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shell32: Fixed potential buffer overwrite in execute_from_key (Coverity).
[wine/multimedia.git] / dlls / user32 / dde_misc.c
blob3cbbae8346cb04c3509bebc54bcce03826d79383
1 /*
2 * DDEML library
3 *
4 * Copyright 1997 Alexandre Julliard
5 * Copyright 1997 Len White
6 * Copyright 1999 Keith Matthews
7 * Copyright 2000 Corel
8 * Copyright 2001 Eric Pouech
9 * Copyright 2003, 2004, 2005 Dmitry Timoshkov
10 *
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 */
25
26 #include "config.h"
27 #include "wine/port.h"
28
29 #include <string.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include "windef.h"
33 #include "winbase.h"
34 #include "wingdi.h"
35 #include "winuser.h"
36 #include "dde.h"
37 #include "ddeml.h"
38 #include "win.h"
39 #include "dde_private.h"
40 #include "wine/unicode.h"
41 #include "wine/debug.h"
42
43 WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
44
45 /* convert between ATOM and HSZ avoiding compiler warnings */
46 #define ATOM2HSZ(atom) ((HSZ) (ULONG_PTR)(atom))
47 #define HSZ2ATOM(hsz) ((ATOM) (ULONG_PTR)(hsz))
48
49 static WDML_INSTANCE* WDML_InstanceList = NULL;
50 static LONG WDML_MaxInstanceID = 0; /* OK for present, have to worry about wrap-around later */
51 const WCHAR WDML_szEventClass[] = {'W','i','n','e','D','d','e','E','v','e','n','t','C','l','a','s','s',0};
52
53 /* protection for instance list */
54 static CRITICAL_SECTION WDML_CritSect;
55 static CRITICAL_SECTION_DEBUG critsect_debug =
56 {
57 0, 0, &WDML_CritSect,
58 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
59 0, 0, { (DWORD_PTR)(__FILE__ ": WDML_CritSect") }
60 };
61 static CRITICAL_SECTION WDML_CritSect = { &critsect_debug, -1, 0, 0, 0, 0 };
62
63 /* ================================================================
64 *
65 * Pure DDE (non DDEML) management
66 *
67 * ================================================================ */
68
69
70 /*****************************************************************
71 * PackDDElParam (USER32.@)
72 *
73 * RETURNS
74 * the packed lParam
75 */
76 LPARAM WINAPI PackDDElParam(UINT msg, UINT_PTR uiLo, UINT_PTR uiHi)
77 {
78 HGLOBAL hMem;
79 UINT_PTR *params;
80
81 switch (msg)
82 {
83 case WM_DDE_ACK:
84 case WM_DDE_ADVISE:
85 case WM_DDE_DATA:
86 case WM_DDE_POKE:
87 if (!(hMem = GlobalAlloc(GMEM_DDESHARE, sizeof(UINT_PTR) * 2)))
88 {
89 ERR("GlobalAlloc failed\n");
90 return 0;
91 }
92 if (!(params = GlobalLock(hMem)))
93 {
94 ERR("GlobalLock failed (%p)\n", hMem);
95 return 0;
96 }
97 params[0] = uiLo;
98 params[1] = uiHi;
99 GlobalUnlock(hMem);
100 return (LPARAM)hMem;
101
102 case WM_DDE_EXECUTE:
103 return uiHi;
104
105 default:
106 return MAKELONG(uiLo, uiHi);
107 }
108 }
109
110
111 /*****************************************************************
112 * UnpackDDElParam (USER32.@)
113 *
114 * RETURNS
115 * success: nonzero
116 * failure: zero
117 */
118 BOOL WINAPI UnpackDDElParam(UINT msg, LPARAM lParam,
119 PUINT_PTR uiLo, PUINT_PTR uiHi)
120 {
121 UINT_PTR *params;
122
123 switch (msg)
124 {
125 case WM_DDE_ACK:
126 case WM_DDE_ADVISE:
127 case WM_DDE_DATA:
128 case WM_DDE_POKE:
129 if (!lParam || !(params = GlobalLock((HGLOBAL)lParam)))
130 {
131 if (uiLo) *uiLo = 0;
132 if (uiHi) *uiHi = 0;
133 return FALSE;
134 }
135 if (uiLo) *uiLo = params[0];
136 if (uiHi) *uiHi = params[1];
137 GlobalUnlock( (HGLOBAL)lParam );
138 return TRUE;
