ObjFW  Diff

 * \param index The index of the Unicode character to return
 * \return The Unicode character at the specified index
 */
- (of_unichar_t)characterAtIndex: (size_t)index;

/**
 * \param str The string to search
 * \return The index of the first occurrence of the string or SIZE_MAX if it
 *	   was not found
 * \return The index of the first occurrence of the string or OF_INVALID_INDEX
 *	   if it was not found
 */
- (size_t)indexOfFirstOccurrenceOfString: (OFString*)str;

/**
 * \param str The string to search
 * \return The index of the last occurrence of the string or SIZE_MAX if it
 *	   was not found
 * \return The index of the last occurrence of the string or OF_INVALID_INDEX if
 *	   it was not found
 */
- (size_t)indexOfLastOccurrenceOfString: (OFString*)str;

/**
 * \param str The string to search
 * \return Whether the string contains the specified string
 */