New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45957 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUNTIME COMPONENTS                          --
+--                                                                          --
+--                       S Y S T E M . W C H _ J I S                        --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.5 $                              --
+--                                                                          --
+--        Copyright (C) 1992,1993,1994 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 2,  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 COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains routines used for converting between internal
+--  JIS codes and the two external forms we support (EUC and Shift-JIS)
+
+package System.WCh_JIS is
+pragma Pure (WCh_JIS);
+
+   function EUC_To_JIS (EUC1, EUC2 : Character) return Wide_Character;
+   --  Given the two bytes of a EUC representation, return the
+   --  corresponding JIS code wide character. Raises Constraint_Error
+   --  if the two characters are not a valid EUC encoding.
+
+   procedure JIS_To_EUC
+     (J    : in Wide_Character;
+      EUC1 : out Character;
+      EUC2 : out Character);
+
+   --  Given a wide character in JIS form, produce the corresponding
+   --  two bytes of the EUC representation of this character. This is
+   --  only used if J is not in the normal ASCII range, i.e. on entry
+   --  we know that Wide_Character'Pos (J) >= 16#0080# and that we
+   --  thus require a two byte EUC representation (ASCII codes appear
+   --  unchanged as a single byte in EUC). No error checking is performed,
+   --  the input code is assumed to be in an appropriate range.
+
+   procedure JIS_To_Shift_JIS
+     (J   : in Wide_Character;
+      SJ1 : out Character;
+      SJ2 : out Character);
+   --  Given a wide character code in JIS form, produce the corresponding
+   --  two bytes of the Shift-JIS representation of this character. This
+   --  is only used if J is not in the normal ASCII range, i.e. on entry
+   --  we know that Wide_Character'Pos (J) >= 16#0080# and that we
+   --  thus require a two byte EUC representation (ASCII codes appear
+   --  unchanged as a single byte in EUC). No error checking is performed,
+   --  the input code is assumed to be in an appropriate range (note in
+   --  particular that input codes in the range 16#0080#-16#00FF#, i.e.
+   --  Hankaku Kana, do not appear, since Shift JIS has no representation
+   --  for such codes.
+
+   function Shift_JIS_To_JIS (SJ1, SJ2 : Character) return Wide_Character;
+   --  Given the two bytes of a Shift-JIS representation, return the
+   --  corresponding JIS code wide character. Raises Constraint_Error if
+   --  the two characters are not a valid shift-JIS encoding.
+
+end System.WCh_JIS;