convert uint to byte[]

[Huisheng Chen]

Hi all, I have a byte[] to unit function, I would like to have a reverse function that convert unit to byte[], please help. thanks a lot.

    public static uint ParseUint(byte\[\] buffer, int uintLengthInBytes, ref int offset)
    {
        uint value = 0;
        int i, j;
        for (i = offset + uintLengthInBytes - 1, j = 0; i >= offset; i--, j++)
            value |= (uint)(buffer\[i\] << (8 \* j));
        offset += uintLengthInBytes;
        return value;
    }

Regards, unruledboy_at_gmail_dot_com http://www.xnlab.com

[Lost User]

BitConverter.GetBytes

[Huisheng Chen]

hi, I know that method, the result is wrong. please take a closer look at the original code :doh:

Regards, unruledboy_at_gmail_dot_com http://www.xnlab.com

[Lost User]

What? Is it in Big Endian or something? Just Array.Reverse the result?

[Huisheng Chen]

sorry, my debugging mistake, you are right. thanks a lot.:rose:

Regards, unruledboy_at_gmail_dot_com http://www.xnlab.com

[Alan N]

Byte order reversal? Use System.BitConverter and System.Net.IPAddress.NetworkToHostOrder/HostToNetworkOrder. One I did earlier:

/// <summary>
/// Byte reverse the value and write to the buffer at ofs
/// </summary>
/// <param name="i">value to write</param>
/// <param name="ofs">Write offset in the buffer</param>
internal void WriteUInt32(UInt32 i, Int32 ofs, Byte\[\] buffer) {
  Int32 j = IPAddress.HostToNetworkOrder(unchecked((Int32)i));
  Byte\[\] b = BitConverter.GetBytes(j);
  b.CopyTo(buffer, ofs);
}

Alan.

[Lost User]

Nice! I'm going to remember that one

[Lost User]

You're welcome