NDF_STATE - Determine the state of an NDF component (defined or undefined)

Description:

The routine returns a logical value indicating whether an NDF component has a defined value (or values).

Invocation:

CALL NDF_STATE( INDF, COMP, STATE, STATUS )

Arguments:

INDF = INTEGER (Given)

NDF identifier.

COMP = CHARACTER $*$ ( $*$ ) (Given)

Name of the component; any NDF component name is valid.

STATE = LOGICAL (Returned)

Whether the specified component is defined.

STATUS = INTEGER (Given and Returned)

The global status.

Notes:

• If a component name of 'EXTENSION' is given, then a .TRUE. result will be returned if one or more extensions are present in the NDF.

• A comma-separated list of component names may also be given, in which case the routine will return the logical "AND" of the states of the specified components (i.e. a .TRUE. result will be returned only if all the components have defined values).