--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/input.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,53 @@
+/* Data and functions related to line maps and input files.
+   Copyright (C) 2004, 2007, 2008, 2009, 2010
+   Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "intl.h"
+#include "input.h"
+
+/* Current position in real source file.  */
+
+location_t input_location;
+
+struct line_maps *line_table;
+
+expanded_location
+expand_location (source_location loc)
+{
+  expanded_location xloc;
+  if (loc <= BUILTINS_LOCATION)
+    {
+      xloc.file = loc == UNKNOWN_LOCATION ? NULL : _("<built-in>");
+      xloc.line = 0;
+      xloc.column = 0;
+      xloc.sysp = 0;
+    }
+  else
+    {
+      const struct line_map *map = linemap_lookup (line_table, loc);
+      xloc.file = map->to_file;
+      xloc.line = SOURCE_LINE (map, loc);
+      xloc.column = SOURCE_COLUMN (map, loc);
+      xloc.sysp = map->sysp != 0;
+    };
+  return xloc;
+}