--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/a-stwise.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,125 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--              A D A . S T R I N G S . W I D E _ S E A R C H               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, 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.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains the search functions from Ada.Strings.Wide_Fixed.
+--  They are separated out because they are shared by Ada.Strings.Wide_Bounded
+--  and Ada.Strings.Wide_Unbounded, and we don't want to drag in other
+--  irrelevant stuff from Ada.Strings.Wide_Fixed when using the other two
+--  packages. We make this a private package, since user programs should
+--  access these subprograms via one of the standard string packages.
+
+with Ada.Strings.Wide_Maps;
+
+private package Ada.Strings.Wide_Search is
+   pragma Preelaborate;
+
+   function Index
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      Going   : Direction := Forward;
+      Mapping : Wide_Maps.Wide_Character_Mapping :=
+                  Wide_Maps.Identity) return Natural;
+
+   function Index
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      Going   : Direction := Forward;
+      Mapping : Wide_Maps.Wide_Character_Mapping_Function) return Natural;
+
+   function Index
+     (Source : Wide_String;
+      Set    : Wide_Maps.Wide_Character_Set;
+      Test   : Membership := Inside;
+      Going  : Direction  := Forward) return Natural;
+
+   function Index
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      From    : Positive;
+      Going   : Direction := Forward;
+      Mapping : Wide_Maps.Wide_Character_Mapping := Wide_Maps.Identity)
+      return Natural;
+
+   function Index
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      From    : Positive;
+      Going   : Direction := Forward;
+      Mapping : Wide_Maps.Wide_Character_Mapping_Function) return Natural;
+
+   function Index
+     (Source  : Wide_String;
+      Set     : Wide_Maps.Wide_Character_Set;
+      From    : Positive;
+      Test    : Membership := Inside;
+      Going   : Direction := Forward) return Natural;
+
+   function Index_Non_Blank
+     (Source : Wide_String;
+      Going  : Direction := Forward) return Natural;
+
+   function Index_Non_Blank
+     (Source : Wide_String;
+      From   : Positive;
+      Going  : Direction := Forward) return Natural;
+
+   function Count
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      Mapping : Wide_Maps.Wide_Character_Mapping := Wide_Maps.Identity)
+      return Natural;
+
+   function Count
+     (Source  : Wide_String;
+      Pattern : Wide_String;
+      Mapping : Wide_Maps.Wide_Character_Mapping_Function) return Natural;
+
+   function Count
+     (Source : Wide_String;
+      Set    : Wide_Maps.Wide_Character_Set) return Natural;
+
+   procedure Find_Token
+     (Source : Wide_String;
+      Set    : Wide_Maps.Wide_Character_Set;
+      From   : Positive;
+      Test   : Membership;
+      First  : out Positive;
+      Last   : out Natural);
+   pragma Ada_2012 (Find_Token);
+
+   procedure Find_Token
+     (Source : Wide_String;
+      Set    : Wide_Maps.Wide_Character_Set;
+      Test   : Membership;
+      First  : out Positive;
+      Last   : out Natural);
+
+end Ada.Strings.Wide_Search;