Line data    Source code

       1             : #pragma once
       2             : #ifndef BACKBUFFER_HPP
       3             : #define BACKBUFFER_HPP
       4             : 
       5             : /*
       6             :   Zipios -- a small C++ library that provides easy access to .zip files.
       7             : 
       8             :   Copyright (C) 2000-2007  Thomas Sondergaard
       9             :   Copyright (C) 2015-2019  Made to Order Software Corporation
      10             : 
      11             :   This library is free software; you can redistribute it and/or
      12             :   modify it under the terms of the GNU Lesser General Public
      13             :   License as published by the Free Software Foundation; either
      14             :   version 2.1 of the License, or (at your option) any later version.
      15             : 
      16             :   This library is distributed in the hope that it will be useful,
      17             :   but WITHOUT ANY WARRANTY; without even the implied warranty of
      18             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      19             :   Lesser General Public License for more details.
      20             : 
      21             :   You should have received a copy of the GNU Lesser General Public
      22             :   License along with this library; if not, write to the Free Software
      23             :   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
      24             : */
      25             : 
      26             : /** \file
      27             :  * \brief The header file for zipios::BackBuffer
      28             :  *
      29             :  * The zipios::BackBuffer class is used to read a file backward.
      30             :  */
      31             : 
      32             : #include "zipios/virtualseeker.hpp"
      33             : 
      34             : #include "zipios_common.hpp"
      35             : 
      36             : 
      37             : namespace zipios
      38             : {
      39             : 
      40             : 
      41         359 : class BackBuffer : public ::zipios::buffer_t
      42             : {
      43             : public:
      44             :                             BackBuffer(std::istream & is, VirtualSeeker const & vs = VirtualSeeker(), ssize_t const chunk_size = 1024);
      45             : 
      46             :     ssize_t                 readChunk(ssize_t & read_pointer);
      47             : 
      48             : private:
      49             :     VirtualSeeker           m_vs;
      50             :     ssize_t                 m_chunk_size;
      51             :     std::istream&           m_is;
      52             :     std::streampos          m_file_pos;
      53             : };
      54             : 
      55             : 
      56             : } // zipios namespace
      57             : 
      58             : // Local Variables:
      59             : // mode: cpp
      60             : // indent-tabs-mode: nil
      61             : // c-basic-offset: 4
      62             : // tab-width: 4
      63             : // End:
      64             : 
      65             : // vim: ts=4 sw=4 et
      66             : #endif