propidl.idl File Reference

Go to the source code of this file.

Classes
interface	IPropertyStorage
struct	IPropertyStorage::tagPROPVARIANT
struct	IPropertyStorage::tagPROPSPEC
struct	IPropertyStorage::tagSTATPROPSTG
struct	IPropertyStorage::tagSTATPROPSETSTG
interface	IPropertySetStorage
interface	IEnumSTATPROPSTG
interface	struct

Macros
#define	TYPEDEF_CA(type, name)

Functions
HRESULT WINAPI	FreePropVariantArray (ULONG, PROPVARIANT *)
HRESULT WINAPI	PropVariantClear (PROPVARIANT *)
HRESULT WINAPI	PropVariantCopy (PROPVARIANT *, const PROPVARIANT *)
HRESULT WINAPI	StgCreatePropStg (IUnknown *, REFFMTID, const CLSID *, DWORD, DWORD, IPropertyStorage **)
HRESULT WINAPI	StgOpenPropStg (IUnknown *, REFFMTID, DWORD, DWORD, IPropertyStorage **)
HRESULT WINAPI	StgCreatePropSetStg (IStorage *, DWORD, IPropertySetStorage **)
HRESULT WINAPI	FmtIdToPropStgName (const FMTID *, LPOLESTR)
HRESULT WINAPI	PropStgNameToFmtId (const LPOLESTR, FMTID *)

Variables
BYTE	rgb [1]
	SERIALIZEDPROPERTYVALUE

Macro Definition Documentation

TYPEDEF_CA

#define TYPEDEF_CA	(		type,
			name
	)

Value:

    typedef struct tag##name { \
      ULONG cElems; \
      [size_is(cElems)] \
      type *pElems; \
    } name

Definition at line 81 of file propidl.idl.

Function Documentation

FmtIdToPropStgName()

HRESULT WINAPI FmtIdToPropStgName	(	const FMTID *	rfmtid,
		LPOLESTR	str
	)

Definition at line 72 of file stg_prop.c.

{
    static const char fmtMap[] = "abcdefghijklmnopqrstuvwxyz012345";
 
    TRACE("%s, %p\n", debugstr_guid(rfmtid), str);
 
    if (!rfmtid) return E_INVALIDARG;
    if (!str) return E_INVALIDARG;
 
    if (IsEqualGUID(&FMTID_SummaryInformation, rfmtid))
        lstrcpyW(str, szSummaryInfo);
    else if (IsEqualGUID(&FMTID_DocSummaryInformation, rfmtid))
        lstrcpyW(str, szDocSummaryInfo);
    else if (IsEqualGUID(&FMTID_UserDefinedProperties, rfmtid))
        lstrcpyW(str, szDocSummaryInfo);
    else
    {
        const BYTE *fmtptr;
        WCHAR *pstr = str;
        ULONG bitsRemaining = BITS_PER_BYTE;
 
        *pstr++ = 5;
        for (fmtptr = (const BYTE *)rfmtid; fmtptr < (const BYTE *)rfmtid + sizeof(FMTID); )
        {
            ULONG i = *fmtptr >> (BITS_PER_BYTE - bitsRemaining);
 
            if (bitsRemaining >= BITS_IN_CHARMASK)
            {
                *pstr = (WCHAR)(fmtMap[i & CHARMASK]);
                if (bitsRemaining == BITS_PER_BYTE && *pstr >= 'a' &&
                 *pstr <= 'z')
                    *pstr += 'A' - 'a';
                pstr++;
                bitsRemaining -= BITS_IN_CHARMASK;
                if (bitsRemaining == 0)
                {
                    fmtptr++;
                    bitsRemaining = BITS_PER_BYTE;
                }
            }
            else
            {
                if (++fmtptr < (const BYTE *)rfmtid + sizeof(FMTID))
                    i |= *fmtptr << bitsRemaining;
                *pstr++ = (WCHAR)(fmtMap[i & CHARMASK]);
                bitsRemaining += BITS_PER_BYTE - BITS_IN_CHARMASK;
            }
        }
        *pstr = 0;
    }
    TRACE("returning %s\n", debugstr_w(str));
    return S_OK;
}

Referenced by IPropertySetStorage_fnCreate(), IPropertySetStorage_fnDelete(), IPropertySetStorage_fnOpen(), and testFmtId().

