petsc3.12.2 20191122
PetscIntSumError
Computes the sum of two positive PetscInt and generates an error with overflow.
Synopsis
PETSC_STATIC_INLINE PetscErrorCode PetscIntSumError(PetscInt a,PetscInt b,PetscInt *result)
Not Collective
Input Parameter
 a   the PetscInt value

 b   the second value

Output Parameter:ma
c the result as a PetscInt value, or NULL if you do not want the result, you just want to check if it overflows
Use PetscInt64Mult() to compute the product of two 32 bit PetscInt and store in a PetscInt64
Use PetscIntMultTruncate() to compute the product of two PetscInt and truncate it to fit in a PetscInt
Not available from Fortran
See Also
PetscBLASInt, PetscMPIInt, PetscInt, PetscBLASIntCast(), PetscInt64Mult()
Level
advanced
Location
include/petscsys.h
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages