raze-gles/polymer/eduke32/build/src/crc32.c

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#include "crc32.h"
uint32_t crc32table[256];
void initcrc32table(void)
{
uint32_t i,j,k;
// algorithm and polynomial same as that used by infozip's zip
for (i=0; i<256; i++)
{
j = i;
for (k=8; k; k--)
j = (j&1) ? (0xedb88320L^(j>>1)) : (j>>1);
crc32table[i] = j;
}
}
uint32_t crc32once(uint8_t *blk, uint32_t len)
{
uint32_t crc;
crc32init(&crc);
crc32block(&crc, blk, len);
return crc32finish(&crc);
}