// ============================================================================
// gzstream, C++ iostream classes wrapping the zlib compression library.
// Copyright (C) 2001  Deepak Bandyopadhyay, Lutz Kettner
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// ============================================================================
//
// File          : gzstream.h
// Revision      : $Revision: 1.5 $
// Revision_date : $Date: 2002/04/26 23:30:15 $
// Author(s)     : Deepak Bandyopadhyay, Lutz Kettner
// 
// Standard streambuf implementation following Nicolai Josuttis, "The 
// Standard C++ Library".
// ============================================================================

#ifndef GZSTREAM_H
#define GZSTREAM_H 1

// standard C++ with new header file names and std:: namespace
#include <iostream>
#include <fstream>
// #include "/usr/include/zlib.h"

#ifdef GZSTREAM_NAMESPACE
namespace GZSTREAM_NAMESPACE {
#endif

    typedef ofstream ogzstream;
    typedef ifstream igzstream;
    typedef fstream gzstream;
    typedef fstream gzstreambase;

// // ----------------------------------------------------------------------------
// // Internal classes to implement gzstream. See below for user classes.
// // ----------------------------------------------------------------------------
// 
// class gzstreambuf : public std::streambuf {
// private:
//     static const int bufferSize = 47+256;    // size of data buff
//     // totals 512 bytes under g++ for igzstream at the end.
// 
//     gzFile           file;               // file handle for compressed file
//     char             buffer[bufferSize]; // data buffer
//     char             opened;             // open/close state of stream
//     int              mode;               // I/O mode
// 
//     int flush_buffer();
// public:
//     gzstreambuf() : opened(0) {
//         setp( buffer, buffer + (bufferSize-1));
//         setg( buffer + 4,     // beginning of putback area
//               buffer + 4,     // read position
//               buffer + 4);    // end position      
//         // ASSERT: both input & output capabilities will not be used together
//     }
//     int is_open() { return opened; }
//     gzstreambuf* open( const char* name, int open_mode);
//     gzstreambuf* close();
//     ~gzstreambuf() { close(); }
//     
//     virtual int     overflow( int c = EOF);
//     virtual int     underflow();
//     virtual int     sync();
// };
// 
// class gzstreambase : virtual public std::ios {
// protected:
//     gzstreambuf buf;
// public:
//     gzstreambase() { init(&buf); }
//     DLL_HEADER gzstreambase( const char* name, int open_mode);
//     DLL_HEADER ~gzstreambase();
//     void open( const char* name, int open_mode);
//     void close();
//     gzstreambuf* rdbuf() { return &buf; }
// };
// 
// // ----------------------------------------------------------------------------
// // User classes. Use igzstream and ogzstream analogously to ifstream and
// // ofstream respectively. They read and write files based on the gz* 
// // function interface of the zlib. Files are compatible with gzip compression.
// // ----------------------------------------------------------------------------
// 
// class DLL_HEADER igzstream : public gzstreambase, public std::istream {
// public:
//     igzstream() : std::istream( &buf) {} 
//     igzstream( const char* name, int open_mode = std::ios::in)
//         : gzstreambase( name, open_mode), std::istream( &buf) {}  
//     gzstreambuf* rdbuf() { return gzstreambase::rdbuf(); }
//     void open( const char* name, int open_mode = std::ios::in) {
//         gzstreambase::open( name, open_mode);
//     }
// };
// 
// class DLL_HEADER ogzstream : public gzstreambase, public std::ostream {
// public:
//     ogzstream() : std::ostream( &buf) {}
//     ogzstream( const char* name, int mode = std::ios::out)
//         : gzstreambase( name, mode), std::ostream( &buf) {}  
//     gzstreambuf* rdbuf() { return gzstreambase::rdbuf(); }
//     void open( const char* name, int open_mode = std::ios::out) {
//         gzstreambase::open( name, open_mode);
//     }
// };

#ifdef GZSTREAM_NAMESPACE
} // namespace GZSTREAM_NAMESPACE
#endif

#endif // GZSTREAM_H
// ============================================================================
// EOF //