+/*! LZ4F_createDecompressionContext() :
+ *  Create an LZ4F_dctx object, to track all decompression operations.
+ *  @version provided MUST be LZ4F_VERSION.
+ *  @dctxPtr MUST be valid.
+ *  The function fills @dctxPtr with the value of a pointer to an allocated and initialized LZ4F_dctx object.
+ *  The @return is an errorCode, which can be tested using LZ4F_isError().
+ *  dctx memory can be released using LZ4F_freeDecompressionContext();
+ *  Result of LZ4F_freeDecompressionContext() indicates current state of decompressionContext when being released.
+ *  That is, it should be == 0 if decompression has been completed fully and correctly.
+ */
+LZ4FLIB_API LZ4F_errorCode_t LZ4F_createDecompressionContext(LZ4F_dctx** dctxPtr, unsigned version);
+LZ4FLIB_API LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_dctx* dctx);
+
+
+/*-***********************************
+*  Streaming decompression functions
+*************************************/
+
+#define LZ4F_MAGICNUMBER 0x184D2204U
+#define LZ4F_MAGIC_SKIPPABLE_START 0x184D2A50U
+#define LZ4F_MIN_SIZE_TO_KNOW_HEADER_LENGTH 5
+
+/*! LZ4F_headerSize() : v1.9.0+
+ *  Provide the header size of a frame starting at `src`.
+ * `srcSize` must be >= LZ4F_MIN_SIZE_TO_KNOW_HEADER_LENGTH,
+ *  which is enough to decode the header length.
+ * @return : size of frame header
+ *           or an error code, which can be tested using LZ4F_isError()
+ *  note : Frame header size is variable, but is guaranteed to be
+ *         >= LZ4F_HEADER_SIZE_MIN bytes, and <= LZ4F_HEADER_SIZE_MAX bytes.
+ */
+LZ4FLIB_API size_t LZ4F_headerSize(const void* src, size_t srcSize);
+
+/*! LZ4F_getFrameInfo() :
+ *  This function extracts frame parameters (max blockSize, dictID, etc.).
+ *  Its usage is optional: user can also invoke LZ4F_decompress() directly.
+ *
+ *  Extracted information will fill an existing LZ4F_frameInfo_t structure.
+ *  This can be useful for allocation and dictionary identification purposes.
+ *
+ *  LZ4F_getFrameInfo() can work in the following situations :
+ *
+ *  1) At the beginning of a new frame, before any invocation of LZ4F_decompress().
+ *     It will decode header from `srcBuffer`,
+ *     consuming the header and starting the decoding process.
+ *
+ *     Input size must be large enough to contain the full frame header.
+ *     Frame header size can be known beforehand by LZ4F_headerSize().
+ *     Frame header size is variable, but is guaranteed to be >= LZ4F_HEADER_SIZE_MIN bytes,
+ *     and not more than <= LZ4F_HEADER_SIZE_MAX bytes.
+ *     Hence, blindly providing LZ4F_HEADER_SIZE_MAX bytes or more will always work.
+ *     It's allowed to provide more input data than the header size,
+ *     LZ4F_getFrameInfo() will only consume the header.
+ *
+ *     If input size is not large enough,
+ *     aka if it's smaller than header size,
+ *     function will fail and return an error code.
+ *
+ *  2) After decoding has been started,
+ *     it's possible to invoke LZ4F_getFrameInfo() anytime
+ *     to extract already decoded frame parameters stored within dctx.
+ *
+ *     Note that, if decoding has barely started,
+ *     and not yet read enough information to decode the header,
+ *     LZ4F_getFrameInfo() will fail.
+ *
+ *  The number of bytes consumed from srcBuffer will be updated in *srcSizePtr (necessarily <= original value).
+ *  LZ4F_getFrameInfo() only consumes bytes when decoding has not yet started,
+ *  and when decoding the header has been successful.
+ *  Decompression must then resume from (srcBuffer + *srcSizePtr).
+ *
+ * @return : a hint about how many srcSize bytes LZ4F_decompress() expects for next call,
+ *           or an error code which can be tested using LZ4F_isError().
+ *  note 1 : in case of error, dctx is not modified. Decoding operation can resume from beginning safely.
+ *  note 2 : frame parameters are *copied into* an already allocated LZ4F_frameInfo_t structure.
+ */
+LZ4FLIB_API size_t
+LZ4F_getFrameInfo(LZ4F_dctx* dctx,
+                  LZ4F_frameInfo_t* frameInfoPtr,
+            const void* srcBuffer, size_t* srcSizePtr);
+
+/**
+ * @brief Incrementally decompresses an LZ4 frame into user-provided buffers.
+ *
+ * Call repeatedly until the return value is 0 (frame fully decoded) or an error is reported.
+ * On each call, the function consumes up to *srcSizePtr bytes from @p srcBuffer and
+ * produces up to *dstSizePtr bytes into @p dstBuffer. It updates both size pointers with
+ * the actual number of bytes consumed/produced. There is no separate flush step.
+ *
+ * Typical loop:
+ *  - Provide whatever input you have and an available output buffer.
+ *  - Read how much input was consumed and how much output was produced.
+ *  - Use the returned value as a hint for how many source bytes are ideal next time.
+ *
+ * @param[in]      dctx        A valid decompression context created by LZ4F_createDecompressionContext().
+ * @param[out]     dstBuffer   Destination buffer for decompressed bytes. May change between calls.
+ * @param[in,out]  dstSizePtr  In: capacity of @p dstBuffer in bytes. Out: number of bytes written (<= input value).
+ * @param[in]      srcBuffer   Source buffer containing (more) compressed data. May point to the middle of a larger buffer.
+ * @param[in,out]  srcSizePtr  In: number of available bytes in @p srcBuffer. Out: number of bytes consumed (<= input value).
+ * @param[in]      optionsPtr  Optional decompression options; pass NULL for defaults.
+ *
+ * @return See @retval cases.
+ * @retval >0  Hint (in bytes) for how many source bytes are ideal to provide on the next call.
+ *             This also indicates the current frame is not yet complete: the decompressor
+ *             expects more input, or may require additional output space to make progress. 
+ *             User can always pass any amount of input; this value is only a performance hint.
+ * @retval 0   The current frame is fully decoded. If *srcSizePtr is less than the provided value, 
+ *             the unconsumed tail is the start of another frame (if any).
+ * @retval error  An error code; test with LZ4F_isError(ret). After an error, dctx is not
+ *                resumable: call LZ4F_resetDecompressionContext() before reusing it.
+ *
+ * @pre  @p dctx is a valid state created by LZ4F_createDecompressionContext().
+ * @post *srcSizePtr and *dstSizePtr are updated with the actual bytes consumed/produced.
+ *       @p dstBuffer contents in [0, *dstSizePtr) are valid decompressed data.
+ *
+ * @note  The function may not consume all provided input on each call. Always check *srcSizePtr.
+ *        Present any unconsumed source bytes again on the next call.
+ * @note  @p dstBuffer content is overwritten; it does not need to be stable across calls.
+ * @note  After finishing a frame (return==0), you may immediately start feeding the next frame
+ *        into the same @p dctx (optionally, one can use LZ4F_resetDecompressionContext()).
+ *
+ * @warning If you called LZ4F_getFrameInfo() beforehand, you must advance @p srcBuffer and
+ *          decrease *srcSizePtr by the number of bytes it consumed (the frame header). Failing
+ *          to do so can cause decompression failure or, worse, silent corruption.
+ *
+ * @see LZ4F_getFrameInfo(), LZ4F_isError(), LZ4F_resetDecompressionContext(),
+ *      LZ4F_createDecompressionContext(), LZ4F_freeDecompressionContext()
+ */
+LZ4FLIB_API size_t
+LZ4F_decompress(LZ4F_dctx* dctx,
+                void* dstBuffer, size_t* dstSizePtr,
+          const void* srcBuffer, size_t* srcSizePtr,
+          const LZ4F_decompressOptions_t* dOptPtr);
+
+
+/*! LZ4F_resetDecompressionContext() : added in v1.8.0
+ *  In case of an error, the context is left in "undefined" state.
+ *  In which case, it's necessary to reset it, before re-using it.
+ *  This method can also be used to abruptly stop any unfinished decompression,
+ *  and start a new one using same context resources. */
+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)
+}
+#endif
+
+#endif  /* LZ4F_H_09782039843 */
+
+#if defined(LZ4F_STATIC_LINKING_ONLY) && !defined(LZ4F_H_STATIC_09782039843)
+#define LZ4F_H_STATIC_09782039843
+
+/* 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.
+ *
+ * By default, these symbols aren't published into shared/dynamic libraries.
+ * You can override this behavior and force them to be published
+ * 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
+# define LZ4FLIB_STATIC_API
+#endif
+
+
+/* ---   Error List   --- */
+#define LZ4F_LIST_ERRORS(ITEM) \
+        ITEM(OK_NoError) \
+        ITEM(ERROR_GENERIC) \
+        ITEM(ERROR_maxBlockSize_invalid) \
+        ITEM(ERROR_blockMode_invalid) \
+        ITEM(ERROR_parameter_invalid) \
+        ITEM(ERROR_compressionLevel_invalid) \
+        ITEM(ERROR_headerVersion_wrong) \
+        ITEM(ERROR_blockChecksum_invalid) \
+        ITEM(ERROR_reservedFlag_set) \
+        ITEM(ERROR_allocation_failed) \
+        ITEM(ERROR_srcSize_tooLarge) \
+        ITEM(ERROR_dstMaxSize_tooSmall) \
+        ITEM(ERROR_frameHeader_incomplete) \
+        ITEM(ERROR_frameType_unknown) \
+        ITEM(ERROR_frameSize_wrong) \
+        ITEM(ERROR_srcPtr_wrong) \
+        ITEM(ERROR_decompressionFailed) \
+        ITEM(ERROR_headerChecksum_invalid) \
+        ITEM(ERROR_contentChecksum_invalid) \
+        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,
+
+/* enum list is exposed, to handle specific errors */
+typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM)
+              _LZ4F_dummy_error_enum_for_c89_never_used } LZ4F_errorCodes;
+
+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,
+ *          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 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())
+ */
+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);
+
+/**********************************
+ *  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.
+ */
+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);
+typedef struct {
+    LZ4F_AllocFunction customAlloc;
+    LZ4F_CallocFunction customCalloc; /* optional; when not defined, uses customAlloc + memset */
+    LZ4F_FreeFunction customFree;
+    void* opaqueState;
+} LZ4F_CustomMem;
+static
+#ifdef __GNUC__
+__attribute__((__unused__))
+#endif
+LZ4F_CustomMem const LZ4F_defaultCMem = { NULL, NULL, NULL, NULL };  /**< this constant defers to stdlib's functions */
+
+LZ4FLIB_STATIC_API LZ4F_cctx* LZ4F_createCompressionContext_advanced(LZ4F_CustomMem customMem, unsigned version);
+LZ4FLIB_STATIC_API LZ4F_dctx* LZ4F_createDecompressionContext_advanced(LZ4F_CustomMem customMem, unsigned version);
+LZ4FLIB_STATIC_API LZ4F_CDict* LZ4F_createCDict_advanced(LZ4F_CustomMem customMem, const void* dictBuffer, size_t dictSize);
+
+/*! Context size inspection : v1.10.1+
+ *  These functions return the total memory footprint of the provided context.
+ */
+LZ4FLIB_STATIC_API size_t LZ4F_cctx_size(const LZ4F_cctx* cctx);
+LZ4FLIB_STATIC_API size_t LZ4F_dctx_size(const LZ4F_dctx* dctx);
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif  /* defined(LZ4F_STATIC_LINKING_ONLY) && !defined(LZ4F_H_STATIC_09782039843) */

