csutil/checksum.h
00001 /* 00002 Copyright (C) 2009-2011 by Frank Richter 00003 00004 This library is free software; you can redistribute it and/or 00005 modify it under the terms of the GNU Library General Public 00006 License as published by the Free Software Foundation; either 00007 version 2 of the License, or (at your option) any later version. 00008 00009 This library is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 Library General Public License for more details. 00013 00014 You should have received a copy of the GNU Library General Public 00015 License along with this library; if not, write to the Free 00016 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00017 */ 00018 00019 #ifndef __CS_CSUTIL_CHECKSUM_H__ 00020 #define __CS_CSUTIL_CHECKSUM_H__ 00021 00022 #include "csextern.h" 00023 #include "iutil/databuff.h" 00024 00025 namespace CS 00026 { 00027 namespace Utility 00028 { 00029 namespace Checksum 00030 { 00052 class Adler32 00053 { 00054 static inline uint32 Initial() { return 1; } 00055 static CS_CRYSTALSPACE_EXPORT uint32 Compute (uint32 prevCheckSum, 00056 const void* data, size_t size); 00057 00058 uint32 checksum; 00059 00060 public: 00061 Adler32 () : checksum (Initial()) {} 00062 00064 00065 Adler32 (const void* data, size_t size) : checksum (Compute (Initial(), data, size)) {} 00066 Adler32 (iDataBuffer* data) 00067 : checksum (Compute (Initial(), data->GetData(), data->GetSize())) {} 00069 00071 00076 Adler32 (uint32 prevCheckSum, const void* data, size_t size) 00077 : checksum (Compute (prevCheckSum, data, size)) {} 00078 Adler32 (uint32 prevCheckSum, iDataBuffer* data) 00079 : checksum (Compute (prevCheckSum, data->GetData(), data->GetSize())) {} 00081 00083 void Append (const uint8* data, size_t size) 00084 { checksum = Compute (checksum, data, size); } 00086 uint32 Finish () 00087 { return checksum; } 00088 00090 operator uint32() const 00091 { return checksum; } 00092 }; 00093 00115 class CRC32 00116 { 00117 static inline uint32 Initial() { return 0; } 00118 static CS_CRYSTALSPACE_EXPORT uint32 Compute (uint32 prevCheckSum, 00119 const void* data, size_t size); 00120 00121 uint32 checksum; 00122 00123 public: 00124 CRC32 () : checksum (Initial()) {} 00125 00127 00128 CRC32 (const void* data, size_t size) : checksum (Compute (Initial(), data, size)) {} 00129 CRC32 (iDataBuffer* data) 00130 : checksum (Compute (Initial(), data->GetData(), data->GetSize())) {} 00132 00134 00139 CRC32 (uint32 prevCheckSum, const void* data, size_t size) 00140 : checksum (Compute (prevCheckSum, data, size)) {} 00141 CRC32 (uint32 prevCheckSum, iDataBuffer* data) 00142 : checksum (Compute (prevCheckSum, data->GetData(), data->GetSize())) {} 00144 00146 void Append (const uint8* data, size_t size) 00147 { checksum = Compute (checksum, data, size); } 00149 uint32 Finish () 00150 { return checksum; } 00151 00153 operator uint32() const 00154 { return checksum; } 00155 }; 00156 00157 } // namespace Checksum 00158 } // namespace Utility 00159 } // namespace CS 00160 00161 #endif // __CS_CSUTIL_CHECKSUM_H__
Generated for Crystal Space 2.0 by doxygen 1.6.1