NS_IMETHODIMP nsUnicodeToGB2312V2::ConvertNoBuff(const PRUnichar * aSrc,
PRInt32 * aSrcLength,
char * aDest,
PRInt32 * aDestLength)
{
PRInt32 iSrcLength = 0;
PRInt32 iDestLength = 0;
nsresult res = NS_OK;
while (iSrcLength < *aSrcLength)
{
//if unicode's hi byte has something, it is not ASCII, must be a GB
if(IS_ASCII(*aSrc))
{
// this is an ASCII
*aDest = CAST_UNICHAR_TO_CHAR(*aSrc);
aDest++; // increment 1 byte
iDestLength +=1;
} else {
char byte1, byte2;
if(mUtil.UnicodeToGBKChar(*aSrc, false, &byte1, &byte2))
{
if(iDestLength+2 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
aDest[0]=byte1;
aDest[1]=byte2;
aDest += 2; // increment 2 bytes
iDestLength +=2; // each GB char count as two in char* string
} else {
// cannot convert
res= NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
}
iSrcLength++ ; // each unicode char just count as one in PRUnichar* string
aSrc++;
if ( iDestLength >= (*aDestLength) && (iSrcLength < *aSrcLength ))
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
}
*aDestLength = iDestLength;
*aSrcLength = iSrcLength;
return res;
}
NS_IMETHODIMP nsUnicodeToGBK::ConvertNoBuff(
const PRUnichar * aSrc,
PRInt32 * aSrcLength,
char * aDest,
PRInt32 * aDestLength)
{
PRInt32 iSrcLength = 0;
PRInt32 iDestLength = 0;
PRUnichar unicode;
nsresult res = NS_OK;
while (iSrcLength < *aSrcLength )
{
unicode = *aSrc;
//if unicode's hi byte has something, it is not ASCII, must be a GB
if(IS_ASCII(unicode))
{
// this is an ASCII
*aDest = CAST_UNICHAR_TO_CHAR(*aSrc);
aDest++; // increment 1 byte
iDestLength +=1;
} else {
char byte1, byte2;
if(mUtil.UnicodeToGBKChar( unicode, false, &byte1, &byte2))
{
// make sure we still have 2 bytes for output first
if(iDestLength+2 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
aDest[0] = byte1;
aDest[1] = byte2;
aDest += 2; // increment 2 bytes
iDestLength +=2;
} else {
PRInt32 aOutLen = 2;
// make sure we still have 2 bytes for output first
if(iDestLength+2 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
// we cannot map in the common mapping. Let's try to
// call the delegated 2 byte converter for the gbk or gb18030
// unique 2 byte mapping
if(TryExtensionEncoder(unicode, aDest, &aOutLen))
{
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// make sure we still have 4 bytes for output first
if(iDestLength+4 > *aDestLength)
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
// we still cannot map. Let's try to
// call the delegated GB18030 4 byte converter
aOutLen = 4;
if( NS_IS_HIGH_SURROGATE(unicode) )
{
if((iSrcLength+1) < *aSrcLength ) {
if(EncodeSurrogate(aSrc[0],aSrc[1], aDest)) {
// since we got a surrogate pair, we need to increment src.
iSrcLength++ ;
aSrc++;
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// only get a high surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
mSurrogateHigh = aSrc[0];
break; // this will go to afterwhileloop
}
} else {
if( NS_IS_LOW_SURROGATE(unicode) )
{
if(NS_IS_HIGH_SURROGATE(mSurrogateHigh)) {
if(EncodeSurrogate(mSurrogateHigh, aSrc[0], aDest)) {
iDestLength += aOutLen;
aDest += aOutLen;
} else {
// only get a high surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
// only get a low surrogate, but not a low surrogate
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
} else {
if(Try4BytesEncoder(unicode, aDest, &aOutLen))
{
NS_ASSERTION((aOutLen == 4), "we should always generate 4 bytes here");
iDestLength += aOutLen;
aDest += aOutLen;
} else {
res = NS_ERROR_UENC_NOMAPPING;
iSrcLength++; // include length of the unmapped character
break;
}
}
}
}
}
}
iSrcLength++ ; // Each unicode char just count as one in PRUnichar string;
mSurrogateHigh = 0;
aSrc++;
if ( iDestLength >= (*aDestLength) && (iSrcLength < *aSrcLength) )
{
res = NS_OK_UENC_MOREOUTPUT;
break;
}
}
//afterwhileloop:
*aDestLength = iDestLength;
*aSrcLength = iSrcLength;
return res;
}