Repatch (from linux) of OSX IRAF

1 files changed, 71 insertions, 0 deletions

diff --git a/pkg/xtools/xttxtfio.x b/pkg/xtools/xttxtfio.x
new file mode 100644
index 00000000..88296670
--- /dev/null
+++ b/pkg/xtools/xttxtfio.x
@@ -0,0 +1,71 @@
+define	TXT_MAXFD	64		# Maximum FD for stropen.
+
+
+# XT_TXTOPEN -- Open a READ_ONLY text file which is possibly compiled into a
+# procedure.
+# 
+# This is used to allow text files to be incorported in binaries but still use
+# FIO.  The text file must be compiled into a program which is linked with
+# into the binary (see txtcompile).  A file name of the form proc:nnnn, where
+# nnnn is a number returned by locpr, calls the procedure which is expected to
+# allocate a string buffer.  In this case the string buffer is opened with
+# stropen.  Any other file name is opened as a READ_ONLY TEXT_FILE with
+# normal FIO.
+
+int procedure xt_txtopen (fname)
+
+char	fname[ARB]		#I File name or proc:nnnn reference
+int	fd			#R Null to open and non-null to close
+
+int	ip, procptr, strncmp(), ctoi(), open(), stropen()
+pointer	strbuf
+errchk	zcall1, open, stropen
+
+int	firsttime
+data	firsttime/YES/
+
+pointer	buf[TXT_MAXFD]
+common	/xttxtn_com/ buf
+
+begin
+	# Make sure array of string buffer pointers is initialized.
+	if (firsttime==YES) {
+	    call aclri (buf, TXT_MAXFD)
+	    firsttime = NO
+	}
+
+	# Determine type of open to use.
+	if (strncmp (fname, "proc:", 5) == 0) {
+	    ip = 1
+	    if (ctoi (fname[6], ip, procptr) == 0)
+		call error (1, "xt_txtopen: bad file specification")
+	    call zcall1 (procptr, strbuf)
+	    fd = stropen (Memc[strbuf], ARB, READ_ONLY)
+	    if (fd > TXT_MAXFD) {
+	        call close (fd)
+		call mfree (strbuf, TY_CHAR)
+		call error (1, "xt_txtopen: Too many file descriptors")
+	    }
+	    buf[fd] = strbuf
+	} else
+	    fd = open (fname, READ_ONLY, TEXT_FILE)
+
+	return (fd)
+end
+
+
+# XT_TXTCLOSE -- Close procedure.
+
+procedure xt_txtclose (fd)
+
+int	fd			#O Null to open and non-null to close
+
+pointer	buf[TXT_MAXFD]
+common	/xttxtn_com/ buf
+
+begin
+	# Close file descriptor.
+	call close (fd); fd = NULL
+	if (fd <= TXT_MAXFD)
+	    call mfree (buf[fd], TY_CHAR)
+end