Byte Swap Class

  • Thread starter Thread starter O.B.
  • Start date Start date
O

O.B.

Is the following the best way to do byte swapping in C#? Or is there
something like this already built into the framework and I'm just
overlooking it?

class ByteSwap {
public static UInt16 swap(UInt16 input) {
return ((UInt16)(
((0xFF00 & input) >> 8) |
((0x00FF & input) << 8)));
}

public static UInt32 swap(UInt32 input) {
return ((UInt32)(
((0xFF000000 & input) >> 24) |
((0x00FF0000 & input) >> 8) |
((0x0000FF00 & input) << 8) |
((0x000000FF & input) << 24)));
}

public static float swap(float input) {
byte[] tmpIn = BitConverter.GetBytes(input);
byte[] tmpOut = new byte[4];
tmpOut[0] = tmpIn[3];
tmpOut[1] = tmpIn[2];
tmpOut[2] = tmpIn[1];
tmpOut[3] = tmpIn[0];
return BitConverter.ToSingle(tmpOut, 0);
}

public static double swap(double input) {
byte[] tmpIn = BitConverter.GetBytes(input);
byte[] tmpOut = new byte[8];
tmpOut[0] = tmpIn[7];
tmpOut[1] = tmpIn[6];
tmpOut[2] = tmpIn[5];
tmpOut[3] = tmpIn[4];
tmpOut[4] = tmpIn[3];
tmpOut[5] = tmpIn[2];
tmpOut[6] = tmpIn[1];
tmpOut[7] = tmpIn[0];
return BitConverter.ToSingle(tmpOut, 0);
}
}
 
O.B. said:
Is the following the best way to do byte swapping in C#? Or is there
something like this already built into the framework and I'm just
overlooking it?
Click to expand...

I'm not aware of anything like that in the framework. I've got versions
of BitConverter which allow you to specify the endianness, but they're
not quite the same. See
http://www.pobox.com/~skeet/csharp/miscutil
if you're interested.
 
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