--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-sercom__mingw.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,316 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--           G N A T . S E R I A L _ C O M M U N I C A T I O N S            --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                    Copyright (C) 2007-2017, AdaCore                      --
+--                                                                          --
+-- 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 is the Windows implementation of this package
+
+with Ada.Streams;                use Ada.Streams;
+with Ada.Unchecked_Deallocation; use Ada;
+
+with System;               use System;
+with System.Communication; use System.Communication;
+with System.CRTL;          use System.CRTL;
+with System.OS_Constants;
+with System.Win32;         use System.Win32;
+with System.Win32.Ext;     use System.Win32.Ext;
+
+with GNAT.OS_Lib;
+
+package body GNAT.Serial_Communications is
+
+   package OSC renames System.OS_Constants;
+
+   --  Common types
+
+   type Port_Data is new HANDLE;
+
+   C_Bits      : constant array (Data_Bits) of Interfaces.C.unsigned := (8, 7);
+   C_Parity    : constant array (Parity_Check) of Interfaces.C.unsigned :=
+                   (None => NOPARITY, Odd => ODDPARITY, Even => EVENPARITY);
+   C_Stop_Bits : constant array (Stop_Bits_Number) of Interfaces.C.unsigned :=
+                   (One => ONESTOPBIT, Two => TWOSTOPBITS);
+
+   -----------
+   -- Files --
+   -----------
+
+   procedure Raise_Error (Message : String; Error : DWORD := GetLastError);
+   pragma No_Return (Raise_Error);
+
+   -----------
+   -- Close --
+   -----------
+
+   procedure Close (Port : in out Serial_Port) is
+      procedure Unchecked_Free is
+        new Unchecked_Deallocation (Port_Data, Port_Data_Access);
+
+      Success : BOOL;
+
+   begin
+      if Port.H /= null then
+         Success := CloseHandle (HANDLE (Port.H.all));
+         Unchecked_Free (Port.H);
+
+         if Success = Win32.FALSE then
+            Raise_Error ("error closing the port");
+         end if;
+      end if;
+   end Close;
+
+   ----------
+   -- Name --
+   ----------
+
+   function Name (Number : Positive) return Port_Name is
+      N_Img : constant String := Positive'Image (Number);
+   begin
+      if Number > 9 then
+         return
+           Port_Name ("\\.\COM" & N_Img (N_Img'First + 1 .. N_Img'Last));
+      else
+         return
+           Port_Name ("COM" & N_Img (N_Img'First + 1 .. N_Img'Last) & ':');
+      end if;
+   end Name;
+
+   ----------
+   -- Open --
+   ----------
+
+   procedure Open
+     (Port : out Serial_Port;
+      Name : Port_Name)
+   is
+      C_Name  : constant String := String (Name) & ASCII.NUL;
+      Success : BOOL;
+      pragma Unreferenced (Success);
+
+   begin
+      if Port.H = null then
+         Port.H := new Port_Data;
+      else
+         Success := CloseHandle (HANDLE (Port.H.all));
+      end if;
+
+      Port.H.all := CreateFileA
+        (lpFileName            => C_Name (C_Name'First)'Address,
+         dwDesiredAccess       => GENERIC_READ or GENERIC_WRITE,
+         dwShareMode           => 0,
+         lpSecurityAttributes  => null,
+         dwCreationDisposition => OPEN_EXISTING,
+         dwFlagsAndAttributes  => 0,
+         hTemplateFile         => 0);
+
+      if Port.H.all = Port_Data (INVALID_HANDLE_VALUE) then
+         Raise_Error ("cannot open com port");
+      end if;
+   end Open;
+
+   -----------------
+   -- Raise_Error --
+   -----------------
+
+   procedure Raise_Error (Message : String; Error : DWORD := GetLastError) is
+   begin
+      raise Serial_Error with Message
+        & (if Error /= 0
+           then " (" & GNAT.OS_Lib.Errno_Message (Err => Integer (Error)) & ')'
+           else "");
+   end Raise_Error;
+
+   ----------
+   -- Read --
+   ----------
+
+   overriding procedure Read
+     (Port   : in out Serial_Port;
+      Buffer : out Stream_Element_Array;
+      Last   : out Stream_Element_Offset)
+   is
+      Success   : BOOL;
+      Read_Last : aliased DWORD;
+
+   begin
+      if Port.H = null then
+         Raise_Error ("read: port not opened", 0);
+      end if;
+
+      Success :=
+        ReadFile
+          (hFile                => HANDLE (Port.H.all),
+           lpBuffer             => Buffer (Buffer'First)'Address,
+           nNumberOfBytesToRead => DWORD (Buffer'Length),
+           lpNumberOfBytesRead  => Read_Last'Access,
+           lpOverlapped         => null);
+
+      if Success = Win32.FALSE then
+         Raise_Error ("read error");
+      end if;
+
+      Last := Last_Index (Buffer'First, size_t (Read_Last));
+   end Read;
+
+   ---------
+   -- Set --
+   ---------
+
+   procedure Set
+     (Port      : Serial_Port;
+      Rate      : Data_Rate        := B9600;
+      Bits      : Data_Bits        := CS8;
+      Stop_Bits : Stop_Bits_Number := One;
+      Parity    : Parity_Check     := None;
+      Block     : Boolean          := True;
+      Local     : Boolean          := True;
+      Flow      : Flow_Control     := None;
+      Timeout   : Duration         := 10.0)
+   is
+      pragma Unreferenced (Local);
+
+      Success      : BOOL;
+      Com_Time_Out : aliased COMMTIMEOUTS;
+      Com_Settings : aliased DCB;
+
+   begin
+      if Port.H = null then
+         Raise_Error ("set: port not opened", 0);
+      end if;
+
+      Success := GetCommState (HANDLE (Port.H.all), Com_Settings'Access);
+
+      if Success = Win32.FALSE then
+         Success := CloseHandle (HANDLE (Port.H.all));
+         Port.H.all := 0;
+         Raise_Error ("set: cannot get comm state");
+      end if;
+
+      Com_Settings.BaudRate        := DWORD (Data_Rate_Value (Rate));
+      Com_Settings.fParity         := 1;
+      Com_Settings.fBinary         := Bits1 (System.Win32.TRUE);
+      Com_Settings.fOutxDsrFlow    := 0;
+      Com_Settings.fDsrSensitivity := 0;
+      Com_Settings.fDtrControl     := OSC.DTR_CONTROL_ENABLE;
+      Com_Settings.fInX            := 0;
+      Com_Settings.fRtsControl     := OSC.RTS_CONTROL_ENABLE;
+
+      case Flow is
+         when None =>
+            Com_Settings.fOutX        := 0;
+            Com_Settings.fOutxCtsFlow := 0;
+
+         when RTS_CTS =>
+            Com_Settings.fOutX        := 0;
+            Com_Settings.fOutxCtsFlow := 1;
+
+         when Xon_Xoff =>
+            Com_Settings.fOutX        := 1;
+            Com_Settings.fOutxCtsFlow := 0;
+      end case;
+
+      Com_Settings.fAbortOnError := 0;
+      Com_Settings.ByteSize      := BYTE (C_Bits (Bits));
+      Com_Settings.Parity        := BYTE (C_Parity (Parity));
+      Com_Settings.StopBits      := BYTE (C_Stop_Bits (Stop_Bits));
+
+      Success := SetCommState (HANDLE (Port.H.all), Com_Settings'Access);
+
+      if Success = Win32.FALSE then
+         Success := CloseHandle (HANDLE (Port.H.all));
+         Port.H.all := 0;
+         Raise_Error ("cannot set comm state");
+      end if;
+
+      --  Set the timeout status, to honor our spec with respect to read
+      --  timeouts. Always disconnect write timeouts.
+
+      --  Blocking reads - no timeout at all
+
+      if Block then
+         Com_Time_Out := (others => 0);
+
+      --  Non-blocking reads and null timeout - immediate return with what we
+      --  have - set ReadIntervalTimeout to MAXDWORD.
+
+      elsif Timeout = 0.0 then
+         Com_Time_Out :=
+           (ReadIntervalTimeout => DWORD'Last,
+            others              => 0);
+
+      --  Non-blocking reads with timeout - set total read timeout accordingly
+
+      else
+         Com_Time_Out :=
+           (ReadTotalTimeoutConstant => DWORD (1000 * Timeout),
+            others                   => 0);
+      end if;
+
+      Success :=
+        SetCommTimeouts
+          (hFile          => HANDLE (Port.H.all),
+           lpCommTimeouts => Com_Time_Out'Access);
+
+      if Success = Win32.FALSE then
+         Raise_Error ("cannot set the timeout");
+      end if;
+   end Set;
+
+   -----------
+   -- Write --
+   -----------
+
+   overriding procedure Write
+     (Port   : in out Serial_Port;
+      Buffer : Stream_Element_Array)
+   is
+      Success   : BOOL;
+      Temp_Last : aliased DWORD;
+
+   begin
+      if Port.H = null then
+         Raise_Error ("write: port not opened", 0);
+      end if;
+
+      Success :=
+        WriteFile
+          (hFile                  => HANDLE (Port.H.all),
+           lpBuffer               => Buffer'Address,
+           nNumberOfBytesToWrite  => DWORD (Buffer'Length),
+           lpNumberOfBytesWritten => Temp_Last'Access,
+           lpOverlapped           => null);
+
+      if Success = Win32.FALSE
+        or else Stream_Element_Offset (Temp_Last) /= Buffer'Length
+      then
+         Raise_Error ("failed to write data");
+      end if;
+   end Write;
+
+end GNAT.Serial_Communications;