kernel/lz4/lz4hc.h

@@ -0,0 +1,421 @@
+/*
+   LZ4 HC - High Compression Mode of LZ4
+   Header File
+   Copyright (c) Yann Collet. All rights reserved.
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+   - LZ4 source repository : https://github.com/lz4/lz4
+   - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+#ifndef LZ4_HC_H_19834876238432
+#define LZ4_HC_H_19834876238432
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/* --- Dependency --- */
+/* note : lz4hc requires lz4.h/lz4.c for compilation */
+#include "lz4.h"   /* stddef, LZ4LIB_API, LZ4_DEPRECATED */
+
+
+/* --- Useful constants --- */
+#define LZ4HC_CLEVEL_MIN         2
+#define LZ4HC_CLEVEL_DEFAULT     9
+#define LZ4HC_CLEVEL_OPT_MIN    10
+#define LZ4HC_CLEVEL_MAX        12
+
+
+/*-************************************
+ *  Block Compression
+ **************************************/
+/*! LZ4_compress_HC() :
+ *  Compress data from `src` into `dst`, using the powerful but slower "HC" algorithm.
+ * `dst` must be already allocated.
+ *  Compression is guaranteed to succeed if `dstCapacity >= LZ4_compressBound(srcSize)` (see "lz4.h")
+ *  Max supported `srcSize` value is LZ4_MAX_INPUT_SIZE (see "lz4.h")
+ * `compressionLevel` : any value between 1 and LZ4HC_CLEVEL_MAX will work.
+ *                      Values > LZ4HC_CLEVEL_MAX behave the same as LZ4HC_CLEVEL_MAX.
+ * @return : the number of bytes written into 'dst'
+ *           or 0 if compression fails.
+ */
+LZ4LIB_API int LZ4_compress_HC (const char* src, char* dst, int srcSize, int dstCapacity, int compressionLevel);
+
+
+/* Note :
+ *   Decompression functions are provided within "lz4.h" (BSD license)
+ */
+
+
+/*! LZ4_compress_HC_extStateHC() :
+ *  Same as LZ4_compress_HC(), but using an externally allocated memory segment for `state`.
+ * `state` size is provided by LZ4_sizeofStateHC().
+ *  Memory segment must be aligned on 8-bytes boundaries (which a normal malloc() should do properly).
+ */
+LZ4LIB_API int LZ4_sizeofStateHC(void);
+LZ4LIB_API int LZ4_compress_HC_extStateHC(void* stateHC, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
+
+
+/*! LZ4_compress_HC_destSize() : v1.9.0+
+ *  Will compress as much data as possible from `src`
+ *  to fit into `targetDstSize` budget.
+ *  Result is provided in 2 parts :
+ * @return : the number of bytes written into 'dst' (necessarily <= targetDstSize)
+ *           or 0 if compression fails.
+ * `srcSizePtr` : on success, *srcSizePtr is updated to indicate how much bytes were read from `src`
+ */
+LZ4LIB_API int LZ4_compress_HC_destSize(void* stateHC,
+                                  const char* src, char* dst,
+                                        int* srcSizePtr, int targetDstSize,
+                                        int compressionLevel);
+
+
+/*-************************************
+ *  Streaming Compression
+ *  Bufferless synchronous API
+ **************************************/
+ typedef union LZ4_streamHC_u LZ4_streamHC_t;   /* incomplete type (defined later) */
+
+/*! LZ4_createStreamHC() and LZ4_freeStreamHC() :
+ *  These functions create and release memory for LZ4 HC streaming state.
+ *  Newly created states are automatically initialized.
+ *  A same state can be used multiple times consecutively,
+ *  starting with LZ4_resetStreamHC_fast() to start a new stream of blocks.
+ */
+LZ4LIB_API LZ4_streamHC_t* LZ4_createStreamHC(void);
+LZ4LIB_API int             LZ4_freeStreamHC (LZ4_streamHC_t* streamHCPtr);
+
+/*
+  These functions compress data in successive blocks of any size,
+  using previous blocks as dictionary, to improve compression ratio.
+  One key assumption is that previous blocks (up to 64 KB) remain read-accessible while compressing next blocks.
+  There is an exception for ring buffers, which can be smaller than 64 KB.
+  Ring-buffer scenario is automatically detected and handled within LZ4_compress_HC_continue().
+
+  Before starting compression, state must be allocated and properly initialized.
+  LZ4_createStreamHC() does both, though compression level is set to LZ4HC_CLEVEL_DEFAULT.
+
+  Selecting the compression level can be done with LZ4_resetStreamHC_fast() (starts a new stream)
+  or LZ4_setCompressionLevel() (anytime, between blocks in the same stream) (experimental).
+  LZ4_resetStreamHC_fast() only works on states which have been properly initialized at least once,
+  which is automatically the case when state is created using LZ4_createStreamHC().
+
+  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.
+  Previous input blocks, including initial dictionary when present,
+  must remain accessible and unmodified during compression.
+
+  It's allowed to update compression level anytime between blocks,
+  using LZ4_setCompressionLevel() (experimental).
+
+ @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(),
+  consider using LZ4_compress_HC_continue_destSize().
+
+  Whenever previous input blocks can't be preserved unmodified in-place during compression of next blocks,
+  it's possible to copy the last blocks into a more stable memory space, using LZ4_saveDictHC().
+  Return value of LZ4_saveDictHC() is the size of dictionary effectively saved into 'safeBuffer' (<= 64 KB)
+
+  After completing a streaming compression,
+  it's possible to start a new stream of blocks, using the same LZ4_streamHC_t state,
+  just by resetting it, using LZ4_resetStreamHC_fast().
+*/
+
+LZ4LIB_API void LZ4_resetStreamHC_fast(LZ4_streamHC_t* streamHCPtr, int compressionLevel);   /* v1.9.0+ */
+LZ4LIB_API int  LZ4_loadDictHC (LZ4_streamHC_t* streamHCPtr, const char* dictionary, int dictSize);
+
+LZ4LIB_API int LZ4_compress_HC_continue (LZ4_streamHC_t* streamHCPtr,
+                                   const char* src, char* dst,
+                                         int srcSize, int maxDstSize);
+
+/*! LZ4_compress_HC_continue_destSize() : v1.9.0+
+ *  Similar to LZ4_compress_HC_continue(),
+ *  but will read as much data as possible from `src`
+ *  to fit into `targetDstSize` budget.
+ *  Result is provided into 2 parts :
+ * @return : the number of bytes written into 'dst' (necessarily <= targetDstSize)
+ *           or 0 if compression fails.
+ * `srcSizePtr` : on success, *srcSizePtr will be updated to indicate how much bytes were read from `src`.
+ *           Note that this function may not consume the entire input.
+ */
+LZ4LIB_API int LZ4_compress_HC_continue_destSize(LZ4_streamHC_t* LZ4_streamHCPtr,
+                                           const char* src, char* dst,
+                                                 int* srcSizePtr, int targetDstSize);
+
+/*! LZ4_saveDictHC():
+ * save history content (up to 64 KB) into a user-provided buffer @param safeBuffer.
+ * @return value is the size of dictionary effectively saved (<= MIN(maxDictSize, 64 KB)).
+ * This function is always successful, and expects its arguments to be valid.
+ * To this end, let's remind that (NULL,0) is valid, 
+ * but (NULL,!0) is not, and will result in a segfault (or assert() depending on compilation mode).
+ */
+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   !!!!!!
+ ***********************************************/
+
+/*-******************************************************************
+ * PRIVATE DEFINITIONS :
+ * Do not use these definitions directly.
+ * They are merely exposed to allow static allocation of `LZ4_streamHC_t`.
+ * Declare an `LZ4_streamHC_t` directly, rather than any type below.
+ * Even then, only do so in the context of static linking, as definitions may change between versions.
+ ********************************************************************/
+
+#define LZ4HC_DICTIONARY_LOGSIZE 16
+#define LZ4HC_MAXD (1<<LZ4HC_DICTIONARY_LOGSIZE)
+#define LZ4HC_MAXD_MASK (LZ4HC_MAXD - 1)
+
+#define LZ4HC_HASH_LOG 15
+#define LZ4HC_HASHTABLESIZE (1 << LZ4HC_HASH_LOG)
+#define LZ4HC_HASH_MASK (LZ4HC_HASHTABLESIZE - 1)
+
+
+/* Never ever use these definitions directly !
+ * Declare or allocate an LZ4_streamHC_t instead.
+**/
+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 */
+    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 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;
+};
+
+#define LZ4_STREAMHC_MINSIZE  262200  /* static size, for inter-version compatibility */
+union LZ4_streamHC_u {
+    char minStateSize[LZ4_STREAMHC_MINSIZE];
+    LZ4HC_CCtx_internal internal_donotuse;
+}; /* previously typedef'd to LZ4_streamHC_t */
+
+/* LZ4_streamHC_t :
+ * This structure allows static allocation of LZ4 HC streaming state.
+ * This can be used to allocate statically on stack, or as part of a larger structure.
+ *
+ * Such state **must** be initialized using LZ4_initStreamHC() before first use.
+ *
+ * Note that invoking LZ4_initStreamHC() is not required when
+ * the state was created using LZ4_createStreamHC() (which is recommended).
+ * Using the normal builder, a newly created state is automatically initialized.
+ *
+ * Static allocation shall only be used in combination with static linking.
+ */
+
+/* LZ4_initStreamHC() : v1.9.0+
+ * Required before first use of a statically allocated LZ4_streamHC_t.
+ * Before v1.9.0 : use LZ4_resetStreamHC() instead
+ */
+LZ4LIB_API LZ4_streamHC_t* LZ4_initStreamHC(void* buffer, size_t size);
+
+
+/*-************************************
+*  Deprecated Functions
+**************************************/
+/* see lz4.h LZ4_DISABLE_DEPRECATE_WARNINGS to turn off deprecation warnings */
+
+/* deprecated compression functions */
+LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC               (const char* source, char* dest, int inputSize);
+LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
+LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2              (const char* source, char* dest, int inputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC_withStateHC               (void* state, const char* source, char* dest, int inputSize);
+LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
+LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC2_withStateHC              (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput_withStateHC(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_continue               (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize);
+LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
+
+/* Obsolete streaming functions; degraded functionality; do not use!
+ *
+ * In order to perform streaming compression, these functions depended on data
+ * that is no longer tracked in the state. They have been preserved as well as
+ * possible: using them will still produce a correct output. However, use of
+ * LZ4_slideInputBufferHC() will truncate the history of the stream, rather
+ * than preserve a window-sized chunk of history.
+ */
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API void* LZ4_createHC (const char* inputBuffer);
+LZ4_DEPRECATED("use LZ4_freeStreamHC() instead") LZ4LIB_API   int   LZ4_freeHC (void* LZ4HC_Data);
+#endif
+LZ4_DEPRECATED("use LZ4_saveDictHC() instead") LZ4LIB_API     char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
+LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_continue               (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
+LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API int   LZ4_sizeofStreamStateHC(void);
+LZ4_DEPRECATED("use LZ4_initStreamHC() instead") LZ4LIB_API  int   LZ4_resetStreamStateHC(void* state, char* inputBuffer);
+
+
+/* LZ4_resetStreamHC() is now replaced by LZ4_initStreamHC().
+ * The intention is to emphasize the difference with LZ4_resetStreamHC_fast(),
+ * which is now the recommended function to start a new stream of blocks,
+ * but cannot be used to initialize a memory segment containing arbitrary garbage data.
+ *
+ * It is recommended to switch to LZ4_initStreamHC().
+ * LZ4_resetStreamHC() will generate deprecation warnings in a future version.
+ */
+LZ4LIB_API void LZ4_resetStreamHC (LZ4_streamHC_t* streamHCPtr, int compressionLevel);
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* LZ4_HC_H_19834876238432 */
+
+
+/*-**************************************************
+ * !!!!!     STATIC LINKING ONLY     !!!!!
+ * Following definitions are considered experimental.
+ * They should not be linked from DLL,
+ * as there is no guarantee of API stability yet.
+ * Prototypes will be promoted to "stable" status
+ * after successful usage in real-life scenarios.
+ ***************************************************/
+#ifdef LZ4_HC_STATIC_LINKING_ONLY   /* protection macro */
+#ifndef LZ4_HC_SLO_098092834
+#define LZ4_HC_SLO_098092834
+
+#define LZ4_STATIC_LINKING_ONLY   /* LZ4LIB_STATIC_API */
+#include "lz4.h"
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/*! LZ4_setCompressionLevel() : v1.8.0+ (experimental)
+ *  It's possible to change compression level
+ *  between successive invocations of LZ4_compress_HC_continue*()
+ *  for dynamic adaptation.
+ */
+LZ4LIB_STATIC_API void LZ4_setCompressionLevel(
+    LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
+
+/*! LZ4_favorDecompressionSpeed() : v1.8.2+ (experimental)
+ *  Opt. Parser will favor decompression speed over compression ratio.
+ *  Only applicable to levels >= LZ4HC_CLEVEL_OPT_MIN.
+ */
+LZ4LIB_STATIC_API void LZ4_favorDecompressionSpeed(
+    LZ4_streamHC_t* LZ4_streamHCPtr, int favor);
+
+/*! LZ4_resetStreamHC_fast() : v1.9.0+
+ *  When an LZ4_streamHC_t is known to be in a internally coherent state,
+ *  it can often be prepared for a new compression with almost no work, only
+ *  sometimes falling back to the full, expensive reset that is always required
+ *  when the stream is in an indeterminate state (i.e., the reset performed by
+ *  LZ4_resetStreamHC()).
+ *
+ *  LZ4_streamHCs are guaranteed to be in a valid state when:
+ *  - returned from LZ4_createStreamHC()
+ *  - reset by LZ4_resetStreamHC()
+ *  - memset(stream, 0, sizeof(LZ4_streamHC_t))
+ *  - the stream was in a valid state and was reset by LZ4_resetStreamHC_fast()
+ *  - the stream was in a valid state and was then used in any compression call
+ *    that returned success
+ *  - the stream was in an indeterminate state and was used in a compression
+ *    call that fully reset the state (LZ4_compress_HC_extStateHC()) and that
+ *    returned success
+ *
+ *  Note:
+ *  A stream that was last used in a compression call that returned an error
+ *  may be passed to this function. However, it will be fully reset, which will
+ *  clear any existing history and settings from the context.
+ */
+LZ4LIB_STATIC_API void LZ4_resetStreamHC_fast(
+    LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
+
+/*! LZ4_compress_HC_extStateHC_fastReset() :
+ *  A variant of LZ4_compress_HC_extStateHC().
+ *
+ *  Using this variant avoids an expensive initialization step. It is only safe
+ *  to call if the state buffer is known to be correctly initialized already
+ *  (see above comment on LZ4_resetStreamHC_fast() for a definition of
+ *  "correctly initialized"). From a high level, the difference is that this
+ *  function initializes the provided state with a call to
+ *  LZ4_resetStreamHC_fast() while LZ4_compress_HC_extStateHC() starts with a
+ *  call to LZ4_resetStreamHC().
+ */
+LZ4LIB_STATIC_API int LZ4_compress_HC_extStateHC_fastReset (
+    void* state,
+    const char* src, char* dst,
+    int srcSize, int dstCapacity,
+    int compressionLevel);
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif   /* LZ4_HC_SLO_098092834 */
+#endif   /* LZ4_HC_STATIC_LINKING_ONLY */

kernel/lz4/src.mk

@@ -0,0 +1,9 @@
+c += lz4/lz4.c \
+		 lz4/lz4frame.c \
+		 lz4/lz4hc.c \
+		 lz4/xxhash.c
+
+o += lz4/lz4.o \
+		 lz4/lz4frame.o \
+		 lz4/lz4hc.o \
+		 lz4/xxhash.o

