intl/uconv/ucvcn/nsISO2022CNToUnicode.h

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
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   8  * http://www.mozilla.org/MPL/
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  10  * Software distributed under the License is distributed on an "AS IS" basis,
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  15  * The Original Code is mozilla.org code.
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  17  * The Initial Developer of the Original Code is
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  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Ervin Yan <Ervin.Yan@Sun.Com>
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  37  * ***** END LICENSE BLOCK ***** */
  38 #ifndef nsISO2022CNToUnicode_h__
  39 #define nsISO2022CNToUnicode_h__
  40 #include "nsCOMPtr.h"
  41 #include "nsISupports.h"
  42 #include "nsUCSupport.h"
  43
  44 #define MBYTE       0x8e
  45 #undef PMASK
  46 #define PMASK       0xa0
  47
  48 #define SI          0x0f
  49 #define SO          0x0e
  50 #define ESC         0x1b
  51 #define SS2         0x4e
  52 #define SS3         0x4f
  53
  54 class nsISO2022CNToUnicode : public nsBasicDecoderSupport
  55 {
  56 public:
  57   nsISO2022CNToUnicode() :
  58         mState(eState_ASCII),
  59         mPlaneID(0),
  60         mRunLength(0) { }
  61
  62   virtual ~nsISO2022CNToUnicode() {}
  63
  64   NS_IMETHOD Convert(const char *aSrc, PRInt32 * aSrcLength,
  65      PRUnichar * aDest, PRInt32 * aDestLength) ;
  66
  67   NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength,
  68      PRInt32 * aDestLength)
  69   {
  70     *aDestLength = aSrcLength;
  71     return NS_OK;
  72   }
  73
  74   NS_IMETHOD Reset()
  75   {
  76     mState = eState_ASCII;
  77     mPlaneID = 0;
  78     mRunLength = 0;
  79
  80     return NS_OK;
  81   }
  82
  83 private:
  84   // State Machine ID
  85   enum {
  86     eState_ASCII,
  87     eState_ESC,                           // ESC
  88     eState_ESC_24,                        // ESC $
  89
  90     eState_ESC_24_29,                     // ESC $ )
  91     eState_ESC_24_29_A,                   // ESC $ ) A
  92     eState_GB2312_1980,                   // ESC $ ) A SO
  93     eState_GB2312_1980_2ndbyte,           // ESC $ ) A SO
  94     eState_ESC_24_29_A_SO_SI,             // ESC $ ) A SO SI
  95     eState_ESC_24_29_G,                   // ESC $ ) G or H
  96     eState_CNS11643_1,                    // ESC $ ) G SO
  97     eState_CNS11643_1_2ndbyte,            // ESC $ ) G SO
  98     eState_ESC_24_29_G_SO_SI,             // ESC $ ) G SO SI
  99
 100     eState_ESC_24_2A,                     // ESC $ *
 101     eState_ESC_24_2A_H,                   // ESC $ * H
 102     eState_ESC_24_2A_H_ESC,               // ESC $ * H ESC
 103     eState_CNS11643_2,                    // ESC $ * H ESC SS2
 104     eState_CNS11643_2_2ndbyte,            // ESC $ * H ESC SS2
 105     eState_ESC_24_2A_H_ESC_SS2_SI,        // ESC $ * H ESC SS2 SI
 106     eState_ESC_24_2A_H_ESC_SS2_SI_ESC,    // ESC $ * H ESC SS2 SI ESC
 107
 108     eState_ESC_24_2B,                     // ESC $ +
 109     eState_ESC_24_2B_I,                   // ESC $ + I
 110     eState_ESC_24_2B_I_ESC,               // ESC $ + I ESC
 111     eState_CNS11643_3,                    // ESC $ + I ESC SS3
 112     eState_CNS11643_3_2ndbyte,            // ESC $ + I ESC SS3
 113     eState_ESC_24_2B_I_ESC_SS3_SI,        // ESC $ + I ESC SI
 114     eState_ESC_24_2B_I_ESC_SS3_SI_ESC,    // ESC $ + I ESC SI ESC
 115     eState_ERROR
 116   } mState;
 117
 118   char mData;
 119
 120   // Plane number for CNS11643 code
 121   int mPlaneID;
 122
 123   // Length of non-ASCII run
 124   PRUint32 mRunLength;
 125
 126   // Decoder handler
 127   nsCOMPtr<nsIUnicodeDecoder> mGB2312_Decoder;
 128   nsCOMPtr<nsIUnicodeDecoder> mEUCTW_Decoder;
 129
 130   NS_IMETHOD GB2312_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength,
 131      PRUnichar * aDest, PRInt32 * aDestLength) ;
 132
 133   NS_IMETHOD EUCTW_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength,
 134      PRUnichar * aDest, PRInt32 * aDestLength) ;
 135 };
 136 #endif // nsISO2022CNToUnicode_h__