FreePropVariantArray()

HRESULT WINAPI FreePropVariantArray	(	ULONG	count,
		PROPVARIANT *	rgvars
	)

Definition at line 601 of file combase.c.

{
    ULONG i;
 
    TRACE("%lu, %p.\n", count, rgvars);
 
    if (!rgvars)
        return E_INVALIDARG;
 
    for (i = 0; i < count; ++i)
        PropVariantClear(&rgvars[i]);
 
    return S_OK;
}

Referenced by PropVariantClear().

PropStgNameToFmtId()

HRESULT WINAPI PropStgNameToFmtId	(	const	LPOLESTR,
		FMTID *	rfmtid
	)

Definition at line 129 of file stg_prop.c.

{
    HRESULT hr = STG_E_INVALIDNAME;
 
    TRACE("%s, %p\n", debugstr_w(str), rfmtid);
 
    if (!rfmtid) return E_INVALIDARG;
    if (!str) return STG_E_INVALIDNAME;
 
    if (!lstrcmpiW(str, szDocSummaryInfo))
    {
        *rfmtid = FMTID_DocSummaryInformation;
        hr = S_OK;
    }
    else if (!lstrcmpiW(str, szSummaryInfo))
    {
        *rfmtid = FMTID_SummaryInformation;
        hr = S_OK;
    }
    else
    {
        ULONG bits;
        BYTE *fmtptr = (BYTE *)rfmtid - 1;
        const WCHAR *pstr = str;
 
        memset(rfmtid, 0, sizeof(*rfmtid));
        for (bits = 0; bits < sizeof(FMTID) * BITS_PER_BYTE;
         bits += BITS_IN_CHARMASK)
        {
            ULONG bitsUsed = bits % BITS_PER_BYTE, bitsStored;
            WCHAR wc;
 
            if (bitsUsed == 0)
                fmtptr++;
            wc = *++pstr - 'A';
            if (wc > NUM_ALPHA_CHARS)
            {
                wc += 'A' - 'a';
                if (wc > NUM_ALPHA_CHARS)
                {
                    wc += 'a' - '0' + NUM_ALPHA_CHARS;
                    if (wc > CHARMASK)
                    {
                        WARN("invalid character (%d)\n", *pstr);
                        goto end;
                    }
                }
            }
            *fmtptr |= wc << bitsUsed;
            bitsStored = min(BITS_PER_BYTE - bitsUsed, BITS_IN_CHARMASK);
            if (bitsStored < BITS_IN_CHARMASK)
            {
                wc >>= BITS_PER_BYTE - bitsUsed;
                if (bits + bitsStored == sizeof(FMTID) * BITS_PER_BYTE)
                {
                    if (wc != 0)
                    {
                        WARN("extra bits\n");
                        goto end;
                    }
                    break;
                }
                fmtptr++;
                *fmtptr |= (BYTE)wc;
            }
        }
        hr = S_OK;
    }
end:
    return hr;
}

Referenced by create_enum_stat_propset_stg(), and testFmtId().

PropVariantClear()

HRESULT WINAPI PropVariantClear

(

PROPVARIANT *

pvar

)

Definition at line 709 of file combase.c.

{
    HRESULT hr;
 
    TRACE("%p.\n", pvar);
 
    if (!pvar)
        return S_OK;
 
    hr = propvar_validatetype(pvar->vt);
    if (FAILED(hr))
    {
        memset(pvar, 0, sizeof(*pvar));
        return hr;
    }
 
    switch (pvar->vt)
    {
    case VT_EMPTY:
    case VT_NULL:
    case VT_I1:
    case VT_I2:
    case VT_I4:
    case VT_I8:
    case VT_R4:
    case VT_R8:
    case VT_CY:
    case VT_DATE:
    case VT_ERROR:
    case VT_BOOL:
    case VT_DECIMAL:
    case VT_UI1:
    case VT_UI2:
    case VT_UI4:
    case VT_UI8:
    case VT_INT:
    case VT_UINT:
    case VT_FILETIME:
        break;
    case VT_DISPATCH:
    case VT_UNKNOWN:
    case VT_STREAM:
    case VT_STREAMED_OBJECT:
    case VT_STORAGE:
    case VT_STORED_OBJECT:
        if (pvar->pStream)
            IStream_Release(pvar->pStream);
        break;
    case VT_CLSID:
    case VT_LPSTR:
    case VT_LPWSTR:
        /* pick an arbitrary typed pointer - we don't care about the type
         * as we are just freeing it */
        CoTaskMemFree(pvar->puuid);
        break;
    case VT_BLOB:
    case VT_BLOB_OBJECT:
        CoTaskMemFree(pvar->blob.pBlobData);
        break;
    case VT_BSTR:
        SysFreeString(pvar->bstrVal);
        break;
    case VT_CF:
        if (pvar->pclipdata)
        {
            propvar_free_cf_array(1, pvar->pclipdata);
            CoTaskMemFree(pvar->pclipdata);
        }
        break;
    default:
        if (pvar->vt & VT_VECTOR)
        {
            ULONG i;
 
            switch (pvar->vt & ~VT_VECTOR)
            {
            case VT_VARIANT:
                FreePropVariantArray(pvar->capropvar.cElems, pvar->capropvar.pElems);
                break;
            case VT_CF:
                propvar_free_cf_array(pvar->caclipdata.cElems, pvar->caclipdata.pElems);
                break;
            case VT_BSTR:
                for (i = 0; i < pvar->cabstr.cElems; i++)
                    SysFreeString(pvar->cabstr.pElems[i]);
                break;
            case VT_LPSTR:
                for (i = 0; i < pvar->calpstr.cElems; i++)
                    CoTaskMemFree(pvar->calpstr.pElems[i]);
                break;
            case VT_LPWSTR:
                for (i = 0; i < pvar->calpwstr.cElems; i++)
                    CoTaskMemFree(pvar->calpwstr.pElems[i]);
                break;
            }
            if (pvar->vt & ~VT_VECTOR)
            {
                /* pick an arbitrary VT_VECTOR structure - they all have the same
                 * memory layout */
                CoTaskMemFree(pvar->capropvar.pElems);
            }
        }
        else if (pvar->vt & VT_ARRAY)
            hr = SafeArrayDestroy(pvar->parray);
        else
        {
            WARN("Invalid/unsupported type %d\n", pvar->vt);
            hr = STG_E_INVALIDPARAMETER;
        }
    }
 
    memset(pvar, 0, sizeof(*pvar));
    return hr;
}

Referenced by check_tiff_format(), compare_metadata(), destroy_format(), free_header(), FreePropVariantArray(), GdipGetAllPropertyItems(), GdipGetPropertyItem(), GdipGetPropertyItemSize(), GdipGetPropertySize(), get_bool_property(), get_next_reader(), get_property(), get_token(), get_ulong_by_index(), InitPropVariantFromStringVector(), MetadataHandler_FreeItems(), MimeBody_GetProp(), MMDevice_Create(), MMDevice_GetPropValue(), mqr_GetMetadataByName(), on_mime_message_available(), PersistFile_Save(), png_metadata_reader(), PropertyStorage_PropertyDestroy(), PropertyStorage_ReadFromStream(), PropertyStorage_StorePropWithId(), PropertyStore_SetValue(), PropertyStore_SetValueAndState(), PropVariantCompareEx(), set_driver_prop_value(), test_BodyDeleteProp(), test_convert(), test_copy(), test_CreateMessage(), test_CreateMetadataWriterFromReader(), test_deviceinterface(), test_first_device(), test_ifd_content(), test_InitPropVariantFromBuffer(), test_InitPropVariantFromCLSID(), test_InitPropVariantFromStringVector(), test_intconversions(), test_MessageGetPropInfo(), test_MessageOptions(), test_MessageSetProp(), test_metadata_APE(), test_metadata_App1(), test_metadata_cHRM(), test_metadata_gAMA(), test_metadata_gif(), test_metadata_GIF_comment(), test_metadata_hIST(), test_metadata_tEXt(), test_metadata_unknown(), test_propertystore(), test_propertytovariant(), test_PropVariantChangeType_LPWSTR(), test_PropVariantToBSTR(), test_PropVariantToBuffer(), test_PropVariantToDouble(), test_PropVariantToGUID(), test_PropVariantToString(), test_PropVariantToStringAlloc(), test_PropVariantToVariant(), test_queryreader(), test_validtypes(), test_VariantToPropVariant(), testCodepage(), and testPropsHelper().

PropVariantCopy()

HRESULT WINAPI PropVariantCopy	(	PROPVARIANT *	pvarDest,
		const PROPVARIANT *	pvarSrc
	)

Definition at line 827 of file combase.c.

{
    ULONG len;
    HRESULT hr;
 
    TRACE("%p, %p vt %04x.\n", pvarDest, pvarSrc, pvarSrc->vt);
 
    hr = propvar_validatetype(pvarSrc->vt);
    if (FAILED(hr))
        return DISP_E_BADVARTYPE;
 
    /* this will deal with most cases */
    *pvarDest = *pvarSrc;
 
    switch (pvarSrc->vt)
    {
    case VT_EMPTY:
    case VT_NULL:
    case VT_I1:
    case VT_UI1:
    case VT_I2:
    case VT_UI2:
    case VT_BOOL:
    case VT_DECIMAL:
    case VT_I4:
    case VT_UI4:
    case VT_R4:
    case VT_ERROR:
    case VT_I8:
    case VT_UI8:
    case VT_INT:
    case VT_UINT:
    case VT_R8:
    case VT_CY:
    case VT_DATE:
    case VT_FILETIME:
        break;
    case VT_DISPATCH:
    case VT_UNKNOWN:
    case VT_STREAM:
    case VT_STREAMED_OBJECT:
    case VT_STORAGE:
    case VT_STORED_OBJECT:
        if (pvarDest->pStream)
            IStream_AddRef(pvarDest->pStream);
        break;
    case VT_CLSID:
        pvarDest->puuid = CoTaskMemAlloc(sizeof(CLSID));
        *pvarDest->puuid = *pvarSrc->puuid;
        break;
    case VT_LPSTR:
        if (pvarSrc->pszVal)
        {
            len = strlen(pvarSrc->pszVal);
            pvarDest->pszVal = CoTaskMemAlloc((len+1)*sizeof(CHAR));
            CopyMemory(pvarDest->pszVal, pvarSrc->pszVal, (len+1)*sizeof(CHAR));
        }
        break;
    case VT_LPWSTR:
        if (pvarSrc->pwszVal)
        {
            len = lstrlenW(pvarSrc->pwszVal);
            pvarDest->pwszVal = CoTaskMemAlloc((len+1)*sizeof(WCHAR));
            CopyMemory(pvarDest->pwszVal, pvarSrc->pwszVal, (len+1)*sizeof(WCHAR));
        }
        break;
    case VT_BLOB:
    case VT_BLOB_OBJECT:
        if (pvarSrc->blob.pBlobData)
        {
            len = pvarSrc->blob.cbSize;
            pvarDest->blob.pBlobData = CoTaskMemAlloc(len);
            CopyMemory(pvarDest->blob.pBlobData, pvarSrc->blob.pBlobData, len);
        }
        break;
    case VT_BSTR:
        pvarDest->bstrVal = SysAllocString(pvarSrc->bstrVal);
        break;
    case VT_CF:
        if (pvarSrc->pclipdata)
        {
            len = pvarSrc->pclipdata->cbSize - sizeof(pvarSrc->pclipdata->ulClipFmt);
            pvarDest->pclipdata = CoTaskMemAlloc(sizeof (CLIPDATA));
            pvarDest->pclipdata->cbSize = pvarSrc->pclipdata->cbSize;
            pvarDest->pclipdata->ulClipFmt = pvarSrc->pclipdata->ulClipFmt;
            pvarDest->pclipdata->pClipData = CoTaskMemAlloc(len);
            CopyMemory(pvarDest->pclipdata->pClipData, pvarSrc->pclipdata->pClipData, len);
        }
        break;
    default:
        if (pvarSrc->vt & VT_VECTOR)
        {
            int elemSize;
            ULONG i;
 
            switch (pvarSrc->vt & ~VT_VECTOR)
            {
            case VT_I1:       elemSize = sizeof(pvarSrc->cVal); break;
            case VT_UI1:      elemSize = sizeof(pvarSrc->bVal); break;
            case VT_I2:       elemSize = sizeof(pvarSrc->iVal); break;
            case VT_UI2:      elemSize = sizeof(pvarSrc->uiVal); break;
            case VT_BOOL:     elemSize = sizeof(pvarSrc->boolVal); break;
            case VT_I4:       elemSize = sizeof(pvarSrc->lVal); break;
            case VT_UI4:      elemSize = sizeof(pvarSrc->ulVal); break;
            case VT_R4:       elemSize = sizeof(pvarSrc->fltVal); break;
            case VT_R8:       elemSize = sizeof(pvarSrc->dblVal); break;
            case VT_ERROR:    elemSize = sizeof(pvarSrc->scode); break;
            case VT_I8:       elemSize = sizeof(pvarSrc->hVal); break;
            case VT_UI8:      elemSize = sizeof(pvarSrc->uhVal); break;
            case VT_CY:       elemSize = sizeof(pvarSrc->cyVal); break;
            case VT_DATE:     elemSize = sizeof(pvarSrc->date); break;
            case VT_FILETIME: elemSize = sizeof(pvarSrc->filetime); break;
            case VT_CLSID:    elemSize = sizeof(*pvarSrc->puuid); break;
            case VT_CF:       elemSize = sizeof(*pvarSrc->pclipdata); break;
            case VT_BSTR:     elemSize = sizeof(pvarSrc->bstrVal); break;
            case VT_LPSTR:    elemSize = sizeof(pvarSrc->pszVal); break;
            case VT_LPWSTR:   elemSize = sizeof(pvarSrc->pwszVal); break;
            case VT_VARIANT:  elemSize = sizeof(*pvarSrc->pvarVal); break;
 
            default:
                FIXME("Invalid element type: %ul\n", pvarSrc->vt & ~VT_VECTOR);
                return E_INVALIDARG;
            }
            len = pvarSrc->capropvar.cElems;
            pvarDest->capropvar.pElems = len ? CoTaskMemAlloc(len * elemSize) : NULL;
            if (pvarSrc->vt == (VT_VECTOR | VT_VARIANT))
            {
                for (i = 0; i < len; i++)
                    PropVariantCopy(&pvarDest->capropvar.pElems[i], &pvarSrc->capropvar.pElems[i]);
            }
            else if (pvarSrc->vt == (VT_VECTOR | VT_CF))
            {
                FIXME("Copy clipformats\n");
            }
            else if (pvarSrc->vt == (VT_VECTOR | VT_BSTR))
            {
                for (i = 0; i < len; i++)
                    pvarDest->cabstr.pElems[i] = SysAllocString(pvarSrc->cabstr.pElems[i]);
            }
            else if (pvarSrc->vt == (VT_VECTOR | VT_LPSTR))
            {
                size_t strLen;
                for (i = 0; i < len; i++)
                {
                    strLen = lstrlenA(pvarSrc->calpstr.pElems[i]) + 1;
                    pvarDest->calpstr.pElems[i] = CoTaskMemAlloc(strLen);
                    memcpy(pvarDest->calpstr.pElems[i],
                     pvarSrc->calpstr.pElems[i], strLen);
                }
            }
            else if (pvarSrc->vt == (VT_VECTOR | VT_LPWSTR))
            {
                size_t strLen;
                for (i = 0; i < len; i++)
                {
                    strLen = (lstrlenW(pvarSrc->calpwstr.pElems[i]) + 1) *
                     sizeof(WCHAR);
                    pvarDest->calpstr.pElems[i] = CoTaskMemAlloc(strLen);
                    memcpy(pvarDest->calpstr.pElems[i],
                     pvarSrc->calpstr.pElems[i], strLen);
                }
            }
            else
                CopyMemory(pvarDest->capropvar.pElems, pvarSrc->capropvar.pElems, len * elemSize);
        }
        else if (pvarSrc->vt & VT_ARRAY)
        {
            pvarDest->uhVal.QuadPart = 0;
            return SafeArrayCopy(pvarSrc->parray, &pvarDest->parray);
        }
        else
            WARN("Invalid/unsupported type %d\n", pvarSrc->vt);
    }
 
    return S_OK;
}

Referenced by IPropertyStorage_fnWriteMultiple(), MetadataHandler_GetValue(), MetadataHandler_GetValueByIndex(), MetadataHandlerEnum_Next(), MimeBody_SetProp(), PropertyStorage_PropVariantCopy(), PropertyStore_GetValue(), PropertyStore_GetValueAndState(), PropertyStore_SetValue(), PropertyStore_SetValueAndState(), PropVariantChangeType(), PropVariantCopy(), test_copy(), and test_validtypes().

