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