crc32.c File Reference

#include "zutil.h"
#include "crc32.h"

Go to the source code of this file.

Macros
#define	local   static
#define	TBLS   1
#define	DO1   crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
#define	DO8   DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
#define	GF2_DIM   32 /* dimension of GF(2) vectors (length of CRC) */

Functions
local unsigned long gf2_matrix_times	OF ((unsigned long *mat, unsigned long vec))
local void gf2_matrix_square	OF ((unsigned long *square, unsigned long *mat))
local uLong crc32_combine_	OF ((uLong crc1, uLong crc2, z_off64_t len2))
const z_crc_t FAR *ZEXPORT	get_crc_table ()
unsigned long ZEXPORT	crc32 (unsigned long crc, const unsigned char FAR *buf, uInt len)
local unsigned long	gf2_matrix_times (unsigned long *mat, unsigned long vec)
local void	gf2_matrix_square (unsigned long *square, unsigned long *mat)
local uLong	crc32_combine_ (uLong crc1, uLong crc2, z_off64_t len2)
uLong ZEXPORT	crc32_combine (uLong crc1, uLong crc2, z_off_t len2)
uLong ZEXPORT	crc32_combine64 (uLong crc1, uLong crc2, z_off64_t len2)

Macro Definition Documentation

DO1

#define DO1   crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)

Definition at line 200 of file crc32.c.

Referenced by crc32().

DO8

#define DO8   DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1

Definition at line 201 of file crc32.c.

Referenced by crc32().

GF2_DIM

#define GF2_DIM   32 /* dimension of GF(2) vectors (length of CRC) */

Definition at line 324 of file crc32.c.

Referenced by crc32_combine_(), and gf2_matrix_square().

local

#define local   static

Definition at line 33 of file crc32.c.

Referenced by crc32().

TBLS

#define TBLS   1

Definition at line 46 of file crc32.c.

Function Documentation

crc32()

unsigned long ZEXPORT crc32	(	unsigned long	crc,
		const unsigned char FAR *	buf,
		uInt	len
	)

Definition at line 204 of file crc32.c.

References DO1, DO8, FAR, local, Z_NULL, and ZSWAP32.

Referenced by deflate(), deflateResetKeep(), getFileCrc(), gunpipe(), gzinit(), gztack(), inflate(), log_append(), out(), read_buf(), unzReadCurrentFile(), DotZLib.ChecksumGeneratorBase::Update(), DotZLib.CRC32Checksum::Update(), vl::VirtualFile::VirtualFile(), and zipWriteInFileInZip().

crc32_combine()

uLong ZEXPORT crc32_combine	(	uLong	crc1,
		uLong	crc2,
		z_off_t	len2
	)

Definition at line 411 of file crc32.c.

References crc32_combine_().

Referenced by gzcopy().

crc32_combine64()

uLong ZEXPORT crc32_combine64	(	uLong	crc1,
		uLong	crc2,
		z_off64_t	len2
	)

Definition at line 419 of file crc32.c.

References crc32_combine_().

crc32_combine_()

local uLong crc32_combine_	(	uLong	crc1,
		uLong	crc2,
		z_off64_t	len2
	)

Definition at line 355 of file crc32.c.

References GF2_DIM, gf2_matrix_square(), and gf2_matrix_times().

Referenced by crc32_combine(), and crc32_combine64().

get_crc_table()

const z_crc_t FAR* ZEXPORT get_crc_table

(

)

Definition at line 190 of file crc32.c.

References crc_table, and FAR.

Referenced by unzOpenCurrentFile3(), and zipOpenNewFileInZip4_64().

gf2_matrix_square()

local void gf2_matrix_square	(	unsigned long *	square,
		unsigned long *	mat
	)

Definition at line 344 of file crc32.c.

References GF2_DIM, and gf2_matrix_times().

Referenced by crc32_combine_().

gf2_matrix_times()

local unsigned long gf2_matrix_times	(	unsigned long *	mat,
		unsigned long	vec
	)

Definition at line 327 of file crc32.c.

Referenced by crc32_combine_(), and gf2_matrix_square().

OF() [1/3]

local unsigned long gf2_matrix_times OF

(

(unsigned long *mat, unsigned long vec)

)

OF() [2/3]

local void gf2_matrix_square OF

(

(unsigned long *square, unsigned long *mat)

)

OF() [3/3]

local uLong crc32_combine_ OF

(

(uLong crc1, uLong crc2, z_off64_t len2)

)