00001 /* +---------------------------------------------------------------------------+ 00002 | The Mobile Robot Programming Toolkit (MRPT) C++ library | 00003 | | 00004 | http://www.mrpt.org/ | 00005 | | 00006 | Copyright (C) 2005-2011 University of Malaga | 00007 | | 00008 | This software was written by the Machine Perception and Intelligent | 00009 | Robotics Lab, University of Malaga (Spain). | 00010 | Contact: Jose-Luis Blanco <jlblanco@ctima.uma.es> | 00011 | | 00012 | This file is part of the MRPT project. | 00013 | | 00014 | MRPT is free software: you can redistribute it and/or modify | 00015 | it under the terms of the GNU General Public License as published by | 00016 | the Free Software Foundation, either version 3 of the License, or | 00017 | (at your option) any later version. | 00018 | | 00019 | MRPT is distributed in the hope that it will be useful, | 00020 | but WITHOUT ANY WARRANTY; without even the implied warranty of | 00021 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 00022 | GNU General Public License for more details. | 00023 | | 00024 | You should have received a copy of the GNU General Public License | 00025 | along with MRPT. If not, see <http://www.gnu.org/licenses/>. | 00026 | | 00027 +---------------------------------------------------------------------------+ */ 00028 #ifndef CFileGZOutputStream_H 00029 #define CFileGZOutputStream_H 00030 00031 #include <mrpt/utils/CStream.h> 00032 00033 /*--------------------------------------------------------------- 00034 Class 00035 ---------------------------------------------------------------*/ 00036 namespace mrpt 00037 { 00038 namespace utils 00039 { 00040 /** Saves data to a file and transparently compress the data using the given compression level. 00041 * The generated files are in gzip format ("file.gz"). 00042 * This class requires compiling MRPT with wxWidgets. If wxWidgets is not available then the class is actually mapped to the standard CFileOutputStream 00043 * 00044 * \sa CFileOutputStream 00045 * \ingroup mrpt_base_grp 00046 */ 00047 #if !MRPT_HAS_GZ_STREAMS 00048 // We don't have wxwidgets: 00049 # define CFileGZOutputStream CFileOutputStream 00050 #else 00051 class BASE_IMPEXP CFileGZOutputStream : public CStream, public CUncopiable 00052 { 00053 protected: 00054 /** Method responsible for reading from the stream. 00055 */ 00056 size_t Read(void *Buffer, size_t Count); 00057 00058 /** Method responsible for writing to the stream. 00059 * Write attempts to write up to Count bytes to Buffer, and returns the number of bytes actually written. 00060 */ 00061 size_t Write(const void *Buffer, size_t Count); 00062 00063 // DECLARE_UNCOPIABLE( CFileGZOutputStream ) 00064 00065 private: 00066 void *m_f; 00067 00068 public: 00069 /** Constructor: opens an output file with compression level = 1 (minimum, fastest). 00070 * \param fileName The file to be open in this stream 00071 * \sa open 00072 */ 00073 CFileGZOutputStream(const std::string &fileName); 00074 00075 /** Constructor, without opening the file. 00076 * \sa open 00077 */ 00078 CFileGZOutputStream(); 00079 00080 /** Open a file for write, choosing the compression level 00081 * \param fileName The file to be open in this stream 00082 * \param compress_level 0:no compression, 1:fastest, 9:best 00083 * \return true on success, false on any error. 00084 */ 00085 bool open(const std::string &fileName, int compress_level = 1 ); 00086 00087 /** Close the file. */ 00088 void close(); 00089 00090 /** Destructor 00091 */ 00092 virtual ~CFileGZOutputStream(); 00093 00094 /** Says if file was open successfully or not. 00095 */ 00096 bool fileOpenCorrectly(); 00097 00098 /** Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one. 00099 */ 00100 uint64_t getPosition(); 00101 00102 /** This method is not implemented in this class */ 00103 uint64_t Seek(long Offset, CStream::TSeekOrigin Origin = sFromBeginning) 00104 { 00105 THROW_EXCEPTION("Seek is not implemented in this class"); 00106 } 00107 00108 /** This method is not implemented in this class */ 00109 uint64_t getTotalBytesCount() 00110 { 00111 THROW_EXCEPTION("getTotalBytesCount is not implemented in this class"); 00112 } 00113 00114 }; // End of class def. 00115 #endif 00116 00117 } // End of namespace 00118 } // end of namespace 00119 #endif
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