kernel/lz4/xxhash.h

@@ -0,0 +1,330 @@
+/*
+   xxHash - Extremely Fast Hash algorithm
+   Header File
+   Copyright (C) 2012-2016, Yann Collet.
+
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+   - xxHash source repository : https://github.com/Cyan4973/xxHash
+*/
+
+/* Notice extracted from xxHash homepage :
+
+xxHash is an extremely fast Hash algorithm, running at RAM speed limits.
+It also successfully passes all tests from the SMHasher suite.
+
+Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz)
+
+Name            Speed       Q.Score   Author
+xxHash          5.4 GB/s     10
+CrapWow         3.2 GB/s      2       Andrew
+MumurHash 3a    2.7 GB/s     10       Austin Appleby
+SpookyHash      2.0 GB/s     10       Bob Jenkins
+SBox            1.4 GB/s      9       Bret Mulvey
+Lookup3         1.2 GB/s      9       Bob Jenkins
+SuperFastHash   1.2 GB/s      1       Paul Hsieh
+CityHash64      1.05 GB/s    10       Pike & Alakuijala
+FNV             0.55 GB/s     5       Fowler, Noll, Vo
+CRC32           0.43 GB/s     9
+MD5-32          0.33 GB/s    10       Ronald L. Rivest
+SHA1-32         0.28 GB/s    10
+
+Q.Score is a measure of quality of the hash function.
+It depends on successfully passing SMHasher test set.
+10 is a perfect score.
+
+A 64-bit version, named XXH64, is available since r35.
+It offers much better speed, but for 64-bit applications only.
+Name     Speed on 64 bits    Speed on 32 bits
+XXH64       13.8 GB/s            1.9 GB/s
+XXH32        6.8 GB/s            6.0 GB/s
+*/
+
+#ifndef XXHASH_H_5627135585666179
+#define XXHASH_H_5627135585666179 1
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* ****************************
+ *  Definitions
+ ******************************/
+#include <stddef.h> /* size_t */
+typedef enum { XXH_OK = 0, XXH_ERROR } XXH_errorcode;
+
+/* ****************************
+ *  API modifier
+ ******************************/
+/** XXH_INLINE_ALL (and XXH_PRIVATE_API)
+ *  This is useful to include xxhash functions in `static` mode
+ *  in order to inline them, and remove their symbol from the public list.
+ *  Inlining can offer dramatic performance improvement on small keys.
+ *  Methodology :
+ *     #define XXH_INLINE_ALL
+ *     #include "xxhash.h"
+ * `xxhash.c` is automatically included.
+ *  It's not useful to compile and link it as a separate module.
+ */
+#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
+#ifndef XXH_STATIC_LINKING_ONLY
+#define XXH_STATIC_LINKING_ONLY
+#endif
+#if defined(__GNUC__)
+#define XXH_PUBLIC_API static __inline __attribute__ ((unused))
+#elif defined(__cplusplus) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99   \
+                                                                                           */)
+#define XXH_PUBLIC_API static inline
+#elif defined(_MSC_VER)
+#define XXH_PUBLIC_API static __inline
+#else
+/* this version may generate warnings for unused static functions */
+#define XXH_PUBLIC_API static
+#endif
+#else
+#define XXH_PUBLIC_API /* do nothing */
+#endif                 /* XXH_INLINE_ALL || XXH_PRIVATE_API */
+
+/*! XXH_NAMESPACE, aka Namespace Emulation :
+ *
+ * If you want to include _and expose_ xxHash functions from within your own library,
+ * but also want to avoid symbol collisions with other libraries which may also include xxHash,
+ *
+ * you can use XXH_NAMESPACE, to automatically prefix any public symbol from xxhash library
+ * with the value of XXH_NAMESPACE (therefore, avoid NULL and numeric values).
+ *
+ * Note that no change is required within the calling program as long as it includes `xxhash.h` :
+ * regular symbol name will be automatically translated by this header.
+ */
+#ifdef XXH_NAMESPACE
+#define XXH_CAT(A, B)           A##B
+#define XXH_NAME2(A, B)         XXH_CAT (A, B)
+#define XXH_versionNumber       XXH_NAME2 (XXH_NAMESPACE, XXH_versionNumber)
+#define XXH32                   XXH_NAME2 (XXH_NAMESPACE, XXH32)
+#define XXH32_createState       XXH_NAME2 (XXH_NAMESPACE, XXH32_createState)
+#define XXH32_freeState         XXH_NAME2 (XXH_NAMESPACE, XXH32_freeState)
+#define XXH32_reset             XXH_NAME2 (XXH_NAMESPACE, XXH32_reset)
+#define XXH32_update            XXH_NAME2 (XXH_NAMESPACE, XXH32_update)
+#define XXH32_digest            XXH_NAME2 (XXH_NAMESPACE, XXH32_digest)
+#define XXH32_copyState         XXH_NAME2 (XXH_NAMESPACE, XXH32_copyState)
+#define XXH32_canonicalFromHash XXH_NAME2 (XXH_NAMESPACE, XXH32_canonicalFromHash)
+#define XXH32_hashFromCanonical XXH_NAME2 (XXH_NAMESPACE, XXH32_hashFromCanonical)
+#define XXH64                   XXH_NAME2 (XXH_NAMESPACE, XXH64)
+#define XXH64_createState       XXH_NAME2 (XXH_NAMESPACE, XXH64_createState)
+#define XXH64_freeState         XXH_NAME2 (XXH_NAMESPACE, XXH64_freeState)
+#define XXH64_reset             XXH_NAME2 (XXH_NAMESPACE, XXH64_reset)
+#define XXH64_update            XXH_NAME2 (XXH_NAMESPACE, XXH64_update)
+#define XXH64_digest            XXH_NAME2 (XXH_NAMESPACE, XXH64_digest)
+#define XXH64_copyState         XXH_NAME2 (XXH_NAMESPACE, XXH64_copyState)
+#define XXH64_canonicalFromHash XXH_NAME2 (XXH_NAMESPACE, XXH64_canonicalFromHash)
+#define XXH64_hashFromCanonical XXH_NAME2 (XXH_NAMESPACE, XXH64_hashFromCanonical)
+#endif
+
+/* *************************************
+ *  Version
+ ***************************************/
+#define XXH_VERSION_MAJOR   0
+#define XXH_VERSION_MINOR   6
+#define XXH_VERSION_RELEASE 5
+#define XXH_VERSION_NUMBER                                                                         \
+  (XXH_VERSION_MAJOR * 100 * 100 + XXH_VERSION_MINOR * 100 + XXH_VERSION_RELEASE)
+XXH_PUBLIC_API unsigned XXH_versionNumber (void);
+
+/*-**********************************************************************
+ *  32-bit hash
+ ************************************************************************/
+typedef unsigned int XXH32_hash_t;
+
+/*! XXH32() :
+    Calculate the 32-bit hash of sequence "length" bytes stored at memory address "input".
+    The memory between input & input+length must be valid (allocated and read-accessible).
+    "seed" can be used to alter the result predictably.
+    Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s */
+XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t length, unsigned int seed);
+
+/*======   Streaming   ======*/
+typedef struct XXH32_state_s XXH32_state_t; /* incomplete type */
+XXH_PUBLIC_API XXH32_state_t* XXH32_createState (void);
+XXH_PUBLIC_API XXH_errorcode XXH32_freeState (XXH32_state_t* statePtr);
+XXH_PUBLIC_API void XXH32_copyState (XXH32_state_t* dst_state, const XXH32_state_t* src_state);
+
+XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, unsigned int seed);
+XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input,
+                                           size_t length);
+XXH_PUBLIC_API XXH32_hash_t XXH32_digest (const XXH32_state_t* statePtr);
+
+/*
+ * Streaming functions generate the xxHash of an input provided in multiple segments.
+ * Note that, for small input, they are slower than single-call functions, due to state management.
+ * For small inputs, prefer `XXH32()` and `XXH64()`, which are better optimized.
+ *
+ * XXH state must first be allocated, using XXH*_createState() .
+ *
+ * Start a new hash by initializing state with a seed, using XXH*_reset().
+ *
+ * Then, feed the hash state by calling XXH*_update() as many times as necessary.
+ * The function returns an error code, with 0 meaning OK, and any other value meaning there is an
+ * error.
+ *
+ * Finally, a hash value can be produced anytime, by using XXH*_digest().
+ * This function returns the nn-bits hash as an int or long long.
+ *
+ * It's still possible to continue inserting input into the hash state after a digest,
+ * and generate some new hashes later on, by calling again XXH*_digest().
+ *
+ * When done, free XXH state space if it was allocated dynamically.
+ */
+
+/*======   Canonical representation   ======*/
+
+typedef struct {
+  unsigned char digest[4];
+} XXH32_canonical_t;
+XXH_PUBLIC_API void XXH32_canonicalFromHash (XXH32_canonical_t* dst, XXH32_hash_t hash);
+XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical (const XXH32_canonical_t* src);
+
+/* Default result type for XXH functions are primitive unsigned 32 and 64 bits.
+ * The canonical representation uses human-readable write convention, aka big-endian (large digits
+ * first). These functions allow transformation of hash result into and from its canonical format.
+ * This way, hash values can be written into a file / memory, and remain comparable on different
+ * systems and programs.
+ */
+
+#ifndef XXH_NO_LONG_LONG
+/*-**********************************************************************
+ *  64-bit hash
+ ************************************************************************/
+typedef unsigned long long XXH64_hash_t;
+
+/*! XXH64() :
+    Calculate the 64-bit hash of sequence of length "len" stored at memory address "input".
+    "seed" can be used to alter the result predictably.
+    This function runs faster on 64-bit systems, but slower on 32-bit systems (see benchmark).
+*/
+XXH_PUBLIC_API XXH64_hash_t XXH64 (const void* input, size_t length, unsigned long long seed);
+
+/*======   Streaming   ======*/
+typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */
+XXH_PUBLIC_API XXH64_state_t* XXH64_createState (void);
+XXH_PUBLIC_API XXH_errorcode XXH64_freeState (XXH64_state_t* statePtr);
+XXH_PUBLIC_API void XXH64_copyState (XXH64_state_t* dst_state, const XXH64_state_t* src_state);
+
+XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH64_state_t* statePtr, unsigned long long seed);
+XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* statePtr, const void* input,
+                                           size_t length);
+XXH_PUBLIC_API XXH64_hash_t XXH64_digest (const XXH64_state_t* statePtr);
+
+/*======   Canonical representation   ======*/
+typedef struct {
+  unsigned char digest[8];
+} XXH64_canonical_t;
+XXH_PUBLIC_API void XXH64_canonicalFromHash (XXH64_canonical_t* dst, XXH64_hash_t hash);
+XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical (const XXH64_canonical_t* src);
+#endif /* XXH_NO_LONG_LONG */
+
+#ifdef XXH_STATIC_LINKING_ONLY
+
+/* ================================================================================================
+   This section contains declarations which are not guaranteed to remain stable.
+   They may change in future versions, becoming incompatible with a different version of the
+library. These declarations should only be used with static linking. Never use them in association
+with dynamic linking !
+===================================================================================================
+*/
+
+/* These definitions are only present to allow
+ * static allocation of XXH state, on stack or in a struct for example.
+ * Never **ever** use members directly. */
+
+#if !defined(__VMS) &&                                                                             \
+    (defined(__cplusplus) ||                                                                       \
+     (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */))
+#include <stdint.h>
+
+struct XXH32_state_s {
+  uint32_t total_len_32;
+  uint32_t large_len;
+  uint32_t v1;
+  uint32_t v2;
+  uint32_t v3;
+  uint32_t v4;
+  uint32_t mem32[4];
+  uint32_t memsize;
+  uint32_t reserved; /* never read nor write, might be removed in a future version */
+}; /* typedef'd to XXH32_state_t */
+
+struct XXH64_state_s {
+  uint64_t total_len;
+  uint64_t v1;
+  uint64_t v2;
+  uint64_t v3;
+  uint64_t v4;
+  uint64_t mem64[4];
+  uint32_t memsize;
+  uint32_t reserved[2]; /* never read nor write, might be removed in a future version */
+}; /* typedef'd to XXH64_state_t */
+
+#else
+
+struct XXH32_state_s {
+  unsigned total_len_32;
+  unsigned large_len;
+  unsigned v1;
+  unsigned v2;
+  unsigned v3;
+  unsigned v4;
+  unsigned mem32[4];
+  unsigned memsize;
+  unsigned reserved; /* never read nor write, might be removed in a future version */
+}; /* typedef'd to XXH32_state_t */
+
+#ifndef XXH_NO_LONG_LONG /* remove 64-bit support */
+struct XXH64_state_s {
+  unsigned long long total_len;
+  unsigned long long v1;
+  unsigned long long v2;
+  unsigned long long v3;
+  unsigned long long v4;
+  unsigned long long mem64[4];
+  unsigned memsize;
+  unsigned reserved[2]; /* never read nor write, might be removed in a future version */
+}; /* typedef'd to XXH64_state_t */
+#endif
+
+#endif
+
+#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
+#include "xxhash.c" /* include xxhash function bodies as `static`, for inlining */
+#endif
+
+#endif /* XXH_STATIC_LINKING_ONLY */
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* XXHASH_H_5627135585666179 */

kernel/make/src.mk

@@ -10,6 +10,7 @@ include fs/src.mk
 include device/src.mk
 include Flanterm/src.mk
 include id/src.mk
+include lz4/src.mk
 
 ifeq ($(PLATFORM_ACPI),1)
 include uACPI/src.mk

lz4/.circleci/config.yml

@@ -0,0 +1,70 @@
+# This configuration was automatically generated from a CircleCI 1.0 config.
+# It should include any build commands you had along with commands that CircleCI
+# inferred from your project structure. We strongly recommend you read all the
+# comments in this file to understand the structure of CircleCI 2.0, as the idiom
+# for configuration has changed substantially in 2.0 to allow arbitrary jobs rather
+# than the prescribed lifecycle of 1.0. In general, we recommend using this generated
+# configuration as a reference rather than using it in production, though in most
+# cases it should duplicate the execution of your original 1.0 config.
+version: 2
+jobs:
+  build:
+    working_directory: ~/lz4/lz4
+    # Parallelism is broken in this file : it just plays the same tests twice.
+    # The script will have to be modified to support parallelism properly
+    # In the meantime, set it to 1.
+    parallelism: 1
+    shell: /bin/bash --login
+    # CircleCI 2.0 does not support environment variables that refer to each other the same way as 1.0 did.
+    # If any of these refer to each other, rewrite them so that they don't or see https://circleci.com/docs/2.0/env-vars/#interpolating-environment-variables-to-set-other-environment-variables .
+    environment:
+      CIRCLE_ARTIFACTS: /tmp/circleci-artifacts
+      CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
+    # In CircleCI 1.0 we used a pre-configured image with a large number of languages and other packages.
+    # In CircleCI 2.0 you can now specify your own image, or use one of our pre-configured images.
+    # The following configuration line tells CircleCI to use the specified docker image as the runtime environment for you job.
+    # We have selected a pre-built image that mirrors the build environment we use on
+    # the 1.0 platform, but we recommend you choose an image more tailored to the needs
+    # of each job. For more information on choosing an image (or alternatively using a
+    # VM instead of a container) see https://circleci.com/docs/2.0/executor-types/
+    # To see the list of pre-built images that CircleCI provides for most common languages see
+    # https://circleci.com/docs/2.0/circleci-images/
+    docker:
+    - image: fbopensource/lz4-circleci-primary:0.0.4
+    steps:
+    # Machine Setup
+    #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
+    # The following `checkout` command checks out your code to your working directory. In 1.0 we did this implicitly. In 2.0 you can choose where in the course of a job your code should be checked out.
+    - checkout
+    # Prepare for artifact and test results  collection equivalent to how it was done on 1.0.
+    # In many cases you can simplify this from what is generated here.
+    # 'See docs on artifact collection here https://circleci.com/docs/2.0/artifacts/'
+    - run: mkdir -p $CIRCLE_ARTIFACTS $CIRCLE_TEST_REPORTS
+    # Test
+    #   This would typically be a build job when using workflows, possibly combined with build
+    # This is based on your 1.0 configuration file or project settings
+    - run: CC=clang CFLAGS="-Werror -O0" make all && make clean
+    - run: c++ -v; make cxxtest V=1 && make clean
+    - run: cc -v; c++ -v; make ctocxxtest && make clean
+    - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -Werror" make check && make clean
+    - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
+    - run: gcc-6 -v; CC=gcc-6 CFLAGS="-O2 -Werror" make check  && make clean
+    - run: make cmakebuild           && make clean
+    - run: make -C tests test-lz4
+    - run: make -C tests test-lz4c
+    - run: make -C tests test-frametest
+    - run: make -C tests test-fuzzer && make clean
+    - run: make -C lib all           && make clean
+    - run: pyenv global 3.14; CPPFLAGS=-I/usr/include/x86_64-linux-gnu make versionsTest && make clean
+    - run: make test-install         && make clean
+    - run: gcc -v; CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
+    # Teardown
+    #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
+    # Save test results
+    - store_test_results:
+        path: /tmp/circleci-test-results
+    # Save artifacts
+    - store_artifacts:
+        path: /tmp/circleci-artifacts
+    - store_artifacts:
+        path: /tmp/circleci-test-results

lz4/.circleci/images/primary/Dockerfile

@@ -0,0 +1,12 @@
+FROM circleci/buildpack-deps:bionic
+
+RUN sudo apt-get -y -qq update
+RUN sudo apt-get -y install software-properties-common
+RUN sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+RUN sudo apt-get -y install cmake
+RUN sudo apt-get -y install qemu-system-ppc qemu-user-static qemu-system-arm
+RUN sudo apt-get -y install libc6-dev-armel-cross  libc6-dev-arm64-cross libc6-dev-i386
+RUN sudo apt-get -y install clang clang-tools
+RUN sudo apt-get -y install gcc-5 gcc-5-multilib gcc-6
+RUN sudo apt-get -y install valgrind
+RUN sudo apt-get -y install gcc-multilib-powerpc-linux-gnu gcc-powerpc-linux-gnu gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu

lz4/.cirrus.yml

@@ -0,0 +1,9 @@
+task:
+  name: FreeBSD
+  freebsd_instance:
+    matrix:
+      image_family: freebsd-15-0-amd64-zfs
+  install_script: pkg install -y gmake
+  script: |
+    cc -v
+    gmake test

lz4/.clang-format

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

lz4/.gitattributes

@@ -0,0 +1,21 @@
+# Set the default behavior
+* text eol=lf
+
+# Explicitly declare source files
+*.c text eol=lf
+*.h text eol=lf
+
+# Denote files that should not be modified.
+*.odt binary
+*.png binary
+
+# Visual Studio
+*.sln text eol=crlf
+*.vcxproj* text eol=crlf
+*.vcproj* text eol=crlf
+*.suo binary
+*.rc text eol=crlf
+
+# Windows
+*.bat text eol=crlf
+*.cmd text eol=crlf

lz4/.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+Please describe what you expected to happen.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error '...'
+If applicable, add screenshots to help explain your problem.
+
+**System (please complete the following information):**
+ - OS: [e.g. Mac]
+ - Version [e.g. 22]
+ - Compiler [e.g. gcc]
+ - Build System [e.g. Makefile]
+ - Other hardware specs [e.g. Core 2 duo...]
+
+**Additional context**
+Add any other context about the problem here.

lz4/.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

lz4/.github/dependabot.yaml

@@ -0,0 +1,7 @@
+version: 2
+
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly

lz4/.github/workflows/README.md

@@ -0,0 +1,56 @@
+This directory contains [GitHub Actions](https://github.com/features/actions) workflow files.
+
+# Workflow Organization
+
+The CI/CD workflows are organized into focused, maintainable files:
+
+## Core Testing Workflows
+- **`compilers.yml`** - Tests compatibility across different C compilers (GCC, Clang versions)
+- **`core-tests.yml`** - Core LZ4 functionality testing (benchmarks, fuzzing, frame format, ABI compatibility, etc.)
+- **`sanitizers.yml`** - Memory safety testing (AddressSanitizer, MemorySanitizer, UBSan, ThreadSanitizer)
+
+## Platform & Build System Testing
+- **`cross-platform.yml`** - Cross-platform testing using QEMU emulation and native macOS builds
+- **`build-systems.yml`** - Alternative build systems (Visual Studio, Meson)
+- **`cmake-test.yml`** - CMake build system testing
+
+## Code Quality & Analysis
+- **`code-quality.yml`** - Static analysis tools (cppcheck, scan-build, valgrind, unicode lint)
+- **`oss-fuzz.yml`** - OSS-Fuzz integration for continuous fuzzing
+
+## Utilities & Environment
+- **`release-environment.yml`** - Release validation and environment information gathering
+- **`scorecard.yml`** - Security scorecard analysis
+
+This organization provides:
+- **Better maintainability** - Changes to specific test categories only affect relevant files
+- **Improved parallelization** - Workflows run independently and in parallel
+- **Clearer failure isolation** - Easier to identify which types of tests are failing
+- **Enhanced readability** - Each workflow has a single, clear responsibility
+
+# Known issues
+
+## Sanitizers (UBSan, ASan) - `sanitizers.yml`
+
+### UBSan (UndefinedBehaviorSanitizer)
+For now, UBSan tests use the `-fsanitize-recover=pointer-overflow` flag:
+there are known cases of pointer overflow arithmetic within `lz4.c` fast compression.
+These cases are not dangerous with known architecture,
+but they are not guaranteed to work by the C standard,
+which means that, in some future, some new architecture or some new compiler
+may decide to do something funny that could break this behavior.
+Hence, in anticipation, it's better to remove them.
+This has been already achieved in `lz4hc.c`.
+However, the same attempt in `lz4.c` resulted in massive speed losses,
+which is not an acceptable cost for preemptively solving a "potential future" problem
+not active anywhere today.
+Therefore, a more acceptable work-around will have to be found first.
+
+
+## cppcheck - `code-quality.yml`
+
+This test script ignores the exit code of `make cppcheck`.
+Because this project doesn't 100% follow their recommendation.
+Also sometimes it reports false positives.
+
+

