C#

unsafe uint crc16(char* pBuf, ushort Len, ushort InitialCrc)
{
    uint crc = 0, i = 0;

    crc = 0;
    for (i = 0; i < Len; i++)
    {
        crc = (crc >> 8) | (crc << 8);
        crc = crc ^ *pBuf;
        crc = crc ^ ((crc & 0xff) >> 4);
        crc = crc ^ (crc << 12);
        crc = crc ^ ((crc & 0xff) << 5);
        pBuf++;
    }
    return (crc);
}

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The only programmers that are better that C programmers are those who code in 1's and 0's


Programm3r
My Blog: ^_^

Programm3r wrote:

The other problem is how can I convert string to char*

string foo = "Hello World";

fixed (char* fp = foo)
{
  var i = crc16(fp, (ushort) foo.Length, 0);
}

Programm3r wrote:

Would you say that the Crc method look good after my C# interpretation?

static unsafe ushort crc16(char* pBuf, int Len, ushort InitialCrc)
{
  ushort crc = InitialCrc; //?

  for (int i = 0; i < Len; i++)
  {
    crc = (ushort)((crc >> 8) | (crc << 8));
    crc = (ushort)(crc ^ *pBuf);
    crc = (ushort)(crc ^ ((crc & 0xff) >> 4));
    crc = (ushort)(crc ^ (crc << 12));
    crc = (ushort)(crc ^ ((crc & 0xff) << 5));
    pBuf++;
  }

  return crc;
}

ushort crc16(string buffer) {
   ushort crc = 0;
   foreach (char c in buffer) {
      crc = (crc >> 8) | (crc << 8);
      crc ^= (ushort)c;
      crc ^= (crc & 0xff) >> 4;
      crc ^= crc << 12;
      crc ^= (crc & 0xff) << 5;
   }
   return crc;
}

<br />
string ConnectionString = String.Concat("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=", textBox1.Text ,";Extended Properties=""Excel 8.0;HDR=YES;"""; ) ;<br />

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The only programmers that are better that C programmers are those who code in 1's and 0's


Programm3r
My Blog: ^_^

string ConnectionString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;""", textBox1.Text)