PetscIntMultError#
Computes the product of two positive PetscInt and generates an error with overflow.
Synopsis#
static inline PetscErrorCode PetscIntMultError(PetscInt a, PetscInt b, PetscInt *result)
Not Collective
Input Parameters#
a - the
PetscIntvalueb - the second value
Output Parameter#
result - the result as a
PetscIntvalue, 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 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
Developers Note#
We currently assume that PetscInt addition does not overflow, this is obviously wrong but requires many more checks.
See Also#
PetscBLASInt, PetscMPIInt, PetscInt, PetscBLASIntCast(), PetscIntMult64(), PetscIntSumError()
Level#
advanced
Location#
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages