Rizin
unix-like reverse engineering framework and cli tools
lz4.h File Reference
#include <stddef.h>

Go to the source code of this file.

Classes

struct  LZ4_stream_t_internal
 
struct  LZ4_streamDecode_t_internal
 
union  LZ4_stream_u
 
union  LZ4_streamDecode_u
 

Macros

#define LZ4_H_2983827168210
 
#define LZ4LIB_VISIBILITY
 
#define LZ4LIB_API   LZ4LIB_VISIBILITY
 
#define LZ4_VERSION_MAJOR   1 /* for breaking interface changes */
 
#define LZ4_VERSION_MINOR   9 /* for new (non-breaking) interface capabilities */
 
#define LZ4_VERSION_RELEASE   3 /* for tweaks, bug-fixes, or development */
 
#define LZ4_VERSION_NUMBER   (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
 
#define LZ4_LIB_VERSION   LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
 
#define LZ4_QUOTE(str)   #str
 
#define LZ4_EXPAND_AND_QUOTE(str)   LZ4_QUOTE(str)
 
#define LZ4_VERSION_STRING   LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
 
#define LZ4_MEMORY_USAGE   14
 
#define LZ4_MAX_INPUT_SIZE   0x7E000000 /* 2 113 929 216 bytes */
 
#define LZ4_COMPRESSBOUND(isize)   ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
 
#define LZ4_DECODER_RING_BUFFER_SIZE(maxBlockSize)   (65536 + 14 + (maxBlockSize)) /* for static allocation; maxBlockSize presumed valid */
 
#define LZ4_H_98237428734687
 
#define LZ4_HASHLOG   (LZ4_MEMORY_USAGE-2)
 
#define LZ4_HASHTABLESIZE   (1 << LZ4_MEMORY_USAGE)
 
#define LZ4_HASH_SIZE_U32   (1 << LZ4_HASHLOG) /* required as macro for static allocation */
 
#define LZ4_STREAMSIZE   16416 /* static size, for inter-version compatibility */
 
#define LZ4_STREAMSIZE_VOIDP   (LZ4_STREAMSIZE / sizeof(void*))
 
#define LZ4_STREAMDECODESIZE_U64   (4 + ((sizeof(void*)==16) ? 2 : 0) /*AS-400*/ )
 
#define LZ4_STREAMDECODESIZE   (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
 
#define LZ4_DEPRECATED(message)   /* disabled */
 

Typedefs

typedef union LZ4_stream_u LZ4_stream_t
 
typedef union LZ4_streamDecode_u LZ4_streamDecode_t
 
typedef signed char LZ4_i8
 
typedef unsigned char LZ4_byte
 
typedef unsigned short LZ4_u16
 
typedef unsigned int LZ4_u32
 
typedef struct LZ4_stream_t_internal LZ4_stream_t_internal
 

Functions

LZ4LIB_API int LZ4_versionNumber (void)
 
LZ4LIB_API const char * LZ4_versionString (void)
 
LZ4LIB_API int LZ4_compress_default (const char *src, char *dst, int srcSize, int dstCapacity)
 
LZ4LIB_API int LZ4_decompress_safe (const char *src, char *dst, int compressedSize, int dstCapacity)
 
LZ4LIB_API int LZ4_compressBound (int inputSize)
 
LZ4LIB_API int LZ4_compress_fast (const char *src, char *dst, int srcSize, int dstCapacity, int acceleration)
 
LZ4LIB_API int LZ4_sizeofState (void)
 
LZ4LIB_API int LZ4_compress_fast_extState (void *state, const char *src, char *dst, int srcSize, int dstCapacity, int acceleration)
 
LZ4LIB_API int LZ4_compress_destSize (const char *src, char *dst, int *srcSizePtr, int targetDstSize)
 
LZ4LIB_API int LZ4_decompress_safe_partial (const char *src, char *dst, int srcSize, int targetOutputSize, int dstCapacity)
 
LZ4LIB_API LZ4_stream_tLZ4_createStream (void)
 
LZ4LIB_API int LZ4_freeStream (LZ4_stream_t *streamPtr)
 
LZ4LIB_API void LZ4_resetStream_fast (LZ4_stream_t *streamPtr)
 
LZ4LIB_API int LZ4_loadDict (LZ4_stream_t *streamPtr, const char *dictionary, int dictSize)
 
LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t *streamPtr, const char *src, char *dst, int srcSize, int dstCapacity, int acceleration)
 
LZ4LIB_API int LZ4_saveDict (LZ4_stream_t *streamPtr, char *safeBuffer, int maxDictSize)
 
LZ4LIB_API LZ4_streamDecode_tLZ4_createStreamDecode (void)
 
LZ4LIB_API int LZ4_freeStreamDecode (LZ4_streamDecode_t *LZ4_stream)
 
LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t *LZ4_streamDecode, const char *dictionary, int dictSize)
 
LZ4LIB_API int LZ4_decoderRingBufferSize (int maxBlockSize)
 
LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t *LZ4_streamDecode, const char *src, char *dst, int srcSize, int dstCapacity)
 
LZ4LIB_API int LZ4_decompress_safe_usingDict (const char *src, char *dst, int srcSize, int dstCapcity, const char *dictStart, int dictSize)
 
LZ4LIB_API LZ4_stream_tLZ4_initStream (void *buffer, size_t size)
 
 LZ4_DEPRECATED ("use LZ4_compress_default() instead") LZ4LIB_API int LZ4_compress(const char *src
 
 LZ4_DEPRECATED ("use LZ4_compress_fast_extState() instead") LZ4LIB_API int LZ4_compress_withState(void *state
 
 LZ4_DEPRECATED ("use LZ4_compress_fast_continue() instead") LZ4LIB_API int LZ4_compress_continue(LZ4_stream_t *LZ4_streamPtr
 
 LZ4_DEPRECATED ("use LZ4_decompress_fast() instead") LZ4LIB_API int LZ4_uncompress(const char *source
 
 LZ4_DEPRECATED ("use LZ4_decompress_safe() instead") LZ4LIB_API int LZ4_uncompress_unknownOutputSize(const char *source
 
 LZ4_DEPRECATED ("Use LZ4_createStream() instead") LZ4LIB_API void *LZ4_create(char *inputBuffer)
 
 LZ4_DEPRECATED ("Use LZ4_resetStream() instead") LZ4LIB_API int LZ4_resetStreamState(void *state
 
 LZ4_DEPRECATED ("Use LZ4_saveDict() instead") LZ4LIB_API char *LZ4_slideInputBuffer(void *state)
 
 LZ4_DEPRECATED ("use LZ4_decompress_safe_usingDict() instead") LZ4LIB_API int LZ4_decompress_safe_withPrefix64k(const char *src
 
 LZ4_DEPRECATED ("use LZ4_decompress_fast_usingDict() instead") LZ4LIB_API int LZ4_decompress_fast_withPrefix64k(const char *src
 
LZ4LIB_API int LZ4_decompress_fast (const char *src, char *dst, int originalSize)
 
LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t *LZ4_streamDecode, const char *src, char *dst, int originalSize)
 
LZ4LIB_API int LZ4_decompress_fast_usingDict (const char *src, char *dst, int originalSize, const char *dictStart, int dictSize)
 
LZ4LIB_API void LZ4_resetStream (LZ4_stream_t *streamPtr)
 

Variables

char * dest
 
char int srcSize
 
char int int maxOutputSize
 
const char * source
 
const char char int inputSize
 
char int outputSize
 
char int isize
 
char * inputBuffer
 
char * dst
 
char int compressedSize
 
char int int maxDstSize
 
char int originalSize
 

Macro Definition Documentation

◆ LZ4_COMPRESSBOUND

#define LZ4_COMPRESSBOUND (   isize)    ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)

Definition at line 171 of file lz4.h.

◆ LZ4_DECODER_RING_BUFFER_SIZE

#define LZ4_DECODER_RING_BUFFER_SIZE (   maxBlockSize)    (65536 + 14 + (maxBlockSize)) /* for static allocation; maxBlockSize presumed valid */

Definition at line 382 of file lz4.h.

◆ LZ4_DEPRECATED

#define LZ4_DEPRECATED (   message)    /* disabled */

Deprecation warnings

Deprecated functions make the compiler generate a warning when invoked. This is meant to invite users to update their source code. Should deprecation warnings be a problem, it is generally possible to disable them, typically with -Wno-deprecated-declarations for gcc or _CRT_SECURE_NO_WARNINGS in Visual.

Another method is to define LZ4_DISABLE_DEPRECATE_WARNINGS before including the header file.

Definition at line 692 of file lz4.h.

◆ LZ4_EXPAND_AND_QUOTE

#define LZ4_EXPAND_AND_QUOTE (   str)    LZ4_QUOTE(str)

Definition at line 109 of file lz4.h.

◆ LZ4_H_2983827168210

#define LZ4_H_2983827168210

Definition at line 40 of file lz4.h.

◆ LZ4_H_98237428734687

#define LZ4_H_98237428734687

Definition at line 569 of file lz4.h.

◆ LZ4_HASH_SIZE_U32

#define LZ4_HASH_SIZE_U32   (1 << LZ4_HASHLOG) /* required as macro for static allocation */

Definition at line 580 of file lz4.h.

◆ LZ4_HASHLOG

#define LZ4_HASHLOG   (LZ4_MEMORY_USAGE-2)

Definition at line 578 of file lz4.h.

◆ LZ4_HASHTABLESIZE

#define LZ4_HASHTABLESIZE   (1 << LZ4_MEMORY_USAGE)

Definition at line 579 of file lz4.h.

◆ LZ4_LIB_VERSION

Definition at line 107 of file lz4.h.

◆ LZ4_MAX_INPUT_SIZE

#define LZ4_MAX_INPUT_SIZE   0x7E000000 /* 2 113 929 216 bytes */

Definition at line 170 of file lz4.h.

◆ LZ4_MEMORY_USAGE

#define LZ4_MEMORY_USAGE   14

LZ4_MEMORY_USAGE : Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) Increasing memory usage improves compression ratio. Reduced memory usage may improve speed, thanks to better cache locality. Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache

Definition at line 127 of file lz4.h.

◆ LZ4_QUOTE

#define LZ4_QUOTE (   str)    #str

Definition at line 108 of file lz4.h.

