X-Git-Url: http://dxcluster.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl%2FDXUtil.pm;h=1291db3943ff07b75dd1fcd99377d35a6482b342;hb=69e2746d46e5f6095530e76297aeddc1f359d4fb;hp=6c3ff30af271f7d31a3657c82dd01500c4cf9446;hpb=abab69b2a9860c96d8ef5a958056f239d8a18e98;p=spider.git

diff --git a/perl/DXUtil.pm b/perl/DXUtil.pm
index 6c3ff30a..1291db39 100644
--- 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
@@ -64,12 +71,17 @@ sub cltounix
 {
 	my $date = shift;
 	my $time = shift;
+	my ($thisyear) = (gmtime)[5] + 1900;
 
 	return 0 unless $date =~ /^\s*(\d+)-(\w\w\w)-([12][90]\d\d)$/;
+	return 0 if $3 > 2036;
+	return 0 unless abs($thisyear-$3) <= 1;
 	$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
@@ -164,3 +176,11 @@ 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 '^' . $in . '$';
+}