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.
27 #include "zlib/zlib.h"
28 #include "Include/compiler.h"
30 #ifdef FG_HAVE_STD_INCLUDES
35 # define ios_openmode ios_base::openmode
36 # define ios_in ios_base::in
37 # define ios_out ios_base::out
38 # define ios_app ios_base::app
39 # define ios_binary ios_base::binary
41 # define ios_seekdir ios_base::seekdir
43 # define ios_badbit ios_base::badbit
44 # define ios_failbit ios_base::failbit
46 FG_USING_STD(streambuf);
47 FG_USING_STD(ios_base);
48 FG_USING_STD(streampos);
49 FG_USING_STD(streamoff);
53 # ifdef FG_HAVE_STREAMBUF
54 # include <streambuf.h>
57 # include <iostream.h>
60 //# define ios_openmode ios::open_mode
61 # define ios_openmode int
62 # define ios_in ios::in
63 # define ios_out ios::out
64 # define ios_app ios::app
66 #if defined(__GNUC__) && __GNUC_MINOR__ < 8
67 # define ios_binary ios::bin
68 #elif defined( FG_HAVE_NATIVE_SGI_COMPILERS )
71 # define ios_binary ios::binary
74 # define ios_seekdir ios::seek_dir
76 # define ios_badbit ios::badbit
77 # define ios_failbit ios::failbit
79 # include "Include/fg_traits.hxx"
81 #endif // FG_HAVE_STD_INCLUDES
83 //-----------------------------------------------------------------------------
87 class gzfilebuf : public streambuf
91 #ifndef FG_HAVE_STD_INCLUDES
92 typedef char_traits<char> traits_type;
93 typedef char_traits<char>::int_type int_type;
94 typedef char_traits<char>::pos_type pos_type;
95 typedef char_traits<char>::off_type off_type;
101 gzfilebuf* open( const char* name, ios_openmode io_mode );
102 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
105 // int setcompressionlevel( int comp_level );
106 // int setcompressionstrategy( int comp_strategy );
107 bool is_open() const { return (file != NULL); }
108 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
113 virtual int_type underflow();
114 virtual int_type overflow( int_type c = traits_type::eof() );
121 // Convert io_mode to "rwab" string.
122 void cvt_iomode( char* mode_str, ios_openmode io_mode );
128 bool own_file_descriptor;
130 // Get (input) buffer.
134 enum { page_size = 4096 };
138 gzfilebuf( const gzfilebuf& );
139 void operator= ( const gzfilebuf& );
142 //-----------------------------------------------------------------------------
146 struct gzifstream_base
153 #endif // _zfstream_hxx