1 ///////////////////////////////////////////////////////////////////////////////
3 /// \file crc64_small.c
4 /// \brief CRC64 calculation (size-optimized)
6 // Author: Lasse Collin
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
11 ///////////////////////////////////////////////////////////////////////////////
16 static uint64_t crc64_table[256];
22 static const uint64_t poly64 = UINT64_C(0xC96C5795D7870F42);
24 for (size_t b = 0; b < 256; ++b) {
26 for (size_t i = 0; i < 8; ++i) {
28 r = (r >> 1) ^ poly64;
40 extern LZMA_API(uint64_t)
41 lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc)
43 mythread_once(crc64_init);
48 crc = crc64_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);