/// <summary>
/// return HeartBeat or null
/// </summary>
/// <returns></returns>
public override object ToValue()
{
if (LanDiDef.HEAD.IsMatch(_bytes, 0))
{
DataField dfTail = new DataField(
_bytes.Length - 2,
2,
LanDiDef.TAIL.Values
);
if (dfTail.IsMatch(_bytes, 0))
{
int ipstrPos = LanDiDef.IPSTR.SearchBeginPos(_bytes);
if (ipstrPos != -1)
{
DataField dfSimNumber = new DataField(
LanDiDef.HEAD_LENGTH,
ipstrPos - LanDiDef.HEAD_LENGTH
);
byte[] simBytes = dfSimNumber.GetMatch(_bytes);
DataField dfIP = new DataField(
ipstrPos + LanDiDef.IPSTR.DataLength,
_bytes.Length - (ipstrPos + LanDiDef.IPSTR.DataLength + LanDiDef.TAIL_LENGTH)
);
byte[] ipBytes = dfIP.GetMatch(_bytes);
string sim = ASCIIEncoding.ASCII.GetString(simBytes);
string ip = ASCIIEncoding.ASCII.GetString(ipBytes);
return(new HeartBeat(sim, ip));
}
}
}
return(null);
}
/// <summary>
///
/// </summary>
/// <param name="datas"></param>
/// <returns></returns>
public byte[][] Picker(byte[] datas)
{
if (datas == null || datas.Length < _minLen)
{
return(null);
}
ArrayList al = new ArrayList();
for (int i = 0; i < datas.Length - _minLen; i++)
{
if (_head.IsMatch(datas, i) &&
_devType.IsMatch(datas, i))
{
byte[] bs = _innerDataLen.GetMatch(datas, i);
// idl - inner data length
int idl = bs[0];
if (idl + _minLen + i <= datas.Length)
{
DataField df = new DataField(0, idl + _minLen);
byte[] aGrData = df.GetMatch(datas, i);
al.Add(aGrData);
}
}
}
return(ArraylistToByteDim2(al));
}