dlls/ole32/bindctx.c

   1 /*
   2  *                            BindCtx implementation
   3  *
   4  *  Copyright 1999  Noomen Hamza
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <string.h>
  23
  24 #define COBJMACROS
  25
  26 #include "winerror.h"
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "winnls.h"
  30 #include "objbase.h"
  31
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  35
  36 #define  BINDCTX_FIRST_TABLE_SIZE 4
  37
  38 /* data structure of the BindCtx table elements */
  39 typedef struct BindCtxObject{
  40
  41     IUnknown*   pObj; /* point on a bound object */
  42
  43     LPOLESTR  pkeyObj; /* key associated to this bound object */
  44
  45     BYTE regType; /* registration type: 1 if RegisterObjectParam and 0 if RegisterObjectBound */
  46
  47 } BindCtxObject;
  48
  49 /* BindCtx data structure */
  50 typedef struct BindCtxImpl{
  51
  52     const IBindCtxVtbl *lpVtbl; /* VTable relative to the IBindCtx interface.*/
  53
  54     LONG ref; /* reference counter for this object */
  55
  56     BindCtxObject* bindCtxTable; /* this is a table in which all bounded objects are stored*/
  57     DWORD          bindCtxTableLastIndex;  /* first free index in the table */
  58     DWORD          bindCtxTableSize;   /* size table */
  59
  60     BIND_OPTS2 bindOption2; /* a structure which contains the bind options*/
  61
  62 } BindCtxImpl;
  63
  64 /* IBindCtx prototype functions : */
  65 static HRESULT WINAPI BindCtxImpl_ReleaseBoundObjects(IBindCtx*);
  66 static HRESULT BindCtxImpl_GetObjectIndex(BindCtxImpl*, IUnknown*, LPOLESTR, DWORD *);
  67 static HRESULT BindCtxImpl_ExpandTable(BindCtxImpl *);
  68
  69 /*******************************************************************************
  70  *        BindCtx_QueryInterface
  71  *******************************************************************************/
  72 static HRESULT WINAPI
  73 BindCtxImpl_QueryInterface(IBindCtx* iface,REFIID riid,void** ppvObject)
  74 {
  75     BindCtxImpl *This = (BindCtxImpl *)iface;
  76
  77     TRACE("(%p %s %p)\n",This, debugstr_guid(riid), ppvObject);
  78
  79     /* Perform a sanity check on the parameters.*/
  80     if (!ppvObject)
  81         return E_POINTER;
  82
  83     /* Initialize the return parameter.*/
  84     *ppvObject = 0;
  85
  86     /* Compare the riid with the interface IDs implemented by this object.*/
  87     if (IsEqualIID(&IID_IUnknown, riid) ||
  88         IsEqualIID(&IID_IBindCtx, riid))
  89     {
  90         *ppvObject = (IBindCtx*)This;
  91         IBindCtx_AddRef(iface);
  92         return S_OK;
  93     }
  94
  95     return E_NOINTERFACE;
  96 }
  97
  98 /******************************************************************************
  99  *       BindCtx_AddRef
 100  ******************************************************************************/
 101 static ULONG WINAPI BindCtxImpl_AddRef(IBindCtx* iface)
 102 {
 103     BindCtxImpl *This = (BindCtxImpl *)iface;
 104
 105     TRACE("(%p)\n",This);
 106
 107     return InterlockedIncrement(&This->ref);
 108 }
 109
 110 /******************************************************************************
 111  *        BindCtx_Destroy    (local function)
 112  *******************************************************************************/
 113 static HRESULT BindCtxImpl_Destroy(BindCtxImpl* This)
 114 {
 115     TRACE("(%p)\n",This);
 116
 117     /* free the table space memory */
 118     HeapFree(GetProcessHeap(),0,This->bindCtxTable);
 119
 120     /* free the bindctx structure */
 121     HeapFree(GetProcessHeap(),0,This);
 122
 123     return S_OK;
 124 }
 125
 126 /******************************************************************************
 127  *        BindCtx_Release
 128  ******************************************************************************/
 129 static ULONG WINAPI BindCtxImpl_Release(IBindCtx* iface)
 130 {
 131     BindCtxImpl *This = (BindCtxImpl *)iface;
 132     ULONG ref;
 133
 134     TRACE("(%p)\n",This);
 135
 136     ref = InterlockedDecrement(&This->ref);
