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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W C H _ J I S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2005 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, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, 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. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- 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;
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