1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . W C H _ J I S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2013, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package contains routines used for converting between internal 33-- JIS codes and the two external forms we support (EUC and Shift-JIS) 34 35pragma Compiler_Unit_Warning; 36 37package System.WCh_JIS is 38 pragma Pure; 39 40 function EUC_To_JIS (EUC1, EUC2 : Character) return Wide_Character; 41 -- Given the two bytes of a EUC representation, return the 42 -- corresponding JIS code wide character. Raises Constraint_Error 43 -- if the two characters are not a valid EUC encoding. 44 45 procedure JIS_To_EUC 46 (J : Wide_Character; 47 EUC1 : out Character; 48 EUC2 : out Character); 49 50 -- Given a wide character in JIS form, produce the corresponding 51 -- two bytes of the EUC representation of this character. This is 52 -- only used if J is not in the normal ASCII range, i.e. on entry 53 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we 54 -- thus require a two byte EUC representation (ASCII codes appear 55 -- unchanged as a single byte in EUC). No error checking is performed, 56 -- the input code is assumed to be in an appropriate range. 57 58 procedure JIS_To_Shift_JIS 59 (J : Wide_Character; 60 SJ1 : out Character; 61 SJ2 : out Character); 62 -- Given a wide character code in JIS form, produce the corresponding 63 -- two bytes of the Shift-JIS representation of this character. This 64 -- is only used if J is not in the normal ASCII range, i.e. on entry 65 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we 66 -- thus require a two byte EUC representation (ASCII codes appear 67 -- unchanged as a single byte in EUC). No error checking is performed, 68 -- the input code is assumed to be in an appropriate range (note in 69 -- particular that input codes in the range 16#0080#-16#00FF#, i.e. 70 -- Hankaku Kana, do not appear, since Shift JIS has no representation 71 -- for such codes. 72 73 function Shift_JIS_To_JIS (SJ1, SJ2 : Character) return Wide_Character; 74 -- Given the two bytes of a Shift-JIS representation, return the 75 -- corresponding JIS code wide character. Raises Constraint_Error if 76 -- the two characters are not a valid shift-JIS encoding. 77 78end System.WCh_JIS; 79