98 lines
3.0 KiB
C#
98 lines
3.0 KiB
C#
/*
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* JISConvert.cs - Implementation of the "System.Text.JISConvert" class.
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*
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* Copyright (c) 2002 Southern Storm Software, Pty Ltd
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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namespace I18N.CJK
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{
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using System;
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// This class assists other encoding classes in converting back
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// and forth between JIS character sets and Unicode. It uses
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// several large tables to do this, some of which are stored in
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// the resource section of the assembly for efficient access.
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internal unsafe sealed class JISConvert
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{
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// Table identifiers.
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private const int JISX0208_To_Unicode = 1;
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private const int JISX0212_To_Unicode = 2;
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private const int CJK_To_JIS = 3;
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private const int Greek_To_JIS = 4;
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private const int Extra_To_JIS = 5;
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// Public access to the conversion tables.
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#if __PNET__
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public byte *jisx0208ToUnicode;
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public byte *jisx0212ToUnicode;
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public byte *cjkToJis;
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public byte *greekToJis;
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public byte *extraToJis;
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#else
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public byte[] jisx0208ToUnicode;
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public byte[] jisx0212ToUnicode;
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public byte[] cjkToJis;
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public byte[] greekToJis;
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public byte[] extraToJis;
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#endif
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// Constructor.
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private JISConvert()
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{
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// Load the conversion tables.
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CodeTable table = new CodeTable("jis.table");
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jisx0208ToUnicode = table.GetSection(JISX0208_To_Unicode);
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jisx0212ToUnicode = table.GetSection(JISX0212_To_Unicode);
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cjkToJis = table.GetSection(CJK_To_JIS);
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greekToJis = table.GetSection(Greek_To_JIS);
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extraToJis = table.GetSection(Extra_To_JIS);
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table.Dispose();
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}
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// The one and only JIS conversion object in the system.
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private static JISConvert convert;
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static readonly object lockobj = new object ();
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// Get the primary JIS conversion object.
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public static JISConvert Convert
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{
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get
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{
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lock(lockobj)
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{
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if(convert != null)
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{
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return convert;
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}
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else
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{
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convert = new JISConvert();
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return convert;
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}
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}
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}
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}
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}; // class JISConvert
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}; // namespace I18N.CJK
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