pngcrush  1.8.13
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adler32.c File Reference
#include "zutil.h"
Include dependency graph for adler32.c:

Go to the source code of this file.

Macros

#define BASE   65521U /* largest prime smaller than 65536 */
 
#define NMAX   5552
 
#define DO1(buf, i)   {adler += (buf)[i]; sum2 += adler;}
 
#define DO2(buf, i)   DO1(buf,i); DO1(buf,i+1);
 
#define DO4(buf, i)   DO2(buf,i); DO2(buf,i+2);
 
#define DO8(buf, i)   DO4(buf,i); DO4(buf,i+4);
 
#define DO16(buf)   DO8(buf,0); DO8(buf,8);
 
#define MOD(a)   a %= BASE
 
#define MOD28(a)   a %= BASE
 
#define MOD63(a)   a %= BASE
 

Functions

static uLong adler32_combine_ ()
 
uLong adler32_z (uLong adler, Bytef *buf, z_size_t len)
 
uLong adler32 (uLong adler, Bytef *buf, uInt len)
 
static uLong adler32_combine_ (uLong adler1, uLong adler2, long len2)
 
uLong adler32_combine (uLong adler1, uLong adler2, long len2)
 
uLong adler32_combine64 (uLong adler1, uLong adler2, long len2)
 

Macro Definition Documentation

◆ BASE

#define BASE   65521U /* largest prime smaller than 65536 */

Definition at line 12 of file adler32.c.

◆ DO1

#define DO1 (   buf,
 
)    {adler += (buf)[i]; sum2 += adler;}

Definition at line 16 of file adler32.c.

◆ DO16

#define DO16 (   buf)    DO8(buf,0); DO8(buf,8);

Definition at line 20 of file adler32.c.

◆ DO2

#define DO2 (   buf,
 
)    DO1(buf,i); DO1(buf,i+1);

Definition at line 17 of file adler32.c.

◆ DO4

#define DO4 (   buf,
 
)    DO2(buf,i); DO2(buf,i+2);

Definition at line 18 of file adler32.c.

◆ DO8

#define DO8 (   buf,
 
)    DO4(buf,i); DO4(buf,i+4);

Definition at line 19 of file adler32.c.

◆ MOD

#define MOD (   a)    a %= BASE

Definition at line 57 of file adler32.c.

◆ MOD28

#define MOD28 (   a)    a %= BASE

Definition at line 58 of file adler32.c.

◆ MOD63

#define MOD63 (   a)    a %= BASE

Definition at line 59 of file adler32.c.

◆ NMAX

#define NMAX   5552

Definition at line 13 of file adler32.c.

Function Documentation

◆ adler32()

uLong adler32 ( uLong  adler,
Bytef buf,
uInt  len 
)

◆ adler32_combine()

uLong adler32_combine ( uLong  adler1,
uLong  adler2,
long  len2 
)

Definition at line 172 of file adler32.c.

References adler32_combine_().

◆ adler32_combine64()

uLong adler32_combine64 ( uLong  adler1,
uLong  adler2,
long  len2 
)

Definition at line 180 of file adler32.c.

References adler32_combine_().

◆ adler32_combine_() [1/2]

static uLong adler32_combine_ ( )
static

◆ adler32_combine_() [2/2]

static uLong adler32_combine_ ( uLong  adler1,
uLong  adler2,
long  len2 
)
static

Definition at line 143 of file adler32.c.

References BASE, MOD, and MOD63.

◆ adler32_z()

uLong adler32_z ( uLong  adler,
Bytef buf,
z_size_t  len 
)

Definition at line 63 of file adler32.c.

References adler, BASE, DO16, MOD, MOD28, NMAX, and Z_NULL.

Referenced by adler32().