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# ex:ts=8 sw=4:
# $OpenBSD: Getopt.pm,v 1.3 2006/07/31 16:27:21 espie Exp $
#
# Copyright (c) 2006 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# This is inspired by Getopt::Std, except for the ability to invoke subs
# on options.
#
package OpenBSD::Getopt;
require Exporter;
use strict;
use warnings;
our @ISA = qw(Exporter);
our @EXPORT = qw(getopts);
sub handle_option
{
my ($opt, $hash, $params) = @_;
$params = 1 unless defined $params;
if (defined $hash->{$opt} and ref($hash->{$opt}) eq 'CODE') {
&{$hash->{$opt}}($params);
} else {
no strict "refs";
no strict "vars";
${"opt_$opt"} = $params;
push(@EXPORT, "\$opt_$opt");
$hash->{$opt} = $params;
}
}
sub getopts($;$)
{
my ($args, $hash) = @_;
$hash = {} unless defined $hash;
local @EXPORT;
while ($_ = shift @ARGV) {
last if /^--$/;
unless (m/^-(.)(.*)/s) {
unshift @ARGV, $_;
last;
}
my ($opt, $other) = ($1, $2);
if ($args =~ m/\Q$opt\E(\:?)/) {
if ($1 eq ':') {
if ($other eq '') {
die "no argument for option -$opt" unless @ARGV;
$other = shift @ARGV;
}
handle_option($opt, $hash, $other);
} else {
handle_option($opt, $hash);
if ($other ne '') {
$_ = "-$other";
redo;
}
}
} else {
die "Unknown option -$opt";
}
}
local $Exporter::ExportLevel = 1;
import OpenBSD::Getopt;
return $hash;
}
1;
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