56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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