ObjFW  Diff

of_string_index_to_position(const char *str, size_t idx, size_t len)
{
	size_t i;

	for (i = 0; i <= idx; i++)
		if (OF_UNLIKELY((str[i] & 0xC0) == 0x80))
			if (++idx > len)
				return SIZE_MAX;
				return OF_INVALID_INDEX;

	return idx;
}

@implementation OFString
+ string
{

	size_t str_len = [str cStringLength];
	size_t i;

	if (str_len == 0)
		return 0;

	if (str_len > length)
		return SIZE_MAX;
		return OF_INVALID_INDEX;

	for (i = 0; i <= length - str_len; i++)
		if (!memcmp(string + i, str_c, str_len))
			return of_string_position_to_index(string, i);

	return SIZE_MAX;
	return OF_INVALID_INDEX;
}

- (size_t)indexOfLastOccurrenceOfString: (OFString*)str
{
	const char *str_c = [str cString];
	size_t str_len = [str cStringLength];
	size_t i;

	if (str_len == 0)
		return of_string_position_to_index(string, length);

	if (str_len > length)
		return SIZE_MAX;
		return OF_INVALID_INDEX;

	for (i = length - str_len;; i--) {
		if (!memcmp(string + i, str_c, str_len))
			return of_string_position_to_index(string, i);

		/* Did not match and we're at the last char */
		if (i == 0)
			return SIZE_MAX;
			return OF_INVALID_INDEX;
	}
}

- (BOOL)containsString: (OFString*)str
{
	const char *str_c = [str cString];
	size_t str_len = [str cStringLength];