added shellregex

[spider.git] / perl / DXUtil.pm

diff --git a/perl/DXUtil.pm b/perl/DXUtil.pm
index 868110ea36d6e7de266d4c7e28a704181787b276..a1fb13ba2d34771044598ca3753f8a4238754830 100644 (file)
--- a/perl/DXUtil.pm
+++ b/perl/DXUtil.pm
@@ -13,11 +13,18 @@ use Carp;
 
 require Exporter;
 @ISA = qw(Exporter);
-@EXPORT = qw(atime ztime cldate cldatetime slat slong yesno promptf parray parraypairs
+@EXPORT = qw(atime ztime cldate cldatetime slat slong yesno promptf 
+                        parray parraypairs shellregex
              print_all_fields cltounix 
             );
 
 @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
+%patmap = (
+                  '*' => '.*',
+                  '?' => '.',
+                  '[' => '[',
+                  ']' => ']'
+);
 
 # a full time for logging and other purposes
 sub atime
@@ -168,3 +175,11 @@ sub print_all_fields
        return @out;
 }
 
+# generate a regex from a shell type expression 
+# see 'perl cookbook' 6.9
+sub shellregex
+{
+       my $in = shift;
+       $in =~ s{(.)} { $patmap{$1} || "\Q$1" }ge;
+       return '^' . $in . '$';
+}