option parsing

diff --git a/utility b/utility
index 26ed2433c8374cf651feb91af0e13b8bd986f684..8cff135ab8b689fd99e3a538b17c7a526031100c 100755 (executable)
--- a/utility
+++ b/utility
@@ -2,8 +2,12 @@
 use strict;
 use POSIX;
 use IO::File;
+use Getopt::Long;
 
-our @rulespath=('.');
+our $package='xfonts-traditional';
+our $sharedir="/usr/share/$package";
+our @rulespath;
+our $mode;
 
 sub loadrules ($) {
     my ($key) = @_;
@@ -79,9 +83,34 @@ sub processbdf ($$) {
     die unless $state eq 'idle';
 }
 
-processbdf((new IO::File '<&STDIN'),
-          (new IO::File '>&STDOUT'));
+our (@options)=(
+    'R|rules-include=s@' => \@rulespath,
+    'share-dir=s' => \$sharedir,
+    );
 
+sub define_mode ($$) {
+    my ($optname,$f) = @_;
+    push @options, $optname, sub {
+       die "only one mode may be specified\n" if defined $mode;
+       $mode=$f;
+    };
+}
+
+define_mode('bdf-filter', sub {
+    die if @ARGV;
+
+    processbdf((new IO::File '<&STDIN'),
+              (new IO::File '>&STDOUT'));
+});
+
+Getopt::Long::Configure(qw(bundling));
+GetOptions(@options) or exit 127;
+
+push @rulespath, "$sharedir/rules" unless @rulespath;
+
+die "need a mode\n" unless $mode;
+
+$mode->();
 
 #   70  zcat /usr/share/fonts/X11/misc/6x13.pcf.gz |pcf2bdf >in.bdf
 #   71  ./utility <in.bdf >out.bdf