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.
35 #include <simgear/compiler.h>
40 # include <simgear/zlib/zlib.h>
43 // At least Irix needs this
44 #ifdef SG_HAVE_NATIVE_SGI_COMPILERS
45 #include <char_traits.h>
46 SG_USING_STD(char_traits);
49 #ifdef SG_HAVE_STD_INCLUDES
54 # define ios_openmode ios_base::openmode
55 # define ios_in ios_base::in
56 # define ios_out ios_base::out
57 # define ios_app ios_base::app
58 # define ios_binary ios_base::binary
60 # define ios_seekdir ios_base::seekdir
62 # define ios_badbit ios_base::badbit
63 # define ios_failbit ios_base::failbit
65 SG_USING_STD(streambuf);
66 SG_USING_STD(ios_base);
67 SG_USING_STD(streampos);
68 SG_USING_STD(streamoff);
72 # ifdef SG_HAVE_STREAMBUF
73 # include <streambuf.h>
76 # include <iostream.h>
79 //# define ios_openmode ios::open_mode
80 # define ios_openmode int
81 # define ios_in ios::in
82 # define ios_out ios::out
83 # define ios_app ios::app
85 #if defined(__GNUC__) && __GNUC_MINOR__ < 8
86 # define ios_binary ios::bin
87 #elif defined( SG_HAVE_NATIVE_SGI_COMPILERS )
90 # define ios_binary ios::binary
93 # define ios_seekdir ios::seek_dir
95 # define ios_badbit ios::badbit
96 # define ios_failbit ios::failbit
98 # include <simgear/sg_traits.hxx>
100 #endif // SG_HAVE_STD_INCLUDES
103 * A C++ I/O streams interface to the zlib gz* functions.
105 class gzfilebuf : public streambuf
109 #ifndef SG_HAVE_STD_INCLUDES
110 typedef char_traits<char> traits_type;
111 typedef char_traits<char>::int_type int_type;
112 // typedef char_traits<char>::pos_type pos_type;
113 // typedef char_traits<char>::off_type off_type;
120 virtual ~gzfilebuf();
124 * @param name file name
125 * @param io_mode mdoe flags
126 * @return file stream
128 gzfilebuf* open( const char* name, ios_openmode io_mode );
131 * Attach to an existing file descriptor
132 * @param file_descriptor file descriptor
133 * @param io_mode mode flags
134 * @return file stream
136 gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
141 // int setcompressionlevel( int comp_level );
142 // int setcompressionstrategy( int comp_strategy );
144 /** @return true if open, false otherwise */
145 bool is_open() const { return (file != NULL); }
147 /** @return stream position */
148 virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
150 /** sync the stream */
155 virtual int_type underflow();
156 virtual int_type overflow( int_type c = traits_type::eof() );
163 // Convert io_mode to "rwab" string.
164 void cvt_iomode( char* mode_str, ios_openmode io_mode );
170 bool own_file_descriptor;
172 // Get (input) buffer.
176 enum { page_size = 4096 };
180 gzfilebuf( const gzfilebuf& );
181 void operator= ( const gzfilebuf& );
187 struct gzifstream_base
194 #endif // _zfstream_hxx