--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-diflio.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,184 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                    S Y S T E M . D I M . F L O A T _ I O                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2011-2017, 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 output routines for float dimensioned types. All Put
+--  routines are modeled after those in package Ada.Text_IO.Float_IO with the
+--  addition of an extra default parameter. All Put_Dim_Of routines
+--  output the dimension of Item in a symbolic manner.
+
+--  Parameter Symbol may be used in the following manner (all the examples are
+--  based on the MKS system of units defined in package System.Dim.Mks):
+
+--    type Mks_Type is new Long_Long_Float
+--      with
+--       Dimension_System => (
+--        (Unit_Name => Meter,    Unit_Symbol => 'm',   Dim_Symbol => 'L'),
+--        (Unit_Name => Kilogram, Unit_Symbol => "kg",  Dim_Symbol => 'M'),
+--        (Unit_Name => Second,   Unit_Symbol => 's',   Dim_Symbol => 'T'),
+--        (Unit_Name => Ampere,   Unit_Symbol => 'A',   Dim_Symbol => 'I'),
+--        (Unit_Name => Kelvin,   Unit_Symbol => 'K',   Dim_Symbol => '@'),
+--        (Unit_Name => Mole,     Unit_Symbol => "mol", Dim_Symbol => 'N'),
+--        (Unit_Name => Candela,  Unit_Symbol => "cd",  Dim_Symbol => 'J'));
+
+--  Case 1. A value is supplied for Symbol
+
+--   * Put        : The string appears as a suffix of Item
+
+--   * Put_Dim_Of : The string appears alone
+
+--      Obj : Mks_Type := 2.6;
+--      Put (Obj, 1, 1, 0, " dimensionless");
+--      Put_Dim_Of (Obj, "dimensionless");
+
+--      The corresponding outputs are:
+--      $2.6 dimensionless
+--      $dimensionless
+
+--  Case 2. No value is supplied for Symbol and Item is dimensionless
+
+--   * Put        : Item appears without a suffix
+
+--   * Put_Dim_Of : the output is []
+
+--      Obj : Mks_Type := 2.6;
+--      Put (Obj, 1, 1, 0);
+--      Put_Dim_Of (Obj);
+
+--      The corresponding outputs are:
+--      $2.6
+--      $[]
+
+--  Case 3. No value is supplied for Symbol and Item has a dimension
+
+--   * Put        : If the type of Item is a dimensioned subtype whose
+--                  symbol is not empty, then the symbol appears as a suffix.
+--                  Otherwise, a new string is created and appears as a
+--                  suffix of Item. This string results in the successive
+--                  concatenations between each unit symbol raised by its
+--                  corresponding dimension power from the dimensions of Item.
+
+--   * Put_Dim_Of : The output is a new string resulting in the successive
+--                  concatenations between each dimension symbol raised by its
+--                  corresponding dimension power from the dimensions of Item.
+
+--      subtype Length is Mks_Type
+--        with
+--         Dimension => ('m',
+--           Meter =>  1,
+--           others => 0);
+
+--      Obj : Length := 2.3 * dm;
+--      Put (Obj, 1, 2, 0);
+--      Put_Dim_Of (Obj);
+
+--      The corresponding outputs are:
+--      $0.23 m
+--      $[L]
+
+--      subtype Random is Mks_Type
+--        with
+--         Dimension => (
+--           Meter =>   3,
+--           Candela => -1,
+--           others =>  0);
+
+--      Obj : Random := 5.0;
+--      Put (Obj);
+--      Put_Dim_Of (Obj);
+
+--      The corresponding outputs are:
+--      $5.0 m**3.cd**(-1)
+--      $[l**3.J**(-1)]
+
+--      Put (3.3 * km * dm * min, 5, 1, 0);
+--      Put_Dim_Of (3.3 * km * dm * min);
+
+--      The corresponding outputs are:
+--      $19800.0 m**2.s
+--      $[L**2.T]
+
+with Ada.Text_IO; use Ada.Text_IO;
+
+generic
+   type Num_Dim_Float is digits <>;
+
+package System.Dim.Float_IO is
+
+   Default_Fore : Field := 2;
+   Default_Aft  : Field := Num_Dim_Float'Digits - 1;
+   Default_Exp  : Field := 3;
+
+   procedure Put
+     (File   : File_Type;
+      Item   : Num_Dim_Float;
+      Fore   : Field  := Default_Fore;
+      Aft    : Field  := Default_Aft;
+      Exp    : Field  := Default_Exp;
+      Symbol : String := "");
+
+   procedure Put
+     (Item   : Num_Dim_Float;
+      Fore   : Field  := Default_Fore;
+      Aft    : Field  := Default_Aft;
+      Exp    : Field  := Default_Exp;
+      Symbol : String := "");
+
+   procedure Put
+     (To     : out String;
+      Item   : Num_Dim_Float;
+      Aft    : Field  := Default_Aft;
+      Exp    : Field  := Default_Exp;
+      Symbol : String := "");
+
+   procedure Put_Dim_Of
+     (File   : File_Type;
+      Item   : Num_Dim_Float;
+      Symbol : String := "");
+
+   procedure Put_Dim_Of
+     (Item   : Num_Dim_Float;
+      Symbol : String := "");
+
+   procedure Put_Dim_Of
+     (To     : out String;
+      Item   : Num_Dim_Float;
+      Symbol : String := "");
+
+   pragma Inline (Put);
+   pragma Inline (Put_Dim_Of);
+
+   function Image
+     (Item : Num_Dim_Float;
+      Aft    : Field  := Default_Aft;
+      Exp    : Field  := Default_Exp;
+      Symbol : String := "") return String;
+
+end System.Dim.Float_IO;