ObjFW  Diff

		char *name;

		if ((keyLength = key.UTF8StringLength) < 1) {
			objc_autoreleasePoolPop(pool);
			return [self valueForUndefinedKey: key];
		}

		if ((name = malloc(keyLength + 3)) == NULL)
		name = of_malloc(1, keyLength + 3);
			@throw [OFOutOfMemoryException
			    exceptionWithRequestedSize: keyLength + 3];

		@try {
			memcpy(name, "is", 2);
			memcpy(name + 2, key.UTF8String, keyLength);
			name[keyLength + 2] = '\0';

			name[2] = of_ascii_toupper(name[2]);

			selector = sel_registerName(name);
		} @finally {
			free(name);
			of_free(name);
		}

		methodSignature = [self methodSignatureForSelector: selector];

		if (methodSignature == NULL) {
			objc_autoreleasePoolPop(pool);
			return [self valueForUndefinedKey: key];

	if ((keyLength = key.UTF8StringLength) < 1) {
		objc_autoreleasePoolPop(pool);
		[self	   setValue: value
		    forUndefinedKey: key];
		return;
	}

	if ((name = malloc(keyLength + 5)) == NULL)
	name = of_malloc(1, keyLength + 5);
		@throw [OFOutOfMemoryException
		    exceptionWithRequestedSize: keyLength + 5];

	@try {
		memcpy(name, "set", 3);
		memcpy(name + 3, key.UTF8String, keyLength);
		memcpy(name + keyLength + 3, ":", 2);

		name[3] = of_ascii_toupper(name[3]);

		selector = sel_registerName(name);
	} @finally {
		free(name);
		of_free(name);
	}

	methodSignature = [self methodSignatureForSelector: selector];

	if (methodSignature == nil ||
	    methodSignature.numberOfArguments != 3 ||
	    *methodSignature.methodReturnType != 'v' ||