It appears that, according to the standard, passing NULL to memcmp is
undefined behavior, even if the count is 0. See
http://stackoverflow.com/questions/16362925/can-i-pass-a-null-pointer-to-memcmp
for C99 and C++ standard references. I didn't see a good reference for C89
but I find it almost impos
On Sun, Dec 12, 2010 at 8:16 AM, Tom Lane wrote:
> > What are the values of _S_IREAD and _S_IWRITE, anyway? I'm still
> > wondering how come the previous coding with hardwired constants
> > behaved correctly.
>
> Still curious about this.
>
> FWIW, _S_IREAD and _S_IWRITE are defined by Visual St
