#!/usr/bin/perl -w
# Copyright 2001 Bjorn Bringert
# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

use strict;

my $f = $ARGV[0];
my $o;

if ($f =~ /\.java$/){
	$o = java($f);
}elsif ($f =~ /\.hs$/){
	$o = haskell($f);
}elsif ($f =~ /\.c$/){
	$o = c($f);
}elsif ($f =~ /\.pl$/){
	$o = perl($f);
}elsif (-x $f){
 	$o = run($f);
}else{
 	die "Unknown program type."
}

my $p = `cat $f`;
if ($o eq $p){
 	print "quine, ".(length $o)." characters\n";
}else{
	print "Not quine\ncode:\n'$p'\noutput:\n'$o'\n";
}

sub toAbsolute{
 	$_[0] =~ s/^([^\/].*)/.\/$1/;
	return $_[0];
}

sub java{
	(my $c = $_[0]) =~ s/\.java//;
	system("javac $_[0]");
	return `java $c`;
}

sub haskell{
	return `runhugs $_[0]`;
}

sub c{
	(my $c = $_[0]) =~ s/\.c//;
	system("gcc -o $c $_[0]");
	return `./$c`;
}

sub perl{
	return `perl $_[0]`;
}

sub run{
	my $c = toAbsolute($_[0]);
 	return `$c`;
}