ObjFW  Diff

	for (i = 0; i <= s->cStringLength - cStringLength; i++)
		if (!memcmp(s->cString + i, cString, cStringLength))
			return YES;

	return NO;
}

- (OFString*)substringFromIndex: (size_t)start
			toIndex: (size_t)end
{
	if (start > end)
		@throw [OFInvalidArgumentException newWithClass: isa
						       selector: _cmd];


	if (end > s->length)
		@throw [OFOutOfRangeException newWithClass: isa];

	if (s->isUTF8) {
		start = of_string_index_to_position(s->cString, start,
		    s->cStringLength);
		end = of_string_index_to_position(s->cString, end,
		    s->cStringLength);
	}

	return [OFString stringWithCString: s->cString + start
				    length: end - start];
}

- (OFString*)substringWithRange: (of_range_t)range
{
	return [self substringFromIndex: range.start
				toIndex: range.start + range.length];
}

- (OFString*)stringByAppendingString: (OFString*)string
{
	OFMutableString *new;

	new = [OFMutableString stringWithString: self];
	[new appendString: string];