1 files changed, 84 insertions, 0 deletions
diff --git a/sys/imfort/imps2r.x b/sys/imfort/imps2r.x
new file mode 100644
index 00000000..8306e701
--- /dev/null
+++ b/sys/imfort/imps2r.x
@@ -0,0 +1,84 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<imhdr.h>
+include	"imfort.h"
+
+# IMPS2R -- 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 imps2r (im, buf, i1, i2, j1, j2, ier)
+
+pointer	im			# image descriptor
+real	buf[ARB]		# user data buffer
+int	i1, i2			# first, last column
+int	j1, j2			# line number
+int	ier
+
+pointer	bp
+long	offset
+int	nchars, npix, ip, j
+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 (j1 < 1 || j2 > IM_LEN(im,2) || j1 > j2) {
+	    ier = IE_YOOB
+	    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)
+	ip = 1
+
+	do j = j1, j2 {
+	    # Compute offset into pixel file.
+	    offset = IM_PIXOFF(im) + (j-1) * IM_LINESIZE(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[ip], 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[ip], nchars, offset, 0)) {
+		    ier = IE_WRPIX
+		    call im_seterrim (ier, im)
+		    return
+		}
+	    }
+
+	    ip = ip + npix
+	}
+
+	ier = OK
+end