727 lines
19 KiB
C#
727 lines
19 KiB
C#
/*
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* CP51932.cs - Japanese EUC-JP code page.
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*
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* It is based on CP932.cs from Portable.NET
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*
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* Author:
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* Atsushi Enomoto <atsushi@ximian.com>
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*
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* Below are original (CP932.cs) copyright lines
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*
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* (C)2004 Novell Inc.
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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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/*
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jis.table is generated from uni2tab.c, which requires CP932.TXT and
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Unihan.txt as input files. However, it is non-normative and in Japan it is
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contains many problem.
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FIXME: Some characters such as 0xFF0B (wide "plus") are missing in
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that table.
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*/
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/*
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0x00-0x1F, 0x7F : control characters
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0x20-0x7E : ASCII
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0xA1A1-0xFEFE : Kanji (precisely, both bytes contain only A1-FE)
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0x8EA1-0x8EDF : half-width Katakana
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0x8FA1A1-0x8FFEFE : Complemental Kanji
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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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using System.Text;
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using I18N.Common;
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#if DISABLE_UNSAFE
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using MonoEncoder = I18N.Common.MonoSafeEncoder;
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using MonoEncoding = I18N.Common.MonoSafeEncoding;
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#endif
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[Serializable]
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public class CP51932 : MonoEncoding
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{
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// Magic number used by Windows for the EUC-JP code page.
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private const int EUC_JP_CODE_PAGE = 51932;
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// Constructor.
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public CP51932 () : base (EUC_JP_CODE_PAGE, 932)
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{
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}
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#if !DISABLE_UNSAFE
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public unsafe override int GetByteCountImpl (char* chars, int count)
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{
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return new CP51932Encoder (this).GetByteCountImpl (chars, count, true);
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}
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public unsafe override int GetBytesImpl (char* chars, int charCount, byte* bytes, int byteCount)
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{
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return new CP51932Encoder (this).GetBytesImpl (chars, charCount, bytes, byteCount, true);
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}
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#else
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public override int GetByteCount (char [] chars, int index, int length)
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{
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return new CP51932Encoder (this).GetByteCount (chars, index, length, true);
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}
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public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex)
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{
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return new CP51932Encoder (this).GetBytes (chars, charIndex, charCount, bytes, byteIndex, true);
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}
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#endif
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public override int GetCharCount (byte [] bytes, int index, int count)
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{
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return new CP51932Decoder ().GetCharCount (
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bytes, index, count, true);
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}
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public override int GetChars (
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byte [] bytes, int byteIndex, int byteCount,
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char [] chars, int charIndex)
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{
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return new CP51932Decoder ().GetChars (bytes,
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byteIndex, byteCount, chars, charIndex, true);
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}
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// Get the maximum number of bytes needed to encode a
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// specified number of characters.
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public override int GetMaxByteCount(int charCount)
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{
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if(charCount < 0)
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{
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throw new ArgumentOutOfRangeException
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("charCount",
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Strings.GetString("ArgRange_NonNegative"));
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}
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return charCount * 3;
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}
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// Get the maximum number of characters needed to decode a
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// specified number of bytes.
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public override int GetMaxCharCount(int byteCount)
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{
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if(byteCount < 0)
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{
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throw new ArgumentOutOfRangeException
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("byteCount",
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Strings.GetString ("ArgRange_NonNegative"));
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}
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return byteCount;
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}
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public override Encoder GetEncoder ()
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{
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return new CP51932Encoder (this);
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}
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public override Decoder GetDecoder ()
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{
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return new CP51932Decoder ();
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}
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#if !ECMA_COMPAT
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// Get the mail body name for this encoding.
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public override String BodyName {
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get { return "euc-jp"; }
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}
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// Get the human-readable name for this encoding.
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public override String EncodingName {
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get { return "Japanese (EUC)"; }
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}
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// Get the mail agent header name for this encoding.
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public override String HeaderName {
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get { return "euc-jp"; }
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}
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// Determine if this encoding can be displayed in a Web browser.
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public override bool IsBrowserDisplay {
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get { return true; }
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}
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// Determine if this encoding can be saved from a Web browser.
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public override bool IsBrowserSave {
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get { return true; }
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}
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// Determine if this encoding can be displayed in a mail/news agent.
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public override bool IsMailNewsDisplay {
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get { return true; }
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}
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// Determine if this encoding can be saved from a mail/news agent.
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public override bool IsMailNewsSave {
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get { return true; }
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}
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// Get the IANA-preferred Web name for this encoding.
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public override String WebName {
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get { return "euc-jp"; }
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}
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} // CP51932
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#endif // !ECMA_COMPAT
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public class CP51932Encoder : MonoEncoder
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{
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public CP51932Encoder (MonoEncoding encoding)
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: base (encoding)
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{
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}
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#if !DISABLE_UNSAFE
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// Get the number of bytes needed to encode a character buffer.
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public unsafe override int GetByteCountImpl (
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char* chars, int count, bool refresh)
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{
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// Determine the length of the final output.
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int index = 0;
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int length = 0;
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int ch, value;
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byte [] cjkToJis = JISConvert.Convert.cjkToJis;
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byte [] extraToJis = JISConvert.Convert.extraToJis;
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while (count > 0) {
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ch = chars [index++];
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--count;
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++length;
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if (ch < 0x0080) {
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// Character maps to itself.
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continue;
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} else if (ch < 0x0100) {
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// Check for special Latin 1 characters that
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// can be mapped to double-byte code points.
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if(ch == 0x00A2 || ch == 0x00A3 || ch == 0x00A7 ||
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ch == 0x00A8 || ch == 0x00AC || ch == 0x00B0 ||
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ch == 0x00B1 || ch == 0x00B4 || ch == 0x00B6 ||
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ch == 0x00D7 || ch == 0x00F7)
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{
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++length;
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}
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} else if (ch >= 0x0391 && ch <= 0x0451) {
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// Greek subset characters.
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++length;
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} else if (ch >= 0x2010 && ch <= 0x9FA5) {
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// This range contains the bulk of the CJK set.
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value = (ch - 0x2010) * 2;
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value = ((int) (cjkToJis[value])) | (((int)(cjkToJis[value + 1])) << 8);
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if(value >= 0x0100)
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++length;
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} else if(ch >= 0xFF01 && ch < 0xFF60) {
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// This range contains extra characters.
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value = (ch - 0xFF01) * 2;
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value = ((int)(extraToJis[value])) |
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(((int)(extraToJis[value + 1])) << 8);
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if(value >= 0x0100)
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++length;
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} else if(ch >= 0xFF60 && ch <= 0xFFA0) {
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++length; // half-width kana
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}
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}
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// Return the length to the caller.
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return length;
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}
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// Get the bytes that result from encoding a character buffer.
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public unsafe override int GetBytesImpl (
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char* chars, int charCount, byte* bytes, int byteCount, bool refresh)
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{
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int charIndex = 0;
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int byteIndex = 0;
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int end = charCount;
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// Convert the characters into their byte form.
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int posn = byteIndex;
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int byteLength = byteCount;
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int ch, value;
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byte[] cjkToJis = JISConvert.Convert.cjkToJis;
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byte[] greekToJis = JISConvert.Convert.greekToJis;
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byte[] extraToJis = JISConvert.Convert.extraToJis;
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for (int i = charIndex; i < end; i++, charCount--) {
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ch = chars [i];
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if (posn >= byteLength) {
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throw new ArgumentException (Strings.GetString ("Arg_InsufficientSpace"), "bytes");
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}
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if (ch < 0x0080) {
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// Character maps to itself.
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bytes[posn++] = (byte)ch;
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continue;
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} else if (ch >= 0x0391 && ch <= 0x0451) {
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// Greek subset characters.
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value = (ch - 0x0391) * 2;
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value = ((int)(greekToJis[value])) |
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(((int)(greekToJis[value + 1])) << 8);
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} else if (ch >= 0x2010 && ch <= 0x9FA5) {
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// This range contains the bulk of the CJK set.
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value = (ch - 0x2010) * 2;
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value = ((int) (cjkToJis[value])) |
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(((int)(cjkToJis[value + 1])) << 8);
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} else if (ch >= 0xFF01 && ch <= 0xFF60) {
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// This range contains extra characters,
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// including half-width katakana.
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value = (ch - 0xFF01) * 2;
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value = ((int) (extraToJis [value])) |
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(((int) (extraToJis [value + 1])) << 8);
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} else if (ch >= 0xFF60 && ch <= 0xFFA0) {
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value = ch - 0xFF60 + 0x8EA0;
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} else {
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// Invalid character.
