petsc-3.14.5 2021-03-03
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# PetscIntSumTruncate

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

### Synopsis

    PETSC_STATIC_INLINE PetscInt PetscIntSumTruncate(PetscInt a,PetscInt b)

Not Collective

### Input Parameter

| a | - the PetscInt value
| b | - the second value

### Returns

the result as a PetscInt value

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

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

Not available from Fortran

### See Also

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

### Level

advanced

### Location

include/petscsys.h
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages