PetscOptionsHasName

Determines whether a certain option is given in the database. This returns true whether the option is a number, string or Boolean, even if its value is set to false.

Synopsis

#include "petscsys.h"   
PetscErrorCode PetscOptionsHasName(PetscOptions options, const char pre[], const char name[], PetscBool *set)

Not Collective

Input Parameters

• options - options database, use NULL for default global database

• pre - string to prepend to the name or NULL

• name - the option one is seeking

Output Parameter

• set - PETSC_TRUE if found else PETSC_FALSE.

Note

In many cases you probably want to use PetscOptionsGetBool() instead of calling this, to allowing toggling values.

See Also

PetscOptionsGetInt(), PetscOptionsGetReal(), PetscOptionsGetString(), PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsBool(), PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHeadBegin(), PetscOptionsStringArray(), PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(), PetscOptionsFList(), PetscOptionsEList()

Level

beginner

Location

src/sys/objects/options.c

Examples

src/tao/unconstrained/tutorials/eptorsion3.c
src/snes/tutorials/ex3.c
src/tao/unconstrained/tutorials/eptorsion2f.F90
src/vec/vec/tutorials/ex14f.F90
src/tao/bound/tutorials/plate2.c
src/vec/vec/tutorials/ex9.c
src/tao/unconstrained/tutorials/minsurf2.c
src/tao/unconstrained/tutorials/eptorsion1.c
src/vec/vec/tutorials/ex9f.F90
src/tao/bound/tutorials/jbearing2.c

---

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages