ObjFW  Check-in [5a75edd60e]

 *
 * \param fmt A format string which generates the string to append
 * \param args The arguments used in the format string
 */
- (void)appendFormat: (OFString*)fmt
       withArguments: (va_list)args;

/**
 * Prepends another OFString to the OFString.
 *
 * \param str An OFString to prepend
 */
- (void)prependString: (OFString*)str;

/**
 * Reverse the OFString.
 */
- (void)reverse;

/**
 * Upper the OFString.

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

- (void)prependString: (OFString*)str
{
	return [self insertString: str
			  atIndex: 0];
}

- (void)reverse
{
	size_t i, j, len = length / 2;

	madvise(string, len, MADV_SEQUENTIAL);