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value = 0;
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}
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if (value == 0) {
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HandleFallback (
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chars, ref i, ref charCount,
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bytes, ref posn, ref byteCount, null);
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} else if (value < 0x0100) {
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bytes [posn++] = (byte) value;
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} else if ((posn + 1) >= byteLength) {
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throw new ArgumentException (Strings.GetString ("Arg_InsufficientSpace"), "bytes");
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} else if (value < 0x8000) {
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// general 2byte glyph/kanji
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value -= 0x0100;
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bytes [posn++] = (byte) (value / 0x5E + 0xA1);
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bytes [posn++] = (byte) (value % 0x5E + 0xA1);
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//Console.WriteLine ("{0:X04}", ch);
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continue;
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}
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else
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{
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// half-width kana
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bytes [posn++] = 0x8E;
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bytes [posn++] = (byte) (value - 0x8E00);
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}
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}
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// Return the final length to the caller.
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return posn - byteIndex;
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}
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#else
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// Get the number of bytes needed to encode a character buffer.
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public override int GetByteCount(char[] chars, int index, int count, bool flush)
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{
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// Determine the length of the final output.
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int length = 0;
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int ch, value;
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byte[] cjkToJis = JISConvert.Convert.cjkToJis;
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byte[] extraToJis = JISConvert.Convert.extraToJis;
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while (count > 0)
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{
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ch = chars[index++];
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--count;
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++length;
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if (ch < 0x0080)
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{
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// Character maps to itself.
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continue;
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}
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else if (ch < 0x0100)
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{
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// Check for special Latin 1 characters that
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// can be mapped to double-byte code points.
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if (ch == 0x00A2 || ch == 0x00A3 || ch == 0x00A7 ||
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ch == 0x00A8 || ch == 0x00AC || ch == 0x00B0 ||
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ch == 0x00B1 || ch == 0x00B4 || ch == 0x00B6 ||
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ch == 0x00D7 || ch == 0x00F7)
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{
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++length;
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}
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}
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else if (ch >= 0x0391 && ch <= 0x0451)
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{
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// Greek subset characters.
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++length;
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}
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else if (ch >= 0x2010 && ch <= 0x9FA5)
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{
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// This range contains the bulk of the CJK set.
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value = (ch - 0x2010) * 2;
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value = ((int)(cjkToJis[value])) | (((int)(cjkToJis[value + 1])) << 8);
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if (value >= 0x0100)
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++length;
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}
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else if (ch >= 0xFF01 && ch < 0xFF60)
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{
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// This range contains extra characters.
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value = (ch - 0xFF01) * 2;
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value = ((int)(extraToJis[value])) |
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(((int)(extraToJis[value + 1])) << 8);
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if (value >= 0x0100)
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++length;
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}
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else if (ch >= 0xFF60 && ch <= 0xFFA0)
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{
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++length; // half-width kana
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}
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}
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// Return the length to the caller.
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return length;
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}
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// Get the bytes that result from encoding a character buffer.
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public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex, bool flush)
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{
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// Convert the characters into their byte form.
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int posn = byteIndex;
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int byteLength = bytes.Length;
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int byteCount = bytes.Length;
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int end = charIndex + charCount;
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int ch, value;
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byte[] cjkToJis = JISConvert.Convert.cjkToJis;
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byte[] greekToJis = JISConvert.Convert.greekToJis;
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byte[] extraToJis = JISConvert.Convert.extraToJis;
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for (int i = charIndex; i < end; i++, charCount--)
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{
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ch = chars[i];
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if (posn >= byteLength)
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{
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throw new ArgumentException(Strings.GetString("Arg_InsufficientSpace"), "bytes");
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}
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if (ch < 0x0080)
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{
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// Character maps to itself.
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bytes[posn++] = (byte)ch;
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continue;
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}
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else if (ch >= 0x0391 && ch <= 0x0451)
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{
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// Greek subset characters.
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value = (ch - 0x0391) * 2;
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value = ((int)(greekToJis[value])) |
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(((int)(greekToJis[value + 1])) << 8);
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}
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else if (ch >= 0x2010 && ch <= 0x9FA5)
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{
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// This range contains the bulk of the CJK set.
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value = (ch - 0x2010) * 2;
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value = ((int)(cjkToJis[value])) |
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(((int)(cjkToJis[value + 1])) << 8);
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}
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else if (ch >= 0xFF01 && ch <= 0xFF60)
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{
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// This range contains extra characters,
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// including half-width katakana.
