crc32.c File Reference

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

Macros
#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_z (unsigned long crc, const unsigned char FAR *buf, z_size_t len)
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)

DO8

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

GF2_DIM

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

TBLS

#define TBLS   1

Function Documentation

crc32()

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

crc32_combine()

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

crc32_combine64()

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

crc32_combine_()

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

crc32_z()

unsigned long ZEXPORT crc32_z	(	unsigned long	crc,
		const unsigned char FAR *	buf,
		z_size_t	len )

get_crc_table()

const z_crc_t FAR *ZEXPORT get_crc_table

(

)

gf2_matrix_square()

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

gf2_matrix_times()

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

OF() [1/3]

local uLong crc32_combine_ OF

(

(uLong crc1, uLong crc2, z_off64_t len2)

)

OF() [2/3]

local unsigned long gf2_matrix_times OF

(

(unsigned long *mat, unsigned long vec)

)

OF() [3/3]

local void gf2_matrix_square OF

(

(unsigned long *square, unsigned long *mat)

)