PetscOptionsGetEList

Puts a list of option values that a single one may be selected from

Synopsis

#include "petscsys.h"   
PetscErrorCode PetscOptionsGetEList(PetscOptions options, const char pre[], const char opt[], const char *const *list, PetscInt ntext, PetscInt *value, PetscBool *set)

Not Collective

Input Parameters

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

• pre - the string to prepend to the name or NULL

• opt - option name

• list - the possible choices (one of these must be selected, anything else is invalid)

• ntext - number of choices

Output Parameters

• value - the index of the value to return (defaults to zero if the option name is given but no choice is listed)

• set - PETSC_TRUE if found, else PETSC_FALSE

Notes

If the user does not supply the option value is NOT changed. Thus you should ALWAYS initialize value if you access it without first checking that the set flag is true.

See PetscOptionsFList() for when the choices are given in a PetscFunctionList

See Also

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

Level

intermediate

Location

src/sys/objects/options.c

Examples

src/ksp/ksp/tutorials/ex87.c

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