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; No Fortran Support
Input Parameters#
a - the
PetscInt
valueb - the second value
Output Parameter#
result - the result as a
PetscInt
value, or NULL if you do not want the result, you just want to check if it overflows
Notes#
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
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