--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/stringt.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,86 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                              S T R I N G T                               *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *            Copyright (C) 1992-2007, Free Software Foundation, Inc.       *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT 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  distributed with GNAT; see file COPYING3.  If not, go to *
+ * http://www.gnu.org/licenses for a complete copy of the license.          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* This file is the C file that corresponds to the Ada package spec
+   Stringt. It was created manually from stringt.ads and stringt.adb
+
+   Note: only the access functions are provided, since the tree transformer
+   is not allowed to modify the tree or its auxiliary structures.
+
+   This package contains routines for handling the strings table which is
+   used to store string constants encountered in the source, and also those
+   additional string constants generated by compile time concatenation and
+   other similar processing.
+
+   A string constant in this table consists of a series of Char_Code values,
+   so that 16-bit character codes can be properly handled if this feature is
+   implemented in the scanner.
+
+   There is no guarantee that hashing is used in the implementation. This
+   means that the caller cannot count on having the same Id value for two
+   identical strings stored separately.
+
+   The String_Id values reference entries in the Strings table, which
+   contains String_Entry records that record the length of each stored string
+   and its starting location in the String_Chars table.  */
+
+struct String_Entry
+{
+  Int String_Index;
+  Int Length;
+};
+
+/* Pointer to string entry vector. This pointer is passed to the tree
+   transformer and stored in a global location.  */
+extern struct String_Entry *Strings_Ptr;
+
+/* Pointer to name characters table. This pointer is passed to the tree
+   transformer and stored in a global location for access from here. The
+   String_Index values are subscripts into this array.  */
+extern Char_Code *String_Chars_Ptr;
+
+
+/* String_Length returns the length of the specified string.  */
+INLINE Int String_Length (String_Id);
+
+INLINE Int
+String_Length (String_Id Id)
+{
+  return Strings_Ptr[Id - First_String_Id].Length;
+}
+
+
+/* Get_String_Char obtains the specified character from a stored string.  The
+   lower bound of stored strings is always 1, so the range of values is 1 to
+   String_Length (Id).  */
+INLINE Char_Code Get_String_Char (String_Id, Int);
+
+INLINE Char_Code
+Get_String_Char (String_Id Id, Int Index)
+{
+  return
+    String_Chars_Ptr
+      [Strings_Ptr[Id - First_String_Id].String_Index + Index - 1];
+}