lz4hc.c File Reference

#include "lz4hc.h"
#include "lz4.c"

Include dependency graph for lz4hc.c:

Go to the source code of this file.

Classes
struct	LZ4HC_Data_Structure
Defines
#define	DELTANEXTU16(p)   chainTable[(U16)(p)] /* faster */
#define	DICTIONARY_LOGSIZE   16
#define	HASH_FUNCTION(i)   (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
#define	HASH_LOG   (DICTIONARY_LOGSIZE-1)
#define	HASH_MASK   (HASHTABLESIZE - 1)
#define	HASHTABLESIZE   (1 << HASH_LOG)
#define	LZ4_COMMONDEFS_ONLY
#define	LZ4HC_DEBUG   0
#define	MAXD   (1<<DICTIONARY_LOGSIZE)
#define	MAXD_MASK   (MAXD - 1)
#define	OPTIMAL_ML   (int)((ML_MASK-1)+MINMATCH)
Enumerations
enum	limitedOutput_directive { notLimited = 0, limitedOutput = 1, noLimit = 0, limitedOutput = 1 }
Functions
int	LZ4_compress_HC (const char *src, char *dst, int srcSize, int maxDstSize, int compressionLevel)
int	LZ4_compress_HC_continue (LZ4_streamHC_t *LZ4_streamHCPtr, const char *source, char *dest, int inputSize, int maxOutputSize)
int	LZ4_compress_HC_extStateHC (void *state, const char *src, char *dst, int srcSize, int maxDstSize, int compressionLevel)
int	LZ4_compressHC (const char *src, char *dst, int srcSize)
int	LZ4_compressHC2 (const char *src, char *dst, int srcSize, int cLevel)
int	LZ4_compressHC2_continue (void *LZ4HC_Data, const char *source, char *dest, int inputSize, int compressionLevel)
int	LZ4_compressHC2_limitedOutput (const char *src, char *dst, int srcSize, int maxDstSize, int cLevel)
int	LZ4_compressHC2_limitedOutput_continue (void *LZ4HC_Data, const char *source, char *dest, int inputSize, int maxOutputSize, int compressionLevel)
int	LZ4_compressHC2_limitedOutput_withStateHC (void *state, const char *src, char *dst, int srcSize, int maxDstSize, int cLevel)
int	LZ4_compressHC2_withStateHC (void *state, const char *src, char *dst, int srcSize, int cLevel)
int	LZ4_compressHC_continue (LZ4_streamHC_t *ctx, const char *src, char *dst, int srcSize)
static int	LZ4_compressHC_continue_generic (LZ4HC_Data_Structure *ctxPtr, const char *source, char *dest, int inputSize, int maxOutputSize, limitedOutput_directive limit)
int	LZ4_compressHC_limitedOutput (const char *src, char *dst, int srcSize, int maxDstSize)
int	LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t *ctx, const char *src, char *dst, int srcSize, int maxDstSize)
int	LZ4_compressHC_limitedOutput_withStateHC (void *state, const char *src, char *dst, int srcSize, int maxDstSize)
int	LZ4_compressHC_withStateHC (void *state, const char *src, char *dst, int srcSize)
void *	LZ4_createHC (char *inputBuffer)
LZ4_streamHC_t *	LZ4_createStreamHC (void)
int	LZ4_freeHC (void *LZ4HC_Data)
int	LZ4_freeStreamHC (LZ4_streamHC_t *LZ4_streamHCPtr)
int	LZ4_loadDictHC (LZ4_streamHC_t *LZ4_streamHCPtr, const char *dictionary, int dictSize)
void	LZ4_resetStreamHC (LZ4_streamHC_t *LZ4_streamHCPtr, int compressionLevel)
int	LZ4_resetStreamStateHC (void *state, char *inputBuffer)
int	LZ4_saveDictHC (LZ4_streamHC_t *LZ4_streamHCPtr, char *safeBuffer, int dictSize)
int	LZ4_sizeofStateHC (void)
int	LZ4_sizeofStreamStateHC (void)
char *	LZ4_slideInputBufferHC (void *LZ4HC_Data)
static int	LZ4HC_compress_generic (void *ctxvoid, const char *source, char *dest, int inputSize, int maxOutputSize, int compressionLevel, limitedOutput_directive limit)
FORCE_INLINE int	LZ4HC_encodeSequence (const BYTE **ip, BYTE **op, const BYTE **anchor, int matchLength, const BYTE *const match, limitedOutput_directive limitedOutputBuffer, BYTE *oend)
static U32	LZ4HC_hashPtr (const void *ptr)
static void	LZ4HC_init (LZ4HC_Data_Structure *hc4, const BYTE *start)
FORCE_INLINE void	LZ4HC_Insert (LZ4HC_Data_Structure *hc4, const BYTE *ip)
FORCE_INLINE int	LZ4HC_InsertAndFindBestMatch (LZ4HC_Data_Structure *hc4, const BYTE *ip, const BYTE *const iLimit, const BYTE **matchpos, const int maxNbAttempts)
FORCE_INLINE int	LZ4HC_InsertAndGetWiderMatch (LZ4HC_Data_Structure *hc4, const BYTE *const ip, const BYTE *const iLowLimit, const BYTE *const iHighLimit, int longest, const BYTE **matchpos, const BYTE **startpos, const int maxNbAttempts)
static void	LZ4HC_setExternalDict (LZ4HC_Data_Structure *ctxPtr, const BYTE *newBlock)
Variables
static const int	g_maxCompressionLevel = 16
static const int	LZ4HC_compressionLevel_default = 9

