petsc-3.7.5 2017-01-01

PetscIntSumTruncate

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

PETSC_STATIC_INLINE PetscInt PetscIntSumTruncate(PetscInt a,PetscInt b)

Not Collective

	a	- the PetscInt value
	b	- the second value

c -the result as a PetscInt value

Use PetscIntMult64bit() to compute the product of two PetscInt as a Petsc64bitInt 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

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