| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . W C H _ J I S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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 contains routines used for converting between internal |
| -- JIS codes and the two external forms we support (EUC and Shift-JIS) |
| |
| pragma Compiler_Unit_Warning; |
| |
| package System.WCh_JIS is |
| pragma Pure; |
| |
| 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 : 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 : 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; |
