/// <summary>
/// Gets type size in unmanaged memory (directly in SOH/LOH) by type
/// </summary>
public static unsafe int SizeOf(EntityInfo *entity)
{
var flags = (uint)entity->MethodTable->Flags;
var flags2 = (uint)entity->MethodTable->AdditionalFlags;
// if boxed elementary type
if (flags == 0x00270000)
{
return(entity->MethodTable->Size);
}
// Array
if ((flags & 0xffff0000) == 0x800a0000)
{
var arrayinfo = (ArrayInfo *)entity;
return(arrayinfo->SizeOf());
}
// ???
if ((flags & 0xffff0000) == 0x01400200)
{
return(entity->MethodTable->Size);
}
// COM interface: have no size and have no .Net class
if ((flags & 0xffff0000) == 0x000c0000)
{
return(SizeOf <object>());
}
// String
if ((entity->MethodTable) == StringTypeHandle.ToPointer())
{
// TODO: on 4th nedds to be tested
if (MajorNetVersion >= 4)
{
var length = *(int *)((int)entity + 8);
return(4 * ((14 + 2 * length + 3) / 4));
}
else
{
// on 1.0 -> 3.5 string have additional RealLength field
var length = *(int *)((int)entity + 12);
return(4 * ((16 + 2 * length + 3) / 4));
}
}
else if ((flags2 & (int)MethodTableFlags2.IsInterface) != 0 ||
((flags & (int)MethodTableFlags.InternalCorElementTypeExtraInfoMask) == (int)MethodTableFlags.InternalCorElementTypeExtraInfo_IfNotArrayThenClass))
{
return(entity->MethodTable->Size);
}
else if ((flags & (int)MethodTableFlags.InternalCorElementTypeExtraInfoMask) == (int)MethodTableFlags.InternalCorElementTypeExtraInfo_IfNotArrayThenValueType)
{
return(entity->MethodTable->Size);
}
return(entity->MethodTable->Size);
}
private static unsafe int SizeOf(EntityInfo *entity)
{
var flags = (uint)entity->MethodTable->Flags;
// if boxed elementary type
if (flags == 0x00270000)
{
return(entity->MethodTable->Size);
}
// Array
if ((flags & 0xffff0000) == 0x800a0000)
{
return(((ArrayInfo *)entity)->SizeOf());
}
// ???
if ((flags & 0xffff0000) == 0x01400200)
{
return(entity->MethodTable->Size);
}
// COM interface: have no size and have no .Net class
if ((flags & 0xffff0000) == 0x000c0000)
{
return(SizeOf <object>());
}
// String
if (entity->MethodTable != typeof(string).TypeHandle.Value.ToPointer())
{
return(entity->MethodTable->Size);
}
return(Environment.Version.Major >= 4
? 4 * ((14 + 2 * *(int *)((int)entity + 8) + 3) / 4)
: 4 * ((16 + 2 * *(int *)((int)entity + 12) + 3) / 4));
// on 1.0 -> 3.5 string have additional RealLength field
}