25 namespace crc32_nibblem {
32 static const crc_t crc_table[16] = {
33 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
34 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
38 crc_t crc_update(
crc_t crc,
const void *data,
size_t data_len)
40 const unsigned char *d = (
const unsigned char *)data;
45 crc = crc_table[tbl_idx & 0x0f] ^ (crc >> 4);
46 tbl_idx = crc ^ (*d >> 4);
47 crc = crc_table[tbl_idx & 0x0f] ^ (crc >> 4);
50 return crc & 0xffffffff;