PetscOptionsRangeReal#
Gets a PetscReal value within a range of values for a particular option in the database.
Synopsis#
#include <petscoptions.h>
PetscErrorCode PetscOptionsRangeReal(const char opt[], const char text[], const char man[], PetscReal currentvalue, PetscReal *value, PetscBool *set, PetscReal lb, PetscReal ub)
Logically Collective on the communicator passed in PetscOptionsBegin()
Input Parameters#
- opt - option name 
- text - short string that describes the option 
- man - manual page with additional information on option 
- currentvalue - the current value; caller is responsible for setting this value correctly. Normally this is done with either 
  PetscOptionsRangeReal(..., obj->value, &obj->value, ...)
or
  value = defaultvalue
  PetscOptionsRangeReal(..., value, &value, &set, ...);
  if (set) {
- lb - the lower bound, provided value must be greater than or equal to this value or an error is generated 
- ub - the upper bound, provided value must be less than or equal to this value or an error is generated 
Output Parameters#
- value - the value to return 
- set - - PETSC_TRUEif found, else- PETSC_FALSE
Notes#
If the user does not supply the option at all value is NOT changed. Thus
you should ALWAYS initialize value if you access it without first checking that set is PETSC_TRUE.
The currentvalue passed into this routine does not get transferred to the output value variable automatically.
Must be used between a PetscOptionsBegin() and a PetscOptionsEnd()
See Also#
PetscOptionsInt(), PetscOptionsGetReal(), PetscOptionsHasName(), PetscOptionsGetString(), PetscOptionsGetInt(),
PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsGetBool(), PetscOptionsBoundedInt()
PetscOptionsInt(), PetscOptionsString(), PetscOptionsReal(), PetscOptionsBool(),
PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHeadBegin(),
PetscOptionsStringArray(), PetscOptionsRealArray(), PetscOptionsScalar(),
PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(),
PetscOptionsFList(), PetscOptionsEList(), PetscOptionsRangeInt(), PetscOptionsBoundedReal()
Level#
beginner
Location#
Examples#
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages