/// <summary>
/// Computes a CRC 16 checksum of the specified bytes using the given algorithm
/// </summary>
/// <param name="algorithm">The CRC 16 Algorithm to use</param>
/// <param name="bytes">The buffer to compute the CRC upon</param>
/// <param name="start">The start index upon which to compute the CRC</param>
/// <param name="length">The length of the buffer upon which to compute the CRC</param>
/// <returns>The specified CRC</returns>
public static ushort ComputeChecksum(Crc16Algorithm algorithm, byte[] bytes, int start, int length)
{
switch (algorithm)
{
case Crc16Algorithm.Standard:
return(Standard.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.Ccitt:
return(CcittInitialZero.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.CcittKermit:
return(CcittKermit.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.CcittInitialValue0xFFFF:
return(CcittInitial0xFFFF.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.CcittInitialValue0x1D0F:
return(CcittInitial0x1D0F.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.Dnp:
return(Dnp.ComputeChecksum(bytes, start, length));
case Crc16Algorithm.Modbus:
return(Standard.ComputeChecksum(bytes, start, length, ushort.MaxValue));
}
throw new UnknownAlgorithmException("Unknown Algorithm");
}
public ScriptSettings(IZeusInput input, MyMeta.dbRoot database, Dnp.Utils.Utils dnp, string version)
{
this._input = input;
this._database = database;
this._version = version;
this._dnpUtils = dnp;
}
public ProgressDialogWrapper(Dnp.Utils.ProgressDialog progressDialog)
{
_progressDialog = progressDialog;
script = ScriptSettings.GetInstance();
}
public static ScriptSettings InitInstance(IZeusInput input, MyMeta.dbRoot database, Dnp.Utils.Utils dnp, string version)
{
if (_instance == null)
{
if (input == null)
throw new ApplicationException("InitInstance input");
if (database == null)
throw new ApplicationException("InitInstance database");
if (dnp == null)
throw new ApplicationException("InitInstance dnp");
if (string.IsNullOrEmpty(version))
throw new ApplicationException("InitInstance version");
_instance = new ScriptSettings(input, database, dnp, version);
}
return _instance;
}
