petsc-3.11.4 2019-09-28
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PetscOptionsHasName

 Determines whether a certain option is given in the database. This returns true whether the option is a number, string or boolean, even 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 Parameters

set -PETSC_TRUE if found else PETSC_FALSE.

Notes

Name cannot be simply "-h".

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(), PetscOptionsHead(), PetscOptionsStringArray(),PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(), PetscOptionsFList(), PetscOptionsEList()

Level

beginner

Location

src/sys/objects/options.c

Examples

src/vec/vec/examples/tutorials/ex9.c.html
src/vec/vec/examples/tutorials/ex9f.F90.html
src/vec/vec/examples/tutorials/ex14f.F90.html
src/mat/examples/tutorials/ex16.c.html
src/ksp/ksp/examples/tutorials/ex2f.F90.html
src/ksp/ksp/examples/tutorials/ex6f.F90.html
src/ksp/ksp/examples/tutorials/ex11f.F90.html
src/ksp/ksp/examples/tutorials/ex14f.F90.html
src/ksp/ksp/examples/tutorials/ex15f.F90.html
src/snes/examples/tutorials/ex1.c.html
src/snes/examples/tutorials/ex3.c.html

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