Re: [PATCH 4/4] vbscript: Implemented Abs(try 2)

[Piotr Caban]

On 06/26/14 06:05, Shuai Meng wrote:
> Hi,
> I notice that Abs(Null) should return Null according to
> http://msdn.microsoft.com/en-us/library/307330xe(v=vs.84).aspx
>
> In wine source code, NULL is defined as 0 in
> file dlls/windowscodecs/ungif.h, line 66. I have tried to write like this:
> 1260     if(V_VT(arg) == VT_NULL) {
> 1261         V_VT(res) = VT_NULL;
> 1262         V_NULL(res) = NULL;
> 1263     }

In case of VT_NULL variant type there's no need to set variant value. 
You only need to set V_VT(res) to VT_NULL. You also need to handle 
res==NULL case here.