public static Encoding DetectEncoding(Stream stream, DetectOption flags)
{
Encoding encoding;
IMultiLanguage2 o = new CMultiLanguageClass() as IMultiLanguage2;
if (o == null)
{
byte[] buffer = new byte[4];
int dataLength = stream.Read(buffer, 0, buffer.Length);
return SimpleDetectEncoding(buffer, dataLength);
}
try
{
DetectEncodingInfo[] lpEncoding = new DetectEncodingInfo[1];
int length = lpEncoding.Length;
ComStream pstmIn = new ComStream(stream);
int errorCode = o.DetectCodepageInIStream(((MLDETECTCP) flags) & MLDETECTCP.MLDETECTCP_MASK, 0, pstmIn, lpEncoding, ref length);
switch (errorCode)
{
case 0:
case 1:
if (length <= 0)
{
break;
}
return Encoding.GetEncoding((int) lpEncoding[0].nCodePage);
default:
throw Marshal.GetExceptionForHR(errorCode);
}
encoding = null;
}
finally
{
Marshal.FinalReleaseComObject(o);
}
return encoding;
}
