[MOAB-dev] Getting ent set data when tag_size > 1

[Tim Tautges]

Jed Brown wrote:
> On Tue, 13 Apr 2010 08:15:07 -0500, Jason Kraftcheck <kraftche at cae.wisc.edu> wrote:
>> The iMesh interface has always been odd with regards to multi-value 
>> tags.  Just use get/setEntSetData for all data types.
> 
> There ought to be get/setEntSetArrData (in fact, I would only expose the
> array interface because the single-tag versions are crippled and not
> more usable).
> 

Agreed.  I'll put that on the list of extensions to write, and will propose it to itaps (nobody else really uses sets in 
any serious way, so that's probably why it hasn't come up there).

> The values argument should also really be void* so that user code isn't
> required to cast to char* just so the implementation can do pointer
> arithmetic without casting.  The MPI standard also uses void* in place
> of void** to avoid requiring user casts (see the rationale for
> MPI_Comm_get_attr) and I would do this for similar uses in ITAPS,
> e.g. iMesh_getData.  My understanding is that ITAPS started with void*
> and changed, but I'm not aware of the rationale and find MPI's rationale
> to be quite cogent.
> 

This is probably right, but I seem to remember considering that but not being able to do it.  Jason, do you recall 
anything about that?

- tim

> Jed
> 

-- 
================================================================
"You will keep in perfect peace him whose mind is
   steadfast, because he trusts in you."               Isaiah 26:3

              Tim Tautges            Argonne National Laboratory
          (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
          phone: (608) 263-8485      1500 Engineering Dr.
            fax: (608) 263-4499      Madison, WI 53706