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Windows build: implement LZ4 library inside the project tree

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Edouard Griffiths 2016-03-09 18:32:03 +01:00
parent b1cc7f2306
commit 310c169819
15 changed files with 5967 additions and 1 deletions
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LZ4 Library
Copyright (c) 2011-2014, Yann Collet
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.

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# ################################################################
# LZ4 library - Makefile
# Copyright (C) Yann Collet 2011-2015
# 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
# ################################################################
# Version numbers
VERSION ?= 129
LIBVER_MAJOR=`sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lz4.h`
LIBVER_MINOR=`sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lz4.h`
LIBVER_PATCH=`sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lz4.h`
LIBVER=$(LIBVER_MAJOR).$(LIBVER_MINOR).$(LIBVER_PATCH)
DESTDIR?=
PREFIX ?= /usr/local
CFLAGS ?= -O3
CFLAGS += -I. -std=c99 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Wcast-qual -Wstrict-prototypes -pedantic -DXXH_NAMESPACE=LZ4_
LIBDIR?= $(PREFIX)/lib
INCLUDEDIR=$(PREFIX)/include
# OS X linker doesn't support -soname, and use different extension
# see : https://developer.apple.com/library/mac/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryDesignGuidelines.html
ifeq ($(shell uname), Darwin)
SHARED_EXT = dylib
SHARED_EXT_MAJOR = $(LIBVER_MAJOR).$(SHARED_EXT)
SHARED_EXT_VER = $(LIBVER).$(SHARED_EXT)
SONAME_FLAGS = -install_name $(PREFIX)/lib/liblz4.$(SHARED_EXT_MAJOR) -compatibility_version $(LIBVER_MAJOR) -current_version $(LIBVER)
else
SONAME_FLAGS = -Wl,-soname=liblz4.$(SHARED_EXT).$(LIBVER_MAJOR)
SHARED_EXT = so
SHARED_EXT_MAJOR = $(SHARED_EXT).$(LIBVER_MAJOR)
SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
endif
default: liblz4
all: liblz4
liblz4: lz4.c lz4hc.c lz4frame.c xxhash.c
@echo compiling static library
@$(CC) $(CPPFLAGS) $(CFLAGS) -c $^
@$(AR) rcs liblz4.a lz4.o lz4hc.o lz4frame.o xxhash.o
@echo compiling dynamic library $(LIBVER)
@$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -shared $^ -fPIC $(SONAME_FLAGS) -o $@.$(SHARED_EXT_VER)
@echo creating versioned links
@ln -sf $@.$(SHARED_EXT_VER) $@.$(SHARED_EXT_MAJOR)
@ln -sf $@.$(SHARED_EXT_VER) $@.$(SHARED_EXT)
clean:
@rm -f core *.o *.a *.$(SHARED_EXT) *.$(SHARED_EXT).* liblz4.pc
@echo Cleaning library completed
#------------------------------------------------------------------------
#make install is validated only for Linux, OSX, kFreeBSD and Hurd targets
ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU))
liblz4.pc: liblz4.pc.in Makefile
@echo creating pkgconfig
@sed -e 's|@PREFIX@|$(PREFIX)|' \
-e 's|@LIBDIR@|$(LIBDIR)|' \
-e 's|@INCLUDEDIR@|$(INCLUDEDIR)|' \
-e 's|@VERSION@|$(VERSION)|' \
$< >$@
install: liblz4 liblz4.pc
@install -d -m 755 $(DESTDIR)$(LIBDIR)/pkgconfig/ $(DESTDIR)$(INCLUDEDIR)/
@install -m 755 liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(LIBDIR)/liblz4.$(SHARED_EXT_VER)
@cp -a liblz4.$(SHARED_EXT_MAJOR) $(DESTDIR)$(LIBDIR)
@cp -a liblz4.$(SHARED_EXT) $(DESTDIR)$(LIBDIR)
@cp -a liblz4.pc $(DESTDIR)$(LIBDIR)/pkgconfig/
@install -m 644 liblz4.a $(DESTDIR)$(LIBDIR)/liblz4.a
@install -m 644 lz4.h $(DESTDIR)$(INCLUDEDIR)/lz4.h
@install -m 644 lz4hc.h $(DESTDIR)$(INCLUDEDIR)/lz4hc.h
@install -m 644 lz4frame.h $(DESTDIR)$(INCLUDEDIR)/lz4frame.h
@echo lz4 static and shared library installed
uninstall:
@rm -f $(DESTDIR)$(LIBDIR)/liblz4.$(SHARED_EXT)
@rm -f $(DESTDIR)$(LIBDIR)/liblz4.$(SHARED_EXT_MAJOR)
@rm -f $(DESTDIR)$(LIBDIR)/pkgconfig/liblz4.pc
@[ -x $(DESTDIR)$(LIBDIR)/liblz4.$(SHARED_EXT_VER) ] && rm -f $(DESTDIR)$(LIBDIR)/liblz4.$(SHARED_EXT_VER)
@[ -f $(DESTDIR)$(LIBDIR)/liblz4.a ] && rm -f $(DESTDIR)$(LIBDIR)/liblz4.a
@[ -f $(DESTDIR)$(INCLUDEDIR)/lz4.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/lz4.h
@[ -f $(DESTDIR)$(INCLUDEDIR)/lz4hc.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/lz4hc.h
@[ -f $(DESTDIR)$(INCLUDEDIR)/lz4frame.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/lz4frame.h
@echo lz4 libraries successfully uninstalled
endif

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LZ4 - Library Files
================================
The __lib__ directory contains several files, but you don't necessarily need them all.
To integrate fast LZ4 compression/decompression into your program, you basically just need "**lz4.c**" and "**lz4.h**".
For more compression at the cost of compression speed (while preserving decompression speed), use **lz4hc** on top of regular lz4. `lz4hc` only provides compression functions. It also needs `lz4` to compile properly.
If you want to produce files or data streams compatible with `lz4` command line utility, use **lz4frame**. This library encapsulates lz4-compressed blocks into the [official interoperable frame format]. In order to work properly, lz4frame needs lz4 and lz4hc, and also **xxhash**, which provides error detection algorithm.
(_Advanced stuff_ : It's possible to hide xxhash symbols into a local namespace. This is what `liblz4` does, to avoid symbol duplication in case a user program would link to several libraries containing xxhash symbols.)
A more complex "lz4frame_static.h" is also provided, although its usage is not recommended. It contains definitions which are not guaranteed to remain stable within future versions. Use for static linking ***only***.
The other files are not source code. There are :
- LICENSE : contains the BSD license text
- Makefile : script to compile or install lz4 library (static or dynamic)
- liblz4.pc.in : for pkg-config (make install)
[official interoperable frame format]: ../lz4_Frame_format.md

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# LZ4 - Fast LZ compression algorithm
# Copyright (C) 2011-2014, Yann Collet.
# BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
prefix=@PREFIX@
libdir=@LIBDIR@
includedir=@INCLUDEDIR@
Name: lz4
Description: fast lossless compression algorithm library
URL: http://code.google.com/p/lz4/
Version: @VERSION@
Libs: -L@LIBDIR@ -llz4
Cflags: -I@INCLUDEDIR@

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/*
LZ4 - Fast LZ compression algorithm
Header File
Copyright (C) 2011-2015, 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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/*
* lz4.h provides block compression functions, and gives full buffer control to programmer.
* If you need to generate inter-operable compressed data (respecting LZ4 frame specification),
* and can let the library handle its own memory, please use lz4frame.h instead.
*/
/**************************************
* Version
**************************************/
#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
#define LZ4_VERSION_MINOR 7 /* for new (non-breaking) interface capabilities */
#define LZ4_VERSION_RELEASE 1 /* for tweaks, bug-fixes, or development */
#define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
int LZ4_versionNumber (void);
/**************************************
* Tuning parameter
**************************************/
/*
* LZ4_MEMORY_USAGE :
* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
* Increasing memory usage improves compression ratio
* Reduced memory usage can improve speed, due to cache effect
* Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
*/
#define LZ4_MEMORY_USAGE 14
/**************************************
* Simple Functions
**************************************/
int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
/*
LZ4_compress_default() :
Compresses 'sourceSize' bytes from buffer 'source'
into already allocated 'dest' buffer of size 'maxDestSize'.
Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
It also runs faster, so it's a recommended setting.
If the function cannot compress 'source' into a more limited 'dest' budget,
compression stops *immediately*, and the function result is zero.
As a consequence, 'dest' content is not valid.
This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
or 0 if compression fails
LZ4_decompress_safe() :
compressedSize : is the precise full size of the compressed block.
maxDecompressedSize : is the size of destination buffer, which must be already allocated.
return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
If destination buffer is not large enough, decoding will stop and output an error code (<0).
If the source stream is detected malformed, the function will stop decoding and return a negative result.
This function is protected against buffer overflow exploits, including malicious data packets.
It never writes outside output buffer, nor reads outside input buffer.
*/
/**************************************
* 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() compress faster when dest buffer size 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 too large ( > LZ4_MAX_INPUT_SIZE)
*/
int LZ4_compressBound(int inputSize);
/*
LZ4_compress_fast() :
Same as LZ4_compress_default(), but allows to select an "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 ACCELERATION_DEFAULT (see lz4.c), which is 1.
*/
int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
/*
LZ4_compress_fast_extState() :
Same compression function, just using an externally allocated memory space to store compression state.
Use LZ4_sizeofState() to know how much memory must be allocated,
and allocate it on 8-bytes boundaries (using malloc() typically).
Then, provide it as 'void* state' to compression function.
*/
int LZ4_sizeofState(void);
int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
/*
LZ4_compress_destSize() :
Reverse the logic, by compressing as much data as possible from 'source' buffer
into already allocated buffer 'dest' of size 'targetDestSize'.
This function either compresses the entire 'source' content into 'dest' if it's large enough,
or fill 'dest' buffer completely with as much data as possible from 'source'.
*sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
New value is necessarily <= old value.
return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
or 0 if compression fails
*/
int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
/*
LZ4_decompress_fast() :
originalSize : is the original and therefore uncompressed size
return : the number of bytes read from the source buffer (in other words, the compressed size)
If the source stream is detected malformed, the function will stop decoding and return a negative result.
Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
note : This function fully respect memory boundaries for properly formed compressed data.
It is a bit faster than LZ4_decompress_safe().
However, it does not provide any protection against intentionally modified data stream (malicious input).
Use this function in trusted environment only (data to decode comes from a trusted source).
*/
int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
/*
LZ4_decompress_safe_partial() :
This function decompress a compressed block of size 'compressedSize' at position 'source'
into destination buffer 'dest' of size 'maxDecompressedSize'.
The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
reducing decompression time.
return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
Always control how many bytes were decoded.
If the source stream is detected malformed, the function will stop decoding and return a negative result.
This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
*/
int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
/***********************************************
* Streaming Compression Functions
***********************************************/
#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(long long))
/*
* LZ4_stream_t
* information structure to track an LZ4 stream.
* important : init this structure content before first use !
* note : only allocated directly the structure if you are statically linking LZ4
* If you are using liblz4 as a DLL, please use below construction methods instead.
*/
typedef struct { long long table[LZ4_STREAMSIZE_U64]; } LZ4_stream_t;
/*
* LZ4_resetStream
* Use this function to init an allocated LZ4_stream_t structure
*/
void LZ4_resetStream (LZ4_stream_t* streamPtr);
/*
* LZ4_createStream will allocate and initialize an LZ4_stream_t structure
* LZ4_freeStream releases its memory.
* In the context of a DLL (liblz4), please use these methods rather than the static struct.
* They are more future proof, in case of a change of LZ4_stream_t size.
*/
LZ4_stream_t* LZ4_createStream(void);
int LZ4_freeStream (LZ4_stream_t* streamPtr);
/*
* LZ4_loadDict
* Use this function to load a static dictionary into LZ4_stream.
* Any previous data will be forgotten, only 'dictionary' will remain in memory.
* Loading a size of 0 is allowed.
* Return : dictionary size, in bytes (necessarily <= 64 KB)
*/
int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
/*
* LZ4_compress_fast_continue
* Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
* Important : Previous data blocks are assumed to still be present and unmodified !
* 'dst' buffer must be already allocated.
* If maxDstSize >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
* If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function returns a zero.
*/
int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int maxDstSize, int acceleration);
/*
* LZ4_saveDict
* If previously compressed data block is not guaranteed to remain available at its memory location
* save it into a safer place (char* safeBuffer)
* Note : you don't need to call LZ4_loadDict() afterwards,
* dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue()
* Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error
*/
int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
/************************************************
* Streaming Decompression Functions
************************************************/
#define LZ4_STREAMDECODESIZE_U64 4
#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
typedef struct { unsigned long long table[LZ4_STREAMDECODESIZE_U64]; } LZ4_streamDecode_t;
/*
* LZ4_streamDecode_t
* information structure to track an LZ4 stream.
* init this structure content using LZ4_setStreamDecode or memset() before first use !
*
* In the context of a DLL (liblz4) please prefer usage of construction methods below.
* They are more future proof, in case of a change of LZ4_streamDecode_t size in the future.
* LZ4_createStreamDecode will allocate and initialize an LZ4_streamDecode_t structure
* LZ4_freeStreamDecode releases its memory.
*/
LZ4_streamDecode_t* LZ4_createStreamDecode(void);
int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
/*
* LZ4_setStreamDecode
* Use this function to instruct where to find the dictionary.
* Setting a size of 0 is allowed (same effect as reset).
* Return : 1 if OK, 0 if error
*/
int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
/*
*_continue() :
These decoding functions allow decompression of multiple blocks in "streaming" mode.
Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
In the case of a ring buffers, decoding buffer must be either :
- Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
- Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
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).
- _At least_ 64 KB + 8 bytes + maxBlockSize.
In which case, encoding and decoding buffers do not need to be synchronized,
and encoding ring buffer can have any size, including larger than decoding buffer.
Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
and indicate where it is saved using LZ4_setStreamDecode()
*/
int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
/*
Advanced decoding functions :
*_usingDict() :
These decoding functions work the same as
a combination of LZ4_setStreamDecode() followed by LZ4_decompress_x_continue()
They are stand-alone. They don't need nor update an LZ4_streamDecode_t structure.
*/
int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
/**************************************
* Obsolete Functions
**************************************/
/* Deprecate Warnings */
/* Should these warnings messages be a problem,
it is generally possible to disable them,
with -Wno-deprecated-declarations for gcc
or _CRT_SECURE_NO_WARNINGS in Visual for example.
You can also define LZ4_DEPRECATE_WARNING_DEFBLOCK. */
#ifndef LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
# if (LZ4_GCC_VERSION >= 405) || defined(__clang__)
# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
# elif (LZ4_GCC_VERSION >= 301)
# define LZ4_DEPRECATED(message) __attribute__((deprecated))
# elif defined(_MSC_VER)
# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
# else
# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
# define LZ4_DEPRECATED(message)
# endif
#endif /* LZ4_DEPRECATE_WARNING_DEFBLOCK */
/* Obsolete compression functions */
/* These functions are planned to start generate warnings by r131 approximately */
int LZ4_compress (const char* source, char* dest, int sourceSize);
int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
/* Obsolete decompression functions */
/* These function names are completely deprecated and must no longer be used.
They are only provided here for compatibility with older programs.
- LZ4_uncompress is the same as LZ4_decompress_fast
- LZ4_uncompress_unknownOutputSize is the same as LZ4_decompress_safe
These function prototypes are now disabled; uncomment them only if you really need them.
It is highly recommended to stop using these prototypes and migrate to maintained ones */
/* int LZ4_uncompress (const char* source, char* dest, int outputSize); */
/* int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize); */
/* Obsolete streaming functions; use new streaming interface whenever possible */
LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
/* Obsolete streaming decoding functions */
LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
#if defined (__cplusplus)
}
#endif

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#--------------------------------------------------------
#
# Pro file for Android and Windows builds with Qt Creator
#
#--------------------------------------------------------
QT += core
TEMPLATE = lib
TARGET = lz4
INCLUDEPATH += $$PWD
SOURCES = lz4core.c\
lz4frame.c\
lz4hc.c\
xxhash.c
HEADERS = lz4.h\
lz4frame_static.h\
lz4frame.h\
lz4hc.h\
xxhash.h
CONFIG(ANDROID):CONFIG += mobility
CONFIG(ANDROID):MOBILITY =

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/*
LZ4 auto-framing library
Header File
Copyright (C) 2011-2015, 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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/* LZ4F is a stand-alone API to create LZ4-compressed frames
* fully conformant to specification v1.5.1.
* All related operations, including memory management, are handled by the library.
* You don't need lz4.h when using lz4frame.h.
* */
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/**************************************
* Includes
**************************************/
#include <stddef.h> /* size_t */
/**************************************
* Error management
* ************************************/
typedef size_t LZ4F_errorCode_t;
unsigned LZ4F_isError(LZ4F_errorCode_t code);
const char* LZ4F_getErrorName(LZ4F_errorCode_t code); /* return error code string; useful for debugging */
/**************************************
* Frame compression types
* ************************************/
//#define LZ4F_DISABLE_OBSOLETE_ENUMS
#ifndef LZ4F_DISABLE_OBSOLETE_ENUMS
# define LZ4F_OBSOLETE_ENUM(x) ,x
#else
# define LZ4F_OBSOLETE_ENUM(x)
#endif
typedef enum {
LZ4F_default=0,
LZ4F_max64KB=4,
LZ4F_max256KB=5,
LZ4F_max1MB=6,
LZ4F_max4MB=7
LZ4F_OBSOLETE_ENUM(max64KB = LZ4F_max64KB)
LZ4F_OBSOLETE_ENUM(max256KB = LZ4F_max256KB)
LZ4F_OBSOLETE_ENUM(max1MB = LZ4F_max1MB)
LZ4F_OBSOLETE_ENUM(max4MB = LZ4F_max4MB)
} LZ4F_blockSizeID_t;
typedef enum {
LZ4F_blockLinked=0,
LZ4F_blockIndependent
LZ4F_OBSOLETE_ENUM(blockLinked = LZ4F_blockLinked)
LZ4F_OBSOLETE_ENUM(blockIndependent = LZ4F_blockIndependent)
} LZ4F_blockMode_t;
typedef enum {
LZ4F_noContentChecksum=0,
LZ4F_contentChecksumEnabled
LZ4F_OBSOLETE_ENUM(noContentChecksum = LZ4F_noContentChecksum)
LZ4F_OBSOLETE_ENUM(contentChecksumEnabled = LZ4F_contentChecksumEnabled)
} LZ4F_contentChecksum_t;
typedef enum {
LZ4F_frame=0,
LZ4F_skippableFrame
LZ4F_OBSOLETE_ENUM(skippableFrame = LZ4F_skippableFrame)
} LZ4F_frameType_t;
#ifndef LZ4F_DISABLE_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
typedef struct {
LZ4F_blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB ; 0 == default */
LZ4F_blockMode_t blockMode; /* blockLinked, blockIndependent ; 0 == default */
LZ4F_contentChecksum_t contentChecksumFlag; /* noContentChecksum, contentChecksumEnabled ; 0 == default */
LZ4F_frameType_t frameType; /* LZ4F_frame, skippableFrame ; 0 == default */
unsigned long long contentSize; /* Size of uncompressed (original) content ; 0 == unknown */
unsigned reserved[2]; /* must be zero for forward compatibility */
} LZ4F_frameInfo_t;
typedef struct {
LZ4F_frameInfo_t frameInfo;
int compressionLevel; /* 0 == default (fast mode); values above 16 count as 16; values below 0 count as 0 */
unsigned autoFlush; /* 1 == always flush (reduce need for tmp buffer) */
unsigned reserved[4]; /* must be zero for forward compatibility */
} LZ4F_preferences_t;
/***********************************
* Simple compression function
* *********************************/
size_t LZ4F_compressFrameBound(size_t srcSize, const LZ4F_preferences_t* preferencesPtr);
size_t LZ4F_compressFrame(void* dstBuffer, size_t dstMaxSize, const void* srcBuffer, size_t srcSize, const LZ4F_preferences_t* preferencesPtr);
/* LZ4F_compressFrame()
* Compress an entire srcBuffer into a valid LZ4 frame, as defined by specification v1.5.1
* The most important rule is that dstBuffer MUST be large enough (dstMaxSize) to ensure compression completion even in worst case.
* You can get the minimum value of dstMaxSize by using LZ4F_compressFrameBound()
* If this condition is not respected, LZ4F_compressFrame() will fail (result is an errorCode)
* The LZ4F_preferences_t structure is optional : you can provide NULL as argument. All preferences will be set to default.
* The result of the function is the number of bytes written into dstBuffer.
* The function outputs an error code if it fails (can be tested using LZ4F_isError())
*/
/**********************************
* Advanced compression functions
**********************************/
typedef struct LZ4F_cctx_s* LZ4F_compressionContext_t; /* must be aligned on 8-bytes */
typedef struct {
unsigned stableSrc; /* 1 == src content will remain available on future calls to LZ4F_compress(); avoid saving src content within tmp buffer as future dictionary */
unsigned reserved[3];
} LZ4F_compressOptions_t;
/* Resource Management */
#define LZ4F_VERSION 100
LZ4F_errorCode_t LZ4F_createCompressionContext(LZ4F_compressionContext_t* cctxPtr, unsigned version);
LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_compressionContext_t cctx);
/* LZ4F_createCompressionContext() :
* The first thing to do is to create a compressionContext object, which will be used in all compression operations.
* This is achieved using LZ4F_createCompressionContext(), which takes as argument a version and an LZ4F_preferences_t structure.
* The version provided MUST be LZ4F_VERSION. It is intended to track potential version differences between different binaries.
* The function will provide a pointer to a fully allocated LZ4F_compressionContext_t object.
* If the result LZ4F_errorCode_t is not zero, there was an error during context creation.
* Object can release its memory using LZ4F_freeCompressionContext();
*/
/* Compression */
size_t LZ4F_compressBegin(LZ4F_compressionContext_t cctx, void* dstBuffer, size_t dstMaxSize, const LZ4F_preferences_t* prefsPtr);
/* LZ4F_compressBegin() :
* will write the frame header into dstBuffer.
* dstBuffer must be large enough to accommodate a header (dstMaxSize). Maximum header size is 15 bytes.
* The LZ4F_preferences_t structure is optional : you can provide NULL as argument, all preferences will then be set to default.
* The result of the function is the number of bytes written into dstBuffer for the header
* or an error code (can be tested using LZ4F_isError())
*/
size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t* prefsPtr);
/* LZ4F_compressBound() :
* Provides the minimum size of Dst buffer given srcSize to handle worst case situations.
* Different preferences can produce different results.
* prefsPtr is optional : you can provide NULL as argument, all preferences will then be set to cover worst case.
* This function includes frame termination cost (4 bytes, or 8 if frame checksum is enabled)
*/
size_t LZ4F_compressUpdate(LZ4F_compressionContext_t cctx, void* dstBuffer, size_t dstMaxSize, const void* srcBuffer, size_t srcSize, const LZ4F_compressOptions_t* cOptPtr);
/* LZ4F_compressUpdate()
* LZ4F_compressUpdate() can be called repetitively to compress as much data as necessary.
* The most important rule is that dstBuffer MUST be large enough (dstMaxSize) to ensure compression completion even in worst case.
* You can get the minimum value of dstMaxSize by using LZ4F_compressBound().
* If this condition is not respected, LZ4F_compress() will fail (result is an errorCode).
* LZ4F_compressUpdate() doesn't guarantee error recovery, so you have to reset compression context when an error occurs.
* The LZ4F_compressOptions_t structure is optional : you can provide NULL as argument.
* The result of the function is the number of bytes written into dstBuffer : it can be zero, meaning input data was just buffered.
* The function outputs an error code if it fails (can be tested using LZ4F_isError())
*/
size_t LZ4F_flush(LZ4F_compressionContext_t cctx, void* dstBuffer, size_t dstMaxSize, const LZ4F_compressOptions_t* cOptPtr);
/* LZ4F_flush()
* Should you need to generate compressed data immediately, without waiting for the current block to be filled,
* you can call LZ4_flush(), which will immediately compress any remaining data buffered within cctx.
* Note that dstMaxSize must be large enough to ensure the operation will be successful.
* LZ4F_compressOptions_t structure is optional : you can provide NULL as argument.
* The result of the function is the number of bytes written into dstBuffer
* (it can be zero, this means there was no data left within cctx)
* The function outputs an error code if it fails (can be tested using LZ4F_isError())
*/
size_t LZ4F_compressEnd(LZ4F_compressionContext_t cctx, void* dstBuffer, size_t dstMaxSize, const LZ4F_compressOptions_t* cOptPtr);
/* LZ4F_compressEnd()
* When you want to properly finish the compressed frame, just call LZ4F_compressEnd().
* It will flush whatever data remained within compressionContext (like LZ4_flush())
* but also properly finalize the frame, with an endMark and a checksum.
* The result of the function is the number of bytes written into dstBuffer (necessarily >= 4 (endMark), or 8 if optional frame checksum is enabled)
* The function outputs an error code if it fails (can be tested using LZ4F_isError())
* The LZ4F_compressOptions_t structure is optional : you can provide NULL as argument.
* A successful call to LZ4F_compressEnd() makes cctx available again for next compression task.
*/
/***********************************
* Decompression functions
***********************************/
typedef struct LZ4F_dctx_s* LZ4F_decompressionContext_t; /* must be aligned on 8-bytes */
typedef struct {
unsigned stableDst; /* guarantee that decompressed data will still be there on next function calls (avoid storage into tmp buffers) */
unsigned reserved[3];
} LZ4F_decompressOptions_t;
/* Resource management */
LZ4F_errorCode_t LZ4F_createDecompressionContext(LZ4F_decompressionContext_t* dctxPtr, unsigned version);
LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_decompressionContext_t dctx);
/* LZ4F_createDecompressionContext() :
* The first thing to do is to create an LZ4F_decompressionContext_t object, which will be used in all decompression operations.
* This is achieved using LZ4F_createDecompressionContext().
* The version provided MUST be LZ4F_VERSION. It is intended to track potential breaking differences between different versions.
* The function will provide a pointer to a fully allocated and initialized LZ4F_decompressionContext_t object.
* The result is an errorCode, which can be tested using LZ4F_isError().
* dctx memory can be released using LZ4F_freeDecompressionContext();
* The result of LZ4F_freeDecompressionContext() is indicative of the current state of decompressionContext when being released.
* That is, it should be == 0 if decompression has been completed fully and correctly.
*/
/* Decompression */
size_t LZ4F_getFrameInfo(LZ4F_decompressionContext_t dctx,
LZ4F_frameInfo_t* frameInfoPtr,
const void* srcBuffer, size_t* srcSizePtr);
/* LZ4F_getFrameInfo()
* This function decodes frame header information (such as max blockSize, frame checksum, etc.).
* Its usage is optional : you can start by calling directly LZ4F_decompress() instead.
* The objective is to extract frame header information, typically for allocation purposes.
* LZ4F_getFrameInfo() can also be used anytime *after* starting decompression, on any valid LZ4F_decompressionContext_t.
* The result is *copied* into an existing LZ4F_frameInfo_t structure which must be already allocated.
* The number of bytes read from srcBuffer will be provided within *srcSizePtr (necessarily <= original value).
* The function result is an hint of how many srcSize bytes LZ4F_decompress() expects for next call,
* or an error code which can be tested using LZ4F_isError()
* (typically, when there is not enough src bytes to fully decode the frame header)
* You are expected to resume decompression from where it stopped (srcBuffer + *srcSizePtr)
*/
size_t LZ4F_decompress(LZ4F_decompressionContext_t dctx,
void* dstBuffer, size_t* dstSizePtr,
const void* srcBuffer, size_t* srcSizePtr,
const LZ4F_decompressOptions_t* dOptPtr);
/* LZ4F_decompress()
* Call this function repetitively to regenerate data compressed within srcBuffer.
* The function will attempt to decode *srcSizePtr bytes from srcBuffer, into dstBuffer of maximum size *dstSizePtr.
*
* The number of bytes regenerated into dstBuffer will be provided within *dstSizePtr (necessarily <= original value).
*
* The number of bytes read from srcBuffer will be provided within *srcSizePtr (necessarily <= original value).
* If number of bytes read is < number of bytes provided, then decompression operation is not completed.
* It typically happens when dstBuffer is not large enough to contain all decoded data.
* LZ4F_decompress() must be called again, starting from where it stopped (srcBuffer + *srcSizePtr)
* The function will check this condition, and refuse to continue if it is not respected.
*
* dstBuffer is supposed to be flushed between each call to the function, since its content will be overwritten.
* dst arguments can be changed at will with each consecutive call to the function.
*
* The function result is an hint of how many srcSize bytes LZ4F_decompress() expects for next call.
* Schematically, it's the size of the current (or remaining) compressed block + header of next block.
* Respecting the hint provides some boost to performance, since it does skip intermediate buffers.
* This is just a hint, you can always provide any srcSize you want.
* When a frame is fully decoded, the function result will be 0 (no more data expected).
* If decompression failed, function result is an error code, which can be tested using LZ4F_isError().
*
* After a frame is fully decoded, dctx can be used again to decompress another frame.
*/
#if defined (__cplusplus)
}
#endif

