--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-ststop.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,260 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--              S Y S T E M . S T R I N G S . S T R E A M _ O P S           --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2009-2017, 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 provides subprogram implementations of stream attributes for
+--  the following types using a "block IO" approach in which the entire data
+--  item is written in one operation, instead of writing individual characters.
+
+--     Ada.Stream_Element_Array
+--     Ada.String
+--     Ada.Wide_String
+--     Ada.Wide_Wide_String
+--     System.Storage_Array
+
+--  Note: this routine is in Ada.Strings because historically it handled only
+--  the string types. It is not worth moving it at this stage.
+
+--  The compiler will generate references to the subprograms in this package
+--  when expanding stream attributes for the above mentioned types. Example:
+
+--     String'Output (Some_Stream, Some_String);
+
+--  will be expanded into:
+
+--     String_Output (Some_Stream, Some_String);
+--       or
+--     String_Output_Blk_IO (Some_Stream, Some_String);
+
+--  String_Output form is used if pragma Restrictions (No_String_Optimziations)
+--  is active, which requires element by element operations. The BLK_IO form
+--  is used if this restriction is not set, allowing block optimization.
+
+--  Note that if System.Stream_Attributes.Block_IO_OK is False, then the BLK_IO
+--  form is treated as equivalent to the normal case, so that the optimization
+--  is inhibited anyway, regardless of the setting of the restriction. This
+--  handles versions of System.Stream_Attributes (in particular the XDR version
+--  found in s-stratt-xdr) which do not permit block io optimization.
+
+pragma Compiler_Unit_Warning;
+
+with Ada.Streams;
+
+with System.Storage_Elements;
+
+package System.Strings.Stream_Ops is
+
+   -------------------------------------
+   -- Storage_Array stream operations --
+   -------------------------------------
+
+   function Storage_Array_Input
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return System.Storage_Elements.Storage_Array;
+
+   function Storage_Array_Input_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return System.Storage_Elements.Storage_Array;
+
+   procedure Storage_Array_Output
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : System.Storage_Elements.Storage_Array);
+
+   procedure Storage_Array_Output_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : System.Storage_Elements.Storage_Array);
+
+   procedure Storage_Array_Read
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out System.Storage_Elements.Storage_Array);
+
+   procedure Storage_Array_Read_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out System.Storage_Elements.Storage_Array);
+
+   procedure Storage_Array_Write
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : System.Storage_Elements.Storage_Array);
+
+   procedure Storage_Array_Write_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : System.Storage_Elements.Storage_Array);
+
+   --------------------------------------------
+   -- Stream_Element_Array stream operations --
+   --------------------------------------------
+
+   function Stream_Element_Array_Input
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Ada.Streams.Stream_Element_Array;
+
+   function Stream_Element_Array_Input_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Ada.Streams.Stream_Element_Array;
+
+   procedure Stream_Element_Array_Output
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Ada.Streams.Stream_Element_Array);
+
+   procedure Stream_Element_Array_Output_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Ada.Streams.Stream_Element_Array);
+
+   procedure Stream_Element_Array_Read
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Ada.Streams.Stream_Element_Array);
+
+   procedure Stream_Element_Array_Read_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Ada.Streams.Stream_Element_Array);
+
+   procedure Stream_Element_Array_Write
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Ada.Streams.Stream_Element_Array);
+
+   procedure Stream_Element_Array_Write_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Ada.Streams.Stream_Element_Array);
+
+   ------------------------------
+   -- String stream operations --
+   ------------------------------
+
+   function String_Input
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return String;
+
+   function String_Input_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return String;
+
+   function String_Input_Tag
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return String;
+   --  Same as String_Input_Blk_IO, except raises an exception for overly long
+   --  Strings. See expansion of Attribute_Input in Exp_Attr for details.
+
+   procedure String_Output
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : String);
+
+   procedure String_Output_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : String);
+
+   procedure String_Read
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out String);
+
+   procedure String_Read_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out String);
+
+   procedure String_Write
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : String);
+
+   procedure String_Write_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : String);
+
+   -----------------------------------
+   -- Wide_String stream operations --
+   -----------------------------------
+
+   function Wide_String_Input
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Wide_String;
+
+   function Wide_String_Input_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Wide_String;
+
+   procedure Wide_String_Output
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_String);
+
+   procedure Wide_String_Output_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_String);
+
+   procedure Wide_String_Read
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Wide_String);
+
+   procedure Wide_String_Read_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Wide_String);
+
+   procedure Wide_String_Write
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_String);
+
+   procedure Wide_String_Write_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_String);
+
+   ----------------------------------------
+   -- Wide_Wide_String stream operations --
+   ----------------------------------------
+
+   function Wide_Wide_String_Input
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Wide_Wide_String;
+
+   function Wide_Wide_String_Input_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class)
+      return Wide_Wide_String;
+
+   procedure Wide_Wide_String_Output
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_Wide_String);
+
+   procedure Wide_Wide_String_Output_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_Wide_String);
+
+   procedure Wide_Wide_String_Read
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Wide_Wide_String);
+
+   procedure Wide_Wide_String_Read_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : out Wide_Wide_String);
+
+   procedure Wide_Wide_String_Write
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_Wide_String);
+
+   procedure Wide_Wide_String_Write_Blk_IO
+     (Strm : access Ada.Streams.Root_Stream_Type'Class;
+      Item : Wide_Wide_String);
+
+end System.Strings.Stream_Ops;