dlls/ole32/oleobj.c

   1 /*
   2  *      OLE2 COM objects
   3  *
   4  *      Copyright 1998 Eric Kohl
   5  *      Copyright 1999 Francis Beaudet
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22
  23 #include <string.h>
  24 #include "winbase.h"
  25 #include "winerror.h"
  26 #include "wine/debug.h"
  27 #include "oleidl.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  30
  31 #define INITIAL_SINKS 10
  32
  33 /**************************************************************************
  34  *  OleAdviseHolderImpl Implementation
  35  */
  36 typedef struct OleAdviseHolderImpl
  37 {
  38   ICOM_VFIELD(IOleAdviseHolder);
  39
  40   DWORD ref;
  41
  42   DWORD         maxSinks;
  43   IAdviseSink** arrayOfSinks;
  44
  45 } OleAdviseHolderImpl;
  46
  47 static LPOLEADVISEHOLDER OleAdviseHolderImpl_Constructor();
  48 static void              OleAdviseHolderImpl_Destructor(OleAdviseHolderImpl* ptrToDestroy);
  49 static HRESULT WINAPI    OleAdviseHolderImpl_QueryInterface(LPOLEADVISEHOLDER,REFIID,LPVOID*);
  50 static ULONG WINAPI      OleAdviseHolderImpl_AddRef(LPOLEADVISEHOLDER);
  51 static ULONG WINAPI      OleAdviseHolderImpl_Release(LPOLEADVISEHOLDER);
  52 static HRESULT WINAPI    OleAdviseHolderImpl_Advise(LPOLEADVISEHOLDER, IAdviseSink*, DWORD*);
  53 static HRESULT WINAPI    OleAdviseHolderImpl_Unadvise (LPOLEADVISEHOLDER, DWORD);
  54 static HRESULT WINAPI    OleAdviseHolderImpl_EnumAdvise (LPOLEADVISEHOLDER, IEnumSTATDATA **);
  55 static HRESULT WINAPI    OleAdviseHolderImpl_SendOnRename (LPOLEADVISEHOLDER, IMoniker *);
  56 static HRESULT WINAPI    OleAdviseHolderImpl_SendOnSave (LPOLEADVISEHOLDER);
  57 static HRESULT WINAPI    OleAdviseHolderImpl_SendOnClose (LPOLEADVISEHOLDER);
  58
  59
  60 /**************************************************************************
  61  *  OleAdviseHolderImpl_VTable
  62  */
  63 static struct ICOM_VTABLE(IOleAdviseHolder) oahvt =
  64 {
  65     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  66     OleAdviseHolderImpl_QueryInterface,
  67     OleAdviseHolderImpl_AddRef,
  68     OleAdviseHolderImpl_Release,
  69     OleAdviseHolderImpl_Advise,
  70     OleAdviseHolderImpl_Unadvise,
  71     OleAdviseHolderImpl_EnumAdvise,
  72     OleAdviseHolderImpl_SendOnRename,
  73     OleAdviseHolderImpl_SendOnSave,
  74     OleAdviseHolderImpl_SendOnClose
  75 };
  76
  77 /**************************************************************************
  78  *  OleAdviseHolderImpl_Constructor
  79  */
  80
  81 static LPOLEADVISEHOLDER OleAdviseHolderImpl_Constructor()
  82 {
  83   OleAdviseHolderImpl* lpoah;
  84   DWORD                index;
  85
  86   lpoah= (OleAdviseHolderImpl*)HeapAlloc(GetProcessHeap(),
  87                                          0,
  88                                          sizeof(OleAdviseHolderImpl));
  89
  90   ICOM_VTBL(lpoah) = &oahvt;
  91   lpoah->ref = 1;
  92   lpoah->maxSinks = INITIAL_SINKS;
  93   lpoah->arrayOfSinks = HeapAlloc(GetProcessHeap(),
  94                                   0,
  95                                   lpoah->maxSinks * sizeof(IAdviseSink*));
  96
  97   for (index = 0; index < lpoah->maxSinks; index++)
  98     lpoah->arrayOfSinks[index]=0;
  99
 100   TRACE("returning %p\n", lpoah);
 101   return (LPOLEADVISEHOLDER)lpoah;