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value = (ch - 0xFF01) * 2;
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value = ((int)(extraToJis[value])) |
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(((int)(extraToJis[value + 1])) << 8);
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}
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else if (ch >= 0xFF60 && ch <= 0xFFA0)
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{
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value = ch - 0xFF60 + 0x8EA0;
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}
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else
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{
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// Invalid character.
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value = 0;
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}
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if (value == 0)
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{
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HandleFallback (chars, ref i, ref charCount,
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bytes, ref posn, ref byteCount, null);
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}
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else if (value < 0x0100)
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{
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bytes[posn++] = (byte)value;
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}
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else if ((posn + 1) >= byteLength)
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{
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throw new ArgumentException(Strings.GetString("Arg_InsufficientSpace"), "bytes");
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}
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else if (value < 0x8000)
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{
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// general 2byte glyph/kanji
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value -= 0x0100;
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bytes[posn++] = (byte)(value / 0x5E + 0xA1);
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bytes[posn++] = (byte)(value % 0x5E + 0xA1);
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//Console.WriteLine ("{0:X04}", ch);
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continue;
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}
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else
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{
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// half-width kana
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bytes[posn++] = 0x8E;
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bytes[posn++] = (byte)(value - 0x8E00);
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}
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}
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// Return the final length to the caller.
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return posn - byteIndex;
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}
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#endif
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} // CP51932Encoder
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internal class CP51932Decoder : DbcsEncoding.DbcsDecoder
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{
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public CP51932Decoder ()
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: base (null)
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{
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}
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int last_count, last_bytes;
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// Get the number of characters needed to decode a byte buffer.
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public override int GetCharCount (byte [] bytes, int index, int count)
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{
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return GetCharCount (bytes, index, count, false);
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}
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public override
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int GetCharCount (byte [] bytes, int index, int count, bool refresh)
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{
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CheckRange (bytes, index, count);
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// Determine the total length of the converted string.
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int value = 0;
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byte[] table0208 = JISConvert.Convert.jisx0208ToUnicode;
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byte[] table0212 = JISConvert.Convert.jisx0212ToUnicode;
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int length = 0;
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int byteval = 0;
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int last = last_count;
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while (count > 0) {
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byteval = bytes [index++];
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--count;
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if (last == 0) {
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if (byteval == 0x8F) {
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// SS3: One-time triple-byte sequence should follow.
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last = byteval;
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} else if (byteval <= 0x7F) {
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// Ordinary ASCII/Latin1/Control character.
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length++;
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} else if (byteval == 0x8E) {
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// SS2: One-time double-byte sequence should follow.
|
|
last = byteval;
|
|
} else if (byteval >= 0xA1 && byteval <= 0xFE) {
|
|
// First byte in a double-byte sequence.
|
|
last = byteval;
|
|
} else {
|
|
// Invalid first byte.
|
|
length++;
|
|
}
|
|
}
|
|
else if (last == 0x8E) {
|
|
// SS2 (One-time double-byte sequence)
|
|
if (byteval >= 0xA1 && byteval <= 0xDF) {
|
|
length++;
|
|
} else {
|
|
// Invalid second byte.
|
|
length++;
|
|
}
|
|
last =0;
|
|
}
|
|
else if (last == 0x8F) {
|
|
// SS3: 3-byte character
|
|
// FIXME: not supported (I don't think iso-2022-jp has)
|
|
last = byteval;
|
|
}
|
|
else
|
|
{
|
|
// Second byte in a double-byte sequence.
|
|
value = (last - 0xA1) * 0x5E;
|
|
last = 0;
|
|
if (byteval >= 0xA1 && byteval <= 0xFE)
|
|
{
|
|
value += (byteval - 0xA1);
|
|
}
|
|
else
|
|
{
|
|
// Invalid second byte.
|
|
last = 0;
|
|
length++;
|
|
continue;
|
|
}
|
|
|
|
value *= 2;
|
|
value = ((int) (table0208 [value]))
|
|
| (((int) (table0208 [value + 1])) << 8);
|
|
if (value == 0)
|
|
value = ((int) (table0212 [value]))
|
|
| (((int) (table0212 [value + 1])) << 8);
|
|
if (value != 0)
|
|
length++;
|
|
else
|
|
length++;
|
|
}
|
|
}
|
|
|
|
// seems like .NET 2.0 adds \u30FB for insufficient
|
|
// byte seuqence (for Japanese \u30FB makes sense).
|
|
if (refresh && last != 0)
|
|
length++;
|
|
else
|
|
last_count = last;
|
|
|
|
// Return the final length to the caller.
