graPHIGS Programming Interface: Subroutine Reference

The graPHIGS Programming Interface : Subroutine Reference

GPQLI - Inquire List of Logical Input Devices

GPQLI (wstype, class, start, number, errind, ndev, dev)

Note:

This subroutine is a Workstation Description Table (WDT) inquiry. For an overview, see "WDT Inquiries"

Purpose

Use GPQLI to inquire the number of available logical input devices for the specified device class for the specified workstation type.

The graPHIGS API returns data indicating the total number of logical input devices and their device numbers for the specified class.

If the information is available, then the graPHIGS API sets the error indicator to zero and returns the values in the output parameter. 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 the error number indicating the reason, and the values returned in the output parameter are unpredictable.

Parameters

wstype -- specified by user, 8-byte character string

Workstation type.

class -- specified by user, fullword integer

Device class (1=LOCATOR, 2=STROKE, 3=VALUATOR, 4=CHOICE, 5=PICK, 6=STRING )

start -- specified by user, fullword integer

Starting member of the list of input devices (>=1)

number -- specified by user, fullword integer

Number of input device numbers 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:

23: SPECIFIED WORKSTATION TYPE DOES NOT EXIST
38: WORKSTATION HAS ONLY OUTPUT CAPABILITIES
328: INPUT CLASS VALUE IS INVALID
538: START VALUE < ONE
539: REQUESTED NUMBER < ZERO
543: START EXCEEDS DATA EXTENT. TOTAL NUMBER AVAILABLE RETURNED
548: SPECIFIED WORKSTATION TYPE CANNOT BE LOADED

ndev -- returned by the graPHIGS API, fullword integer

Total number of logical device numbers in the device class.

dev -- returned by the graPHIGS API, array of fullword integers.

List of device numbers in the device class. The output array must be large enough for the requested data.

Error Codes

None

Related Subroutines

GPQRCT: Inquire Realized Connection Type

RCP code

201339662 (X'0C00330E')