46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
/*
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open source routing machine
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Copyright (C) Dennis Luxen, others 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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#ifndef CRC32_H_
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#define CRC32_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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