public static Encoding[] DetectInputCodepages(byte[] input, int maxEncodings)
{
if (maxEncodings < 1)
{
throw new ArgumentOutOfRangeException("at least one encoding must be returend", "maxEncodings");
}
if (input == null)
{
throw new ArgumentNullException("input");
}
if (input.Length == 0)
{
return(new Encoding[] { Encoding.ASCII });
}
if (input.Length < 256)
{
byte[] newInput = new byte[256];
int steps = 256 / input.Length;
for (int i = 0; i < steps; i++)
{
Array.Copy(input, 0, newInput, input.Length * i, input.Length);
}
int rest = 256 % input.Length;
if (rest > 0)
{
Array.Copy(input, 0, newInput, steps * input.Length, rest);
}
input = newInput;
}
List <Encoding> result = new List <Encoding>();
IMultiLanguage2 multilang2 = new FMultiLanguageClass();
if (multilang2 == null)
{
throw new System.Runtime.InteropServices.COMException("Failed to get IMultilang2");
}
try {
SDetectEncodingInfo[] detectedEncdings = new SDetectEncodingInfo[maxEncodings];
int scores = detectedEncdings.Length;
int srcLen = input.Length;
SMlDetectCp options = SMlDetectCp.MLDETECTCP_NONE;
multilang2.DetectInputCodepage(options, 0, ref input[0], ref srcLen, ref detectedEncdings[0], ref scores);
if (scores > 0)
{
for (int i = 0; i < scores; i++)
{
result.Add(Encoding.GetEncoding((int)detectedEncdings[i].nCodePage));
}
}
} finally {
Marshal.FinalReleaseComObject(multilang2);
}
return(result.ToArray());
}
public virtual extern void DetectInputCodepage([In] SMlDetectCp flags, [In] uint dwPrefWinCodePage,
[In] ref byte pSrcStr, [In, Out] ref int pcSrcSize,
[In, Out] ref SDetectEncodingInfo lpEncoding,
[In, Out] ref int pnScores);
public virtual extern void DetectCodepageInIStream([In] SMlDetectCp flags,
[In] uint dwPrefWinCodePage,
[In, MarshalAs(UnmanagedType.Interface)] IStream pstmIn,
[In, Out] ref SDetectEncodingInfo lpEncoding,
[In, Out] ref int pnScores);
