1 files changed, 35 insertions, 0 deletions
diff --git a/Source/SPStringAdditions.m b/Source/SPStringAdditions.m
index 1f9f2738..1185756b 100644
--- a/Source/SPStringAdditions.m
+++ b/Source/SPStringAdditions.m
@@ -157,6 +157,41 @@
 }
 
 /**
+ * Returns ROT13 representation
+ */
+- (NSString *)rot13
+{
+	NSMutableString *holder = [[NSMutableString alloc] init];
+	unichar theChar;
+	int i;
+
+	for(i = 0; i < [self length]; i++) {
+		theChar = [self characterAtIndex:i];
+		if(theChar <= 122 && theChar >= 97) {
+			if(theChar + 13 > 122)
+				theChar -= 13;
+			else 
+				theChar += 13;
+			[holder appendFormat:@"%C", (char)theChar];
+
+
+		} else if(theChar <= 90 && theChar >= 65) {
+			if((int)theChar + 13 > 90)
+				theChar -= 13;
+			else
+				theChar += 13;
+
+			[holder appendFormat:@"%C", theChar];
+
+		} else {
+			[holder appendFormat:@"%C", theChar];
+		}
+	}
+
+	return [NSString stringWithString:holder];
+}
+
+/**
  * Escapes HTML special characters.
  */
 - (NSString *)HTMLEscapeString