◆ LZ4_STREAMDECODESIZE

#define LZ4_STREAMDECODESIZE   (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))

Definition at line 656 of file lz4.h.

◆ LZ4_STREAMDECODESIZE_U64

#define LZ4_STREAMDECODESIZE_U64   (4 + ((sizeof(void*)==16) ? 2 : 0) /*AS-400*/ )

LZ4_streamDecode_t : information structure to track an LZ4 stream during decompression. init this structure using LZ4_setStreamDecode() before first use. note : only use in association with static linking ! this definition is not API/ABI safe, and may change in a future version !

Definition at line 655 of file lz4.h.

◆ LZ4_STREAMSIZE

#define LZ4_STREAMSIZE   16416 /* static size, for inter-version compatibility */

LZ4_stream_t : Do not use below internal definitions directly ! Declare or allocate an LZ4_stream_t instead. LZ4_stream_t can also be created using LZ4_createStream(), which is recommended. The structure definition can be convenient for static allocation (on stack, or as part of larger structure). Init this structure with LZ4_initStream() before first use. note : only use this definition in association with static linking ! this definition is not API/ABI safe, and may change in future versions.

Definition at line 623 of file lz4.h.

◆ LZ4_STREAMSIZE_VOIDP

#define LZ4_STREAMSIZE_VOIDP   (LZ4_STREAMSIZE / sizeof(void*))

Definition at line 624 of file lz4.h.

◆ LZ4_VERSION_MAJOR

#define LZ4_VERSION_MAJOR   1 /* for breaking interface changes */

Definition at line 101 of file lz4.h.

◆ LZ4_VERSION_MINOR

#define LZ4_VERSION_MINOR   9 /* for new (non-breaking) interface capabilities */

Definition at line 102 of file lz4.h.

◆ LZ4_VERSION_NUMBER

#define LZ4_VERSION_NUMBER   (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)

Definition at line 105 of file lz4.h.

◆ LZ4_VERSION_RELEASE

#define LZ4_VERSION_RELEASE   3 /* for tweaks, bug-fixes, or development */

Definition at line 103 of file lz4.h.

◆ LZ4_VERSION_STRING

#define LZ4_VERSION_STRING   LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)

Definition at line 110 of file lz4.h.

◆ LZ4LIB_API

#define LZ4LIB_API   LZ4LIB_VISIBILITY

Definition at line 97 of file lz4.h.

◆ LZ4LIB_VISIBILITY

#define LZ4LIB_VISIBILITY

Introduction

LZ4 is lossless compression algorithm, providing compression speed >500 MB/s per core, scalable with multi-cores CPU. It features an extremely fast decoder, with speed in multiple GB/s per core, typically reaching RAM speed limits on multi-core systems.

The LZ4 compression library provides in-memory compression and decompression functions. It gives full buffer control to user. Compression can be done in:

  • a single step (described as Simple Functions)
  • a single step, reusing a context (described in Advanced Functions)
  • unbounded multiple steps (described as Streaming compression)

lz4.h generates and decodes LZ4-compressed blocks (doc/lz4_Block_format.md). Decompressing such a compressed block requires additional metadata. Exact metadata depends on exact decompression function. For the typical case of LZ4_decompress_safe(), metadata includes block's compressed size, and maximum bound of decompressed size. Each application is free to encode and pass such metadata in whichever way it wants.

lz4.h only handle blocks, it can not generate Frames.

Blocks are different from Frames (doc/lz4_Frame_format.md). Frames bundle both blocks and metadata in a specified manner. Embedding metadata is required for compressed data to be self-contained and portable. Frame format is delivered through a companion API, declared in lz4frame.h. The lz4 CLI can only manage frames.

Definition at line 89 of file lz4.h.

Typedef Documentation

◆ LZ4_byte

typedef unsigned char LZ4_byte

Definition at line 590 of file lz4.h.

◆ LZ4_i8

typedef signed char LZ4_i8

Definition at line 589 of file lz4.h.

◆ LZ4_stream_t

typedef union LZ4_stream_u LZ4_stream_t

Definition at line 265 of file lz4.h.

◆ LZ4_stream_t_internal

Definition at line 592 of file lz4.h.

◆ LZ4_streamDecode_t

Definition at line 345 of file lz4.h.

◆ LZ4_u16

typedef unsigned short LZ4_u16

Definition at line 591 of file lz4.h.

◆ LZ4_u32

typedef unsigned int LZ4_u32

Definition at line 592 of file lz4.h.

Function Documentation

◆ LZ4_compress_default()

LZ4LIB_API int LZ4_compress_default ( const char *  src,
char *  dst,
int  srcSize,
int  dstCapacity 
)

LZ4_compress_default() : Compresses 'srcSize' bytes from buffer 'src' into already allocated 'dst' buffer of size 'dstCapacity'. Compression is guaranteed to succeed if 'dstCapacity' >= LZ4_compressBound(srcSize). It also runs faster, so it's a recommended setting. If the function cannot compress 'src' into a more limited 'dst' budget, compression stops immediately, and the function result is zero. In which case, 'dst' content is undefined (invalid). srcSize : max supported value is LZ4_MAX_INPUT_SIZE. dstCapacity : size of buffer 'dst' (which must be already allocated)

Returns
: the number of bytes written into buffer 'dst' (necessarily <= dstCapacity) or 0 if compression fails Note : This function is protected against buffer overflow scenarios (never writes outside 'dst' buffer, nor read outside 'source' buffer).

Definition at line 1373 of file lz4.c.

1374 {
1376 }
lzma_index * src
Definition: index.h:567
int LZ4_compress_fast(const char *source, char *dest, int inputSize, int maxOutputSize, int acceleration)
Definition: lz4.c:1354
char int srcSize
Definition: lz4.h:697
char int int maxOutputSize
Definition: lz4.h:698
char * dst
Definition: lz4.h:724

References dst, LZ4_compress_fast(), maxOutputSize, src, and srcSize.

Referenced by bench(), fullSpeedBench(), FUZ_test(), FUZ_unitTests(), LLVMFuzzerTestOneInput(), local_LZ4_compress_default_large(), local_LZ4_compress_default_small(), LZ4_compress(), LZ4_compress_limitedOutput(), and main().

◆ LZ4_compress_destSize()

LZ4LIB_API int LZ4_compress_destSize ( const char *  src,
char *  dst,
int srcSizePtr,
int  targetDstSize 
)

LZ4_compress_destSize() : Reverse the logic : compresses as much data as possible from 'src' buffer into already allocated buffer 'dst', of size >= 'targetDestSize'. This function either compresses the entire 'src' content into 'dst' if it's large enough, or fill 'dst' buffer completely with as much data as possible from 'src'. note: acceleration parameter is fixed to "default".

*srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'. New value is necessarily <= input value.

Returns
: Nb bytes written into 'dst' (necessarily <= targetDestSize) or 0 if compression fails.

Note : from v1.8.2 to v1.9.1, this function had a bug (fixed un v1.9.2+): the produced compressed content could, in specific circumstances, require to be decompressed into a destination buffer larger by at least 1 byte than the content to decompress. If an application uses LZ4_compress_destSize(), it's highly recommended to update liblz4 to v1.9.2 or better. If this can't be done or ensured, the receiving decompression function should provide a dstCapacity which is > decompressedSize, by at least 1 byte. See https://github.com/lz4/lz4/issues/859 for details

Definition at line 1399 of file lz4.c.

1400 {
1401 #if (LZ4_HEAPMODE)
1402  LZ4_stream_t* ctx = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t)); /* malloc-calloc always properly aligned */
1403  if (ctx == NULL) return 0;
1404 #else
1405  LZ4_stream_t ctxBody;
1406  LZ4_stream_t* ctx = &ctxBody;
1407 #endif
1408 
1409  int result = LZ4_compress_destSize_extState(ctx, src, dst, srcSizePtr, targetDstSize);
1410 
1411 #if (LZ4_HEAPMODE)
1412  FREEMEM(ctx);
1413 #endif
1414  return result;
1415 }
#define NULL
Definition: cris-opc.c:27
#define ALLOC(s)
Definition: lz4.c:202
#define FREEMEM(p)
Definition: lz4.c:204
static int LZ4_compress_destSize_extState(LZ4_stream_t *state, const char *src, char *dst, int *srcSizePtr, int targetDstSize)
Definition: lz4.c:1382

References ALLOC, dst, FREEMEM, LZ4_compress_destSize_extState(), NULL, and src.

Referenced by FUZ_test(), FUZ_unitTests(), LLVMFuzzerTestOneInput(), and local_LZ4_compress_destSize().

◆ LZ4_compress_fast()

LZ4LIB_API int LZ4_compress_fast ( const char *  src,
char *  dst,
int  srcSize,
int  dstCapacity,
int  acceleration 
)

LZ4_compress_fast() : Same as LZ4_compress_default(), but allows selection of "acceleration" factor. The larger the acceleration value, the faster the algorithm, but also the lesser the compression. It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed. An acceleration value of "1" is the same as regular LZ4_compress_default() Values <= 0 will be replaced by LZ4_ACCELERATION_DEFAULT (currently == 1, see lz4.c). Values > LZ4_ACCELERATION_MAX will be replaced by LZ4_ACCELERATION_MAX (currently == 65537, see lz4.c).

Definition at line 1354 of file lz4.c.

1355 {
1356  int result;
1357 #if (LZ4_HEAPMODE)
1358  LZ4_stream_t* ctxPtr = ALLOC(sizeof(LZ4_stream_t)); /* malloc-calloc always properly aligned */
1359  if (ctxPtr == NULL) return 0;
1360 #else
1361  LZ4_stream_t ctx;
1362  LZ4_stream_t* const ctxPtr = &ctx;
1363 #endif
1364  result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration);
1365 
1366 #if (LZ4_HEAPMODE)
1367  FREEMEM(ctxPtr);
1368 #endif
1369  return result;
1370 }
int LZ4_compress_fast_extState(void *state, const char *source, char *dest, int inputSize, int maxOutputSize, int acceleration)
Definition: lz4.c:1284
const char * source
Definition: lz4.h:699
const char char int inputSize
Definition: lz4.h:699
char * dest
Definition: lz4.h:697

References ALLOC, dest, FREEMEM, inputSize, LZ4_compress_fast_extState(), maxOutputSize, NULL, and source.

Referenced by bench(), local_LZ4_compress_fast0(), local_LZ4_compress_fast1(), local_LZ4_compress_fast17(), local_LZ4_compress_fast2(), LZ4_compress_default(), LZ4_compressBlockNoStream(), LZ4IO_LZ4_compress(), main(), and roundTripTest().

◆ LZ4_compress_fast_continue()

LZ4LIB_API int LZ4_compress_fast_continue ( LZ4_stream_t streamPtr,
const char *  src,
char *  dst,
int  srcSize,
int  dstCapacity,
int  acceleration 
)

LZ4_compress_fast_continue() : Compress 'src' content using data from previously compressed blocks, for better compression ratio. 'dst' buffer must be already allocated. If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.

Returns
: size of compressed block or 0 if there is an error (typically, cannot fit into 'dst').

Note 1 : Each invocation to LZ4_compress_fast_continue() generates a new block. Each block has precise boundaries. Each block must be decompressed separately, calling LZ4_decompress_*() with relevant metadata. It's not possible to append blocks together and expect a single invocation of LZ4_decompress_*() to decompress them together.

Note 2 : The previous 64KB of source data is assumed to remain present, unmodified, at same address in memory !

Note 3 : When input is structured as a double-buffer, each buffer can have any size, including < 64 KB. Make sure that buffers are separated, by at least one byte. This construction ensures that each block only depends on previous block.

Note 4 : If input buffer is a ring-buffer, it can have any size, including < 64 KB.

Note 5 : After an error, the stream status is undefined (invalid), it can only be reset or freed.

Definition at line 1565 of file lz4.c.

1569 {
1570  const tableType_t tableType = byU32;
1572  const BYTE* dictEnd = streamPtr->dictionary + streamPtr->dictSize;
1573 
1574  DEBUGLOG(5, "LZ4_compress_fast_continue (inputSize=%i)", inputSize);
1575 
1576  LZ4_renormDictT(streamPtr, inputSize); /* avoid index overflow */
1577  if (acceleration < 1) acceleration = LZ4_ACCELERATION_DEFAULT;
1578  if (acceleration > LZ4_ACCELERATION_MAX) acceleration = LZ4_ACCELERATION_MAX;
1579 
1580  /* invalidate tiny dictionaries */
1581  if ( (streamPtr->dictSize-1 < 4-1) /* intentional underflow */
1582  && (dictEnd != (const BYTE*)source) ) {
1583  DEBUGLOG(5, "LZ4_compress_fast_continue: dictSize(%u) at addr:%p is too small", streamPtr->dictSize, streamPtr->dictionary);
1584  streamPtr->dictSize = 0;
1585  streamPtr->dictionary = (const BYTE*)source;
1586  dictEnd = (const BYTE*)source;
1587  }
1588 
1589  /* Check overlapping input/dictionary space */
1590  { const BYTE* sourceEnd = (const BYTE*) source + inputSize;
1591  if ((sourceEnd > streamPtr->dictionary) && (sourceEnd < dictEnd)) {
1592  streamPtr->dictSize = (U32)(dictEnd - sourceEnd);
1593  if (streamPtr->dictSize > 64 KB) streamPtr->dictSize = 64 KB;
1594  if (streamPtr->dictSize < 4) streamPtr->dictSize = 0;
1595  streamPtr->dictionary = dictEnd - streamPtr->dictSize;
1596  }
1597  }
1598 
1599  /* prefix mode : source data follows dictionary */
1600  if (dictEnd == (const BYTE*)source) {
1601  if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset))
1602  return LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, withPrefix64k, dictSmall, acceleration);
1603  else
1604  return LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, withPrefix64k, noDictIssue, acceleration);
1605  }
1606 
1607  /* external dictionary mode */
1608  { int result;
1609  if (streamPtr->dictCtx) {
1610  /* We depend here on the fact that dictCtx'es (produced by
1611  * LZ4_loadDict) guarantee that their tables contain no references
1612  * to offsets between dictCtx->currentOffset - 64 KB and
1613  * dictCtx->currentOffset - dictCtx->dictSize. This makes it safe
1614  * to use noDictIssue even when the dict isn't a full 64 KB.
1615  */
1616  if (inputSize > 4 KB) {
1617  /* For compressing large blobs, it is faster to pay the setup
1618  * cost to copy the dictionary's tables into the active context,
1619  * so that the compression loop is only looking into one table.
1620  */
1621  LZ4_memcpy(streamPtr, streamPtr->dictCtx, sizeof(*streamPtr));
1622  result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingExtDict, noDictIssue, acceleration);
1623  } else {
1624  result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingDictCtx, noDictIssue, acceleration);
1625  }
1626  } else {
1627  if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset)) {
1628  result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingExtDict, dictSmall, acceleration);
1629  } else {
1630  result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingExtDict, noDictIssue, acceleration);
1631  }
1632  }
1633  streamPtr->dictionary = (const BYTE*)source;
1634  streamPtr->dictSize = (U32)inputSize;
1635  return result;
1636  }
1637 }
static LZ4_stream_t LZ4_stream
Definition: fullbench.c:169
#define KB
Definition: lz4.c:223
LZ4_FORCE_INLINE int LZ4_compress_generic(LZ4_stream_t_internal *const cctx, const char *const src, char *const dst, const int srcSize, int *inputConsumed, const int dstCapacity, const limitedOutput_directive outputDirective, const tableType_t tableType, const dict_directive dictDirective, const dictIssue_directive dictIssue, const int acceleration)
Definition: lz4.c:1246
unsigned char BYTE
Definition: lz4.c:286
#define LZ4_memcpy(dst, src, size)
Definition: lz4.c:322
#define DEBUGLOG(l,...)
Definition: lz4.c:261
@ noDictIssue
Definition: lz4.c:666
@ dictSmall
Definition: lz4.c:666
@ withPrefix64k
Definition: lz4.c:665
@ usingExtDict
Definition: lz4.c:665
@ usingDictCtx
Definition: lz4.c:665
@ limitedOutput
Definition: lz4.c:302
unsigned int U32
Definition: lz4.c:288
#define LZ4_ACCELERATION_MAX
Definition: lz4.c:57
#define LZ4_ACCELERATION_DEFAULT
Definition: lz4.c:51
tableType_t
Definition: lz4.c:640
@ byU32
Definition: lz4.c:640
static void LZ4_renormDictT(LZ4_stream_t_internal *LZ4_dict, int nextSize)
Definition: lz4.c:1545
const LZ4_stream_t_internal * dictCtx
Definition: lz4.h:601
LZ4_u32 currentOffset
Definition: lz4.h:598
const LZ4_byte * dictionary
Definition: lz4.h:600
LZ4_u32 dictSize
Definition: lz4.h:602
LZ4_stream_t_internal internal_donotuse
Definition: lz4.h:627

References byU32, LZ4_stream_t_internal::currentOffset, DEBUGLOG, dest, LZ4_stream_t_internal::dictCtx, LZ4_stream_t_internal::dictionary, LZ4_stream_t_internal::dictSize, dictSmall, inputSize, LZ4_stream_u::internal_donotuse, KB, limitedOutput, LZ4_ACCELERATION_DEFAULT, LZ4_ACCELERATION_MAX, LZ4_compress_generic(), LZ4_memcpy, LZ4_renormDictT(), LZ4_stream, maxOutputSize, noDictIssue, NULL, source, usingDictCtx, usingExtDict, and withPrefix64k.

Referenced by FUZ_test(), FUZ_unitTests(), local_LZ4_compress_fast_continue0(), LZ4_compress_continue(), LZ4_compress_limitedOutput_continue(), LZ4_compressBlockStream(), LZ4F_compressBlock(), LZ4F_compressBlock_continue(), state_extDictRoundTrip(), state_prefixRoundTrip(), and test_compress().

◆ LZ4_compress_fast_extState()

LZ4LIB_API int LZ4_compress_fast_extState ( void *  state,
const char *  src,
char *  dst,
int  srcSize,
int  dstCapacity,
int  acceleration 
)

Definition at line 1284 of file lz4.c.

1285 {
1286  LZ4_stream_t_internal* const ctx = & LZ4_initStream(state, sizeof(LZ4_stream_t)) -> internal_donotuse;
1287  assert(ctx != NULL);
1288  if (acceleration < 1) acceleration = LZ4_ACCELERATION_DEFAULT;
1289  if (acceleration > LZ4_ACCELERATION_MAX) acceleration = LZ4_ACCELERATION_MAX;
1291  if (inputSize < LZ4_64Klimit) {
1293  } else {
1294  const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > LZ4_DISTANCE_MAX)) ? byPtr : byU32;
1295  return LZ4_compress_generic(ctx, source, dest, inputSize, NULL, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
1296  }
1297  } else {
1298  if (inputSize < LZ4_64Klimit) {
1300  } else {
1301  const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > LZ4_DISTANCE_MAX)) ? byPtr : byU32;
1303  }
1304  }
1305 }
int LZ4_compressBound(int isize)
Definition: lz4.c:674
LZ4_stream_t * LZ4_initStream(void *buffer, size_t size)
Definition: lz4.c:1443
@ noDict
Definition: lz4.c:665
size_t uptrval
Definition: lz4.c:291
@ notLimited
Definition: lz4.c:301
static const int LZ4_64Klimit
Definition: lz4.c:633
#define assert(condition)
Definition: lz4.c:245
@ byU16
Definition: lz4.c:640
@ byPtr
Definition: lz4.c:640
Definition: dis.h:43

References assert, byPtr, byU16, byU32, dest, inputSize, limitedOutput, LZ4_64Klimit, LZ4_ACCELERATION_DEFAULT, LZ4_ACCELERATION_MAX, LZ4_compress_generic(), LZ4_compressBound(), LZ4_initStream(), maxOutputSize, noDict, noDictIssue, notLimited, NULL, and source.

Referenced by bench(), FUZ_test(), local_LZ4_compress_fast_extState0(), LZ4_compress_destSize_extState(), LZ4_compress_fast(), LZ4_compress_limitedOutput_withState(), LZ4_compress_withState(), and main().

◆ LZ4_compressBound()

LZ4LIB_API int LZ4_compressBound ( int  inputSize)

LZ4_compressBound() : Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible) This function is primarily useful for memory allocation purposes (destination buffer size). Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example). Note that LZ4_compress_default() compresses faster when dstCapacity is >= LZ4_compressBound(srcSize) inputSize : max supported value is LZ4_MAX_INPUT_SIZE return : maximum output size in a "worst case" scenario or 0, if input size is incorrect (too large or negative)

Definition at line 674 of file lz4.c.

