From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 pkg/proto/t_hfix.x | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 pkg/proto/t_hfix.x

(limited to 'pkg/proto/t_hfix.x')

diff --git a/pkg/proto/t_hfix.x b/pkg/proto/t_hfix.x
new file mode 100644
index 00000000..fb75b2e2
--- /dev/null
+++ b/pkg/proto/t_hfix.x
@@ -0,0 +1,140 @@
+include	<error.h>
+include	<imio.h>
+include	<imhdr.h>
+include	<ctype.h>
+
+define	IS_FITS		(IS_DIGIT($1)||IS_UPPER($1)||($1=='-')||($1=='_'))
+
+# T_HFIX -- Fix image headers
+#
+# Fix image headers using a user supplied command.
+# This task is a prototype which directly accesses the user header block
+# and uses CLCMDW.
+
+procedure t_hfix ()
+
+int	images			# List of images to be fixed
+pointer	cmd			# Fix command
+bool	update			# Update image header
+
+int	mode, reclen
+pointer	sp, image, efile, ecmd, eline
+pointer	im, ua, fd, hd, ip, jp, kp
+
+int	imtopenp(), imtgetim(), stridxs(), open(), stropen()
+int	getline(), gstrcpy()
+bool	clgetb()
+pointer	immap()
+errchk	open, clcmdw
+
+begin
+	call smark (sp)
+	call salloc (image, SZ_FNAME, TY_CHAR)
+	call salloc (cmd,SZ_LINE, TY_CHAR)
+	call salloc (efile, SZ_FNAME, TY_CHAR)
+	call salloc (ecmd, SZ_LINE, TY_CHAR)
+	call salloc (eline, SZ_LINE, TY_CHAR)
+
+	# Get task parameters and set update mode
+	images = imtopenp ("images")
+	call clgstr ("command", Memc[cmd], SZ_LINE)
+	update = clgetb ("update")
+	if (update)
+	    mode = READ_WRITE
+	else
+	    mode = READ_ONLY
+
+	# Fix the image headers.
+	while (imtgetim (images, Memc[image], SZ_FNAME) != EOF) {
+	    iferr (im = immap (Memc[image], mode, NULL)) {
+		call erract (EA_WARN)
+		next
+	    }
+
+	    # Determine header blocking
+	    ua = IM_USERAREA(im)
+	    reclen = stridxs ("\n", Memc[ua]) - 1
+	    if (IM_UABLOCKED(im) < 0) {
+		if (reclen == 80)
+		    IM_UABLOCKED(im) = YES
+		else
+		    IM_UABLOCKED(im) = NO
+	    }
+
+	    # Create a temporary file and copy the user area into it
+	    call mktemp ("tmp", Memc[efile], SZ_FNAME)
+	    fd = open (Memc[efile], NEW_FILE, TEXT_FILE)
+	    hd = stropen (Memc[ua], ARB, READ_ONLY)
+	    call fcopyo (hd, fd)
+	    call close (fd)
+	    call close (hd)
+
+	    # Expand the user command
+	    jp = ecmd
+	    for (ip=cmd; Memc[ip]!=EOS; ip=ip+1) {
+		if (Memc[ip] == '$') {
+		    if (Memc[ip+1] == 'i') {
+			for (kp=image; Memc[kp]!=EOS; kp=kp+1) {
+			    Memc[jp] = Memc[kp]
+			    jp = jp + 1
+			}
+			ip = ip + 5
+		    } else {
+			for (kp=efile; Memc[kp]!=EOS; kp=kp+1) {
+			    Memc[jp] = Memc[kp]
+			    jp = jp + 1
+			}
+			ip = ip + 5
+		    }
+		} else {
+		    Memc[jp] = Memc[ip]
+		    jp = jp + 1
+		}
+	    }
+	    Memc[jp] = EOS
+
+	    iferr {
+		# Fix the header with the user command
+		call clcmdw (Memc[ecmd])
+
+		if (update) {
+		    # Copy the fixed header back into the user area, reblocking
+		    # where necessary.  Skip non-FITS lines.
+
+		    kp = ua
+		    fd = open (Memc[efile], READ_ONLY, TEXT_FILE)
+		    while (getline (fd, Memc[eline]) != EOF) {
+			for (ip=eline; IS_WHITE(Memc[ip]); ip=ip+1)
+			    ;
+			for (jp=ip; IS_FITS(Memc[jp]); jp=jp+1)
+			    ;
+			for (; jp<ip+8 && Memc[jp]==' '; jp=jp+1)
+			    ;
+			if (jp<ip+8 && Memc[jp] != EOS && Memc[jp] != '\n')
+			    next
+			if (Memc[jp] == '=' && Memc[jp+1] != ' ')
+			    next
+			for (; jp<ip+80 && Memc[jp]!=EOS && Memc[jp]!='\n';
+			    jp=jp+1)
+			    ;
+			if (IM_UABLOCKED(im) == YES)
+			    for (; jp<ip+reclen; jp=jp+1)
+				Memc[jp] = ' '
+			Memc[jp] = '\n'
+			Memc[jp+1] = EOS
+			kp = kp + gstrcpy(Memc[ip], Memc[kp], SZ_LINE)
+		    }
+		    Memc[kp] = EOS
+
+		    call close (fd)
+		}
+		call delete (Memc[efile])
+	    } then
+		call erract (EA_WARN)
+
+	    call imunmap (im)
+	}
+
+	call imtclose (images)
+	call sfree (sp)
+end
-- 
cgit