ObjFW  Diff

	if (fd == -1 || eos || (ret = write(fd, buf, size)) < size)
		@throw [OFWriteFailedException newWithClass: isa
						       size: size];

	return ret;
}

- _seekToOffset: (off_t)offset
{
	if (lseek(fd, offset, SEEK_SET) == -1)
		@throw [OFSeekFailedException newWithClass: isa];

	return self;
}

- (size_t)_seekForwardWithOffset: (off_t)offset
{
	off_t ret;

	if ((ret = lseek(fd, offset, SEEK_CUR)) == -1)

	if ((ret = lseek(fd, offset, SEEK_END)) == -1)
		@throw [OFSeekFailedException newWithClass: isa];

	return ret;
}

- close
{
	if (fd != -1)
		close(fd);
	fd = -1;

	return self;
}

- (void)dealloc
{
	if (closable && fd != -1)
		close(fd);