674 { return LZ4_COMPRESSBOUND(isize); }
#define LZ4_COMPRESSBOUND(isize)
Definition: lz4.h:171
char int isize
Definition: lz4.h:706

References isize, and LZ4_COMPRESSBOUND.

Referenced by BMK_benchMem(), fullSpeedBench(), FUZ_test(), FUZ_unitTests(), LLVMFuzzerTestOneInput(), local_LZ4_compress_default_large(), local_LZ4_compress_default_small(), local_LZ4_compress_destSize(), local_LZ4_compress_fast0(), local_LZ4_compress_fast1(), local_LZ4_compress_fast17(), local_LZ4_compress_fast2(), local_LZ4_compress_fast_continue0(), local_LZ4_compress_fast_extState0(), local_LZ4_compress_HC(), local_LZ4_compress_HC_continue(), local_LZ4_compress_HC_extStateHC(), LZ4_compress(), LZ4_compress_continue(), LZ4_compress_destSize_extState(), LZ4_compress_fast_extState(), LZ4_compress_fast_extState_fastReset(), LZ4_compress_HC_continue(), LZ4_compress_HC_extStateHC_fastReset(), LZ4_compress_withState(), LZ4_compressHC(), LZ4_compressHC2(), LZ4_compressHC2_withStateHC(), LZ4_compressHC_continue(), LZ4_compressHC_withStateHC(), LZ4IO_compressFilename_Legacy(), LZ4IO_decodeLegacyStream(), main(), roundTripCheck(), and state_create().

◆ LZ4_createStream()

LZ4LIB_API LZ4_stream_t* LZ4_createStream ( void  )

Definition at line 1423 of file lz4.c.

1424 {
1425  LZ4_stream_t* const lz4s = (LZ4_stream_t*)ALLOC(sizeof(LZ4_stream_t));
1426  LZ4_STATIC_ASSERT(LZ4_STREAMSIZE >= sizeof(LZ4_stream_t_internal)); /* A compilation error here means LZ4_STREAMSIZE is not large enough */
1427  DEBUGLOG(4, "LZ4_createStream %p", lz4s);
1428  if (lz4s == NULL) return NULL;
1429  LZ4_initStream(lz4s, sizeof(*lz4s));
1430  return lz4s;
1431 }
#define LZ4_STATIC_ASSERT(c)
Definition: lz4.c:249
#define LZ4_STREAMSIZE
Definition: lz4.h:623

References ALLOC, DEBUGLOG, LZ4_initStream(), LZ4_STATIC_ASSERT, LZ4_STREAMSIZE, test-lz4-versions::lz4s, and NULL.

Referenced by FUZ_unitTests(), LZ4_compressInitStream(), LZ4_create(), LZ4F_compressBegin_usingCDict(), LZ4F_createCDict(), state_attachDictRoundTrip(), state_create(), and test_compress().

◆ LZ4_createStreamDecode()

LZ4LIB_API LZ4_streamDecode_t* LZ4_createStreamDecode ( void  )

LZ4_createStreamDecode() and LZ4_freeStreamDecode() : creation / destruction of streaming decompression tracking context. A tracking context can be re-used multiple times.

Definition at line 2265 of file lz4.c.

2266 {
2268  LZ4_STATIC_ASSERT(LZ4_STREAMDECODESIZE >= sizeof(LZ4_streamDecode_t_internal)); /* A compilation error here means LZ4_STREAMDECODESIZE is not large enough */
2269  return lz4s;
2270 }
#define ALLOC_AND_ZERO(s)
Definition: lz4.c:203
#define LZ4_STREAMDECODESIZE
Definition: lz4.h:656

References ALLOC_AND_ZERO, LZ4_STATIC_ASSERT, LZ4_STREAMDECODESIZE, and test-lz4-versions::lz4s.

Referenced by state_create(), and test_decompress().

◆ LZ4_decoderRingBufferSize()

LZ4LIB_API int LZ4_decoderRingBufferSize ( int  maxBlockSize)

LZ4_decoderRingBufferSize() : v1.8.2+ Note : in a ring buffer scenario (optional), blocks are presumed decompressed next to each other up to the moment there is not enough remaining space for next block (remainingSize < maxBlockSize), at which stage it resumes from beginning of ring buffer. When setting such a ring buffer for streaming decompression, provides the minimum size of this ring buffer to be compatible with any source respecting maxBlockSize condition.

Returns
: minimum ring buffer size, or 0 if there is an error (invalid maxBlockSize).

LZ4_decoderRingBufferSize() : when setting a ring buffer for streaming decompression (optional scenario), provides the minimum size of this ring buffer to be compatible with any source respecting maxBlockSize condition. Note : in a ring buffer scenario, blocks are presumed decompressed next to each other. When not enough space remains for next block (remainingSize < maxBlockSize), decoding resumes from beginning of ring buffer.

Returns
: minimum ring buffer size, or 0 if there is an error (invalid maxBlockSize).

Definition at line 2306 of file lz4.c.

2307 {
2308  if (maxBlockSize < 0) return 0;
2309  if (maxBlockSize > LZ4_MAX_INPUT_SIZE) return 0;
2310  if (maxBlockSize < 16) maxBlockSize = 16;
2311  return LZ4_DECODER_RING_BUFFER_SIZE(maxBlockSize);
2312 }
#define LZ4_DECODER_RING_BUFFER_SIZE(maxBlockSize)
Definition: lz4.h:382
#define LZ4_MAX_INPUT_SIZE
Definition: lz4.h:170

References LZ4_DECODER_RING_BUFFER_SIZE, and LZ4_MAX_INPUT_SIZE.

Referenced by FUZ_unitTests().

◆ LZ4_decompress_fast()

LZ4LIB_API int LZ4_decompress_fast ( const char *  src,
char *  dst,
int  originalSize 
)

Obsolete LZ4_decompress_fast variants (since v1.9.0) : These functions used to be faster than LZ4_decompress_safe(), but this is no longer the case. They are now slower. This is because LZ4_decompress_fast() doesn't know the input size, and therefore must progress more cautiously into the input buffer to not read beyond the end of block. On top of that LZ4_decompress_fast() is not protected vs malformed or malicious inputs, making it a security liability. As a consequence, LZ4_decompress_fast() is strongly discouraged, and deprecated.

The last remaining LZ4_decompress_fast() specificity is that it can decompress a block without knowing its compressed size. Such functionality can be achieved in a more secure manner by employing LZ4_decompress_safe_partial().

Parameters: originalSize : is the uncompressed size to regenerate. dst must be already allocated, its size must be >= 'originalSize' bytes.

Returns
: number of bytes read from source buffer (== compressed size). The function expects to finish at block's end exactly. If the source stream is detected malformed, the function stops decoding and returns a negative result. note : LZ4_decompress_fast*() requires originalSize. Thanks to this information, it never writes past the output buffer. However, since it doesn't know its 'src' size, it may read an unknown amount of input, past input buffer bounds. Also, since match offsets are not validated, match reads from 'src' may underflow too. These issues never happen if input (compressed) data is correct. But they may happen if input data is invalid (error or intentional tampering). As a consequence, use these functions in trusted environments with trusted data only.

Definition at line 2188 of file lz4.c.

2189 {
2192  (BYTE*)dest - 64 KB, NULL, 0);
2193 }
@ endOnOutputSize
Definition: lz4.c:1692
@ decode_full_block
Definition: lz4.c:1693
LZ4_FORCE_INLINE int LZ4_decompress_generic(const char *const src, char *const dst, int srcSize, int outputSize, endCondition_directive endOnInput, earlyEnd_directive partialDecoding, dict_directive dict, const BYTE *const lowPrefix, const BYTE *const dictStart, const size_t dictSize)
Definition: lz4.c:1738
char int originalSize
Definition: lz4.h:725

References decode_full_block, dest, endOnOutputSize, KB, LZ4_decompress_generic(), NULL, originalSize, source, and withPrefix64k.

Referenced by bench(), FUZ_test(), local_LZ4_decompress_fast(), LZ4_decompress_fast_continue(), LZ4_decompress_fast_usingDict(), LZ4_decompress_fast_withPrefix64k(), and LZ4_uncompress().

◆ LZ4_decompress_fast_continue()

LZ4LIB_API int LZ4_decompress_fast_continue ( LZ4_streamDecode_t LZ4_streamDecode,
const char *  src,
char *  dst,
int  originalSize 
)

Definition at line 2362 of file lz4.c.

2363 {
2364  LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
2365  int result;
2366  assert(originalSize >= 0);
2367 
2368  if (lz4sd->prefixSize == 0) {
2369  assert(lz4sd->extDictSize == 0);
2371  if (result <= 0) return result;
2372  lz4sd->prefixSize = (size_t)originalSize;
2373  lz4sd->prefixEnd = (BYTE*)dest + originalSize;
2374  } else if (lz4sd->prefixEnd == (BYTE*)dest) {
2375  if (lz4sd->prefixSize >= 64 KB - 1 || lz4sd->extDictSize == 0)
2377  else
2379  lz4sd->prefixSize, lz4sd->externalDict, lz4sd->extDictSize);
2380  if (result <= 0) return result;
2381  lz4sd->prefixSize += (size_t)originalSize;
2382  lz4sd->prefixEnd += originalSize;
2383  } else {
2384  lz4sd->extDictSize = lz4sd->prefixSize;
2385  lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
2387  lz4sd->externalDict, lz4sd->extDictSize);
2388  if (result <= 0) return result;
2389  lz4sd->prefixSize = (size_t)originalSize;
2390  lz4sd->prefixEnd = (BYTE*)dest + originalSize;
2391  }
2392 
2393  return result;
2394 }
LZ4_FORCE_INLINE int LZ4_decompress_fast_doubleDict(const char *source, char *dest, int originalSize, size_t prefixSize, const void *dictStart, size_t dictSize)
Definition: lz4.c:2255
LZ4_FORCE_O2 int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
Definition: lz4.c:2188
static LZ4_FORCE_O2 int LZ4_decompress_fast_extDict(const char *source, char *dest, int originalSize, const void *dictStart, size_t dictSize)
Definition: lz4.c:2233
int size_t
Definition: sftypes.h:40
const LZ4_byte * prefixEnd
Definition: lz4.h:608
const LZ4_byte * externalDict
Definition: lz4.h:606
LZ4_streamDecode_t_internal internal_donotuse
Definition: lz4.h:659

References assert, dest, LZ4_streamDecode_t_internal::extDictSize, LZ4_streamDecode_t_internal::externalDict, LZ4_streamDecode_u::internal_donotuse, KB, LZ4_decompress_fast(), LZ4_decompress_fast_doubleDict(), LZ4_decompress_fast_extDict(), originalSize, LZ4_streamDecode_t_internal::prefixEnd, LZ4_streamDecode_t_internal::prefixSize, and source.

