ObjFW  Diff

			length = strlen(str);

			switch (check_utf8(str, length)) {
			case 1:
				is_utf8 = YES;
				break;
			case -1:
				c = [self class];
				[super free];
				@throw [OFInvalidEncodingException
				    newWithClass: c];
			}

			@try {
				string = [self getMemWithSize: length + 1];

    andArguments: (va_list)args
{
	int t;
	Class c;

	if ((self = [super init])) {
		if (fmt == NULL) {
			c = [self class];
			[super free];
			@throw [OFInvalidFormatException newWithClass: c];
		}

		if ((t = vasprintf(&string, fmt, args)) == -1) {
			c = [self class];
			[super free];
			@throw [OFInitializationFailedException
			    newWithClass: c];
		}
		length = t;

		switch (check_utf8(string, length)) {
		case 1:
			is_utf8 = YES;
			break;
		case -1:
			free(string);
			c = [self class];
			[super free];
			@throw [OFInvalidEncodingException newWithClass: c];
		}

		@try {
			[self addToMemoryPool: string];
		} @catch (OFException *e) {

		is_utf8 = YES;
		break;
	case -1:
		string = NULL;
		length = 0;
		is_utf8 = NO;

		@throw [OFInvalidEncodingException newWithClass: [self class]];
	}

	length = len;
	string = [self getMemWithSize: length + 1];
	memcpy(string, str, length + 1);

	return self;

	return YES;
}

- (int)compare: (id)obj
{
	if (![obj isKindOf: [OFString class]] &&
	    ![obj isKindOf: [OFConstString class]])
		@throw [OFInvalidArgumentException newWithClass: [self class]];

	return strcmp(string, [obj cString]);
}

- (uint32_t)hash
{
	uint32_t hash;

	strlength = strlen(str);

	switch (check_utf8(str, strlength)) {
	case 1:
		is_utf8 = YES;
		break;
	case -1:
		@throw [OFInvalidEncodingException newWithClass: [self class]];
	}

	newlen = length + strlength;
	newstr = [self resizeMem: string
			  toSize: newlen + 1];

	memcpy(newstr + length, str, strlength + 1);

- appendWithFormatCString: (const char*)fmt
	     andArguments: (va_list)args
{
	char *t;

	if (fmt == NULL)
		@throw [OFInvalidFormatException newWithClass: [self class]];

	if ((vasprintf(&t, fmt, args)) == -1)
		/*
		 * This is only the most likely error to happen.
		 * Unfortunately, as errno isn't always thread-safe, there's
		 * no good way for us to find out what really happened.
		 */
		@throw [OFNoMemException newWithClass: [self class]];

	@try {
		[self appendCString: t];
	} @finally {
		free(t);
	}

		/* ASCII */
		if (OF_LIKELY(!(string[i] & 0x80)))
			continue;

		/* A start byte can't happen first as we reversed everything */
		if (OF_UNLIKELY(string[i] & 0x40)) {
			madvise(string, len, MADV_NORMAL);
			@throw [OFInvalidEncodingException
			    newWithClass: [self class]];
		}

		/* Next byte must not be ASCII */
		if (OF_UNLIKELY(length < i + 1 || !(string[i + 1] & 0x80))) {
			madvise(string, len, MADV_NORMAL);
			@throw [OFInvalidEncodingException
			    newWithClass: [self class]];
		}

		/* Next byte is the start byte */
		if (OF_LIKELY(string[i + 1] & 0x40)) {
			string[i] ^= string[i + 1];
			string[i + 1] ^= string[i];
			string[i] ^= string[i + 1];

			i++;
			continue;
		}

		/* Second next byte must not be ASCII */
		if (OF_UNLIKELY(length < i + 2 || !(string[i + 2] & 0x80))) {
			madvise(string, len, MADV_NORMAL);
			@throw [OFInvalidEncodingException
			    newWithClass: [self class]];
		}

		/* Second next byte is the start byte */
		if (OF_LIKELY(string[i + 2] & 0x40)) {
			string[i] ^= string[i + 2];
			string[i + 2] ^= string[i];
			string[i] ^= string[i + 2];

			i += 2;
			continue;
		}

		/* Third next byte must not be ASCII */
		if (OF_UNLIKELY(length < i + 3 || !(string[i + 3] & 0x80))) {
			madvise(string, len, MADV_NORMAL);
			@throw [OFInvalidEncodingException
			    newWithClass: [self class]];
		}

		/* Third next byte is the start byte */
		if (OF_LIKELY(string[i + 3] & 0x40)) {
			string[i] ^= string[i + 3];
			string[i + 3] ^= string[i];
			string[i] ^= string[i + 3];

			string[i + 1] ^= string[i + 2];
			string[i + 2] ^= string[i + 1];
			string[i + 1] ^= string[i + 2];

			i += 3;
			continue;
		}

		/* UTF-8 does not allow more than 4 bytes per character */
		madvise(string, len, MADV_NORMAL);
		@throw [OFInvalidEncodingException newWithClass: [self class]];
	}

	madvise(string, len, MADV_NORMAL);

	return self;
}

- upper
{
	char *p = string + length;

	if (is_utf8)
		@throw [OFInvalidEncodingException newWithClass: [self class]];

	while (--p >= string)
		*p = toupper((int)*p);

	return self;
}

- lower
{
	char *p = string + length;

	if (is_utf8)
		@throw [OFInvalidEncodingException newWithClass: [self class]];

	while (--p >= string)
		*p = tolower((int)*p);

	return self;
}
@end