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#!/usr/bin/env perl
#-*- Mode: perl; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
# GNU libperl shared libraries for Perl (Option package).
#
# Copyright (C) 2000-2001 Free Software Foundation
#
# Authors: Kenneth Christiansen <kenneth@gnu.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library 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 Library General Public License for more details.
#
# You should have received a copy of the GNU Library 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.
sub str_format # (string, size)
{
my ($string, $size) = @_;
my @char = unpack ('C*', $string);
$size = $size-$#char;
for ($i = 0; $i < $size; $i++){
$string = "$string ";
}
return $string;
}
# get_options takes two hashes and the name of the
# program. One hash is build up of arrays with info of:
# [0] sub to run, [1] shortcut, [2] help info, [3] array
# with sub arguments.
#
# If there in [0] is written "VAR", then the variable in
# [3] will be set to 1 (ie. true).
#
# The second hash includes shortcuts associated with the
# subs declaired in the first hash.
#
# If $ARGV is empty the &msg_no_option message is shown.
# If an argument is not in the first hash the message
# &msg_invalid_option is shown.
#
# All other arguments that are not options (ie. starting
# with - or -- are returned by the get_options function
sub get_options # (string of appname, hashref of options, hashref of shortcut)
{
($program, $options, $shortcuts) = @_;
my %options = %{$options};
my %shortcuts = %{$shortcuts};
my (@files, @args, $func, $opt, $tmp);
if ($#ARGV < 0) {
&msg_option_none ($program);
exit;
}
foreach $arg (@ARGV) {
## check if it is an option
if ($arg =~ /^-+(.*)$/) {
$opt = $1;
## check for legal single char options
if ($opt =~ /^(\w)$/) {
$tmp = "$shortcuts{$1}";
$opt = $tmp if ($tmp ne "");
}
if ($options{$opt}) {
my ($method, $argv) = @{$options{$opt}}[0,3];
if ($method eq "VAR") {
${$argv} = 1; ## setting variable to true
next;
}
elsif ($func eq ""){
@args = @{$argv};
$func = "$method";
}
}
else {
&msg_option_invalid ($program, $opt);
}
}
else {
push @files, $arg;
}
}
&$func(@args) if ($func); ## execute sub associated with option
return @files;
}
sub file_open_stringbuffer # (file)
{
my ($file) = @_;
local (*FILE);
local $/; # slurp mode
open (FILE, "<$file") || die "can't open $file: $!";
return <FILE>;
}
# -- Messages -- #
sub msg_about # (program, release, copyright, author, year)
{
my ($program, $version, $copyright, $author, $year) = @_;
## Print version information
if ($#_ < 4) {
print STRERR "WARNING: Not enought arguments given to function\n";
}
else {
print "$program $version\n";
printf "Written by %s, %s.\n\nCopyright (C) %s, %s \n", $author, $year, $year, $copyright;
print "This is free software; see the source for copying conditions. There is NO\n";
print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
}
exit;
}
sub msg_option_none # (prog_name)
{
my ($program) = @_;
## Handle invalid arguments
printf "%s: missing arguments\n", $program;
exit 1;
}
sub msg_option_invalid # (prog_name, option)
{
my ($program, $option) = @_;
## Handle invalid arguments
printf ("%s: invalid option -- %s\n", $program, $option);
printf ("Try '%s --help' for more information.\n", $program);
exit 1;
}
sub msg_help
{
my ($program, $usage, $desc, $author, $extra, $options) = @_;
my %options = %{$options};
## Print usage information
print "Usage: $program $usage\n$desc\n\n";
foreach $line (keys %options) {
my ($tmp, $shortcut, $info) = @{$options{$line}};
if ($shortcut eq "") {
print " --";
} else {
print " -$shortcut, --";
}
print str_format($line, 25) . "$info\n";
}
print "$extra\n" . "Report bugs to $author.\n";
exit;
}
1;
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