[PATCH 1/3] urlmon: Added user marshaling implementation for OnDataAvailable.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
 dlls/urlmon/usrmarshal.c | 155
+++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 151 insertions(+), 4 deletions(-)

[Alexandre Julliard]

Jacek Caban <jacek(a)codeweavers.com> writes:
> +static HRESULT marshal_stgmed(STGMEDIUM *stgmed, RemSTGMEDIUM **ret)
> +{
> +    RemSTGMEDIUM *rem_stgmed;
> +    IStream *stream = NULL;
> +    ULONG size = 0;
> +    HRESULT hres;
> +
> +    if((stgmed->tymed == TYMED_ISTREAM && stgmed->u.pstm) || stgmed->pUnkForRelease) {
> +        hres = CreateStreamOnHGlobal(NULL, TRUE, &stream);
> +        if(FAILED(hres))
> +            return hres;
> +    }
> +
> +    switch(stgmed->tymed) {
> +    case TYMED_NULL:
> +        break;
> +    case TYMED_ISTREAM:
> +        if(stgmed->u.pstm)
> +            hres = CoMarshalInterface(stream, &IID_IStream, (IUnknown*)stgmed->u.pstm,
> +                                      MSHCTX_LOCAL, NULL, MSHLFLAGS_NORMAL);
> +        break;
> +    default:
> +        FIXME("unsupported tymed %u\n", stgmed->tymed);
> +        break;
> +    }
> +
> +    if(SUCCEEDED(hres) && stgmed->pUnkForRelease)
> +        hres = CoMarshalInterface(stream, &IID_IUnknown, stgmed->pUnkForRelease,
> +                                  MSHCTX_LOCAL, NULL, MSHLFLAGS_NORMAL);

This is causing a warning, and it's not clear to me what would be the
correct default value for hres.

gcc -m32 -c -o usrmarshal.o usrmarshal.c -I. -I../../include -D__WINESRC__ -D_URLMON_ -D_REENTRANT -fPIC -Wall \
  -pipe -fno-strict-aliasing -Wdeclaration-after-statement -Wempty-body -Wignored-qualifiers \
  -Wno-packed-not-aligned -Wshift-overflow=2 -Wstrict-prototypes -Wtype-limits \
  -Wunused-but-set-parameter -Wvla -Wwrite-strings -Wpointer-arith -Wlogical-op -gdwarf-2 \
  -gstrict-dwarf -fno-omit-frame-pointer -Werror -g -O2 -fno-diagnostics-show-caret
usrmarshal.c: In function ‘IBindStatusCallback_OnDataAvailable_Proxy’:
usrmarshal.c:115:7: error: ‘hres’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
usrmarshal.c:94:13: note: ‘hres’ was declared here
usrmarshal.c: At top level:
cc1: all warnings being treated as errors
Makefile:726: recipe for target 'usrmarshal.o' failed

-- 
Alexandre Julliard
julliard(a)winehq.org

[Jacek Caban]

On 13.11.2017 22:57, Alexandre Julliard wrote:
> Jacek Caban <jacek(a)codeweavers.com> writes:
> > +static HRESULT marshal_stgmed(STGMEDIUM *stgmed, RemSTGMEDIUM **ret)
> > +{
> > +    RemSTGMEDIUM *rem_stgmed;
> > +    IStream *stream = NULL;
> > +    ULONG size = 0;
> > +    HRESULT hres;
> > +
> > +    if((stgmed->tymed == TYMED_ISTREAM && stgmed->u.pstm) || stgmed->pUnkForRelease) {
> > +        hres = CreateStreamOnHGlobal(NULL, TRUE, &stream);
> > +        if(FAILED(hres))
> > +            return hres;
> > +    }
> > +
> > +    switch(stgmed->tymed) {
> > +    case TYMED_NULL:
> > +        break;
> > +    case TYMED_ISTREAM:
> > +        if(stgmed->u.pstm)
> > +            hres = CoMarshalInterface(stream, &IID_IStream, (IUnknown*)stgmed->u.pstm,
> > +                                      MSHCTX_LOCAL, NULL, MSHLFLAGS_NORMAL);
> > +        break;
> > +    default:
> > +        FIXME("unsupported tymed %u\n", stgmed->tymed);
> > +        break;
> > +    }
> > +
> > +    if(SUCCEEDED(hres) && stgmed->pUnkForRelease)
> > +        hres = CoMarshalInterface(stream, &IID_IUnknown, stgmed->pUnkForRelease,
> > +                                  MSHCTX_LOCAL, NULL, MSHLFLAGS_NORMAL);
> > This is causing a warning, and it's not clear to me what would be the
> > correct default value for hres.

Indeed, I wonder why my GCC didn't catch it. I sent a fixed version.

Thanks,
Jacek