00001 /*************************************************************************** 00002 ** 00003 ** This file is part of GpCoreTools. 00004 ** 00005 ** This file may be distributed and/or modified under the terms of the 00006 ** GNU General Public License version 2 or 3 as published by the Free 00007 ** Software Foundation and appearing in the file LICENSE.GPL included 00008 ** in the packaging of this file. 00009 ** 00010 ** This file is distributed in the hope that it will be useful, but WITHOUT 00011 ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00012 ** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 00013 ** more details. 00014 ** 00015 ** You should have received a copy of the GNU General Public License 00016 ** along with this program. If not, see <http://www.gnu.org/licenses/>. 00017 ** 00018 ** See http://www.geopsy.org for more information. 00019 ** 00020 ** Created: 2011-06-29 00021 ** Authors: 00022 ** Marc Wathelet (ISTerre, Grenoble, France) 00023 ** 00024 ***************************************************************************/ 00025 00026 #ifndef MESSAGECLASSID_H 00027 #define MESSAGECLASSID_H 00028 00029 #include "MessageClassIdHeader.h" 00030 00031 namespace GpCoreTools { 00032 00033 #pragma pack(1) /* set alignment to 1 byte boundary */ 00034 00035 template <class Payload> class GPCORETOOLS_EXPORT MessageClassId 00036 { 00037 public: 00038 inline MessageClassId(unsigned char msgClass, unsigned char msgId) 00039 : _head(msgClass, msgId, sizeof(Payload)), _payload(), _tail() {} 00040 inline MessageClassId(unsigned char msgClass, unsigned char msgId, const Payload& p) 00041 : _head(msgClass, msgId, sizeof(Payload)), _payload(p), _tail() {} 00042 00043 inline bool isLittleEndianValid() const; 00044 inline bool isBigEndianValid() const; 00045 00046 inline void littleEndianValues(); 00047 inline void bigEndianValues(); 00048 00049 const MessageClassIdHeader& header() const {return _head;} 00050 Payload& payload() {return _payload;} 00051 const Payload& payload() const {return _payload;} 00052 const FletcherChecksum& checksum() const {return _tail;} 00053 00054 const char * buffer() const {return reinterpret_cast<const char *>(this);} 00055 const char * payloadBuffer() const {return reinterpret_cast<const char *>(&_payload);} 00056 private: 00057 MessageClassIdHeader _head; 00058 Payload _payload; 00059 FletcherChecksum _tail; 00060 }; 00061 00062 template <class Payload> 00063 inline void MessageClassId<Payload>::littleEndianValues() 00064 { 00065 _head.littleEndianValues(); 00066 _payload.littleEndianValues(); 00067 _tail.add(reinterpret_cast<const char *>(_head.header()), MessageClassIdHeader::HeaderSize); 00068 _tail.add(reinterpret_cast<const char *>(&_payload), sizeof(Payload)); 00069 } 00070 00071 template <class Payload> 00072 inline void MessageClassId<Payload>::bigEndianValues() 00073 { 00074 _head.bigEndianValues(); 00075 _payload.bigEndianValues(); 00076 _tail.add(reinterpret_cast<const char *>(_head.header()), MessageClassIdHeader::HeaderSize); 00077 _tail.add(reinterpret_cast<const char *>(&_payload), sizeof(Payload)); 00078 } 00079 00080 template <class Payload> 00081 inline bool MessageClassId<Payload>::isLittleEndianValid() const 00082 { 00083 return _head.isValid() && 00084 _head.lengthLittleEndian()==sizeof(Payload) && 00085 _head.isValid(_tail, payloadBuffer(), sizeof(Payload)); 00086 } 00087 00088 template <class Payload> 00089 inline bool MessageClassId<Payload>::isBigEndianValid() const 00090 { 00091 return _head.isValid() && 00092 _head.lengthBigEndian()==sizeof(Payload) && 00093 _head.isValid(_tail, payloadBuffer(), sizeof(Payload)); 00094 } 00095 00096 #pragma pack() // restore original alignment 00097 00098 } // namespace GpCoreTools 00099 00100 #endif // MESSAGECLASSID_H
