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: 2011-05-30 00021 ** Authors: 00022 ** Marc Wathelet (ISTerre, Grenoble, France) 00023 ** 00024 ***************************************************************************/ 00025 00026 #ifndef BYTEORDER_H 00027 #define BYTEORDER_H 00028 00029 #include "GpCoreToolsDLLExport.h" 00030 00031 // 00032 // Can be BIG_ENDIAN or LITTLE_ENDIAN, set with -D option in gcc command line 00033 // 00034 #ifndef BYTE_ORDER 00035 # define BYTE_ORDER LITTLE_ENDIAN 00036 #endif 00037 00038 namespace GpCoreTools { 00039 00040 class GPCORETOOLS_EXPORT ByteOrder 00041 { 00042 public: 00043 static inline int bigEndianToNative(int v); 00044 static inline int littleEndianToNative(int v); 00045 00046 static inline short bigEndianToNative(const unsigned short& v); 00047 static inline short littleEndianToNative(const unsigned short& v); 00048 00049 static int swap(int v); 00050 static short swap(const unsigned short& v); 00051 static inline void swap(char& v1, char& v2); 00052 static inline void swap(unsigned char& v1, unsigned char& v2); 00053 static inline void swap(char * v); 00054 static inline void swap(unsigned char * v); 00055 }; 00056 00057 inline int ByteOrder::bigEndianToNative(int v) 00058 { 00059 #if BYTE_ORDER == LITTLE_ENDIAN 00060 return swap(v); 00061 #else 00062 return v; 00063 #endif 00064 } 00065 00066 inline int ByteOrder::littleEndianToNative(int v) 00067 { 00068 #if BYTE_ORDER == BIG_ENDIAN 00069 return swap(v); 00070 #else 00071 return v; 00072 #endif 00073 } 00074 00075 inline short ByteOrder::bigEndianToNative(const unsigned short& v) 00076 { 00077 #if BYTE_ORDER == LITTLE_ENDIAN 00078 return swap(v); 00079 #else 00080 return v; 00081 #endif 00082 } 00083 00084 inline short ByteOrder::littleEndianToNative(const unsigned short& v) 00085 { 00086 #if BYTE_ORDER == BIG_ENDIAN 00087 return swap(v); 00088 #else 00089 return v; 00090 #endif 00091 } 00092 00093 inline void ByteOrder::swap(char& v1, char& v2) 00094 { 00095 char tmp=v1; 00096 v1=v2; 00097 v2=tmp; 00098 } 00099 00100 inline void ByteOrder::swap(unsigned char& v1, unsigned char& v2) 00101 { 00102 char tmp=v1; 00103 v1=v2; 00104 v2=tmp; 00105 } 00106 00107 inline void ByteOrder::swap(char * v) 00108 { 00109 swap(v[0], v[3]); 00110 swap(v[1], v[2]); 00111 } 00112 00113 inline void ByteOrder::swap(unsigned char * v) 00114 { 00115 swap(v[0], v[3]); 00116 swap(v[1], v[2]); 00117 } 00118 00119 } // namespace GpCoreTools 00120 00121 #endif // BYTEORDER_H
