intl/uconv/ucvcn/nsGB2312ToUnicodeV2.cpp

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   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
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla Communicator client code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Intel Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1999
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   Yueheng Xu <yuheng.xu@intel.com>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either of the GNU General Public License Version 2 or later (the "GPL"),
  27  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
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  37  * ***** END LICENSE BLOCK ***** */
  38 // =======================================================================
  39 // Original Author: Yueheng Xu
  40 // email: yueheng.xu@intel.com
  41 // phone: (503)264-2248
  42 // Intel Corporation, Oregon, USA
  43 // Last Update: September 7, 1999
  44 // Revision History:
  45 // 09/07/1999 - initial version. Based on exisiting nsGB2312ToUnicode.cpp. Removed
  46 //              dependecy on those shift/map tables. Now we only depend on gbku.h.
  47 // 09/28/1999 - changed to use the same table and code as GBKToUnicode converter
  48 // ======================================================================================
  49
  50 #if 0
  51 #include "nsGB2312ToUnicodeV2.h"
  52 #include "nsUCvCnDll.h"
  53 #include "gbku.h"
  54 //----------------------------------------------------------------------
  55 // Class nsGB2312ToUnicodeV2 [implementation]
  56 //----------------------------------------------------------------------
  57 // Subclassing of nsTablesDecoderSupport class [implementation]
  58 NS_IMETHODIMP nsGB2312ToUnicodeV2::GetMaxLength(const char * aSrc,
  59                                               PRInt32 aSrcLength,
  60                                               PRInt32 * aDestLength)
  61 {
  62   *aDestLength = aSrcLength;
  63   return NS_OK;
  64 }
  65 NS_IMETHODIMP nsGB2312ToUnicodeV2::ConvertNoBuff(const char* aSrc,
  66                                                  PRInt32 * aSrcLength,
  67                                                  PRUnichar *aDest,
  68                                                  PRInt32 * aDestLength)
  69 {
  70   PRInt32 i=0;
  71   PRInt32 iSrcLength = (*aSrcLength);
  72   PRInt32 iDestlen = 0;
  73   nsresult rv = NS_OK;
  74   for (i=0;i<iSrcLength;i++)
  75   {
  76     if ( iDestlen >= (*aDestLength) )
  77     {
  78       rv = NS_OK_UDEC_MOREOUTPUT;
  79       break;
  80     }
  81     if(UINT8_IN_RANGE(0xa1, *aSrc, 0xfe))
  82     {
  83       if(i+1 >= iSrcLength)
  84       {
  85         rv = NS_OK_UDEC_MOREINPUT;
  86         break;
  87       }
  88       // To make sure, the second byte has to be checked as well
  89       // The valid 2nd byte range: [0xA1,0xFE]
  90       if(UINT8_IN_RANGE(0xa1, aSrc[1], 0xfe))
  91       {
  92         // Valid GB 2312 code point
  93         *aDest = mUtil.GBKCharToUnicode(aSrc[0], aSrc[1]);
  94         aSrc += 2;
  95         i++;
  96       } else {
  97         // Invalid GB 2312 code point
  98         *aDest =  UCS2_NO_MAPPING;
  99         aSrc++;
 100       }
 101     } else {
 102       if(IS_ASCII(*aSrc))
 103       {
 104         // The source is an ASCII
 105         *aDest = CAST_CHAR_TO_UNICHAR(*aSrc);
 106       } else {
 107         *aDest =  UCS2_NO_MAPPING;
 108       }
 109       aSrc++;
 110     }
 111     iDestlen++;
 112     aDest++;
 113     *aSrcLength = i+1;
 114   }
 115   *aDestLength = iDestlen;
 116   return rv;
 117 }
 118 #endif