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/*
LZ4 auto-framing library
Header File for static linking only
Copyright (C) 2011-2015, 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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/* lz4frame_static.h should be used solely in the context of static linking.
* It contains definitions which may still change overtime.
* Never use it in the context of DLL linking.
* */
/**************************************
* Includes
**************************************/
#include "lz4frame.h"
/**************************************
* Error management
* ************************************/
#define LZ4F_LIST_ERRORS(ITEM) \
ITEM(OK_NoError) ITEM(ERROR_GENERIC) \
ITEM(ERROR_maxBlockSize_invalid) ITEM(ERROR_blockMode_invalid) ITEM(ERROR_contentChecksumFlag_invalid) \
ITEM(ERROR_compressionLevel_invalid) \
ITEM(ERROR_headerVersion_wrong) ITEM(ERROR_blockChecksum_unsupported) 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_maxCode)
//#define LZ4F_DISABLE_OLD_ENUMS
#ifndef LZ4F_DISABLE_OLD_ENUMS
#define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM, ENUM = LZ4F_##ENUM,
#else
#define LZ4F_GENERATE_ENUM(ENUM) LZ4F_##ENUM,
#endif
typedef enum { LZ4F_LIST_ERRORS(LZ4F_GENERATE_ENUM) } LZ4F_errorCodes; /* enum is exposed, to handle specific errors; compare function result to -enum value */
#if defined (__cplusplus)
}
#endif

