public unsafe void Utilities_CanCopyBitRegion()
{
using (var from = new NativeArray <byte>(6, Allocator.Temp))
using (var to = new NativeArray <byte>(6, Allocator.Temp))
{
var fromPtr = (byte *)from.GetUnsafePtr();
var toPtr = (byte *)to.GetUnsafePtr();
fromPtr[0] = 0x00;
fromPtr[1] = 0x01;
fromPtr[2] = 0x12;
fromPtr[3] = 0x10;
fromPtr[4] = 0x88;
fromPtr[5] = 0xC1;
MemoryHelpers.MemCpyBitRegion(toPtr, fromPtr, 18, 4);
Assert.That(toPtr[0], Is.Zero);
Assert.That(toPtr[1], Is.Zero);
Assert.That(toPtr[2], Is.EqualTo(0x10));
Assert.That(toPtr[3], Is.Zero);
Assert.That(toPtr[4], Is.Zero);
Assert.That(toPtr[5], Is.Zero);
UnsafeUtility.MemClear(toPtr, 6);
MemoryHelpers.MemCpyBitRegion(toPtr, fromPtr, 28, 8);
Assert.That(toPtr[0], Is.Zero);
Assert.That(toPtr[1], Is.Zero);
Assert.That(toPtr[2], Is.Zero);
Assert.That(toPtr[3], Is.EqualTo(0x10));
Assert.That(toPtr[4], Is.EqualTo(0x08));
Assert.That(toPtr[5], Is.Zero);
UnsafeUtility.MemClear(toPtr, 6);
MemoryHelpers.MemCpyBitRegion(toPtr, fromPtr, 0, 6 * 8);
Assert.That(toPtr[0], Is.EqualTo(0x00));
Assert.That(toPtr[1], Is.EqualTo(0x01));
Assert.That(toPtr[2], Is.EqualTo(0x12));
Assert.That(toPtr[3], Is.EqualTo(0x10));
Assert.That(toPtr[4], Is.EqualTo(0x88));
Assert.That(toPtr[5], Is.EqualTo(0xC1));
}
}