public static void ChangePositioViaPointer()
{
byte[] data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 127, 255 };
int positionPointerByteArrayNumber = 3;
Byte[][] positionPointerByteArrays = new Byte[positionPointerByteArrayNumber][];
unsafe
{
fixed(byte *bytePtr = data)
{
//Scenario 1:ST - change the position via the PositionPointer
using (var stream = new UnmanagedMemoryStream(bytePtr, data.Length, data.Length, FileAccess.ReadWrite))
{
//we try positionPointerByteArrayNumber (10) different Byte[] arrays
for (int positionLoop = 0; positionLoop < positionPointerByteArrayNumber; positionLoop++)
{
//New Byte array
positionPointerByteArrays[positionLoop] = ArrayHelpers.CreateByteArray(length: 123, value: 24);
//change via PositionPointer
fixed(byte *invalidbytePtr = positionPointerByteArrays[positionLoop])
{
// not throw currently
stream.PositionPointer = invalidbytePtr;
VerifyNothingCanBeReadOrWritten(stream, data);
}
}
CheckStreamIntegrity(stream, data);
}
} // fixed
}
}