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/*
LZ4 HC - High Compression Mode of LZ4
Copyright (C) 2011-2015, 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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/**************************************
* Tuning Parameter
**************************************/
static const int LZ4HC_compressionLevel_default = 9;
/**************************************
* Includes
**************************************/
#include "lz4hc.h"
/**************************************
* Local Compiler Options
**************************************/
#if defined(__GNUC__)
# pragma GCC diagnostic ignored "-Wunused-function"
#endif
#if defined (__clang__)
# pragma clang diagnostic ignored "-Wunused-function"
#endif
/**************************************
* Common LZ4 definition
**************************************/
#define LZ4_COMMONDEFS_ONLY
#include "lz4.c"
/**************************************
* Local Constants
**************************************/
#define DICTIONARY_LOGSIZE 16
#define MAXD (1<<DICTIONARY_LOGSIZE)
#define MAXD_MASK (MAXD - 1)
#define HASH_LOG (DICTIONARY_LOGSIZE-1)
#define HASHTABLESIZE (1 << HASH_LOG)
#define HASH_MASK (HASHTABLESIZE - 1)
#define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH)
static const int g_maxCompressionLevel = 16;
/**************************************
* Local Types
**************************************/
typedef struct
{
U32 hashTable[HASHTABLESIZE];
U16 chainTable[MAXD];
const BYTE* end; /* next block here to continue on current prefix */
const BYTE* base; /* All index relative to this position */
const BYTE* dictBase; /* alternate base for extDict */
BYTE* inputBuffer; /* deprecated */
U32 dictLimit; /* below that point, need extDict */
U32 lowLimit; /* below that point, no more dict */
U32 nextToUpdate; /* index from which to continue dictionary update */
U32 compressionLevel;
} LZ4HC_Data_Structure;
/**************************************
* Local Macros
**************************************/
#define HASH_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
//#define DELTANEXTU16(p) chainTable[(p) & MAXD_MASK] /* flexible, MAXD dependent */
#define DELTANEXTU16(p) chainTable[(U16)(p)] /* faster */
static U32 LZ4HC_hashPtr(const void* ptr) { return HASH_FUNCTION(LZ4_read32(ptr)); }
/**************************************
* HC Compression
**************************************/
static void LZ4HC_init (LZ4HC_Data_Structure* hc4, const BYTE* start)
{
MEM_INIT((void*)hc4->hashTable, 0, sizeof(hc4->hashTable));
MEM_INIT(hc4->chainTable, 0xFF, sizeof(hc4->chainTable));
hc4->nextToUpdate = 64 KB;
hc4->base = start - 64 KB;
hc4->end = start;
hc4->dictBase = start - 64 KB;
hc4->dictLimit = 64 KB;
hc4->lowLimit = 64 KB;
}
/* Update chains up to ip (excluded) */
FORCE_INLINE void LZ4HC_Insert (LZ4HC_Data_Structure* hc4, const BYTE* ip)
{
U16* chainTable = hc4->chainTable;
U32* HashTable = hc4->hashTable;
const BYTE* const base = hc4->base;
const U32 target = (U32)(ip - base);
U32 idx = hc4->nextToUpdate;
while(idx < target)
{
U32 h = LZ4HC_hashPtr(base+idx);
size_t delta = idx - HashTable[h];
if (delta>MAX_DISTANCE) delta = MAX_DISTANCE;
DELTANEXTU16(idx) = (U16)delta;
HashTable[h] = idx;
idx++;
}
hc4->nextToUpdate = target;
}
FORCE_INLINE int LZ4HC_InsertAndFindBestMatch (LZ4HC_Data_Structure* hc4, /* Index table will be updated */
const BYTE* ip, const BYTE* const iLimit,
const BYTE** matchpos,
const int maxNbAttempts)
{
U16* const chainTable = hc4->chainTable;
U32* const HashTable = hc4->hashTable;
const BYTE* const base = hc4->base;
const BYTE* const dictBase = hc4->dictBase;
const U32 dictLimit = hc4->dictLimit;
const U32 lowLimit = (hc4->lowLimit + 64 KB > (U32)(ip-base)) ? hc4->lowLimit : (U32)(ip - base) - (64 KB - 1);
U32 matchIndex;
const BYTE* match;
int nbAttempts=maxNbAttempts;
size_t ml=0;
/* HC4 match finder */
LZ4HC_Insert(hc4, ip);
matchIndex = HashTable[LZ4HC_hashPtr(ip)];
while ((matchIndex>=lowLimit) && (nbAttempts))
{
nbAttempts--;
if (matchIndex >= dictLimit)
{
match = base + matchIndex;
if (*(match+ml) == *(ip+ml)
&& (LZ4_read32(match) == LZ4_read32(ip)))
{
size_t mlt = LZ4_count(ip+MINMATCH, match+MINMATCH, iLimit) + MINMATCH;
if (mlt > ml) { ml = mlt; *matchpos = match; }
}
}
else
{
match = dictBase + matchIndex;
if (LZ4_read32(match) == LZ4_read32(ip))
{
size_t mlt;
const BYTE* vLimit = ip + (dictLimit - matchIndex);
if (vLimit > iLimit) vLimit = iLimit;
mlt = LZ4_count(ip+MINMATCH, match+MINMATCH, vLimit) + MINMATCH;
if ((ip+mlt == vLimit) && (vLimit < iLimit))
mlt += LZ4_count(ip+mlt, base+dictLimit, iLimit);
if (mlt > ml) { ml = mlt; *matchpos = base + matchIndex; } /* virtual matchpos */
}
}
matchIndex -= DELTANEXTU16(matchIndex);
}
return (int)ml;
}
FORCE_INLINE int LZ4HC_InsertAndGetWiderMatch (
LZ4HC_Data_Structure* hc4,
const BYTE* const ip,
const BYTE* const iLowLimit,
const BYTE* const iHighLimit,
int longest,
const BYTE** matchpos,
const BYTE** startpos,
const int maxNbAttempts)
{
U16* const chainTable = hc4->chainTable;
U32* const HashTable = hc4->hashTable;
const BYTE* const base = hc4->base;
const U32 dictLimit = hc4->dictLimit;
const BYTE* const lowPrefixPtr = base + dictLimit;
const U32 lowLimit = (hc4->lowLimit + 64 KB > (U32)(ip-base)) ? hc4->lowLimit : (U32)(ip - base) - (64 KB - 1);
const BYTE* const dictBase = hc4->dictBase;
U32 matchIndex;
int nbAttempts = maxNbAttempts;
int delta = (int)(ip-iLowLimit);
/* First Match */
LZ4HC_Insert(hc4, ip);
matchIndex = HashTable[LZ4HC_hashPtr(ip)];
while ((matchIndex>=lowLimit) && (nbAttempts))
{
nbAttempts--;
if (matchIndex >= dictLimit)
{
const BYTE* matchPtr = base + matchIndex;
if (*(iLowLimit + longest) == *(matchPtr - delta + longest))
if (LZ4_read32(matchPtr) == LZ4_read32(ip))
{
int mlt = MINMATCH + LZ4_count(ip+MINMATCH, matchPtr+MINMATCH, iHighLimit);
int back = 0;
while ((ip+back>iLowLimit)
&& (matchPtr+back > lowPrefixPtr)
&& (ip[back-1] == matchPtr[back-1]))
back--;
mlt -= back;
if (mlt > longest)
{
longest = (int)mlt;
*matchpos = matchPtr+back;
*startpos = ip+back;
}
}
}
else
{
const BYTE* matchPtr = dictBase + matchIndex;
if (LZ4_read32(matchPtr) == LZ4_read32(ip))
{
size_t mlt;
int back=0;
const BYTE* vLimit = ip + (dictLimit - matchIndex);
if (vLimit > iHighLimit) vLimit = iHighLimit;
mlt = LZ4_count(ip+MINMATCH, matchPtr+MINMATCH, vLimit) + MINMATCH;
if ((ip+mlt == vLimit) && (vLimit < iHighLimit))
mlt += LZ4_count(ip+mlt, base+dictLimit, iHighLimit);
while ((ip+back > iLowLimit) && (matchIndex+back > lowLimit) && (ip[back-1] == matchPtr[back-1])) back--;
mlt -= back;
if ((int)mlt > longest) { longest = (int)mlt; *matchpos = base + matchIndex + back; *startpos = ip+back; }
}
}
matchIndex -= DELTANEXTU16(matchIndex);
}
return longest;
}
typedef enum { noLimit = 0, limitedOutput = 1 } limitedOutput_directive;
#define LZ4HC_DEBUG 0
#if LZ4HC_DEBUG
static unsigned debug = 0;
#endif
FORCE_INLINE int LZ4HC_encodeSequence (
const BYTE** ip,
BYTE** op,
const BYTE** anchor,
int matchLength,
const BYTE* const match,
limitedOutput_directive limitedOutputBuffer,
BYTE* oend)
{
int length;
BYTE* token;
#if LZ4HC_DEBUG
if (debug) printf("literal : %u -- match : %u -- offset : %u\n", (U32)(*ip - *anchor), (U32)matchLength, (U32)(*ip-match));
#endif
/* Encode Literal length */
length = (int)(*ip - *anchor);
token = (*op)++;
if ((limitedOutputBuffer) && ((*op + (length>>8) + length + (2 + 1 + LASTLITERALS)) > oend)) return 1; /* Check output limit */
if (length>=(int)RUN_MASK) { int len; *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *(*op)++ = 255; *(*op)++ = (BYTE)len; }
else *token = (BYTE)(length<<ML_BITS);
/* Copy Literals */
LZ4_wildCopy(*op, *anchor, (*op) + length);
*op += length;
/* Encode Offset */
LZ4_writeLE16(*op, (U16)(*ip-match)); *op += 2;
/* Encode MatchLength */
length = (int)(matchLength-MINMATCH);
if ((limitedOutputBuffer) && (*op + (length>>8) + (1 + LASTLITERALS) > oend)) return 1; /* Check output limit */
if (length>=(int)ML_MASK) { *token+=ML_MASK; length-=ML_MASK; for(; length > 509 ; length-=510) { *(*op)++ = 255; *(*op)++ = 255; } if (length > 254) { length-=255; *(*op)++ = 255; } *(*op)++ = (BYTE)length; }
else *token += (BYTE)(length);
/* Prepare next loop */
*ip += matchLength;
*anchor = *ip;
return 0;
}
static int LZ4HC_compress_generic (
void* ctxvoid,
const char* source,
char* dest,
int inputSize,
int maxOutputSize,
int compressionLevel,
limitedOutput_directive limit
)
{
LZ4HC_Data_Structure* ctx = (LZ4HC_Data_Structure*) ctxvoid;
const BYTE* ip = (const BYTE*) source;
const BYTE* anchor = ip;
const BYTE* const iend = ip + inputSize;
const BYTE* const mflimit = iend - MFLIMIT;
const BYTE* const matchlimit = (iend - LASTLITERALS);
BYTE* op = (BYTE*) dest;
BYTE* const oend = op + maxOutputSize;
unsigned maxNbAttempts;
int ml, ml2, ml3, ml0;
const BYTE* ref=NULL;
const BYTE* start2=NULL;
const BYTE* ref2=NULL;
const BYTE* start3=NULL;
const BYTE* ref3=NULL;
const BYTE* start0;
const BYTE* ref0;
/* init */
if (compressionLevel > g_maxCompressionLevel) compressionLevel = g_maxCompressionLevel;
if (compressionLevel < 1) compressionLevel = LZ4HC_compressionLevel_default;
maxNbAttempts = 1 << (compressionLevel-1);
ctx->end += inputSize;
ip++;
/* Main Loop */
while (ip < mflimit)
{
ml = LZ4HC_InsertAndFindBestMatch (ctx, ip, matchlimit, (&ref), maxNbAttempts);
if (!ml) { ip++; continue; }
/* saved, in case we would skip too much */
start0 = ip;
ref0 = ref;
ml0 = ml;
_Search2:
if (ip+ml < mflimit)
ml2 = LZ4HC_InsertAndGetWiderMatch(ctx, ip + ml - 2, ip + 1, matchlimit, ml, &ref2, &start2, maxNbAttempts);
else ml2 = ml;
if (ml2 == ml) /* No better match */
{
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
continue;
}
if (start0 < ip)
{
if (start2 < ip + ml0) /* empirical */
{
ip = start0;
ref = ref0;
ml = ml0;
}
}
/* Here, start0==ip */
if ((start2 - ip) < 3) /* First Match too small : removed */
{
ml = ml2;
ip = start2;
ref =ref2;
goto _Search2;
}
_Search3:
/*
* Currently we have :
* ml2 > ml1, and
* ip1+3 <= ip2 (usually < ip1+ml1)
*/
if ((start2 - ip) < OPTIMAL_ML)
{
int correction;
int new_ml = ml;
if (new_ml > OPTIMAL_ML) new_ml = OPTIMAL_ML;
if (ip+new_ml > start2 + ml2 - MINMATCH) new_ml = (int)(start2 - ip) + ml2 - MINMATCH;
correction = new_ml - (int)(start2 - ip);
if (correction > 0)
{
start2 += correction;
ref2 += correction;
ml2 -= correction;
}
}
/* Now, we have start2 = ip+new_ml, with new_ml = min(ml, OPTIMAL_ML=18) */
if (start2 + ml2 < mflimit)
