Is "if (!pointer)" as portable as "if (pointer == NULL)" ???

[D'Arcy J.M. Cain]

In article <1461 at tkou02.enet.dec.com> diamond at tkou02.enet.dec.com (diamond at tkovoa) writes:
>In article <656 at hades.OZ> greyham at hades.OZ (Greyham Stoney) writes:
> [...]
>>	if (buffer) free(buffer)
>
>This is also portable, and almost readable.  Again, to be really readable,
>you should still compare to NULL, but I grant that it would make your
>source code longer this time.
>
I know that NULL == 0 but I can't help feeling nervous about it.  I always
use something like "if (buffer == NULL)" and assume that the optimiser will
do the right thing.  Am I too paranoid or is this good defensive programming?


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