Referenced by FUZ_unitTests().

◆ LZ4_decompress_fast_usingDict()

LZ4LIB_API int LZ4_decompress_fast_usingDict ( const char *  src,
char *  dst,
int  originalSize,
const char *  dictStart,
int  dictSize 
)

Definition at line 2419 of file lz4.c.

2420 {
2421  if (dictSize==0 || dictStart+dictSize == dest)
2423  assert(dictSize >= 0);
2424  return LZ4_decompress_fast_extDict(source, dest, originalSize, dictStart, (size_t)dictSize);
2425 }

References assert, dest, LZ4_decompress_fast(), LZ4_decompress_fast_extDict(), originalSize, and source.

Referenced by FUZ_test(), local_LZ4_decompress_fast_usingDict_prefix(), and local_LZ4_decompress_fast_usingExtDict().

◆ LZ4_decompress_safe()

LZ4LIB_API int LZ4_decompress_safe ( const char *  src,
char *  dst,
int  compressedSize,
int  dstCapacity 
)

LZ4_decompress_safe() : compressedSize : is the exact complete size of the compressed block. dstCapacity : is the size of destination buffer (which must be already allocated), presumed an upper bound of decompressed size.

Returns
: the number of bytes decompressed into destination buffer (necessarily <= dstCapacity) If destination buffer is not large enough, decoding will stop and output an error code (negative value). If the source stream is detected malformed, the function will stop decoding and return a negative result. Note 1 : This function is protected against malicious data packets : it will never writes outside 'dst' buffer, nor read outside 'source' buffer, even if the compressed block is maliciously modified to order the decoder to do these actions. In such case, the decoder stops immediately, and considers the compressed block malformed. Note 2 : compressedSize and dstCapacity must be provided to the function, the compressed block does not contain them. The implementation is free to send / store / derive this information in whichever way is most beneficial. If there is a need for a different format which bundles together both compressed data and its metadata, consider looking at lz4frame.h instead.

Definition at line 2171 of file lz4.c.

2172 {
2173  return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize,
2175  (BYTE*)dest, NULL, 0);
2176 }
@ endOnInputSize
Definition: lz4.c:1692
char int compressedSize
Definition: lz4.h:724

References compressedSize, decode_full_block, dest, endOnInputSize, LZ4_decompress_generic(), noDict, NULL, and source.

Referenced by bench(), decompress(), fullSpeedBench(), FUZ_AddressOverflow(), FUZ_test(), FUZ_unitTests(), LLVMFuzzerTestOneInput(), LZ4_decompress_safe_continue(), LZ4_decompress_safe_usingDict(), LZ4_uncompress_unknownOutputSize(), LZ4IO_decodeLegacyStream(), main(), and roundTripTest().

◆ LZ4_decompress_safe_continue()

LZ4LIB_API int LZ4_decompress_safe_continue ( LZ4_streamDecode_t LZ4_streamDecode,
const char *  src,
char *  dst,
int  srcSize,
int  dstCapacity 
)

LZ4_decompress_*_continue() : These decoding functions allow decompression of consecutive blocks in "streaming" mode. A block is an unsplittable entity, it must be presented entirely to a decompression function. Decompression functions only accepts one block at a time. The last 64KB of previously decoded data must remain available and unmodified at the memory position where they were decoded. If less than 64KB of data has been decoded, all the data must be present.

Special : if decompression side sets a ring buffer, it must respect one of the following conditions :

  • Decompression buffer size is at least LZ4_decoderRingBufferSize(maxBlockSize). maxBlockSize is the maximum size of any single block. It can have any value > 16 bytes. In which case, encoding and decoding buffers do not need to be synchronized. Actually, data can be produced by any source compliant with LZ4 format specification, and respecting maxBlockSize.
  • Synchronized mode : Decompression buffer size is exactly the same as compression buffer size, and follows exactly same update rule (block boundaries at same positions), and decoding function is provided with exact decompressed size of each block (exception for last block of the stream), then decoding & encoding ring buffer can have any size, including small ones ( < 64 KB).
  • Decompression buffer is larger than encoding buffer, by a minimum of maxBlockSize more bytes. In which case, encoding and decoding buffers do not need to be synchronized, and encoding ring buffer can have any size, including small ones ( < 64 KB).

Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer where it can't be modified during decompression, then indicate where this data is saved using LZ4_setStreamDecode(), before decompressing next block.

Definition at line 2322 of file lz4.c.

2323 {
2324  LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
2325  int result;
2326 
2327  if (lz4sd->prefixSize == 0) {
2328  /* The first call, no dictionary yet. */
2329  assert(lz4sd->extDictSize == 0);
2331  if (result <= 0) return result;
2332  lz4sd->prefixSize = (size_t)result;
2333  lz4sd->prefixEnd = (BYTE*)dest + result;
2334  } else if (lz4sd->prefixEnd == (BYTE*)dest) {
2335  /* They're rolling the current segment. */
2336  if (lz4sd->prefixSize >= 64 KB - 1)
2338  else if (lz4sd->extDictSize == 0)
2340  lz4sd->prefixSize);
2341  else
2343  lz4sd->prefixSize, lz4sd->externalDict, lz4sd->extDictSize);
2344  if (result <= 0) return result;
2345  lz4sd->prefixSize += (size_t)result;
2346  lz4sd->prefixEnd += result;
2347  } else {
2348  /* The buffer wraps around, or they're switching to another buffer. */
2349  lz4sd->extDictSize = lz4sd->prefixSize;
2350  lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
2352  lz4sd->externalDict, lz4sd->extDictSize);
2353  if (result <= 0) return result;
2354  lz4sd->prefixSize = (size_t)result;
2355  lz4sd->prefixEnd = (BYTE*)dest + result;
2356  }
2357 
2358  return result;
2359 }
LZ4_FORCE_O2 int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest, int compressedSize, int maxOutputSize)
Definition: lz4.c:2198
static LZ4_FORCE_O2 int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest, int compressedSize, int maxOutputSize, size_t prefixSize)
Definition: lz4.c:2214
int LZ4_decompress_safe_forceExtDict(const char *source, char *dest, int compressedSize, int maxOutputSize, const void *dictStart, size_t dictSize)
Definition: lz4.c:2223
LZ4_FORCE_INLINE int LZ4_decompress_safe_doubleDict(const char *source, char *dest, int compressedSize, int maxOutputSize, size_t prefixSize, const void *dictStart, size_t dictSize)
Definition: lz4.c:2246
LZ4_FORCE_O2 int LZ4_decompress_safe(const char *source, char *dest, int compressedSize, int maxDecompressedSize)
Definition: lz4.c:2171

References assert, compressedSize, dest, LZ4_streamDecode_t_internal::extDictSize, LZ4_streamDecode_t_internal::externalDict, LZ4_streamDecode_u::internal_donotuse, KB, LZ4_decompress_safe(), LZ4_decompress_safe_doubleDict(), LZ4_decompress_safe_forceExtDict(), LZ4_decompress_safe_withPrefix64k(), LZ4_decompress_safe_withSmallPrefix(), maxOutputSize, LZ4_streamDecode_t_internal::prefixEnd, LZ4_streamDecode_t_internal::prefixSize, and source.

Referenced by FUZ_unitTests(), state_decompress(), and test_decompress().

◆ LZ4_decompress_safe_partial()

LZ4LIB_API int LZ4_decompress_safe_partial ( const char *  src,
char *  dst,
int  srcSize,
int  targetOutputSize,
int  dstCapacity 
)

LZ4_decompress_safe_partial() : Decompress an LZ4 compressed block, of size 'srcSize' at position 'src', into destination buffer 'dst' of size 'dstCapacity'. Up to 'targetOutputSize' bytes will be decoded. The function stops decoding on reaching this objective. This can be useful to boost performance whenever only the beginning of a block is required.

Returns
: the number of bytes decoded in dst (necessarily <= targetOutputSize) If source stream is detected malformed, function returns a negative result.

Note 1 :

Returns
can be < targetOutputSize, if compressed block contains less data.

Note 2 : targetOutputSize must be <= dstCapacity

Note 3 : this function effectively stops decoding on reaching targetOutputSize, so dstCapacity is kind of redundant. This is because in older versions of this function, decoding operation would still write complete sequences. Therefore, there was no guarantee that it would stop writing at exactly targetOutputSize, it could write more bytes, though only up to dstCapacity. Some "margin" used to be required for this operation to work properly. Thankfully, this is no longer necessary. The function nonetheless keeps the same signature, in an effort to preserve API compatibility.

Note 4 : If srcSize is the exact size of the block, then targetOutputSize can be any value, including larger than the block's decompressed size. The function will, at most, generate block's decompressed size.

Note 5 : If srcSize is larger than block's compressed size, then targetOutputSize MUST be <= block's decompressed size. Otherwise, silent corruption will occur.

Definition at line 2179 of file lz4.c.

2180 {
2181  dstCapacity = MIN(targetOutputSize, dstCapacity);
2182  return LZ4_decompress_generic(src, dst, compressedSize, dstCapacity,
2184  noDict, (BYTE*)dst, NULL, 0);
2185 }
@ partial_decode
Definition: lz4.c:1693
#define MIN(a, b)
Definition: lz4.c:1696

References compressedSize, dst, endOnInputSize, LZ4_decompress_generic(), MIN, noDict, NULL, partial_decode, and src.

Referenced by FUZ_test(), LLVMFuzzerTestOneInput(), local_LZ4_decompress_safe_partial(), and main().

◆ LZ4_decompress_safe_usingDict()

LZ4LIB_API int LZ4_decompress_safe_usingDict ( const char *  src,
char *  dst,
int  srcSize,
int  dstCapcity,
const char *  dictStart,
int  dictSize 
)

LZ4_decompress_*_usingDict() : These decoding functions work the same as a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue() They are stand-alone, and don't need an LZ4_streamDecode_t structure. Dictionary is presumed stable : it must remain accessible and unmodified during decompression. Performance tip : Decompression speed can be substantially increased when dst == dictStart + dictSize.

Definition at line 2404 of file lz4.c.

2405 {
2406  if (dictSize==0)
2408  if (dictStart+dictSize == dest) {
2409  if (dictSize >= 64 KB - 1) {
2411  }
2412  assert(dictSize >= 0);
2414  }
2415  assert(dictSize >= 0);
2416  return LZ4_decompress_safe_forceExtDict(source, dest, compressedSize, maxOutputSize, dictStart, (size_t)dictSize);
2417 }

References assert, compressedSize, dest, KB, LZ4_decompress_safe(), LZ4_decompress_safe_forceExtDict(), LZ4_decompress_safe_withPrefix64k(), LZ4_decompress_safe_withSmallPrefix(), maxOutputSize, and source.

Referenced by BMK_benchMem(), FUZ_test(), FUZ_unitTests(), LLVMFuzzerTestOneInput(), local_LZ4_decompress_safe_usingDict(), and LZ4F_decompress().

◆ LZ4_DEPRECATED() [1/10]

LZ4_DEPRECATED ( "use LZ4_compress_default() instead"  ) const

Obsolete compression functions (since v1.7.3)

◆ LZ4_DEPRECATED() [2/10]

LZ4_DEPRECATED ( "use LZ4_compress_fast_continue() instead"  )

◆ LZ4_DEPRECATED() [3/10]

LZ4_DEPRECATED ( "use LZ4_compress_fast_extState() instead"  )

◆ LZ4_DEPRECATED() [4/10]

LZ4_DEPRECATED ( "Use LZ4_createStream() instead"  )

◆ LZ4_DEPRECATED() [5/10]

LZ4_DEPRECATED ( "use LZ4_decompress_fast() instead"  ) const

Obsolete decompression functions (since v1.8.0)

◆ LZ4_DEPRECATED() [6/10]

LZ4_DEPRECATED ( "use LZ4_decompress_fast_usingDict() instead"  ) const

◆ LZ4_DEPRECATED() [7/10]

LZ4_DEPRECATED ( "use LZ4_decompress_safe() instead"  ) const

◆ LZ4_DEPRECATED() [8/10]

LZ4_DEPRECATED ( "use LZ4_decompress_safe_usingDict() instead"  ) const

Obsolete streaming decoding functions (since v1.7.0)

◆ LZ4_DEPRECATED() [9/10]

LZ4_DEPRECATED ( "Use LZ4_resetStream() instead"  )

◆ LZ4_DEPRECATED() [10/10]

LZ4_DEPRECATED ( "Use LZ4_saveDict() instead"  )

◆ LZ4_freeStream()

LZ4LIB_API int LZ4_freeStream ( LZ4_stream_t streamPtr)

Definition at line 1465 of file lz4.c.

1466 {
1467  if (!LZ4_stream) return 0; /* support free on NULL */
1468  DEBUGLOG(5, "LZ4_freeStream %p", LZ4_stream);
1470  return (0);
1471 }

References DEBUGLOG, FREEMEM, and LZ4_stream.

Referenced by FUZ_unitTests(), LZ4_compressCleanupStream(), LZ4F_freeCDict(), state_attachDictRoundTrip(), state_free(), and test_compress().

◆ LZ4_freeStreamDecode()

LZ4LIB_API int LZ4_freeStreamDecode ( LZ4_streamDecode_t LZ4_stream)

Definition at line 2272 of file lz4.c.

2273 {
2274  if (LZ4_stream == NULL) { return 0; } /* support free on NULL */
2276  return 0;
2277 }

References FREEMEM, LZ4_stream, and NULL.

Referenced by state_free(), and test_decompress().

◆ LZ4_initStream()

LZ4LIB_API LZ4_stream_t* LZ4_initStream ( void *  buffer,
size_t  size 
)

LZ4_initStream() : v1.9.0+ An LZ4_stream_t structure must be initialized at least once. This is automatically done when invoking LZ4_createStream(), but it's not when the structure is simply declared on stack (for example).

Use LZ4_initStream() to properly initialize a newly declared LZ4_stream_t. It can also initialize any arbitrary buffer of sufficient size, and will

Returns
a pointer of proper type upon initialization.

Note : initialization fails if size and alignment conditions are not respected. In which case, the function will

Returns
NULL. Note2: An LZ4_stream_t structure guarantees correct alignment and size. Note3: Before v1.9.0, use LZ4_resetStream() instead

Definition at line 1443 of file lz4.c.

1444 {
1445  DEBUGLOG(5, "LZ4_initStream");
1446  if (buffer == NULL) { return NULL; }
1447  if (size < sizeof(LZ4_stream_t)) { return NULL; }
1449  MEM_INIT(buffer, 0, sizeof(LZ4_stream_t_internal));
1450  return (LZ4_stream_t*)buffer;
1451 }
struct buffer buffer
voidpf void uLong size
Definition: ioapi.h:138
#define MEM_INIT(p, v, s)
Definition: lz4.c:208
static int LZ4_isAligned(const void *ptr, size_t alignment)
Definition: lz4.c:264
static size_t LZ4_stream_t_alignment(void)
Definition: lz4.c:1433
Definition: buffer.h:15

References DEBUGLOG, LZ4_isAligned(), LZ4_stream_t_alignment(), MEM_INIT, and NULL.

Referenced by FUZ_test(), FUZ_unitTests(), local_LZ4_createStream(), local_LZ4_resetDictT(), LZ4_compress_destSize_extState(), LZ4_compress_fast_extState(), LZ4_createStream(), LZ4F_compressBegin_usingCDict(), LZ4F_compressFrame(), and test_compress().

◆ LZ4_loadDict()

LZ4LIB_API int LZ4_loadDict ( LZ4_stream_t streamPtr,
const char *  dictionary,
int  dictSize 
)

LZ4_loadDict() : Use this function to reference a static dictionary into LZ4_stream_t. The dictionary must remain available during compression. LZ4_loadDict() triggers a reset, so any previous data will be forgotten. The same dictionary will have to be loaded on decompression side for successful decoding. Dictionary are useful for better compression of small data (KB range). While LZ4 accept any input as dictionary, results are generally better when using Zstandard's Dictionary Builder. Loading a size of 0 is allowed, and is the same as reset.

Returns
: loaded dictionary size, in bytes (necessarily <= 64 KB)

Definition at line 1475 of file lz4.c.

1476 {
1477  LZ4_stream_t_internal* dict = &LZ4_dict->internal_donotuse;
1478  const tableType_t tableType = byU32;
1479  const BYTE* p = (const BYTE*)dictionary;
1480  const BYTE* const dictEnd = p + dictSize;
1481  const BYTE* base;
1482 
1483  DEBUGLOG(4, "LZ4_loadDict (%i bytes from %p into %p)", dictSize, dictionary, LZ4_dict);
1484 
1485  /* It's necessary to reset the context,
1486  * and not just continue it with prepareTable()
1487  * to avoid any risk of generating overflowing matchIndex
1488  * when compressing using this dictionary */
1489  LZ4_resetStream(LZ4_dict);
1490 
1491  /* We always increment the offset by 64 KB, since, if the dict is longer,
1492  * we truncate it to the last 64k, and if it's shorter, we still want to
1493  * advance by a whole window length so we can provide the guarantee that
1494  * there are only valid offsets in the window, which allows an optimization
1495  * in LZ4_compress_fast_continue() where it uses noDictIssue even when the
1496  * dictionary isn't a full 64k. */
1497  dict->currentOffset += 64 KB;
1498 
1499  if (dictSize < (int)HASH_UNIT) {
1500  return 0;
1501  }
1502 
1503  if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
1504  base = dictEnd - dict->currentOffset;
1505  dict->dictionary = p;
1506  dict->dictSize = (U32)(dictEnd - p);
1507  dict->tableType = (U32)tableType;
1508 
1509  while (p <= dictEnd-HASH_UNIT) {
1510  LZ4_putPosition(p, dict->hashTable, tableType, base);
1511  p+=3;
1512  }
1513 
1514  return (int)dict->dictSize;
1515 }
void * p
Definition: libc.cpp:67
void LZ4_resetStream(LZ4_stream_t *LZ4_stream)
Definition: lz4.c:1455
LZ4_FORCE_INLINE void LZ4_putPosition(const BYTE *p, void *tableBase, tableType_t tableType, const BYTE *srcBase)
Definition: lz4.c:761
#define HASH_UNIT
Definition: lz4.c:1474
LZ4_u32 tableType
Definition: lz4.h:599
LZ4_u32 hashTable[LZ4_HASH_SIZE_U32]
Definition: lz4.h:597

References byU32, LZ4_stream_t_internal::currentOffset, DEBUGLOG, LZ4_stream_t_internal::dictionary, LZ4_stream_t_internal::dictSize, HASH_UNIT, LZ4_stream_t_internal::hashTable, LZ4_stream_u::internal_donotuse, KB, LZ4_putPosition(), LZ4_resetStream(), p, and LZ4_stream_t_internal::tableType.

Referenced by fullSpeedBench(), FUZ_test(), LZ4_compressInitStream(), LZ4F_createCDict(), state_attachDictRoundTrip(), state_loadDictRoundTrip(), and test_compress().

◆ LZ4_resetStream()

LZ4LIB_API void LZ4_resetStream ( LZ4_stream_t streamPtr)

LZ4_resetStream() : An LZ4_stream_t structure must be initialized at least once. This is done with LZ4_initStream(), or LZ4_resetStream(). Consider switching to LZ4_initStream(), invoking LZ4_resetStream() will trigger deprecation warnings in the future.

Definition at line 1455 of file lz4.c.

1456 {
1457  DEBUGLOG(5, "LZ4_resetStream (ctx:%p)", LZ4_stream);
1459 }

References DEBUGLOG, LZ4_stream, and MEM_INIT.

Referenced by LZ4_loadDict(), and LZ4_resetStreamState().

◆ LZ4_resetStream_fast()

LZ4LIB_API void LZ4_resetStream_fast ( LZ4_stream_t streamPtr)

LZ4_resetStream_fast() : v1.9.0+ Use this to prepare an LZ4_stream_t for a new chain of dependent blocks (e.g., LZ4_compress_fast_continue()).

An LZ4_stream_t must be initialized once before usage. This is automatically done when created by LZ4_createStream(). However, should the LZ4_stream_t be simply declared on stack (for example), it's necessary to initialize it first, using LZ4_initStream().

After init, start any new stream with LZ4_resetStream_fast(). A same LZ4_stream_t can be re-used multiple times consecutively and compress multiple streams, provided that it starts each new stream with LZ4_resetStream_fast().

LZ4_resetStream_fast() is much faster than LZ4_initStream(), but is not compatible with memory regions containing garbage data.

Note: it's only useful to call LZ4_resetStream_fast() in the context of streaming compression. The extState functions perform their own resets. Invoking LZ4_resetStream_fast() before is redundant, and even counterproductive.

Definition at line 1461 of file lz4.c.

1461  {
1462  LZ4_prepareTable(&(ctx->internal_donotuse), 0, byU32);
1463 }
LZ4_FORCE_INLINE void LZ4_prepareTable(LZ4_stream_t_internal *const cctx, const int inputSize, const tableType_t tableType)
Definition: lz4.c:806

References byU32, and LZ4_prepareTable().

Referenced by FUZ_test(), FUZ_unitTests(), LZ4_compressResetStream(), LZ4F_initStream(), and state_reset().

◆ LZ4_saveDict()

LZ4LIB_API int LZ4_saveDict ( LZ4_stream_t LZ4_dict,
char *  safeBuffer,
int  dictSize 
)

LZ4_saveDict() : If last 64KB data cannot be guaranteed to remain available at its current memory location, save it into a safer place (char* safeBuffer). This is schematically equivalent to a memcpy() followed by LZ4_loadDict(), but is much faster, because LZ4_saveDict() doesn't need to rebuild tables.

Returns
: saved dictionary size in bytes (necessarily <= maxDictSize), or 0 if error.

LZ4_saveDict() : If previously compressed data block is not guaranteed to remain available at its memory location, save it into a safer place (char* safeBuffer). Note : you don't need to call LZ4_loadDict() afterwards, dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue(). Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.

Definition at line 1668 of file lz4.c.

1669 {
1670  LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;
1671  const BYTE* const previousDictEnd = dict->dictionary + dict->dictSize;
1672 
1673  if ((U32)dictSize > 64 KB) { dictSize = 64 KB; } /* useless to define a dictionary > 64 KB */
1674  if ((U32)dictSize > dict->dictSize) { dictSize = (int)dict->dictSize; }
1675 
1676  if (safeBuffer == NULL) assert(dictSize == 0);
1677  if (dictSize > 0)
1678  memmove(safeBuffer, previousDictEnd - dictSize, dictSize);
1679 
1680  dict->dictionary = (const BYTE*)safeBuffer;
1681  dict->dictSize = (U32)dictSize;
1682 
1683  return dictSize;
1684 }
static int
Definition: sfsocketcall.h:114

References assert, LZ4_stream_t_internal::dictionary, LZ4_stream_t_internal::dictSize, int, LZ4_stream_u::internal_donotuse, KB, and NULL.

Referenced by FUZ_unitTests(), local_LZ4_saveDict(), and LZ4F_localSaveDict().

◆ LZ4_setStreamDecode()

LZ4LIB_API int LZ4_setStreamDecode ( LZ4_streamDecode_t LZ4_streamDecode,
const char *  dictionary,
int  dictSize 
)

LZ4_setStreamDecode() : An LZ4_streamDecode_t context can be allocated once and re-used multiple times. Use this function to start decompression of a new stream of blocks. A dictionary can optionally be set. Use NULL or size 0 for a reset order. Dictionary is presumed stable : it must remain accessible and unmodified during next decompression.

Returns
: 1 if OK, 0 if error

LZ4_setStreamDecode() : Use this function to instruct where to find the dictionary. This function is not necessary if previous data is still available where it was decoded. Loading a size of 0 is allowed (same effect as no dictionary).

Returns
: 1 if OK, 0 if error

Definition at line 2285 of file lz4.c.

2286 {
2287  LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
2288  lz4sd->prefixSize = (size_t) dictSize;
2289  lz4sd->prefixEnd = (const BYTE*) dictionary + dictSize;
2290  lz4sd->externalDict = NULL;
2291  lz4sd->extDictSize = 0;
2292  return 1;
2293 }

References LZ4_streamDecode_t_internal::extDictSize, LZ4_streamDecode_t_internal::externalDict, LZ4_streamDecode_u::internal_donotuse, NULL, LZ4_streamDecode_t_internal::prefixEnd, and LZ4_streamDecode_t_internal::prefixSize.

Referenced by FUZ_unitTests(), state_attachDictHCRoundTrip(), state_attachDictRoundTrip(), state_loadDictHCRoundTrip(), state_loadDictRoundTrip(), state_reset(), and test_decompress().

◆ LZ4_sizeofState()

LZ4LIB_API int LZ4_sizeofState ( void  )

LZ4_compress_fast_extState() : Same as LZ4_compress_fast(), using an externally allocated memory space for its state. Use LZ4_sizeofState() to know how much memory must be allocated, and allocate it on 8-bytes boundaries (using malloc() typically). Then, provide this buffer as void* state to compression function.

Definition at line 675 of file lz4.c.

675 { return LZ4_STREAMSIZE; }

References LZ4_STREAMSIZE.

Referenced by FUZ_test().

◆ LZ4_versionNumber()

LZ4LIB_API int LZ4_versionNumber ( void  )

library version number; useful to check dll version

Definition at line 672 of file lz4.c.

672 { return LZ4_VERSION_NUMBER; }
#define LZ4_VERSION_NUMBER
Definition: lz4.h:105

References LZ4_VERSION_NUMBER.

Referenced by main().

◆ LZ4_versionString()

LZ4LIB_API const char* LZ4_versionString ( void  )

library version string; useful to check dll version

Definition at line 673 of file lz4.c.

673 { return LZ4_VERSION_STRING; }
#define LZ4_VERSION_STRING
Definition: lz4.h:110

References LZ4_VERSION_STRING.

Referenced by main().

Variable Documentation

◆ compressedSize

◆ dest

const char char * dest

Definition at line 697 of file lz4.h.

Referenced by arm32math(), arm_code(), armthumb_code(), bsd_generate_corefile(), cabx_copy(), compress(), compress2(), concat(), def(), deflateCopy(), download_and_write(), get_arg(), gzungetc(), ia64_code(), index_dup_stream(), inf(), inflateCopy(), log_replace(), lua_load_block(), lua_parse_string(), LZ4_compress(), LZ4_compress_continue(), LZ4_compress_fast(), LZ4_compress_fast_continue(), LZ4_compress_fast_extState(), LZ4_compress_forceExtDict(), LZ4_compress_generic_validated(), LZ4_compress_HC_destSize(), LZ4_compress_limitedOutput(), LZ4_decompress_fast(), LZ4_decompress_fast_continue(), LZ4_decompress_fast_doubleDict(), LZ4_decompress_fast_extDict(), LZ4_decompress_fast_usingDict(), LZ4_decompress_fast_withPrefix64k(), LZ4_decompress_safe(), LZ4_decompress_safe_continue(), LZ4_decompress_safe_doubleDict(), LZ4_decompress_safe_forceExtDict(), LZ4_decompress_safe_usingDict(), LZ4_decompress_safe_withPrefix64k(), LZ4_decompress_safe_withSmallPrefix(), LZ4_uncompress(), LZ4_uncompress_unknownOutputSize(), LZ4HC_compress_hashChain(), LZMA_API(), m_copy(), main(), mem_copy(), mk_reg_str(), msp_copy(), powerpc_code(), print_insn_hppa(), puff(), recurse(), recurse_bb(), rz_mem_cmp_mask(), rz_mem_copy(), rz_mem_copyloop(), rz_mem_set_num(), rz_mem_swapendian(), rz_mem_swaporcopy(), rz_write_at_be16(), rz_write_at_be32(), rz_write_at_be64(), rz_write_at_be8(), rz_write_at_be_double(), rz_write_at_be_float(), rz_write_at_ble8(), rz_write_at_le16(), rz_write_at_le32(), rz_write_at_le64(), rz_write_at_le8(), rz_write_at_le_double(), rz_write_at_le_float(), rz_write_at_me16(), rz_write_at_me32(), rz_write_at_me64(), rz_write_at_me8(), rz_write_at_me_double(), rz_write_at_me_float(), rz_write_be16(), rz_write_be24(), rz_write_be32(), rz_write_be64(), rz_write_be8(), rz_write_be_double(), rz_write_be_float(), rz_write_ble16(), rz_write_ble24(), rz_write_ble32(), rz_write_ble64(), rz_write_ble8(), rz_write_le16(), rz_write_le24(), rz_write_le32(), rz_write_le64(), rz_write_le8(), rz_write_le_double(), rz_write_le_float(), rz_write_me16(), rz_write_me32(), rz_write_me64(), rz_write_me8(), rz_write_me_double(), rz_write_me_float(), sparc_code(), swap_big_regs(), system_common_handler(), ts_subtree_array_copy(), uncompress(), uncompress2(), write_data(), write_thread_id(), x86_code(), xnu_generate_corefile(), xstrdup(), XXH_memcpy(), yxml_setchar(), yxml_setutf8(), zip64local_putValue_inmemory(), zmemcpy(), and zmemzero().

◆ dst

char * dst

Definition at line 724 of file lz4.h.

