Re: sprintf usage

[Pawel Kot]

Hi,

On 5/5/06, E. Rosten <address@hidden> wrote:
> > There seems to be a problem with gnokii sources and some compilers. I
> > got the report from FC4 and gcc version 4.0.2 20051125. The problem is
> > with interpretation of:
> > sprintf(buffer, "%s%d", buffer, digit);
>
> > It used to work so far but under FC4 it behaves always in the was as
> > buffer was empty (regardles of buffer contents) and the result string
> > is always the digit.
>
> What is the expected benaviour? Is it essentially appending %d digit to
> the end of the buffer.

That is expected behaviour. But in the case above it is always the
last appended digit (ie. one char).

> > Is it a bug in gcc or is it misuse of sprintf?
>
> These things tend to be quite ill specified in the standard, so I would
> expect that it is a misuse. The bast place to ask is probably
> comp.lang.c.moderated

Well, I already changed this to I think safe solution. But thanks anyway.

> Also, wouldn't it be better to use snprintf as a general rule?

It is, but doesn't solve the problem.

take care,
pkot
--
Pawel Kot
http://www.gnokii.org/