[URL] portable vsnprintf

[Igor Homyakov]

<cite>
There are problems using vsnprintf() portably. When the provided buffer
is not large enough to hold the entire formatted string, the string will be
truncated. However, it can be difficult to determine if the formatted string
actually has been truncated or not. The return values vary from system to
system.
</cite>

http://alphazed.com/programming/vsnprintf.php
-- 
Igor Homyakov
<homyakov AT ramax.spb.ru>