139
140 case WM_DDE_EXECUTE:
141 if (uiLo) *uiLo = 0;
142 if (uiHi) *uiHi = lParam;
143 return TRUE;
144
145 default:
146 if (uiLo) *uiLo = LOWORD(lParam);
147 if (uiHi) *uiHi = HIWORD(lParam);
148 return TRUE;
149 }
150 }
151
152
153 /*****************************************************************
154 * FreeDDElParam (USER32.@)
155 *
156 * RETURNS
157 * success: nonzero
158 * failure: zero
159 */
160 BOOL WINAPI FreeDDElParam(UINT msg, LPARAM lParam)
161 {
162 switch (msg)
163 {
164 case WM_DDE_ACK:
165 case WM_DDE_ADVISE:
166 case WM_DDE_DATA:
167 case WM_DDE_POKE:
168 /* first check if it's a global handle */
169 if (!GlobalHandle( (LPVOID)lParam )) return TRUE;
170 return !GlobalFree( (HGLOBAL)lParam );
171
172 default:
173 return TRUE;
174 }
175 }
176
177
178 /*****************************************************************
179 * ReuseDDElParam (USER32.@)
180 *
181 * RETURNS
182 * the packed lParam
183 */
184 LPARAM WINAPI ReuseDDElParam(LPARAM lParam, UINT msgIn, UINT msgOut,
185 UINT_PTR uiLo, UINT_PTR uiHi)
186 {
187 UINT_PTR *params;
188
189 switch (msgIn)
190 {
191 case WM_DDE_ACK:
192 case WM_DDE_ADVISE:
193 case WM_DDE_DATA:
194 case WM_DDE_POKE:
195 switch(msgOut)
196 {
197 case WM_DDE_ACK:
198 case WM_DDE_ADVISE:
199 case WM_DDE_DATA:
200 case WM_DDE_POKE:
201 if (!lParam) return 0;
202 if (!(params = GlobalLock( (HGLOBAL)lParam )))
203 {
204 ERR("GlobalLock failed\n");
205 return 0;
206 }
207 params[0] = uiLo;
208 params[1] = uiHi;
209 TRACE("Reusing pack %08lx %08lx\n", uiLo, uiHi);
210 GlobalUnlock( (HGLOBAL)lParam );
211 return lParam;
212
213 case WM_DDE_EXECUTE:
214 FreeDDElParam( msgIn, lParam );
215 return uiHi;
216
217 default:
218 FreeDDElParam( msgIn, lParam );
219 return MAKELPARAM(uiLo, uiHi);
220 }
221
222 default:
223 return PackDDElParam( msgOut, uiLo, uiHi );
224 }
225 }
226
227 /*****************************************************************
228 * ImpersonateDdeClientWindow (USER32.@)
229 *
230 * PARAMS
231 * hWndClient [I] handle to DDE client window
232 * hWndServer [I] handle to DDE server window
233 */
234 BOOL WINAPI ImpersonateDdeClientWindow(HWND hWndClient, HWND hWndServer)
235 {
236 FIXME("(%p %p): stub\n", hWndClient, hWndServer);
237 return FALSE;
238 }
239
240 /*****************************************************************
241 * DdeSetQualityOfService (USER32.@)
242 */
243
244 BOOL WINAPI DdeSetQualityOfService(HWND hwndClient, CONST SECURITY_QUALITY_OF_SERVICE *pqosNew,
245 PSECURITY_QUALITY_OF_SERVICE pqosPrev)
246 {
247 FIXME("(%p %p %p): stub\n", hwndClient, pqosNew, pqosPrev);
248 return TRUE;
249 }
250
251 /* ================================================================
252 *
253 * Instance management
254 *
255 * ================================================================ */
256
257 /******************************************************************************
258 * IncrementInstanceId
259 *
260 * generic routine to increment the max instance Id and allocate a new application instance
261 */
262 static void WDML_IncrementInstanceId(WDML_INSTANCE* pInstance)
263 {
264 DWORD id = InterlockedIncrement(&WDML_MaxInstanceID);
265
266 pInstance->instanceID = id;
267 TRACE("New instance id %d allocated\n", id);
268 }
269
270 /******************************************************************
271 * WDML_EventProc
272 *
273 *
274 */
