#!/bin/sh
# Copyright (C) 2002,2006 Adalbert Prokop, adalbert.prokop(%)web.de

# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

declare -i begin
declare -i step
declare -i pos
declare -i power
declare -i powern
declare -i counter

if [ "$#" -ge "6" ]; then
	step="$5"
	begin="$4"
	pos="$3"
	postfix="$2"
	prefix="$1"
	
	counter=$begin
	
	shift 5
	for file in "$@"; do
		longcounter=$(printf "%0${pos}i" $counter)
		mv -vi "$file" "$prefix$longcounter$postfix"
		counter=$(($counter+$step))
	done
else
	echo "Usage: renumber <prefix> <postfix> <positions> <begin> <step> <file> [files...]"
	echo
	echo "There must be at least 6 options given. (This means at least"
	echo "one file.)"
fi