Hello all,
I am wondering about the right datatype to use for Hypre routines in a Fortran code.
The Hypre manual provides a conversion table from C to Fortran on page 80
https://hypre.readthedocs.io/_/downloads/en/latest/pdf/
but the small example that follows is a bit contradictory. To be exact:
The table on page 80 says: Instead of C "Hypre_Type" use Fortran "integer*8".
On the next page they give the example of
HYPRE_IJMatrixSetValues(HYPRE_IJMatrix matrix, int nrows, ...)
and they say that Fortran types should be
integer*8 :: matrix
integer :: nrows
However, the documentation of HYPRE_IJMatrixSetValues on page 102
actually has the signature
HYPRE_IJMatrixSetValues(HYPRE_IJMatrix matrix, HYPRE_Int nrows, ...)
So apparently "HYPRE_Int" is not to be misunderstood as "Hypre_Type", which would be replaced by integer*8, but instead as a plain integer, i.e. integer*4 in Fortran.
Can you confirm that?
Also is that Hypre_Int always an integer*4 or is it adjusted to match PETScInt?
Best regards,
Bastian Löhrer
Dipl.-Ing. Bastian Löhrer
Technische Universität Dresden
Fakultät für Maschinenwesen
Institut für Strömungsmechanik
01062 Dresden
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