 102 }
 103
 104 /**************************************************************************
 105  *  OleAdviseHolderImpl_Destructor
 106  */
 107 static void OleAdviseHolderImpl_Destructor(
 108   OleAdviseHolderImpl* ptrToDestroy)
 109 {
 110   DWORD index;
 111   TRACE("%p\n", ptrToDestroy);
 112
 113   for (index = 0; index < ptrToDestroy->maxSinks; index++)
 114   {
 115     if (ptrToDestroy->arrayOfSinks[index]!=0)
 116     {
 117       IAdviseSink_Release(ptrToDestroy->arrayOfSinks[index]);
 118       ptrToDestroy->arrayOfSinks[index] = NULL;
 119     }
 120   }
 121
 122   HeapFree(GetProcessHeap(),
 123            0,
 124            ptrToDestroy->arrayOfSinks);
 125
 126
 127   HeapFree(GetProcessHeap(),
 128            0,
 129            ptrToDestroy);
 130 }
 131
 132 /**************************************************************************
 133  *  OleAdviseHolderImpl_QueryInterface
 134  */
 135 static HRESULT WINAPI OleAdviseHolderImpl_QueryInterface(
 136   LPOLEADVISEHOLDER iface,
 137   REFIID            riid,
 138   LPVOID*           ppvObj)
 139 {
 140   ICOM_THIS(OleAdviseHolderImpl, iface);
 141   TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 142   /*
 143    * Sanity check
 144    */
 145   if (ppvObj==NULL)
 146     return E_POINTER;
 147
 148   *ppvObj = NULL;
 149
 150   if (IsEqualIID(riid, &IID_IUnknown))
 151   {
 152     /* IUnknown */
 153     *ppvObj = This;
 154   }
 155   else if(IsEqualIID(riid, &IID_IOleAdviseHolder))
 156   {
 157     /* IOleAdviseHolder */
 158     *ppvObj = (IOleAdviseHolder*) This;
 159   }
 160
 161   if(*ppvObj == NULL)
 162     return E_NOINTERFACE;
 163
 164   /*
 165    * A successful QI always increments the reference count.
 166    */
 167   IUnknown_AddRef((IUnknown*)*ppvObj);
 168
 169   return S_OK;
 170 }
 171
 172 /******************************************************************************
 173  * OleAdviseHolderImpl_AddRef
 174  */
 175 static ULONG WINAPI OleAdviseHolderImpl_AddRef(
 176   LPOLEADVISEHOLDER iface)
 177 {
 178   ICOM_THIS(OleAdviseHolderImpl, iface);
 179   TRACE("(%p)->(ref=%ld)\n", This, This->ref);
 180   return ++(This->ref);
 181 }
 182
 183 /******************************************************************************
 184  * OleAdviseHolderImpl_Release
 185  */
 186 static ULONG WINAPI OleAdviseHolderImpl_Release(
 187   LPOLEADVISEHOLDER iface)
 188 {
 189   ICOM_THIS(OleAdviseHolderImpl, iface);
 190   TRACE("(%p)->(ref=%ld)\n", This, This->ref);
 191   This->ref--;
 192
 193   if (This->ref == 0)
 194   {
 195     OleAdviseHolderImpl_Destructor(This);
 196
 197     return 0;
 198   }
 199
 200   return This->ref;
 201 }
 202
 203 /******************************************************************************
 204  * OleAdviseHolderImpl_Advise
 205  */
 206 static HRESULT WINAPI OleAdviseHolderImpl_Advise(
 207   LPOLEADVISEHOLDER iface,
 208   IAdviseSink*      pAdvise,
 209   DWORD*            pdwConnection)
 210 {
 211   DWORD index;
 212
 213   ICOM_THIS(OleAdviseHolderImpl, iface);
 214
 215   TRACE("(%p)->(%p, %p)\n", This, pAdvise, pdwConnection);
 216
 217   /*
 218    * Sanity check
 219    */
 220   if (pdwConnection==NULL)
 221     return E_POINTER;
 222
 223   *pdwConnection = 0;
 224
 225   /*
 226    * Find a free spot in the array.
