55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
/*
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Copyright (c) 2013, Project OSRM, Dennis Luxen, others
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CRC32_H_
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#define CRC32_H_
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#include "../Util/SimpleLogger.h"
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#include <boost/crc.hpp> // for boost::crc_32_type
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#include <iostream>
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class CRC32 {
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private:
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unsigned crc;
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typedef boost::crc_optimal<32, 0x1EDC6F41, 0x0, 0x0, true, true> my_crc_32_type;
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typedef unsigned (CRC32::*CRC32CFunctionPtr)(char *str, unsigned len, unsigned crc);
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unsigned SoftwareBasedCRC32(char *str, unsigned len, unsigned crc);
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unsigned SSEBasedCRC32( char *str, unsigned len, unsigned crc);
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unsigned cpuid(unsigned functionInput);
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CRC32CFunctionPtr detectBestCRC32C();
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CRC32CFunctionPtr crcFunction;
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public:
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CRC32();
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unsigned operator()(char *str, unsigned len);
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virtual ~CRC32() {};
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};
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#endif /* CRC32_H_ */
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