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.
31 #include <simgear/compiler.h>
36 # include <simgear/zlib/zlib.h>
39 #ifdef FG_HAVE_STD_INCLUDES
44 # define ios_openmode ios_base::openmode
45 # define ios_in ios_base::in
46 # define ios_out ios_base::out
47 # define ios_app ios_base::app
48 # define ios_binary ios_base::binary
50 # define ios_seekdir ios_base::seekdir
52 # define ios_badbit ios_base::badbit
53 # define ios_failbit ios_base::failbit
55 FG_USING_STD(streambuf);
56 FG_USING_STD(ios_base);
57 FG_USING_STD(streampos);
58 FG_USING_STD(streamoff);
62 # ifdef FG_HAVE_STREAMBUF
63 # include <streambuf.h>
66 # include <iostream.h>
69 //# define ios_openmode ios::open_mode
70 # define ios_openmode int
71 # define ios_in ios::in
72 # define ios_out ios::out
73 # define ios_app ios::app
75 #if defined(__GNUC__) && __GNUC_MINOR__ < 8
76 # define ios_binary ios::bin
77 #elif defined( FG_HAVE_NATIVE_SGI_COMPILERS )
80 # define ios_binary ios::binary
83 # define ios_seekdir ios::seek_dir
85 # define ios_badbit ios::badbit
86 # define ios_failbit ios::failbit
88 # include <simgear/fg_traits.hxx>
90 #endif // FG_HAVE_STD_INCLUDES
92 //-----------------------------------------------------------------------------
96 class gzfilebuf : public streambuf
100 #ifndef FG_HAVE_STD_INCLUDES
101 typedef char_traits<char> traits_type;
102 typedef char_traits<char>::int_type int_type;
103 typedef char_traits<char>::pos_type pos_type;
104 typedef char_traits<char>::off_type off_type;
108 virtual ~gzfilebuf();
110 gzfilebuf* open( const char* name, ios_openmode io_mode );
111 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
114 // int setcompressionlevel( int comp_level );
115 // int setcompressionstrategy( int comp_strategy );
116 bool is_open() const { return (file != NULL); }
117 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
122 virtual int_type underflow();
123 virtual int_type overflow( int_type c = traits_type::eof() );
130 // Convert io_mode to "rwab" string.
131 void cvt_iomode( char* mode_str, ios_openmode io_mode );
137 bool own_file_descriptor;
139 // Get (input) buffer.
143 enum { page_size = 4096 };
147 gzfilebuf( const gzfilebuf& );
148 void operator= ( const gzfilebuf& );
151 //-----------------------------------------------------------------------------
155 struct gzifstream_base
162 #endif // _zfstream_hxx