| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUNTIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . W C H _ J I S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- 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. -- |
| -- 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; |
