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