1 //------------------------------------------------------------------------ 2 // EDGE CRC : Cyclic Rendundancy Check 3 //------------------------------------------------------------------------ 4 // 5 // Copyright (c) 2003-2008 The EDGE Team. 6 // 7 // This program is free software; you can redistribute it and/or 8 // modify it under the terms of the GNU General Public License 9 // as published by the Free Software Foundation; either version 2 10 // of the License, or (at your option) any later version. 11 // 12 // This program is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // 17 //------------------------------------------------------------------------ 18 // 19 // Based on the Adler-32 algorithm as described in RFC-1950. 20 // 21 //------------------------------------------------------------------------ 22 23 #ifndef __EPI_CRC_H__ 24 #define __EPI_CRC_H__ 25 26 namespace epi 27 { 28 class crc32_c 29 { 30 /* sealed */ 31 32 public: 33 u32_t crc; 34 crc32_c()35 crc32_c() { Reset(); } crc32_c(const crc32_c & rhs)36 crc32_c(const crc32_c &rhs) { crc = rhs.crc; } ~crc32_c()37 ~crc32_c() { } 38 39 crc32_c& operator= (const crc32_c &rhs) { crc = rhs.crc; return *this; } 40 41 crc32_c& operator+= (byte value); 42 crc32_c& operator+= (s32_t value); 43 crc32_c& operator+= (u32_t value); 44 crc32_c& operator+= (float value); 45 46 // bool operator== (const crc32_c &rhs) const { return crc == rhs.crc; } 47 // bool operator!= (const crc32_c &rhs) const { return crc != rhs.crc; } 48 49 crc32_c& AddBlock(const byte *data, int len); 50 crc32_c& AddCStr(const char *str); 51 Reset(void)52 void Reset(void) { crc = 1; } 53 }; 54 }; 55 #endif /* __EPI_CRC_H__ */ 56 57 //--- editor settings --- 58 // vi:ts=4:sw=4:noexpandtab 59