Index: src/OFString.h
==================================================================
--- src/OFString.h
+++ src/OFString.h
@@ -305,10 +305,16 @@
  * \return The index of the last occurrence of the string or SIZE_MAX if it
  *	   was not found
  */
 - (size_t)indexOfLastOccurrenceOfString: (OFString*)str;
 
+/**
+ * \param str The string to search
+ * \return Whether the string contains the specified string
+ */
+- (BOOL)containsString: (OFString*)str;
+
 /**
  * \param start The index where the substring starts
  * \param end The index where the substring ends.
  *	      This points BEHIND the last character!
  * \return The substring as a new autoreleased OFString

Index: src/OFString.m
==================================================================
--- src/OFString.m
+++ src/OFString.m
@@ -888,10 +888,29 @@
 		/* Did not match and we're at the last char */
 		if (i == 0)
 			return SIZE_MAX;
 	}
 }
+
+- (BOOL)containsString: (OFString*)str
+{
+	const char *str_c = [str cString];
+	size_t str_len = [str cStringLength];
+	size_t i;
+
+	if (str_len == 0)
+		return YES;
+
+	if (str_len > length)
+		return NO;
+
+	for (i = 0; i <= length - str_len; i++)
+		if (!memcmp(string + i, str_c, str_len))
+			return YES;
+
+	return NO;
+}
 
 - (OFString*)substringFromIndex: (size_t)start
 			toIndex: (size_t)end
 {
 	if ([self isUTF8]) {