res = gConverter->Convert(tmp.GetUnicode(),&conv);
res = gConverter->Convert(tmp.get(),&conv);
nsFontQTSubstitute::Convert(const PRUnichar *aSrc,PRUint32 aSrcLen,                            PRUnichar *aDest,PRUint32 aDestLen){  nsresult res;  if (!gConverter) {    nsComponentManager::CreateInstance(kSaveAsCharsetCID,nsnull,                                       NS_GET_IID(nsISaveAsCharset),                                       (void**)&gConverter);    if (gConverter) {      res = gConverter->Init("ISO-8859-1",                             nsISaveAsCharset::attr_FallbackQuestionMark                              + nsISaveAsCharset::attr_EntityBeforeCharsetConv,                             nsIEntityConverter::transliterate);      if (NS_FAILED(res)) {        NS_RELEASE(gConverter);      }    }  }  if (gConverter) {    nsAutoString tmp(aSrc,aSrcLen);    char *conv = nsnull;    res = gConverter->Convert(tmp.GetUnicode(),&conv);    if (NS_SUCCEEDED(res) && conv) {      char *p = conv;      PRUint32 i;      for (i = 0; i < aDestLen; i++) {        if (*p) {          aDest[i] = *p;        }        else {          break;        }        p++;      }      nsMemory::Free(conv);      conv = nsnull;      return i;    }  }  if (aSrcLen > aDestLen) {    aSrcLen = aDestLen;  }  for (PRUint32 i = 0; i < aSrcLen; i++) {    aDest[i] = '?';  }  return aSrcLen;}