 137     if (ref == 0)
 138     {
 139         /* release all registered objects */
 140         BindCtxImpl_ReleaseBoundObjects((IBindCtx*)This);
 141
 142         BindCtxImpl_Destroy(This);
 143     }
 144     return ref;
 145 }
 146
 147
 148 /******************************************************************************
 149  *        BindCtx_RegisterObjectBound
 150  ******************************************************************************/
 151 static HRESULT WINAPI
 152 BindCtxImpl_RegisterObjectBound(IBindCtx* iface,IUnknown* punk)
 153 {
 154     BindCtxImpl *This = (BindCtxImpl *)iface;
 155     DWORD lastIndex=This->bindCtxTableLastIndex;
 156
 157     TRACE("(%p,%p)\n",This,punk);
 158
 159     if (punk==NULL)
 160         return S_OK;
 161
 162     if (lastIndex == This->bindCtxTableSize)
 163     {
 164         HRESULT hr = BindCtxImpl_ExpandTable(This);
 165         if (FAILED(hr))
 166             return hr;
 167     }
 168
 169     IUnknown_AddRef(punk);
 170
 171     /* put the object in the first free element in the table */
 172     This->bindCtxTable[lastIndex].pObj = punk;
 173     This->bindCtxTable[lastIndex].pkeyObj = NULL;
 174     This->bindCtxTable[lastIndex].regType = 0;
 175     lastIndex= ++This->bindCtxTableLastIndex;
 176
 177     return S_OK;
 178 }
 179
 180 /******************************************************************************
 181  *        BindCtx_RevokeObjectBound
 182  ******************************************************************************/
 183 static HRESULT WINAPI
 184 BindCtxImpl_RevokeObjectBound(IBindCtx* iface, IUnknown* punk)
 185 {
 186     DWORD index,j;
 187
 188     BindCtxImpl *This = (BindCtxImpl *)iface;
 189
 190     TRACE("(%p,%p)\n",This,punk);
 191
 192     if (!punk)
 193         return E_INVALIDARG;
 194
 195     /* check if the object was registered or not */
 196     if (BindCtxImpl_GetObjectIndex(This,punk,NULL,&index)==S_FALSE)
 197         return MK_E_NOTBOUND;
 198
 199     if(This->bindCtxTable[index].pObj)
 200         IUnknown_Release(This->bindCtxTable[index].pObj);
 201     HeapFree(GetProcessHeap(),0,This->bindCtxTable[index].pkeyObj);
 202
 203     /* left-shift all elements in the right side of the current revoked object */
 204     for(j=index; j<This->bindCtxTableLastIndex-1; j++)
 205         This->bindCtxTable[j]= This->bindCtxTable[j+1];
 206
 207     This->bindCtxTableLastIndex--;
 208
 209     return S_OK;
 210 }
 211
 212 /******************************************************************************
 213  *        BindCtx_ReleaseBoundObjects
 214  ******************************************************************************/
 215 static HRESULT WINAPI
 216 BindCtxImpl_ReleaseBoundObjects(IBindCtx* iface)
 217 {
 218     DWORD i;
 219
 220     BindCtxImpl *This = (BindCtxImpl *)iface;
 221
 222     TRACE("(%p)\n",This);
 223
 224     for(i=0;i<This->bindCtxTableLastIndex;i++)
 225     {
 226         if(This->bindCtxTable[i].pObj)
 227             IUnknown_Release(This->bindCtxTable[i].pObj);
 228         HeapFree(GetProcessHeap(),0,This->bindCtxTable[i].pkeyObj);
 229     }
 230
 231     This->bindCtxTableLastIndex = 0;
 232
 233     return S_OK;
 234 }
 235
 236 /******************************************************************************
 237  *        BindCtx_SetBindOptions
 238  ******************************************************************************/
 239 static HRESULT WINAPI
 240 BindCtxImpl_SetBindOptions(IBindCtx* iface,BIND_OPTS *pbindopts)
 241 {
 242     BindCtxImpl *This = (BindCtxImpl *)iface;
 243
 244     TRACE("(%p,%p)\n",This,pbindopts);
 245
 246     if (pbindopts==NULL)
 247         return E_POINTER;
 248
 249     if (pbindopts->cbStruct > sizeof(BIND_OPTS2))
 250     {
 251         WARN("invalid size\n");
 252         return E_INVALIDARG; /* FIXME : not verified */
 253     }
 254     memcpy(&This->bindOption2, pbindopts, pbindopts->cbStruct);
 255     return S_OK;
 256 }
 257
 258 /******************************************************************************
