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101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#ifndef nsISO2022JPToUnicode_h___
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#define nsISO2022JPToUnicode_h___
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#include "nsUCvJa2Support.h"
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//----------------------------------------------------------------------
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// Class nsISO2022JPToUnicode [declaration]
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/**
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* A character set converter from ISO-2022-JP to Unicode.
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*
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* The state machine is:
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* S0 + ESC -> S1
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* S0 + * -> S0; convert using the current mCharset
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* S1 + '(' -> S2
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* S1 + '$' -> S3
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* S1 + * -> ERR
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* S2 + 'B' -> S0; mCharset = kASCII
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* S2 + 'J' -> S0; mCharset = kJISX0201_1976
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* S2 + 'I' -> S0; mCharset = kJISX0201_1976Kana [Not Std ISO-2022-JP]
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* S2 + * -> ERR
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* S3 + '@' -> S0; mCharset = kJISX0208_1978
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* S3 + 'B' -> S0; mCharset = kJISX0208_1983
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* S3 + '(' -> S4; [Not Std ISO-2022-JP]
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* S3 + * -> ERR
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* S4 + 'D' -> S0; mCharset = kJISX0212_1990 [Not Std ISO-2022-JP]
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* S4 + * -> ERR [Not Std ISO-2022-JP]
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* ERR + * -> ERR
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*
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* @created 09/Feb/1998
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* @author Catalin Rotaru [CATA]
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*/
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class nsISO2022JPToUnicode : public nsBufferDecoderSupport
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{
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public:
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/**
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* Class constructor.
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*/
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nsISO2022JPToUnicode();
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/**
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* Class destructor.
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*/
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virtual ~nsISO2022JPToUnicode();
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/**
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* Static class constructor.
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*/
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static nsresult CreateInstance(nsISupports ** aResult);
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protected:
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enum {
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kASCII,
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kJISX0201_1976,
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kJISX0208_1978,
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kJISX0208_1983,
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kJISX0201_1976Kana, // [Not Std ISO-2022-JP]
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kJISX0212_1990 // [Not Std ISO-2022-JP]
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};
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PRInt32 mState; // current state of the state machine
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PRInt32 mCharset; // current character set
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nsIUnicodeDecodeHelper * mHelper; // decoder helper object
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NS_IMETHOD ConvertBuffer(const char ** aSrc, const char * aSrcEnd,
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PRUnichar ** aDest, PRUnichar * aDestEnd);
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//--------------------------------------------------------------------
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// Subclassing of nsBufferDecoderSupport class [declaration]
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NS_IMETHOD ConvertNoBuff(const char * aSrc, PRInt32 * aSrcLength,
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PRUnichar * aDest, PRInt32 * aDestLength);
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NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength,
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PRInt32 * aDestLength);
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NS_IMETHOD Reset();
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};
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#endif /* nsISO2022JPToUnicode_h___ */
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