chunked_file.h
Go to the documentation of this file.
00001 /*********************************************************************
00002 * Software License Agreement (BSD License)
00003 *
00004 *  Copyright (c) 2008, Willow Garage, Inc.
00005 *  All rights reserved.
00006 *
00007 *  Redistribution and use in source and binary forms, with or without
00008 *  modification, are permitted provided that the following conditions
00009 *  are met:
00010 *
00011 *   * Redistributions of source code must retain the above copyright
00012 *     notice, this list of conditions and the following disclaimer.
00013 *   * Redistributions in binary form must reproduce the above
00014 *     copyright notice, this list of conditions and the following
00015 *     disclaimer in the documentation and/or other materials provided
00016 *     with the distribution.
00017 *   * Neither the name of Willow Garage, Inc. nor the names of its
00018 *     contributors may be used to endorse or promote products derived
00019 *     from this software without specific prior written permission.
00020 *
00021 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00022 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00023 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00024 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
00025 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00026 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00027 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00028 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00029 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00030 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
00031 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00032 *  POSSIBILITY OF SUCH DAMAGE.
00033 ********************************************************************/
00034 
00035 #ifndef ROSBAG_CHUNKED_FILE_H
00036 #define ROSBAG_CHUNKED_FILE_H
00037 
00038 #include <ios>
00039 #include <stdint.h>
00040 #include <string>
00041 #include "macros.h"
00042 #include <boost/shared_ptr.hpp>
00043 
00044 #include <bzlib.h>
00045 
00046 #include "rosbag/stream.h"
00047 
00048 namespace rosbag {
00049 
00051 class ROSBAG_DECL ChunkedFile
00052 {
00053     friend class Stream;
00054 
00055 public:
00056     ChunkedFile();
00057     ~ChunkedFile();
00058 
00059     void openWrite    (std::string const& filename);            
00060     void openRead     (std::string const& filename);            
00061     void openReadWrite(std::string const& filename);            
00062 
00063     void close();                                               
00064 
00065     std::string getFileName()          const;                   
00066     uint64_t    getOffset()            const;                   
00067     uint32_t    getCompressedBytesIn() const;                   
00068     bool        isOpen()               const;                   
00069     bool        good()                 const;                   
00070 
00071     void        setReadMode(CompressionType type);
00072     void        setWriteMode(CompressionType type);
00073 
00074     // File I/O
00075     void        write(std::string const& s);
00076     void        write(void* ptr, size_t size);                          
00077     void        read(void* ptr, size_t size);                           
00078     std::string getline();
00079     bool        truncate(uint64_t length);
00080     void        seek(uint64_t offset, int origin = std::ios_base::beg); 
00081     void        decompress(CompressionType compression, uint8_t* dest, unsigned int dest_len, uint8_t* source, unsigned int source_len);
00082 
00083 private:
00084     void open(std::string const& filename, std::string const& mode);
00085     void clearUnused();
00086 
00087 private:
00088     std::string filename_;       
00089     FILE*       file_;           
00090     uint64_t    offset_;         
00091     uint64_t    compressed_in_;  
00092     char*       unused_;         
00093     int         nUnused_;        
00094 
00095     boost::shared_ptr<StreamFactory> stream_factory_;
00096 
00097     boost::shared_ptr<Stream> read_stream_;
00098     boost::shared_ptr<Stream> write_stream_;
00099 };
00100 
00101 } // namespace rosbag
00102 
00103 #endif


rosbag_storage
Author(s):
autogenerated on Thu Jun 6 2019 21:09:52