curt
220a43bf46
developer will need to build and install these separately if they don't have packages already installed by their system. See README.metakit and README.zlib for more details. As a convenience, pristine tarballs of the metakit and zlib source code trees are included with the simgear distribution (and cvs.)
188 lines
4.3 KiB
C++
188 lines
4.3 KiB
C++
/**
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* \file zfstream.hxx
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* A C++ I/O streams interface to the zlib gz* functions.
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*/
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// Written by Bernie Bright, 1998
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// Based on zlib/contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
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//
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// Copyright (C) 1998 Bernie Bright - bbright@c031.aone.net.au
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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//
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// $Id$
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#ifndef _zfstream_hxx
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#define _zfstream_hxx
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#include <simgear/compiler.h>
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#include <zlib.h>
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// At least Irix needs this
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#ifdef SG_HAVE_NATIVE_SGI_COMPILERS
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#include <char_traits.h>
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SG_USING_STD(char_traits);
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#endif
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#ifdef SG_HAVE_STD_INCLUDES
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# include <streambuf>
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# include <istream>
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# define ios_openmode ios_base::openmode
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# define ios_in ios_base::in
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# define ios_out ios_base::out
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# define ios_app ios_base::app
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# define ios_binary ios_base::binary
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# define ios_seekdir ios_base::seekdir
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# define ios_badbit ios_base::badbit
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# define ios_failbit ios_base::failbit
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SG_USING_STD(streambuf);
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SG_USING_STD(ios_base);
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SG_USING_STD(streampos);
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SG_USING_STD(streamoff);
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#else
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# ifdef SG_HAVE_STREAMBUF
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# include <streambuf.h>
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# include <istream.h>
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# else
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# include <iostream.h>
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# endif
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//# define ios_openmode ios::open_mode
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# define ios_openmode int
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# define ios_in ios::in
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# define ios_out ios::out
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# define ios_app ios::app
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#if defined(__GNUC__) && __GNUC_MINOR__ < 8
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# define ios_binary ios::bin
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#elif defined( SG_HAVE_NATIVE_SGI_COMPILERS )
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# define ios_binary 0
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#else
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# define ios_binary ios::binary
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#endif
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# define ios_seekdir ios::seek_dir
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# define ios_badbit ios::badbit
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# define ios_failbit ios::failbit
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# include <simgear/sg_traits.hxx>
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#endif // SG_HAVE_STD_INCLUDES
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/**
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* A C++ I/O streams interface to the zlib gz* functions.
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*/
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class gzfilebuf : public streambuf
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{
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public:
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#ifndef SG_HAVE_STD_INCLUDES
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typedef char_traits<char> traits_type;
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typedef char_traits<char>::int_type int_type;
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// typedef char_traits<char>::pos_type pos_type;
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// typedef char_traits<char>::off_type off_type;
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#endif
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/** Constructor */
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gzfilebuf();
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/** Destructor */
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virtual ~gzfilebuf();
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/**
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* Open a stream
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* @param name file name
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* @param io_mode mdoe flags
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* @return file stream
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*/
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gzfilebuf* open( const char* name, ios_openmode io_mode );
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/**
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* Attach to an existing file descriptor
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* @param file_descriptor file descriptor
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* @param io_mode mode flags
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* @return file stream
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*/
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gzfilebuf* attach( int file_descriptor, ios_openmode io_mode );
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/** Close stream */
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gzfilebuf* close();
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// int setcompressionlevel( int comp_level );
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// int setcompressionstrategy( int comp_strategy );
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/** @return true if open, false otherwise */
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bool is_open() const { return (file != NULL); }
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/** @return stream position */
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virtual streampos seekoff( streamoff off, ios_seekdir way, int which );
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/** sync the stream */
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virtual int sync();
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protected:
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virtual int_type underflow();
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virtual int_type overflow( int_type c = traits_type::eof() );
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private:
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int_type flushbuf();
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int fillbuf();
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// Convert io_mode to "rwab" string.
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void cvt_iomode( char* mode_str, ios_openmode io_mode );
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private:
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gzFile file;
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ios_openmode mode;
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bool own_file_descriptor;
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// Get (input) buffer.
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int ibuf_size;
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char* ibuffer;
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enum { page_size = 4096 };
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private:
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// Not defined
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gzfilebuf( const gzfilebuf& );
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void operator= ( const gzfilebuf& );
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};
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/**
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* document me
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*/
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struct gzifstream_base
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{
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gzifstream_base() {}
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gzfilebuf gzbuf;
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};
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#endif // _zfstream_hxx
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