#!/usr/bin/perl
######################################################################
# DOS <-> Unix text Converter             Version 1.0                # 
# Copyright 1999 Frederic TYNDIUK (FTLS)  All Rights Reserved.       #
# E-Mail: tyndiuk@ftls.org                Script License: GPL        #
# Created  06/30/99                       Last Modified 06/30/99     #
# Scripts Archive at:                     http://www.ftls.org/cgi/   #
######################################################################
# Function :                                                         #
# Converts DOS-text file to Unix-text file or Unix-text file to DOS. #
######################################################################
##################### license & copyright header #####################
#                                                                    #
#                 Copyright (c) 1999 TYNDIUK Frederic                #
#                                                                    #
#  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 in the file 'COPYING'; if not, write to   #
#  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,  #
#  Boston, MA 02111-1307, USA, or contact the author:                #
#                                                                    #
#                              TYNDIUK Frederic <tyndiuk@ftls.org>   #
#                                       <http://www.ftls.org/>       #
#                                                                    #
################### end license & copyright header ###################
######################################################################

$Version = "1.0";
$Copyright  = "DOS <-> Unix text Converter v$Version (C) 1999 Frederic TYNDIUK (alias FTLS)\n";
$Copyright .= "Report bugs to tyndiuk\@ftls.org, News and Updates: http://www.ftls.org/\n";

$d2u = $u2d = 0;

	# En: Check Args
	# Fr: Verification des aguments
	while ($ARGV[0] =~ /^-/) {
		if (($ARGV[0] eq "-d2u") || ($ARGV[0] eq "--dos-to-unix")) { $d2u = 1; }
		if (($ARGV[0] eq "-u2d") || ($ARGV[0] eq "--unix-to-dos")) { $u2d = 1; }
		if (($ARGV[0] eq "-v")   || ($ARGV[0] eq "--version"))     { print $Copyright; exit; }
		if (($ARGV[0] eq "-h")   || ($ARGV[0] eq "--help"))        { &Usage(); }
		shift(@ARGV);
	}

	if ((@ARGV < 1) || ($d2u == $u2d)) {
		&Usage;
	}

	while ($ARGV[0] ne "") {
		&d2u2d($ARGV[0], $ARGV[0]);
		shift(@ARGV);
	}

sub d2u2d {
	my($SourceFile, $ResultFile) = @_;
	my($DOS, @DOSFile);

	open(FILE, "$SourceFile") || die("Cannot open source file : $SourceFile, Error $!\n");
	@DOSFile = <FILE>;
	close(FILE);

	open(COM, ">$SourceFile.old") || die("Cannot write file $SourceFile.old, Error $!");
	print COM @DOSFile;
	close(COM);

	$DOS = join("", @DOSFile);
	if ($d2u) {
		$DOS =~ s/\r\n/\n/g;  # Dos -> Unix
	} else {
		$DOS =~ s/\n/\r\n/g;  # Unix -> Dos
	}

	open(COM, ">$ResultFile") || die("Cannot write file $ResultFile, Error $!");
	print COM $DOS;
	close(COM);
}

sub Usage {
	print STDERR <<EOF;
$Copyright
Usage: $0 [Options] [-d2u / -u2d] DosFile...
  -d2u        --dos-to-unix           convert DOS-text file to Unix
  -u2d        --unix-to-dos           convert Unix-text file to DOS
Options:
  -v,         --version               output version information and exit
  -h,         --help                  display this help and exit
EOF
	exit 1;
}