 227    */
 228   for (index = 0; index < This->maxSinks; index++)
 229   {
 230     if (This->arrayOfSinks[index]==NULL)
 231       break;
 232   }
 233
 234   /*
 235    * If the array is full, we need to grow it.
 236    */
 237   if (index == This->maxSinks)
 238   {
 239     DWORD i;
 240
 241     This->maxSinks+=INITIAL_SINKS;
 242
 243     This->arrayOfSinks = HeapReAlloc(GetProcessHeap(),
 244                                      0,
 245                                      This->arrayOfSinks,
 246                                      This->maxSinks*sizeof(IAdviseSink*));
 247
 248     for (i=index;i < This->maxSinks; i++)
 249       This->arrayOfSinks[i]=0;
 250   }
 251
 252   /*
 253    * Store the new sink
 254    */
 255   This->arrayOfSinks[index] = pAdvise;
 256
 257   if (This->arrayOfSinks[index]!=NULL)
 258     IAdviseSink_AddRef(This->arrayOfSinks[index]);
 259
 260   /*
 261    * Return the index as the cookie.
 262    * Since 0 is not a valid cookie, we will increment by
 263    * 1 the index in the table.
 264    */
 265   *pdwConnection = index+1;
 266
 267   return S_OK;
 268 }
 269
 270 /******************************************************************************
 271  * OleAdviseHolderImpl_Unadvise
 272  */
 273 static HRESULT WINAPI OleAdviseHolderImpl_Unadvise(
 274   LPOLEADVISEHOLDER iface,
 275   DWORD             dwConnection)
 276 {
 277   ICOM_THIS(OleAdviseHolderImpl, iface);
 278
 279   TRACE("(%p)->(%lu)\n", This, dwConnection);
 280
 281   /*
 282    * So we don't return 0 as a cookie, the index was
 283    * incremented by 1 in OleAdviseHolderImpl_Advise
 284    * we have to compensate.
 285    */
 286   dwConnection--;
 287
 288   /*
 289    * Check for invalid cookies.
 290    */
 291   if ( (dwConnection < 0) ||
 292        (dwConnection >= This->maxSinks) )
 293     return OLE_E_NOCONNECTION;
 294
 295   if (This->arrayOfSinks[dwConnection] == NULL)
 296     return OLE_E_NOCONNECTION;
 297
 298   /*
 299    * Release the sink and mark the spot in the list as free.
