crc32.c File Reference

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

Go to the source code of this file.

Defines
#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
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))
const unsigned long FAR *ZEXPORT	get_crc_table ()
unsigned long ZEXPORT	crc32 (unsigned long crc, const unsigned char FAR *buf, unsigned len)
local unsigned long	gf2_matrix_times (unsigned long *mat, unsigned long vec)
local void	gf2_matrix_square (unsigned long *square, unsigned long *mat)
uLong ZEXPORT	crc32_combine (uLong crc1, uLong crc2, z_off_t len2)

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Define Documentation

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

Definition at line 215 of file crc32.c.

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

Definition at line 216 of file crc32.c.

#define GF2_DIM   32

Definition at line 339 of file crc32.c. Referenced by crc32_combine(), and gf2_matrix_square().

#define local   static

Definition at line 31 of file crc32.c.

#define TBLS   1

Definition at line 64 of file crc32.c.

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Function Documentation

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

Definition at line 219 of file crc32.c. References DO1, DO8, and Z_NULL. Referenced by deflate(), deflateReset(), inflate(), and read_buf().

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

Definition at line 370 of file crc32.c. References GF2_DIM, gf2_matrix_square(), and gf2_matrix_times().

const unsigned long FAR* ZEXPORT get_crc_table (   )

Definition at line 205 of file crc32.c.

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

Definition at line 359 of file crc32.c. References GF2_DIM, and gf2_matrix_times(). Referenced by crc32_combine().

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

Definition at line 342 of file crc32.c. Referenced by crc32_combine(), and gf2_matrix_square().

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

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

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