public void TestDataBufferCopy()
{
long length = 400000L;
DataBuffer <double> rootBuffer = new DataBuffer <double>(length);
DataBuffer <double> childBufferL2 = new DataBuffer <double>(rootBuffer, 100L, length - 200L);
IDataBuffer <double> childBufferL2Copy = childBufferL2.ShallowCopy();
Assert.AreSame(childBufferL2.Data, childBufferL2Copy.Data);
Assert.AreSame(childBufferL2.GetUnderlyingBuffer(), childBufferL2Copy.GetUnderlyingBuffer());
Assert.AreSame(childBufferL2.GetUnderlyingRootBuffer(), childBufferL2Copy.GetUnderlyingRootBuffer());
Assert.AreEqual(childBufferL2.Length, childBufferL2Copy.Length);
Assert.AreEqual(childBufferL2.Offset, childBufferL2Copy.Offset);
Assert.AreEqual(childBufferL2.RelativeOffset, childBufferL2Copy.RelativeOffset);
}
/// <summary>
/// Create a data buffer of a certain type with a certain underlying buffer.
/// </summary>
/// <param name="underlyingBuffer">The underlying buffer.</param>
/// <param name="offset">The offset relative to the underlying buffer.</param>
/// <param name="length">The length this buffer should have.</param>
public DataBuffer(IDataBuffer <T> underlyingBuffer, long offset, long length)
{
if (underlyingBuffer == null)
{
throw new ArgumentNullException(nameof(underlyingBuffer));
}
CheckBufferBounds(offset, length, offset + length, underlyingBuffer.Length);
Length = length;
RelativeOffset = offset;
Offset = offset + underlyingBuffer.Offset;
_data = underlyingBuffer.Data;
Type = underlyingBuffer.Type;
_underlyingBuffer = underlyingBuffer;
_underlyingRootBuffer = underlyingBuffer.GetUnderlyingRootBuffer() == null ? underlyingBuffer : underlyingBuffer.GetUnderlyingRootBuffer();
}