source: trunk/essentials/dev-lang/perl/lib/getopt.pl@ 3221

;# $RCSfile: getopt.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:23:58 $
#
# 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
#
;# Process single-character switches with switch clustering.  Pass one argument
;# which is a string containing all switches that take an argument.  For each
;# switch found, sets $opt_x (where x is the switch name) to the value of the
;# argument, or 1 if no argument.  Switches which take an argument don't care
;# whether there is a space between the switch and the argument.

;# Usage:
;#      do Getopt('oDI');  # -o, -D & -I take arg.  Sets opt_* as a side effect.

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

    while (@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
        ($first,$rest) = ($1,$2);
        if (index($argumentative,$first) >= $[) {
            if ($rest ne '') {
                shift(@ARGV);
            }
            else {
                shift(@ARGV);
                $rest = shift(@ARGV);
            }
            ${"opt_$first"} = $rest;
        }
        else {
            ${"opt_$first"} = 1;
            if ($rest ne '') {
                $ARGV[0] = "-$rest";
            }
            else {
                shift(@ARGV);
            }
        }
    }
}

1;