X-Git-Url: http://dxcluster.net/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl%2FDXUtil.pm;h=2c05372c0f31b2d198a8959900ef8e2827b44817;hb=c5e90df0d93d141f8687556a708068521b9b8f77;hp=aad4696565e1a9e8a709572b8467432b9fa7d011;hpb=88665a2bed3b9ec9e97237938a95a045b2a21bb4;p=spider.git

diff --git a/perl/DXUtil.pm b/perl/DXUtil.pm
index aad46965..2c05372c 100644
--- a/perl/DXUtil.pm
+++ b/perl/DXUtil.pm
@@ -16,7 +16,8 @@ require Exporter;
 @ISA = qw(Exporter);
 @EXPORT = qw(atime ztime cldate cldatetime slat slong yesno promptf 
 			 parray parraypairs shellregex readfilestr writefilestr
-             print_all_fields cltounix iscallsign unpad
+             print_all_fields cltounix iscallsign unpad is_callsign
+			 is_freq is_digits is_pctext is_pcflag insertitem deleteitem
             );
 
 @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
@@ -284,11 +285,59 @@ sub writefilestr
 sub unpad
 {
 	my $s = shift;
-	$s =~ s/^\s+|\s+$//;
+	$s =~ s/\s+$//;
+	$s =~ s/^\s+//;
 	return $s;
 }
 
+# check that a field only has callsign characters in it
+sub is_callsign
+{
+	return $_[0] =~ /^[A-Z0-9\-]+$/;
+}
+
+# check that a PC protocol field is valid text
+sub is_pctext
+{
+	return $_[0] =~ /^[\x09\x20-\xFF]+$/;
+}
 
+# check that a PC prot flag is fairly valid (doesn't check the difference between 1/0 and */-)
+sub is_pcflag
+{
+	return $_[0] =~ /^[01\*\-]+$/;
+}
+
+# check that a thing is a frequency
+sub is_freq
+{
+	return $_[0] =~ /^[\d\.]+$/;
+}
 
+# check that a thing is just digits
+sub is_digits
+{
+	return $_[0] =~ /^[\d]+$/;
+}
 
+# insert an item into a list if it isn't already there returns 1 if there 0 if not
+sub insertitem
+{
+	my $list = shift;
+	my $item = shift;
+	
+	return 1 if grep {$_ eq $item } @$list;
+	push @$list, $item;
+	return 0;
+}
 
+# delete an item from a list if it is there returns no deleted 
+sub deleteitem
+{
+	my $list = shift;
+	my $item = shift;
+	my $n = @$list;
+	
+	@$list = grep {$_ ne $item } @$list;
+	return $n - @$list;
+}