The Tor Browser: intl/uconv/ucvcn/nsUnicodeToGB2312V2.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsUnicodeToGB2312V2.h"

     7 #include "gbku.h"

     9 //----------------------------------------------------------------------

    10 // Class nsUnicodeToGB2312V2 [implementation]

    11 nsUnicodeToGB2312V2::nsUnicodeToGB2312V2() :

    12   nsEncoderSupport(2)

    13 {

    14 }

    16 NS_IMETHODIMP nsUnicodeToGB2312V2::ConvertNoBuff(const char16_t * aSrc,

    17                                                  int32_t * aSrcLength,

    18                                                  char * aDest,

    19                                                  int32_t * aDestLength)

    20 {

    21   int32_t iSrcLength = 0;

    22   int32_t iDestLength = 0;

    23   nsresult res = NS_OK;

    25   while (iSrcLength < *aSrcLength)

    26   {

    27     //if unicode's hi byte has something, it is not ASCII, must be a GB

    28     if(IS_ASCII(*aSrc))

    29     {

    30       // this is an ASCII

    31       *aDest = CAST_UNICHAR_TO_CHAR(*aSrc);

    32       aDest++; // increment 1 byte

    33       iDestLength +=1;

    34     } else {

    35       char byte1, byte2;

    36       if(mUtil.UnicodeToGBKChar(*aSrc, false, &byte1, &byte2))

    37       {

    38         if(iDestLength+2 > *aDestLength)

    39         {

    40           res = NS_OK_UENC_MOREOUTPUT;

    41           break;

    42         }

    43         aDest[0]=byte1;

    44         aDest[1]=byte2;

    45         aDest += 2;  // increment 2 bytes

    46         iDestLength +=2; // each GB char count as two in char* string

    47       } else {

    48         // cannot convert

    49         res= NS_ERROR_UENC_NOMAPPING;

    50         iSrcLength++;   // include length of the unmapped character

    51         break;

    52       }

    53     }

    54     iSrcLength++ ;   // each unicode char just count as one in char16_t* string

    55     aSrc++;

    56     if ( iDestLength >= (*aDestLength) && (iSrcLength < *aSrcLength ))

    57     {

    58       res = NS_OK_UENC_MOREOUTPUT;

    59       break;

    60     }

    61   }

    62   *aDestLength = iDestLength;

    63   *aSrcLength = iSrcLength;

    64   return res;

    65 }

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