 259  *        BindCtx_GetBindOptions
 260  ******************************************************************************/
 261 static HRESULT WINAPI
 262 BindCtxImpl_GetBindOptions(IBindCtx* iface,BIND_OPTS *pbindopts)
 263 {
 264     BindCtxImpl *This = (BindCtxImpl *)iface;
 265     ULONG cbStruct;
 266
 267     TRACE("(%p,%p)\n",This,pbindopts);
 268
 269     if (pbindopts==NULL)
 270         return E_POINTER;
 271
 272     cbStruct = pbindopts->cbStruct;
 273     if (cbStruct > sizeof(BIND_OPTS2))
 274         cbStruct = sizeof(BIND_OPTS2);
 275
 276     memcpy(pbindopts, &This->bindOption2, cbStruct);
 277     pbindopts->cbStruct = cbStruct;
 278
 279     return S_OK;
 280 }
 281
 282 /******************************************************************************
 283  *        BindCtx_GetRunningObjectTable
 284  ******************************************************************************/
 285 static HRESULT WINAPI
 286 BindCtxImpl_GetRunningObjectTable(IBindCtx* iface,IRunningObjectTable** pprot)
 287 {
 288     HRESULT res;
 289
 290     BindCtxImpl *This = (BindCtxImpl *)iface;
 291
 292     TRACE("(%p,%p)\n",This,pprot);
 293
 294     if (pprot==NULL)
 295         return E_POINTER;
 296
 297     res=GetRunningObjectTable(0, pprot);
 298
 299     return res;
 300 }
 301
 302 /******************************************************************************
 303  *        BindCtx_RegisterObjectParam
 304  ******************************************************************************/
 305 static HRESULT WINAPI
 306 BindCtxImpl_RegisterObjectParam(IBindCtx* iface,LPOLESTR pszkey, IUnknown* punk)
 307 {
 308     DWORD index=0;
 309     BindCtxImpl *This = (BindCtxImpl *)iface;
 310
 311     TRACE("(%p,%s,%p)\n",This,debugstr_w(pszkey),punk);
 312
 313     if (punk==NULL)
 314         return E_INVALIDARG;
 315
 316     if (pszkey!=NULL && BindCtxImpl_GetObjectIndex(This,NULL,pszkey,&index)==S_OK)
 317     {
 318         TRACE("Overwriting existing key\n");
 319         if(This->bindCtxTable[index].pObj!=NULL)
 320             IUnknown_Release(This->bindCtxTable[index].pObj);
 321         This->bindCtxTable[index].pObj=punk;
 322         IUnknown_AddRef(punk);
 323         return S_OK;
 324     }
 325
 326     if (This->bindCtxTableLastIndex == This->bindCtxTableSize)
 327     {
 328         HRESULT hr = BindCtxImpl_ExpandTable(This);
 329         if (FAILED(hr))
 330             return hr;
 331     }
 332
 333     This->bindCtxTable[This->bindCtxTableLastIndex].pObj = punk;
 334     This->bindCtxTable[This->bindCtxTableLastIndex].regType = 1;
 335
 336     if (pszkey==NULL)
 337
 338         This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj=NULL;
 339
 340     else
 341     {
 342
 343         This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj=
 344             HeapAlloc(GetProcessHeap(),0,(sizeof(WCHAR)*(1+lstrlenW(pszkey))));
 345
 346         if (This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj==NULL)
 347             return E_OUTOFMEMORY;
 348         lstrcpyW(This->bindCtxTable[This->bindCtxTableLastIndex].pkeyObj,pszkey);
 349     }
 350
 351     This->bindCtxTableLastIndex++;
 352
 353     IUnknown_AddRef(punk);
 354     return S_OK;
 355 }
 356
 357 /******************************************************************************
 358  *        BindCtx_GetObjectParam
 359  ******************************************************************************/
 360 static HRESULT WINAPI
 361 BindCtxImpl_GetObjectParam(IBindCtx* iface,LPOLESTR pszkey, IUnknown** punk)
 362 {
 363     DWORD index;
 364     BindCtxImpl *This = (BindCtxImpl *)iface;
 365
 366     TRACE("(%p,%s,%p)\n",This,debugstr_w(pszkey),punk);
 367
 368     if (punk==NULL)
 369         return E_POINTER;
 370
 371     *punk=0;
 372
 373     if (BindCtxImpl_GetObjectIndex(This,NULL,pszkey,&index)==S_FALSE)
 374         return E_FAIL;
 375
 376     IUnknown_AddRef(This->bindCtxTable[index].pObj);
 377
 378     *punk = This->bindCtxTable[index].pObj;
 379
 380     return S_OK;
 381 }