|
|
return length;
|
|
}
|
|
|
|
public override int GetChars (byte[] bytes, int byteIndex,
|
|
int byteCount, char[] chars,
|
|
int charIndex)
|
|
{
|
|
return GetChars (bytes, byteIndex, byteCount, chars, charIndex, false);
|
|
}
|
|
|
|
public override
|
|
int GetChars (byte[] bytes, int byteIndex,
|
|
int byteCount, char[] chars,
|
|
int charIndex, bool refresh)
|
|
{
|
|
CheckRange (bytes, byteIndex, byteCount, chars, charIndex);
|
|
|
|
// Decode the bytes in the buffer.
|
|
int posn = charIndex;
|
|
int charLength = chars.Length;
|
|
int byteval, value;
|
|
int last = last_bytes;
|
|
byte[] table0208 = JISConvert.Convert.jisx0208ToUnicode;
|
|
byte[] table0212 = JISConvert.Convert.jisx0212ToUnicode;
|
|
|
|
while (byteCount > 0) {
|
|
byteval = bytes [byteIndex++];
|
|
--byteCount;
|
|
if (last == 0) {
|
|
if (byteval == 0x8F) {
|
|
// SS3 (One-time triple-byte sequence) should follow.
|
|
last = byteval;
|
|
} else if (byteval <= 0x7F) {
|
|
// Ordinary ASCII/Latin1/Control character.
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = (char) byteval;
|
|
} else if (byteval == 0x8E) {
|
|
// SS2 (One-time double-byte sequence) should follow.
|
|
last = byteval;
|
|
} else if (byteval >= 0xA1 && byteval <= 0xFE) {
|
|
// First byte in a double-byte sequence.
|
|
last = byteval;
|
|
} else {
|
|
// Invalid first byte.
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = '\u30FB';
|
|
}
|
|
}
|
|
else if (last == 0x8E) {
|
|
// SS2 (One-time double-byte sequence)
|
|
if (byteval >= 0xA1 && byteval <= 0xDF) {
|
|
value = ((byteval - 0x40) |
|
|
(last + 0x71) << 8);
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = (char) value;
|
|
} else {
|
|
// Invalid second byte.
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = '\u30FB';
|
|
}
|
|
last =0;
|
|
}
|
|
else if (last == 0x8F) {
|
|
// SS3: 3-byte character
|
|
// FIXME: not supported (I don't think iso-2022-jp has)
|
|
last = byteval;
|
|
}
|
|
else
|
|
{
|
|
// Second byte in a double-byte sequence.
|
|
value = (last - 0xA1) * 0x5E;
|
|
last = 0;
|
|
if (byteval >= 0xA1 && byteval <= 0xFE)
|
|
{
|
|
value += (byteval - 0xA1);
|
|
}
|
|
else
|
|
{
|
|
// Invalid second byte.
|
|
last = 0;
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = '\u30FB';
|
|
continue;
|
|
}
|
|
|
|
value *= 2;
|
|
value = ((int) (table0208 [value]))
|
|
| (((int) (table0208 [value + 1])) << 8);
|
|
if (value == 0)
|
|
value = ((int) (table0212 [value]))
|
|
| (((int) (table0212 [value + 1])) << 8);
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
if (value != 0)
|
|
chars [posn++] = (char)value;
|
|
else
|
|
chars [posn++] = '\u30FB';
|
|
}
|
|
}
|
|
|
|
if (refresh && last != 0) {
|
|
// seems like .NET 2.0 adds \u30FB for insufficient
|
|
// byte seuqence (for Japanese \u30FB makes sense).
|
|
if (posn >= charLength)
|
|
throw Insufficient ();
|
|
chars [posn++] = '\u30FB';
|
|
}
|
|
else
|
|
last_bytes = last;
|
|
|
|
// Return the final length to the caller.
|
|
return posn - charIndex;
|
|
}
|
|
|
|
Exception Insufficient ()
|
|
{
|
|
throw new ArgumentException
|
|
(Strings.GetString
|
|
("Arg_InsufficientSpace"), "chars");
|
|
}
|
|
}; // class CP51932Decoder
|
|
|
|
[Serializable]
|
|
public class ENCeuc_jp : CP51932
|
|
{
|
|
public ENCeuc_jp () : base() {}
|
|
|
|
}; // class ENCeucjp
|
|
|
|
}; // namespace I18N.CJK
|