u_hash.c File Reference

Hash functions implementation. More...

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Functions
uint32_t	util_hash_crc32 (const void *data, size_t size)
	See also: http://www.w3.org/TR/PNG/#D-CRCAppendix
Variables
static const uint32_t	util_crc32_table [256]

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Detailed Description

Hash functions implementation.

Author:

Jose Fonseca

Definition in file u_hash.c.

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Function Documentation

uint32_t util_hash_crc32	(	const void *	data,
		size_t	size
	)

See also:

http://www.w3.org/TR/PNG/#D-CRCAppendix

Definition at line 112 of file u_hash.c.

References util_crc32_table.

{
   uint8_t *p = (uint8_t *)data;
   uint32_t crc = 0xffffffff;
 
   while (size--)
      crc = util_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
   
   return crc;
}

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Variable Documentation

const uint32_t util_crc32_table[256] [static]

Definition at line 40 of file u_hash.c.

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