PetscIntSumTruncate#

Computes the sum of two positive PetscInt and truncates the value to slightly less than the maximal possible value

Synopsis#

Not Collective; No Fortran Support

Input Parameters#

  • a - the PetscInt value

  • b - the second value

Returns#

the result as a PetscInt value

Notes#

Use PetscInt64Mult() to compute the product of two PetscInt as a PetscInt64

Use PetscRealIntMultTruncate() to compute the product of a PetscReal and a PetscInt and truncate to fit a PetscInt

Use PetscIntMultError() to compute the product of two PetscInt if you wish to generate an error if the result will not fit in a PetscInt

Developers Notes#

This is used where we compute approximate sizes for workspace and need to insure the workspace is index-able.

See Also#

PetscBLASInt, PetscMPIInt, PetscInt, PetscBLASIntCast(), PetscInt64Mult(), PetscIntMultError()

Level#

advanced

Location#

include/petscsys.h


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