zstdseek_decompress.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <assert.h>
#include "xxhash.h"
#include "zstd.h"
#include "zstd_errors.h"
#include "mem.h"
#include "zstd_seekable.h"

Data Structures
struct	buffWrapper_t
struct	seekEntry_t
struct	ZSTD_seekTable_s
struct	ZSTD_seekable_s

Macros
#define	_FILE_OFFSET_BITS   64 /* turn off_t into a 64-bit type for ftello, fseeko */
#define	_LARGEFILE_SOURCE   1 /* Large File Support extension (LFS) - fseeko, ftello */
#define	LONG_SEEK   fseek
#define	XXH_STATIC_LINKING_ONLY
#define	ZSTD_STATIC_LINKING_ONLY
#define	ERROR(name)
#define	CHECK_IO(f)
#define	MIN(a, b)
#define	MAX(a, b)
#define	ZSTD_SEEKABLE_NO_OUTPUT_PROGRESS_MAX   16
#define	SEEKABLE_BUFF_SIZE   ZSTD_BLOCKSIZE_MAX

Functions
ZSTD_seekable *	ZSTD_seekable_create (void)
size_t	ZSTD_seekable_free (ZSTD_seekable *zs)
ZSTD_seekTable *	ZSTD_seekTable_create_fromSeekable (const ZSTD_seekable *zs)
size_t	ZSTD_seekTable_free (ZSTD_seekTable *st)
unsigned	ZSTD_seekable_offsetToFrameIndex (const ZSTD_seekable *zs, unsigned long long pos)
unsigned	ZSTD_seekTable_offsetToFrameIndex (const ZSTD_seekTable *st, unsigned long long pos)
unsigned	ZSTD_seekable_getNumFrames (const ZSTD_seekable *zs)
unsigned	ZSTD_seekTable_getNumFrames (const ZSTD_seekTable *st)
unsigned long long	ZSTD_seekable_getFrameCompressedOffset (const ZSTD_seekable *zs, unsigned frameIndex)
unsigned long long	ZSTD_seekTable_getFrameCompressedOffset (const ZSTD_seekTable *st, unsigned frameIndex)
unsigned long long	ZSTD_seekable_getFrameDecompressedOffset (const ZSTD_seekable *zs, unsigned frameIndex)
unsigned long long	ZSTD_seekTable_getFrameDecompressedOffset (const ZSTD_seekTable *st, unsigned frameIndex)
size_t	ZSTD_seekable_getFrameCompressedSize (const ZSTD_seekable *zs, unsigned frameIndex)
size_t	ZSTD_seekTable_getFrameCompressedSize (const ZSTD_seekTable *st, unsigned frameIndex)
size_t	ZSTD_seekable_getFrameDecompressedSize (const ZSTD_seekable *zs, unsigned frameIndex)
size_t	ZSTD_seekTable_getFrameDecompressedSize (const ZSTD_seekTable *st, unsigned frameIndex)
size_t	ZSTD_seekable_initBuff (ZSTD_seekable *zs, const void *src, size_t srcSize)
size_t	ZSTD_seekable_initFile (ZSTD_seekable *zs, FILE *src)
size_t	ZSTD_seekable_initAdvanced (ZSTD_seekable *zs, ZSTD_seekable_customFile src)
size_t	ZSTD_seekable_decompress (ZSTD_seekable *zs, void *dst, size_t len, unsigned long long offset)
size_t	ZSTD_seekable_decompressFrame (ZSTD_seekable *zs, void *dst, size_t dstSize, unsigned frameIndex)

Macro Definition Documentation

_FILE_OFFSET_BITS

#define _FILE_OFFSET_BITS   64 /* turn off_t into a 64-bit type for ftello, fseeko */

_LARGEFILE_SOURCE

#define _LARGEFILE_SOURCE   1 /* Large File Support extension (LFS) - fseeko, ftello */

CHECK_IO

#define CHECK_IO

(

f

)

Value:

{ int const errcod = (f); if (errcod < 0) return ERROR(seekableIO); }

ERROR

#define ERROR

(

name

)

Value:

((size_t)-ZSTD_error_##name)

LONG_SEEK

#define LONG_SEEK   fseek

MAX

#define MAX	(		a,
			b )

Value:

((a) > (b) ? (a) : (b))

MIN

#define MIN	(		a,
			b )

Value:

((a) < (b) ? (a) : (b))

SEEKABLE_BUFF_SIZE

#define SEEKABLE_BUFF_SIZE   ZSTD_BLOCKSIZE_MAX

XXH_STATIC_LINKING_ONLY

#define XXH_STATIC_LINKING_ONLY

ZSTD_SEEKABLE_NO_OUTPUT_PROGRESS_MAX

#define ZSTD_SEEKABLE_NO_OUTPUT_PROGRESS_MAX   16

ZSTD_STATIC_LINKING_ONLY

#define ZSTD_STATIC_LINKING_ONLY

Function Documentation

ZSTD_seekable_create()

ZSTD_seekable * ZSTD_seekable_create

(

void

)

ZSTD_seekable_decompress()

size_t ZSTD_seekable_decompress	(	ZSTD_seekable *	zs,
		void *	dst,
		size_t	len,
		unsigned long long	offset )

ZSTD_seekable_decompressFrame()

size_t ZSTD_seekable_decompressFrame	(	ZSTD_seekable *	zs,
		void *	dst,
		size_t	dstSize,
		unsigned	frameIndex )

ZSTD_seekable_free()

size_t ZSTD_seekable_free

(

ZSTD_seekable *

zs

)

ZSTD_seekable_getFrameCompressedOffset()

unsigned long long ZSTD_seekable_getFrameCompressedOffset	(	const ZSTD_seekable *	zs,
		unsigned	frameIndex )

ZSTD_seekable_getFrameCompressedSize()

size_t ZSTD_seekable_getFrameCompressedSize	(	const ZSTD_seekable *	zs,
		unsigned	frameIndex )

ZSTD_seekable_getFrameDecompressedOffset()

unsigned long long ZSTD_seekable_getFrameDecompressedOffset	(	const ZSTD_seekable *	zs,
		unsigned	frameIndex )

ZSTD_seekable_getFrameDecompressedSize()

size_t ZSTD_seekable_getFrameDecompressedSize	(	const ZSTD_seekable *	zs,
		unsigned	frameIndex )

ZSTD_seekable_getNumFrames()

unsigned ZSTD_seekable_getNumFrames

(

const ZSTD_seekable *

zs

)

ZSTD_seekable_initAdvanced()

size_t ZSTD_seekable_initAdvanced	(	ZSTD_seekable *	zs,
		ZSTD_seekable_customFile	src )

ZSTD_seekable_initBuff()

size_t ZSTD_seekable_initBuff	(	ZSTD_seekable *	zs,
		const void *	src,
		size_t	srcSize )

ZSTD_seekable_initFile()

size_t ZSTD_seekable_initFile	(	ZSTD_seekable *	zs,
		FILE *	src )

ZSTD_seekable_offsetToFrameIndex()

unsigned ZSTD_seekable_offsetToFrameIndex	(	const ZSTD_seekable *	zs,
		unsigned long long	pos )

ZSTD_seekable_offsetToFrameIndex() : Performs a binary search to find the last frame with a decompressed offset <= pos

Returns

: the frame's index

ZSTD_seekTable_create_fromSeekable()

ZSTD_seekTable * ZSTD_seekTable_create_fromSeekable

(

const ZSTD_seekable *

zs

)

ZSTD_seekTable_free()

size_t ZSTD_seekTable_free

(

ZSTD_seekTable *

st

)

ZSTD_seekTable_getFrameCompressedOffset()

unsigned long long ZSTD_seekTable_getFrameCompressedOffset	(	const ZSTD_seekTable *	st,
		unsigned	frameIndex )

ZSTD_seekTable_getFrameCompressedSize()

size_t ZSTD_seekTable_getFrameCompressedSize	(	const ZSTD_seekTable *	st,
		unsigned	frameIndex )

ZSTD_seekTable_getFrameDecompressedOffset()

unsigned long long ZSTD_seekTable_getFrameDecompressedOffset	(	const ZSTD_seekTable *	st,
		unsigned	frameIndex )

ZSTD_seekTable_getFrameDecompressedSize()

size_t ZSTD_seekTable_getFrameDecompressedSize	(	const ZSTD_seekTable *	st,
		unsigned	frameIndex )

ZSTD_seekTable_getNumFrames()

unsigned ZSTD_seekTable_getNumFrames

(

const ZSTD_seekTable *

st

)

ZSTD_seekTable_offsetToFrameIndex()

unsigned ZSTD_seekTable_offsetToFrameIndex	(	const ZSTD_seekTable *	st,
		unsigned long long	pos )