ml3 = LZ4HC_InsertAndGetWiderMatch(ctx, start2 + ml2 - 3, start2, matchlimit, ml2, &ref3, &start3, maxNbAttempts);
else ml3 = ml2;
if (ml3 == ml2) /* No better match : 2 sequences to encode */
{
/* ip & ref are known; Now for ml */
if (start2 < ip+ml) ml = (int)(start2 - ip);
/* Now, encode 2 sequences */
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
ip = start2;
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml2, ref2, limit, oend)) return 0;
continue;
}
if (start3 < ip+ml+3) /* Not enough space for match 2 : remove it */
{
if (start3 >= (ip+ml)) /* can write Seq1 immediately ==> Seq2 is removed, so Seq3 becomes Seq1 */
{
if (start2 < ip+ml)
{
int correction = (int)(ip+ml - start2);
start2 += correction;
ref2 += correction;
ml2 -= correction;
if (ml2 < MINMATCH)
{
start2 = start3;
ref2 = ref3;
ml2 = ml3;
}
}
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
ip = start3;
ref = ref3;
ml = ml3;
start0 = start2;
ref0 = ref2;
ml0 = ml2;
goto _Search2;
}
start2 = start3;
ref2 = ref3;
ml2 = ml3;
goto _Search3;
}
/*
* OK, now we have 3 ascending matches; let's write at least the first one
* ip & ref are known; Now for ml
*/
if (start2 < ip+ml)
{
if ((start2 - ip) < (int)ML_MASK)
{
int correction;
if (ml > OPTIMAL_ML) ml = OPTIMAL_ML;
if (ip + ml > start2 + ml2 - MINMATCH) ml = (int)(start2 - ip) + ml2 - MINMATCH;
correction = ml - (int)(start2 - ip);
if (correction > 0)
{
start2 += correction;
ref2 += correction;
ml2 -= correction;
}
}
else
{
ml = (int)(start2 - ip);
}
}
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
ip = start2;
ref = ref2;
ml = ml2;
start2 = start3;
ref2 = ref3;
ml2 = ml3;
goto _Search3;
}
/* Encode Last Literals */
{
int lastRun = (int)(iend - anchor);
if ((limit) && (((char*)op - dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize)) return 0; /* Check output limit */
if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
else *op++ = (BYTE)(lastRun<<ML_BITS);
memcpy(op, anchor, iend - anchor);
op += iend-anchor;
}
/* End */
return (int) (((char*)op)-dest);
}
int LZ4_sizeofStateHC(void) { return sizeof(LZ4HC_Data_Structure); }
int LZ4_compress_HC_extStateHC (void* state, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel)
{
if (((size_t)(state)&(sizeof(void*)-1)) != 0) return 0; /* Error : state is not aligned for pointers (32 or 64 bits) */
LZ4HC_init ((LZ4HC_Data_Structure*)state, (const BYTE*)src);
if (maxDstSize < LZ4_compressBound(srcSize))
return LZ4HC_compress_generic (state, src, dst, srcSize, maxDstSize, compressionLevel, limitedOutput);
else
return LZ4HC_compress_generic (state, src, dst, srcSize, maxDstSize, compressionLevel, noLimit);
}
int LZ4_compress_HC(const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel)
{
LZ4HC_Data_Structure state;
return LZ4_compress_HC_extStateHC(&state, src, dst, srcSize, maxDstSize, compressionLevel);
}
/**************************************
* Streaming Functions
**************************************/
/* allocation */
LZ4_streamHC_t* LZ4_createStreamHC(void) { return (LZ4_streamHC_t*)malloc(sizeof(LZ4_streamHC_t)); }
int LZ4_freeStreamHC (LZ4_streamHC_t* LZ4_streamHCPtr) { free(LZ4_streamHCPtr); return 0; }
/* initialization */
void LZ4_resetStreamHC (LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel)
{
LZ4_STATIC_ASSERT(sizeof(LZ4HC_Data_Structure) <= sizeof(LZ4_streamHC_t)); /* if compilation fails here, LZ4_STREAMHCSIZE must be increased */
((LZ4HC_Data_Structure*)LZ4_streamHCPtr)->base = NULL;
((LZ4HC_Data_Structure*)LZ4_streamHCPtr)->compressionLevel = (unsigned)compressionLevel;
}
int LZ4_loadDictHC (LZ4_streamHC_t* LZ4_streamHCPtr, const char* dictionary, int dictSize)
{
LZ4HC_Data_Structure* ctxPtr = (LZ4HC_Data_Structure*) LZ4_streamHCPtr;
if (dictSize > 64 KB)
{
dictionary += dictSize - 64 KB;
dictSize = 64 KB;
}
LZ4HC_init (ctxPtr, (const BYTE*)dictionary);
if (dictSize >= 4) LZ4HC_Insert (ctxPtr, (const BYTE*)dictionary +(dictSize-3));
ctxPtr->end = (const BYTE*)dictionary + dictSize;
return dictSize;
}
/* compression */
static void LZ4HC_setExternalDict(LZ4HC_Data_Structure* ctxPtr, const BYTE* newBlock)
{
if (ctxPtr->end >= ctxPtr->base + 4)
LZ4HC_Insert (ctxPtr, ctxPtr->end-3); /* Referencing remaining dictionary content */
/* Only one memory segment for extDict, so any previous extDict is lost at this stage */
ctxPtr->lowLimit = ctxPtr->dictLimit;
ctxPtr->dictLimit = (U32)(ctxPtr->end - ctxPtr->base);
ctxPtr->dictBase = ctxPtr->base;
ctxPtr->base = newBlock - ctxPtr->dictLimit;
ctxPtr->end = newBlock;
ctxPtr->nextToUpdate = ctxPtr->dictLimit; /* match referencing will resume from there */
}
static int LZ4_compressHC_continue_generic (LZ4HC_Data_Structure* ctxPtr,
const char* source, char* dest,
int inputSize, int maxOutputSize, limitedOutput_directive limit)
{
/* auto-init if forgotten */
if (ctxPtr->base == NULL)
LZ4HC_init (ctxPtr, (const BYTE*) source);
/* Check overflow */
if ((size_t)(ctxPtr->end - ctxPtr->base) > 2 GB)
{
size_t dictSize = (size_t)(ctxPtr->end - ctxPtr->base) - ctxPtr->dictLimit;
if (dictSize > 64 KB) dictSize = 64 KB;
LZ4_loadDictHC((LZ4_streamHC_t*)ctxPtr, (const char*)(ctxPtr->end) - dictSize, (int)dictSize);
}
/* Check if blocks follow each other */
if ((const BYTE*)source != ctxPtr->end)
LZ4HC_setExternalDict(ctxPtr, (const BYTE*)source);
/* Check overlapping input/dictionary space */
{
const BYTE* sourceEnd = (const BYTE*) source + inputSize;
const BYTE* dictBegin = ctxPtr->dictBase + ctxPtr->lowLimit;
const BYTE* dictEnd = ctxPtr->dictBase + ctxPtr->dictLimit;
if ((sourceEnd > dictBegin) && ((const BYTE*)source < dictEnd))
{
if (sourceEnd > dictEnd) sourceEnd = dictEnd;
ctxPtr->lowLimit = (U32)(sourceEnd - ctxPtr->dictBase);
if (ctxPtr->dictLimit - ctxPtr->lowLimit < 4) ctxPtr->lowLimit = ctxPtr->dictLimit;
}
}
return LZ4HC_compress_generic (ctxPtr, source, dest, inputSize, maxOutputSize, ctxPtr->compressionLevel, limit);
}
int LZ4_compress_HC_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize, int maxOutputSize)
{
if (maxOutputSize < LZ4_compressBound(inputSize))
return LZ4_compressHC_continue_generic ((LZ4HC_Data_Structure*)LZ4_streamHCPtr, source, dest, inputSize, maxOutputSize, limitedOutput);
else
return LZ4_compressHC_continue_generic ((LZ4HC_Data_Structure*)LZ4_streamHCPtr, source, dest, inputSize, maxOutputSize, noLimit);
}
/* dictionary saving */
int LZ4_saveDictHC (LZ4_streamHC_t* LZ4_streamHCPtr, char* safeBuffer, int dictSize)
{
LZ4HC_Data_Structure* streamPtr = (LZ4HC_Data_Structure*)LZ4_streamHCPtr;
int prefixSize = (int)(streamPtr->end - (streamPtr->base + streamPtr->dictLimit));
if (dictSize > 64 KB) dictSize = 64 KB;
if (dictSize < 4) dictSize = 0;
if (dictSize > prefixSize) dictSize = prefixSize;
memmove(safeBuffer, streamPtr->end - dictSize, dictSize);
{
U32 endIndex = (U32)(streamPtr->end - streamPtr->base);
streamPtr->end = (const BYTE*)safeBuffer + dictSize;
streamPtr->base = streamPtr->end - endIndex;
streamPtr->dictLimit = endIndex - dictSize;
streamPtr->lowLimit = endIndex - dictSize;
if (streamPtr->nextToUpdate < streamPtr->dictLimit) streamPtr->nextToUpdate = streamPtr->dictLimit;
}
return dictSize;
}
/***********************************
* Deprecated Functions
***********************************/
/* Deprecated compression functions */
/* These functions are planned to start generate warnings by r131 approximately */
int LZ4_compressHC(const char* src, char* dst, int srcSize) { return LZ4_compress_HC (src, dst, srcSize, LZ4_compressBound(srcSize), 0); }
int LZ4_compressHC_limitedOutput(const char* src, char* dst, int srcSize, int maxDstSize) { return LZ4_compress_HC(src, dst, srcSize, maxDstSize, 0); }
int LZ4_compressHC2(const char* src, char* dst, int srcSize, int cLevel) { return LZ4_compress_HC (src, dst, srcSize, LZ4_compressBound(srcSize), cLevel); }
int LZ4_compressHC2_limitedOutput(const char* src, char* dst, int srcSize, int maxDstSize, int cLevel) { return LZ4_compress_HC(src, dst, srcSize, maxDstSize, cLevel); }
int LZ4_compressHC_withStateHC (void* state, const char* src, char* dst, int srcSize) { return LZ4_compress_HC_extStateHC (state, src, dst, srcSize, LZ4_compressBound(srcSize), 0); }
int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* src, char* dst, int srcSize, int maxDstSize) { return LZ4_compress_HC_extStateHC (state, src, dst, srcSize, maxDstSize, 0); }
int LZ4_compressHC2_withStateHC (void* state, const char* src, char* dst, int srcSize, int cLevel) { return LZ4_compress_HC_extStateHC(state, src, dst, srcSize, LZ4_compressBound(srcSize), cLevel); }
int LZ4_compressHC2_limitedOutput_withStateHC (void* state, const char* src, char* dst, int srcSize, int maxDstSize, int cLevel) { return LZ4_compress_HC_extStateHC(state, src, dst, srcSize, maxDstSize, cLevel); }
int LZ4_compressHC_continue (LZ4_streamHC_t* ctx, const char* src, char* dst, int srcSize) { return LZ4_compress_HC_continue (ctx, src, dst, srcSize, LZ4_compressBound(srcSize)); }
int LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t* ctx, const char* src, char* dst, int srcSize, int maxDstSize) { return LZ4_compress_HC_continue (ctx, src, dst, srcSize, maxDstSize); }
/* Deprecated streaming functions */
/* These functions currently generate deprecation warnings */
int LZ4_sizeofStreamStateHC(void) { return LZ4_STREAMHCSIZE; }
int LZ4_resetStreamStateHC(void* state, char* inputBuffer)
{
if ((((size_t)state) & (sizeof(void*)-1)) != 0) return 1; /* Error : pointer is not aligned for pointer (32 or 64 bits) */
LZ4HC_init((LZ4HC_Data_Structure*)state, (const BYTE*)inputBuffer);
((LZ4HC_Data_Structure*)state)->inputBuffer = (BYTE*)inputBuffer;
return 0;
}
void* LZ4_createHC (char* inputBuffer)
{
void* hc4 = ALLOCATOR(1, sizeof(LZ4HC_Data_Structure));
if (hc4 == NULL) return NULL; /* not enough memory */
LZ4HC_init ((LZ4HC_Data_Structure*)hc4, (const BYTE*)inputBuffer);
((LZ4HC_Data_Structure*)hc4)->inputBuffer = (BYTE*)inputBuffer;
return hc4;
}
int LZ4_freeHC (void* LZ4HC_Data)
{
FREEMEM(LZ4HC_Data);
return (0);
}
int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel)
{
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, 0, compressionLevel, noLimit);
}
int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
{
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
}
char* LZ4_slideInputBufferHC(void* LZ4HC_Data)
{
LZ4HC_Data_Structure* hc4 = (LZ4HC_Data_Structure*)LZ4HC_Data;
int dictSize = LZ4_saveDictHC((LZ4_streamHC_t*)LZ4HC_Data, (char*)(hc4->inputBuffer), 64 KB);
return (char*)(hc4->inputBuffer + dictSize);
}

