Mercurial > hg > toybox
diff lib/lib.c @ 337:aaafa1ceaa91
Add -N, -I, -L, and -P options to cksum.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Mon, 05 Jan 2009 01:05:43 -0600 |
| parents | 83c461db9df7 |
| children | 6e03d6a8df23 |
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--- a/lib/lib.c Sun Jan 04 22:45:03 2009 -0600 +++ b/lib/lib.c Mon Jan 05 01:05:43 2009 -0600 @@ -721,15 +721,16 @@ // Create a 256 entry CRC32 lookup table. -void crc_init(unsigned int *crc_table) +void crc_init(unsigned int *crc_table, int little_endian) { unsigned int i; // Init the CRC32 table (big endian) for (i=0; i<256; i++) { - unsigned int j, c = i<<24; + unsigned int j, c = little_endian ? i : i<<24; for (j=8; j; j--) - c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1); + if (little_endian) c = (c&1) ? (c>>1)^0xEDB88320 : c>>1; + else c=c&0x80000000 ? (c<<1)^0x04c11db7 : (c<<1); crc_table[i] = c; } }