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Merge pull request #505 from lz4/dev

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update to `dev`
This commit is contained in:
Yann Collet 2018-04-19 17:36:24 -07:00 committed by GitHub
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24 changed files with 2226 additions and 382 deletions
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6
.travis.yml
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@ -14,8 +14,8 @@ matrix:
env: Ubu=12.04cont Cmd='make -C tests test-lz4 test-lz4c test-fullbench' COMPILER=cc
- os: linux
sudo: false
env: Ubu=12.04cont Cmd='make -C tests test-frametest test-fuzzer' COMPILER=cc
sudo: required
env: Ubu=12.04cont Cmd='sudo sysctl -w vm.mmap_min_addr="4096" && make -C tests test-frametest test-fuzzer' COMPILER=cc
- os: linux
sudo: false
@ -59,7 +59,7 @@ matrix:
- libc6-dev-i386
- gcc-multilib
- env: Ubu=14.04 Cmd='make -C tests test-frametest32 test-fuzzer32' COMPILER=cc
- env: Ubu=14.04 Cmd='sudo sysctl -w vm.mmap_min_addr="4096" && make -C tests test-frametest32 test-fuzzer32' COMPILER=cc
dist: trusty
sudo: required
addons:

4
Makefile
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@ -143,10 +143,10 @@ clangtest-native: clean
@CFLAGS="-O3 -Werror -Wconversion -Wno-sign-conversion" $(MAKE) -C $(TESTDIR) native CC=clang
usan: clean
CC=clang CFLAGS="-O3 -g -fsanitize=undefined" $(MAKE) test FUZZER_TIME="-T1mn" NB_LOOPS=-i1
CC=clang CFLAGS="-O3 -g -fsanitize=undefined" $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
usan32: clean
CFLAGS="-m32 -O3 -g -fsanitize=undefined" $(MAKE) test FUZZER_TIME="-T1mn" NB_LOOPS=-i1
CFLAGS="-m32 -O3 -g -fsanitize=undefined" $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
staticAnalyze: clean
CFLAGS=-g scan-build --status-bugs -v $(MAKE) all

14
circle.yml
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@ -11,10 +11,10 @@ test:
- clang -v; make clangtest && make clean
- g++ -v; make gpptest && make clean
- gcc -v; make c_standards && make clean
- gcc-5 -v; make -C tests test-lz4 CC=gcc-5 MOREFLAGS=-Werror && make clean
- gcc-5 -v; make -C tests test-lz4c32 CC=gcc-5 MOREFLAGS="-I/usr/include/x86_64-linux-gnu -Werror" && make clean
- gcc-6 -v; make c_standards CC=gcc-6 && make clean
- gcc-6 -v; make -C tests test-lz4 CC=gcc-6 MOREFLAGS=-Werror && make clean
- gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -Werror" make check && make clean
- gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
- gcc-6 -v; CC=gcc-6 make c_standards && make clean
- gcc-6 -v; CC=gcc-6 MOREFLAGS="-O2 -Werror" make check && make clean
# Shorter tests
- make cmake && make clean
- make -C tests test-lz4
@ -22,11 +22,11 @@ test:
- make -C tests test-frametest
- make -C tests test-fullbench
- make -C tests test-fuzzer && make clean
- make -C lib all && make clean
- pyenv global 3.4.4; CFLAGS=-I/usr/include/x86_64-linux-gnu make versionsTest && make clean
- make -C lib all && make clean
- pyenv global 3.4.4; make versionsTest MOREFLAGS=-I/usr/include/x86_64-linux-gnu && make clean
- make travis-install && make clean
# Longer tests
- gcc -v; make -C tests test32 MOREFLAGS="-I/usr/include/x86_64-linux-gnu" && make clean
- gcc -v; CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
- make usan && make clean
- clang -v; make staticAnalyze && make clean
# Valgrind tests

94
doc/lz4_manual.html
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@ -15,8 +15,9 @@
<li><a href="#Chapter5">Advanced Functions</a></li>
<li><a href="#Chapter6">Streaming Compression Functions</a></li>
<li><a href="#Chapter7">Streaming Decompression Functions</a></li>
<li><a href="#Chapter8">Private definitions</a></li>
<li><a href="#Chapter9">Obsolete Functions</a></li>
<li><a href="#Chapter8">Unstable declarations</a></li>
<li><a href="#Chapter9">Private definitions</a></li>
<li><a href="#Chapter10">Obsolete Functions</a></li>
</ol>
<hr>
<a name="Chapter1"></a><h2>Introduction</h2><pre>
@ -245,21 +246,79 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,
</p></pre><BR>
<a name="Chapter8"></a><h2>Private definitions</h2><pre>
<a name="Chapter8"></a><h2>Unstable declarations</h2><pre>
Declarations in this section should be considered unstable.
Use at your own peril, etc., etc.
They may be removed in the future.
Their signatures may change.
<BR></pre>
<pre><b>void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
</b><p> When an LZ4_stream_t is known to be in a internally coherent state,
it can often be prepared for a new compression with almost no work, only
sometimes falling back to the full, expensive reset that is always required
when the stream is in an indeterminate state (i.e., the reset performed by
LZ4_resetStream()).
LZ4_streams are guaranteed to be in a valid state when:
- returned from LZ4_createStream()
- reset by LZ4_resetStream()
- memset(stream, 0, sizeof(LZ4_stream_t))
- the stream was in a valid state and was reset by LZ4_resetStream_fast()
- the stream was in a valid state and was then used in any compression call
that returned success
- the stream was in an indeterminate state and was used in a compression
call that fully reset the state (LZ4_compress_fast_extState()) and that
returned success
</p></pre><BR>
<pre><b>int LZ4_compress_fast_extState_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
</b><p> A variant of LZ4_compress_fast_extState().
Using this variant avoids an expensive initialization step. It is only safe
to call if the state buffer is known to be correctly initialized already
(see above comment on LZ4_resetStream_fast() for a definition of "correctly
initialized"). From a high level, the difference is that this function
initializes the provided state with a call to LZ4_resetStream_fast() while
LZ4_compress_fast_extState() starts with a call to LZ4_resetStream().
</p></pre><BR>
<pre><b>void LZ4_attach_dictionary(LZ4_stream_t *working_stream, const LZ4_stream_t *dictionary_stream);
</b><p> This is an experimental API that allows for the efficient use of a
static dictionary many times.
Rather than re-loading the dictionary buffer into a working context before
each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
working LZ4_stream_t, this function introduces a no-copy setup mechanism,
in which the working stream references the dictionary stream in-place.
Several assumptions are made about the state of the dictionary stream.
Currently, only streams which have been prepared by LZ4_loadDict() should
be expected to work.
Alternatively, the provided dictionary stream pointer may be NULL, in which
case any existing dictionary stream is unset.
If a dictionary is provided, it replaces any pre-existing stream history.
The dictionary contents are the only history that can be referenced and
logically immediately precede the data compressed in the first subsequent
compression call.
The dictionary will only remain attached to the working stream through the
first compression call, at the end of which it is cleared. The dictionary
stream (and source buffer) must remain in-place / accessible / unchanged
through the completion of the first compression call on the stream.
</p></pre><BR>
<a name="Chapter9"></a><h2>Private definitions</h2><pre>
Do not use these definitions.
They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
Using these definitions will expose code to API and/or ABI break in future versions of the library.
<BR></pre>
<pre><b>typedef struct {
uint32_t hashTable[LZ4_HASH_SIZE_U32];
uint32_t currentOffset;
uint32_t initCheck;
const uint8_t* dictionary;
uint8_t* bufferStart; </b>/* obsolete, used for slideInputBuffer */<b>
uint32_t dictSize;
} LZ4_stream_t_internal;
</b></pre><BR>
<pre><b>typedef struct {
const uint8_t* externalDict;
size_t extDictSize;
@ -267,15 +326,6 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,
size_t prefixSize;
} LZ4_streamDecode_t_internal;
</b></pre><BR>
<pre><b>typedef struct {
unsigned int hashTable[LZ4_HASH_SIZE_U32];
unsigned int currentOffset;
unsigned int initCheck;
const unsigned char* dictionary;
unsigned char* bufferStart; </b>/* obsolete, used for slideInputBuffer */<b>
unsigned int dictSize;
} LZ4_stream_t_internal;
</b></pre><BR>
<pre><b>typedef struct {
const unsigned char* externalDict;
size_t extDictSize;
@ -311,7 +361,7 @@ union LZ4_streamDecode_u {
</p></pre><BR>
<a name="Chapter9"></a><h2>Obsolete Functions</h2><pre></pre>
<a name="Chapter10"></a><h2>Obsolete Functions</h2><pre></pre>
<pre><b>#ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
# define LZ4_DEPRECATED(message) </b>/* disable deprecation warnings */<b>

50
doc/lz4frame_manual.html
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@ -30,9 +30,9 @@
<a name="Chapter3"></a><h2>Error management</h2><pre></pre>
<pre><b>unsigned LZ4F_isError(LZ4F_errorCode_t code); </b>/**< tells if a `LZ4F_errorCode_t` function result is an error code */<b>
<pre><b>unsigned LZ4F_isError(LZ4F_errorCode_t code); </b>/**< tells when a function result is an error code */<b>
</b></pre><BR>
<pre><b>const char* LZ4F_getErrorName(LZ4F_errorCode_t code); </b>/**< return error code string; useful for debugging */<b>
<pre><b>const char* LZ4F_getErrorName(LZ4F_errorCode_t code); </b>/**< return error code string; for debugging */<b>
</b></pre><BR>
<a name="Chapter4"></a><h2>Frame compression types</h2><pre></pre>
@ -74,13 +74,13 @@
} LZ4F_frameType_t;
</b></pre><BR>
<pre><b>typedef struct {
LZ4F_blockSizeID_t blockSizeID; </b>/* max64KB, max256KB, max1MB, max4MB ; 0 == default */<b>
LZ4F_blockMode_t blockMode; </b>/* LZ4F_blockLinked, LZ4F_blockIndependent ; 0 == default */<b>
LZ4F_contentChecksum_t contentChecksumFlag; </b>/* if enabled, frame is terminated with a 32-bits checksum of decompressed data ; 0 == disabled (default) */<b>
LZ4F_frameType_t frameType; </b>/* read-only field : LZ4F_frame or LZ4F_skippableFrame */<b>
unsigned long long contentSize; </b>/* Size of uncompressed content ; 0 == unknown */<b>
unsigned dictID; </b>/* Dictionary ID, sent by the compressor to help decoder select the correct dictionary; 0 == no dictID provided */<b>
LZ4F_blockChecksum_t blockChecksumFlag; </b>/* if enabled, each block is followed by a checksum of block's compressed data ; 0 == disabled (default) */<b>
LZ4F_blockSizeID_t blockSizeID; </b>/* max64KB, max256KB, max1MB, max4MB; 0 == default */<b>
LZ4F_blockMode_t blockMode; </b>/* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default */<b>
LZ4F_contentChecksum_t contentChecksumFlag; </b>/* 1: frame terminated with 32-bit checksum of decompressed data; 0: disabled (default) */<b>
LZ4F_frameType_t frameType; </b>/* read-only field : LZ4F_frame or LZ4F_skippableFrame */<b>
unsigned long long contentSize; </b>/* Size of uncompressed content ; 0 == unknown */<b>
unsigned dictID; </b>/* Dictionary ID, sent by compressor to help decoder select correct dictionary; 0 == no dictID provided */<b>
LZ4F_blockChecksum_t blockChecksumFlag; </b>/* 1: each block followed by a checksum of block's compressed data; 0: disabled (default) */<b>
} LZ4F_frameInfo_t;
</b><p> makes it possible to set or read frame parameters.
It's not required to set all fields, as long as the structure was initially memset() to zero.
@ -89,7 +89,7 @@
<pre><b>typedef struct {
LZ4F_frameInfo_t frameInfo;
int compressionLevel; </b>/* 0 == default (fast mode); values above LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values below 0 trigger "fast acceleration", proportional to value */<b>
int compressionLevel; </b>/* 0: default (fast mode); values > LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values < 0 trigger "fast acceleration" */<b>
unsigned autoFlush; </b>/* 1 == always flush, to reduce usage of internal buffers */<b>
unsigned reserved[4]; </b>/* must be zero for forward compatibility */<b>
} LZ4F_preferences_t;
@ -165,34 +165,42 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
</p></pre><BR>
<pre><b>size_t LZ4F_compressUpdate(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const void* srcBuffer, size_t srcSize, const LZ4F_compressOptions_t* cOptPtr);
<pre><b>size_t LZ4F_compressUpdate(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const void* srcBuffer, size_t srcSize,
const LZ4F_compressOptions_t* cOptPtr);
</b><p> LZ4F_compressUpdate() can be called repetitively to compress as much data as necessary.
An important rule is that dstCapacity MUST be large enough to ensure operation success even in worst case situations.
Important rule: dstCapacity MUST be large enough to ensure operation success even in worst case situations.
This value is provided by LZ4F_compressBound().
If this condition is not respected, LZ4F_compress() will fail (result is an errorCode).
LZ4F_compressUpdate() doesn't guarantee error recovery. When an error occurs, compression context must be freed or resized.
LZ4F_compressUpdate() doesn't guarantee error recovery.
When an error occurs, compression context must be freed or resized.
`cOptPtr` is optional : NULL can be provided, in which case all options are set to default.
@return : number of bytes written into `dstBuffer` (it can be zero, meaning input data was just buffered).
or an error code if it fails (which can be tested using LZ4F_isError())
</p></pre><BR>
<pre><b>size_t LZ4F_flush(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const LZ4F_compressOptions_t* cOptPtr);
<pre><b>size_t LZ4F_flush(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const LZ4F_compressOptions_t* cOptPtr);
</b><p> When data must be generated and sent immediately, without waiting for a block to be completely filled,
it's possible to call LZ4_flush(). It will immediately compress any data buffered within cctx.
`dstCapacity` must be large enough to ensure the operation will be successful.
`cOptPtr` is optional : it's possible to provide NULL, all options will be set to default.
@return : number of bytes written into dstBuffer (it can be zero, which means there was no data stored within cctx)
@return : nb of bytes written into dstBuffer (can be zero, when there is no data stored within cctx)
or an error code if it fails (which can be tested using LZ4F_isError())
</p></pre><BR>
<pre><b>size_t LZ4F_compressEnd(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const LZ4F_compressOptions_t* cOptPtr);
<pre><b>size_t LZ4F_compressEnd(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const LZ4F_compressOptions_t* cOptPtr);
</b><p> To properly finish an LZ4 frame, invoke LZ4F_compressEnd().
It will flush whatever data remained within `cctx` (like LZ4_flush())
and properly finalize the frame, with an endMark and a checksum.
`cOptPtr` is optional : NULL can be provided, in which case all options will be set to default.
@return : number of bytes written into dstBuffer (necessarily >= 4 (endMark), or 8 if optional frame checksum is enabled)
@return : nb of bytes written into dstBuffer, necessarily >= 4 (endMark),
or an error code if it fails (which can be tested using LZ4F_isError())
A successful call to LZ4F_compressEnd() makes `cctx` available again for another compression task.
@ -201,7 +209,7 @@ LZ4F_errorCode_t LZ4F_freeCompressionContext(LZ4F_cctx* cctx);
<a name="Chapter9"></a><h2>Decompression functions</h2><pre></pre>
<pre><b>typedef struct {
unsigned stableDst; </b>/* pledge that at least 64KB+64Bytes of previously decompressed data remain unmodifed where it was decoded. This optimization skips storage operations in tmp buffers */<b>
unsigned stableDst; </b>/* pledges that last 64KB decompressed data will remain available unmodified. This optimization skips storage operations in tmp buffers. */<b>
unsigned reserved[3]; </b>/* must be set to zero for forward compatibility */<b>
} LZ4F_decompressOptions_t;
</b></pre><BR>
@ -212,7 +220,7 @@ LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_dctx* dctx);
The function provides a pointer to an allocated and initialized LZ4F_dctx 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.
Result of LZ4F_freeDecompressionContext() indicates current state of decompressionContext when being released.
That is, it should be == 0 if decompression has been completed fully and correctly.
</p></pre><BR>
@ -252,8 +260,8 @@ LZ4F_errorCode_t LZ4F_freeDecompressionContext(LZ4F_dctx* dctx);
The function will read up to *srcSizePtr bytes from srcBuffer,
and decompress data into dstBuffer, of capacity *dstSizePtr.
The number of bytes consumed from srcBuffer will be written into *srcSizePtr (necessarily <= original value).
The number of bytes decompressed into dstBuffer will be written into *dstSizePtr (necessarily <= original value).
The nb of bytes consumed from srcBuffer will be written into *srcSizePtr (necessarily <= original value).
The nb of bytes decompressed into dstBuffer will be written into *dstSizePtr (necessarily <= original value).
The function does not necessarily read all input bytes, so always check value in *srcSizePtr.
Unconsumed source data must be presented again in subsequent invocations.