 382
 383 /******************************************************************************
 384  *        BindCtx_RevokeObjectParam
 385  ******************************************************************************/
 386 static HRESULT WINAPI
 387 BindCtxImpl_RevokeObjectParam(IBindCtx* iface,LPOLESTR ppenum)
 388 {
 389     DWORD index,j;
 390
 391     BindCtxImpl *This = (BindCtxImpl *)iface;
 392
 393     TRACE("(%p,%s)\n",This,debugstr_w(ppenum));
 394
 395     if (BindCtxImpl_GetObjectIndex(This,NULL,ppenum,&index)==S_FALSE)
 396         return E_FAIL;
 397
 398     /* release the object if it's found */
 399     if(This->bindCtxTable[index].pObj)
 400         IUnknown_Release(This->bindCtxTable[index].pObj);
 401     HeapFree(GetProcessHeap(),0,This->bindCtxTable[index].pkeyObj);
 402
 403     /* remove the object from the table with a left-shifting of all objects in the right side */
 404     for(j=index; j<This->bindCtxTableLastIndex-1; j++)
 405         This->bindCtxTable[j]= This->bindCtxTable[j+1];
 406
 407     This->bindCtxTableLastIndex--;
 408
 409     return S_OK;
 410 }
 411
 412 /******************************************************************************
 413  *        BindCtx_EnumObjectParam
 414  ******************************************************************************/
 415 static HRESULT WINAPI
 416 BindCtxImpl_EnumObjectParam(IBindCtx* iface,IEnumString** pszkey)
 417 {
 418     TRACE("(%p,%p)\n",iface,pszkey);
 419
 420     *pszkey = NULL;
 421
 422     /* not implemented in native either */
 423     return E_NOTIMPL;
 424 }
 425
 426 /********************************************************************************
 427  *        GetObjectIndex (local function)
 428  ********************************************************************************/
 429 static HRESULT BindCtxImpl_GetObjectIndex(BindCtxImpl* This,
 430                                           IUnknown* punk,
 431                                           LPOLESTR pszkey,
 432                                           DWORD *index)
 433 {
 434
 435     DWORD i;
 436     BYTE found=0;
 437
 438     TRACE("(%p,%p,%p,%p)\n",This,punk,pszkey,index);
 439
 440     if (punk==NULL)
 441         /* search object identified by a register key */
 442         for(i=0; ( (i<This->bindCtxTableLastIndex) && (!found));i++)
 443         {
 444             if(This->bindCtxTable[i].regType==1){
 445
 446                 if ( ( (This->bindCtxTable[i].pkeyObj==NULL) && (pszkey==NULL) ) ||
 447                      ( (This->bindCtxTable[i].pkeyObj!=NULL) &&
 448                        (pszkey!=NULL) &&
 449                        (lstrcmpW(This->bindCtxTable[i].pkeyObj,pszkey)==0)
 450                      )
 451                    )
 452
 453                     found=1;
 454             }
 455         }
 456     else
 457         /* search object identified by a moniker*/
 458         for(i=0; ( (i<This->bindCtxTableLastIndex) && (!found));i++)
 459             if(This->bindCtxTable[i].pObj==punk)
 460                 found=1;
 461
 462     if (index != NULL)
 463         *index=i-1;
 464
 465     if (found)
 466         return S_OK;
 467     TRACE("key not found\n");
 468     return S_FALSE;
 469 }
 470
 471 static HRESULT BindCtxImpl_ExpandTable(BindCtxImpl *This)
 472 {
 473     if (!This->bindCtxTableSize)
 474     {
 475         This->bindCtxTableSize = BINDCTX_FIRST_TABLE_SIZE;
 476         This->bindCtxTable = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,
 477                                        This->bindCtxTableSize * sizeof(BindCtxObject));
 478     }
 479     else
 480     {
 481         This->bindCtxTableSize *= 2;
 482
 483         This->bindCtxTable = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,This->bindCtxTable,
 484                                          This->bindCtxTableSize * sizeof(BindCtxObject));
 485     }
 486
 487     if (!This->bindCtxTable)
 488         return E_OUTOFMEMORY;
 489
 490     return S_OK;
 491 }
 492
 493
 494 /* Virtual function table for the BindCtx class. */