 300    */
 301   IAdviseSink_Release(This->arrayOfSinks[dwConnection]);
 302   This->arrayOfSinks[dwConnection] = NULL;
 303
 304   return S_OK;
 305 }
 306
 307 /******************************************************************************
 308  * OleAdviseHolderImpl_EnumAdvise
 309  */
 310 static HRESULT WINAPI
 311 OleAdviseHolderImpl_EnumAdvise (LPOLEADVISEHOLDER iface, IEnumSTATDATA **ppenumAdvise)
 312 {
 313     ICOM_THIS(OleAdviseHolderImpl, iface);
 314     FIXME("(%p)->(%p)\n", This, ppenumAdvise);
 315
 316     *ppenumAdvise = NULL;
 317
 318     return S_OK;
 319 }
 320
 321 /******************************************************************************
 322  * OleAdviseHolderImpl_SendOnRename
 323  */
 324 static HRESULT WINAPI
 325 OleAdviseHolderImpl_SendOnRename (LPOLEADVISEHOLDER iface, IMoniker *pmk)
 326 {
 327     ICOM_THIS(OleAdviseHolderImpl, iface);
 328     FIXME("(%p)->(%p)\n", This, pmk);
 329
 330
 331     return S_OK;
 332 }
 333
 334 /******************************************************************************
 335  * OleAdviseHolderImpl_SendOnSave
 336  */
 337 static HRESULT WINAPI
 338 OleAdviseHolderImpl_SendOnSave (LPOLEADVISEHOLDER iface)
 339 {
 340     ICOM_THIS(OleAdviseHolderImpl, iface);
 341     FIXME("(%p)\n", This);
 342
 343     return S_OK;
 344 }
 345
 346 /******************************************************************************
 347  * OleAdviseHolderImpl_SendOnClose
 348  */
 349 static HRESULT WINAPI
 350 OleAdviseHolderImpl_SendOnClose (LPOLEADVISEHOLDER iface)
 351 {
 352     ICOM_THIS(OleAdviseHolderImpl, iface);
 353     FIXME("(%p)\n", This);
 354
 355
 356     return S_OK;
 357 }
 358
 359 /**************************************************************************
 360  *  DataAdviseHolder Implementation
 361  */
 362 typedef struct DataAdviseConnection {
 363   IAdviseSink *sink;
 364   FORMATETC fmat;
 365   DWORD advf;
 366 } DataAdviseConnection;
 367
 368 typedef struct DataAdviseHolder
 369 {
 370   ICOM_VFIELD(IDataAdviseHolder);
 371
 372   DWORD                 ref;
 373   DWORD                 maxCons;
 374   DataAdviseConnection* Connections;
 375 } DataAdviseHolder;
 376
 377 /**************************************************************************
 378  *  DataAdviseHolder method prototypes
 379  */
 380 static IDataAdviseHolder* DataAdviseHolder_Constructor();
 381 static void               DataAdviseHolder_Destructor(DataAdviseHolder* ptrToDestroy);
 382 static HRESULT WINAPI     DataAdviseHolder_QueryInterface(
 383                             IDataAdviseHolder*      iface,
 384                             REFIID                  riid,
 385                             void**                  ppvObject);
 386 static ULONG WINAPI       DataAdviseHolder_AddRef(
 387                             IDataAdviseHolder*      iface);
 388 static ULONG WINAPI       DataAdviseHolder_Release(
 389                             IDataAdviseHolder*      iface);
 390 static HRESULT WINAPI     DataAdviseHolder_Advise(
 391                             IDataAdviseHolder*      iface,
 392                             IDataObject*            pDataObject,
 393                             FORMATETC*              pFetc,
 394                             DWORD                   advf,
 395                             IAdviseSink*            pAdvise,
 396                             DWORD*                  pdwConnection);
 397 static HRESULT WINAPI     DataAdviseHolder_Unadvise(
 398                             IDataAdviseHolder*      iface,
 399                             DWORD                   dwConnection);
 400 static HRESULT WINAPI     DataAdviseHolder_EnumAdvise(
 401                             IDataAdviseHolder*      iface,
 402                             IEnumSTATDATA**         ppenumAdvise);
 403 static HRESULT WINAPI     DataAdviseHolder_SendOnDataChange(
 404                             IDataAdviseHolder*      iface,
 405                             IDataObject*            pDataObject,
 406                             DWORD                   dwReserved,
 407                             DWORD                   advf);
 408
 409 /**************************************************************************
