graPHIGS Programming Interface: Subroutine Reference

The graPHIGS Programming Interface : Subroutine Reference

GPQRV - Inquire Set of Roots in View

GPQRV (wsid, view, start, number, errind, totnum, strid, priority)

Note:

This subroutine is a Workstation State List (WSL) inquiry. For an overview, see "WSL Inquiries"

Purpose

Use GPQRV to inquire a list of the root structure identifiers associated with the specified view.

Structure identifiers returned by this subroutine are those in the structure store associated with the view.

If the inquired information is available, then the graPHIGS API sets the error indicator to zero and returns the values in the output parameters. If the error indicator is 543 (the start value exceeds the extent of the available data), then only the total number (totnum) parameter is set. If the inquired information is unavailable, then the error indicator (errind) contains an error number indicating the reason, and the values returned in the output parameters are unpredictable.

Parameters

wsid -- specified by user, fullword integer

Workstation identifier.

view -- specified by user, fullword integer

View index (>=0)

start -- specified by user, fullword integer

Starting member of the list of structure identifiers (>=1)

number -- specified by user, fullword integer

Number of structure identifiers requested (>=0)

errind -- returned by the graPHIGS API, fullword integer

Error indicator. If the error indicator is zero, the request has been completed. Otherwise, one of the following errors exists:

25: SPECIFIED WORKSTATION DOES NOT EXIST
35: WORKSTATION HAS ONLY INPUT CAPABILITIES
59: VIEW INDEX VALUE < ZERO
323: VIEW INDEX EXCEEDS VIEW TABLE CAPACITY
538: START VALUE < ONE
539: REQUESTED NUMBER < ZERO
543: START EXCEEDS DATA EXTENT. TOTAL NUMBER AVAILABLE RETURNED

totnum -- returned by the graPHIGS API, fullword integer

Total number of the roots in the view.

strid -- returned by the graPHIGS API, array of fullword integers

List of root structure identifiers.

priority -- returned by the graPHIGS API, array of short floating-point numbers

List of root priorities.

Error Codes

None

Related Subroutines

GPARV: Associate Root with View

RCP code

201337095 ( X'0C002907')