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127 lines
4.9 KiB
C++
127 lines
4.9 KiB
C++
// ============================================================================
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// gzstream, C++ iostream classes wrapping the zlib compression library.
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// Copyright (C) 2001 Deepak Bandyopadhyay, Lutz Kettner
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// ============================================================================
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//
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// File : gzstream.h
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// Revision : $Revision: 1.5 $
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// Revision_date : $Date: 2002/04/26 23:30:15 $
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// Author(s) : Deepak Bandyopadhyay, Lutz Kettner
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//
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// Standard streambuf implementation following Nicolai Josuttis, "The
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// Standard C++ Library".
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// ============================================================================
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#ifndef GZSTREAM_H
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#define GZSTREAM_H 1
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// standard C++ with new header file names and std:: namespace
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#include <iostream>
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#include <fstream>
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// #include "/usr/include/zlib.h"
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#ifdef GZSTREAM_NAMESPACE
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namespace GZSTREAM_NAMESPACE {
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#endif
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typedef ofstream ogzstream;
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typedef ifstream igzstream;
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typedef fstream gzstream;
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typedef fstream gzstreambase;
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// // ----------------------------------------------------------------------------
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// // Internal classes to implement gzstream. See below for user classes.
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// // ----------------------------------------------------------------------------
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//
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// class gzstreambuf : public std::streambuf {
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// private:
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// static const int bufferSize = 47+256; // size of data buff
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// // totals 512 bytes under g++ for igzstream at the end.
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//
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// gzFile file; // file handle for compressed file
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// char buffer[bufferSize]; // data buffer
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// char opened; // open/close state of stream
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// int mode; // I/O mode
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//
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// int flush_buffer();
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// public:
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// gzstreambuf() : opened(0) {
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// setp( buffer, buffer + (bufferSize-1));
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// setg( buffer + 4, // beginning of putback area
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// buffer + 4, // read position
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// buffer + 4); // end position
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// // ASSERT: both input & output capabilities will not be used together
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// }
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// int is_open() { return opened; }
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// gzstreambuf* open( const char* name, int open_mode);
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// gzstreambuf* close();
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// ~gzstreambuf() { close(); }
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//
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// virtual int overflow( int c = EOF);
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// virtual int underflow();
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// virtual int sync();
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// };
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//
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// class gzstreambase : virtual public std::ios {
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// protected:
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// gzstreambuf buf;
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// public:
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// gzstreambase() { init(&buf); }
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// DLL_HEADER gzstreambase( const char* name, int open_mode);
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// DLL_HEADER ~gzstreambase();
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// void open( const char* name, int open_mode);
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// void close();
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// gzstreambuf* rdbuf() { return &buf; }
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// };
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//
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// // ----------------------------------------------------------------------------
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// // User classes. Use igzstream and ogzstream analogously to ifstream and
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// // ofstream respectively. They read and write files based on the gz*
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// // function interface of the zlib. Files are compatible with gzip compression.
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// // ----------------------------------------------------------------------------
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//
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// class DLL_HEADER igzstream : public gzstreambase, public std::istream {
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// public:
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// igzstream() : std::istream( &buf) {}
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// igzstream( const char* name, int open_mode = std::ios::in)
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// : gzstreambase( name, open_mode), std::istream( &buf) {}
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// gzstreambuf* rdbuf() { return gzstreambase::rdbuf(); }
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// void open( const char* name, int open_mode = std::ios::in) {
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// gzstreambase::open( name, open_mode);
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// }
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// };
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//
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// class DLL_HEADER ogzstream : public gzstreambase, public std::ostream {
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// public:
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// ogzstream() : std::ostream( &buf) {}
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// ogzstream( const char* name, int mode = std::ios::out)
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// : gzstreambase( name, mode), std::ostream( &buf) {}
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// gzstreambuf* rdbuf() { return gzstreambase::rdbuf(); }
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// void open( const char* name, int open_mode = std::ios::out) {
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// gzstreambase::open( name, open_mode);
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// }
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// };
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#ifdef GZSTREAM_NAMESPACE
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} // namespace GZSTREAM_NAMESPACE
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#endif
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#endif // GZSTREAM_H
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// ============================================================================
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// EOF //
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