3 * A C++ I/O streams interface to the zlib gz* functions.
6 // Written by Bernie Bright, 1998
7 // Based on zlib/contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
9 // Copyright (C) 1998 Bernie Bright - bbright@c031.aone.net.au
11 // This library is free software; you can redistribute it and/or
12 // modify it under the terms of the GNU Library General Public
13 // License as published by the Free Software Foundation; either
14 // version 2 of the License, or (at your option) any later version.
16 // This library is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 // Library General Public License for more details.
21 // You should have received a copy of the GNU Library General Public
22 // License along with this library; if not, write to the
23 // Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 // Boston, MA 02111-1307, USA.
31 #include <simgear/compiler.h>
35 // At least Irix needs this
36 #ifdef SG_HAVE_NATIVE_SGI_COMPILERS
37 #include <char_traits.h>
38 SG_USING_STD(char_traits);
41 #ifdef SG_HAVE_STD_INCLUDES
46 # define ios_openmode ios_base::openmode
47 # define ios_in ios_base::in
48 # define ios_out ios_base::out
49 # define ios_app ios_base::app
50 # define ios_binary ios_base::binary
52 # define ios_seekdir ios_base::seekdir
54 # define ios_badbit ios_base::badbit
55 # define ios_failbit ios_base::failbit
57 SG_USING_STD(streambuf);
58 SG_USING_STD(ios_base);
59 SG_USING_STD(streampos);
60 SG_USING_STD(streamoff);
64 # ifdef SG_HAVE_STREAMBUF
65 # include <streambuf.h>
68 # include <iostream.h>
71 //# define ios_openmode ios::open_mode
72 # define ios_openmode int
73 # define ios_in ios::in
74 # define ios_out ios::out
75 # define ios_app ios::app
77 #if defined(__GNUC__) && __GNUC_MINOR__ < 8
78 # define ios_binary ios::bin
79 #elif defined( SG_HAVE_NATIVE_SGI_COMPILERS )
82 # define ios_binary ios::binary
85 # define ios_seekdir ios::seek_dir
87 # define ios_badbit ios::badbit
88 # define ios_failbit ios::failbit
90 # include <simgear/sg_traits.hxx>
92 #endif // SG_HAVE_STD_INCLUDES
95 * A C++ I/O streams interface to the zlib gz* functions.
97 class gzfilebuf : public streambuf
101 #ifndef SG_HAVE_STD_INCLUDES
102 typedef char_traits<char> traits_type;
103 typedef char_traits<char>::int_type int_type;
104 // typedef char_traits<char>::pos_type pos_type;
105 // typedef char_traits<char>::off_type off_type;
112 virtual ~gzfilebuf();
116 * @param name file name
117 * @param io_mode mdoe flags
118 * @return file stream
120 gzfilebuf* open( const char* name, ios_openmode io_mode );
123 * Attach to an existing file descriptor
124 * @param file_descriptor file descriptor
125 * @param io_mode mode flags
126 * @return file stream
128 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
133 // int setcompressionlevel( int comp_level );
134 // int setcompressionstrategy( int comp_strategy );
136 /** @return true if open, false otherwise */
137 bool is_open() const { return (file != NULL); }
139 /** @return stream position */
140 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
142 /** sync the stream */
147 virtual int_type underflow();
148 virtual int_type overflow( int_type c = traits_type::eof() );
155 // Convert io_mode to "rwab" string.
156 void cvt_iomode( char* mode_str, ios_openmode io_mode );
162 bool own_file_descriptor;
164 // Get (input) buffer.
168 enum { page_size = 4096 };
172 gzfilebuf( const gzfilebuf& );
173 void operator= ( const gzfilebuf& );
179 struct gzifstream_base
186 #endif // _zfstream_hxx