2014-06-26 16:08 GMT+08:00 Piotr Caban piotr.caban@gmail.com:
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.
Thank you Piotr. I get it.
You also need to handle res==NULL case here.
I guess you mean that I need to handle res==NULL case in branch if(V_VT(arg) == VT_NULL), right?
There is another problem: though Abs(Null) should return Null according to http://msdn.microsoft.com/en-us/library/307330xe(v=vs.84).aspx , but I test it in WINXP, i.e. when arg == Null, the vbscript code: Call Abs(Null) and dim b b = Abs(Null) MsgBox b returns an error.