1 files changed, 58 insertions, 0 deletions
diff --git a/sys/imfort/imps2s.x b/sys/imfort/imps2s.x
new file mode 100644
index 00000000..81ee8baa
--- /dev/null
+++ b/sys/imfort/imps2s.x
@@ -0,0 +1,58 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<imhdr.h>
+include	"imfort.h"
+
+# IMPS2S -- Put a section to a 2 dimensional image of type short.
+# No automatic datatype conversion is performed.  It is illegal to reference
+# out of bounds.
+
+procedure imps2s (im, buf, i1, i2, j1, j2, ier)
+
+pointer	im			# image descriptor
+short	buf[ARB]		# user data buffer
+int	i1, i2			# first, last columns
+int	j1, j2			# first, last lines
+int	ier
+
+long	offset
+int	nchars, npix, ip, j
+int	imwpix()
+
+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) {
+	    ier = IE_NOTSHORT
+	    call im_seterrim (ier, im)
+	    return
+	}
+
+	npix = i2 - i1 + 1
+	nchars = npix * SZ_SHORT
+	ip = 1
+
+	do j = j1, j2 {
+	    # Compute offset into pixel file.
+	    offset = IM_PIXOFF(im) +
+		((j-1) * IM_LINESIZE(im) + (i1-1)) * SZ_SHORT
+
+	    # 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