source: trunk/essentials/dev-lang/perl/lib/getopts.pl@ 3951

;# getopts.pl - a better getopt.pl
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternatives: Getopt::Long  or  Getopt::Std
#
;# Usage:
;#      do Getopts('a:bc');  # -a takes arg. -b & -c not. Sets opt_* as a
;#                           #  side effect.

sub Getopts {
    local($argumentative) = @_;
    local(@args,$_,$first,$rest);
    local($errs) = 0;
    local($[) = 0;

    @args = split( / */, $argumentative );
    while(@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
                ($first,$rest) = ($1,$2);
                $pos = index($argumentative,$first);
                if($pos >= $[) {
                        if($args[$pos+1] eq ':') {
                                shift(@ARGV);
                                if($rest eq '') {
                                        ++$errs unless(@ARGV);
                                        $rest = shift(@ARGV);
                                }
                                eval "
                                push(\@opt_$first, \$rest);
                                if (!defined \$opt_$first or \$opt_$first eq '') {
                                        \$opt_$first = \$rest;
                                }
                                else {
                                        \$opt_$first .= ' ' . \$rest;
                                }
                                ";
                        }
                        else {
                                eval "\$opt_$first = 1";
                                if($rest eq '') {
                                        shift(@ARGV);
                                }
                                else {
                                        $ARGV[0] = "-$rest";
                                }
                        }
                }
                else {
                        print STDERR "Unknown option: $first\n";
                        ++$errs;
                        if($rest ne '') {
                                $ARGV[0] = "-$rest";
                        }
                        else {
                                shift(@ARGV);
                        }
                }
        }
    $errs == 0;
}

1;