4
lib/Makefile
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@ -116,6 +116,10 @@ clean:
#-----------------------------------------------------------------------------
ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS))
.PHONY: listL120
listL120: # extract lines >= 120 characters in *.{c,h}, by Takayuki Matsuoka (note : $$, for Makefile compatibility)
find . -type f -name '*.c' -o -name '*.h' | while read -r filename; do awk 'length > 120 {print FILENAME "(" FNR "): " $$0}' $$filename; done
DESTDIR ?=
# directory variables : GNU conventions prefer lowercase
# see https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html

532
lib/lz4.c
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@ -69,7 +69,9 @@
* Prefer these methods in priority order (0 > 1 > 2)
*/
#ifndef LZ4_FORCE_MEMORY_ACCESS /* can be defined externally */
# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
# if defined(__GNUC__) && \
( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) \
|| defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
# define LZ4_FORCE_MEMORY_ACCESS 2
# elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || defined(__GNUC__)
# define LZ4_FORCE_MEMORY_ACCESS 1
@ -80,7 +82,7 @@
* LZ4_FORCE_SW_BITCOUNT
* Define this parameter if your target system or compiler does not support hardware bit count
*/
#if defined(_MSC_VER) && defined(_WIN32_WCE) /* Visual Studio for Windows CE does not support Hardware bit count */
#if defined(_MSC_VER) && defined(_WIN32_WCE) /* Visual Studio for WinCE doesn't support Hardware bit count */
# define LZ4_FORCE_SW_BITCOUNT
#endif
@ -89,6 +91,7 @@
/*-************************************
* Dependency
**************************************/
#define LZ4_STATIC_LINKING_ONLY
#include "lz4.h"
/* see also "memory routines" below */
@ -146,8 +149,12 @@
# define expect(expr,value) (expr)
#endif
#ifndef likely
#define likely(expr) expect((expr) != 0, 1)
#endif
#ifndef unlikely
#define unlikely(expr) expect((expr) != 0, 0)
#endif
/*-************************************
@ -317,7 +324,7 @@ static const int LZ4_minLength = (MFLIMIT+1);
# endif
#endif
#define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
#define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use after variable declarations */
#if defined(LZ4_DEBUG) && (LZ4_DEBUG>=2)
# include <stdio.h>
@ -516,7 +523,21 @@ LZ4_FORCE_INLINE U32 LZ4_hashPosition(const void* const p, tableType_t const tab
return LZ4_hash4(LZ4_read32(p), tableType);
}
static void LZ4_putPositionOnHash(const BYTE* p, U32 h, void* tableBase, tableType_t const tableType, const BYTE* srcBase)
static void LZ4_putIndexOnHash(U32 idx, U32 h, void* tableBase, tableType_t const tableType)
{
switch (tableType)
{
default: /* fallthrough */
case clearedTable: /* fallthrough */
case byPtr: { /* illegal! */ assert(0); return; }
case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = idx; return; }
case byU16: { U16* hashTable = (U16*) tableBase; assert(idx < 65536); hashTable[h] = (U16)idx; return; }
}
}
static void LZ4_putPositionOnHash(const BYTE* p, U32 h,
void* tableBase, tableType_t const tableType,
const BYTE* srcBase)
{
switch (tableType)
{
@ -533,6 +554,28 @@ LZ4_FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_
LZ4_putPositionOnHash(p, h, tableBase, tableType, srcBase);
}
/* LZ4_getIndexOnHash() :
* Index of match position registered in hash table.
* hash position must be calculated by using base+index, or dictBase+index.
* Assumption 1 : only valid if tableType == byU32 or byU16.
* Assumption 2 : h is presumed valid (within limits of hash table)
*/
static U32 LZ4_getIndexOnHash(U32 h, const void* tableBase, tableType_t tableType)
{
LZ4_STATIC_ASSERT(LZ4_MEMORY_USAGE > 2);
if (tableType == byU32) {
const U32* const hashTable = (const U32*) tableBase;
assert(h < (1U << (LZ4_MEMORY_USAGE-2)));
return hashTable[h];
}
if (tableType == byU16) {
const U16* const hashTable = (const U16*) tableBase;
assert(h < (1U << (LZ4_MEMORY_USAGE-1)));
return hashTable[h];
}
assert(0); return 0; /* forbidden case */
}
static const BYTE* LZ4_getPositionOnHash(U32 h, const void* tableBase, tableType_t tableType, const BYTE* srcBase)
{
if (tableType == byPtr) { const BYTE* const* hashTable = (const BYTE* const*) tableBase; return hashTable[h]; }
@ -540,18 +583,18 @@ static const BYTE* LZ4_getPositionOnHash(U32 h, const void* tableBase, tableType
{ const U16* const hashTable = (const U16*) tableBase; return hashTable[h] + srcBase; } /* default, to ensure a return */
}
LZ4_FORCE_INLINE const BYTE* LZ4_getPosition(const BYTE* p, const void* tableBase, tableType_t tableType, const BYTE* srcBase)
LZ4_FORCE_INLINE const BYTE* LZ4_getPosition(const BYTE* p,
const void* tableBase, tableType_t tableType,
const BYTE* srcBase)
{
U32 const h = LZ4_hashPosition(p, tableType);
return LZ4_getPositionOnHash(h, tableBase, tableType, srcBase);
}
LZ4_FORCE_INLINE void LZ4_prepareTable(
LZ4_stream_t_internal* const cctx,
const int inputSize,
const tableType_t tableType,
const dict_directive dictDirective) {
const tableType_t tableType) {
/* If the table hasn't been used, it's guaranteed to be zeroed out, and is
* therefore safe to use no matter what mode we're in. Otherwise, we figure
* out if it's safe to leave as is or whether it needs to be reset.
@ -563,23 +606,28 @@ LZ4_FORCE_INLINE void LZ4_prepareTable(
|| tableType == byPtr
|| inputSize >= 4 KB)
{
DEBUGLOG(4, "Resetting table in %p", cctx);
DEBUGLOG(4, "LZ4_prepareTable: Resetting table in %p", cctx);
MEM_INIT(cctx->hashTable, 0, LZ4_HASHTABLESIZE);
cctx->currentOffset = 0;
cctx->tableType = clearedTable;
} else {
DEBUGLOG(4, "LZ4_prepareTable: Re-use hash table (no reset)");
}
}
/* If the current offset is zero, we will never look in the external
* dictionary context, since there is no value a table entry can take that
* indicates a miss. In that case, we need to bump the offset to something
* non-zero.
/* Adding a gap, so all previous entries are > MAX_DISTANCE back, is faster
* than compressing without a gap. However, compressing with
* currentOffset == 0 is faster still, so we preserve that case.
*/
if (dictDirective == usingDictCtx &&
tableType != byPtr &&
cctx->currentOffset == 0)
{
cctx->currentOffset = 1;
if (cctx->currentOffset != 0 && tableType == byU32) {
DEBUGLOG(5, "LZ4_prepareTable: adding 64KB to currentOffset");
cctx->currentOffset += 64 KB;
}
/* Finally, clear history */
cctx->dictCtx = NULL;
cctx->dictionary = NULL;
cctx->dictSize = 0;
}
/** LZ4_compress_generic() :
@ -598,8 +646,8 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
{
const BYTE* ip = (const BYTE*) source;
size_t currentOffset = cctx->currentOffset;
const BYTE* base = (const BYTE*) source - currentOffset;
U32 const startIndex = cctx->currentOffset;
const BYTE* base = (const BYTE*) source - startIndex;
const BYTE* lowLimit;
const LZ4_stream_t_internal* dictCtx = (const LZ4_stream_t_internal*) cctx->dictCtx;
@ -607,8 +655,10 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
dictDirective == usingDictCtx ? dictCtx->dictionary : cctx->dictionary;
const U32 dictSize =
dictDirective == usingDictCtx ? dictCtx->dictSize : cctx->dictSize;
const U32 dictDelta = (dictDirective == usingDictCtx) ? startIndex - dictCtx->currentOffset : 0; /* make indexes in dictCtx comparable with index in current context */
const BYTE* const lowRefLimit = (const BYTE*) source - dictSize;
int const maybe_extMem = (dictDirective == usingExtDict) || (dictDirective == usingDictCtx);
U32 const prefixIdxLimit = startIndex - dictSize; /* used when dictDirective == dictSmall */
const BYTE* const dictEnd = dictionary + dictSize;
const BYTE* anchor = (const BYTE*) source;
const BYTE* const iend = ip + inputSize;
@ -618,26 +668,38 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
/* the dictCtx currentOffset is indexed on the start of the dictionary,
* while a dictionary in the current context precedes the currentOffset */
const BYTE* dictBase = dictDirective == usingDictCtx ?
(const BYTE*) source - dictCtx->currentOffset :
(const BYTE*) source - dictSize - currentOffset;
const ptrdiff_t dictDelta = dictionary ? dictEnd - (const BYTE*) source : 0;
const BYTE* dictLowLimit;
dictionary + dictSize - dictCtx->currentOffset :
dictionary + dictSize - startIndex;
BYTE* op = (BYTE*) dest;
BYTE* const olimit = op + maxOutputSize;
ptrdiff_t retval = 0;
U32 offset = 0;
U32 forwardH;
DEBUGLOG(5, "LZ4_compress_generic: srcSize=%i, tableType=%u", inputSize, tableType);
/* Init conditions */
if ((U32)inputSize > (U32)LZ4_MAX_INPUT_SIZE) return 0; /* Unsupported inputSize, too large (or negative) */
if (tableType==byPtr) assert(dictDirective==noDict); /* only supported use case with byPtr */
assert(acceleration >= 1);
lowLimit = (const BYTE*)source - (dictDirective == withPrefix64k ? dictSize : 0);
dictLowLimit = dictionary ? dictionary : lowLimit;
if ((tableType == byU16) && (inputSize>=LZ4_64Klimit)) return 0; /* Size too large (not within 64K limit) */
if (inputSize<LZ4_minLength) goto _last_literals; /* Input too small, no compression (all literals) */
if ((tableType == byU16) && (inputSize>=LZ4_64Klimit)) return 0; /* Size too large (not within 64K limit) */
/* Update context state */
if (dictDirective == usingDictCtx) {
/* Subsequent linked blocks can't use the dictionary. */
/* Instead, they use the block we just compressed. */
cctx->dictCtx = NULL;
cctx->dictSize = (U32)inputSize;
} else {
cctx->dictSize += (U32)inputSize;
}
cctx->currentOffset += (U32)inputSize;
cctx->tableType = tableType;
if (inputSize<LZ4_minLength) goto _last_literals; /* Input too small, no compression (all literals) */
/* First Byte */
LZ4_putPosition(ip, cctx->hashTable, tableType, base);
@ -645,12 +707,12 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
/* Main Loop */
for ( ; ; ) {
ptrdiff_t refDelta = 0;
const BYTE* match;
BYTE* token;
/* Find a match */
{ const BYTE* forwardIp = ip;
if (tableType == byPtr) {
const BYTE* forwardIp = ip;
unsigned step = 1;
unsigned searchMatchNb = acceleration << LZ4_skipTrigger;
do {
@ -663,41 +725,78 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
assert(ip < mflimitPlusOne);
match = LZ4_getPositionOnHash(h, cctx->hashTable, tableType, base);
if (dictDirective == usingDictCtx) {
if (match < (const BYTE*)source) {
/* there was no match, try the dictionary */
match = LZ4_getPosition(ip, dictCtx->hashTable, byU32, dictBase);
refDelta = dictDelta;
lowLimit = dictLowLimit;
} else {
refDelta = 0;
lowLimit = (const BYTE*)source;
}
} else if (dictDirective==usingExtDict) {
if (match < (const BYTE*)source) {
refDelta = dictDelta;
lowLimit = dictLowLimit;
} else {
refDelta = 0;
lowLimit = (const BYTE*)source;
} }
forwardH = LZ4_hashPosition(forwardIp, tableType);
LZ4_putPositionOnHash(ip, h, cctx->hashTable, tableType, base);
} while ( ((dictIssue==dictSmall) ? (match < lowRefLimit) : 0)
|| ((tableType==byU16) ? 0 : (match + MAX_DISTANCE < ip))
|| (LZ4_read32(match+refDelta) != LZ4_read32(ip)) );
} while ( (match+MAX_DISTANCE < ip)
|| (LZ4_read32(match) != LZ4_read32(ip)) );
} else { /* byU32, byU16 */
const BYTE* forwardIp = ip;
unsigned step = 1;
unsigned searchMatchNb = acceleration << LZ4_skipTrigger;
do {
U32 const h = forwardH;
U32 const current = (U32)(forwardIp - base);
U32 matchIndex = LZ4_getIndexOnHash(h, cctx->hashTable, tableType);
assert(matchIndex <= current);
assert(forwardIp - base < (ptrdiff_t)(2 GB - 1));
ip = forwardIp;
forwardIp += step;
step = (searchMatchNb++ >> LZ4_skipTrigger);
if (unlikely(forwardIp > mflimitPlusOne)) goto _last_literals;
assert(ip < mflimitPlusOne);
if (dictDirective == usingDictCtx) {
if (matchIndex < startIndex) {
/* there was no match, try the dictionary */
assert(tableType == byU32);
matchIndex = LZ4_getIndexOnHash(h, dictCtx->hashTable, byU32);
match = dictBase + matchIndex;
matchIndex += dictDelta; /* make dictCtx index comparable with current context */
lowLimit = dictionary;
} else {
match = base + matchIndex;
lowLimit = (const BYTE*)source;
}
} else if (dictDirective==usingExtDict) {
if (matchIndex < startIndex) {
DEBUGLOG(7, "extDict candidate: matchIndex=%5u < startIndex=%5u", matchIndex, startIndex);
match = dictBase + matchIndex;
lowLimit = dictionary;
} else {
match = base + matchIndex;
lowLimit = (const BYTE*)source;
}
} else { /* single continuous memory segment */
match = base + matchIndex;
}
forwardH = LZ4_hashPosition(forwardIp, tableType);
LZ4_putIndexOnHash(current, h, cctx->hashTable, tableType);
if ((dictIssue == dictSmall) && (matchIndex < prefixIdxLimit)) continue; /* match outside of valid area */
if ((tableType != byU16) && (current - matchIndex > MAX_DISTANCE)) continue; /* too far - note: works even if matchIndex overflows */
if (tableType == byU16) assert((current - matchIndex) <= MAX_DISTANCE); /* too_far presumed impossible with byU16 */
if (LZ4_read32(match) == LZ4_read32(ip)) {
if (maybe_extMem) offset = current - matchIndex;
break; /* match found */
}
} while(1);
}
/* Catch up */
while (((ip>anchor) & (match+refDelta > lowLimit)) && (unlikely(ip[-1]==match[refDelta-1]))) { ip--; match--; }
while (((ip>anchor) & (match > lowLimit)) && (unlikely(ip[-1]==match[-1]))) { ip--; match--; }
/* Encode Literals */
{ unsigned const litLength = (unsigned)(ip - anchor);
token = op++;
if ((outputLimited) && /* Check output buffer overflow */
(unlikely(op + litLength + (2 + 1 + LASTLITERALS) + (litLength/255) > olimit)))
goto _clean_up;
return 0;
if (litLength >= RUN_MASK) {
int len = (int)litLength-RUN_MASK;
*token = (RUN_MASK<<ML_BITS);
@ -709,35 +808,55 @@ LZ4_FORCE_INLINE int LZ4_compress_generic(
/* Copy Literals */
LZ4_wildCopy(op, anchor, op+litLength);
op+=litLength;
DEBUGLOG(6, "seq.start:%i, literals=%u, match.start:%i",
(int)(anchor-(const BYTE*)source), litLength, (int)(ip-(const BYTE*)source));
}
_next_match:
/* at this stage, the following variables must be correctly set :
* - ip : at start of LZ operation
* - match : at start of previous pattern occurence; can be within current prefix, or within extDict
* - offset : if maybe_ext_memSegment==1 (constant)
* - lowLimit : must be == dictionary to mean "match is within extDict"; must be == source otherwise
* - token and *token : position to write 4-bits for match length; higher 4-bits for literal length supposed already written
*/
/* Encode Offset */
LZ4_writeLE16(op, (U16)(ip-match)); op+=2;
if (maybe_extMem) { /* static test */
DEBUGLOG(6, " with offset=%u (ext if > %i)", offset, (int)(ip - (const BYTE*)source));
assert(offset <= MAX_DISTANCE && offset > 0);
LZ4_writeLE16(op, (U16)offset); op+=2;
} else {
DEBUGLOG(6, " with offset=%u (same segment)", (U32)(ip - match));
assert(ip-match <= MAX_DISTANCE);
LZ4_writeLE16(op, (U16)(ip - match)); op+=2;
}
/* Encode MatchLength */
{ unsigned matchCode;
if ((dictDirective==usingExtDict || dictDirective==usingDictCtx) && lowLimit==dictionary) {
const BYTE* limit;
match += refDelta;
limit = ip + (dictEnd-match);
if ( (dictDirective==usingExtDict || dictDirective==usingDictCtx)
&& (lowLimit==dictionary) /* match within extDict */ ) {
const BYTE* limit = ip + (dictEnd-match);
assert(dictEnd > match);
if (limit > matchlimit) limit = matchlimit;
matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, limit);
ip += MINMATCH + matchCode;
if (ip==limit) {
unsigned const more = LZ4_count(ip, (const BYTE*)source, matchlimit);
unsigned const more = LZ4_count(limit, (const BYTE*)source, matchlimit);
matchCode += more;
ip += more;
}
DEBUGLOG(6, " with matchLength=%u starting in extDict", matchCode+MINMATCH);
} else {
matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, matchlimit);
ip += MINMATCH + matchCode;
DEBUGLOG(6, " with matchLength=%u", matchCode+MINMATCH);
}
if ( outputLimited && /* Check output buffer overflow */
(unlikely(op + (1 + LASTLITERALS) + (matchCode>>8) > olimit)) )
goto _clean_up;
return 0;
if (matchCode >= ML_MASK) {
*token += ML_MASK;
matchCode -= ML_MASK;
@ -762,33 +881,58 @@ _next_match:
LZ4_putPosition(ip-2, cctx->hashTable, tableType, base);
/* Test next position */
match = LZ4_getPosition(ip, cctx->hashTable, tableType, base);
if (dictDirective == usingDictCtx) {
if (match < (const BYTE*)source) {
/* there was no match, try the dictionary */
match = LZ4_getPosition(ip, dictCtx->hashTable, byU32, dictBase);
refDelta = dictDelta;
lowLimit = dictLowLimit;
} else {
refDelta = 0;
lowLimit = (const BYTE*)source;
if (tableType == byPtr) {
match = LZ4_getPosition(ip, cctx->hashTable, tableType, base);
LZ4_putPosition(ip, cctx->hashTable, tableType, base);
if ( (match+MAX_DISTANCE >= ip)
&& (LZ4_read32(match) == LZ4_read32(ip)) )
{ token=op++; *token=0; goto _next_match; }
} else { /* byU32, byU16 */
U32 const h = LZ4_hashPosition(ip, tableType);
U32 const current = (U32)(ip-base);
U32 matchIndex = LZ4_getIndexOnHash(h, cctx->hashTable, tableType);
assert(matchIndex < current);
if (dictDirective == usingDictCtx) {
if (matchIndex < startIndex) {
/* there was no match, try the dictionary */
matchIndex = LZ4_getIndexOnHash(h, dictCtx->hashTable, byU32);
match = dictBase + matchIndex;
lowLimit = dictionary; /* required for match length counter */
matchIndex += dictDelta;
} else {
match = base + matchIndex;
lowLimit = (const BYTE*)source; /* required for match length counter */
}
} else if (dictDirective==usingExtDict) {
if (matchIndex < startIndex) {
match = dictBase + matchIndex;
lowLimit = dictionary; /* required for match length counter */
} else {
match = base + matchIndex;
lowLimit = (const BYTE*)source; /* required for match length counter */
}
} else { /* single memory segment */
match = base + matchIndex;
}
} else if (dictDirective==usingExtDict) {
if (match < (const BYTE*)source) {
refDelta = dictDelta;
lowLimit = dictLowLimit;
} else {
refDelta = 0;
lowLimit = (const BYTE*)source;
} }
LZ4_putPosition(ip, cctx->hashTable, tableType, base);
if ( ((dictIssue==dictSmall) ? (match>=lowRefLimit) : 1)
&& (match+MAX_DISTANCE>=ip)
&& (LZ4_read32(match+refDelta)==LZ4_read32(ip)) )
{ token=op++; *token=0; goto _next_match; }
LZ4_putIndexOnHash(current, h, cctx->hashTable, tableType);
if ( ((dictIssue==dictSmall) ? (matchIndex >= prefixIdxLimit) : 1)
&& ((tableType==byU16) ? 1 : (current - matchIndex <= MAX_DISTANCE))
&& (LZ4_read32(match) == LZ4_read32(ip)) ) {
token=op++;
*token=0;
if (maybe_extMem) offset = current - matchIndex;
DEBUGLOG(6, "seq.start:%i, literals=%u, match.start:%i",
(int)(anchor-(const BYTE*)source), 0, (int)(ip-(const BYTE*)source));
goto _next_match;
}
}
/* Prepare next loop */
forwardH = LZ4_hashPosition(++ip, tableType);
}
_last_literals:
@ -796,7 +940,7 @@ _last_literals:
{ size_t const lastRun = (size_t)(iend - anchor);
if ( (outputLimited) && /* Check output buffer overflow */
((op - (BYTE*)dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize) )
goto _clean_up;
return 0;
if (lastRun >= RUN_MASK) {
size_t accumulator = lastRun - RUN_MASK;
*op++ = RUN_MASK << ML_BITS;
@ -809,22 +953,7 @@ _last_literals:
op += lastRun;
}
retval = (((char*)op)-dest);
_clean_up:
if (dictDirective == usingDictCtx) {
/* Subsequent linked blocks can't use the dictionary. */
/* Instead, they use the block we just compressed. */
cctx->dictCtx = NULL;
cctx->dictSize = (U32)inputSize;
} else {
cctx->dictSize += (U32)inputSize;
}
cctx->currentOffset += (U32)inputSize;
cctx->tableType = tableType;
/* End */
return (int)retval;
return (int)(((char*)op) - dest);
}
@ -837,68 +966,60 @@ int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int
if (inputSize < LZ4_64Klimit) {
return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue, acceleration);
} else {
const tableType_t tableType = (sizeof(void*)==8) ? byU32 : byPtr;
const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > MAX_DISTANCE)) ? byPtr : byU32;
return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
}
} else {
if (inputSize < LZ4_64Klimit) {;
return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration);
} else {
const tableType_t tableType = (sizeof(void*)==8) ? byU32 : byPtr;
const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > MAX_DISTANCE)) ? byPtr : byU32;
return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, noDict, noDictIssue, acceleration);
}
}
}
/**
* LZ4_compress_fast_extState_noReset is a variant of LZ4_compress_fast_extState
* that can be used when the state is known to have already been initialized
* (via LZ4_resetStream or an earlier call to LZ4_compress_fast_extState /
* LZ4_compress_fast_extState_noReset). This can provide significantly better
* performance when the context reset would otherwise be a significant part of
* the cost of the compression, e.g., when the data to be compressed is small.
* LZ4_compress_fast_extState_fastReset() :
* A variant of LZ4_compress_fast_extState().
*
* Using this variant avoids an expensive initialization step. It is only safe
* to call if the state buffer is known to be correctly initialized already
* (see comment in lz4.h on LZ4_resetStream_fast() for a definition of
* "correctly initialized").
*/
int LZ4_compress_fast_extState_noReset(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
int LZ4_compress_fast_extState_fastReset(void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration)
{
LZ4_stream_t_internal* ctx = &((LZ4_stream_t*)state)->internal_donotuse;
if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
ctx->dictionary = NULL;
ctx->dictSize = 0;
ctx->dictCtx = NULL;
if (maxOutputSize >= LZ4_compressBound(inputSize)) {
if (inputSize < LZ4_64Klimit) {
if (dstCapacity >= LZ4_compressBound(srcSize)) {
if (srcSize < LZ4_64Klimit) {
const tableType_t tableType = byU16;
LZ4_prepareTable(ctx, inputSize, tableType, noDict);
LZ4_prepareTable(ctx, srcSize, tableType);
if (ctx->currentOffset) {
return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, tableType, noDict, dictSmall, acceleration);
return LZ4_compress_generic(ctx, src, dst, srcSize, 0, notLimited, tableType, noDict, dictSmall, acceleration);
} else {
return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
return LZ4_compress_generic(ctx, src, dst, srcSize, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
}
} else {
const tableType_t tableType = (sizeof(void*)==8) ? byU32 : byPtr;
LZ4_prepareTable(ctx, inputSize, tableType, noDict);
if (ctx->currentOffset) {
ctx->currentOffset += 64 KB;
}
return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)src > MAX_DISTANCE)) ? byPtr : byU32;
LZ4_prepareTable(ctx, srcSize, tableType);
return LZ4_compress_generic(ctx, src, dst, srcSize, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
}
} else {
if (inputSize < LZ4_64Klimit) {
if (srcSize < LZ4_64Klimit) {
const tableType_t tableType = byU16;
LZ4_prepareTable(ctx, inputSize, tableType, noDict);
LZ4_prepareTable(ctx, srcSize, tableType);
if (ctx->currentOffset) {
return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, noDict, dictSmall, acceleration);
return LZ4_compress_generic(ctx, src, dst, srcSize, dstCapacity, limitedOutput, tableType, noDict, dictSmall, acceleration);
} else {
return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, noDict, noDictIssue, acceleration);
return LZ4_compress_generic(ctx, src, dst, srcSize, dstCapacity, limitedOutput, tableType, noDict, noDictIssue, acceleration);
}
} else {
const tableType_t tableType = (sizeof(void*)==8) ? byU32 : byPtr;
LZ4_prepareTable(ctx, inputSize, tableType, noDict);
if (ctx->currentOffset) {
ctx->currentOffset += 64 KB;
}
return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, noDict, noDictIssue, acceleration);
const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)src > MAX_DISTANCE)) ? byPtr : byU32;
LZ4_prepareTable(ctx, srcSize, tableType);
return LZ4_compress_generic(ctx, src, dst, srcSize, dstCapacity, limitedOutput, tableType, noDict, noDictIssue, acceleration);
}
}
}
@ -1110,11 +1231,12 @@ static int LZ4_compress_destSize_extState (LZ4_stream_t* state, const char* src,
if (targetDstSize >= LZ4_compressBound(*srcSizePtr)) { /* compression success is guaranteed */
return LZ4_compress_fast_extState(state, src, dst, *srcSizePtr, targetDstSize, 1);
} else {
if (*srcSizePtr < LZ4_64Klimit)
if (*srcSizePtr < LZ4_64Klimit) {
return LZ4_compress_destSize_generic(&state->internal_donotuse, src, dst, srcSizePtr, targetDstSize, byU16);
else
return LZ4_compress_destSize_generic(&state->internal_donotuse, src, dst, srcSizePtr, targetDstSize, sizeof(void*)==8 ? byU32 : byPtr);
}
} else {
tableType_t const tableType = ((sizeof(void*)==4) && ((uptrval)src > MAX_DISTANCE)) ? byPtr : byU32;
return LZ4_compress_destSize_generic(&state->internal_donotuse, src, dst, srcSizePtr, targetDstSize, tableType);
} }
}
@ -1154,9 +1276,12 @@ LZ4_stream_t* LZ4_createStream(void)
void LZ4_resetStream (LZ4_stream_t* LZ4_stream)
{
DEBUGLOG(5, "LZ4_resetStream %p", LZ4_stream);
DEBUGLOG(5, "LZ4_resetStream (ctx:%p)", LZ4_stream);
MEM_INIT(LZ4_stream, 0, sizeof(LZ4_stream_t));
LZ4_stream->internal_donotuse.tableType = clearedTable;
}
void LZ4_resetStream_fast(LZ4_stream_t* ctx) {
LZ4_prepareTable(&(ctx->internal_donotuse), 0, byU32);
}
int LZ4_freeStream (LZ4_stream_t* LZ4_stream)
@ -1172,47 +1297,66 @@ int LZ4_freeStream (LZ4_stream_t* LZ4_stream)
int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
{
LZ4_stream_t_internal* dict = &LZ4_dict->internal_donotuse;
const tableType_t tableType = byU32;
const BYTE* p = (const BYTE*)dictionary;
const BYTE* const dictEnd = p + dictSize;
const BYTE* base;
DEBUGLOG(4, "LZ4_loadDict %p", LZ4_dict);
DEBUGLOG(4, "LZ4_loadDict (%i bytes from %p into %p)", dictSize, dictionary, LZ4_dict);
if ((dict->initCheck)
|| (dict->tableType != byU32 && dict->tableType != clearedTable)
|| (dict->currentOffset > 1 GB)) /* Uninitialized structure, or reuse overflow */
LZ4_resetStream(LZ4_dict);
LZ4_prepareTable(dict, 0, tableType);
/* We always increment the offset by 64 KB, since, if the dict is longer,
* we truncate it to the last 64k, and if it's shorter, we still want to
* advance by a whole window length so we can provide the guarantee that
* there are only valid offsets in the window, which allows an optimization
* in LZ4_compress_fast_continue() where it uses noDictIssue even when the
* dictionary isn't a full 64k. */
if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
dict->currentOffset += 64 KB;
base = p - dict->currentOffset;
base = dictEnd - 64 KB - dict->currentOffset;
dict->dictionary = p;
dict->dictSize = (U32)(dictEnd - p);
dict->currentOffset += dict->dictSize;
dict->tableType = byU32;
dict->currentOffset += 64 KB;
dict->tableType = tableType;
if (dictSize < (int)HASH_UNIT) {
return 0;
}
while (p <= dictEnd-HASH_UNIT) {
LZ4_putPosition(p, dict->hashTable, byU32, base);
LZ4_putPosition(p, dict->hashTable, tableType, base);
p+=3;
}
return dict->dictSize;
}
void LZ4_attach_dictionary(LZ4_stream_t *working_stream, const LZ4_stream_t *dictionary_stream) {
if (dictionary_stream != NULL) {
/* If the current offset is zero, we will never look in the
* external dictionary context, since there is no value a table
* entry can take that indicate a miss. In that case, we need
* to bump the offset to something non-zero.
*/
if (working_stream->internal_donotuse.currentOffset == 0) {
working_stream->internal_donotuse.currentOffset = 64 KB;
}
working_stream->internal_donotuse.dictCtx = &(dictionary_stream->internal_donotuse);
} else {
working_stream->internal_donotuse.dictCtx = NULL;
}
}
static void LZ4_renormDictT(LZ4_stream_t_internal* LZ4_dict, const BYTE* src)
static void LZ4_renormDictT(LZ4_stream_t_internal* LZ4_dict, int nextSize)
{
if ((LZ4_dict->currentOffset > 0x80000000) ||
((uptrval)LZ4_dict->currentOffset > (uptrval)src)) { /* address space overflow */
if (LZ4_dict->currentOffset + nextSize > 0x80000000) { /* potential ptrdiff_t overflow (32-bits mode) */
/* rescale hash table */
U32 const delta = LZ4_dict->currentOffset - 64 KB;
const BYTE* dictEnd = LZ4_dict->dictionary + LZ4_dict->dictSize;
int i;
DEBUGLOG(4, "LZ4_renormDictT %p", LZ4_dict);
DEBUGLOG(4, "LZ4_renormDictT");
for (i=0; i<LZ4_HASH_SIZE_U32; i++) {
if (LZ4_dict->hashTable[i] < delta) LZ4_dict->hashTable[i]=0;
else LZ4_dict->hashTable[i] -= delta;
@ -1230,10 +1374,8 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream, const char* source, ch
LZ4_stream_t_internal* streamPtr = &LZ4_stream->internal_donotuse;
const BYTE* const dictEnd = streamPtr->dictionary + streamPtr->dictSize;
const BYTE* smallest = (const BYTE*) source;
if (streamPtr->initCheck) return 0; /* Uninitialized structure detected */
if ((streamPtr->dictSize>0) && (smallest>dictEnd)) smallest = dictEnd;
LZ4_renormDictT(streamPtr, smallest);
LZ4_renormDictT(streamPtr, inputSize); /* avoid index overflow */
if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
/* Check overlapping input/dictionary space */
@ -1248,7 +1390,6 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream, const char* source, ch
/* prefix mode : source data follows dictionary */
if (dictEnd == (const BYTE*)source) {
LZ4_prepareTable(streamPtr, inputSize, tableType, withPrefix64k);
if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset))
return LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, withPrefix64k, dictSmall, acceleration);
else
@ -1267,16 +1408,14 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream, const char* source, ch
if (inputSize > 4 KB) {
/* For compressing large blobs, it is faster to pay the setup
* cost to copy the dictionary's tables into the active context,
* so that the compression loop is only looking in one table.
* so that the compression loop is only looking into one table.
*/
memcpy(streamPtr, streamPtr->dictCtx, sizeof(LZ4_stream_t));
result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, usingExtDict, noDictIssue, acceleration);
} else {
LZ4_prepareTable(streamPtr, inputSize, tableType, usingDictCtx);
result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, usingDictCtx, noDictIssue, acceleration);
}
} else {
LZ4_prepareTable(streamPtr, inputSize, tableType, usingExtDict);
if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset)) {
result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, tableType, usingExtDict, dictSmall, acceleration);
} else {
@ -1290,25 +1429,22 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream, const char* source, ch
}
/* Hidden debug function, to force external dictionary mode */
int LZ4_compress_forceExtDict (LZ4_stream_t* LZ4_dict, const char* source, char* dest, int inputSize)
/* Hidden debug function, to force-test external dictionary mode */
int LZ4_compress_forceExtDict (LZ4_stream_t* LZ4_dict, const char* source, char* dest, int srcSize)
{
LZ4_stream_t_internal* streamPtr = &LZ4_dict->internal_donotuse;
int result;
const BYTE* const dictEnd = streamPtr->dictionary + streamPtr->dictSize;
const BYTE* smallest = dictEnd;
if (smallest > (const BYTE*) source) smallest = (const BYTE*) source;
LZ4_renormDictT(streamPtr, smallest);
LZ4_renormDictT(streamPtr, srcSize);
if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset)) {
result = LZ4_compress_generic(streamPtr, source, dest, inputSize, 0, notLimited, byU32, usingExtDict, dictSmall, 1);
result = LZ4_compress_generic(streamPtr, source, dest, srcSize, 0, notLimited, byU32, usingExtDict, dictSmall, 1);
} else {
result = LZ4_compress_generic(streamPtr, source, dest, inputSize, 0, notLimited, byU32, usingExtDict, noDictIssue, 1);
result = LZ4_compress_generic(streamPtr, source, dest, srcSize, 0, notLimited, byU32, usingExtDict, noDictIssue, 1);
}
streamPtr->dictionary = (const BYTE*)source;
streamPtr->dictSize = (U32)inputSize;
streamPtr->dictSize = (U32)srcSize;
return result;
}
@ -1533,19 +1669,25 @@ _output_error:
LZ4_FORCE_O2_GCC_PPC64LE
int LZ4_decompress_safe(const char* source, char* dest, int compressedSize, int maxDecompressedSize)
{
return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize, endOnInputSize, full, 0, noDict, (BYTE*)dest, NULL, 0);
return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize,
endOnInputSize, full, 0, noDict,
(BYTE*)dest, NULL, 0);
}
LZ4_FORCE_O2_GCC_PPC64LE
int LZ4_decompress_safe_partial(const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize)
{
return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize, endOnInputSize, partial, targetOutputSize, noDict, (BYTE*)dest, NULL, 0);
return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize,
endOnInputSize, partial, targetOutputSize,
noDict, (BYTE*)dest, NULL, 0);
}
LZ4_FORCE_O2_GCC_PPC64LE
int LZ4_decompress_fast(const char* source, char* dest, int originalSize)
{
return LZ4_decompress_generic(source, dest, 0, originalSize, endOnOutputSize, full, 0, withPrefix64k, (BYTE*)(dest - 64 KB), NULL, 64 KB);
return LZ4_decompress_generic(source, dest, 0, originalSize,
endOnOutputSize, full, 0, withPrefix64k,
(BYTE*)(dest - 64 KB), NULL, 64 KB);
}
@ -1687,21 +1829,45 @@ int LZ4_decompress_safe_forceExtDict(const char* source, char* dest, int compres
* Obsolete Functions
***************************************************/
/* obsolete compression functions */
int LZ4_compress_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize) { return LZ4_compress_default(source, dest, inputSize, maxOutputSize); }
int LZ4_compress(const char* source, char* dest, int inputSize) { return LZ4_compress_default(source, dest, inputSize, LZ4_compressBound(inputSize)); }
int LZ4_compress_limitedOutput_withState (void* state, const char* src, char* dst, int srcSize, int dstSize) { return LZ4_compress_fast_extState(state, src, dst, srcSize, dstSize, 1); }
int LZ4_compress_withState (void* state, const char* src, char* dst, int srcSize) { return LZ4_compress_fast_extState(state, src, dst, srcSize, LZ4_compressBound(srcSize), 1); }
int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_stream, const char* src, char* dst, int srcSize, int maxDstSize) { return LZ4_compress_fast_continue(LZ4_stream, src, dst, srcSize, maxDstSize, 1); }
int LZ4_compress_continue (LZ4_stream_t* LZ4_stream, const char* source, char* dest, int inputSize) { return LZ4_compress_fast_continue(LZ4_stream, source, dest, inputSize, LZ4_compressBound(inputSize), 1); }
int LZ4_compress_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize)
{
return LZ4_compress_default(source, dest, inputSize, maxOutputSize);
}
int LZ4_compress(const char* source, char* dest, int inputSize)
{
return LZ4_compress_default(source, dest, inputSize, LZ4_compressBound(inputSize));
}
int LZ4_compress_limitedOutput_withState (void* state, const char* src, char* dst, int srcSize, int dstSize)
{
return LZ4_compress_fast_extState(state, src, dst, srcSize, dstSize, 1);
}
int LZ4_compress_withState (void* state, const char* src, char* dst, int srcSize)
{
return LZ4_compress_fast_extState(state, src, dst, srcSize, LZ4_compressBound(srcSize), 1);
}
int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_stream, const char* src, char* dst, int srcSize, int dstCapacity)
{
return LZ4_compress_fast_continue(LZ4_stream, src, dst, srcSize, dstCapacity, 1);
}
int LZ4_compress_continue (LZ4_stream_t* LZ4_stream, const char* source, char* dest, int inputSize)
{
return LZ4_compress_fast_continue(LZ4_stream, source, dest, inputSize, LZ4_compressBound(inputSize), 1);
}
/*
These function names are deprecated and should no longer be used.
These decompression functions are deprecated and should no longer be used.
They are only provided here for compatibility with older user programs.
- LZ4_uncompress is totally equivalent to LZ4_decompress_fast
- LZ4_uncompress_unknownOutputSize is totally equivalent to LZ4_decompress_safe
*/
int LZ4_uncompress (const char* source, char* dest, int outputSize) { return LZ4_decompress_fast(source, dest, outputSize); }
int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize) { return LZ4_decompress_safe(source, dest, isize, maxOutputSize); }
int LZ4_uncompress (const char* source, char* dest, int outputSize)
{
return LZ4_decompress_fast(source, dest, outputSize);
}
int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize)
{
return LZ4_decompress_safe(source, dest, isize, maxOutputSize);
}
/* Obsolete Streaming functions */

71
lib/lz4.h
View File

@ -353,18 +353,69 @@ LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* src, char* dst, int or
* Their signatures may change.
**************************************/
/*!
LZ4_compress_fast_extState_noReset() :
A variant of LZ4_compress_fast_extState().
#ifdef LZ4_STATIC_LINKING_ONLY
Use the _noReset variant if LZ4_resetStream() was called on the state
buffer before being used for the first time (calls to both extState
functions leave the state in a safe state, so zeroing is not required
between calls). Otherwise, using the plain _extState requires LZ4 to
reinitialize the state internally for every call.
*/
LZ4LIB_API int LZ4_compress_fast_extState_noReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
/*! LZ4_resetStream_fast() :
* When an LZ4_stream_t is known to be in a internally coherent state,
* it can often be prepared for a new compression with almost no work, only
* sometimes falling back to the full, expensive reset that is always required
* when the stream is in an indeterminate state (i.e., the reset performed by
* LZ4_resetStream()).
*
* LZ4_streams are guaranteed to be in a valid state when:
* - returned from LZ4_createStream()
* - reset by LZ4_resetStream()
* - memset(stream, 0, sizeof(LZ4_stream_t))
* - the stream was in a valid state and was reset by LZ4_resetStream_fast()
* - the stream was in a valid state and was then used in any compression call
* that returned success
* - the stream was in an indeterminate state and was used in a compression
* call that fully reset the state (LZ4_compress_fast_extState()) and that
* returned success
*/
LZ4LIB_API void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
/*! LZ4_compress_fast_extState_fastReset() :
* A variant of LZ4_compress_fast_extState().
*
* Using this variant avoids an expensive initialization step. It is only safe
* to call if the state buffer is known to be correctly initialized already
* (see above comment on LZ4_resetStream_fast() for a definition of "correctly
* initialized"). From a high level, the difference is that this function
* initializes the provided state with a call to LZ4_resetStream_fast() while
* LZ4_compress_fast_extState() starts with a call to LZ4_resetStream().
*/
LZ4LIB_API int LZ4_compress_fast_extState_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
/*! LZ4_attach_dictionary() :
* This is an experimental API that allows for the efficient use of a
* static dictionary many times.
*
* Rather than re-loading the dictionary buffer into a working context before
* each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
* working LZ4_stream_t, this function introduces a no-copy setup mechanism,
* in which the working stream references the dictionary stream in-place.
*
* Several assumptions are made about the state of the dictionary stream.
* Currently, only streams which have been prepared by LZ4_loadDict() should
* be expected to work.
*
* Alternatively, the provided dictionary stream pointer may be NULL, in which
* case any existing dictionary stream is unset.
*
* If a dictionary is provided, it replaces any pre-existing stream history.
* The dictionary contents are the only history that can be referenced and
* logically immediately precede the data compressed in the first subsequent
* compression call.
*
* The dictionary will only remain attached to the working stream through the
* first compression call, at the end of which it is cleared. The dictionary
* stream (and source buffer) must remain in-place / accessible / unchanged
* through the completion of the first compression call on the stream.
*/
LZ4LIB_API void LZ4_attach_dictionary(LZ4_stream_t *working_stream, const LZ4_stream_t *dictionary_stream);
#endif
/*-************************************
* Private definitions

12
lib/lz4frame.c
View File

@ -74,6 +74,7 @@ You can contact the author at :
* Includes
**************************************/
#include "lz4frame_static.h"
#define LZ4_STATIC_LINKING_ONLY
#include "lz4.h"
#define LZ4_HC_STATIC_LINKING_ONLY
#include "lz4hc.h"
@ -530,13 +531,8 @@ static void LZ4F_applyCDict(void* ctx,
const LZ4F_CDict* cdict,
int level) {
if (level < LZ4HC_CLEVEL_MIN) {
LZ4_stream_t_internal* internal_ctx = &((LZ4_stream_t *)ctx)->internal_donotuse;
assert(!internal_ctx->initCheck);
/* Clear any local dictionary */
internal_ctx->dictionary = NULL;
internal_ctx->dictSize = 0;
/* Point to the dictionary context */
internal_ctx->dictCtx = cdict ? &(cdict->fastCtx->internal_donotuse) : NULL;
LZ4_resetStream_fast((LZ4_stream_t *)ctx);
LZ4_attach_dictionary((LZ4_stream_t *)ctx, cdict ? cdict->fastCtx : NULL);
} else {
if (cdict) {
memcpy(ctx, cdict->HCCtx, sizeof(*cdict->HCCtx));
@ -716,7 +712,7 @@ static int LZ4F_compressBlock(void* ctx, const char* src, char* dst, int srcSize
if (cdict) {
return LZ4_compress_fast_continue((LZ4_stream_t*)ctx, src, dst, srcSize, dstCapacity, acceleration);
} else {
return LZ4_compress_fast_extState_noReset(ctx, src, dst, srcSize, dstCapacity, acceleration);
return LZ4_compress_fast_extState_fastReset(ctx, src, dst, srcSize, dstCapacity, acceleration);
}
}

50
lib/lz4frame.h
View File

@ -93,8 +93,8 @@ extern "C" {
**************************************/
typedef size_t LZ4F_errorCode_t;
LZ4FLIB_API unsigned LZ4F_isError(LZ4F_errorCode_t code); /**< tells if a `LZ4F_errorCode_t` function result is an error code */
LZ4FLIB_API const char* LZ4F_getErrorName(LZ4F_errorCode_t code); /**< return error code string; useful for debugging */
LZ4FLIB_API unsigned LZ4F_isError(LZ4F_errorCode_t code); /**< tells when a function result is an error code */
LZ4FLIB_API const char* LZ4F_getErrorName(LZ4F_errorCode_t code); /**< return error code string; for debugging */
/*-************************************
@ -162,13 +162,13 @@ typedef LZ4F_contentChecksum_t contentChecksum_t;
* It's not required to set all fields, as long as the structure was initially memset() to zero.
* For all fields, 0 sets it to default value */
typedef struct {
LZ4F_blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB ; 0 == default */
LZ4F_blockMode_t blockMode; /* LZ4F_blockLinked, LZ4F_blockIndependent ; 0 == default */
LZ4F_contentChecksum_t contentChecksumFlag; /* if enabled, frame is terminated with a 32-bits checksum of decompressed data ; 0 == disabled (default) */
LZ4F_frameType_t frameType; /* read-only field : LZ4F_frame or LZ4F_skippableFrame */
unsigned long long contentSize; /* Size of uncompressed content ; 0 == unknown */
unsigned dictID; /* Dictionary ID, sent by the compressor to help decoder select the correct dictionary; 0 == no dictID provided */
LZ4F_blockChecksum_t blockChecksumFlag; /* if enabled, each block is followed by a checksum of block's compressed data ; 0 == disabled (default) */
LZ4F_blockSizeID_t blockSizeID; /* max64KB, max256KB, max1MB, max4MB; 0 == default */
LZ4F_blockMode_t blockMode; /* LZ4F_blockLinked, LZ4F_blockIndependent; 0 == default */
LZ4F_contentChecksum_t contentChecksumFlag; /* 1: frame terminated with 32-bit checksum of decompressed data; 0: disabled (default) */
LZ4F_frameType_t frameType; /* read-only field : LZ4F_frame or LZ4F_skippableFrame */
unsigned long long contentSize; /* Size of uncompressed content ; 0 == unknown */
unsigned dictID; /* Dictionary ID, sent by compressor to help decoder select correct dictionary; 0 == no dictID provided */
LZ4F_blockChecksum_t blockChecksumFlag; /* 1: each block followed by a checksum of block's compressed data; 0: disabled (default) */
} LZ4F_frameInfo_t;
/*! LZ4F_preferences_t :
@ -177,7 +177,7 @@ typedef struct {
* All reserved fields must be set to zero. */
typedef struct {
LZ4F_frameInfo_t frameInfo;
int compressionLevel; /* 0 == default (fast mode); values above LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values below 0 trigger "fast acceleration", proportional to value */
int compressionLevel; /* 0: default (fast mode); values > LZ4HC_CLEVEL_MAX count as LZ4HC_CLEVEL_MAX; values < 0 trigger "fast acceleration" */
unsigned autoFlush; /* 1 == always flush, to reduce usage of internal buffers */
unsigned reserved[4]; /* must be zero for forward compatibility */
} LZ4F_preferences_t;
@ -264,36 +264,44 @@ LZ4FLIB_API size_t LZ4F_compressBound(size_t srcSize, const LZ4F_preferences_t*
/*! LZ4F_compressUpdate() :
* LZ4F_compressUpdate() can be called repetitively to compress as much data as necessary.
* An important rule is that dstCapacity MUST be large enough to ensure operation success even in worst case situations.
* Important rule: dstCapacity MUST be large enough to ensure operation success even in worst case situations.
* This value is provided by LZ4F_compressBound().
* If this condition is not respected, LZ4F_compress() will fail (result is an errorCode).
* LZ4F_compressUpdate() doesn't guarantee error recovery. When an error occurs, compression context must be freed or resized.
* LZ4F_compressUpdate() doesn't guarantee error recovery.
* When an error occurs, compression context must be freed or resized.
* `cOptPtr` is optional : NULL can be provided, in which case all options are set to default.
* @return : number of bytes written into `dstBuffer` (it can be zero, meaning input data was just buffered).
* or an error code if it fails (which can be tested using LZ4F_isError())
*/
LZ4FLIB_API size_t LZ4F_compressUpdate(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const void* srcBuffer, size_t srcSize, const LZ4F_compressOptions_t* cOptPtr);
LZ4FLIB_API size_t LZ4F_compressUpdate(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const void* srcBuffer, size_t srcSize,
const LZ4F_compressOptions_t* cOptPtr);
/*! LZ4F_flush() :
* When data must be generated and sent immediately, without waiting for a block to be completely filled,
* it's possible to call LZ4_flush(). It will immediately compress any data buffered within cctx.
* `dstCapacity` must be large enough to ensure the operation will be successful.
* `cOptPtr` is optional : it's possible to provide NULL, all options will be set to default.
* @return : number of bytes written into dstBuffer (it can be zero, which means there was no data stored within cctx)
* @return : nb of bytes written into dstBuffer (can be zero, when there is no data stored within cctx)
* or an error code if it fails (which can be tested using LZ4F_isError())
*/
LZ4FLIB_API size_t LZ4F_flush(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const LZ4F_compressOptions_t* cOptPtr);
LZ4FLIB_API size_t LZ4F_flush(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const LZ4F_compressOptions_t* cOptPtr);
/*! LZ4F_compressEnd() :
* To properly finish an LZ4 frame, invoke LZ4F_compressEnd().
* It will flush whatever data remained within `cctx` (like LZ4_flush())
* and properly finalize the frame, with an endMark and a checksum.
* `cOptPtr` is optional : NULL can be provided, in which case all options will be set to default.
* @return : number of bytes written into dstBuffer (necessarily >= 4 (endMark), or 8 if optional frame checksum is enabled)
* @return : nb of bytes written into dstBuffer, necessarily >= 4 (endMark),
* or an error code if it fails (which can be tested using LZ4F_isError())
* A successful call to LZ4F_compressEnd() makes `cctx` available again for another compression task.
*/
LZ4FLIB_API size_t LZ4F_compressEnd(LZ4F_cctx* cctx, void* dstBuffer, size_t dstCapacity, const LZ4F_compressOptions_t* cOptPtr);
LZ4FLIB_API size_t LZ4F_compressEnd(LZ4F_cctx* cctx,
void* dstBuffer, size_t dstCapacity,
const LZ4F_compressOptions_t* cOptPtr);
/*-*********************************
@ -303,7 +311,7 @@ typedef struct LZ4F_dctx_s LZ4F_dctx; /* incomplete type */
typedef LZ4F_dctx* LZ4F_decompressionContext_t; /* compatibility with previous API versions */
typedef struct {
unsigned stableDst; /* pledge that at least 64KB+64Bytes of previously decompressed data remain unmodifed where it was decoded. This optimization skips storage operations in tmp buffers */
unsigned stableDst; /* pledges that last 64KB decompressed data will remain available unmodified. This optimization skips storage operations in tmp buffers. */
unsigned reserved[3]; /* must be set to zero for forward compatibility */
} LZ4F_decompressOptions_t;
@ -316,7 +324,7 @@ typedef struct {
* The function provides a pointer to an allocated and initialized LZ4F_dctx 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.
* Result of LZ4F_freeDecompressionContext() indicates current state of decompressionContext when being released.
* That is, it should be == 0 if decompression has been completed fully and correctly.
*/
LZ4FLIB_API LZ4F_errorCode_t LZ4F_createDecompressionContext(LZ4F_dctx** dctxPtr, unsigned version);
@ -357,8 +365,8 @@ LZ4FLIB_API size_t LZ4F_getFrameInfo(LZ4F_dctx* dctx,
* The function will read up to *srcSizePtr bytes from srcBuffer,
* and decompress data into dstBuffer, of capacity *dstSizePtr.
*
* The number of bytes consumed from srcBuffer will be written into *srcSizePtr (necessarily <= original value).
* The number of bytes decompressed into dstBuffer will be written into *dstSizePtr (necessarily <= original value).
* The nb of bytes consumed from srcBuffer will be written into *srcSizePtr (necessarily <= original value).
* The nb of bytes decompressed into dstBuffer will be written into *dstSizePtr (necessarily <= original value).
*
* The function does not necessarily read all input bytes, so always check value in *srcSizePtr.
* Unconsumed source data must be presented again in subsequent invocations.

16
lib/lz4hc.c
View File

@ -336,7 +336,7 @@ LZ4_FORCE_INLINE int LZ4HC_encodeSequence (
U32 const mlAdd = (matchLength>=19) ? ((matchLength-19) / 255) + 1 : 0;
U32 const cost = 1 + llAdd + ll + 2 + mlAdd;
if (start==NULL) start = *anchor; /* only works for single segment */
//g_debuglog_enable = (pos >= 2228) & (pos <= 2262);
/* g_debuglog_enable = (pos >= 2228) & (pos <= 2262); */
DEBUGLOG(6, "pos:%7u -- literals:%3u, match:%4i, offset:%5u, cost:%3u + %u",
pos,
(U32)(*ip - *anchor), matchLength, (U32)(*ip-match),
@ -852,16 +852,17 @@ int LZ4_resetStreamStateHC(void* state, char* inputBuffer)
LZ4HC_CCtx_internal *ctx = &((LZ4_streamHC_t*)state)->internal_donotuse;
if ((((size_t)state) & (sizeof(void*)-1)) != 0) return 1; /* Error : pointer is not aligned for pointer (32 or 64 bits) */
LZ4HC_init(ctx, (const BYTE*)inputBuffer);
ctx->inputBuffer = (BYTE*)inputBuffer;
ctx->inputBuffer = inputBuffer;
return 0;
}
void* LZ4_createHC (char* inputBuffer)
void* LZ4_createHC (const char* inputBuffer)
{
LZ4_streamHC_t* hc4 = (LZ4_streamHC_t*)ALLOC(sizeof(LZ4_streamHC_t));
if (hc4 == NULL) return NULL; /* not enough memory */
LZ4HC_init (&hc4->internal_donotuse, (const BYTE*)inputBuffer);
hc4->internal_donotuse.inputBuffer = (BYTE*)inputBuffer;
assert(sizeof(size_t) == sizeof(void*));
hc4->internal_donotuse.inputBuffer = (void*)(size_t)inputBuffer; /* ugly hack, circumvent -Wcast-qual */
return hc4;
}
@ -885,7 +886,7 @@ char* LZ4_slideInputBufferHC(void* LZ4HC_Data)
{
LZ4HC_CCtx_internal* const hc4 = &((LZ4_streamHC_t*)LZ4HC_Data)->internal_donotuse;
int const dictSize = LZ4_saveDictHC((LZ4_streamHC_t*)LZ4HC_Data, (char*)(hc4->inputBuffer), 64 KB);
return (char*)(hc4->inputBuffer + dictSize);
return (char*)(hc4->inputBuffer) + dictSize;
}
@ -1136,15 +1137,14 @@ static int LZ4HC_compress_optimal (
encode: /* cur, last_match_pos, best_mlen, best_off must be set */
assert(cur < LZ4_OPT_NUM);
assert(last_match_pos >= 1); /* == 1 when only one candidate */
DEBUGLOG(6, "reverse traversal, looking for shortest path")
DEBUGLOG(6, "last_match_pos = %i", last_match_pos);
DEBUGLOG(6, "reverse traversal, looking for shortest path (last_match_pos=%i)", last_match_pos);
{ int candidate_pos = cur;
int selected_matchLength = best_mlen;
int selected_offset = best_off;
while (1) { /* from end to beginning */
int const next_matchLength = opt[candidate_pos].mlen; /* can be 1, means literal */
int const next_offset = opt[candidate_pos].off;
DEBUGLOG(6, "pos %i: sequence length %i", candidate_pos, selected_matchLength);
DEBUGLOG(7, "pos %i: sequence length %i", candidate_pos, selected_matchLength);
opt[candidate_pos].mlen = selected_matchLength;
opt[candidate_pos].off = selected_offset;
selected_matchLength = next_matchLength;

8
lib/lz4hc.h
View File

@ -148,7 +148,7 @@ typedef struct
const uint8_t* end; /* next block here to continue on current prefix */
const uint8_t* base; /* All index relative to this position */
const uint8_t* dictBase; /* alternate base for extDict */
uint8_t* inputBuffer; /* deprecated */
void* inputBuffer; /* deprecated */
uint32_t dictLimit; /* below that point, need extDict */
uint32_t lowLimit; /* below that point, no more dict */
uint32_t nextToUpdate; /* index from which to continue dictionary update */
@ -164,7 +164,7 @@ typedef struct
const unsigned char* end; /* next block here to continue on current prefix */
const unsigned char* base; /* All index relative to this position */
const unsigned char* dictBase; /* alternate base for extDict */
unsigned char* inputBuffer; /* deprecated */
void* inputBuffer; /* deprecated */
unsigned int dictLimit; /* below that point, need extDict */
unsigned int lowLimit; /* below that point, no more dict */
unsigned int nextToUpdate; /* index from which to continue dictionary update */
@ -206,8 +206,8 @@ LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_co
LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize);
LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
/* Deprecated Streaming functions using older model; should no longer be used */
LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API void* LZ4_createHC (char* inputBuffer);
/* Deprecated Streaming functions; should no longer be used */
LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API void* LZ4_createHC (const char* inputBuffer);
LZ4_DEPRECATED("use LZ4_saveDictHC() instead") LZ4LIB_API char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
LZ4_DEPRECATED("use LZ4_freeStreamHC() instead") LZ4LIB_API int LZ4_freeHC (void* LZ4HC_Data);
LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);

9
programs/lz4io.c
View File

@ -94,9 +94,12 @@
static int g_displayLevel = 0; /* 0 : no display ; 1: errors ; 2 : + result + interaction + warnings ; 3 : + progression; 4 : + information */
#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
if (((clock_t)(g_time - clock()) > refreshRate) || (g_displayLevel>=4)) \
{ g_time = clock(); DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stderr); } }
if ( ((clock() - g_time) > refreshRate) \
|| (g_displayLevel>=4) ) { \
g_time = clock(); \
DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stderr); \
} }
static const clock_t refreshRate = CLOCKS_PER_SEC / 6;
static clock_t g_time = 0;

18
tests/Makefile
View File

@ -33,13 +33,14 @@ PRGDIR := ../programs
TESTDIR := versionsTest
PYTHON ?= python3
DEBUGFLAGS = -g -DLZ4_DEBUG=1
DEBUGLEVEL?= 1
DEBUGFLAGS = -g -DLZ4_DEBUG=$(DEBUGLEVEL)
CFLAGS ?= -O3 # can select custom optimization flags. For example : CFLAGS=-O2 make
CFLAGS += -Wall -Wextra -Wundef -Wcast-qual -Wcast-align -Wshadow \
-Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes \
-Wpointer-arith -Wstrict-aliasing=1
CFLAGS += $(DEBUGFLAGS) $(MOREFLAGS)
CPPFLAGS:= -I$(LZ4DIR) -I$(PRGDIR) -DXXH_NAMESPACE=LZ4_
CPPFLAGS+= -I$(LZ4DIR) -I$(PRGDIR) -DXXH_NAMESPACE=LZ4_
FLAGS = $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
@ -56,7 +57,7 @@ LZ4 := $(PRGDIR)/lz4$(EXT)
# Default test parameters
TEST_FILES := COPYING
FUZZER_TIME := -T3mn
FUZZER_TIME := -T90s
NB_LOOPS ?= -i1
@ -393,13 +394,12 @@ test-mem: lz4 datagen fuzzer frametest fullbench
./datagen -g16KB -s2 > ftmdg16K2
./datagen -g16KB -s3 > ftmdg16K3
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) --force --multiple ftmdg16K ftmdg16K2 ftmdg16K3
./datagen -g16MB > ftmdg16M
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -9 -B5D -f ftmdg16M ftmdg16K2
./datagen -g7MB > ftmdg7M
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -9 -B5D -f ftmdg7M ftmdg16K2
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -t ftmdg16K2
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -bi1 ftmdg16M
valgrind --leak-check=yes --error-exitcode=1 ./fullbench -i1 ftmdg16M ftmdg16K2
./datagen -g256MB > ftmdg256M
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -B4D -f -vq ftmdg256M $(VOID)
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -bi1 ftmdg7M
valgrind --leak-check=yes --error-exitcode=1 ./fullbench -i1 ftmdg7M ftmdg16K2
valgrind --leak-check=yes --error-exitcode=1 $(LZ4) -B4D -f -vq ftmdg7M $(VOID)
$(RM) ftm*
valgrind --leak-check=yes --error-exitcode=1 ./fuzzer -i64 -t1
valgrind --leak-check=yes --error-exitcode=1 ./frametest -i256

315
tests/fuzzer.c
View File

@ -34,15 +34,20 @@
#define LZ4_DISABLE_DEPRECATE_WARNINGS
/*-************************************
* Dependencies
**************************************/
#ifdef __unix__ /* must be included before platform.h for MAP_ANONYMOUS */
# include <sys/mman.h> /* mmap */
#endif
#include "platform.h" /* _CRT_SECURE_NO_WARNINGS */
#include "util.h" /* U32 */
#include <stdlib.h>
#include <stdio.h> /* fgets, sscanf */
#include <string.h> /* strcmp */
#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */
#define LZ4_STATIC_LINKING_ONLY
#define LZ4_HC_STATIC_LINKING_ONLY
#include "lz4hc.h"
#define XXH_STATIC_LINKING_ONLY
@ -240,6 +245,41 @@ _overflowError:
}
#ifdef __unix__ /* is expected to be triggered on linux+gcc */
static void* FUZ_createLowAddr(size_t size)
{
void* const lowBuff = mmap((void*)(0x1000), size,
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
DISPLAYLEVEL(2, "generating low buffer at address %p \n", lowBuff);
return lowBuff;
}
static void FUZ_freeLowAddr(void* buffer, size_t size)
{
if (munmap(buffer, size)) {
perror("fuzzer: freeing low address buffer");
abort();
}
}
#else
static void* FUZ_createLowAddr(size_t size)
{
return malloc(size);
}
static void FUZ_freeLowAddr(void* buffer, size_t size)
{
(void)size;
free(buffer);
}
#endif
/*! FUZ_findDiff() :
* find the first different byte between buff1 and buff2.
* presumes buff1 != buff2.
@ -252,7 +292,7 @@ static void FUZ_findDiff(const void* buff1, const void* buff2)
const BYTE* const b2 = (const BYTE*)buff2;
size_t u = 0;
while (b1[u]==b2[u]) u++;
DISPLAY("Wrong Byte at position %u \n", (unsigned)u);
DISPLAY("\nWrong Byte at position %u \n", (unsigned)u);
}
@ -266,6 +306,8 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
size_t const compressedBufferSize = LZ4_compressBound(FUZ_MAX_BLOCK_SIZE);
char* const compressedBuffer = (char*)malloc(compressedBufferSize);
char* const decodedBuffer = (char*)malloc(FUZ_MAX_DICT_SIZE + FUZ_MAX_BLOCK_SIZE);
size_t const labSize = 96 KB;
void* const lowAddrBuffer = FUZ_createLowAddr(labSize);
void* const stateLZ4 = malloc(LZ4_sizeofState());
void* const stateLZ4HC = malloc(LZ4_sizeofStateHC());
LZ4_stream_t LZ4dict;
@ -278,7 +320,14 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
# define FUZ_CHECKTEST(cond, ...) if (cond) { printf("Test %u : ", testNb); printf(__VA_ARGS__); \
printf(" (seed %u, cycle %u) \n", seed, cycleNb); goto _output_error; }
# define FUZ_DISPLAYTEST { testNb++; g_displayLevel>=4 ? printf("%2u\b\b", testNb), fflush(stdout) : 0; }
# define FUZ_DISPLAYTEST(...) { \
testNb++; \
if (g_displayLevel>=4) { \
printf("\r%4u - %2u ", cycleNb, testNb); \
printf(" " __VA_ARGS__); \
printf(" "); \
fflush(stdout); \
} }
/* init */
@ -302,24 +351,28 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
U32 testNb = 0;
U32 randState = FUZ_rand(&coreRandState) ^ PRIME3;
int const blockSize = (FUZ_rand(&randState) % (FUZ_MAX_BLOCK_SIZE-1)) + 1;
int const blockStart = FUZ_rand(&randState) % (COMPRESSIBLE_NOISE_LENGTH - blockSize);
int const blockStart = (FUZ_rand(&randState) % (COMPRESSIBLE_NOISE_LENGTH - blockSize - 1)) + 1;
int const dictSizeRand = FUZ_rand(&randState) % FUZ_MAX_DICT_SIZE;
int const dictSize = MIN(dictSizeRand, blockStart);
int const dictSize = MIN(dictSizeRand, blockStart - 1);
int const compressionLevel = FUZ_rand(&randState) % (LZ4HC_CLEVEL_MAX+1);
char* const block = ((char*)CNBuffer) + blockStart;
const char* block = ((char*)CNBuffer) + blockStart;
const char* dict = block - dictSize;
int compressedSize, HCcompressedSize;
int blockContinueCompressedSize;
U32 const crcOrig = XXH32(block, blockSize, 0);
U32 crcCheck;
int ret;
FUZ_displayUpdate(cycleNb);
/* Compression tests */
if ( ((FUZ_rand(&randState) & 63) == 2)
&& ((size_t)blockSize < labSize) ) {
memcpy(lowAddrBuffer, block, blockSize);
block = (const char*)lowAddrBuffer;
}
/* Test compression destSize */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_destSize()");
{ int srcSize = blockSize;
int const targetSize = srcSize * ((FUZ_rand(&randState) & 127)+1) >> 7;
char endCheck = FUZ_rand(&randState) & 255;
@ -334,7 +387,7 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
U32 const crcBase = XXH32(block, srcSize, 0);
char const canary = FUZ_rand(&randState) & 255;
FUZ_CHECKTEST((ret==0), "LZ4_compress_destSize() compression failed");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
compressedSize = ret;
decodedBuffer[srcSize] = canary;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, srcSize);
@ -350,7 +403,7 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
} }
/* Test compression HC destSize */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC_destSize()");
{ int srcSize = blockSize;
int const targetSize = srcSize * ((FUZ_rand(&randState) & 127)+1) >> 7;
char const endCheck = FUZ_rand(&randState) & 255;
@ -364,14 +417,12 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
FUZ_CHECKTEST(ret > targetSize, "LZ4_compress_HC_destSize() result larger than dst buffer !");
FUZ_CHECKTEST(compressedBuffer[targetSize] != endCheck, "LZ4_compress_HC_destSize() overwrite dst buffer !");
FUZ_CHECKTEST(srcSize > blockSize, "LZ4_compress_HC_destSize() fed more than src buffer !");
DISPLAYLEVEL(5, "LZ4_compress_HC_destSize(%i): destSize : %7i/%7i; content%7i/%7i ",
compressionLevel, ret, targetSize, srcSize, blockSize);
if (targetSize>0) {
/* check correctness */
U32 const crcBase = XXH32(block, srcSize, 0);
char const canary = FUZ_rand(&randState) & 255;
FUZ_CHECKTEST((ret==0), "LZ4_compress_HC_destSize() compression failed");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
compressedSize = ret;
decodedBuffer[srcSize] = canary;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, srcSize);
@ -387,61 +438,68 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
} }
/* Test compression HC */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC()");
ret = LZ4_compress_HC(block, compressedBuffer, blockSize, (int)compressedBufferSize, compressionLevel);
FUZ_CHECKTEST(ret==0, "LZ4_compress_HC() failed");
HCcompressedSize = ret;
/* Test compression HC using external state */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC_extStateHC()");
ret = LZ4_compress_HC_extStateHC(stateLZ4HC, block, compressedBuffer, blockSize, (int)compressedBufferSize, compressionLevel);
FUZ_CHECKTEST(ret==0, "LZ4_compress_HC_extStateHC() failed");
/* Test compression using external state */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_fast_extState()");
ret = LZ4_compress_fast_extState(stateLZ4, block, compressedBuffer, blockSize, (int)compressedBufferSize, 8);
FUZ_CHECKTEST(ret==0, "LZ4_compress_fast_extState() failed");
/* Test compression using fast reset external state*/
FUZ_DISPLAYTEST();
ret = LZ4_compress_fast_extState_fastReset(stateLZ4, block, compressedBuffer, blockSize, (int)compressedBufferSize, 8);
FUZ_CHECKTEST(ret==0, "LZ4_compress_fast_extState_fastReset() failed");
/* Test compression */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_default()");
ret = LZ4_compress_default(block, compressedBuffer, blockSize, (int)compressedBufferSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress_default() failed");
compressedSize = ret;
/* Decompression tests */
/* Test decoding with output size being exactly what's necessary => must work */
FUZ_DISPLAYTEST;
/* Test decoding with output size exactly correct => must work */
FUZ_DISPLAYTEST("LZ4_decompress_fast() with exact output buffer");
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_fast failed despite correct space");
FUZ_CHECKTEST(ret!=compressedSize, "LZ4_decompress_fast failed : did not fully read compressed data");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast corrupted decoded data");
}
/* Test decoding with one byte missing => must fail */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("LZ4_decompress_fast() with output buffer 1-byte too short");
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize-1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast should have failed, due to Output Size being too small");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast overrun specified output buffer");
/* Test decoding with one byte too much => must fail */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize+1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast should have failed, due to Output Size being too large");
/* Test decoding with output size exactly what's necessary => must work */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe failed despite sufficient space");
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
}
// Test decoding with more than enough output size => must work
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
decodedBuffer[blockSize+1] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize+1);
@ -449,18 +507,19 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe did not regenerate original data");
//FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe wrote more than (unknown) target size"); // well, is that an issue ?
FUZ_CHECKTEST(decodedBuffer[blockSize+1], "LZ4_decompress_safe overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
}
// Test decoding with output size being one byte too short => must fail
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize-1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to Output Size being one byte too short");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe overrun specified output buffer size");
// Test decoding with output size being 10 bytes too short => must fail
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
if (blockSize>10) {
decodedBuffer[blockSize-10] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize-10);
@ -469,51 +528,51 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
}
// Test decoding with input size being one byte too short => must fail
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize-1, blockSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to input size being one byte too short (blockSize=%i, ret=%i, compressedSize=%i)", blockSize, ret, compressedSize);
// Test decoding with input size being one byte too large => must fail
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize+1, blockSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to input size being too large");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe overrun specified output buffer size");
// Test partial decoding with target output size being max/2 => must work
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
ret = LZ4_decompress_safe_partial(compressedBuffer, decodedBuffer, compressedSize, blockSize/2, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe_partial failed despite sufficient space");
// Test partial decoding with target output size being just below max => must work
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
ret = LZ4_decompress_safe_partial(compressedBuffer, decodedBuffer, compressedSize, blockSize-3, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe_partial failed despite sufficient space");
/* Test Compression with limited output size */
/* Test compression with output size being exactly what's necessary (should work) */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_default() with output buffer just the right size");
ret = LZ4_compress_default(block, compressedBuffer, blockSize, compressedSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress_default() failed despite sufficient space");
/* Test compression with output size being exactly what's necessary and external state (should work) */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_fast_extState() with output buffer just the right size");
ret = LZ4_compress_fast_extState(stateLZ4, block, compressedBuffer, blockSize, compressedSize, 1);
FUZ_CHECKTEST(ret==0, "LZ4_compress_fast_extState() failed despite sufficient space");
/* Test HC compression with output size being exactly what's necessary (should work) */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC() with output buffer just the right size");
ret = LZ4_compress_HC(block, compressedBuffer, blockSize, HCcompressedSize, compressionLevel);
FUZ_CHECKTEST(ret==0, "LZ4_compress_HC() failed despite sufficient space");
/* Test HC compression with output size being exactly what's necessary (should work) */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC_extStateHC() with output buffer just the right size");
ret = LZ4_compress_HC_extStateHC(stateLZ4HC, block, compressedBuffer, blockSize, HCcompressedSize, compressionLevel);
FUZ_CHECKTEST(ret==0, "LZ4_compress_HC_extStateHC() failed despite sufficient space");
/* Test compression with missing bytes into output buffer => must fail */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_default() with output buffer a bit too short");
{ int missingBytes = (FUZ_rand(&randState) % 0x3F) + 1;
if (missingBytes >= compressedSize) missingBytes = compressedSize-1;
missingBytes += !missingBytes; /* avoid special case missingBytes==0 */
@ -524,7 +583,7 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
}
/* Test HC compression with missing bytes into output buffer => must fail */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_HC() with output buffer a bit too short");
{ int missingBytes = (FUZ_rand(&randState) % 0x3F) + 1;
if (missingBytes >= HCcompressedSize) missingBytes = HCcompressedSize-1;
missingBytes += !missingBytes; /* avoid special case missingBytes==0 */
@ -540,7 +599,7 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
/*-******************/
/* Compress using dictionary */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_fast_continue() with dictionary of size %i", dictSize);
{ LZ4_stream_t LZ4_stream;
LZ4_resetStream(&LZ4_stream);
LZ4_compress_fast_continue (&LZ4_stream, dict, compressedBuffer, dictSize, (int)compressedBufferSize, 1); /* Just to fill hash tables */
@ -549,75 +608,169 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
}
/* Decompress with dictionary as prefix */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_decompress_fast_usingDict() with dictionary as prefix");
memcpy(decodedBuffer, dict, dictSize);
ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer+dictSize, blockSize, decodedBuffer, dictSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_usingDict did not read all compressed block input");
crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
if (crcCheck!=crcOrig) {
int i=0;
while (block[i]==decodedBuffer[i]) i++;
printf("Wrong Byte at position %i/%i\n", i, blockSize);
{ U32 const crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize);
}
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize);
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_decompress_safe_usingDict()");
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer+dictSize, blockContinueCompressedSize, blockSize, decodedBuffer, dictSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_usingDict did not regenerate original data");
crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
}
/* Compress using External dictionary */
FUZ_DISPLAYTEST;
dict -= (FUZ_rand(&randState) & 0xF) + 1; /* Separation, so it is an ExtDict */
FUZ_DISPLAYTEST("test LZ4_compress_fast_continue(), with non-contiguous dictionary");
dict -= (FUZ_rand(&randState) & 0xF) + 1; /* create space, so now dictionary is an ExtDict */
if (dict < (char*)CNBuffer) dict = (char*)CNBuffer;
LZ4_loadDict(&LZ4dict, dict, dictSize);
blockContinueCompressedSize = LZ4_compress_fast_continue(&LZ4dict, block, compressedBuffer, blockSize, (int)compressedBufferSize, 1);
FUZ_CHECKTEST(blockContinueCompressedSize==0, "LZ4_compress_fast_continue failed");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_fast_continue() with dictionary but with an output buffer too short by one byte");
LZ4_loadDict(&LZ4dict, dict, dictSize);
ret = LZ4_compress_fast_continue(&LZ4dict, block, compressedBuffer, blockSize, blockContinueCompressedSize-1, 1);
FUZ_CHECKTEST(ret>0, "LZ4_compress_fast_continue using ExtDict should fail : one missing byte for output buffer : %i written, %i buffer", ret, blockContinueCompressedSize);
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_compress_fast_continue() with dictionary loaded with LZ4_loadDict()");
DISPLAYLEVEL(5, " compress %i bytes from buffer(%p) into dst(%p) using dict(%p) of size %i \n", blockSize, block, decodedBuffer, dict, dictSize);
LZ4_loadDict(&LZ4dict, dict, dictSize);
ret = LZ4_compress_fast_continue(&LZ4dict, block, compressedBuffer, blockSize, blockContinueCompressedSize, 1);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_limitedOutput_compressed size is different (%i != %i)", ret, blockContinueCompressedSize);
FUZ_CHECKTEST(ret<=0, "LZ4_compress_fast_continue should work : enough size available within output buffer");
/* Decompress with dictionary as external */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST("test LZ4_decompress_fast_usingDict() with dictionary as extDict");
DISPLAYLEVEL(5, " decoding %i bytes from buffer(%p) using dict(%p) of size %i \n", blockSize, decodedBuffer, dict, dictSize);
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_usingDict did not read all compressed block input");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_fast_usingDict overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize);
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize);
}
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_usingDict did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe_usingDict overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
}
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast_usingDict should have failed : wrong original size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast_usingDict overrun specified output buffer size");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_usingDict should have failed : not enough output size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe_usingDict overrun specified output buffer size");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
{ U32 const missingBytes = (FUZ_rand(&randState) & 0xF) + 2;
if ((U32)blockSize > missingBytes) {
decodedBuffer[blockSize-missingBytes] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-missingBytes, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_usingDict should have failed : output buffer too small (-%u byte)", missingBytes);
FUZ_CHECKTEST(decodedBuffer[blockSize-missingBytes], "LZ4_decompress_safe_usingDict overrun specified output buffer size (-%u byte) (blockSize=%i)", missingBytes, blockSize);
} }
/* Compress using external dictionary stream */
{
LZ4_stream_t LZ4_stream;
int expectedSize;
U32 expectedCrc;
FUZ_DISPLAYTEST("LZ4_compress_fast_continue() after LZ4_loadDict()");
LZ4_loadDict(&LZ4dict, dict, dictSize);
expectedSize = LZ4_compress_fast_continue(&LZ4dict, block, compressedBuffer, blockSize, (int)compressedBufferSize, 1);
FUZ_CHECKTEST(expectedSize<=0, "LZ4_compress_fast_continue reference compression for extDictCtx should have succeeded");
expectedCrc = XXH32(compressedBuffer, expectedSize, 0);
FUZ_DISPLAYTEST("LZ4_compress_fast_continue() after LZ4_attach_dictionary()");
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_resetStream(&LZ4_stream);
LZ4_attach_dictionary(&LZ4_stream, &LZ4dict);
blockContinueCompressedSize = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, (int)compressedBufferSize, 1);
FUZ_CHECKTEST(blockContinueCompressedSize==0, "LZ4_compress_fast_continue using extDictCtx failed");
/* In the future, it might be desirable to let extDictCtx mode's
* output diverge from the output generated by regular extDict mode.
* Until that time, this comparison serves as a good regression
* test.
*/
FUZ_CHECKTEST(blockContinueCompressedSize != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output (%d expected vs %d actual)", expectedSize, blockContinueCompressedSize);
FUZ_CHECKTEST(XXH32(compressedBuffer, blockContinueCompressedSize, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output");
FUZ_DISPLAYTEST("LZ4_compress_fast_continue() after LZ4_attach_dictionary(), but output buffer is 1 byte too short");
LZ4_resetStream(&LZ4_stream);
LZ4_attach_dictionary(&LZ4_stream, &LZ4dict);
ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize-1, 1);
FUZ_CHECKTEST(ret>0, "LZ4_compress_fast_continue using extDictCtx should fail : one missing byte for output buffer : %i written, %i buffer", ret, blockContinueCompressedSize);
FUZ_DISPLAYTEST();
LZ4_resetStream(&LZ4_stream);
LZ4_attach_dictionary(&LZ4_stream, &LZ4dict);
ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize, 1);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_limitedOutput_compressed size is different (%i != %i)", ret, blockContinueCompressedSize);
FUZ_CHECKTEST(ret<=0, "LZ4_compress_fast_continue using extDictCtx should work : enough size available within output buffer");
FUZ_CHECKTEST(ret != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output");
FUZ_CHECKTEST(XXH32(compressedBuffer, ret, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output");
FUZ_DISPLAYTEST();
LZ4_resetStream_fast(&LZ4_stream);
LZ4_attach_dictionary(&LZ4_stream, &LZ4dict);
ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize, 1);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_limitedOutput_compressed size is different (%i != %i)", ret, blockContinueCompressedSize);
FUZ_CHECKTEST(ret<=0, "LZ4_compress_fast_continue using extDictCtx with re-used context should work : enough size available within output buffer");
FUZ_CHECKTEST(ret != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output");
FUZ_CHECKTEST(XXH32(compressedBuffer, ret, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output");
}
/* Decompress with dictionary as external */
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_usingDict did not read all compressed block input");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_fast_usingDict overrun specified output buffer size");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize);
}
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_usingDict did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe_usingDict overrun specified output buffer size");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
}
FUZ_DISPLAYTEST();
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast_usingDict should have failed : wrong original size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast_usingDict overrun specified output buffer size");
FUZ_DISPLAYTEST();
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_usingDict should have failed : not enough output size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe_usingDict overrun specified output buffer size");
FUZ_DISPLAYTEST();
{ U32 const missingBytes = (FUZ_rand(&randState) & 0xF) + 2;
if ((U32)blockSize > missingBytes) {
decodedBuffer[blockSize-missingBytes] = 0;
@ -627,7 +780,7 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
} }
/* Compress HC using External dictionary */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
dict -= (FUZ_rand(&randState) & 7); /* even bigger separation */
if (dict < (char*)CNBuffer) dict = (char*)CNBuffer;
LZ4_resetStreamHC (&LZ4dictHC, compressionLevel);
@ -636,32 +789,32 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
blockContinueCompressedSize = LZ4_compress_HC_continue(&LZ4dictHC, block, compressedBuffer, blockSize, (int)compressedBufferSize);
FUZ_CHECKTEST(blockContinueCompressedSize==0, "LZ4_compress_HC_continue failed");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
LZ4_loadDictHC(&LZ4dictHC, dict, dictSize);
ret = LZ4_compress_HC_continue(&LZ4dictHC, block, compressedBuffer, blockSize, blockContinueCompressedSize-1);
FUZ_CHECKTEST(ret>0, "LZ4_compress_HC_continue using ExtDict should fail : one missing byte for output buffer (%i != %i)", ret, blockContinueCompressedSize);
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
LZ4_loadDictHC(&LZ4dictHC, dict, dictSize);
ret = LZ4_compress_HC_continue(&LZ4dictHC, block, compressedBuffer, blockSize, blockContinueCompressedSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_HC_continue size is different (%i != %i)", ret, blockContinueCompressedSize);
FUZ_CHECKTEST(ret<=0, "LZ4_compress_HC_continue should work : enough size available within output buffer");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_usingDict did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe_usingDict overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
if (crcCheck!=crcOrig)
FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
{ U32 const crcCheck = XXH32(decodedBuffer, blockSize, 0);
if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data");
}
/* Compress HC continue destSize */
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
{ int const availableSpace = (FUZ_rand(&randState) % blockSize) + 5;
int consumedSize = blockSize;
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
LZ4_resetStreamHC (&LZ4dictHC, compressionLevel);
LZ4_loadDictHC(&LZ4dictHC, dict, dictSize);
blockContinueCompressedSize = LZ4_compress_HC_continue_destSize(&LZ4dictHC, block, compressedBuffer, &consumedSize, availableSpace);
@ -670,15 +823,14 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c
FUZ_CHECKTEST(blockContinueCompressedSize > availableSpace, "LZ4_compress_HC_continue_destSize write overflow");
FUZ_CHECKTEST(consumedSize > blockSize, "LZ4_compress_HC_continue_destSize read overflow");
FUZ_DISPLAYTEST;
FUZ_DISPLAYTEST();
decodedBuffer[consumedSize] = 0;
ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, consumedSize, dict, dictSize);
FUZ_CHECKTEST(ret!=consumedSize, "LZ4_decompress_safe_usingDict did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[consumedSize], "LZ4_decompress_safe_usingDict overrun specified output buffer size")
{ U32 const crcSrc = XXH32(block, consumedSize, 0);
U32 const crcDst = XXH32(decodedBuffer, consumedSize, 0);
if (crcSrc!=crcDst)
FUZ_findDiff(block, decodedBuffer);
if (crcSrc!=crcDst) FUZ_findDiff(block, decodedBuffer);
FUZ_CHECKTEST(crcSrc!=crcDst, "LZ4_decompress_safe_usingDict corrupted decoded data");
}
}
@ -705,6 +857,7 @@ _exit:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
FUZ_freeLowAddr(lowAddrBuffer, labSize);
free(stateLZ4);
free(stateLZ4HC);
return result;
@ -1074,13 +1227,13 @@ int main(int argc, const char** argv)
return FUZ_usage(programName);
case 'v': /* verbose mode */
argument++;
g_displayLevel++;
argument++;
break;
case 'p': /* pause at the end */
argument++;
use_pause=1;
argument++;
break;
case 'i':

173
visual/VS2017/datagen/datagen.vcxproj Normal file
View File

@ -0,0 +1,173 @@
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//
#include "lz4.h" /* LZ4_VERSION_STRING */
#define APSTUDIO_READONLY_SYMBOLS
#include "verrsrc.h"
#undef APSTUDIO_READONLY_SYMBOLS
#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
LANGUAGE 9, 1
/////////////////////////////////////////////////////////////////////////////
//
// Version
//
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FILEVERSION LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
PRODUCTVERSION LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
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FILEFLAGS VS_FF_DEBUG
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FILEFLAGS 0x0L
#endif
FILEOS VOS_NT_WINDOWS32
FILETYPE VFT_DLL
FILESUBTYPE VFT2_UNKNOWN
BEGIN
BLOCK "StringFileInfo"
BEGIN
BLOCK "040904B0"
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VALUE "FileDescription", "Extremely fast compression"
VALUE "FileVersion", LZ4_VERSION_STRING
VALUE "InternalName", "lz4.dll"
VALUE "LegalCopyright", "Copyright (C) 2013-2016, Yann Collet"
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VALUE "ProductName", "LZ4"
VALUE "ProductVersion", LZ4_VERSION_STRING
END
END
BLOCK "VarFileInfo"
BEGIN
VALUE "Translation", 0x0409, 1200
END
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98
visual/VS2017/lz4.sln Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
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