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

[Shuai Meng]

2014-06-17 17:40 GMT+08:00 Jacek Caban :
> On 06/17/14 07:59, Shuai Meng wrote:
> > diff --git a/dlls/vbscript/global.c b/dlls/vbscript/global.c
> > index 5357df8..c2b2edd 100644
> > --- a/dlls/vbscript/global.c
> > +++ b/dlls/vbscript/global.c
> > @@ -602,8 +602,52 @@ static HRESULT Global_Oct(vbdisp_t *This, VARIANT
>
> *arg, unsigned args_cnt, VARIA
> > static HRESULT Global_VarType(vbdisp_t *This, VARIANT *arg, unsigned
>
> args_cnt, VARIANT *res)
> > {
> > - FIXME("\n");
> > - return E_NOTIMPL;
> > - TRACE("(%s)\n", debugstr_variant(arg));
> > -
> > - assert(args_cnt == 1);
> > -
> > - if(res) {
> > -
> >    V_VT(res) = VT_I2;
> > -
> >    switch(V_VT(arg)) {
> > -
> >        case VT_EMPTY:
> > -
> >            V_I2(res) = VT_EMPTY;
> > -
> >            break;
> > -
> >        case VT_NULL:
> > -
> >            V_I2(res) = VT_NULL;
> > -
> >            break;
> > -
> >        case VT_I2:
> > -
> >            V_I2(res) = VT_I2;
> > -
> >            break;
>
> (...)
>
> This all could be just:
>
> V_I2(res) = V_VT(arg);
>
> To handle unsupported types, you could use something like:
>
> if(V_VT(arg) & ~VT_TYPEMASK) {
>     FIXME("...");
>     return E_NOTIMPL;
> }
>
> I think over these codes again,  ~VT_TYPEMASK is equal to 0, V_VT(arg) &

~VT_TYPEMASK will always be equal to 0, and then the codes belong to this
if branch will never be executed, so why we write them?
> if(res) {
>     V_VT(res) = VT_I2;
>     V_I2(res) = V_VT(arg);
> }
>
> Jacek