189
lz4/lz4hc.h Normal file
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/*
LZ4 HC - High Compression Mode of LZ4
Header File
Copyright (C) 2011-2015, 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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/*****************************
* Includes
*****************************/
#include <stddef.h> /* size_t */
/**************************************
* Block Compression
**************************************/
int LZ4_compress_HC (const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
/*
LZ4_compress_HC :
Destination buffer 'dst' must be already allocated.
Compression completion is guaranteed if 'dst' buffer is sized to handle worst circumstances (data not compressible)
Worst size evaluation is provided by function LZ4_compressBound() (see "lz4.h")
srcSize : Max supported value is LZ4_MAX_INPUT_SIZE (see "lz4.h")
compressionLevel : Recommended values are between 4 and 9, although any value between 0 and 16 will work.
0 means "use default value" (see lz4hc.c).
Values >16 behave the same as 16.
return : the number of bytes written into buffer 'dst'
or 0 if compression fails.
*/
/* Note :
Decompression functions are provided within LZ4 source code (see "lz4.h") (BSD license)
*/
int LZ4_sizeofStateHC(void);
int LZ4_compress_HC_extStateHC(void* state, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
/*
LZ4_compress_HC_extStateHC() :
Use this function if you prefer to manually allocate memory for compression tables.
To know how much memory must be allocated for the compression tables, use :
int LZ4_sizeofStateHC();
Allocated memory must be aligned on 8-bytes boundaries (which a normal malloc() will do properly).
The allocated memory can then be provided to the compression functions using 'void* state' parameter.
LZ4_compress_HC_extStateHC() is equivalent to previously described function.
It just uses externally allocated memory for stateHC.
*/
/**************************************
* Streaming Compression
**************************************/
#define LZ4_STREAMHCSIZE 262192
#define LZ4_STREAMHCSIZE_SIZET (LZ4_STREAMHCSIZE / sizeof(size_t))
typedef struct { size_t table[LZ4_STREAMHCSIZE_SIZET]; } LZ4_streamHC_t;
/*
LZ4_streamHC_t
This structure allows static allocation of LZ4 HC streaming state.
State must then be initialized using LZ4_resetStreamHC() before first use.
Static allocation should only be used in combination with static linking.
If you want to use LZ4 as a DLL, please use construction functions below, which are future-proof.
*/
LZ4_streamHC_t* LZ4_createStreamHC(void);
int LZ4_freeStreamHC (LZ4_streamHC_t* streamHCPtr);
/*
These functions create and release memory for LZ4 HC streaming state.
Newly created states are already initialized.
Existing state space can be re-used anytime using LZ4_resetStreamHC().
If you use LZ4 as a DLL, use these functions instead of static structure allocation,
to avoid size mismatch between different versions.
*/
void LZ4_resetStreamHC (LZ4_streamHC_t* streamHCPtr, int compressionLevel);
int LZ4_loadDictHC (LZ4_streamHC_t* streamHCPtr, const char* dictionary, int dictSize);
int LZ4_compress_HC_continue (LZ4_streamHC_t* streamHCPtr, const char* src, char* dst, int srcSize, int maxDstSize);
int LZ4_saveDictHC (LZ4_streamHC_t* streamHCPtr, char* safeBuffer, int maxDictSize);
/*
These functions compress data in successive blocks of any size, using previous blocks as dictionary.
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 64 KB.
Such case is automatically detected and correctly handled by LZ4_compress_HC_continue().
Before starting compression, state must be properly initialized, using LZ4_resetStreamHC().
A first "fictional block" can then be designated as initial dictionary, using LZ4_loadDictHC() (Optional).
Then, use LZ4_compress_HC_continue() to compress each successive block.
It works like LZ4_compress_HC(), but use previous memory blocks as dictionary to improve compression.
Previous memory blocks (including initial dictionary when present) must remain accessible and unmodified during compression.
As a reminder, size 'dst' buffer to handle worst cases, using LZ4_compressBound(), to ensure success of compression operation.
If, for any reason, previous data blocks can't be preserved unmodified in memory during next compression block,
you must save it to a safer memory space, using LZ4_saveDictHC().
Return value of LZ4_saveDictHC() is the size of dictionary effectively saved into 'safeBuffer'.
*/
/**************************************
* Deprecated Functions
**************************************/
/* Deprecate Warnings */
/* Should these warnings messages be a problem,
it is generally possible to disable them,
with -Wno-deprecated-declarations for gcc
or _CRT_SECURE_NO_WARNINGS in Visual for example.
You can also define LZ4_DEPRECATE_WARNING_DEFBLOCK. */
#ifndef LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_DEPRECATE_WARNING_DEFBLOCK
# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
# if (LZ4_GCC_VERSION >= 405) || defined(__clang__)
# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
# elif (LZ4_GCC_VERSION >= 301)
# define LZ4_DEPRECATED(message) __attribute__((deprecated))
# elif defined(_MSC_VER)
# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
# else
# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
# define LZ4_DEPRECATED(message)
# endif
#endif // LZ4_DEPRECATE_WARNING_DEFBLOCK
/* compression functions */
/* these functions are planned to trigger warning messages by r131 approximately */
int LZ4_compressHC (const char* source, char* dest, int inputSize);
int LZ4_compressHC_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
int LZ4_compressHC2 (const char* source, char* dest, int inputSize, int compressionLevel);
int LZ4_compressHC2_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
int LZ4_compressHC_withStateHC (void* state, const char* source, char* dest, int inputSize);
int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
int LZ4_compressHC2_limitedOutput_withStateHC(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
int LZ4_compressHC_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize);
int LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
/* Streaming functions following the older model; should no longer be used */
LZ4_DEPRECATED("use LZ4_createStreamHC() instead") void* LZ4_createHC (char* inputBuffer);
LZ4_DEPRECATED("use LZ4_saveDictHC() instead") char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
LZ4_DEPRECATED("use LZ4_freeStreamHC() instead") int LZ4_freeHC (void* LZ4HC_Data);
LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") 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") int LZ4_sizeofStreamStateHC(void);
LZ4_DEPRECATED("use LZ4_resetStreamHC() instead") int LZ4_resetStreamStateHC(void* state, char* inputBuffer);
#if defined (__cplusplus)
}
#endif

915
lz4/xxhash.c Normal file
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@ -0,0 +1,915 @@
/*
xxHash - Fast Hash algorithm
Copyright (C) 2012-2015, 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
*/
/**************************************
* Tuning parameters
**************************************/
/* Unaligned memory access is automatically enabled for "common" CPU, such as x86.
* For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected.
* If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance.
* You can also enable this parameter if you know your input data will always be aligned (boundaries of 4, for U32).
*/
#if defined(__ARM_FEATURE_UNALIGNED) || defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
# define XXH_USE_UNALIGNED_ACCESS 1
#endif
/* XXH_ACCEPT_NULL_INPUT_POINTER :
* If the input pointer is a null pointer, xxHash default behavior is to trigger a memory access error, since it is a bad pointer.
* When this option is enabled, xxHash output for null input pointers will be the same as a null-length input.
* By default, this option is disabled. To enable it, uncomment below define :
*/
/* #define XXH_ACCEPT_NULL_INPUT_POINTER 1 */
/* XXH_FORCE_NATIVE_FORMAT :
* By default, xxHash library provides endian-independant Hash values, based on little-endian convention.
* Results are therefore identical for little-endian and big-endian CPU.
* This comes at a performance cost for big-endian CPU, since some swapping is required to emulate little-endian format.
* Should endian-independance be of no importance for your application, you may set the #define below to 1.
* It will improve speed for Big-endian CPU.
* This option has no impact on Little_Endian CPU.
*/
#define XXH_FORCE_NATIVE_FORMAT 0
/**************************************
* Compiler Specific Options
***************************************/
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# define FORCE_INLINE static __forceinline
#else
# if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
# ifdef __GNUC__
# define FORCE_INLINE static inline __attribute__((always_inline))
# else
# define FORCE_INLINE static inline
# endif
# else
# define FORCE_INLINE static
# endif /* __STDC_VERSION__ */
#endif
/**************************************
* Includes & Memory related functions
***************************************/
#include "xxhash.h"
/* Modify the local functions below should you wish to use some other memory routines */
/* for malloc(), free() */
#include <stdlib.h>
static void* XXH_malloc(size_t s) { return malloc(s); }
static void XXH_free (void* p) { free(p); }
/* for memcpy() */
#include <string.h>
static void* XXH_memcpy(void* dest, const void* src, size_t size) { return memcpy(dest,src,size); }
/**************************************
* Basic Types
***************************************/
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
# include <stdint.h>
typedef uint8_t BYTE;
typedef uint16_t U16;
typedef uint32_t U32;
typedef int32_t S32;
typedef uint64_t U64;
#else
typedef unsigned char BYTE;
typedef unsigned short U16;
typedef unsigned int U32;
typedef signed int S32;
typedef unsigned long long U64;
#endif
static U32 XXH_read32(const void* memPtr)
{
U32 val32;
memcpy(&val32, memPtr, 4);
return val32;
}
static U64 XXH_read64(const void* memPtr)
{
U64 val64;
memcpy(&val64, memPtr, 8);
return val64;
}
/******************************************
* Compiler-specific Functions and Macros
******************************************/
#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
/* Note : although _rotl exists for minGW (GCC under windows), performance seems poor */
#if defined(_MSC_VER)
# define XXH_rotl32(x,r) _rotl(x,r)
# define XXH_rotl64(x,r) _rotl64(x,r)
#else
# define XXH_rotl32(x,r) ((x << r) | (x >> (32 - r)))
# define XXH_rotl64(x,r) ((x << r) | (x >> (64 - r)))
#endif
#if defined(_MSC_VER) /* Visual Studio */
# define XXH_swap32 _byteswap_ulong
# define XXH_swap64 _byteswap_uint64
#elif GCC_VERSION >= 403
# define XXH_swap32 __builtin_bswap32
# define XXH_swap64 __builtin_bswap64
#else
static U32 XXH_swap32 (U32 x)
{
return ((x << 24) & 0xff000000 ) |
((x << 8) & 0x00ff0000 ) |
((x >> 8) & 0x0000ff00 ) |
((x >> 24) & 0x000000ff );
}
static U64 XXH_swap64 (U64 x)
{
return ((x << 56) & 0xff00000000000000ULL) |
((x << 40) & 0x00ff000000000000ULL) |
((x << 24) & 0x0000ff0000000000ULL) |
((x << 8) & 0x000000ff00000000ULL) |
((x >> 8) & 0x00000000ff000000ULL) |
((x >> 24) & 0x0000000000ff0000ULL) |
((x >> 40) & 0x000000000000ff00ULL) |
((x >> 56) & 0x00000000000000ffULL);
}
#endif
/***************************************
* Architecture Macros
***************************************/
typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;
#ifndef XXH_CPU_LITTLE_ENDIAN /* XXH_CPU_LITTLE_ENDIAN can be defined externally, for example using a compiler switch */
static const int one = 1;
# define XXH_CPU_LITTLE_ENDIAN (*(const char*)(&one))
#endif
/*****************************
* Memory reads
*****************************/
typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment;
FORCE_INLINE U32 XXH_readLE32_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
{
if (align==XXH_unaligned)
return endian==XXH_littleEndian ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr));
else
return endian==XXH_littleEndian ? *(const U32*)ptr : XXH_swap32(*(const U32*)ptr);
}
FORCE_INLINE U32 XXH_readLE32(const void* ptr, XXH_endianess endian)
{
return XXH_readLE32_align(ptr, endian, XXH_unaligned);
}
FORCE_INLINE U64 XXH_readLE64_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
{
if (align==XXH_unaligned)
return endian==XXH_littleEndian ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr));
else
return endian==XXH_littleEndian ? *(const U64*)ptr : XXH_swap64(*(const U64*)ptr);
}
FORCE_INLINE U64 XXH_readLE64(const void* ptr, XXH_endianess endian)
{
return XXH_readLE64_align(ptr, endian, XXH_unaligned);
}
/***************************************
* Macros
***************************************/
#define XXH_STATIC_ASSERT(c) { enum { XXH_static_assert = 1/(!!(c)) }; } /* use only *after* variable declarations */
/***************************************
* Constants
***************************************/
#define PRIME32_1 2654435761U
#define PRIME32_2 2246822519U
#define PRIME32_3 3266489917U
#define PRIME32_4 668265263U
#define PRIME32_5 374761393U
#define PRIME64_1 11400714785074694791ULL
#define PRIME64_2 14029467366897019727ULL
#define PRIME64_3 1609587929392839161ULL
#define PRIME64_4 9650029242287828579ULL
#define PRIME64_5 2870177450012600261ULL
/*****************************
* Simple Hash Functions
*****************************/
FORCE_INLINE U32 XXH32_endian_align(const void* input, size_t len, U32 seed, XXH_endianess endian, XXH_alignment align)
{
const BYTE* p = (const BYTE*)input;
const BYTE* bEnd = p + len;
U32 h32;
#define XXH_get32bits(p) XXH_readLE32_align(p, endian, align)
#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
if (p==NULL)
{
len=0;
bEnd=p=(const BYTE*)(size_t)16;
}
#endif
if (len>=16)
{
const BYTE* const limit = bEnd - 16;
U32 v1 = seed + PRIME32_1 + PRIME32_2;
U32 v2 = seed + PRIME32_2;
U32 v3 = seed + 0;
U32 v4 = seed - PRIME32_1;
do
{
v1 += XXH_get32bits(p) * PRIME32_2;
v1 = XXH_rotl32(v1, 13);
v1 *= PRIME32_1;
p+=4;
v2 += XXH_get32bits(p) * PRIME32_2;
v2 = XXH_rotl32(v2, 13);
v2 *= PRIME32_1;
p+=4;
v3 += XXH_get32bits(p) * PRIME32_2;
v3 = XXH_rotl32(v3, 13);
v3 *= PRIME32_1;
p+=4;
v4 += XXH_get32bits(p) * PRIME32_2;
v4 = XXH_rotl32(v4, 13);
v4 *= PRIME32_1;
p+=4;
}
while (p<=limit);
h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7) + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);
}
else
{
h32 = seed + PRIME32_5;
}
h32 += (U32) len;
while (p+4<=bEnd)
{
h32 += XXH_get32bits(p) * PRIME32_3;
h32 = XXH_rotl32(h32, 17) * PRIME32_4 ;
p+=4;
}
while (p<bEnd)
{
h32 += (*p) * PRIME32_5;
h32 = XXH_rotl32(h32, 11) * PRIME32_1 ;
p++;
}
h32 ^= h32 >> 15;
h32 *= PRIME32_2;
h32 ^= h32 >> 13;
h32 *= PRIME32_3;
h32 ^= h32 >> 16;
return h32;
}
unsigned XXH32 (const void* input, size_t len, unsigned seed)
{
#if 0
/* Simple version, good for code maintenance, but unfortunately slow for small inputs */
XXH32_state_t state;
XXH32_reset(&state, seed);
XXH32_update(&state, input, len);
return XXH32_digest(&state);
#else
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
# if !defined(XXH_USE_UNALIGNED_ACCESS)
if ((((size_t)input) & 3) == 0) /* Input is 4-bytes aligned, leverage the speed benefit */
{
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);
else
return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);
}
# endif
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);
else
return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);
#endif
}
FORCE_INLINE U64 XXH64_endian_align(const void* input, size_t len, U64 seed, XXH_endianess endian, XXH_alignment align)
{
const BYTE* p = (const BYTE*)input;
const BYTE* bEnd = p + len;
U64 h64;
#define XXH_get64bits(p) XXH_readLE64_align(p, endian, align)
#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
if (p==NULL)
{
len=0;
bEnd=p=(const BYTE*)(size_t)32;
}
#endif
if (len>=32)
{
const BYTE* const limit = bEnd - 32;
U64 v1 = seed + PRIME64_1 + PRIME64_2;
U64 v2 = seed + PRIME64_2;
U64 v3 = seed + 0;
U64 v4 = seed - PRIME64_1;
do
{
v1 += XXH_get64bits(p) * PRIME64_2;
p+=8;
v1 = XXH_rotl64(v1, 31);
v1 *= PRIME64_1;
v2 += XXH_get64bits(p) * PRIME64_2;
p+=8;
v2 = XXH_rotl64(v2, 31);
v2 *= PRIME64_1;
v3 += XXH_get64bits(p) * PRIME64_2;
p+=8;
v3 = XXH_rotl64(v3, 31);
v3 *= PRIME64_1;
v4 += XXH_get64bits(p) * PRIME64_2;
p+=8;
v4 = XXH_rotl64(v4, 31);
v4 *= PRIME64_1;
}
while (p<=limit);
h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
v1 *= PRIME64_2;
v1 = XXH_rotl64(v1, 31);
v1 *= PRIME64_1;
h64 ^= v1;
h64 = h64 * PRIME64_1 + PRIME64_4;
v2 *= PRIME64_2;
v2 = XXH_rotl64(v2, 31);
v2 *= PRIME64_1;
h64 ^= v2;
h64 = h64 * PRIME64_1 + PRIME64_4;
v3 *= PRIME64_2;
v3 = XXH_rotl64(v3, 31);
v3 *= PRIME64_1;
h64 ^= v3;
h64 = h64 * PRIME64_1 + PRIME64_4;
v4 *= PRIME64_2;
v4 = XXH_rotl64(v4, 31);
v4 *= PRIME64_1;
h64 ^= v4;
h64 = h64 * PRIME64_1 + PRIME64_4;
}
else
{
h64 = seed + PRIME64_5;
}
h64 += (U64) len;
while (p+8<=bEnd)
{
U64 k1 = XXH_get64bits(p);
k1 *= PRIME64_2;
k1 = XXH_rotl64(k1,31);
k1 *= PRIME64_1;
h64 ^= k1;
h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;
p+=8;
}
if (p+4<=bEnd)
{
h64 ^= (U64)(XXH_get32bits(p)) * PRIME64_1;
h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;
p+=4;
}
while (p<bEnd)
{
h64 ^= (*p) * PRIME64_5;
h64 = XXH_rotl64(h64, 11) * PRIME64_1;
p++;
}
h64 ^= h64 >> 33;
h64 *= PRIME64_2;
h64 ^= h64 >> 29;
h64 *= PRIME64_3;
h64 ^= h64 >> 32;
return h64;
}
unsigned long long XXH64 (const void* input, size_t len, unsigned long long seed)
{
#if 0
/* Simple version, good for code maintenance, but unfortunately slow for small inputs */
XXH64_state_t state;
XXH64_reset(&state, seed);
XXH64_update(&state, input, len);
return XXH64_digest(&state);
#else
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
# if !defined(XXH_USE_UNALIGNED_ACCESS)
if ((((size_t)input) & 7)==0) /* Input is aligned, let's leverage the speed advantage */
{
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);
else
return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);
}
# endif
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);
else
return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);
#endif
}
/****************************************************
* Advanced Hash Functions
****************************************************/
/*** Allocation ***/
typedef struct
{
U64 total_len;
U32 seed;
U32 v1;
U32 v2;
U32 v3;
U32 v4;
U32 mem32[4]; /* defined as U32 for alignment */
U32 memsize;
} XXH_istate32_t;
typedef struct
{
U64 total_len;
U64 seed;
U64 v1;
U64 v2;
U64 v3;
U64 v4;
U64 mem64[4]; /* defined as U64 for alignment */
U32 memsize;
} XXH_istate64_t;
XXH32_state_t* XXH32_createState(void)
{
XXH_STATIC_ASSERT(sizeof(XXH32_state_t) >= sizeof(XXH_istate32_t)); /* A compilation error here means XXH32_state_t is not large enough */
return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));
}
XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr)
{
XXH_free(statePtr);
return XXH_OK;
}
XXH64_state_t* XXH64_createState(void)
{
XXH_STATIC_ASSERT(sizeof(XXH64_state_t) >= sizeof(XXH_istate64_t)); /* A compilation error here means XXH64_state_t is not large enough */
return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));
}
XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr)
{
XXH_free(statePtr);
return XXH_OK;
}
/*** Hash feed ***/
XXH_errorcode XXH32_reset(XXH32_state_t* state_in, U32 seed)
{
XXH_istate32_t* state = (XXH_istate32_t*) state_in;
state->seed = seed;
state->v1 = seed + PRIME32_1 + PRIME32_2;
state->v2 = seed + PRIME32_2;
state->v3 = seed + 0;
state->v4 = seed - PRIME32_1;
state->total_len = 0;
state->memsize = 0;
return XXH_OK;
}
XXH_errorcode XXH64_reset(XXH64_state_t* state_in, unsigned long long seed)
{
XXH_istate64_t* state = (XXH_istate64_t*) state_in;
state->seed = seed;
state->v1 = seed + PRIME64_1 + PRIME64_2;
state->v2 = seed + PRIME64_2;
state->v3 = seed + 0;
state->v4 = seed - PRIME64_1;
state->total_len = 0;
state->memsize = 0;
return XXH_OK;
}
FORCE_INLINE XXH_errorcode XXH32_update_endian (XXH32_state_t* state_in, const void* input, size_t len, XXH_endianess endian)
{
XXH_istate32_t* state = (XXH_istate32_t *) state_in;
const BYTE* p = (const BYTE*)input;
const BYTE* const bEnd = p + len;
#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
if (input==NULL) return XXH_ERROR;
#endif
state->total_len += len;
if (state->memsize + len < 16) /* fill in tmp buffer */
{
XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, len);
state->memsize += (U32)len;
return XXH_OK;
}
if (state->memsize) /* some data left from previous update */
{
XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, 16-state->memsize);
{
const U32* p32 = state->mem32;
state->v1 += XXH_readLE32(p32, endian) * PRIME32_2;
state->v1 = XXH_rotl32(state->v1, 13);
state->v1 *= PRIME32_1;
p32++;
state->v2 += XXH_readLE32(p32, endian) * PRIME32_2;
state->v2 = XXH_rotl32(state->v2, 13);
state->v2 *= PRIME32_1;
p32++;
state->v3 += XXH_readLE32(p32, endian) * PRIME32_2;
state->v3 = XXH_rotl32(state->v3, 13);
state->v3 *= PRIME32_1;
p32++;
state->v4 += XXH_readLE32(p32, endian) * PRIME32_2;
state->v4 = XXH_rotl32(state->v4, 13);
state->v4 *= PRIME32_1;
p32++;
}
p += 16-state->memsize;
state->memsize = 0;
}
if (p <= bEnd-16)
{
const BYTE* const limit = bEnd - 16;
U32 v1 = state->v1;
U32 v2 = state->v2;
U32 v3 = state->v3;
U32 v4 = state->v4;
do
{
v1 += XXH_readLE32(p, endian) * PRIME32_2;
v1 = XXH_rotl32(v1, 13);
v1 *= PRIME32_1;
p+=4;
v2 += XXH_readLE32(p, endian) * PRIME32_2;
v2 = XXH_rotl32(v2, 13);
v2 *= PRIME32_1;
p+=4;
v3 += XXH_readLE32(p, endian) * PRIME32_2;
v3 = XXH_rotl32(v3, 13);
v3 *= PRIME32_1;
p+=4;
v4 += XXH_readLE32(p, endian) * PRIME32_2;
v4 = XXH_rotl32(v4, 13);
v4 *= PRIME32_1;
p+=4;
}
while (p<=limit);
state->v1 = v1;
state->v2 = v2;
state->v3 = v3;
state->v4 = v4;
}
if (p < bEnd)
{
XXH_memcpy(state->mem32, p, bEnd-p);
state->memsize = (int)(bEnd-p);
}
return XXH_OK;
}
XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void* input, size_t len)
{
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH32_update_endian(state_in, input, len, XXH_littleEndian);
else
return XXH32_update_endian(state_in, input, len, XXH_bigEndian);
}
FORCE_INLINE U32 XXH32_digest_endian (const XXH32_state_t* state_in, XXH_endianess endian)
{
const XXH_istate32_t* state = (const XXH_istate32_t*) state_in;
const BYTE * p = (const BYTE*)state->mem32;
const BYTE* bEnd = (const BYTE*)(state->mem32) + state->memsize;
U32 h32;
if (state->total_len >= 16)
{
h32 = XXH_rotl32(state->v1, 1) + XXH_rotl32(state->v2, 7) + XXH_rotl32(state->v3, 12) + XXH_rotl32(state->v4, 18);
}
else
{
h32 = state->seed + PRIME32_5;
}
h32 += (U32) state->total_len;
while (p+4<=bEnd)
{
h32 += XXH_readLE32(p, endian) * PRIME32_3;
h32 = XXH_rotl32(h32, 17) * PRIME32_4;
p+=4;
}
while (p<bEnd)
{
h32 += (*p) * PRIME32_5;
h32 = XXH_rotl32(h32, 11) * PRIME32_1;
p++;
}
h32 ^= h32 >> 15;
h32 *= PRIME32_2;
h32 ^= h32 >> 13;
h32 *= PRIME32_3;
h32 ^= h32 >> 16;
return h32;
}
U32 XXH32_digest (const XXH32_state_t* state_in)
{
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH32_digest_endian(state_in, XXH_littleEndian);
else
return XXH32_digest_endian(state_in, XXH_bigEndian);
}
FORCE_INLINE XXH_errorcode XXH64_update_endian (XXH64_state_t* state_in, const void* input, size_t len, XXH_endianess endian)
{
XXH_istate64_t * state = (XXH_istate64_t *) state_in;
const BYTE* p = (const BYTE*)input;
const BYTE* const bEnd = p + len;
#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
if (input==NULL) return XXH_ERROR;
#endif
state->total_len += len;
if (state->memsize + len < 32) /* fill in tmp buffer */
{
XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, len);
state->memsize += (U32)len;
return XXH_OK;
}
if (state->memsize) /* some data left from previous update */
{
XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, 32-state->memsize);
{
const U64* p64 = state->mem64;
state->v1 += XXH_readLE64(p64, endian) * PRIME64_2;
state->v1 = XXH_rotl64(state->v1, 31);
state->v1 *= PRIME64_1;
p64++;
state->v2 += XXH_readLE64(p64, endian) * PRIME64_2;
state->v2 = XXH_rotl64(state->v2, 31);
state->v2 *= PRIME64_1;
p64++;
state->v3 += XXH_readLE64(p64, endian) * PRIME64_2;
state->v3 = XXH_rotl64(state->v3, 31);
state->v3 *= PRIME64_1;
p64++;
state->v4 += XXH_readLE64(p64, endian) * PRIME64_2;
state->v4 = XXH_rotl64(state->v4, 31);
state->v4 *= PRIME64_1;
p64++;
}
p += 32-state->memsize;
state->memsize = 0;
}
if (p+32 <= bEnd)
{
const BYTE* const limit = bEnd - 32;
U64 v1 = state->v1;
U64 v2 = state->v2;
U64 v3 = state->v3;
U64 v4 = state->v4;
do
{
v1 += XXH_readLE64(p, endian) * PRIME64_2;
v1 = XXH_rotl64(v1, 31);
v1 *= PRIME64_1;
p+=8;
v2 += XXH_readLE64(p, endian) * PRIME64_2;
v2 = XXH_rotl64(v2, 31);
v2 *= PRIME64_1;
p+=8;
v3 += XXH_readLE64(p, endian) * PRIME64_2;
v3 = XXH_rotl64(v3, 31);
v3 *= PRIME64_1;
p+=8;
v4 += XXH_readLE64(p, endian) * PRIME64_2;
v4 = XXH_rotl64(v4, 31);
v4 *= PRIME64_1;
p+=8;
}
while (p<=limit);
state->v1 = v1;
state->v2 = v2;
state->v3 = v3;
state->v4 = v4;
}
if (p < bEnd)
{
XXH_memcpy(state->mem64, p, bEnd-p);
state->memsize = (int)(bEnd-p);
}
return XXH_OK;
}
XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void* input, size_t len)
{
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH64_update_endian(state_in, input, len, XXH_littleEndian);
else
return XXH64_update_endian(state_in, input, len, XXH_bigEndian);
}
FORCE_INLINE U64 XXH64_digest_endian (const XXH64_state_t* state_in, XXH_endianess endian)
{
const XXH_istate64_t * state = (const XXH_istate64_t *) state_in;
const BYTE * p = (const BYTE*)state->mem64;
const BYTE* bEnd = (const BYTE*)state->mem64 + state->memsize;
U64 h64;
if (state->total_len >= 32)
{
U64 v1 = state->v1;
U64 v2 = state->v2;
U64 v3 = state->v3;
U64 v4 = state->v4;
h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
v1 *= PRIME64_2;
v1 = XXH_rotl64(v1, 31);
v1 *= PRIME64_1;
h64 ^= v1;
h64 = h64*PRIME64_1 + PRIME64_4;
v2 *= PRIME64_2;
v2 = XXH_rotl64(v2, 31);
v2 *= PRIME64_1;
h64 ^= v2;
h64 = h64*PRIME64_1 + PRIME64_4;
v3 *= PRIME64_2;
v3 = XXH_rotl64(v3, 31);
v3 *= PRIME64_1;
h64 ^= v3;
h64 = h64*PRIME64_1 + PRIME64_4;
v4 *= PRIME64_2;
v4 = XXH_rotl64(v4, 31);
v4 *= PRIME64_1;
h64 ^= v4;
h64 = h64*PRIME64_1 + PRIME64_4;
}
else
{
h64 = state->seed + PRIME64_5;
}
h64 += (U64) state->total_len;
while (p+8<=bEnd)
{
U64 k1 = XXH_readLE64(p, endian);
k1 *= PRIME64_2;
k1 = XXH_rotl64(k1,31);
k1 *= PRIME64_1;
h64 ^= k1;
h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;
p+=8;
}
if (p+4<=bEnd)
{
h64 ^= (U64)(XXH_readLE32(p, endian)) * PRIME64_1;
h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;
p+=4;
}
while (p<bEnd)
{
h64 ^= (*p) * PRIME64_5;
h64 = XXH_rotl64(h64, 11) * PRIME64_1;
p++;
}
h64 ^= h64 >> 33;
h64 *= PRIME64_2;
h64 ^= h64 >> 29;
h64 *= PRIME64_3;
h64 ^= h64 >> 32;
return h64;
}
unsigned long long XXH64_digest (const XXH64_state_t* state_in)
{
XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
return XXH64_digest_endian(state_in, XXH_littleEndian);
else
return XXH64_digest_endian(state_in, XXH_bigEndian);
}

192
lz4/xxhash.h Normal file
View File

@ -0,0 +1,192 @@
/*
xxHash - Extremely Fast Hash algorithm
Header File
Copyright (C) 2012-2015, 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-bits version, named XXH64, is available since r35.
It offers much better speed, but for 64-bits 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
*/
#pragma once
#if defined (__cplusplus)
extern "C" {
#endif
/*****************************
* Definitions
*****************************/
#include <stddef.h> /* size_t */
typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;
/*****************************
* Namespace Emulation
*****************************/
/* Motivations :
If you need to include xxHash into your library,
but wish to avoid xxHash symbols to be present on your library interface
in an effort to avoid potential name collision if another library also includes xxHash,
you can use XXH_NAMESPACE, which will automatically prefix any symbol from xxHash
with the value of XXH_NAMESPACE (so avoid to keep it NULL, and avoid numeric values).
Note that no change is required within the calling program :
it can still call xxHash functions using their regular name.
They 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 XXH32 XXH_NAME2(XXH_NAMESPACE, XXH32)
# define XXH64 XXH_NAME2(XXH_NAMESPACE, XXH64)
# define XXH32_createState XXH_NAME2(XXH_NAMESPACE, XXH32_createState)
# define XXH64_createState XXH_NAME2(XXH_NAMESPACE, XXH64_createState)
# define XXH32_freeState XXH_NAME2(XXH_NAMESPACE, XXH32_freeState)
# define XXH64_freeState XXH_NAME2(XXH_NAMESPACE, XXH64_freeState)
# define XXH32_reset XXH_NAME2(XXH_NAMESPACE, XXH32_reset)
# define XXH64_reset XXH_NAME2(XXH_NAMESPACE, XXH64_reset)
# define XXH32_update XXH_NAME2(XXH_NAMESPACE, XXH32_update)
# define XXH64_update XXH_NAME2(XXH_NAMESPACE, XXH64_update)
# define XXH32_digest XXH_NAME2(XXH_NAMESPACE, XXH32_digest)
# define XXH64_digest XXH_NAME2(XXH_NAMESPACE, XXH64_digest)
#endif
/*****************************
* Simple Hash Functions
*****************************/
unsigned int XXH32 (const void* input, size_t length, unsigned seed);
unsigned long long XXH64 (const void* input, size_t length, unsigned long long seed);
/*
XXH32() :
Calculate the 32-bits 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.
This function successfully passes all SMHasher tests.
Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s
XXH64() :
Calculate the 64-bits hash of sequence of length "len" stored at memory address "input".
Faster on 64-bits systems. Slower on 32-bits systems.
*/
/*****************************
* Advanced Hash Functions
*****************************/
typedef struct { long long ll[ 6]; } XXH32_state_t;
typedef struct { long long ll[11]; } XXH64_state_t;
/*
These structures allow static allocation of XXH states.
States must then be initialized using XXHnn_reset() before first use.
If you prefer dynamic allocation, please refer to functions below.
*/
XXH32_state_t* XXH32_createState(void);
XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr);
XXH64_state_t* XXH64_createState(void);
XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr);
/*
These functions create and release memory for XXH state.
States must then be initialized using XXHnn_reset() before first use.
*/
XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, unsigned seed);
XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input, size_t length);
unsigned int XXH32_digest (const XXH32_state_t* statePtr);
XXH_errorcode XXH64_reset (XXH64_state_t* statePtr, unsigned long long seed);
XXH_errorcode XXH64_update (XXH64_state_t* statePtr, const void* input, size_t length);
unsigned long long XXH64_digest (const XXH64_state_t* statePtr);
/*
These functions calculate the xxHash of an input provided in multiple smaller packets,
as opposed to an input provided as a single block.
XXH state space must first be allocated, using either static or dynamic method provided above.
Start a new hash by initializing state with a seed, using XXHnn_reset().
Then, feed the hash state by calling XXHnn_update() as many times as necessary.
Obviously, input must be valid, meaning allocated and read accessible.
The function returns an error code, with 0 meaning OK, and any other value meaning there is an error.
Finally, you can produce a hash anytime, by using XXHnn_digest().
This function returns the final nn-bits hash.
You can nonetheless continue feeding the hash state with more input,
and therefore get some new hashes, by calling again XXHnn_digest().
When you are done, don't forget to free XXH state space, using typically XXHnn_freeState().
*/
#if defined (__cplusplus)
}
#endif

2
sdrangel.windows.pro
View File

@ -6,8 +6,8 @@
TEMPLATE = subdirs TEMPLATE = subdirs
SUBDIRS = sdrbase SUBDIRS = sdrbase
SUBDIRS += lz4
SUBDIRS += plugins/samplesource/filesource SUBDIRS += plugins/samplesource/filesource
#SUBDIRS += plugins/samplesource/sdrdaemon
SUBDIRS += plugins/channel/demodam SUBDIRS += plugins/channel/demodam
SUBDIRS += plugins/channel/chanalyzer SUBDIRS += plugins/channel/chanalyzer