protected virtual void Feed(byte[] buf, int offset, int len)
{
if (_done)
{
return;
}
if (len > 0)
{
_gotData = true;
}
// If the data starts with BOM, we know it is UTF
if (_start)
{
var bomSet = FindCharSetByBom(buf, len);
_start = false;
if (bomSet != null)
{
_detectionDetail = new DetectionDetail(bomSet, 1);
_done = true;
return;
}
}
FindInputState(buf, len);
switch (InputState)
{
case InputState.EscASCII:
_escCharsetProber = _escCharsetProber ?? new EscCharsetProber();
RunProber(buf, offset, len, _escCharsetProber);
break;
case InputState.Highbyte:
for (int i = 0; i < ProbersNum; i++)
{
var charsetProber = _charsetProbers[i];
if (charsetProber != null)
{
var found = RunProber(buf, offset, len, charsetProber);
if (found)
{
return;
}
}
}
break;
// else pure ascii
}
}
private bool IsStartsWithBom(byte[] buf, int len)
{
var bomSet = FindCharSetByBom(buf, len);
if (bomSet != null)
{
_detectionDetail = new DetectionDetail(bomSet, 1.0f);
return(true);
}
return(false);
}
private bool RunProber(byte[] buf, int offset, int len, CharsetProber charsetProber)
{
var probingState = charsetProber.HandleData(buf, offset, len);
if (probingState == ProbingState.FoundIt)
{
_detectionDetail = new DetectionDetail(charsetProber);
return(true);
}
return(false);
}
/// <summary>
/// Single result
/// </summary>
/// <param name="detectionDetail"></param>
public DetectionResult(DetectionDetail detectionDetail)
{
Details = new List <DetectionDetail> {
detectionDetail
};
}