#!/bin/bash
#
# Copyright (c) 2007 Werner Fink
# Copyright (c) 2007 SuSE Linux Products GmbH, Nuernberg, Germany.
#
#     This library is free software; you can redistribute it and/or modify it
#     under the terms of the GNU Lesser General Public License as published by
#     the Free Software Foundation; either version 2.1 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
#     Lesser General Public License for more details.
#
#     For a copy see <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html>
#
# Author: Werner Fink <werner@suse.de>

docode=yes
if test "$1" = "-e" ; then
    shift
    encode=$1
    docode=no
    shift
fi

for man; do
    pp="$(head -n 1 $man)"
    case "$pp" in
    \'\\\"*\ -\*-\ coding:\ *\ -\*-)
	continue
    esac
    if test "$docode" = "yes" ; then
	encode=$(sed -r "s/^(\.[[:alpha:]]{1,2}|\.\\\\\".*|'\\\\\".*)//;s/\\f[[:alpha:]]//;s/\\\\\".*//" $man | file -b -)
	encode=${encode%% *}
    fi
    case "$encode" in
    ISO-8859)
	echo "${0##*/}: The encoding $encode does not include the Latin Alphabet Number" 1>&2
	echo "${0##*/}: use option -e to specify" 1>&2
	echo "     ${0##*/} -e ISO-8859-<number> $man" 1>&2
	exit 1
    esac
    case "$pp" in
    \'\\\"*)
	sed -ri "1{s/('\\\\\".*)/\\1 -\*- coding: UTF-8 -\*-/}" $man
	;;
    *)
	sed -ri "1 i\
		'\\\\\" -\*- coding: UTF-8 -\*-\
		"  $man
    esac
done