FryingPan/framework/Generic/SumCRC.h

   1 /*
   2  * Amiga Generic Set - set of libraries and includes to ease sw development for all Amiga platforms
   3  * Copyright (C) 2001-2011 Tomasz Wiszkowski Tomasz.Wiszkowski at gmail.com.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifndef _GENERIC_SUMCRC_H_
  21 #define _GENERIC_SUMCRC_H_
  22
  23 #include "Types.h"
  24
  25 namespace GenNS
  26 {
  27    class SumCRC
  28    {
  29    public:
  30       enum Polynominals
  31       {
  32          CRC_16_CCITT,        // x^16 + x^12 + x^5 + 1
  33          CRC_16_IBM,          // x^16 + x^15 + x^2 + 1
  34          CRC_32_MPEG2,        // x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1
  35          CRC_32_IEEE,         // as above
  36          CRC_32_Castagnoli,   // x^32 + x^28 + x^27 + x^26 + x^25 + x^23 + x^22 + x^20 + x^19 + x^18 + x^14 + x^13 + x^11 + x^10 + x^9 + x^8 + x^6 + 1
  37          CRC_64_ISO,          // x^64 + x^4 + x^3
  38          CRC_64_ECMA,         // no way.
  39       };
  40
  41    protected:
  42       uint64         crc;
  43       uint64         lastWord;
  44
  45       int8           polySize;
  46       uint64         polyWord;
  47    protected:
  48       void           setPoly(uint64 poly, int8 size);
  49
  50    public:
  51       SumCRC(Polynominals poly);
  52       SumCRC(uint64 poly, int8 size);
  53       virtual       ~SumCRC();
  54
  55       virtual void   Initialize();
  56       virtual void   Update(const uint8 *, uint32);
  57       virtual void   Finalize();
  58
  59       virtual uint64 GetSum();
  60    };
  61 };
  62
  63 #endif
  64