1 // A C++ I/O streams interface to the zlib gz* functions
3 // Written by Bernie Bright, 1998
4 // Based on zlib/contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
6 // Copyright (C) 1998 Bernie Bright - bbright@c031.aone.net.au
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 // (Log is kept at end of this file)
28 #include "zlib/zlib.h"
29 #include "Include/compiler.h"
31 #ifdef FG_HAVE_STD_INCLUDES
36 # define ios_openmode ios_base::openmode
37 # define ios_in ios_base::in
38 # define ios_out ios_base::out
39 # define ios_app ios_base::app
40 # define ios_binary ios_base::binary
42 # define ios_seekdir ios_base::seekdir
44 # define ios_badbit ios_base::badbit
45 # define ios_failbit ios_base::failbit
49 # ifdef FG_HAVE_STREAMBUF
50 # include <streambuf.h>
53 # include <iostream.h>
56 //# define ios_openmode ios::open_mode
57 # define ios_openmode int
58 # define ios_in ios::in
59 # define ios_out ios::out
60 # define ios_app ios::app
61 # define ios_binary ios::binary
63 # define ios_seekdir ios::seek_dir
65 # define ios_badbit ios::badbit
66 # define ios_failbit ios::failbit
68 // Dummy up some char traits for now.
69 template<class charT> struct char_traits{};
72 struct char_traits<char>
74 typedef char char_type;
76 typedef streampos pos_type;
77 typedef streamoff off_type;
79 static int_type eof() { return EOF; }
82 #endif // FG_HAVE_STD_INCLUDES
84 //-----------------------------------------------------------------------------
88 class gzfilebuf : public streambuf
92 #ifndef FG_HAVE_STD_INCLUDES
93 typedef char_traits<char> traits_type;
94 typedef char_traits<char>::int_type int_type;
95 typedef char_traits<char>::pos_type pos_type;
96 typedef char_traits<char>::off_type off_type;
100 virtual ~gzfilebuf();
102 gzfilebuf* open( const char* name, ios_openmode io_mode );
103 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
106 // int setcompressionlevel( int comp_level );
107 // int setcompressionstrategy( int comp_strategy );
108 bool is_open() const { return (file != NULL); }
109 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
114 virtual int_type underflow();
115 virtual int_type overflow( int_type c = traits_type::eof() );
122 // Convert io_mode to "rwab" string.
123 void cvt_iomode( char* mode_str, ios_openmode io_mode );
129 bool own_file_descriptor;
131 // Get (input) buffer.
135 static const int page_size = 4096;
139 gzfilebuf( const gzfilebuf& );
140 void operator= ( const gzfilebuf& );
143 //-----------------------------------------------------------------------------
147 struct gzifstream_base
154 #endif // _zfstream_hxx
157 // Revision 1.4 1998/11/06 14:05:16 curt
158 // More portability improvements by Bernie Bright.