raze-gles/polymer/eduke32/build/include/crc32.h

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#ifndef __crc32_h__
#define __crc32_h__
#include "compat.h"
#ifdef EXTERNC
extern "C" {
#endif
extern uint32_t crc32table[256];
void initcrc32table(void);
uint32_t crc32once(uint8_t *blk, uint32_t len);
static inline void crc32init(uint32_t *crcvar)
{
if (!crcvar) return;
*crcvar = 0xffffffffl;
}
static inline void crc32block(uint32_t *crcvar, uint8_t *blk, uint32_t len)
{
uint32_t crc = *crcvar;
while (len--) crc = crc32table[(crc ^ *(blk++)) & 0xffl] ^(crc >> 8);
*crcvar = crc;
}
static inline uint32_t crc32finish(uint32_t *crcvar)
{
*crcvar = *crcvar ^ 0xffffffffl;
return *crcvar;
}
#ifdef EXTERNC
}
#endif
#endif