59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/*
|
|
* This file is part of libgim.
|
|
*
|
|
* libgim is free software: you can redistribute it and/or modify it under the
|
|
* terms of the GNU General Public License as published by the Free Software
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Copyright 2011 Danny Robson <danny@blubinc.net>
|
|
*/
|
|
|
|
#include "crc.hpp"
|
|
|
|
#include "debug.hpp"
|
|
#include "endian.hpp"
|
|
|
|
uint32_t
|
|
crc32 (const void *restrict, size_t) {
|
|
not_implemented ();
|
|
|
|
/*
|
|
const uint8_t *restrict data = static_cast<const uint8_t*> (_data);
|
|
static const uint32_t POLYNOMIAL = hton (static_cast<uint32_t>(0x04C11DB7));
|
|
|
|
uint64_t bits = 0;
|
|
unsigned int i = 0;
|
|
|
|
if (size == 0)
|
|
return POLYNOMIAL;
|
|
|
|
switch (size) {
|
|
default: bits |= static_cast<uint64_t>(data[3]) << 32U;
|
|
case 3: bits |= static_cast<uint64_t>(data[2]) << 40U;
|
|
case 2: bits |= static_cast<uint64_t>(data[1]) << 48U;
|
|
case 1: bits |= static_cast<uint64_t>(data[0]) << 56U;
|
|
}
|
|
|
|
for (size_t i = 0; i < size; ++i) {
|
|
for (unsigned j = 0; j < 32; ++j) {
|
|
bool mix = bits 0x7000000000000000ULL;
|
|
bits <<= 1;
|
|
|
|
if (mix)
|
|
bits ^= POLYNOMIAL << 32;
|
|
}
|
|
|
|
|
|
}
|
|
*/
|
|
}
|