fixed iscallsign!

[spider.git] / perl / DXUtil.pm

diff --git a/perl/DXUtil.pm b/perl/DXUtil.pm
index 07e3f4cb3bede190e80ae629259be3b8df7da646..c4abc15bef7021d76c2352f55278350f02b3e3c9 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
-             print_all_fields cltounix 
+@EXPORT = qw(atime ztime cldate cldatetime slat slong yesno promptf 
+                        parray parraypairs shellregex
+             print_all_fields cltounix iscallsign
             );
 
 @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
@@ -72,7 +79,9 @@ sub cltounix
        $date = "$1 $2 $3";
        return 0 unless $time =~ /^([012]\d)([012345]\d)Z$/;
        $time = "$1:$2 +0000";
-       return str2time("$date $time");
+       my $r = str2time("$date $time");
+       return $r unless $r;
+       return $r == -1 ? undef : $r;
 }
 
 # turn a latitude in degrees into a string
@@ -167,3 +176,20 @@ 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 . "\$";
+}
+
+# start an attempt at determining whether this string might be a callsign
+sub iscallsign
+{
+       my $call = shift;
+       return 1 if $call =~ /^\w+\d+/;
+       return 1 if $call =~ /^\d+\w+/;
+       return undef;
+}