120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
|
// zlib input file stream wrapper.
|
||
|
|
//
|
||
|
|
// Written by Bernie Bright, 1998
|
||
|
|
//
|
||
|
|
// Copyright (C) 1998 Bernie Bright - bbright@c031.aone.net.au
|
||
|
|
//
|
||
|
|
// This program is free software; you can redistribute it and/or
|
||
|
|
// modify it under the terms of the GNU General Public License as
|
||
|
|
// published by the Free Software Foundation; either version 2 of the
|
||
|
|
// License, or (at your option) any later version.
|
||
|
|
//
|
||
|
|
// This program is distributed in the hope that it will be useful, but
|
||
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
// General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU General Public License
|
||
|
|
// along with this program; if not, write to the Free Software
|
||
|
|
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
//
|
||
|
|
// $Id$
|
||
|
|
// (Log is kept at end of this file)
|
||
|
|
|
||
|
|
#include <ctype.h> // isspace()
|
||
|
|
#include "fgstream.hxx"
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Open a possibly gzipped file for reading.
|
||
|
|
//
|
||
|
|
fg_gzifstream::fg_gzifstream( const string& name, int io_mode )
|
||
|
|
{
|
||
|
|
open( name, io_mode );
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Open a possibly gzipped file for reading.
|
||
|
|
// If the initial open fails and the filename has a ".gz" extension then
|
||
|
|
// remove the extension and try again.
|
||
|
|
// If the initial open fails and the filename doesn't have a ".gz" extension
|
||
|
|
// then append ".gz" and try again.
|
||
|
|
//
|
||
|
|
void
|
||
|
|
fg_gzifstream::open( const string& name, int io_mode )
|
||
|
|
{
|
||
|
|
gzstream.open( name.c_str(), io_mode );
|
||
|
|
if ( gzstream.fail() )
|
||
|
|
{
|
||
|
|
string s = name;
|
||
|
|
if ( s.substr( s.length() - 3, 3 ) == ".gz" )
|
||
|
|
{
|
||
|
|
// remove ".gz" suffix
|
||
|
|
s.erase( s.length() - 3, 3 );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Append ".gz" suffix
|
||
|
|
s += ".gz";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Try again.
|
||
|
|
gzstream.open( s.c_str(), io_mode );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Remove whitespace characters from the stream.
|
||
|
|
//
|
||
|
|
istream&
|
||
|
|
fg_gzifstream::eat_whitespace()
|
||
|
|
{
|
||
|
|
char c;
|
||
|
|
while ( gzstream.get(c) )
|
||
|
|
{
|
||
|
|
if ( ! isspace( c ) )
|
||
|
|
{
|
||
|
|
// put pack the non-space character
|
||
|
|
gzstream.putback(c);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return gzstream;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Remove whitspace chatacters and comment lines from a stream.
|
||
|
|
//
|
||
|
|
istream&
|
||
|
|
fg_gzifstream::eat_comments()
|
||
|
|
{
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
// skip whitespace
|
||
|
|
eat_whitespace();
|
||
|
|
|
||
|
|
char c;
|
||
|
|
gzstream.get( c );
|
||
|
|
if ( c != '#' )
|
||
|
|
{
|
||
|
|
// not a comment
|
||
|
|
gzstream.putback(c);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// skip to end of line.
|
||
|
|
while ( gzstream.get(c) && c != '\n' )
|
||
|
|
;
|
||
|
|
}
|
||
|
|
return gzstream;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// $Log$
|
||
|
|
// Revision 1.1 1998/09/01 19:06:29 curt
|
||
|
|
// Initial revision.
|
||
|
|
//
|