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#
# Copyright (C) 2005 Nikolas Zimmermann <wildfox@kde.org>
# Copyright (C) 2011 Google Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this library; see the file COPYING.LIB. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.
#
use strict;
use warnings;
use IPC::Open2;
BEGIN {
use Exporter ();
our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = qw(&applyPreprocessor);
%EXPORT_TAGS = ( );
@EXPORT_OK = ();
}
# Returns an array of lines.
sub applyPreprocessor
{
my $fileName = shift;
my $defines = shift;
my $preprocessor = shift;
if (!$preprocessor) {
require Config;
my $gccLocation = "";
if ($ENV{CC}) {
$gccLocation = $ENV{CC};
} elsif (($Config::Config{'osname'}) =~ /solaris/i) {
$gccLocation = "/usr/sfw/bin/gcc";
} else {
$gccLocation = "/usr/bin/gcc";
}
$preprocessor = $gccLocation . " -E -P -x c++";
}
# Remove double quotations from $defines and extract macros.
# For example, if $defines is ' "A=1" "B=1" C=1 "" D ',
# then it is converted into four macros -DA=1, -DB=1, -DC=1 and -DD.
$defines =~ s/\"//g;
my @macros = grep { $_ } split(/\s+/, $defines); # grep skips empty macros.
@macros = map { "-D$_" } @macros;
my $pid = open2(\*PP_OUT, \*PP_IN, split(' ', $preprocessor), @macros, $fileName);
close PP_IN;
my @documentContent = <PP_OUT>;
close PP_OUT;
waitpid($pid, 0);
return @documentContent;
}
1;
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