275 static LRESULT CALLBACK WDML_EventProc(HWND hwndEvent, UINT uMsg, WPARAM wParam, LPARAM lParam)
276 {
277 WDML_INSTANCE* pInstance;
278 HSZ hsz1, hsz2;
279
280 switch (uMsg)
281 {
282 case WM_WDML_REGISTER:
283 pInstance = WDML_GetInstanceFromWnd(hwndEvent);
284 /* try calling the Callback */
285 if (pInstance && !(pInstance->CBFflags & CBF_SKIP_REGISTRATIONS))
286 {
287 hsz1 = WDML_MakeHszFromAtom(pInstance, wParam);
288 hsz2 = WDML_MakeHszFromAtom(pInstance, lParam);
289 WDML_InvokeCallback(pInstance, XTYP_REGISTER, 0, 0, hsz1, hsz2, 0, 0, 0);
290 WDML_DecHSZ(pInstance, hsz1);
291 WDML_DecHSZ(pInstance, hsz2);
292 }
293 break;
294
295 case WM_WDML_UNREGISTER:
296 pInstance = WDML_GetInstanceFromWnd(hwndEvent);
297 if (pInstance && !(pInstance->CBFflags & CBF_SKIP_UNREGISTRATIONS))
298 {
299 hsz1 = WDML_MakeHszFromAtom(pInstance, wParam);
300 hsz2 = WDML_MakeHszFromAtom(pInstance, lParam);
301 WDML_InvokeCallback(pInstance, XTYP_UNREGISTER, 0, 0, hsz1, hsz2, 0, 0, 0);
302 WDML_DecHSZ(pInstance, hsz1);
303 WDML_DecHSZ(pInstance, hsz2);
304 }
305 break;
306
307 case WM_WDML_CONNECT_CONFIRM:
308 pInstance = WDML_GetInstanceFromWnd(hwndEvent);
309 if (pInstance && !(pInstance->CBFflags & CBF_SKIP_CONNECT_CONFIRMS))
310 {
311 WDML_CONV* pConv;
312 /* confirm connection...
313 * lookup for this conv handle
314 */
315 HWND client = WIN_GetFullHandle( (HWND)wParam );
316 HWND server = WIN_GetFullHandle( (HWND)lParam );
317 for (pConv = pInstance->convs[WDML_SERVER_SIDE]; pConv != NULL; pConv = pConv->next)
318 {
319 if (pConv->hwndClient == client && pConv->hwndServer == server)
320 break;
321 }
322 if (pConv)
323 {
324 pConv->wStatus |= ST_ISLOCAL;
325
326 WDML_InvokeCallback(pInstance, XTYP_CONNECT_CONFIRM, 0, (HCONV)pConv,
327 pConv->hszTopic, pConv->hszService, 0, 0,
328 (pConv->wStatus & ST_ISSELF) ? 1 : 0);
329 }
330 }
331 break;
332 default:
333 return DefWindowProcW(hwndEvent, uMsg, wParam, lParam);
334 }
335 return 0;
336 }
337
338 /******************************************************************
339 * WDML_Initialize
340 *
341 *
342 */
343 UINT WDML_Initialize(LPDWORD pidInst, PFNCALLBACK pfnCallback,
344 DWORD afCmd, DWORD ulRes, BOOL bUnicode, BOOL b16)
345 {
346 WDML_INSTANCE* pInstance;
347 WDML_INSTANCE* reference_inst;
348 UINT ret;
349 WNDCLASSEXW wndclass;
350
351 TRACE("(%p,%p,0x%x,%d,0x%x)\n",
352 pidInst, pfnCallback, afCmd, ulRes, bUnicode);
353
354 if (ulRes)
355 {
356 ERR("Reserved value not zero? What does this mean?\n");
357 /* trap this and no more until we know more */
358 return DMLERR_NO_ERROR;
359 }
360
361 /* grab enough heap for one control struct - not really necessary for re-initialise
362 * but allows us to use same validation routines */
363 pInstance = HeapAlloc(GetProcessHeap(), 0, sizeof(WDML_INSTANCE));
364 if (pInstance == NULL)
365 {
366 /* catastrophe !! warn user & abort */
367 ERR("Instance create failed - out of memory\n");
368 return DMLERR_SYS_ERROR;
369 }
370 pInstance->next = NULL;
371 pInstance->monitor = (afCmd | APPCLASS_MONITOR);
372
373 /* messy bit, spec implies that 'Client Only' can be set in 2 different ways, catch 1 here */
374
375 pInstance->clientOnly = afCmd & APPCMD_CLIENTONLY;
376 pInstance->instanceID = *pidInst; /* May need to add calling proc Id */
377 pInstance->threadID = GetCurrentThreadId();
378 pInstance->callback = *pfnCallback;
379 pInstance->unicode = bUnicode;
380 pInstance->win16 = b16;
