freebsd-dev/contrib/perl5/lib/getopt.pl

42 lines
1.0 KiB
Perl

;# $RCSfile: getopt.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:23:58 $
;# 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;