 495 static const IBindCtxVtbl VT_BindCtxImpl =
 496 {
 497     BindCtxImpl_QueryInterface,
 498     BindCtxImpl_AddRef,
 499     BindCtxImpl_Release,
 500     BindCtxImpl_RegisterObjectBound,
 501     BindCtxImpl_RevokeObjectBound,
 502     BindCtxImpl_ReleaseBoundObjects,
 503     BindCtxImpl_SetBindOptions,
 504     BindCtxImpl_GetBindOptions,
 505     BindCtxImpl_GetRunningObjectTable,
 506     BindCtxImpl_RegisterObjectParam,
 507     BindCtxImpl_GetObjectParam,
 508     BindCtxImpl_EnumObjectParam,
 509     BindCtxImpl_RevokeObjectParam
 510 };
 511
 512 /******************************************************************************
 513  *         BindCtx_Construct (local function)
 514  *******************************************************************************/
 515 static HRESULT BindCtxImpl_Construct(BindCtxImpl* This)
 516 {
 517     TRACE("(%p)\n",This);
 518
 519     /* Initialize the virtual function table.*/
 520     This->lpVtbl       = &VT_BindCtxImpl;
 521     This->ref          = 0;
 522
 523     /* Initialize the BIND_OPTS2 structure */
 524     This->bindOption2.cbStruct  = sizeof(BIND_OPTS2);
 525     This->bindOption2.grfFlags = 0;
 526     This->bindOption2.grfMode = STGM_READWRITE;
 527     This->bindOption2.dwTickCountDeadline = 0;
 528
 529     This->bindOption2.dwTrackFlags = 0;
 530     This->bindOption2.dwClassContext = CLSCTX_SERVER;
 531     This->bindOption2.locale = GetThreadLocale();
 532     This->bindOption2.pServerInfo = 0;
 533
 534     /* Initialize the bindctx table */
 535     This->bindCtxTableSize=0;
 536     This->bindCtxTableLastIndex=0;
 537     This->bindCtxTable = NULL;
 538
 539     return S_OK;
 540 }
 541
 542 /******************************************************************************
 543  *        CreateBindCtx (OLE32.@)
 544  *
 545  * Creates a bind context. A bind context encompasses information and options
 546  * used when binding to a moniker.
 547  *
 548  * PARAMS
 549  *  reserved [I] Reserved. Set to 0.
 550  *  ppbc     [O] Address that receives the bind context object.
 551  *
 552  * RETURNS
 553  *  Success: S_OK.
 554  *  Failure: Any HRESULT code.
 555  */
 556 HRESULT WINAPI CreateBindCtx(DWORD reserved, LPBC * ppbc)
 557 {
 558     BindCtxImpl* newBindCtx = 0;
 559     HRESULT hr;
 560     IID riid=IID_IBindCtx;
 561
 562     TRACE("(%d,%p)\n",reserved,ppbc);
 563
 564     if (!ppbc) return E_INVALIDARG;
 565
 566     *ppbc = NULL;
 567
 568     if (reserved != 0)
 569     {
 570         ERR("reserved should be 0, not 0x%x\n", reserved);
 571         return E_INVALIDARG;
 572     }
 573
 574     newBindCtx = HeapAlloc(GetProcessHeap(), 0, sizeof(BindCtxImpl));
 575     if (newBindCtx == 0)
 576         return E_OUTOFMEMORY;
 577
 578     hr = BindCtxImpl_Construct(newBindCtx);
 579     if (FAILED(hr))
 580     {
 581         HeapFree(GetProcessHeap(),0,newBindCtx);
 582         return hr;
 583     }
 584
 585     hr = BindCtxImpl_QueryInterface((IBindCtx*)newBindCtx,&riid,(void**)ppbc);
 586
 587     return hr;
 588 }
 589
 590 /******************************************************************************
 591  *              BindMoniker        [OLE32.@]
 592  *
 593  * Binds to a moniker.
 594  *
 595  * PARAMS
 596  *  pmk      [I] Moniker to bind to.
 597  *  grfOpt   [I] Reserved option flags. Set to 0.
 598  *  riid     [I] ID of the interface to bind to.
 599  *  pvResult [O] Address that receives the interface of the object that was bound to.
 600  *
 601  * RETURNS
 602  *  Success: S_OK.
 603  *  Failure: Any HRESULT code.
 604  */
 605 HRESULT WINAPI BindMoniker(LPMONIKER pmk, DWORD grfOpt, REFIID riid, LPVOID * ppvResult)
 606 {
 607     HRESULT res;
 608     IBindCtx * pbc;
 609
 610     TRACE("(%p, %x, %s, %p)\n", pmk, grfOpt, debugstr_guid(riid), ppvResult);
 611
 612     res = CreateBindCtx(grfOpt, &pbc);
 613     if (SUCCEEDED(res))
 614     {
 615         res = IMoniker_BindToObject(pmk, pbc, NULL, riid, ppvResult);
 616         IBindCtx_Release(pbc);
 617     }
 618     return res;
 619 }