 410  *  DataAdviseHolderImpl_VTable
 411  */
 412 static struct ICOM_VTABLE(IDataAdviseHolder) DataAdviseHolderImpl_VTable =
 413 {
 414   ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 415   DataAdviseHolder_QueryInterface,
 416   DataAdviseHolder_AddRef,
 417   DataAdviseHolder_Release,
 418   DataAdviseHolder_Advise,
 419   DataAdviseHolder_Unadvise,
 420   DataAdviseHolder_EnumAdvise,
 421   DataAdviseHolder_SendOnDataChange
 422 };
 423
 424 /******************************************************************************
 425  * DataAdviseHolder_Constructor
 426  */
 427 static IDataAdviseHolder* DataAdviseHolder_Constructor()
 428 {
 429   DataAdviseHolder* newHolder;
 430
 431   newHolder = (DataAdviseHolder*)HeapAlloc(GetProcessHeap(),
 432                                            0,
 433                                            sizeof(DataAdviseHolder));
 434
 435   ICOM_VTBL(newHolder) = &DataAdviseHolderImpl_VTable;
 436   newHolder->ref = 1;
 437   newHolder->maxCons = INITIAL_SINKS;
 438   newHolder->Connections = HeapAlloc(GetProcessHeap(),
 439                                      HEAP_ZERO_MEMORY,
 440                                      newHolder->maxCons *
 441                                      sizeof(DataAdviseConnection));
 442
 443   TRACE("returning %p\n", newHolder);
 444   return (IDataAdviseHolder*)newHolder;
 445 }
 446
 447 /******************************************************************************
 448  * DataAdviseHolder_Destructor
 449  */
 450 static void DataAdviseHolder_Destructor(DataAdviseHolder* ptrToDestroy)
 451 {
 452   DWORD index;
 453   TRACE("%p\n", ptrToDestroy);
 454
 455   for (index = 0; index < ptrToDestroy->maxCons; index++)
 456   {
 457     if (ptrToDestroy->Connections[index].sink != NULL)
 458     {
 459       IAdviseSink_Release(ptrToDestroy->Connections[index].sink);
 460       ptrToDestroy->Connections[index].sink = NULL;
 461     }
 462   }
 463
 464   HeapFree(GetProcessHeap(), 0, ptrToDestroy->Connections);
 465   HeapFree(GetProcessHeap(), 0, ptrToDestroy);
 466 }
 467
 468 /************************************************************************
 469  * DataAdviseHolder_QueryInterface (IUnknown)
 470  *
 471  * See Windows documentation for more details on IUnknown methods.
 472  */
 473 static HRESULT WINAPI DataAdviseHolder_QueryInterface(
 474   IDataAdviseHolder*      iface,
 475   REFIID                  riid,
 476   void**                  ppvObject)
 477 {
 478   ICOM_THIS(DataAdviseHolder, iface);
 479   TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppvObject);
 480   /*
 481    * Perform a sanity check on the parameters.
 482    */
 483   if ( (This==0) || (ppvObject==0) )
 484     return E_INVALIDARG;
 485
 486   /*
 487    * Initialize the return parameter.
 488    */
 489   *ppvObject = 0;
 490
 491   /*
 492    * Compare the riid with the interface IDs implemented by this object.
 493    */
 494   if ( (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) == 0) ||
 495        (memcmp(&IID_IDataAdviseHolder, riid, sizeof(IID_IDataAdviseHolder)) == 0)  )
 496   {
 497     *ppvObject = iface;
 498   }
 499
 500   /*
 501    * Check that we obtained an interface.
 502    */
 503   if ((*ppvObject)==0)
 504   {
 505     return E_NOINTERFACE;
 506   }
 507
 508   /*
 509    * Query Interface always increases the reference count by one when it is
 510    * successful.
 511    */
 512   IUnknown_AddRef((IUnknown*)*ppvObject);
 513
 514   return S_OK;;
 515 }
 516
 517 /************************************************************************
 518  * DataAdviseHolder_AddRef (IUnknown)
 519  *
 520  * See Windows documentation for more details on IUnknown methods.
 521  */
 522 static ULONG WINAPI       DataAdviseHolder_AddRef(
 523   IDataAdviseHolder*      iface)
 524 {
 525   ICOM_THIS(DataAdviseHolder, iface);
 526   TRACE("(%p) (ref=%ld)\n", This, This->ref);
 527   This->ref++;
 528
 529   return This->ref;
 530 }
 531
 532 /************************************************************************
 533  * DataAdviseHolder_Release (IUnknown)
 534  *
 535  * See Windows documentation for more details on IUnknown methods.
 536  */
 537 static ULONG WINAPI DataAdviseHolder_Release(
 538   IDataAdviseHolder*      iface)
 539 {
 540   ICOM_THIS(DataAdviseHolder, iface);
 541   TRACE("(%p) (ref=%ld)\n", This, This->ref);
 542
 543   /*
 544    * Decrease the reference count on this object.
 545    */
 546   This->ref--;
 547
 548   /*
 549    * If the reference count goes down to 0, perform suicide.
 550    */
 551   if (This->ref==0)
 552   {
 553     DataAdviseHolder_Destructor(This);
 554
 555     return 0;
 556   }
 557
 558   return This->ref;
 559 }
 560
 561 /************************************************************************
 562  * DataAdviseHolder_Advise
 563  *
 564  */
 565 static HRESULT WINAPI DataAdviseHolder_Advise(
 566   IDataAdviseHolder*      iface,
 567   IDataObject*            pDataObject,
 568   FORMATETC*              pFetc,
 569   DWORD                   advf,
 570   IAdviseSink*            pAdvise,
 571   DWORD*                  pdwConnection)
 572 {
 573   DWORD index;
 574
 575   ICOM_THIS(DataAdviseHolder, iface);
 576
 577   TRACE("(%p)->(%p, %p, %08lx, %p, %p)\n", This, pDataObject, pFetc, advf,
 578         pAdvise, pdwConnection);
 579   /*
 580    * Sanity check
 581    */
 582   if (pdwConnection==NULL)
 583     return E_POINTER;
 584
 585   *pdwConnection = 0;
 586
 587   /*
 588    * Find a free spot in the array.
 589    */
 590   for (index = 0; index < This->maxCons; index++)
 591   {
 592     if (This->Connections[index].sink == NULL)
 593       break;
 594   }
 595
 596   /*
 597    * If the array is full, we need to grow it.
 598    */
 599   if (index == This->maxCons)
 600   {
 601     This->maxCons+=INITIAL_SINKS;
 602     This->Connections = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 603                                     This->Connections,
 604                                     This->maxCons*sizeof(DataAdviseConnection));
 605   }
 606   /*
 607    * Store the new sink
 608    */
 609   This->Connections[index].sink = pAdvise;
 610   memcpy(&(This->Connections[index].fmat), pFetc, sizeof(FORMATETC));
 611   This->Connections[index].advf = advf;
 612
 613   if (This->Connections[index].sink != NULL) {
 614     IAdviseSink_AddRef(This->Connections[index].sink);
 615     if(advf & ADVF_PRIMEFIRST) {
 616       DataAdviseHolder_SendOnDataChange(iface, pDataObject, 0, advf);
 617     }
 618   }
 619   /*
 620    * Return the index as the cookie.
 621    * Since 0 is not a valid cookie, we will increment by
 622    * 1 the index in the table.
 623    */
 624   *pdwConnection = index+1;
 625
 626   return S_OK;
 627 }
 628
 629 /******************************************************************************
 630  * DataAdviseHolder_Unadvise
 631  */
 632 static HRESULT WINAPI     DataAdviseHolder_Unadvise(
 633   IDataAdviseHolder*      iface,
 634   DWORD                   dwConnection)
 635 {
 636   ICOM_THIS(DataAdviseHolder, iface);
 637
 638   TRACE("(%p)->(%lu)\n", This, dwConnection);
 639
 640   /*
 641    * So we don't return 0 as a cookie, the index was
 642    * incremented by 1 in OleAdviseHolderImpl_Advise
 643    * we have to compensate.
 644    */
 645   dwConnection--;
 646
 647   /*
 648    * Check for invalid cookies.
 649    */
 650   if ( (dwConnection < 0) ||
 651        (dwConnection >= This->maxCons) )
 652     return OLE_E_NOCONNECTION;
 653
 654   if (This->Connections[dwConnection].sink == NULL)
 655     return OLE_E_NOCONNECTION;
 656
 657   /*
 658    * Release the sink and mark the spot in the list as free.
 659    */
 660   IAdviseSink_Release(This->Connections[dwConnection].sink);
 661   memset(&(This->Connections[dwConnection]), 0, sizeof(DataAdviseConnection));
 662   return S_OK;
 663 }
 664
 665 static HRESULT WINAPI     DataAdviseHolder_EnumAdvise(
 666   IDataAdviseHolder*      iface,
 667   IEnumSTATDATA**         ppenumAdvise)
 668 {
 669   ICOM_THIS(DataAdviseHolder, iface);
 670
 671   FIXME("(%p)->(%p)\n", This, ppenumAdvise);
 672   return E_NOTIMPL;
 673 }
 674
 675 /******************************************************************************
 676  * DataAdviseHolder_SendOnDataChange
 677  */
 678 static HRESULT WINAPI     DataAdviseHolder_SendOnDataChange(
 679   IDataAdviseHolder*      iface,
 680   IDataObject*            pDataObject,
 681   DWORD                   dwReserved,
 682   DWORD                   advf)
 683 {
 684   ICOM_THIS(DataAdviseHolder, iface);
 685   DWORD index;
 686   STGMEDIUM stg;
 687   HRESULT res;
 688
 689   TRACE("(%p)->(%p,%08lx,%08lx)\n", This, pDataObject, dwReserved, advf);
 690
 691   for(index = 0; index < This->maxCons; index++) {
 692     if(This->Connections[index].sink != NULL) {
 693       if(!(This->Connections[index].advf & ADVF_NODATA)) {
 694         TRACE("Calling IDataObject_GetData\n");
 695         res = IDataObject_GetData(pDataObject,
 696                                   &(This->Connections[index].fmat),
 697                                   &stg);
 698         TRACE("returns %08lx\n", res);
 699       }
 700       TRACE("Calling IAdviseSink_OnDataChange\n");
 701       IAdviseSink_OnDataChange(This->Connections[index].sink,
 702                                      &(This->Connections[index].fmat),
 703                                      &stg);
 704       TRACE("Done IAdviseSink_OnDataChange\n");
 705       if(This->Connections[index].advf & ADVF_ONLYONCE) {
 706         TRACE("Removing connection\n");
 707         DataAdviseHolder_Unadvise(iface, index+1);
 708       }
 709     }
 710   }
 711   return S_OK;
 712 }
 713
 714 /***********************************************************************
 715  * API functions
 716  */
 717
 718 /***********************************************************************
 719  * CreateOleAdviseHolder [OLE32.59]
 720  */
 721 HRESULT WINAPI CreateOleAdviseHolder(
 722   LPOLEADVISEHOLDER *ppOAHolder)
 723 {
 724   TRACE("(%p)\n", ppOAHolder);
 725
 726   /*
 727    * Sanity check,
 728    */
 729   if (ppOAHolder==NULL)
 730     return E_POINTER;
 731
 732   *ppOAHolder = OleAdviseHolderImpl_Constructor ();
 733
 734   if (*ppOAHolder != NULL)
 735     return S_OK;
 736
 737   return E_OUTOFMEMORY;
 738 }
 739
 740 /******************************************************************************
 741  *              CreateDataAdviseHolder        [OLE32.53]
 742  */
 743 HRESULT WINAPI CreateDataAdviseHolder(
 744   LPDATAADVISEHOLDER* ppDAHolder)
 745 {
 746   TRACE("(%p)\n", ppDAHolder);
 747
 748   /*
 749    * Sanity check,
 750    */
 751   if (ppDAHolder==NULL)
 752     return E_POINTER;
 753
 754   *ppDAHolder = DataAdviseHolder_Constructor();
 755
 756   if (*ppDAHolder != NULL)
 757     return S_OK;
 758
 759   return E_OUTOFMEMORY;
 760 }
 761