NAME

sample_choice − return current choice value

SYNOPSIS

C Syntax:

void sample_choice(fildes,ordinal,valid,value);
int fildes,ordinal,*valid,*value;

FORTRAN77 Syntax:

subroutine sample_choice(fildes,ordinal,
valid,value)
integer*4 fildes,ordinal,valid,value

Pascal Syntax:

procedure sample_choice(fildes,ordinal:integer;
var valid,value:integer);

DESCRIPTION

Input Parameters

fildes Integer file descriptor returned by gopen when an I/O path to a graphics device is opened. 

ordinal Logical device number ranging from 1 to number of devices in this class. 

Output Parameters

valid TRUE (1) if a valid choice was returned,
FALSE (0) otherwise. 

value Current choice value. 

Discussion

Sample_choice returns the current value of the choice device specified by fildes and ordinal.  This is the equivalent of a non-blocking read. 

SEE ALSO

request_choice(3G). 

Hewlett-Packard Company  —  May 11, 2021