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#

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/minsurf2.c
src/tao/bound/tutorials/jbearing2.c
src/snes/tutorials/ex19.c
src/tao/unconstrained/tutorials/eptorsion3.c
src/snes/tutorials/ex70.c
src/snes/tutorials/ex1.c
src/tao/unconstrained/tutorials/eptorsion1.c
src/tao/bound/tutorials/plate2.c
src/snes/tutorials/ex3.c
src/vec/vec/tutorials/ex9.c


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