bindctx.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

    TRACE("(%p,%s,%p)\n",This,debugstr_w(pszkey),punk);

    if (punk==NULL)
        return E_INVALIDARG;

    if (pszkey!=NULL && BindCtxImpl_GetObjectIndex(This,NULL,pszkey,&index)==S_OK)
    {
	TRACE("Overwriting existing key\n");
	if(This->bindCtxTable[index].pObj!=NULL)
	    IUnknown_Release(This->bindCtxTable[index].pObj);
	This->bindCtxTable[index].pObj=punk;
	IUnknown_AddRef(punk);
	return S_OK;
    }

    if (This->bindCtxTableLastIndex == This->bindCtxTableSize)
    {
        HRESULT hr = BindCtxImpl_ExpandTable(This);
        if (FAILED(hr))
            return hr;
    }

    This->bindCtxTable[This->bindCtxTableLastIndex].pObj = punk;
    This->bindCtxTable[This->bindCtxTableLastIndex].regType = 1;

    if (pszkey==NULL)

        This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj=NULL;

    else
    {

        This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj=
            HeapAlloc(GetProcessHeap(),0,(sizeof(WCHAR)*(1+lstrlenW(pszkey))));

        if (This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj==NULL)
            return E_OUTOFMEMORY;
        lstrcpyW(This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj,pszkey);
    }

    This->bindCtxTableLastIndex++;

    IUnknown_AddRef(punk);
    return S_OK;
}

/******************************************************************************
 *        BindCtx_GetObjectParam
 ******************************************************************************/
static HRESULT WINAPI
BindCtxImpl_GetObjectParam(IBindCtx* iface,LPOLESTR pszkey, IUnknown** punk)
{
    DWORD index;
    BindCtxImpl *This = (BindCtxImpl *)iface;

    TRACE("(%p,%s,%p)\n",This,debugstr_w(pszkey),punk);

    if (punk==NULL)
        return E_POINTER;

    *punk=0;

    if (BindCtxImpl_GetObjectIndex(This,NULL,pszkey,&index)==S_FALSE)
        return E_FAIL;

    IUnknown_AddRef(This->bindCtxTable[index].pObj);

    *punk = This->bindCtxTable[index].pObj;

    return S_OK;
}

/******************************************************************************
 *        BindCtx_RevokeObjectParam
 ******************************************************************************/
static HRESULT WINAPI
BindCtxImpl_RevokeObjectParam(IBindCtx* iface,LPOLESTR ppenum)
{
    DWORD index,j;

    BindCtxImpl *This = (BindCtxImpl *)iface;

    TRACE("(%p,%s)\n",This,debugstr_w(ppenum));

    if (BindCtxImpl_GetObjectIndex(This,NULL,ppenum,&index)==S_FALSE)
        return E_FAIL;

    /* release the object if it's found */
    if(This->bindCtxTable[index].pObj)
        IUnknown_Release(This->bindCtxTable[index].pObj);
    HeapFree(GetProcessHeap(),0,This->bindCtxTable[index].pkeyObj);
    
    /* remove the object from the table with a left-shifting of all objects in the right side */
    for(j=index; j<This->bindCtxTableLastIndex-1; j++)
        This->bindCtxTable[j]= This->bindCtxTable[j+1];

    This->bindCtxTableLastIndex--;

    return S_OK;
}

/******************************************************************************
 *        BindCtx_EnumObjectParam
 ******************************************************************************/
static HRESULT WINAPI
BindCtxImpl_EnumObjectParam(IBindCtx* iface,IEnumString** pszkey)
{
    TRACE("(%p,%p)\n",iface,pszkey);

    *pszkey = NULL;

    /* not implemented in native either */
    return E_NOTIMPL;
}

/********************************************************************************
 *        GetObjectIndex (local function)
 ********************************************************************************/
static HRESULT BindCtxImpl_GetObjectIndex(BindCtxImpl* This,
                                          IUnknown* punk,
                                          LPOLESTR pszkey,
                                          DWORD *index)
{

    DWORD i;
    BYTE found=0;

    TRACE("(%p,%p,%p,%p)\n",This,punk,pszkey,index);

    if (punk==NULL)
        /* search object identified by a register key */
        for(i=0; ( (i<This->bindCtxTableLastIndex) && (!found));i++)
        {
            if(This->bindCtxTable[i].regType==1){

                if ( ( (This->bindCtxTable[i].pkeyObj==NULL) && (pszkey==NULL) ) ||
                     ( (This->bindCtxTable[i].pkeyObj!=NULL) &&
                       (pszkey!=NULL) &&
                       (lstrcmpW(This->bindCtxTable[i].pkeyObj,pszkey)==0)
                     )
                   )

                    found=1;
            }
        }
    else
        /* search object identified by a moniker*/
        for(i=0; ( (i<This->bindCtxTableLastIndex) && (!found));i++)
            if(This->bindCtxTable[i].pObj==punk)
                found=1;

    if (index != NULL)
        *index=i-1;

    if (found)
        return S_OK;
    TRACE("key not found\n");
    return S_FALSE;
}

static HRESULT BindCtxImpl_ExpandTable(BindCtxImpl *This)
{
    if (!This->bindCtxTableSize)
    {
        This->bindCtxTableSize = BINDCTX_FIRST_TABLE_SIZE;
        This->bindCtxTable = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,
                                       This->bindCtxTableSize * sizeof(BindCtxObject));
    }
    else
    {
        This->bindCtxTableSize *= 2;

        This->bindCtxTable = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,This->bindCtxTable,
                                         This->bindCtxTableSize * sizeof(BindCtxObject));
    }

    if (!This->bindCtxTable)
        return E_OUTOFMEMORY;

    return S_OK;
}


/* Virtual function table for the BindCtx class. */
static const IBindCtxVtbl VT_BindCtxImpl =
{
    BindCtxImpl_QueryInterface,
    BindCtxImpl_AddRef,
    BindCtxImpl_Release,
    BindCtxImpl_RegisterObjectBound,
    BindCtxImpl_RevokeObjectBound,
    BindCtxImpl_ReleaseBoundObjects,
    BindCtxImpl_SetBindOptions,
    BindCtxImpl_GetBindOptions,
    BindCtxImpl_GetRunningObjectTable,
    BindCtxImpl_RegisterObjectParam,
    BindCtxImpl_GetObjectParam,
    BindCtxImpl_EnumObjectParam,
    BindCtxImpl_RevokeObjectParam
};

/******************************************************************************
 *         BindCtx_Construct (local function)
 *******************************************************************************/
static HRESULT BindCtxImpl_Construct(BindCtxImpl* This)
{
    TRACE("(%p)\n",This);

    /* Initialize the virtual function table.*/
    This->lpVtbl       = &VT_BindCtxImpl;
    This->ref          = 0;

    /* Initialize the BIND_OPTS2 structure */
    This->bindOption2.cbStruct  = sizeof(BIND_OPTS2);
    This->bindOption2.grfFlags = 0;
    This->bindOption2.grfMode = STGM_READWRITE;
    This->bindOption2.dwTickCountDeadline = 0;

    This->bindOption2.dwTrackFlags = 0;
    This->bindOption2.dwClassContext = CLSCTX_SERVER;
    This->bindOption2.locale = GetThreadLocale();
    This->bindOption2.pServerInfo = 0;

    /* Initialize the bindctx table */
    This->bindCtxTableSize=0;
    This->bindCtxTableLastIndex=0;
    This->bindCtxTable = NULL;

    return S_OK;
}

/******************************************************************************
 *        CreateBindCtx (OLE32.@)
 *
 * Creates a bind context. A bind context encompasses information and options
 * used when binding to a moniker.
 *
 * PARAMS
 *  reserved [I] Reserved. Set to 0.
 *  ppbc     [O] Address that receives the bind context object.
 *
 * RETURNS
 *  Success: S_OK.
 *  Failure: Any HRESULT code.
 */
HRESULT WINAPI CreateBindCtx(DWORD reserved, LPBC * ppbc)
{
    BindCtxImpl* newBindCtx = 0;
    HRESULT hr;
    IID riid=IID_IBindCtx;

    TRACE("(%d,%p)\n",reserved,ppbc);

    if (!ppbc) return E_INVALIDARG;

    *ppbc = NULL;

    if (reserved != 0)
    {
        ERR("reserved should be 0, not 0x%x\n", reserved);
        return E_INVALIDARG;
    }

    newBindCtx = HeapAlloc(GetProcessHeap(), 0, sizeof(BindCtxImpl));
    if (newBindCtx == 0)
        return E_OUTOFMEMORY;

    hr = BindCtxImpl_Construct(newBindCtx);
    if (FAILED(hr))
    {
        HeapFree(GetProcessHeap(),0,newBindCtx);
        return hr;
    }

    hr = BindCtxImpl_QueryInterface((IBindCtx*)newBindCtx,&riid,(void**)ppbc);

    return hr;
}

/******************************************************************************
 *              BindMoniker        [OLE32.@]
 *
 * Binds to a moniker.
 *
 * PARAMS
 *  pmk      [I] Moniker to bind to.
 *  grfOpt   [I] Reserved option flags. Set to 0.
 *  riid     [I] ID of the interface to bind to.
 *  pvResult [O] Address that receives the interface of the object that was bound to.
 *
 * RETURNS
 *  Success: S_OK.
 *  Failure: Any HRESULT code.
 */
HRESULT WINAPI BindMoniker(LPMONIKER pmk, DWORD grfOpt, REFIID riid, LPVOID * ppvResult)
{
    HRESULT res;
    IBindCtx * pbc;

    TRACE("(%p, %x, %s, %p)\n", pmk, grfOpt, debugstr_guid(riid), ppvResult);

    res = CreateBindCtx(grfOpt, &pbc);
    if (SUCCEEDED(res))
        res = IMoniker_BindToObject(pmk, pbc, NULL, riid, ppvResult);
    return res;
}