include <imhdr.h>
include <iraf77.h>

# UIGS3? -- get a section from an apparently 3-d file

procedure uigs3s (im, xmin, xmax, ymin, ymax, zmin, zmax, buffer, istat)

pointer im           # pointer to the image header file
int xmin             # x-pixel lower limit
int xmax             # x-pixel upper limit
int ymin             # y-pixel lower limit
int ymax             # y-pixel upper limit
int zmin             # z-pixel lower limit
int zmax             # z-pixel upper limit
short buffer[ARB]    # user's buffer to be filled by this routine
int istat            # return status code

pointer ip, imgs3s()
int npix

begin
	istat = ER_OK

	# get the size of a section
	npix = xmax - xmin + 1
	npix = npix * (ymax - ymin + 1)
	npix = npix * (zmax - zmin + 1)

	# call imio to read the data into an imio buffer area
	iferr (ip = imgs3s(im, xmin, xmax, ymin, ymax, zmin, zmax)) {
		istat = ER_IMREAD
		return
		}
	# load the user's array from imio buffer
	call amovs (Mems[ip], buffer, npix)

end