lz4/.github/workflows/build-systems.yml

@@ -0,0 +1,109 @@
+# Build system testing (Visual Studio, Meson)
+name: Build Systems
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  windows-visual-studio:
+    name: ${{ matrix.system.os }} Visual Studio
+    runs-on: ${{ matrix.system.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        system:
+          - { os: windows-2022, build_path: ".\\build\\VS2022" }
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Build Win32 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-win32-debug.bat
+        popd
+
+    - name: Build x64 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-x64-debug.bat
+        popd
+
+    - name: Generate VS solution
+      run: |
+        pushd ".\\build\\visual"
+        .\\generate_vs2022.cmd
+        popd
+
+    - name: Upload generated VS2022 directory
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+      with:
+        name: VS2022-Build-Dir
+        path: "build/visual/Visual Studio 17 2022"
+
+    - name: Build executable with generated solution
+      run: cmake --build "build/visual/Visual Studio 17 2022" --config Debug
+
+    - name: Run minimal runtime test
+      run: |
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -vvV
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -bi1
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe"
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -t ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe.lz4"
+
+  meson:
+    name: Meson + Ninja
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Setup Python
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+      with:
+        python-version: '3.x'
+
+    - name: Install build tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install tree ninja-build
+        python -m pip install --upgrade pip
+        pip3 install --user meson
+
+    - name: Display environment info
+      run: |
+        type clang && which clang && clang --version
+        type python && which python && python --version
+        type meson && which meson && meson --version
+
+    - name: Configure build
+      run: >
+        meson setup
+        --fatal-meson-warnings
+        --buildtype=debug
+        -Db_lundef=false
+        -Dauto_features=enabled
+        -Dprograms=true
+        -Dcontrib=true
+        -Dtests=true
+        -Dexamples=true
+        build/meson builddir
+
+    - name: Run tests
+      run: meson test -C builddir
+
+    - name: Test installation
+      run: |
+        cd builddir
+        DESTDIR=./staging ninja install
+        tree ./staging

lz4/.github/workflows/cmake-test.yml

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

lz4/.github/workflows/code-quality.yml

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

lz4/.github/workflows/compilers.yml

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

lz4/.github/workflows/core-tests.yml

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

lz4/.github/workflows/cross-platform.yml

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

lz4/.github/workflows/oss-fuzz.yml

@@ -0,0 +1,45 @@
+# OSS-Fuzz integration testing
+name: OSS-Fuzz
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  oss-fuzz:
+    name: OSS-Fuzz (${{ matrix.sanitizer }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined, memory]
+
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        fuzz-seconds: 100
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Upload Crash Artifacts
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: ${{ matrix.sanitizer }}-artifacts
+        path: ./out/artifacts

lz4/.github/workflows/release-environment.yml

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

lz4/.github/workflows/sanitizers.yml

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

lz4/.github/workflows/scorecard.yml

@@ -0,0 +1,65 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '23 22 * * 3'
+  push:
+    branches: [ "dev" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@62b2cac7ed8198b15735ed49ab1e5cf35480ba46 # v2.4.0
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # you want to enable the Branch-Protection check on a *public* repository
+          # To create the PAT, follow the steps in
+          # https://github.com/ossf/scorecard-action#authentication-with-fine-grained-pat-optional
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # - Publish results to OpenSSF REST API for easy access by consumers
+          # - Allows the repository to include the Scorecard badge.
+          # - See https://github.com/ossf/scorecard-action#publishing-results.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@89a39a4e59826350b863aa6b6252a07ad50cf83e # v4.32.4
+        with:
+          sarif_file: results.sarif

lz4/.gitignore

@@ -0,0 +1,64 @@
+# Object files
+*.o
+*.ko
+obj/
+cacheObjs/
+
+# Libraries
+*.lib
+*.a
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+*.dSYM   # apple
+
+# Executables
+*.exe
+*.out
+*.app
+lz4
+
+# Builders
+cmakebuild/
+builddir/
+cachedObjs/
+
+# IDE / editors files
+.clang_complete
+.vscode
+_codelite/
+_codelite_lz4/
+bin/
+*.zip
+*.swp
+compile_flags.txt
+compile_commands.json
+.vscode
+.cache
+
+# analyzers
+infer-out
+
+# Mac
+.DS_Store
+*.dSYM
+
+# Windows / Msys
+nul
+ld.exe*
+
+# test artifacts
+*.lz4
+tmp*
+.stdvars.log
+cmake_download/
+cmake_bins/
+cmake_build/
+cmake_install_test/
+
+# generated Windows resource files
+lib/*.rc
+programs/*.rc

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/INSTALL

@@ -0,0 +1,16 @@
+Installation
+=============
+
+```
+make
+make install     # this command may require root access
+```
+
+LZ4's `Makefile` supports standard [Makefile conventions],
+including [staged installs], [redirection], or [command redefinition].
+It is compatible with parallel builds (`-j#`).
+
+[Makefile conventions]: https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html
+[staged installs]: https://www.gnu.org/prep/standards/html_node/DESTDIR.html
+[redirection]: https://www.gnu.org/prep/standards/html_node/Directory-Variables.html
+[command redefinition]: https://www.gnu.org/prep/standards/html_node/Utilities-in-Makefiles.html

lz4/LICENSE

@@ -0,0 +1,12 @@
+This repository uses 2 different licenses :
+- all files in the `lib` directory use a BSD 2-Clause license
+- 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.
+
+This model is selected to emphasize that
+files in the `lib` directory are designed to be included into 3rd party applications,
+while all other files, in `programs`, `tests` or `examples`,
+are intended to be used "as is", as part of their intended scenarios,
+with no intention to support 3rd party integration use cases.

lz4/Makefile

@@ -0,0 +1,257 @@
+# ################################################################
+# LZ4 - Makefile
+# Copyright (C) Yann Collet 2011-2023
+# All rights reserved.
+#
+# BSD license
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice, this
+#   list of conditions and the following disclaimer in the documentation and/or
+#   other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# You can contact the author at :
+#  - LZ4 source repository : https://github.com/lz4/lz4
+#  - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
+# ################################################################
+
+LZ4DIR  = lib
+PRGDIR  = programs
+TESTDIR = tests
+EXDIR   = examples
+FUZZDIR = ossfuzz
+
+include build/make/lz4defs.make
+
+MAKE += --no-print-directory
+
+.PHONY: default
+default: lib-release lz4-release
+
+# silent mode by default; verbose can be triggered by V=1 or VERBOSE=1
+$(V)$(VERBOSE).SILENT:
+
+.PHONY: all
+all: allmost examples manuals build_tests
+
+.PHONY: allmost
+allmost: lib lz4
+
+.PHONY: lib lib-release liblz4.a
+lib lib-release liblz4.a:
+	$(MAKE) -C $(LZ4DIR) $@
+
+.PHONY: lz4 lz4-release
+lz4 lz4-release :
+	$(MAKE) -C $(PRGDIR) $@
+	$(LN_SF) $(PRGDIR)/lz4$(EXT) .
+	echo lz4 build completed
+
+.PHONY: examples
+examples: lib
+	$(MAKE) -C $(EXDIR) all
+
+.PHONY: manuals
+manuals:
+	$(MAKE) -C contrib/gen_manual $@
+
+.PHONY: build_tests
+build_tests:
+	$(MAKE) -C $(TESTDIR) all
+
+.PHONY: clean
+clean: MAKEFLAGS= --no-print-directory
+clean:
+	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
+	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
+	$(MAKE) -C $(TESTDIR) $@ > $(VOID)
+	$(MAKE) -C $(EXDIR) $@ > $(VOID)
+	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
+	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
+	$(RM) lz4$(EXT)
+	$(RM) -r $(CMAKE_BUILD_DIR) $(MESON_BUILD_DIR)
+	@echo Cleaning completed
+
+
+#-----------------------------------------------------------------------------
+# make install is validated only for Posix environments
+#-----------------------------------------------------------------------------
+ifeq ($(POSIX_ENV),Yes)
+HOST_OS = POSIX
+
+.PHONY: install uninstall
+install uninstall:
+	$(MAKE) -C $(LZ4DIR) $@
+	$(MAKE) -C $(PRGDIR) $@
+
+.PHONY: test-install
+test-install:
+	$(MAKE) -j1 install DESTDIR=~/install_test_dir
+
+endif   # POSIX_ENV
+
+
+CMAKE ?= cmake
+CMAKE_BUILD_DIR ?= build/cmake/build
+ifneq (,$(filter MSYS%,$(shell $(UNAME))))
+HOST_OS = MSYS
+CMAKE_PARAMS = -G"MSYS Makefiles"
+endif
+
+.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 $(MESON_BUILD_DIR)
+
+#------------------------------------------------------------------------
+# make tests validated only for MSYS and Posix environments
+#------------------------------------------------------------------------
+ifneq (,$(filter $(HOST_OS),MSYS POSIX))
+
+.PHONY: list
+list:
+	$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | xargs
+
+.PHONY: check
+check:
+	$(MAKE) -C $(TESTDIR) test-lz4-essentials
+
+.PHONY: test
+test:
+	$(MAKE) -C $(TESTDIR) $@
+	$(MAKE) -C $(EXDIR) $@
+
+.PHONY: usan
+usan: CC      = clang
+usan: CFLAGS  = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
+usan: LDFLAGS = $(CFLAGS)
+usan: clean
+	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
+
+.PHONY: ubsan
+ubsan: usan
+
+.PHONY: usan32
+usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
+usan32: LDFLAGS = $(CFLAGS)
+usan32: clean
+	CFLAGS='$(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
+.PHONY: staticAnalyze
+staticAnalyze: clean
+	CPPFLAGS=-DLZ4_DEBUG=1 CFLAGS=-g $(SCANBUILD) $(SCANBUILD_FLAGS) $(MAKE) all V=1 DEBUGLEVEL=1
+
+.PHONY: cppcheck
+cppcheck:
+	cppcheck . --force --enable=warning,portability,performance,style --error-exitcode=1 > /dev/null
+
+.PHONY: platformTest
+platformTest: clean
+	@echo "\n ---- test lz4 with $(CC) compiler ----"
+	$(CC) -v
+	CFLAGS="$(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:
+	$(MAKE) -C $(TESTDIR) clean
+	$(MAKE) -C $(TESTDIR) $@
+
+.PHONY: test-freestanding
+test-freestanding:
+	$(MAKE) -C $(TESTDIR) clean
+	$(MAKE) -C $(TESTDIR) $@
+
+# test linking C libraries from C++ executables
+.PHONY: ctocxxtest
+ctocxxtest: LIBCC="$(CC)"
+ctocxxtest: EXECC="$(CXX) -Wno-deprecated"
+ctocxxtest: CFLAGS=-O0
+ctocxxtest:
+	CFLAGS="$(CFLAGS)" CC=$(LIBCC) $(MAKE) -C $(LZ4DIR)  all
+	CC=$(LIBCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
+	CC=$(EXECC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all
+
+.PHONY: cxxtest cxx32test
+cxx32test: CFLAGS += -m32
+cxxtest cxx32test: CC := "$(CXX) -Wno-deprecated"
+cxxtest cxx32test: CFLAGS = -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
+cxxtest cxx32test:
+	$(CXX) -v
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(LZ4DIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(PRGDIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(TESTDIR) all
+
+.PHONY: cxx17build
+cxx17build : CC = "$(CXX) -Wno-deprecated"
+cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -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: 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 -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 -Wpedantic" $(MAKE) all
+	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -Wpedantic" $(MAKE) all
+
+.PHONY: c_standards_c11
+c_standards_c11: clean
+	$(MAKE) clean; CFLAGS="-std=c11 -Werror" $(MAKE) all
+
+# The following test ensures that standard Makefile variables set through environment
+# are correctly transmitted at compilation stage.
+# This test is meant to detect issues like https://github.com/lz4/lz4/issues/958
+.PHONY: test_stdvars
+test_stdvars:  ## CI helper – verifies CC/CFLAGS/CPPFLAGS/LDFLAGS/LDLIBS propagation
+	@echo '--- standard-variable propagation test ---'
+	@$(RM) .stdvars.log
+
+	@$(MAKE) -rn V=1 \
+	    CC='cc -DCC_TEST' \
+	    CFLAGS='-DCFLAGS_TEST' \
+	    CPPFLAGS='-DCPPFLAGS_TEST' \
+	    LDFLAGS='-DLDFLAGS_TEST' \
+	    LDLIBS='-DLDLIBS_TEST' \
+	  | tee .stdvars.log >/dev/null
+
+	@tests/check_stdvars.sh .stdvars.log
+	@$(RM) .stdvars.log
+
+endif   # MSYS POSIX

lz4/NEWS

@@ -0,0 +1,366 @@
+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
+api  : new function `LZ4_decompress_safe_partial_usingDict()` by @yawqi
+api  : lz4frame: ability to provide custom allocators at state creation
+api  : can skip checksum validation for improved decoding speed
+api  : new experimental unit `lz4file` for file i/o API, by @anjiahao1
+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
+build: `make` and `make test` are compatible with `-j` parallel run
+build: AS/400 compatibility, by @jonrumsey
+build: Solaris 10 compatibility, by @pekdon
+build: MSVC 2022 support, by @t-mat
+build: improved meson script, by @eli-schwartz
+doc  : Updated LZ4 block format, provide an "implementation notes" section
+
+v1.9.3
+perf: highly improved speed in kernel space, by @terrelln
+perf: faster speed with Visual Studio, thanks to @wolfpld and @remittor
+perf: improved dictionary compression speed, by @felixhandte
+perf: fixed LZ4_compress_HC_destSize() ratio, detected by @hsiangkao
+perf: reduced stack usage in high compression mode, by @Yanpas
+api : LZ4_decompress_safe_partial() supports unknown compressed size, requested by @jfkthame
+api : improved LZ4F_compressBound() with automatic flushing, by Christopher Harvie
+api : can (de)compress to/from NULL without UBs
+api : fix alignment test on 32-bit systems (state initialization)
+api : fix LZ4_saveDictHC() in corner case scenario, detected by @IgorKorkin
+cli : `-l` legacy format is now compatible with `-m` multiple files, by Filipe Calasans
+cli : benchmark mode supports dictionary, by @rkoradi
+cli : fix --fast with large argument, detected by @picoHz
+build: link to user-defined memory functions with LZ4_USER_MEMORY_FUNCTIONS, suggested by Yuriy Levchenko
+build: contrib/cmake_unofficial/ moved to build/cmake/
+build: visual/* moved to build/
+build: updated meson script, by @neheb
+build: tinycc support, by Anton Kochkov
+install: Haiku support, by Jerome Duval
+doc : updated LZ4 frame format, clarify EndMark
+
+v1.9.2
+fix : out-of-bound read in exceptional circumstances when using decompress_partial(), by @terrelln
+fix : slim opportunity for out-of-bound write with compress_fast() with a large enough input and when providing an output smaller than recommended (< LZ4_compressBound(inputSize)), by @terrelln
+fix : rare data corruption bug with LZ4_compress_destSize(), by @terrelln
+fix : data corruption bug when Streaming with an Attached Dict in HC Mode, by @felixhandte
+perf: enable LZ4_FAST_DEC_LOOP on aarch64/GCC by default, by @prekageo
+perf: improved lz4frame streaming API speed, by @dreambottle
+perf: speed up lz4hc on slow patterns when using external dictionary, by @terrelln
+api: better in-place decompression and compression support
+cli : --list supports multi-frames files, by @gstedman
+cli: --version outputs to stdout
+cli : add option --best as an alias of -12 , by @Low-power
+misc: Integration into oss-fuzz by @cmeister2, expanded list of scenarios by @terrelln
+
+v1.9.1
+fix : decompression functions were reading a few bytes beyond input size (introduced in v1.9.0, reported by @ppodolsky and @danlark1)
+api : fix : lz4frame initializers compatibility with c++, reported by @degski
+cli : added command --list, based on a patch by @gabrielstedman
+build: improved Windows build, by @JPeterMugaas
+build: AIX, by Norman Green
+
+v1.9.0
+perf: large decompression speed improvement on x86/x64 (up to +20%) by @djwatson
+api : changed : _destSize() compression variants are promoted to stable API
+api : new : LZ4_initStream(HC), replacing LZ4_resetStream(HC)
+api : changed : LZ4_resetStream(HC) as recommended reset function, for better performance on small data
+cli : support custom block sizes, by @blezsan
+build: source code can be amalgamated, by Bing Xu
+build: added meson build, by @lzutao
+build: new build macros : LZ4_DISTANCE_MAX, LZ4_FAST_DEC_LOOP
+install: MidnightBSD, by @laffer1
+install: msys2 on Windows 10, by @vtorri
+
+v1.8.3
+perf: minor decompression speed improvement (~+2%) with gcc
+fix : corruption in v1.8.2 at level 9 for files > 64KB under rare conditions (#560)
+cli : new command --fast, by @jennifermliu
+cli : fixed elapsed time, and added cpu load indicator (on -vv) (#555)
+api : LZ4_decompress_safe_partial() now decodes exactly the nb of bytes requested (feature request #566)
+build : added Haiku target, by @fbrosson, and MidnightBSD, by @laffer1
+doc : updated documentation regarding dictionary compression
+
+v1.8.2
+perf: *much* faster dictionary compression on small files, by @felixhandte
+perf: improved decompression speed and binary size, by Alexey Tourbin (@svpv)
+perf: slightly faster HC compression and decompression speed
+perf: very small compression ratio improvement
+fix : compression compatible with low memory addresses (< 0xFFFF)
+fix : decompression segfault when provided with NULL input, by @terrelln
+cli : new command --favor-decSpeed
+cli : benchmark mode more accurate for small inputs
+fullbench : can bench _destSize() variants, by @felixhandte
+doc : clarified block format parsing restrictions, by Alexey Tourbin (@svpv)
+
+v1.8.1
+perf : faster and stronger ultra modes (levels 10+)
+perf : slightly faster compression and decompression speed
+perf : fix bad degenerative case, reported by @c-morgenstern
+fix : decompression failed when using a combination of extDict + low memory address (#397), reported and fixed by Julian Scheid (@jscheid)
+cli : support for dictionary compression (`-D`), by Felix Handte @felixhandte
+cli : fix : `lz4 -d --rm` preserves timestamp (#441)
+cli : fix : do not modify /dev/null permission as root, by @aliceatlas
+api : `_destSize()` variant supported for all compression levels
+build  : `make` and `make test` compatible with `-jX`, reported by @mwgamera
+build  : can control LZ4LIB_VISIBILITY macro, by @mikir
+install: fix man page directory (#387), reported by Stuart Cardall (@itoffshore)
+
+v1.8.0
+cli : fix : do not modify /dev/null permissions, reported by @Maokaman1
+cli : added GNU separator -- specifying that all following arguments are files
+API : added LZ4_compress_HC_destSize(), by Oleg (@remittor)
+API : added LZ4F_resetDecompressionContext()
+API : lz4frame : negative compression levels trigger fast acceleration, request by Lawrence Chan
+API : lz4frame : can control block checksum and dictionary ID
+API : fix : expose obsolete decoding functions, reported by Chen Yufei
+API : experimental : lz4frame_static : new dictionary compression API
+build : fix : static lib installation, by Ido Rosen
+build : dragonFlyBSD, OpenBSD, NetBSD supported
+build : LZ4_MEMORY_USAGE can be modified at compile time, through external define
+doc : Updated LZ4 Frame format to v1.6.0, restoring Dictionary-ID field
+doc : lz4 api manual, by Przemyslaw Skibinski
+
+v1.7.5
+lz4hc : new high compression mode : levels 10-12 compress more and slower, by Przemyslaw Skibinski
+lz4cat : fix : works with relative path (#284) and stdin (#285) (reported by @beiDei8z)
+cli : fix minor notification when using -r recursive mode
+API : lz4frame : LZ4F_frameBound(0) gives upper bound of *flush() and *End() operations (#290, #280)
+doc : markdown version of man page, by Takayuki Matsuoka (#279)
+build : Makefile : fix make -jX lib+exe concurrency (#277)
+build : cmake : improvements by Michał Górny (#296)
+
+v1.7.4.2
+fix : Makefile : release build compatible with PIE and customized compilation directives provided through environment variables (#274, reported by Antoine Martin)
+
+v1.7.4
+Improved : much better speed in -mx32 mode
+cli : fix : Large file support in 32-bits mode on Mac OS-X
+fix : compilation on gcc 4.4 (#272), reported by Antoine Martin
+
+v1.7.3
+Changed : moved to versioning; package, cli and library have same version number
+Improved: Small decompression speed boost
+Improved: Small compression speed improvement on 64-bits systems
+Improved: Small compression ratio and speed improvement on small files
+Improved: Significant speed boost on ARMv6 and ARMv7
+Fix : better ratio on 64-bits big-endian targets
+Improved cmake build script, by Evan Nemerson
+New liblz4-dll project, by Przemyslaw Skibinki
+Makefile: Generates object files (*.o) for faster (re)compilation on low power systems
+cli : new : --rm and --help commands
+cli : new : preserved file attributes, by Przemyslaw Skibinki
+cli : fix : crash on some invalid inputs
+cli : fix : -t correctly validates lz4-compressed files, by Nick Terrell
+cli : fix : detects and reports fread() errors, thanks to Hiroshi Fujishima report #243
+cli : bench : new : -r recursive mode
+lz4cat : can cat multiple files in a single command line (#184)
+Added : doc/lz4_manual.html, by Przemyslaw Skibinski
+Added : dictionary compression and frame decompression examples, by Nick Terrell
+Added : Debianization, by Evgeniy Polyakov
+
+r131
+New    : Dos/DJGPP target, thanks to Louis Santillan (#114)
+Added  : Example using lz4frame library, by Zbigniew Jędrzejewski-Szmek (#118)
+Changed: xxhash symbols are modified (namespace emulation) within liblz4
+
+r130:
+Fixed  : incompatibility sparse mode vs console, reported by Yongwoon Cho (#105)
+Fixed  : LZ4IO exits too early when frame crc not present, reported by Yongwoon Cho (#106)
+Fixed  : incompatibility sparse mode vs append mode, reported by Takayuki Matsuoka (#110)
+Performance fix : big compression speed boost for clang (+30%)
+New    : cross-version test, by Takayuki Matsuoka
+
+r129:
+Added  : LZ4_compress_fast(), LZ4_compress_fast_continue()
+Added  : LZ4_compress_destSize()
+Changed: New lz4 and lz4hc compression API. Previous function prototypes still supported.
+Changed: Sparse file support enabled by default
+New    : LZ4 CLI improved performance compressing/decompressing multiple files (#86, kind contribution from Kyle J. Harper & Takayuki Matsuoka)
+Fixed  : GCC 4.9+ optimization bug - Reported by Markus Trippelsdorf, Greg Slazinski & Evan Nemerson
+Changed: Enums converted to LZ4F_ namespace convention - by Takayuki Matsuoka
+Added  : AppVeyor CI environment, for Visual tests - Suggested by Takayuki Matsuoka
+Modified:Obsolete functions generate warnings - Suggested by Evan Nemerson, contributed by Takayuki Matsuoka
+Fixed  : Bug #75 (unfinished stream), reported by Yongwoon Cho
+Updated: Documentation converted to MarkDown format
+
+r128:
+New    : lz4cli sparse file support (Requested by Neil Wilson, and contributed by Takayuki Matsuoka)
+New    : command -m, to compress multiple files in a single command (suggested by Kyle J. Harper)
+Fixed  : Restored lz4hc compression ratio (slightly lower since r124)
+New    : lz4 cli supports long commands (suggested by Takayuki Matsuoka)
+New    : lz4frame & lz4cli frame content size support
+New    : lz4frame supports skippable frames, as requested by Sergey Cherepanov
+Changed: Default "make install" directory is /usr/local, as notified by Ron Johnson
+New    : lz4 cli supports "pass-through" mode, requested by Neil Wilson
+New    : datagen can generate sparse files
+New    : scan-build tests, thanks to kind help by Takayuki Matsuoka
+New    : g++ compatibility tests
+New    : arm cross-compilation test, thanks to kind help by Takayuki Matsuoka
+Fixed  : Fuzzer + frametest compatibility with NetBSD (issue #48, reported by Thomas Klausner)
+Added  : Visual project directory
+Updated: Man page & Specification
+
+r127:
+N/A   : added a file on SVN
+
+r126:
+New   : lz4frame API is now integrated into liblz4
+Fixed : GCC 4.9 bug on highest performance settings, reported by Greg Slazinski
+Fixed : bug within LZ4 HC streaming mode, reported by James Boyle
+Fixed : older compiler don't like nameless unions, reported by Cheyi Lin
+Changed : lz4 is C90 compatible
+Changed : added -pedantic option, fixed a few mminor warnings
+
+r125:
+Changed : endian and alignment code
+Changed : directory structure : new "lib" directory
+Updated : lz4io, now uses lz4frame
+Improved: slightly improved decoding speed
+Fixed : LZ4_compress_limitedOutput(); Special thanks to Christopher Speller !
+Fixed : some alignment warnings under clang
+Fixed : deprecated function LZ4_slideInputBufferHC()
+
+r124:
+New : LZ4 HC streaming mode
+Fixed : LZ4F_compressBound() using null preferencesPtr
+Updated : xxHash to r38
+Updated library number, to 1.4.0
+
+r123:
+Added : experimental lz4frame API, thanks to Takayuki Matsuoka and Christopher Jackson for testings
+Fix : s390x support, thanks to Nobuhiro Iwamatsu
+Fix : test mode (-t) no longer requires confirmation, thanks to Thary Nguyen
+
+r122:
+Fix : AIX & AIX64 support (SamG)
+Fix : mips 64-bits support (lew van)
+Added : Examples directory, using code examples from Takayuki Matsuoka
+Updated : Framing specification, to v1.4.1
+Updated : xxHash, to r36
+
+r121:
+Added : Makefile : install for kFreeBSD and Hurd (Nobuhiro Iwamatsu)
+Fix : Makefile : install for OS-X and BSD, thanks to Takayuki Matsuoka
+
+r120:
+Modified : Streaming API, using strong types
+Added : LZ4_versionNumber(), thanks to Takayuki Matsuoka
+Fix : OS-X : library install name, thanks to Clemens Lang
+Updated : Makefile : synchronize library version number with lz4.h, thanks to Takayuki Matsuoka
+Updated : Makefile : stricter compilation flags
+Added : pkg-config, thanks to Zbigniew Jędrzejewski-Szmek (issue 135)
+Makefile : lz4-test only test native binaries, as suggested by Michał Górny (issue 136)
+Updated : xxHash to r35
+
+r119:
+Fix : Issue 134 : extended malicious address space overflow in 32-bits mode for some specific configurations
+
+r118:
+New : LZ4 Streaming API (Fast version), special thanks to Takayuki Matsuoka
+New : datagen : parametrable synthetic data generator for tests
+Improved : fuzzer, support more test cases, more parameters, ability to jump to specific test
+fix : support ppc64le platform (issue 131)
+fix : Issue 52 (malicious address space overflow in 32-bits mode when using large custom format)
+fix : Makefile : minor issue 130 : header files permissions
+
+r117:
+Added : man pages for lz4c and lz4cat
+Added : automated tests on Travis, thanks to Takayuki Matsuoka !
+fix : block-dependency command line (issue 127)
+fix : lz4fullbench (issue 128)
+
+r116:
+hotfix (issue 124 & 125)
+
+r115:
+Added : lz4cat utility, installed on POSX systems (issue 118)
+OS-X compatible compilation of dynamic library (issue 115)
+
+r114:
+Makefile : library correctly compiled with -O3 switch (issue 114)
+Makefile : library compilation compatible with clang
+Makefile : library is versioned and linked (issue 119)
+lz4.h : no more static inline prototypes (issue 116)
+man : improved header/footer (issue 111)
+Makefile : Use system default $(CC) & $(MAKE) variables (issue 112)
+xxhash : updated to r34
+
+r113:
+Large decompression speed improvement for GCC 32-bits. Thanks to Valery Croizier !
+LZ4HC : Compression Level is now a programmable parameter (CLI from 4 to 9)
+Separated IO routines from command line (lz4io.c)
+Version number into lz4.h (suggested by Francesc Alted)
+
+r112:
+quickfix
+
+r111 :
+Makefile : added capability to install libraries
+Modified Directory tree, to better separate libraries from programs.
+
+r110 :
+lz4 & lz4hc : added capability to allocate state & stream state with custom allocator (issue 99)
+fuzzer & fullbench : updated to test new functions
+man : documented -l command (Legacy format, for Linux kernel compression) (issue 102)
+cmake : improved version by Mika Attila, building programs and libraries (issue 100)
+xxHash : updated to r33
+Makefile : clean also delete local package .tar.gz
+
+r109 :
+lz4.c : corrected issue 98 (LZ4_compress_limitedOutput())
+Makefile : can specify version number from makefile
+
+r108 :
+lz4.c : corrected compression efficiency issue 97 in 64-bits chained mode (-BD) for streams > 4 GB (thanks Roman Strashkin for reporting)
+
+r107 :
+Makefile : support DESTDIR for staged installs. Thanks Jorge Aparicio.
+Makefile : make install installs both lz4 and lz4c (Jorge Aparicio)
+Makefile : removed -Wno-implicit-declaration compilation switch
+lz4cli.c : include <stduni.h> for isatty() (Luca Barbato)
+lz4.h : introduced LZ4_MAX_INPUT_SIZE constant (Shay Green)
+lz4.h : LZ4_compressBound() : unified macro and inline definitions (Shay Green)
+lz4.h : LZ4_decompressSafe_partial() : clarify comments (Shay Green)
+lz4.c : LZ4_compress() verify input size condition (Shay Green)
+bench.c : corrected a bug in free memory size evaluation
+cmake : install into bin/ directory (Richard Yao)
+cmake : check for just C compiler (Elan Ruusamae)
+
+r106 :
+Makefile : make dist modify text files in the package to respect Unix EoL convention
+lz4cli.c : corrected small display bug in HC mode
+
+r105 :
+Makefile : New install script and man page, contributed by Prasad Pandit
+lz4cli.c : Minor modifications, for easier extensibility
+COPYING  : added license file
+LZ4_Streaming_Format.odt : modified file name to remove white space characters
+Makefile : .exe suffix now properly added only for Windows target

lz4/README.md

@@ -0,0 +1,119 @@
+LZ4 - Extremely fast compression
+================================
+
+LZ4 is lossless compression algorithm,
+providing compression speed > 500 MB/s per core,
+scalable with multi-cores CPU.
+It features an extremely fast decoder,
+with speed in multiple GB/s per core,
+typically reaching RAM speed limits on multi-core systems.
+
+Speed can be tuned dynamically, selecting an "acceleration" factor
+which trades compression ratio for faster speed.
+On the other end, a high compression derivative, LZ4_HC, is also provided,
+trading CPU time for improved compression ratio.
+All versions feature the same decompression speed.
+
+LZ4 is also compatible with [dictionary compression](https://github.com/facebook/zstd#the-case-for-small-data-compression),
+both at [API](https://github.com/lz4/lz4/blob/v1.8.3/lib/lz4frame.h#L481) and [CLI](https://github.com/lz4/lz4/blob/v1.8.3/programs/lz4.1.md#operation-modifiers) levels.
+It can ingest any input file as dictionary, though only the final 64KB are used.
+This capability can be combined with the [Zstandard Dictionary Builder](https://github.com/facebook/zstd/blob/v1.3.5/programs/zstd.1.md#dictionary-builder),
+in order to drastically improve compression performance on small files.
+
+LZ4 library is provided as open-source software using BSD 2-Clause license.
+
+
+Benchmarks
+-------------------------
+
+The benchmark uses [lzbench], from @inikep
+compiled with GCC v8.2.0 on Linux 64-bits (Ubuntu 4.18.0-17).
+The reference system uses a Core i7-9700K CPU @ 4.9GHz (w/ turbo boost).
+Benchmark evaluates the compression of reference [Silesia Corpus]
+in single-thread mode.
+
+[lzbench]: https://github.com/inikep/lzbench
+[Silesia Corpus]: http://sun.aei.polsl.pl/~sdeor/index.php?page=silesia
+
+|  Compressor             | Factor  | Compression | Decompression |
+|  ----------             | -----   | ----------- | ------------- |
+|  memcpy                 |  1.000  | 13700 MB/s  |  13700 MB/s   |
+|**LZ4 default (v1.9.0)** |**2.101**| **780 MB/s**| **4970 MB/s** |
+|  LZO 2.09               |  2.108  |   670 MB/s  |    860 MB/s   |
+|  QuickLZ 1.5.0          |  2.238  |   575 MB/s  |    780 MB/s   |
+|  Snappy 1.1.4           |  2.091  |   565 MB/s  |   1950 MB/s   |
+| [Zstandard] 1.4.0 -1    |  2.883  |   515 MB/s  |   1380 MB/s   |
+|  LZF v3.6               |  2.073  |   415 MB/s  |    910 MB/s   |
+| [zlib] deflate 1.2.11 -1|  2.730  |   100 MB/s  |    415 MB/s   |
+|**LZ4 HC -9 (v1.9.0)**   |**2.721**|    41 MB/s  | **4900 MB/s** |
+| [zlib] deflate 1.2.11 -6|  3.099  |    36 MB/s  |    445 MB/s   |
+
+[zlib]: http://www.zlib.net/
+[Zstandard]: http://www.zstd.net/
+
+
+Installation
+-------------------------
+
+```
+make
+make install     # this command may require root permissions
+```
+
+LZ4's `Makefile` supports standard [Makefile conventions],
+including [staged installs], [redirection], or [command redefinition].
+It is compatible with parallel builds (`-j#`).
+
+[Makefile conventions]: https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html
+[staged installs]: https://www.gnu.org/prep/standards/html_node/DESTDIR.html
+[redirection]: https://www.gnu.org/prep/standards/html_node/Directory-Variables.html
+[command redefinition]: https://www.gnu.org/prep/standards/html_node/Utilities-in-Makefiles.html
+
+### Building LZ4 - Using vcpkg
+
+You can download and install LZ4 using the [vcpkg](https://github.com/Microsoft/vcpkg) dependency manager:
+
+    git clone https://github.com/Microsoft/vcpkg.git
+    cd vcpkg
+    ./bootstrap-vcpkg.sh
+    ./vcpkg integrate install
+    ./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.
+
+Documentation
+-------------------------
+
+The raw LZ4 block compression format is detailed within [lz4_Block_format].
+
+Arbitrarily long files or data streams are compressed using multiple blocks,
+for streaming requirements. These blocks are organized into a frame,
+defined into [lz4_Frame_format].
+Interoperable versions of LZ4 must also respect the frame format.
+
+[lz4_Block_format]: doc/lz4_Block_format.md
+[lz4_Frame_format]: doc/lz4_Frame_format.md
+
+
+Other source versions
+-------------------------
+
+Beyond the C reference source,
+many contributors have created versions of lz4 in multiple languages
+(Java, C#, Python, Perl, Ruby, etc.).
+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?columns=4&exclude_unsupported=1)](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/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/appveyor.yml

@@ -0,0 +1,87 @@
+version: 1.0.{build}
+
+# Test matrix: MinGW compilers only (Visual Studio testing moved to GitHub Actions)
+environment:
+  matrix:
+    - COMPILER: gcc
+      PLATFORM: mingw32
+    - COMPILER: gcc
+      PLATFORM: mingw64
+    - COMPILER: clang
+      PLATFORM: mingw64
+
+install:
+  - echo Installing %COMPILER% %PLATFORM%
+  - mkdir bin
+  # Setup MinGW environment
+  - set "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin"
+  - set "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin"
+  - copy C:\MinGW\bin\mingw32-make.exe C:\MinGW\bin\make.exe >nul 2>&1
+  - copy C:\MinGW\bin\gcc.exe C:\MinGW\bin\cc.exe >nul 2>&1
+
+build_script:
+  - echo "*** Building %COMPILER% %PLATFORM% ***"
+  # Configure PATH for MinGW builds
+  - if [%PLATFORM%]==[mingw32] set PATH=%PATH_MINGW32%;%PATH%
+  - if [%PLATFORM%]==[mingw64] set PATH=%PATH_MINGW64%;%PATH%
+
+  # GCC Build
+  - if [%COMPILER%]==[gcc] (
+      echo "GCC build started" &&
+      gcc -v &&
+      make -v &&
+      make -j -C programs lz4 V=1 &&
+      make -j -C tests fullbench V=1 &&
+      make -j -C tests fuzzer V=1 &&
+      make -j -C lib lib V=1 LDFLAGS="-static-libgcc" &&
+      echo "Packaging GCC build..." &&
+      mkdir bin\dll bin\static bin\example bin\include &&
+      copy tests\fullbench.c bin\example\ &&
+      copy lib\xxhash.* bin\example\ &&
+      copy lib\lz4*.h bin\include\ &&
+      copy lib\liblz4.a bin\static\liblz4_static.lib &&
+      copy lib\liblz4.dll.a bin\dll\ >nul 2>&1 &&
+      (copy lib\liblz4.dll bin\dll\ 2>nul || copy lib\msys-lz4-1.dll bin\dll\liblz4.dll 2>nul || copy lib\cyglz4-1.dll bin\dll\liblz4.dll 2>nul || echo DLL copy warning) &&
+      copy lib\dll\example\* bin\example\ >nul 2>&1 &&
+      copy programs\lz4.exe bin\lz4.exe &&
+      copy tests\*.exe programs\
+    )
+
+  # Clang Build
+  - if [%COMPILER%]==[clang] (
+      echo "Clang build started" &&
+      clang -v &&
+      make -v &&
+      set "CFLAGS=--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
+      make -j -C programs lz4 CC=clang V=1 &&
+      make -j -C tests fullbench CC=clang V=1 &&
+      make -j -C tests fuzzer CC=clang V=1 &&
+      make -j -C lib lib CC=clang V=1 &&
+      copy tests\*.exe programs\
+    )
+
+  # Create release archives (GCC only)
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] 7z.exe a -bb1 bin\lz4_x64.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] appveyor PushArtifact bin\lz4_x64.zip
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] 7z.exe a -bb1 bin\lz4_x86.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] appveyor PushArtifact bin\lz4_x86.zip
+
+test_script:
+  - echo "*** Testing %COMPILER% %PLATFORM% ***"
+  - cd programs
+  - lz4 -h
+  - lz4 -i1b lz4.exe
+  - lz4 -i1b5 lz4.exe
+  - lz4 -i1b10 lz4.exe
+  - lz4 -i1b15 lz4.exe
+  - echo "------- lz4 tested -------"
+  - fullbench.exe -i0 fullbench.exe
+  - echo "Launching fuzzer test..."
+  - fuzzer.exe -v -T20s
+  - cd ..
+
+artifacts:
+  - path: bin\lz4_x64.zip
+    name: LZ4 Windows x64 Build
+  - path: bin\lz4_x86.zip
+    name: LZ4 Windows x86 Build

lz4/build/.gitignore

@@ -0,0 +1,18 @@
+# Visual C++
+.vs/
+*Copy
+*.db
+*.opensdf
+*.sdf
+*.suo
+*.user
+ver*/
+VS2010/bin/
+VS2017/bin/
+VS*/bin/
+ipch
+
+# Fixup for lz4 project directories
+!VS2010/lz4
+!VS2017/lz4
+!VS*/lz4

lz4/build/README.md

@@ -0,0 +1,44 @@
+Projects for various integrated development environments (IDE)
+==============================================================
+
+#### Included projects
+
+The following projects are included with the lz4 distribution:
+- `cmake` - CMake 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
+
+
+#### 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)_$(Configuration)` directory. For example `lz4` set to `x64` and
+`Release` will be compiled to `build\VS2010\bin\x64_Release\lz4.exe`. The solution file contains the
+following projects:
+
+- `lz4` : Command Line Utility, supporting gzip-like arguments
+- `datagen` : Synthetic and parametrable data generator, for tests
+- `frametest` : Test tool that checks lz4frame integrity on target platform
+- `fullbench`  : Precisely measure speed for each lz4 inner functions
+- `fuzzer` : Test tool, to check lz4 integrity on target platform
+- `liblz4` : A static LZ4 library compiled to `liblz4_static.lib`
+- `liblz4-dll` : A dynamic LZ4 library (DLL) compiled to `liblz4.dll` with the import library `liblz4.lib`
+- `fullbench-dll` : The fullbench program compiled with the import library; the executable requires LZ4 DLL
+
+
+#### Using LZ4 DLL with Microsoft Visual C++ project
+
+The header files `lib\lz4.h`, `lib\lz4hc.h`, `lib\lz4frame.h` and the import library
+`build\VS2010\bin\$(Platform)_$(Configuration)\liblz4.lib` are required to
+compile a project using Visual C++.
+
+1. The path to header files should be added to `Additional Include Directories` that can
+   be found in Project Properties of Visual Studio IDE in the `C/C++` Property Pages on the `General` page.
+2. The import library has to be added to `Additional Dependencies` that can
+   be found in Project Properties in the `Linker` Property Pages on the `Input` page.
+   If one will provide only the name `liblz4.lib` without a full path to the library
+   then the directory has to be added to `Linker\General\Additional Library Directories`.
+
+The compiled executable will require LZ4 DLL which is available at
+`build\VS2010\bin\$(Platform)_$(Configuration)\liblz4.dll`.

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/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/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/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/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/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/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/build/VS2022/datagen/datagen.vcxproj

@@ -0,0 +1,177 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{D745AE2F-596A-403A-9B91-81A8C6779243}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>datagen</RootNamespace>
+    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <WholeProgramOptimization Condition="'$(EnableWholeProgramOptimization)'=='true'">true</WholeProgramOptimization>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <WholeProgramOptimization Condition="'$(EnableWholeProgramOptimization)'=='true'">true</WholeProgramOptimization>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <RunCodeAnalysis>true</RunCodeAnalysis>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\programs;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <RunCodeAnalysis>true</RunCodeAnalysis>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <EnablePREfast>false</EnablePREfast>
+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreadedDebug</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <EnablePREfast>true</EnablePREfast>
+      <AdditionalOptions>/analyze:stacksize295252 %(AdditionalOptions)</AdditionalOptions>
+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreadedDebug</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <EnablePREfast>false</EnablePREfast>
+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <EnablePREfast>true</EnablePREfast>
+      <AdditionalOptions>/analyze:stacksize295252 %(AdditionalOptions)</AdditionalOptions>
+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\programs\lorem.c" />
+    <ClCompile Include="..\..\..\tests\datagen.c" />
+    <ClCompile Include="..\..\..\tests\datagencli.c" />
+    <ClCompile Include="..\..\..\tests\loremOut.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\programs\lorem.h" />
+    <ClInclude Include="..\..\..\tests\datagen.h" />
+    <ClInclude Include="..\..\..\tests\loremOut.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

lz4/build/VS2022/frametest/frametest.vcxproj

@@ -0,0 +1,182 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>frametest</RootNamespace>
+    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
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lz4/build/VS2022/fuzzer/fuzzer.vcxproj

@@ -0,0 +1,177 @@
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lz4/build/VS2022/liblz4-dll/liblz4-dll.rc

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

lz4/build/VS2022/liblz4-dll/liblz4-dll.vcxproj

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lz4/build/VS2022/liblz4/liblz4.vcxproj

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+    <RunCodeAnalysis>true</RunCodeAnalysis>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
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+      <TreatWarningAsError>true</TreatWarningAsError>
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+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreadedDebug</RuntimeLibrary>
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+    <ClCompile>
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+      <WarningLevel>Level4</WarningLevel>
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
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+      <PrecompiledHeader>
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+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
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+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
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+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;LZ4_DLL_EXPORT=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <EnablePREfast>true</EnablePREfast>
+      <AdditionalOptions>/analyze:stacksize295252 %(AdditionalOptions)</AdditionalOptions>
+      <RuntimeLibrary Condition="'$(UseStaticCRT)'=='true'">MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\lib\lz4.h" />
+    <ClInclude Include="..\..\..\lib\lz4frame.h" />
+    <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
+    <ClInclude Include="..\..\..\lib\lz4hc.h" />
+    <ClInclude Include="..\..\..\lib\xxhash.h" />
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+  <ItemGroup>
+    <ClCompile Include="..\..\..\lib\lz4.c" />
+    <ClCompile Include="..\..\..\lib\lz4frame.c" />
+    <ClCompile Include="..\..\..\lib\lz4hc.c" />
+    <ClCompile Include="..\..\..\lib\xxhash.c" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

lz4/build/VS2022/lz4.sln

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+EndProject
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lz4/build/VS2022/lz4/lz4.rc

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

lz4/build/VS2022/lz4/lz4.vcxproj

@@ -0,0 +1,189 @@
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+    <ProjectConfiguration Include="Release|Win32">
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+      <Platform>Win32</Platform>
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+      <Platform>x64</Platform>
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+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
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+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{60A3115E-B988-41EE-8815-F4D4F253D866}</ProjectGuid>
+    <RootNamespace>lz4</RootNamespace>
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+    <WholeProgramOptimization>true</WholeProgramOptimization>
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+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
+    <IncludePath>$(IncludePath);$(UniversalCRT_IncludePath);$(SolutionDir)..\..\lib;$(SolutionDir)..\..\programs;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <OptimizeReferences>false</OptimizeReferences>
+      <EnableCOMDATFolding>false</EnableCOMDATFolding>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\lib\lz4.c" />
+    <ClCompile Include="..\..\..\lib\lz4frame.c" />
+    <ClCompile Include="..\..\..\lib\lz4hc.c" />
+    <ClCompile Include="..\..\..\lib\xxhash.c" />
+    <ClCompile Include="..\..\..\programs\bench.c" />
+    <ClCompile Include="..\..\..\programs\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" />
+    <ClInclude Include="..\..\..\lib\lz4frame.h" />
+    <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
+    <ClInclude Include="..\..\..\lib\lz4hc.h" />
+    <ClInclude Include="..\..\..\lib\xxhash.h" />
+    <ClInclude Include="..\..\..\programs\bench.h" />
+    <ClInclude Include="..\..\..\programs\lorem.h" />
+    <ClInclude Include="..\..\..\programs\lz4io.h" />
+    <ClInclude Include="..\..\..\programs\util.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="lz4.rc" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

lz4/build/cmake/.gitignore

@@ -0,0 +1,10 @@
+# cmake build artefact
+
+CMakeCache.txt
+CMakeFiles
+*.cmake
+Makefile
+liblz4.pc
+lz4c
+install_manifest.txt
+build

lz4/build/cmake/CMakeLists.txt

@@ -0,0 +1,362 @@
+# CMake support for LZ4
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to
+# the public domain worldwide. This software is distributed without
+# any warranty.
+#
+# For details, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+
+# Use range version specification for policy control while maintaining 
+# compatibility with older CMake versions
+cmake_minimum_required(VERSION 3.5...4.0.2)
+
+set(LZ4_TOP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
+
+#-----------------------------------------------------------------------------
+# VERSION EXTRACTION - Parse version information from header file
+#-----------------------------------------------------------------------------
+function(parse_lz4_version VERSION_TYPE)
+    file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" version_line REGEX "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$")
+    string(REGEX REPLACE "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$" "\\1" version_number "${version_line}")
+    set(LZ4_VERSION_${VERSION_TYPE} ${version_number} PARENT_SCOPE)
+endfunction()
+
+foreach(version_type IN ITEMS MAJOR MINOR RELEASE)
+    parse_lz4_version(${version_type})
+endforeach()
+
+set(LZ4_VERSION_STRING "${LZ4_VERSION_MAJOR}.${LZ4_VERSION_MINOR}.${LZ4_VERSION_RELEASE}")
+mark_as_advanced(LZ4_VERSION_STRING LZ4_VERSION_MAJOR LZ4_VERSION_MINOR LZ4_VERSION_RELEASE)
+
+message(STATUS "Creating build script for LZ4 version: ${LZ4_VERSION_STRING}")
+
+project(LZ4 VERSION ${LZ4_VERSION_STRING} LANGUAGES C)
+
+#-----------------------------------------------------------------------------
+# DEFAULT BUILD TYPE - Set Release as default when no build type is specified
+#-----------------------------------------------------------------------------
+# Set a default build type if none was specified
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message(STATUS "Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+  # Set the possible values of build type for cmake-gui
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+
+#-----------------------------------------------------------------------------
+# BUILD OPTIONS - Configure build targets and features
+#-----------------------------------------------------------------------------
+option(LZ4_BUILD_CLI "Build lz4 program" ON)
+option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c program with legacy argument support" OFF)
+
+
+# Determine if LZ4 is being built as part of another project.
+# If LZ4 is bundled in another project, we don't want to install anything.
+# Default behavior can be overridden by setting the LZ4_BUNDLED_MODE variable.
+if(NOT DEFINED LZ4_BUNDLED_MODE)
+  get_directory_property(LZ4_IS_SUBPROJECT PARENT_DIRECTORY)
+  if(LZ4_IS_SUBPROJECT)
+    set(LZ4_BUNDLED_MODE ON)
+  else()
+    set(LZ4_BUNDLED_MODE OFF)
+  endif()
+endif()
+mark_as_advanced(LZ4_BUNDLED_MODE)
+
+#-----------------------------------------------------------------------------
+# PACKAGING - CPack configuration
+#-----------------------------------------------------------------------------
+if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
+  set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LZ4 compression library")
+  set(CPACK_PACKAGE_DESCRIPTION_FILE "${LZ4_TOP_SOURCE_DIR}/README.md")
+  set(CPACK_RESOURCE_FILE_LICENSE "${LZ4_TOP_SOURCE_DIR}/LICENSE")
+  set(CPACK_PACKAGE_VERSION_MAJOR ${LZ4_VERSION_MAJOR})
+  set(CPACK_PACKAGE_VERSION_MINOR ${LZ4_VERSION_MINOR})
+  set(CPACK_PACKAGE_VERSION_PATCH ${LZ4_VERSION_RELEASE})
+  include(CPack)
+endif(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
+
+#-----------------------------------------------------------------------------
+# LIBRARY TYPE CONFIGURATION - Static vs Shared libraries
+#-----------------------------------------------------------------------------
+# Allow people to choose whether to build shared or static libraries
+# via the BUILD_SHARED_LIBS option unless we are in bundled mode, in
+# which case we always use static libraries.
+include(CMakeDependentOption)
+CMAKE_DEPENDENT_OPTION(BUILD_SHARED_LIBS "Build shared libraries" ON "NOT LZ4_BUNDLED_MODE" OFF)
+CMAKE_DEPENDENT_OPTION(BUILD_STATIC_LIBS "Build static libraries" OFF "BUILD_SHARED_LIBS" ON)
+
+if(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
+  message(FATAL_ERROR "Both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS have been disabled")
+endif(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
+
+#-----------------------------------------------------------------------------
+# SOURCE FILES & DIRECTORIES - Path setup and source file collection
+#-----------------------------------------------------------------------------
+set(LZ4_LIB_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/lib")
+set(LZ4_PROG_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/programs")
+
+include_directories("${LZ4_LIB_SOURCE_DIR}")
+
+# CLI sources
+file(GLOB LZ4_SOURCES
+     "${LZ4_LIB_SOURCE_DIR}/*.c")
+file(GLOB LZ4_CLI_SOURCES
+     "${LZ4_PROG_SOURCE_DIR}/*.c")
+list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES}) # LZ4_CLI always use liblz4 sources directly.
+
+#-----------------------------------------------------------------------------
+# POSITION INDEPENDENT CODE - PIC settings for static libraries
+#-----------------------------------------------------------------------------
+# Whether to use position independent code for the static library.  If
+# we're building a shared library this is ignored and PIC is always
+# used.
+if(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT ON)
+else()
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT OFF)
+endif(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
+
+option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ${LZ4_POSITION_INDEPENDENT_LIB_DEFAULT})
+
+#-----------------------------------------------------------------------------
+# TARGETS - Library and executable targets
+#-----------------------------------------------------------------------------
+# liblz4
+include(GNUInstallDirs)
+set(LZ4_LIBRARIES_BUILT)
+if(BUILD_SHARED_LIBS)
+  add_library(lz4_shared SHARED ${LZ4_SOURCES})
+  target_include_directories(lz4_shared
+    PUBLIC $<BUILD_INTERFACE:${LZ4_LIB_SOURCE_DIR}>
+    INTERFACE $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+  set_target_properties(lz4_shared PROPERTIES
+    OUTPUT_NAME lz4
+    SOVERSION "${LZ4_VERSION_MAJOR}"
+    VERSION "${LZ4_VERSION_STRING}")
+  if(MSVC)
+    target_compile_definitions(lz4_shared PRIVATE
+      LZ4_DLL_EXPORT=1)
+  endif(MSVC)
+  list(APPEND LZ4_LIBRARIES_BUILT lz4_shared)
+endif()
+if(BUILD_STATIC_LIBS)
+  set(STATIC_LIB_NAME lz4)
+  if(MSVC AND BUILD_SHARED_LIBS)
+    set(STATIC_LIB_NAME lz4_static)
+  endif(MSVC AND BUILD_SHARED_LIBS)
+  add_library(lz4_static STATIC ${LZ4_SOURCES})
+  target_include_directories(lz4_static
+    PUBLIC $<BUILD_INTERFACE:${LZ4_LIB_SOURCE_DIR}>
+    INTERFACE $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+  set_target_properties(lz4_static PROPERTIES
+    OUTPUT_NAME ${STATIC_LIB_NAME}
+    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(BUILD_SHARED_LIBS)
+
+#-----------------------------------------------------------------------------
+# DEBUG CONFIGURATION - Configurable LZ4_DEBUG level
+#-----------------------------------------------------------------------------
+# LZ4_DEBUG levels:
+# 0 - Disable everything (default for Release)
+# 1 - Enable assert() statements  
+# 2-8 - Enable debug traces with increasing verbosity
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(LZ4_DEBUG_LEVEL_DEFAULT 1)
+else()
+  set(LZ4_DEBUG_LEVEL_DEFAULT 0)
+endif()
+
+set(LZ4_DEBUG_LEVEL ${LZ4_DEBUG_LEVEL_DEFAULT} CACHE STRING 
+    "LZ4 debug level: 0=disabled, 1=assert(), 2-8=debug traces with increasing verbosity")
+set_property(CACHE LZ4_DEBUG_LEVEL PROPERTY STRINGS "0" "1" "2" "3" "4" "5" "6" "7" "8")
+
+# Apply LZ4_DEBUG configuration if level > 0
+if(LZ4_DEBUG_LEVEL GREATER 0)
+  if(MSVC)
+    add_definitions(/DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  else()
+    add_definitions(-DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  endif()
+endif()
+
+#-----------------------------------------------------------------------------
+# NAMESPACE CONFIGURATION - xxHash namespace settings
+#-----------------------------------------------------------------------------
+# xxhash namespace
+if(BUILD_SHARED_LIBS)
+  target_compile_definitions(lz4_shared PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_SHARED_LIBS)
+if(BUILD_STATIC_LIBS)
+  target_compile_definitions(lz4_static PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_STATIC_LIBS)
+
+#-----------------------------------------------------------------------------
+# CLI EXECUTABLES - Configuring command-line programs
+#-----------------------------------------------------------------------------
+# lz4
+if(LZ4_BUILD_CLI)
+  set(LZ4_PROGRAMS_BUILT lz4cli)
+  add_executable(lz4cli ${LZ4_CLI_SOURCES})
+  set_target_properties(lz4cli PROPERTIES OUTPUT_NAME lz4)
+endif(LZ4_BUILD_CLI)
+
+# lz4c
+if(LZ4_BUILD_LEGACY_LZ4C)
+  list(APPEND LZ4_PROGRAMS_BUILT lz4c)
+  add_executable(lz4c ${LZ4_CLI_SOURCES})
+  set_target_properties(lz4c PROPERTIES COMPILE_DEFINITIONS "ENABLE_LZ4C_LEGACY_OPTIONS")
+endif(LZ4_BUILD_LEGACY_LZ4C)
+
+#-----------------------------------------------------------------------------
+# COMPILER FLAGS - Configure warning flags and compiler-specific options
+#-----------------------------------------------------------------------------
+# Extra warning flags
+if(MSVC)
+  set(CMAKE_C_FLAGS_DEBUG "${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(MSVC)
+
+
+#-----------------------------------------------------------------------------
+# INSTALLATION - Install targets, headers, and documentation
+#-----------------------------------------------------------------------------
+if(NOT LZ4_BUNDLED_MODE)
+  install(TARGETS ${LZ4_PROGRAMS_BUILT}
+    BUNDLE	DESTINATION "${CMAKE_INSTALL_BINDIR}"
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+  install(TARGETS ${LZ4_LIBRARIES_BUILT}
+    EXPORT lz4Targets
+    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+  install(FILES
+    "${LZ4_LIB_SOURCE_DIR}/lz4.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4hc.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4file.h"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
+  install(FILES "${LZ4_PROG_SOURCE_DIR}/lz4.1"
+    DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
+  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblz4.pc"
+    DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+#-----------------------------------------------------------------------------
+# CMAKE PACKAGE CONFIG - Configure CMake package for find_package support
+#-----------------------------------------------------------------------------
+  include(CMakePackageConfigHelpers)
+  write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake"
+    VERSION ${LZ4_VERSION_STRING}
+    COMPATIBILITY SameMajorVersion)
+
+  set(LZ4_PKG_INSTALLDIR "${CMAKE_INSTALL_LIBDIR}/cmake/lz4")
+  configure_package_config_file(
+    "${CMAKE_CURRENT_LIST_DIR}/lz4Config.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/lz4Config.cmake"
+    INSTALL_DESTINATION ${LZ4_PKG_INSTALLDIR})
+  export(EXPORT lz4Targets
+    FILE ${CMAKE_CURRENT_BINARY_DIR}/lz4Targets.cmake
+    NAMESPACE LZ4::)
+
+  install(EXPORT lz4Targets
+    FILE lz4Targets.cmake
+    NAMESPACE LZ4::
+    DESTINATION ${LZ4_PKG_INSTALLDIR})
+  install(FILES
+      ${CMAKE_CURRENT_BINARY_DIR}/lz4Config.cmake
+      ${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake
+    DESTINATION ${LZ4_PKG_INSTALLDIR})
+
+#-----------------------------------------------------------------------------
+# SYMLINKS - Create and install Unix symlinks and manpage aliases
+#-----------------------------------------------------------------------------
+  # Install lz4cat and unlz4 symlinks on Unix systems
+  if(UNIX AND LZ4_BUILD_CLI)
+    foreach(cli_tool IN ITEMS lz4cat unlz4)
+      # Create a custom target for the symlink creation
+      add_custom_target("create_${cli_tool}_symlink" ALL
+        COMMAND ${CMAKE_COMMAND} -E create_symlink
+          $<TARGET_FILE_NAME:lz4cli> ${cli_tool}
+        DEPENDS lz4cli
+        COMMENT "Creating symlink for ${cli_tool}"
+        VERBATIM)
+
+      # Install the symlink into the binary installation directory
+      install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${cli_tool}"
+        DESTINATION ${CMAKE_INSTALL_BINDIR}
+        RENAME ${cli_tool})
+    endforeach()
+
+    # create manpage aliases
+    foreach(f lz4cat unlz4)
+      file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/${f}.1" ".so man1/lz4.1\n")
+      install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${f}.1"
+        DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
+    endforeach()
+  endif(UNIX AND LZ4_BUILD_CLI)
+endif(NOT LZ4_BUNDLED_MODE)
+
+#-----------------------------------------------------------------------------
+# PKG-CONFIG - Generate and install pkg-config file
+#-----------------------------------------------------------------------------
+# pkg-config
+set(PREFIX "${CMAKE_INSTALL_PREFIX}")
+
+if("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+  set(LIBDIR "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
+else()
+  set(LIBDIR "${CMAKE_INSTALL_FULL_LIBDIR}")
+endif("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+
+if("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+  set(INCLUDEDIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+else()
+  set(INCLUDEDIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
+endif("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+
+# for liblz4.pc substitution
+set(VERSION ${LZ4_VERSION_STRING})
+configure_file(${LZ4_LIB_SOURCE_DIR}/liblz4.pc.in liblz4.pc @ONLY)

lz4/build/cmake/lz4Config.cmake.in

@@ -0,0 +1,10 @@
+@PACKAGE_INIT@
+include( "${CMAKE_CURRENT_LIST_DIR}/lz4Targets.cmake" )
+if(NOT TARGET lz4::lz4)
+    add_library(lz4::lz4 INTERFACE IMPORTED)
+    if("@BUILD_SHARED_LIBS@")
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_shared)
+    else()
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_static)
+    endif()
+endif()

lz4/build/make/README.md

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

lz4/build/make/lz4defs.make

@@ -0,0 +1,120 @@
+# ################################################################
+# LZ4 - Makefile common definitions
+# Copyright (C) Yann Collet 2020
+# All rights reserved.
+#
+# BSD license
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice, this
+#   list of conditions and the following disclaimer in the documentation and/or
+#   other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# You can contact the author at :
+#  - LZ4 source repository : https://github.com/lz4/lz4
+#  - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
+# ################################################################
+
+UNAME ?= uname
+
+TARGET_OS ?= $(shell $(UNAME))
+ifeq ($(TARGET_OS),)
+  TARGET_OS ?= $(OS)
+endif
+
+# Default to parallel builds unless a -j flag is already provided.
+ifeq (,$(filter -j%,$(MAKEFLAGS)))
+NPROC ?= $(shell nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
+MAKEFLAGS += -j$(NPROC)
+endif
+
+ifneq (,$(filter Windows%,$(TARGET_OS)))
+LIBLZ4_NAME = liblz4-$(LIBVER_MAJOR)
+LIBLZ4_EXP  = liblz4.lib
+WINBASED    = yes
+else
+LIBLZ4_EXP  = liblz4.dll.a
+  ifneq (,$(filter MINGW%,$(TARGET_OS)))
+LIBLZ4_NAME = liblz4
+WINBASED    = yes
+  else
+    ifneq (,$(filter MSYS%,$(TARGET_OS)))
+LIBLZ4_NAME = msys-lz4-$(LIBVER_MAJOR)
+WINBASED    = yes
+    else
+      ifneq (,$(filter CYGWIN%,$(TARGET_OS)))
+LIBLZ4_NAME = cyglz4-$(LIBVER_MAJOR)
+WINBASED    = yes
+      else
+LIBLZ4_NAME = liblz4
+WINBASED    = no
+EXT         =
+      endif
+    endif
+  endif
+endif
+
+ifeq ($(WINBASED),yes)
+EXT        = .exe
+WINDRES ?= windres
+LDFLAGS += -Wl,--force-exe-suffix
+endif
+
+LIBLZ4      = $(LIBLZ4_NAME).$(SHARED_EXT_VER)
+
+#determine if dev/nul based on host environment
+ifneq (,$(filter MINGW% MSYS% CYGWIN%,$(shell $(UNAME))))
+VOID := /dev/null
+else
+  ifneq (,$(filter Windows%,$(OS)))
+VOID := nul
+  else
+VOID  := /dev/null
+  endif
+endif
+
+ifneq (,$(filter Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku MidnightBSD MINGW% CYGWIN% MSYS% AIX,$(shell $(UNAME))))
+POSIX_ENV = Yes
+else
+POSIX_ENV = No
+endif
+
+# Avoid symlinks when targeting Windows or building on a Windows host
+ifeq ($(WINBASED),yes)
+LN_SF = cp -p
+else
+  ifneq (,$(filter MINGW% MSYS% CYGWIN%,$(shell $(UNAME))))
+LN_SF = cp -p
+  else
+    ifneq (,$(filter Windows%,$(OS)))
+LN_SF = cp -p
+    else
+LN_SF  = ln -sf
+    endif
+  endif
+endif
+
+ifneq (,$(filter $(shell $(UNAME)),SunOS))
+INSTALL ?= ginstall
+else
+INSTALL ?= install
+endif
+
+INSTALL_PROGRAM ?= $(INSTALL) -m 755
+INSTALL_DATA    ?= $(INSTALL) -m 644
+MAKE_DIR        ?= $(INSTALL) -d -m 755

lz4/build/make/multiconf.make

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

lz4/build/meson/GetLz4LibraryVersion.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# #############################################################################
+# Copyright (c) 2018-present    lzutao <taolzu(at)gmail.com>
+# 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).
+# #############################################################################
+import re
+
+
+def find_version_tuple(filepath):
+  version_file_data = None
+  with open(filepath) as fd:
+    version_file_data = fd.read()
+
+  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)
+  if version_match:
+    return version_match.groups()
+  raise Exception("Unable to find version string.")
+
+
+def main():
+  import argparse
+  parser = argparse.ArgumentParser(description='Print lz4 version from lib/lz4.h')
+  parser.add_argument('file', help='path to lib/lz4.h')
+  args = parser.parse_args()
+  version_tuple = find_version_tuple(args.file)
+  print('.'.join(version_tuple))
+
+
+if __name__ == '__main__':
+  main()

lz4/build/meson/README.md

@@ -0,0 +1,34 @@
+Meson build system for lz4
+==========================
+
+Meson is a build system designed to optimize programmer productivity.
+It aims to do this by providing simple, out-of-the-box support for
+modern software development tools and practices, such as unit tests,
+coverage reports, Valgrind, CCache and the like.
+
+This Meson build system is provided with no guarantee.
+
+## How to build
+
+`cd` to this meson directory (`build/meson`)
+
+```sh
+meson setup --buildtype=release -Ddefault_library=shared -Dprograms=true builddir
+cd builddir
+ninja             # to build
+ninja install     # to install
+```
+
+You might want to install it in staging directory:
+
+```sh
+DESTDIR=./staging ninja install
+```
+
+To configure build options, use:
+
+```sh
+meson configure
+```
+
+See [man meson(1)](https://manpages.debian.org/testing/meson/meson.1.en.html).

