Date: Fri, 10 Dec 1999 20:39:16 -0800 (PST)
From: Richard Frost <frost@XXXXXXXX>
To: mpi-core@XXXXXXXXXXX
cc: nissej@XXXXXXXXXX
Subject: Re: Fwd: Re: MPI_GET_PROCESSOR_NAME \0 or not?
Sender: owner-mpi-core@XXXXXXXXXXX


As a Fortran programmer, I would expect the behavior Dick describes
below.


On Fri, 10 Dec 1999 treumann@XXXXXXXXXX wrote:

> I agree that the IBM implementation has this bug involving
> MPI_GET_PROCESSOR_NAME in Fortran.  We had already identified and fixed the
> bug in our development stream and now expect to  fix it in existing
> releases via PTF as well.
> 
> My interpretation of the correct response is that the Fortran character
> array passed in must be of length MPI_MAX_PROCESSOR_NAME so the character
> array output should be that length, left justified & blank filled.   The
> resultlen parameter should report how many characters represent the real
> result, not counting the blanks.  I propose this be the clarification but,
> because I am not an expert at Fortran's treatment of character strings I
> could be persuaded Bill is correct.
> 
> I would welcome a prompt consensus.
> 
>  Nil's had contacted IBM service about this problem and felt he was engaged
> with IBM in a debate about the standard. I do not think the service
> representative he dealt with intended to debate the issue, only to make
> sure the issue was well defined and plausible before bringing the question
> to me.    I thank Nils for raising the issue and making his point
> effectively.
> 
>         Dick
> 
> Dick Treumann                IBM RS/6000 SP Development
> Tele (914) 433-7846         Fax (914) 433-8363
> 
> 
> William Gropp <gropp@XXXXXXXXXXX>@mcs.anl.gov on 12/09/99 04:06:58 PM> 
> Sent by:  owner-mpi-core@XXXXXXXXXXX
> 
> 
> To:   mpi-core@XXXXXXXXXXX
> cc:
> Subject:  Fwd: Re: MPI_GET_PROCESSOR_NAME \0 or not?
> 
> 
> 
> The following question has come up.  I agree with the questioner; the '\0'
> shouldn't be written in the Fortran version because it is not part of the
> name, and resultlen is not described as specifying the valid part of the
> return result.  I propose the clarification to MPI_GET_PROCESSOR_NAME:
> 
> Only the first resultlen characters of name are modified by
> MPI_GET_PROCESSOR_NAME.
> 
> Bill
> 
> <Nils Jonsson's discussion of issue snipped - Dick T>
> 
> 
>