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+#---------------------------------------------------------------------------
+.help od_parse Feb93 source
+.ih
+NAME
+od_parse -- Parse a section for column names.
+.ih
+USAGE
+call od_parse
+.ih
+ARGUMENTS
+.ih
+DESCRIPTION
+Taken from Bernie Simon's aspare without any modifications.
+.endhelp
+#---------------------------------------------------------------------------
+#* HISTORY *
+#* D.Ball	18-Apr-88	original
+#* B.Simon	06-Aug-92	removed code which deletes commas
+
+# OD_PARSE -- Parse a file name specification into file name and section fields
+#
+#	Syntax:		filename[section]
+#
+# The [ character must be escaped to be included in the filename.
+# This syntax is similar to the image section syntax in imio, but
+# is intended to extract variable names or numbers, column names, etc.
+# for the Astronomical Survival analysis suite of programs.
+# The section field is returned as a string with no leading or trailing 
+# brackets.
+
+procedure od_parse (filespec, file, sz_file, section, sz_section)
+
+char	filespec[ARB]		# i: full file specification
+char	file[sz_file]		# o: receives file name
+int	sz_file			# i: max chars in file name
+char	section[sz_section]	# o: receives section
+int	sz_section		# i: max chars in section name
+#--
+int	ch, ip, op, right
+
+int	strlen()
+
+begin
+	ip = 1
+	op = 1
+
+	# Extract file name.  The first (unescaped) [ marks the start of
+	# the section field.
+
+	for (ch=filespec[ip];  ch != EOS && ch != '[';  ch=filespec[ip]) {
+	    if (ch == '\\' && filespec[ip+1] == '[') {
+		file[op] = '\\'
+		op = op + 1
+		file[op] = '['
+		ip = ip + 1
+	    } else
+		file[op] = ch
+
+	    op = min (sz_file, op + 1)
+	    ip = ip + 1
+	}
+
+	file[op] = EOS
+	section[1]  = EOS
+
+	if (ch == EOS)
+	    return
+
+	# If we have a [...] field, copy the section string,
+	# removing the brackets, and any commas used as delimiters.
+
+	# Eliminate the leading "["
+	ip = ip + 1
+	call strcpy (filespec[ip], section, sz_section)
+
+	# Remove the trailing "]"
+	right = strlen (section)
+	if (section[right] == ']')
+	    section[right] = EOS
+
+end
+#---------------------------------------------------------------------------
+# End of od_parse
+#---------------------------------------------------------------------------