static System.IntPtr AddressOfRef <T>(ref T t)
{
unsafe
{
System.TypedReference reference = __makeref(t);
System.TypedReference *pRef = &reference;
return((System.IntPtr)pRef); //(&pRef)
}
}
static System.IntPtr AddressOfRef <T>(ref T t)
//refember ReferenceTypes are references to the CLRHeader
//where TOriginal : struct
{
System.TypedReference reference = __makeref(t);
System.TypedReference *pRef = &reference;
return((System.IntPtr)pRef); //(&pRef)
}
static unsafe void InternalGetReference(void *arr, System.TypedReference *typedref, int ranks, int *rank_indices)
{
// idx = rightmost-index + 2nd-right * rightmost-size + 3rd-right * 2nd-right-size * right-size + ...
// rank checking is done by System.Array members in coreclr
int *lovals = *(int **)((byte *)arr + ArrayOperations.GetLoboundsOffset());
int *sizes = *(int **)((byte *)arr + ArrayOperations.GetSizesOffset());
// first get index of first rank
if (rank_indices[0] > sizes[0])
{
throw new IndexOutOfRangeException();
}
int index = rank_indices[0] - lovals[0];
// now repeat mul rank size; add rank index; rank-1 times
for (int rank = 1; rank < ranks; rank++)
{
if (rank_indices[rank] > sizes[rank])
{
throw new IndexOutOfRangeException();
}
index *= sizes[rank];
index += rank_indices[rank];
}
// get pointer to actual data
int et_size = *(int *)((byte *)arr + ArrayOperations.GetElemSizeOffset());
void *ptr = *(byte **)((byte *)arr + ArrayOperations.GetInnerArrayOffset()) + index * et_size;
// store to the typed reference
*(void **)((byte *)typedref + ClassOperations.GetTypedReferenceValueOffset()) = ptr;
*(void **)((byte *)typedref + ClassOperations.GetTypedReferenceTypeOffset()) =
*(void **)((byte *)arr + ArrayOperations.GetElemTypeOffset());
}