/// <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");
}
/// <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>
/// <returns>The specified CRC</returns>
public static ushort ComputeChecksum(Crc16Algorithm algorithm, params byte[] bytes)
{
return(ComputeChecksum(algorithm, bytes, 0, bytes?.Length ?? 0));
}
public UnknownAlgorithmException(Crc16Algorithm algorithm)
{
this.Algorithm = algorithm;
}
