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 <simgear/compiler.h>
32 # include <simgear/zlib/zlib.h>
35 #ifdef FG_HAVE_STD_INCLUDES
40 # define ios_openmode ios_base::openmode
41 # define ios_in ios_base::in
42 # define ios_out ios_base::out
43 # define ios_app ios_base::app
44 # define ios_binary ios_base::binary
46 # define ios_seekdir ios_base::seekdir
48 # define ios_badbit ios_base::badbit
49 # define ios_failbit ios_base::failbit
51 FG_USING_STD(streambuf);
52 FG_USING_STD(ios_base);
53 FG_USING_STD(streampos);
54 FG_USING_STD(streamoff);
58 # ifdef FG_HAVE_STREAMBUF
59 # include <streambuf.h>
62 # include <iostream.h>
65 //# define ios_openmode ios::open_mode
66 # define ios_openmode int
67 # define ios_in ios::in
68 # define ios_out ios::out
69 # define ios_app ios::app
71 #if defined(__GNUC__) && __GNUC_MINOR__ < 8
72 # define ios_binary ios::bin
73 #elif defined( FG_HAVE_NATIVE_SGI_COMPILERS )
76 # define ios_binary ios::binary
79 # define ios_seekdir ios::seek_dir
81 # define ios_badbit ios::badbit
82 # define ios_failbit ios::failbit
84 # include <simgear/fg_traits.hxx>
86 #endif // FG_HAVE_STD_INCLUDES
88 //-----------------------------------------------------------------------------
92 class gzfilebuf : public streambuf
96 #ifndef FG_HAVE_STD_INCLUDES
97 typedef char_traits<char> traits_type;
98 typedef char_traits<char>::int_type int_type;
99 typedef char_traits<char>::pos_type pos_type;
100 typedef char_traits<char>::off_type off_type;
104 virtual ~gzfilebuf();
106 gzfilebuf* open( const char* name, ios_openmode io_mode );
107 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
110 // int setcompressionlevel( int comp_level );
111 // int setcompressionstrategy( int comp_strategy );
112 bool is_open() const { return (file != NULL); }
113 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
118 virtual int_type underflow();
119 virtual int_type overflow( int_type c = traits_type::eof() );
126 // Convert io_mode to "rwab" string.
127 void cvt_iomode( char* mode_str, ios_openmode io_mode );
133 bool own_file_descriptor;
135 // Get (input) buffer.
139 enum { page_size = 4096 };
143 gzfilebuf( const gzfilebuf& );
144 void operator= ( const gzfilebuf& );
147 //-----------------------------------------------------------------------------
151 struct gzifstream_base
158 #endif // _zfstream_hxx