NAME

inq_open_segment − return information about the currently open segment

SYNOPSIS

C Syntax:

void inq_open_segment(fildes,segno,seg_open)
int fildes,*segno,*seg_open;

FORTRAN77 Syntax:

subroutine inq_open_segment(fildes,segno,seg_open)
integer*4 fildes,segno,seg_open

Pascal Syntax:

procedure inq_open_segment(fildes:integer;
var segno,seg_open:integer);

DESCRIPTION

Input Parameters

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

Output Parameters

segno Name of currently open segment. 

seg_open Flag indicating whether or not there is an open segment:

FALSE (0): no open segment
TRUE (1): segment open

Discussion

Inq_open_segment returns information about the currently open segment of the specified graphics device. 

If a segment is open, inq_open_segment returns the name of the currently open segment in segno and seg_open is set to TRUE (1).  If a segment is not open, inq_open_segment leaves segno unchanged and seg_open is set to FALSE (0). 

ERRORS

1 Graphics device is not initialized for this operation. 

SEE ALSO

open_segment(3G)

Hewlett-Packard Company  —  December 25, 1986