---

Define Documentation

#define DELTANEXTU16

(

p

)

chainTable[(U16)(p)] /* faster */

Definition at line 107 of file lz4hc.c.

#define DICTIONARY_LOGSIZE   16

Definition at line 71 of file lz4hc.c.

#define HASH_FUNCTION

(

i

)

(((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))

Definition at line 105 of file lz4hc.c.

#define HASH_LOG   (DICTIONARY_LOGSIZE-1)

Definition at line 75 of file lz4hc.c.

#define HASH_MASK   (HASHTABLESIZE - 1)

Definition at line 77 of file lz4hc.c.

#define HASHTABLESIZE   (1 << HASH_LOG)

Definition at line 76 of file lz4hc.c.

#define LZ4_COMMONDEFS_ONLY

Definition at line 64 of file lz4hc.c.

#define LZ4HC_DEBUG   0

Definition at line 285 of file lz4hc.c.

#define MAXD   (1<<DICTIONARY_LOGSIZE)

Definition at line 72 of file lz4hc.c.

#define MAXD_MASK   (MAXD - 1)

Definition at line 73 of file lz4hc.c.

#define OPTIMAL_ML   (int)((ML_MASK-1)+MINMATCH)

Definition at line 79 of file lz4hc.c.

---

Enumeration Type Documentation

enum limitedOutput_directive

Enumerator:

notLimited
limitedOutput
noLimit
limitedOutput

Definition at line 283 of file lz4hc.c.

---

Function Documentation

int LZ4_compress_HC	(	const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize,
		int	compressionLevel
	)

Definition at line 550 of file lz4hc.c.

int LZ4_compress_HC_continue	(	LZ4_streamHC_t *	LZ4_streamHCPtr,
		const char *	source,
		char *	dest,
		int	inputSize,
		int	maxOutputSize
	)

Definition at line 641 of file lz4hc.c.

int LZ4_compress_HC_extStateHC	(	void *	state,
		const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize,
		int	compressionLevel
	)

Definition at line 540 of file lz4hc.c.

int LZ4_compressHC	(	const char *	src,
		char *	dst,
		int	srcSize
	)

Definition at line 677 of file lz4hc.c.

int LZ4_compressHC2	(	const char *	src,
		char *	dst,
		int	srcSize,
		int	cLevel
	)

Definition at line 679 of file lz4hc.c.

int LZ4_compressHC2_continue	(	void *	LZ4HC_Data,
		const char *	source,
		char *	dest,
		int	inputSize,
		int	compressionLevel
	)

Definition at line 716 of file lz4hc.c.

int LZ4_compressHC2_limitedOutput	(	const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize,
		int	cLevel
	)

Definition at line 680 of file lz4hc.c.

int LZ4_compressHC2_limitedOutput_continue	(	void *	LZ4HC_Data,
		const char *	source,
		char *	dest,
		int	inputSize,
		int	maxOutputSize,
		int	compressionLevel
	)

Definition at line 721 of file lz4hc.c.

int LZ4_compressHC2_limitedOutput_withStateHC	(	void *	state,
		const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize,
		int	cLevel
	)

Definition at line 684 of file lz4hc.c.

int LZ4_compressHC2_withStateHC	(	void *	state,
		const char *	src,
		char *	dst,
		int	srcSize,
		int	cLevel
	)

Definition at line 683 of file lz4hc.c.

int LZ4_compressHC_continue	(	LZ4_streamHC_t *	ctx,
		const char *	src,
		char *	dst,
		int	srcSize
	)

Definition at line 685 of file lz4hc.c.

static int LZ4_compressHC_continue_generic	(	LZ4HC_Data_Structure *	ctxPtr,
		const char *	source,
		char *	dest,
		int	inputSize,
		int	maxOutputSize,
		limitedOutput_directive	limit
	)		[static]

