public Byte[] Execute(Byte[] source)
{
ICRC check = getChecker();
byte[] d = check.ComputeChecksumBytes(source);
return(d);
}
private bool Check16citt(byte[] buffer, int offset, int length)
{
ICRC checker = getChecker();
if (checker == null)
{
throw new NotSupportedException(CRCType.ToString());
}
var tmp = getPayloadFromMsg16bitcitt(buffer);
var cs = checker.ComputeChecksumBytes(tmp);
int datalen = buffer[CctalkMessage.PosDataLen];
byte LSB = buffer[CctalkMessage.PosSourceAddr];
byte MSB = buffer[datalen + 4];
if (cs[0] != MSB || cs[1] != LSB)
{
Debug.WriteLine(string.Format("Bad Cksum {0}{1} (calculated {2}{3})",
String.Format("{0:x2}", MSB),
String.Format("{0:x2}", LSB),
String.Format("{0:x2}", cs[0]),
String.Format("{0:x2}", cs[1])));
return(false);
}
return(true);
}
public Byte[] Execute(Byte[] source)
{
ICRC check = this.cr[CRCType.CRC16];
byte[] d = check.ComputeChecksumBytes(source);
//this.arr[2] = d[1];
//this.arr[this.length - 1] = d[0];
return(d);
}
private bool Check8(byte[] messageInBytes, int offset, int length)
{
ICRC checker = getChecker();
if (checker == null)
{
throw new NotSupportedException(CRCType.ToString());
}
return(checker.ComputeChecksumBytes(messageInBytes)[0] == 0);
}
public void execute()
{
byte[] tmp = new byte[this.length - 2];
tmp[0] = this.arr[0];
tmp[1] = this.arr[1];
tmp[2] = this.arr[3];
for (int i = 0; i < this.arr[1]; i++)
{
tmp[3 + i] = this.arr[4 + i];
}
ICRC check = this.cr[CRCType.CRC16];
byte[] d = check.ComputeChecksumBytes(tmp);
this.arr[2] = d[1];
this.arr[this.length - 1] = d[0];
}
private void CalcAndApply8(Byte[] messageInBytes)
{
if (messageInBytes == null)
{
throw new ArgumentNullException("messageInBytes");
}
ICRC checker = getChecker();
if (checker == null)
{
throw new NotSupportedException(CRCType.ToString());
}
var checksumPlace = messageInBytes.Length - 1;
if (messageInBytes[checksumPlace] != 0)
{
throw new ArgumentException("Checksumm alredy set");
}
byte retByte = checker.ComputeChecksumBytes(messageInBytes)[0];
messageInBytes[checksumPlace] = retByte;
}