From 2653052944aef689484299c3f257db993dda106d Mon Sep 17 00:00:00 2001 From: midipix Date: Thu, 2 Feb 2017 22:48:07 -0500 Subject: added crc64 definitions and interfaces. --- src/hash/ntapi_tt_crc64.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/hash/ntapi_tt_crc64.c (limited to 'src/hash') diff --git a/src/hash/ntapi_tt_crc64.c b/src/hash/ntapi_tt_crc64.c new file mode 100644 index 0000000..fd76ec5 --- /dev/null +++ b/src/hash/ntapi_tt_crc64.c @@ -0,0 +1,49 @@ +/********************************************************/ +/* ntapi: Native API core library */ +/* Copyright (C) 2013--2017 Z. Gilboa */ +/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */ +/********************************************************/ + +#include +#include + +static const uint64_t crc64_table[256] = NTAPI_CRC64_TABLE; + +uint64_t __ntapi_tt_buffer_crc64( + uint64_t prev_hash, + const void * buffer, + size_t size) +{ + const unsigned char * ch; + uint64_t crc64; + + crc64 = prev_hash ^ 0xFFFFFFFFFFFFFFFF; + ch = buffer; + + for (; size; size--,ch++) + crc64 = (crc64 >> 8) ^ crc64_table[(crc64 ^ *ch) & 0xFF]; + + return (crc64 ^ 0xFFFFFFFFFFFFFFFF); +} + +uint64_t __cdecl __ntapi_tt_mbstr_crc64(const void * str) +{ + const unsigned char * ch; + uint64_t crc64; + + crc64 = 0 ^ 0xFFFFFFFFFFFFFFFF; + ch = str; + + while (*ch) { + crc64 = (crc64 >> 8) ^ crc64_table[(crc64 ^ *ch) & 0xFF]; + ch++; + } + + return (crc64 ^ 0xFFFFFFFFFFFFFFFF); +} + + +const uint64_t * __cdecl __ntapi_tt_crc64_table(void) +{ + return crc64_table; +} -- cgit v1.2.3