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