How to predict size of outcome of vsprintf?

[Henry Spencer]

In article <9979 at bloom-beacon.MIT.EDU> scs at adam.pika.mit.edu (Steve Summit) writes:
>My own soon-to-be-released stdio replacement contains
>
>	char *smprintf(char *fmt, ...)

I would urge changing the name, perhaps to msprintf, to avoid a name that
looks very similar to snprintf at first glance.
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