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package Preprocessor;
# ************************************************************
# Description : Preprocesses the supplied file.
# Author : Chad Elliott
# Create Date : 2/10/2002
# ************************************************************
# ************************************************************
# Pragmas
# ************************************************************
use strict;
use FileHandle;
# ************************************************************
# Subroutine Section
# ************************************************************
sub new {
my($class) = shift;
my($macros) = shift;
my($options) = shift;
my($ipaths) = shift;
my($self) = bless {'macros' => $macros,
'options' => $options,
'ipaths' => $ipaths,
'files' => {},
}, $class;
return $self;
}
sub locateFile {
my($self) = shift;
my($file) = shift;
foreach my $dir ('.', @{$self->{'ipaths'}}) {
if (-r "$dir/$file") {
return "$dir/$file";
}
}
return undef;
}
sub getFiles {
my($self) = shift;
my($file) = shift;
foreach my $inc (@{$self->{'files'}->{$file}}) {
if (!defined $self->{'ifiles'}->{$inc}) {
$self->{'ifiles'}->{$inc} = 1;
$self->getFiles($inc);
}
}
}
sub process {
my($self) = shift;
my($file) = shift;
my($noincs) = shift;
my($fh) = new FileHandle();
my(@incs) = ();
if (open($fh, $file)) {
my($ifcount) = 0;
my(@zero) = ();
$self->{'files'}->{$file} = [];
while(<$fh>) {
$_ =~ s/\/\/.*//;
if (/#\s*if\s+0/) {
push(@zero, $ifcount);
++$ifcount;
}
elsif (/#\s*if/) {
++$ifcount;
}
elsif (/#\s*endif/) {
--$ifcount;
if (defined $zero[0] && $ifcount == $zero[$#zero]) {
pop(@zero);
}
}
elsif (!defined $zero[0] &&
/#\s*include\s+(\/\*\*\/\s*)?[<"]([^">]+)[">]/) {
my($inc) = $self->locateFile($2);
if (defined $inc) {
$inc =~ s/\\/\//g;
push(@{$self->{'files'}->{$file}}, $inc);
if (!defined $self->{'files'}->{$inc}) {
## Process this file, but do not return the include files
$self->process($inc, 1);
}
}
}
}
close($fh);
if (!$noincs) {
$self->{'ifiles'} = {};
$self->getFiles($file);
@incs = keys %{$self->{'ifiles'}};
}
}
return \@incs;
}
1;
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