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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include "imfort.h"
# IMPS1R -- Put a section to an image of type short or real. Automatic
# datatype conversion from real to short is performed if necessary.
# It is illegal to reference out of bounds.
procedure imps1r (im, buf, i1, i2, ier)
pointer im # image descriptor
real buf[ARB] # user data buffer
int i1, i2 # first, last column
int ier
pointer bp
long offset
int nchars, npix
int imwpix()
errchk malloc
begin
# Verify in bounds.
if (i1 < 1 || i2 > IM_LEN(im,1) || i1 > i2) {
ier = IE_XOOB
call im_seterrim (ier, im)
return
} else if (IM_PIXTYPE(im) != TY_SHORT && IM_PIXTYPE(im) != TY_REAL) {
ier = IE_PIXTYPE
call im_seterrim (ier, im)
return
}
# Need an extra line buffer for the type conversion in this case.
if (IM_PIXTYPE(im) == TY_SHORT) {
bp = IM_LINEBUFP(im)
if (bp == NULL) {
call malloc (bp, IM_LEN(im,1), TY_SHORT)
IM_LINEBUFP(im) = bp
}
}
npix = (i2 - i1 + 1)
nchars = npix * IM_SZPIXEL(im)
# Compute offset into pixel file.
offset = IM_PIXOFF(im) + (i1-1) * IM_SZPIXEL(im)
if (IM_PIXTYPE(im) == TY_SHORT) {
# Convert the pixels from real to short before writing to the
# pixel file.
call achtrs (buf, Mems[bp], npix)
# Write one line of data.
if (nchars != imwpix (im, Mems[bp], nchars, offset, 1)) {
ier = IE_WRPIX
call im_seterrim (ier, im)
return
}
} else {
# Write one line of data.
if (nchars != imwpix (im, buf, nchars, offset, 0)) {
ier = IE_WRPIX
call im_seterrim (ier, im)
return
}
}
ier = OK
end
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