ObjFW  Diff

	str_len = [str cStringLength];

	i = j = 0;

	while (i < length && j < str_len) {
		of_unichar_t c1, c2;
		size_t l1, l2;
		of_unichar_t tmp;

		l1 = of_string_utf8_to_unicode(string + i, length - i, &c1);
		l2 = of_string_utf8_to_unicode(str_cstr + j, str_len - j, &c2);

		if (l1 == 0 || l2 == 0 || c1 > 0x10FFFF || c2 > 0x10FFFF)
			@throw [OFInvalidEncodingException newWithClass: isa];

		if (c1 >> 8 < OF_UNICODE_CASEFOLDING_TABLE_SIZE) {
			if (of_unicode_casefolding_table[c1 >> 8] == NULL)
				c1 += of_unicode_lower_table[c1 >> 8]
			of_unichar_t tc =
				    [c1 & 0xFF];
			else {
				tmp = of_unicode_casefolding_table[c1 >> 8]
			    of_unicode_casefolding_table[c1 >> 8][c1 & 0xFF];
				    [c1 & 0xFF];

				if (tmp != 0)
					c1 = tmp;
			}
		}
			if (tc)
				c1 = tc;
		}


		if (c2 >> 8 < OF_UNICODE_CASEFOLDING_TABLE_SIZE) {
			if (of_unicode_casefolding_table[c2 >> 8] == NULL)
				c2 += of_unicode_lower_table[c2 >> 8]
			of_unichar_t tc =
				    [c2 & 0xFF];
			else {
				tmp = of_unicode_casefolding_table[c2 >> 8]
			    of_unicode_casefolding_table[c2 >> 8][c2 & 0xFF];
				    [c2 & 0xFF];

				if (tmp != 0)
					c2 = tmp;
			if (tc)
				c2 = tc;
			}
		}

		if (c1 > c2)
			return OF_ORDERED_DESCENDING;
		if (c1 < c2)
			return OF_ORDERED_ASCENDING;