michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsUnicodeToGB2312V2.h"
michael@0: #include "gbku.h"
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Class nsUnicodeToGB2312V2 [implementation]
michael@0: nsUnicodeToGB2312V2::nsUnicodeToGB2312V2() :
michael@0:   nsEncoderSupport(2)
michael@0: {
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsUnicodeToGB2312V2::ConvertNoBuff(const char16_t * aSrc, 
michael@0:                                                  int32_t * aSrcLength, 
michael@0:                                                  char * aDest, 
michael@0:                                                  int32_t * aDestLength)
michael@0: {
michael@0:   int32_t iSrcLength = 0;
michael@0:   int32_t iDestLength = 0;
michael@0:   nsresult res = NS_OK;
michael@0:   
michael@0:   while (iSrcLength < *aSrcLength)
michael@0:   {
michael@0:     //if unicode's hi byte has something, it is not ASCII, must be a GB
michael@0:     if(IS_ASCII(*aSrc))
michael@0:     {
michael@0:       // this is an ASCII
michael@0:       *aDest = CAST_UNICHAR_TO_CHAR(*aSrc);
michael@0:       aDest++; // increment 1 byte
michael@0:       iDestLength +=1;
michael@0:     } else {
michael@0:       char byte1, byte2;
michael@0:       if(mUtil.UnicodeToGBKChar(*aSrc, false, &byte1, &byte2))
michael@0:       {
michael@0:         if(iDestLength+2 > *aDestLength) 
michael@0:         {
michael@0:           res = NS_OK_UENC_MOREOUTPUT;
michael@0:           break;
michael@0:         }
michael@0:         aDest[0]=byte1;
michael@0:         aDest[1]=byte2;
michael@0:         aDest += 2;  // increment 2 bytes
michael@0:         iDestLength +=2; // each GB char count as two in char* string
michael@0:       } else {
michael@0:         // cannot convert
michael@0:         res= NS_ERROR_UENC_NOMAPPING;
michael@0:         iSrcLength++;   // include length of the unmapped character
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:     iSrcLength++ ;   // each unicode char just count as one in char16_t* string
michael@0:     aSrc++;  
michael@0:     if ( iDestLength >= (*aDestLength) && (iSrcLength < *aSrcLength ))
michael@0:     {
michael@0:       res = NS_OK_UENC_MOREOUTPUT;
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0:   *aDestLength = iDestLength;
michael@0:   *aSrcLength = iSrcLength;
michael@0:   return res;
michael@0: }