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https://git.code.sf.net/p/fuse-emulator/fuse
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80 lines
1.8 KiB
Perl
Executable File
80 lines
1.8 KiB
Perl
Executable File
#!/usr/bin/perl
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# cpp-perl.pl: trivial preprocessor with just about enough intelligence
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# to parse config.h
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# Copyright (c) 2004 Philip Kendall
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# $Id$
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program 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
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 49 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Author contact information:
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# Philip Kendall <pak21-fuse@srcf.ucam.org>
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# Postal address: 15 Crescent Road, Wokingham, Berks, RG40 2DB, England
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use warnings;
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use strict;
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use IO::File;
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my %defines;
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my @conditions;
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sub parse_file ($;$) {
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my( $filename, $inhibit ) = @_;
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$inhibit ||= 0;
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my $fh = new IO::File( '<' . $filename )
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or die "Couldn't open '$filename': $!";
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while( <$fh> ) {
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if( /^#define ([[:alnum:]_]+) (.*)$/ ) {
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$defines{$1} = $2;
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next;
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}
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if( /^#ifdef ([[:alnum:]_]+)/ ) {
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push @conditions, $conditions[-1] && defined $defines{$1};
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next;
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}
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if( /^#ifndef ([[:alnum:]_]+)/ ) {
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push @conditions, $conditions[-1] && not defined $defines{$1};
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next;
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}
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if( /^#endif/ ) {
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pop @conditions;
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next;
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}
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s/^#.*$//;
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next if /^\s*$/;
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print if $conditions[-1] and not $inhibit;
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}
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}
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die "$0: usage: $0 /path/to/config.h /path/to/data/file\n" unless @ARGV == 2;
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push @conditions, 1;
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parse_file( $ARGV[0], 1 );
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parse_file( $ARGV[1] );
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