79 lines
4.4 KiB
Ada
79 lines
4.4 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . W C H _ J I S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package contains routines used for converting between internal
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-- JIS codes and the two external forms we support (EUC and Shift-JIS)
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pragma Compiler_Unit_Warning;
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package System.WCh_JIS is
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pragma Pure;
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function EUC_To_JIS (EUC1, EUC2 : Character) return Wide_Character;
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-- Given the two bytes of a EUC representation, return the
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-- corresponding JIS code wide character. Raises Constraint_Error
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-- if the two characters are not a valid EUC encoding.
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procedure JIS_To_EUC
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(J : Wide_Character;
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EUC1 : out Character;
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EUC2 : out Character);
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-- Given a wide character in JIS form, produce the corresponding
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-- two bytes of the EUC representation of this character. This is
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-- only used if J is not in the normal ASCII range, i.e. on entry
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-- we know that Wide_Character'Pos (J) >= 16#0080# and that we
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-- thus require a two byte EUC representation (ASCII codes appear
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-- unchanged as a single byte in EUC). No error checking is performed,
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-- the input code is assumed to be in an appropriate range.
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procedure JIS_To_Shift_JIS
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(J : Wide_Character;
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SJ1 : out Character;
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SJ2 : out Character);
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-- Given a wide character code in JIS form, produce the corresponding
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-- two bytes of the Shift-JIS representation of this character. This
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-- is only used if J is not in the normal ASCII range, i.e. on entry
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-- we know that Wide_Character'Pos (J) >= 16#0080# and that we
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-- thus require a two byte EUC representation (ASCII codes appear
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-- unchanged as a single byte in EUC). No error checking is performed,
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-- the input code is assumed to be in an appropriate range (note in
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-- particular that input codes in the range 16#0080#-16#00FF#, i.e.
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-- Hankaku Kana, do not appear, since Shift JIS has no representation
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-- for such codes.
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function Shift_JIS_To_JIS (SJ1, SJ2 : Character) return Wide_Character;
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-- Given the two bytes of a Shift-JIS representation, return the
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-- corresponding JIS code wide character. Raises Constraint_Error if
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-- the two characters are not a valid shift-JIS encoding.
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end System.WCh_JIS;
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