StgCreatePropSetStg()

HRESULT WINAPI StgCreatePropSetStg	(	IStorage *	pstg,
		DWORD	reserved,
		IPropertySetStorage **	propset
	)

Definition at line 233 of file storage32.c.

{
    TRACE("%p, %#lx, %p.\n", pstg, reserved, propset);
    if (reserved)
        return STG_E_INVALIDPARAMETER;
 
    return IStorage_QueryInterface(pstg, &IID_IPropertySetStorage, (void**)propset);
}

Referenced by test_propertyset_storage_enum(), testCodepage(), and testPropsHelper().

StgCreatePropStg()

HRESULT WINAPI StgCreatePropStg	(	IUnknown *	unk,
		REFFMTID	fmt,
		const CLSID *	clsid,
		DWORD	flags,
		DWORD	reserved,
		IPropertyStorage **	prop_stg
	)

Definition at line 3059 of file stg_prop.c.

{
    IStorage *stg;
    IStream *stm;
    HRESULT r;
 
    TRACE("%p, %s, %s, %#lx, %ld, %p.\n", unk, debugstr_guid(fmt), debugstr_guid(clsid), flags, reserved, prop_stg);
 
    if (!fmt || reserved)
    {
        r = E_INVALIDARG;
        goto end;
    }
 
    if (flags & PROPSETFLAG_NONSIMPLE)
    {
        r = IUnknown_QueryInterface(unk, &IID_IStorage, (void **)&stg);
        if (FAILED(r))
            goto end;
 
        /* FIXME: if (flags & PROPSETFLAG_NONSIMPLE), we need to create a
         * storage, not a stream.  For now, disallow it.
         */
        FIXME("PROPSETFLAG_NONSIMPLE not supported\n");
        IStorage_Release(stg);
        r = STG_E_INVALIDFLAG;
    }
    else
    {
        r = IUnknown_QueryInterface(unk, &IID_IStream, (void **)&stm);
        if (FAILED(r))
            goto end;
 
        r = PropertyStorage_ConstructEmpty(stm, fmt, flags,
                STGM_CREATE|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, prop_stg);
 
        IStream_Release( stm );
    }
 
end:
    TRACE("returning %#lx\n", r);
    return r;
}

Referenced by testPropsHelper().

StgOpenPropStg()

HRESULT WINAPI StgOpenPropStg	(	IUnknown *	unk,
		REFFMTID	fmt,
		DWORD	flags,
		DWORD	reserved,
		IPropertyStorage **	prop_stg
	)

Definition at line 3104 of file stg_prop.c.

{
    IStorage *stg;
    IStream *stm;
    HRESULT r;
 
    TRACE("%p, %s, %#lx, %ld, %p.\n", unk, debugstr_guid(fmt), flags, reserved, prop_stg);
 
    if (!fmt || reserved)
    {
        r = E_INVALIDARG;
        goto end;
    }
 
    if (flags & PROPSETFLAG_NONSIMPLE)
    {
        r = IUnknown_QueryInterface(unk, &IID_IStorage, (void **)&stg);
        if (FAILED(r))
            goto end;
 
        /* FIXME: if (flags & PROPSETFLAG_NONSIMPLE), we need to open a
         * storage, not a stream.  For now, disallow it.
         */
        FIXME("PROPSETFLAG_NONSIMPLE not supported\n");
        IStorage_Release(stg);
        r = STG_E_INVALIDFLAG;
    }
    else
    {
        r = IUnknown_QueryInterface(unk, &IID_IStream, (void **)&stm);
        if (FAILED(r))
            goto end;
 
        r = PropertyStorage_ConstructFromStream(stm, fmt,
                STGM_READWRITE|STGM_SHARE_EXCLUSIVE, prop_stg);
 
        IStream_Release( stm );
    }
 
end:
    TRACE("returning %#lx\n", r);
    return r;
}

Referenced by testPropsHelper().

Variable Documentation

rgb

BYTE rgb[1]

Definition at line 440 of file propidl.idl.

SERIALIZEDPROPERTYVALUE

SERIALIZEDPROPERTYVALUE

Definition at line 441 of file propidl.idl.

Referenced by test_propertytovariant(), and test_varianttoproperty().