On Tuesday, 14 August 2012 at 21:33:34 UTC, Jonathan M Davis
wrote:
On Tuesday, August 14, 2012 23:28:08 Andrew Spott wrote:
This appears to be the correct answer. I was mostly just
confused. something #defined is just replaced by the C
preprocessor (or so I thought), which means that in C, you
would
be passing 0 to PetscInitialize... which seems weird.
0 _is_ the null value in C. What's weird is that they had a
non-standard macro
for it (NULL is frequently used, but PETSC_NULL is not standard
at all).
- Jonathan M Davis
There is some explanation in the header. PETSC tries to be as
portable as possible, apparently there is some weird cases where
0 *isn't* the default value for NULL.
