Name

PQOPST − Returns open structure status and structure identifier. 

Operating States: PHOP, ∗, ∗, ∗
PHIGS standard function
 

Syntax

PQOPST (ERRIND, STYPE, STRID)

Argument          Data Type      Access    Description
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ERRIND            Integer        Write     Error indicator
STYPE             Integer        Write     Open structure status
STRID             Integer        Write     Structure identifier
---------------------------------------------------------------------------

Constants

Defined Argument     Constant     Description
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STYPE                PNONST       No structures open
                     POPNST       Structures open
---------------------------------------------------------------------------

Description

PQOPST queries the structure state list and returns the open structure status and the structure identifier.  If a structure is open, the returned structure status is POPNST and Digital PHIGS returns the identifier of the open structure as the structure identifier.  If no structure is open, the returned structure status is PNONST and the structure identifier is undefined. 

See Also

PCLST
PQSTRS
PQSTST
POPST