Referenced by _6502_analysis_esil_mov(), _nettle_aes_decrypt(), _nettle_aes_encrypt(), _nettle_aes_invert(), _zip_buffer_put(), _zip_error_copy(), _zip_stat_merge(), aes_decrypt(), aes_encrypt(), aes_invert_key(), anop_esil(), arm32mathaddsub(), arm_assemble(), avr_il_assign_reg(), avr_il_set16_from_reg(), bench(), buf_format(), can_affect_bp(), cbz(), check_buffer_jmp(), check_buffer_rjmp(), copy_foreach_cb(), copy_object(), copy_string_n(), count_edges(), cr16_print_longregreg_reg(), cr16_print_reg_reg(), cr16_print_reg_reg_rel(), d68020_cpgen(), d_save_scope(), dalvik_op(), decode_addressing_mode(), decode_emulation(), decompress(), decompress_file_allocDst(), decompress_file_internal(), emit_branch(), emit_load(), emit_load_ptr(), encode_var_int(), escape_char(), esil_add(), esil_add_imm(), esil_add_sub(), esil_addeq(), esil_and(), esil_andeq(), esil_bigger(), esil_bigger_equal(), esil_bitwise_op(), esil_cmp(), esil_div(), esil_diveq(), esil_eq(), esil_load_relative(), esil_lsl(), esil_lsleq(), esil_lsr(), esil_lsreq(), esil_mem_addeq_n(), esil_mem_andeq_n(), esil_mem_diveq_n(), esil_mem_lsleq_n(), esil_mem_lsreq_n(), esil_mem_modeq_n(), esil_mem_muleq_n(), esil_mem_oreq_n(), esil_mem_subeq_n(), esil_mem_xoreq_n(), esil_mod(), esil_modeq(), esil_move(), esil_move_conditional(), esil_mul(), esil_muleq(), esil_or(), esil_oreq(), esil_peek_n(), esil_peek_some(), esil_poke_n(), esil_poke_some(), esil_pop(), esil_repeat(), esil_rol(), esil_ror(), esil_signed_div(), esil_signed_mod(), esil_smaller(), esil_smaller_equal(), esil_sub(), esil_subeq(), esil_weak_eq(), esil_xor(), esil_xoreq(), function_print_calls(), FUZ_unitTests(), FUZZ_decompressFrame(), get_edge_number(), iconv_a2e(), iconv_e2a(), il_opdmp_jmp(), il_unconditional(), inet_ntop4(), inet_ntop6(), inet_pton4(), inet_pton6(), insert(), ioMemcpy(), is_delta_pointer_table(), is_used_like_arg(), lbuf_strcat(), LLVMFuzzerTestOneInput(), local_context_copy(), local_LZ4F_decompress_followHint(), local_LZ4F_decompress_noHint(), local_var_copy_avail_cb(), local_var_copy_known_cb(), LZ4_compress_default(), LZ4_compress_destSize(), LZ4_compress_destSize_extState(), LZ4_compress_fast_extState_fastReset(), LZ4_compress_generic(), LZ4_compress_HC(), LZ4_compress_HC_continue(), LZ4_compress_HC_continue_destSize(), LZ4_compress_HC_extStateHC(), LZ4_compress_HC_extStateHC_fastReset(), LZ4_compress_limitedOutput_continue(), LZ4_compress_limitedOutput_withState(), LZ4_compress_withState(), LZ4_compressBlockNoStream(), LZ4_compressBlockNoStreamHC(), LZ4_compressBlockStream(), LZ4_compressBlockStreamHC(), LZ4_compressHC(), LZ4_compressHC2(), LZ4_compressHC2_continue(), LZ4_compressHC2_limitedOutput(), LZ4_compressHC2_limitedOutput_continue(), LZ4_compressHC2_limitedOutput_withStateHC(), LZ4_compressHC2_withStateHC(), LZ4_compressHC_continue(), LZ4_compressHC_continue_generic(), LZ4_compressHC_limitedOutput(), LZ4_compressHC_limitedOutput_continue(), LZ4_compressHC_limitedOutput_withStateHC(), LZ4_compressHC_withStateHC(), LZ4_decompress_generic(), LZ4_decompress_safe_partial(), LZ4F_compressBlock(), LZ4F_compressBlock_continue(), LZ4F_compressBlockHC(), LZ4F_compressBlockHC_continue(), LZ4F_makeBlock(), LZ4F_writeLE32(), LZ4F_writeLE64(), LZ4HC_compress_generic(), LZ4HC_compress_generic_dictCtx(), LZ4HC_compress_generic_internal(), LZ4HC_compress_generic_noDictCtx(), LZ4HC_compress_optimal(), LZ4IO_compressFilename_Legacy(), LZ4IO_LZ4_compress(), main(), make_program_args(), make_program_env(), mcopy(), mode_cmd_desc_help(), msr(), nettle_aes128_decrypt(), nettle_aes128_encrypt(), nettle_aes128_invert_key(), nettle_aes192_decrypt(), nettle_aes192_encrypt(), nettle_aes192_invert_key(), nettle_aes256_decrypt(), nettle_aes256_encrypt(), nettle_aes256_invert_key(), nios2_disassemble(), num_callback(), pack_hex(), perform_jump(), regs_exist(), relocs_foreach(), rjmp_dest(), rz_analysis_block_shortest_path(), rz_analysis_data(), rz_analysis_esil_reg_write(), rz_analysis_esil_signext(), rz_big_assign(), rz_buf_fread(), rz_bv_copy(), rz_bv_copy_nbits(), rz_cmd_debug(), rz_cmd_print(), rz_cons_pal_copy(), rz_core_analysis_coderefs(), rz_core_analysis_datarefs(), rz_core_analysis_esil(), rz_core_print_disasm_all(), rz_core_visual_graph(), rz_deflate_buf(), rz_file_copy(), rz_file_deflate(), rz_file_inflate(), rz_il_handler_jmp(), rz_il_op_effect_free(), rz_il_op_new_jmp(), rz_inflate_buf(), rz_lzma_dec_buf(), rz_lzma_enc_buf(), rz_mem_copybits(), rz_mem_copybits_delta(), rz_mem_memzero(), rz_print_hexpair(), rz_punycode_decode(), rz_punycode_encode(), rz_reg_set_pack(), rz_str_byte_escape(), rz_str_ccmp(), rz_str_ccpy(), rz_str_ebcdic_es_from_ascii(), rz_str_ebcdic_es_from_unicode(), rz_str_ebcdic_es_to_ascii(), rz_str_ebcdic_es_to_unicode(), rz_str_ebcdic_uk_from_ascii(), rz_str_ebcdic_uk_from_unicode(), rz_str_ebcdic_uk_to_ascii(), rz_str_ebcdic_uk_to_unicode(), rz_str_ebcdic_us_from_ascii(), rz_str_ebcdic_us_from_unicode(), rz_str_ebcdic_us_to_ascii(), rz_str_ebcdic_us_to_unicode(), rz_str_home(), rz_str_ibm037_from_ascii(), rz_str_ibm037_from_unicode(), rz_str_ibm037_to_ascii(), rz_str_ibm037_to_unicode(), rz_str_ibm290_from_ascii(), rz_str_ibm290_from_unicode(), rz_str_ibm290_to_ascii(), rz_str_ibm290_to_unicode(), rz_str_ncpy(), rz_str_trim_path(), rz_str_utf16_to_utf8(), rz_strbuf_copy(), rz_type_byte_escape(), rz_utf8_encode_str(), rz_write_ble(), rz_write_from_io_xchg_handler(), rz_write_unified_patch_handler(), saturate(), saturate_signed(), saturate_signed_to_range(), saturate_unsigned(), sdb_copy(), section_perms_str(), state_decompress(), state_extDictHCRoundTrip(), state_extDictRoundTrip(), state_prefixHCRoundTrip(), state_prefixRoundTrip(), test_lz4f_decompression_wBuffers(), to_bin_string(), unescape_special_chars(), unpack_hex(), uv__to_stat(), uv_inet_ntop(), uv_inet_pton(), uv_ip4_name(), uv_ip6_name(), vector_clone(), writebit(), xtensa_check_stack_op(), XXH32_canonicalFromHash(), and XXH64_canonicalFromHash().

◆ inputBuffer

char* inputBuffer

Definition at line 720 of file lz4.h.

Referenced by LZ4_create(), LZ4_createHC(), LZ4_resetStreamState(), and LZ4_resetStreamStateHC().

◆ inputSize

◆ isize

char int isize

Definition at line 706 of file lz4.h.

Referenced by LZ4_compressBound(), and LZ4_uncompress_unknownOutputSize().

◆ maxDstSize

◆ maxOutputSize

◆ originalSize

◆ outputSize

char int outputSize

Definition at line 705 of file lz4.h.

Referenced by LZ4_decompress_generic(), and LZ4_uncompress().

◆ source

◆ srcSize

char int srcSize

Definition at line 697 of file lz4.h.

Referenced by BMK_benchMem(), decompress(), decompress_file_internal(), FUZ_test(), FUZ_unitTests(), FUZZ_decompressFrame(), fuzzerTests(), local_LZ4F_decompress(), local_LZ4F_decompress_followHint(), local_LZ4F_decompress_noHint(), LZ4_compress(), LZ4_compress_default(), LZ4_compress_fast_extState_fastReset(), LZ4_compress_forceExtDict(), LZ4_compress_generic(), LZ4_compress_HC(), LZ4_compress_HC_continue(), LZ4_compress_HC_extStateHC(), LZ4_compress_HC_extStateHC_fastReset(), LZ4_compress_limitedOutput_continue(), LZ4_compress_limitedOutput_withState(), LZ4_compress_withState(), LZ4_compressBlockNoStream(), LZ4_compressBlockNoStreamHC(), LZ4_compressBlockStream(), LZ4_compressBlockStreamHC(), LZ4_compressHC(), LZ4_compressHC2(), LZ4_compressHC2_continue(), LZ4_compressHC2_limitedOutput(), LZ4_compressHC2_limitedOutput_continue(), LZ4_compressHC2_limitedOutput_withStateHC(), LZ4_compressHC2_withStateHC(), LZ4_compressHC_continue(), LZ4_compressHC_limitedOutput(), LZ4_compressHC_limitedOutput_continue(), LZ4_compressHC_limitedOutput_withStateHC(), LZ4_compressHC_withStateHC(), LZ4_decompress_generic(), LZ4F_compressBlock(), LZ4F_compressBlock_continue(), LZ4F_compressBlockHC(), LZ4F_compressBlockHC_continue(), LZ4F_compressBound(), LZ4F_compressBound_internal(), LZ4F_compressFrame(), LZ4F_compressFrame_usingCDict(), LZ4F_compressFrameBound(), LZ4F_compressUpdate(), LZ4F_decodeHeader(), LZ4F_headerSize(), LZ4F_makeBlock(), LZ4F_optimalBSID(), LZ4IO_compressFilename_Legacy(), LZ4IO_LZ4_compress(), roundTripCheck(), roundTripTest(), state_decompress(), state_extDictHCRoundTrip(), state_extDictRoundTrip(), state_prefixHCRoundTrip(), and state_prefixRoundTrip().