lz4/build/meson/meson.build

@@ -0,0 +1,30 @@
+# #############################################################################
+# Copyright (c) 2018-present    lzutao <taolzu(at)gmail.com>
+# 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).
+# #############################################################################
+
+# This is a dummy meson file.
+# The intention is that it can be easily moved to the root of the project
+# (together with meson_options.txt) and packaged for wrapdb.
+
+project(
+  'lz4',
+  'c',
+  license: 'BSD-2-Clause-Patent AND GPL-2.0-or-later',
+  default_options: [
+    'buildtype=release',
+    'warning_level=3'
+  ],
+  version: run_command(
+    find_program('GetLz4LibraryVersion.py'),
+    '../../lib/lz4.h',
+    check: true
+  ).stdout().strip(),
+  meson_version: '>=0.58.0'
+)
+
+subdir('meson')

lz4/build/meson/meson/contrib/gen_manual/meson.build

@@ -0,0 +1,42 @@
+# #############################################################################
+# 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 = '../../../../..'
+
+add_languages('cpp', native: true)
+
+sources = files(
+  lz4_source_root / 'contrib/gen_manual/gen_manual.cpp'
+)
+
+gen_manual = executable(
+  'gen_manual',
+  sources,
+  native: true,
+  install: false
+)
+
+manual_pages = ['lz4', 'lz4frame']
+
+foreach mp : manual_pages
+  custom_target(
+    '@0@_manual.html'.format(mp),
+    build_by_default: true,
+    input: lz4_source_root / 'lib/@0@.h'.format(mp),
+    output: '@0@_manual.html'.format(mp),
+    command: [
+      gen_manual,
+      meson.project_version(),
+      '@INPUT@',
+      '@OUTPUT@',
+    ],
+    install: false
+  )
+endforeach

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

@@ -0,0 +1,11 @@
+# #############################################################################
+# 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).
+# #############################################################################
+
+subdir('gen_manual')

lz4/build/meson/meson/examples/meson.build

@@ -0,0 +1,32 @@
+# #############################################################################
+# 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 = '../../../..'
+
+examples = {
+  'print_version': 'print_version.c',
+  'blockStreaming_doubleBuffer': 'blockStreaming_doubleBuffer.c',
+  'dictionaryRandomAccess': 'dictionaryRandomAccess.c',
+  'blockStreaming_ringBuffer': 'blockStreaming_ringBuffer.c',
+  'streamingHC_ringBuffer': 'streamingHC_ringBuffer.c',
+  'blockStreaming_lineByLine': 'blockStreaming_lineByLine.c',
+  'frameCompress': 'frameCompress.c',
+  'bench_functions': 'bench_functions.c',
+  'simple_buffer': 'simple_buffer.c',
+}
+
+foreach e, src : examples
+  executable(
+    e,
+    lz4_source_root / 'examples' / src,
+    dependencies: [liblz4_internal_dep],
+    install: false
+  )
+endforeach

lz4/build/meson/meson/lib/meson.build

@@ -0,0 +1,87 @@
+# #############################################################################
+# 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 = '../../../..'
+
+sources = files(
+  lz4_source_root / 'lib/lz4.c',
+  lz4_source_root / 'lib/lz4frame.c',
+  lz4_source_root / 'lib/lz4hc.c',
+  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
+
+liblz4 = library(
+  'lz4',
+  sources,
+  c_args: c_args,
+  install: true,
+  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')
+)
+
+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
+
+pkgconfig.generate(
+  liblz4,
+  name: 'lz4',
+  filebase: 'liblz4',
+  description: 'extremely fast lossless compression algorithm library',
+  version: meson.project_version(),
+  url: 'http://www.lz4.org/'
+)
+
+install_headers(
+  lz4_source_root / 'lib/lz4.h',
+  lz4_source_root / 'lib/lz4hc.h',
+  lz4_source_root / 'lib/lz4frame.h'
+)
+
+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/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/build/meson/meson/ossfuzz/meson.build

@@ -0,0 +1,37 @@
+lz4_source_root = '../../../..'
+
+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/@0@.c'.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/build/meson/meson/programs/meson.build

@@ -0,0 +1,91 @@
+# #############################################################################
+# 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 = '../../../..'
+
+# 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/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] + 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',
+    '-s',
+    '-f',
+    fs.name(lz4.full_path()),
+    '@OUTPUT@'
+  ]
+)
+
+unlz4 = custom_target(
+  'unlz4',
+  input: lz4,
+  output: 'unlz4',
+  command: [
+    'ln',
+    '-s',
+    '-f',
+    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')
+  foreach alias : ['lz4c', 'lz4cat', 'unlz4']
+    install_symlink(
+      alias,
+      install_dir: get_option('bindir'),
+      pointing_to: 'lz4'
+    )
+    install_symlink(
+      '@0@.1'.format(alias),
+      install_dir: get_option('mandir') / 'man1',
+      pointing_to: 'lz4.1'
+    )
+  endforeach
+endif

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

@@ -0,0 +1,165 @@
+# #############################################################################
+# 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',
+      lz4_source_root / 'lib/lz4file.c',
+    ),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['-v', '-T@0@s'.format(fuzzer_time)],
+    'test': false,
+  },
+  'freestanding': {
+    'sources': files(lz4_source_root / 'tests/freestanding.c'),
+    'c_args': ['-ffreestanding', '-fno-stack-protector', '-Wno-unused-parameter', '-Wno-declaration-after-statement', '-DLZ4_DEBUG=0'],
+    'link_args': ['-nostdlib'],
+    'build': cc.get_id() in ['gcc', 'clang'] and
+      host_machine.system() == 'linux' and host_machine.cpu_family() == 'x86_64',
+    '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-@0@.sh'.format(s))
+
+  test(
+    '@0@'.format(s),
+    script,
+    depends: attrs.get('depends', []),
+    workdir: fs.parent(script.full_path()),
+    env: run_env,
+    timeout: 360
+  )
+endforeach

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/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/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/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/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/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/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/contrib/djgpp/LICENSE

@@ -0,0 +1,24 @@
+Copyright (c) 2014, lpsantil
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

lz4/contrib/djgpp/Makefile

@@ -0,0 +1,130 @@
+# Copyright (c) 2015, Louis P. Santillan <lpsantil@gmail.com>
+# All rights reserved.
+# See LICENSE for licensing details.
+DESTDIR ?= /opt/local
+
+# Pulled the code below from lib/Makefile.  Might be nicer to derive this somehow without sed
+# Version numbers
+VERSION ?= 129
+RELEASE ?= r$(VERSION)
+LIBVER_MAJOR=$(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)
+
+######################################################################
+
+CROSS ?= i586-pc-msdosdjgpp
+CC = $(CROSS)-gcc
+AR = $(CROSS)-ar
+LD = $(CROSS)-gcc
+
+CFLAGS ?= -O3 -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -Wpedantic -DLZ4_VERSION=\"$(RELEASE)\"
+LDFLAGS ?= -s
+SRC = programs/bench.c programs/lz4io.c programs/lz4cli.c
+OBJ = $(SRC:.c=.o)
+SDEPS = $(SRC:.c=.d)
+IDIR = lib
+EDIR = .
+EXE = lz4.exe
+LNK = lz4
+LDIR = lib
+LSRC = lib/lz4.c lib/lz4hc.c lib/lz4frame.c lib/xxhash.c
+INC = $(LSRC:.c=.h)
+LOBJ = $(LSRC:.c=.o)
+LSDEPS = $(LSRC:.c=.d)
+LIB = $(LDIR)/lib$(LNK).a
+
+# Since LDFLAGS defaults to "-s", probably better to override unless
+# you have a default you would like to maintain
+ifeq ($(WITH_DEBUG), 1)
+	CFLAGS += -g
+	LDFLAGS += -g
+endif
+
+# Since LDFLAGS defaults to "-s", probably better to override unless
+# you have a default you would like to maintain
+ifeq ($(WITH_PROFILING), 1)
+	CFLAGS += -pg
+	LDFLAGS += -pg
+endif
+
+%.o: %.c $(INC) Makefile
+	$(CC) $(CFLAGS) -MMD -MP -I$(IDIR) -c $< -o $@
+
+%.exe: %.o $(LIB) Makefile
+	$(LD) $< -L$(LDIR) -l$(LNK) $(LDFLAGS) $(LIBDEP) -o $@
+
+######################################################################
+######################## DO NOT MODIFY BELOW #########################
+######################################################################
+
+.PHONY: all install uninstall showconfig gstat gpush
+
+all: $(LIB) $(EXE)
+
+$(LIB): $(LOBJ)
+	$(AR) -rcs $@ $^
+
+$(EXE): $(LOBJ) $(OBJ)
+	$(LD) $(LDFLAGS) $(LOBJ) $(OBJ) -o $(EDIR)/$@
+
+clean:
+	rm -f $(OBJ) $(EXE) $(LOBJ) $(LIB) *.tmp $(SDEPS) $(LSDEPS) $(TSDEPS)
+
+install: $(INC) $(LIB) $(EXE)
+	mkdir -p $(DESTDIR)/bin $(DESTDIR)/include $(DESTDIR)/lib
+	rm -f .footprint
+	echo $(DESTDIR)/bin/$(EXE) >> .footprint
+	cp -v $(EXE) $(DESTDIR)/bin/
+	@for T in $(LIB); \
+	do ( \
+		echo $(DESTDIR)/$$T >> .footprint; \
+		cp -v --parents $$T $(DESTDIR) \
+	); done
+	@for T in $(INC); \
+	do ( \
+		echo $(DESTDIR)/include/`basename -a $$T` >> .footprint; \
+		cp -v $$T $(DESTDIR)/include/ \
+	); done
+
+uninstall: .footprint
+	@for T in $(shell cat .footprint); do rm -v $$T; done
+
+-include $(SDEPS) $(LSDEPS)
+
+showconfig:
+	@echo "PWD="$(PWD)
+	@echo "VERSION="$(VERSION)
+	@echo "RELEASE="$(RELEASE)
+	@echo "LIBVER_MAJOR="$(LIBVER_MAJOR)
+	@echo "LIBVER_MINOR="$(LIBVER_MINOR)
+	@echo "LIBVER_PATCH="$(LIBVER_PATCH)
+	@echo "LIBVER="$(LIBVER)
+	@echo "CROSS="$(CROSS)
+	@echo "CC="$(CC)
+	@echo "AR="$(AR)
+	@echo "LD="$(LD)
+	@echo "DESTDIR="$(DESTDIR)
+	@echo "CFLAGS="$(CFLAGS)
+	@echo "LDFLAGS="$(LDFLAGS)
+	@echo "SRC="$(SRC)
+	@echo "OBJ="$(OBJ)
+	@echo "IDIR="$(IDIR)
+	@echo "INC="$(INC)
+	@echo "EDIR="$(EDIR)
+	@echo "EXE="$(EXE)
+	@echo "LDIR="$(LDIR)
+	@echo "LSRC="$(LSRC)
+	@echo "LOBJ="$(LOBJ)
+	@echo "LNK="$(LNK)
+	@echo "LIB="$(LIB)
+	@echo "SDEPS="$(SDEPS)
+	@echo "LSDEPS="$(LSDEPS)
+
+gstat:
+	git status
+
+gpush:
+	git commit
+	git push

lz4/contrib/djgpp/README.MD

@@ -0,0 +1,21 @@
+# lz4 for DOS/djgpp
+This file details on how to compile lz4.exe, and liblz4.a for use on DOS/djgpp using
+Andrew Wu's build-djgpp cross compilers ([GH][0], [Binaries][1]) on OSX, Linux.
+
+## Setup
+* Download a djgpp tarball [binaries][1] for your platform.  
+* Extract and install it (`tar jxvf djgpp-linux64-gcc492.tar.bz2`).  Note the path.  We'll assume `/home/user/djgpp`.
+* Add the `bin` folder to your `PATH`.  In bash, do `export PATH=/home/user/djgpp/bin:$PATH`.
+* The `Makefile` in `contrib/djgpp/` sets up `CC`, `AR`, `LD` for you.  So, `CC=i586-pc-msdosdjgpp-gcc`, `AR=i586-pc-msdosdjgpp-ar`, `LD=i586-pc-msdosdjgpp-gcc`.
+
+## Building LZ4 for DOS
+In the base dir of lz4 and with `contrib/djgpp/Makefile`, try:
+Try:
+* `make -f contrib/djgpp/Makefile`
+* `make -f contrib/djgpp/Makefile liblz4.a`
+* `make -f contrib/djgpp/Makefile lz4.exe`
+* `make -f contrib/djgpp/Makefile DESTDIR=/home/user/dos install`, however it doesn't make much sense on a \*nix.
+* You can also do `make -f contrib/djgpp/Makefile uninstall`
+
+[0]: https://github.com/andrewwutw/build-djgpp
+[1]: https://github.com/andrewwutw/build-djgpp/releases

lz4/contrib/gen_manual/.gitignore

@@ -0,0 +1,2 @@
+# build artefact
+gen_manual

lz4/contrib/gen_manual/Makefile

@@ -0,0 +1,76 @@
+# ################################################################
+# Copyright (C) Przemyslaw Skibinski 2016-present
+# All rights reserved.
+#
+# BSD license
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice, this
+#   list of conditions and the following disclaimer in the documentation and/or
+#   other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# You can contact the author at :
+#  - LZ4 source repository : https://github.com/Cyan4973/lz4
+#  - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
+# ################################################################
+
+
+CXXFLAGS ?= -O2
+CXXFLAGS += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wno-comment
+CPPFLAGS += $(MOREFLAGS)
+FLAGS   = $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)
+
+LZ4API = ../../lib/lz4.h
+LZ4MANUAL = ../../doc/lz4_manual.html
+LZ4FAPI = ../../lib/lz4frame.h
+LZ4FMANUAL = ../../doc/lz4frame_manual.html
+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 $(LIBVER_SCRIPT))
+
+# Define *.exe as extension for Windows systems
+ifneq (,$(filter Windows%,$(OS)))
+EXT =.exe
+else
+EXT =
+endif
+
+
+.PHONY: default
+default: gen_manual
+
+gen_manual: gen_manual.cpp
+	$(CXX) $(FLAGS) $^ -o $@$(EXT)
+
+$(LZ4MANUAL) : gen_manual $(LZ4API)
+	echo "Update lz4 manual in /doc"
+	./gen_manual $(LZ4VER) $(LZ4API) $@
+
+$(LZ4FMANUAL) : gen_manual $(LZ4FAPI)
+	echo "Update lz4frame manual in /doc"
+	./gen_manual $(LZ4VER) $(LZ4FAPI) $@
+
+.PHONY: manuals
+manuals: $(LZ4MANUAL) $(LZ4FMANUAL)
+
+.PHONY: clean
+clean:
+	@$(RM) gen_manual$(EXT)
+	@echo Cleaning completed

lz4/contrib/gen_manual/README.md

@@ -0,0 +1,31 @@
+gen_manual - a program for automatic generation of manual from source code
+==========================================================================
+
+#### Introduction
+
+This simple C++ program generates a single-page HTML manual from `lz4.h`.
+
+The format of recognized comment blocks is following:
+- comments of type `/*!` mean: this is a function declaration; switch comments with declarations
+- comments of type `/**` and `/*-` mean: this is a comment; use a `<H2>` header for the first line
+- comments of type `/*=` and `/**=` mean: use a `<H3>` header and show also all functions until first empty line
+- comments of type `/*X` where `X` is different from above-mentioned are ignored
+
+Moreover:
+- `LZ4LIB_API` is removed to improve readability
+- `typedef` are detected and included even if uncommented
+- comments of type `/**<` and `/*!<` are detected and only function declaration is highlighted (bold)
+
+
+#### Usage
+
+The program requires 3 parameters:
+```
+gen_manual [lz4_version] [input_file] [output_html]
+```
+
+To compile program and generate lz4 manual we have used:
+```
+make
+./gen_manual.exe 1.7.3 ../../lib/lz4.h lz4_manual.html
+```