Definition at line 604 of file lz4hc.c.

int LZ4_compressHC_limitedOutput	(	const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize
	)

Definition at line 678 of file lz4hc.c.

int LZ4_compressHC_limitedOutput_continue	(	LZ4_streamHC_t *	ctx,
		const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize
	)

Definition at line 686 of file lz4hc.c.

int LZ4_compressHC_limitedOutput_withStateHC	(	void *	state,
		const char *	src,
		char *	dst,
		int	srcSize,
		int	maxDstSize
	)

Definition at line 682 of file lz4hc.c.

int LZ4_compressHC_withStateHC	(	void *	state,
		const char *	src,
		char *	dst,
		int	srcSize
	)

Definition at line 681 of file lz4hc.c.

void* LZ4_createHC

(

char *

inputBuffer

)

Definition at line 701 of file lz4hc.c.

LZ4_streamHC_t* LZ4_createStreamHC

(

void

)

Definition at line 562 of file lz4hc.c.

int LZ4_freeHC

(

void *

LZ4HC_Data

)

Definition at line 710 of file lz4hc.c.

int LZ4_freeStreamHC

(

LZ4_streamHC_t *

LZ4_streamHCPtr

)

Definition at line 563 of file lz4hc.c.

int LZ4_loadDictHC	(	LZ4_streamHC_t *	LZ4_streamHCPtr,
		const char *	dictionary,
		int	dictSize
	)

Definition at line 574 of file lz4hc.c.

void LZ4_resetStreamHC	(	LZ4_streamHC_t *	LZ4_streamHCPtr,
		int	compressionLevel
	)

Definition at line 567 of file lz4hc.c.

int LZ4_resetStreamStateHC	(	void *	state,
		char *	inputBuffer
	)

Definition at line 693 of file lz4hc.c.

int LZ4_saveDictHC	(	LZ4_streamHC_t *	LZ4_streamHCPtr,
		char *	safeBuffer,
		int	dictSize
	)

Definition at line 652 of file lz4hc.c.

int LZ4_sizeofStateHC

(

void

)

Definition at line 538 of file lz4hc.c.

int LZ4_sizeofStreamStateHC

(

void

)

Definition at line 691 of file lz4hc.c.

char* LZ4_slideInputBufferHC

(

void *

LZ4HC_Data

)

Definition at line 726 of file lz4hc.c.

static int LZ4HC_compress_generic	(	void *	ctxvoid,
		const char *	source,
		char *	dest,
		int	inputSize,
		int	maxOutputSize,
		int	compressionLevel,
		limitedOutput_directive	limit
	)		[static]

Definition at line 334 of file lz4hc.c.

FORCE_INLINE int LZ4HC_encodeSequence	(	const BYTE **	ip,
		BYTE **	op,
		const BYTE **	anchor,
		int	matchLength,
		const BYTE *const	match,
		limitedOutput_directive	limitedOutputBuffer,
		BYTE *	oend
	)

Definition at line 290 of file lz4hc.c.

static U32 LZ4HC_hashPtr

(

const void *

ptr

)

[static]

Definition at line 109 of file lz4hc.c.

static void LZ4HC_init	(	LZ4HC_Data_Structure *	hc4,
		const BYTE *	start
	)		[static]

Definition at line 116 of file lz4hc.c.

FORCE_INLINE void LZ4HC_Insert	(	LZ4HC_Data_Structure *	hc4,
		const BYTE *	ip
	)

Definition at line 130 of file lz4hc.c.

FORCE_INLINE int LZ4HC_InsertAndFindBestMatch	(	LZ4HC_Data_Structure *	hc4,
		const BYTE *	ip,
		const BYTE *const	iLimit,
		const BYTE **	matchpos,
		const int	maxNbAttempts
	)

Definition at line 152 of file lz4hc.c.

FORCE_INLINE int LZ4HC_InsertAndGetWiderMatch	(	LZ4HC_Data_Structure *	hc4,
		const BYTE *const	ip,
		const BYTE *const	iLowLimit,
		const BYTE *const	iHighLimit,
		int	longest,
		const BYTE **	matchpos,
		const BYTE **	startpos,
		const int	maxNbAttempts
	)

Definition at line 206 of file lz4hc.c.

static void LZ4HC_setExternalDict	(	LZ4HC_Data_Structure *	ctxPtr,
		const BYTE *	newBlock
	)		[static]

Definition at line 591 of file lz4hc.c.

---

Variable Documentation

const int g_maxCompressionLevel = 16 [static]

Definition at line 81 of file lz4hc.c.

const int LZ4HC_compressionLevel_default = 9 [static]

Definition at line 40 of file lz4hc.c.