00001 /*************************************************************************** 00002 ** 00003 ** This file is part of QGpCoreTools. 00004 ** 00005 ** This library is free software; you can redistribute it and/or 00006 ** modify it under the terms of the GNU Lesser General Public 00007 ** License as published by the Free Software Foundation; either 00008 ** version 2.1 of the License, or (at your option) any later version. 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 Lesser General Public 00013 ** License for more details. 00014 ** 00015 ** You should have received a copy of the GNU Lesser General Public 00016 ** License along with this library; if not, write to the Free Software 00017 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00018 ** 00019 ** See http://www.geopsy.org for more information. 00020 ** 00021 ** Created : 2006-11-10 00022 ** Authors : 00023 ** Marc Wathelet 00024 ** Marc Wathelet (LGIT, Grenoble, France) 00025 ** 00026 ***************************************************************************/ 00027 00028 #ifndef TAR_H 00029 #define TAR_H 00030 00031 #include <zlib.h> 00032 00033 #include "QGpCoreToolsDLLExport.h" 00034 #include "Translations.h" 00035 #include "CoreApplication.h" 00036 #include "Trace.h" 00037 00038 namespace QGpCoreTools { 00039 00040 class TarHeader; 00041 00042 class QGPCORETOOLS_EXPORT Tar 00043 { 00044 TRANSLATIONS("Tar") 00045 public: 00046 Tar(); 00047 ~Tar(); 00048 00049 bool open(QString file, QIODevice::OpenMode m); 00050 void close(); 00051 QString fileName() const {return _fileName;} 00052 00053 bool addFile(QString fileName, const QByteArray& data); 00054 bool nextFile(QString& fileName, QByteArray& data, bool cache=false ); 00055 bool file(const QString fileName, QByteArray& data); 00056 bool rewind(); 00057 private: 00058 inline bool writeBlock(const char * buffer); 00059 inline bool readBlock(char * buffer); 00060 char * int2octal(int val); 00061 int octal2int(const char * octStr); 00062 uint checksum(TarHeader& fh); 00063 bool readFile(TarHeader& fh, QByteArray& data); 00064 00065 gzFile _f; 00066 QString _fileName; 00067 QIODevice::OpenMode _mode; 00068 QCache<QString, QByteArray> _cachedFiles; 00069 QMap<QString, z_off_t> _fileOffsets; 00070 }; 00071 00072 inline bool Tar::writeBlock(const char * buffer) 00073 { 00074 TRACE; 00075 // To ensure compatibility with old zlib releases (void *) is requested. 00076 if(gzwrite (_f, (void *) buffer, 512)!=512) { 00077 App::stream() << tr("Cannot write block in tar file") << endl; 00078 return false; 00079 } else { 00080 return true; 00081 } 00082 } 00083 00084 inline bool Tar::readBlock(char * buffer) 00085 { 00086 TRACE; 00087 int nb=gzread (_f, buffer, 512); 00088 if(nb!=512) { 00089 App::stream() << tr("Cannot read a block of 512 bytes in tar file") << endl; 00090 return false; 00091 } else { 00092 return true; 00093 } 00094 } 00095 00096 } // namespace QGpCoreTools 00097 00098 #endif // TAR_H