381 pInstance->nodeList = NULL; /* node will be added later */
382 pInstance->monitorFlags = afCmd & MF_MASK;
383 pInstance->wStatus = 0;
384 pInstance->servers = NULL;
385 pInstance->convs[0] = NULL;
386 pInstance->convs[1] = NULL;
387 pInstance->links[0] = NULL;
388 pInstance->links[1] = NULL;
389
390 /* isolate CBF flags in one go, expect this will go the way of all attempts to be clever !! */
391
392 pInstance->CBFflags = afCmd^((afCmd&MF_MASK)|((afCmd&APPCMD_MASK)|(afCmd&APPCLASS_MASK)));
393
394 if (!pInstance->clientOnly)
395 {
396 /* Check for other way of setting Client-only !! */
397 pInstance->clientOnly =
398 (pInstance->CBFflags & CBF_FAIL_ALLSVRXACTIONS) == CBF_FAIL_ALLSVRXACTIONS;
399 }
400
401 TRACE("instance created - checking validity\n");
402
403 if (*pidInst == 0)
404 {
405 /* Initialisation of new Instance Identifier */
406 TRACE("new instance, callback %p flags %X\n",pfnCallback,afCmd);
407
408 EnterCriticalSection(&WDML_CritSect);
409
410 if (WDML_InstanceList == NULL)
411 {
412 /* can't be another instance in this case, assign to the base pointer */
413 WDML_InstanceList = pInstance;
414
415 /* since first must force filter of XTYP_CONNECT and XTYP_WILDCONNECT for
416 * present
417 * ------------------------------- NOTE NOTE NOTE --------------------------
418 *
419 * the manual is not clear if this condition
420 * applies to the first call to DdeInitialize from an application, or the
421 * first call for a given callback !!!
422 */
423
424 pInstance->CBFflags = pInstance->CBFflags|APPCMD_FILTERINITS;
425 TRACE("First application instance detected OK\n");
426 /* allocate new instance ID */
427 WDML_IncrementInstanceId(pInstance);
428 }
429 else
430 {
431 /* really need to chain the new one in to the latest here, but after checking conditions
432 * such as trying to start a conversation from an application trying to monitor */
433 reference_inst = WDML_InstanceList;
434 TRACE("Subsequent application instance - starting checks\n");
435 while (reference_inst->next != NULL)
436 {
437 /*
438 * This set of tests will work if application uses same instance Id
439 * at application level once allocated - which is what manual implies
440 * should happen. If someone tries to be
441 * clever (lazy ?) it will fail to pick up that later calls are for
442 * the same application - should we trust them ?
443 */
444 if (pInstance->instanceID == reference_inst->instanceID)
445 {
446 /* Check 1 - must be same Client-only state */
447
448 if (pInstance->clientOnly != reference_inst->clientOnly)
449 {
450 ret = DMLERR_DLL_USAGE;
451 goto theError;
452 }
453
454 /* Check 2 - cannot use 'Monitor' with any non-monitor modes */
455
456 if (pInstance->monitor != reference_inst->monitor)
457 {
458 ret = DMLERR_INVALIDPARAMETER;
459 goto theError;
460 }
461
462 /* Check 3 - must supply different callback address */
463
464 if (pInstance->callback == reference_inst->callback)
465 {
466 ret = DMLERR_DLL_USAGE;
467 goto theError;
468 }
469 }
470 reference_inst = reference_inst->next;
471 }
472 /* All cleared, add to chain */
473
474 TRACE("Application Instance checks finished\n");
475 WDML_IncrementInstanceId(pInstance);
476 reference_inst->next = pInstance;
477 }
478 LeaveCriticalSection(&WDML_CritSect);
479
480 *pidInst = pInstance->instanceID;
481
482 /* for deadlock issues, windows must always be created when outside the critical section */
483 wndclass.cbSize = sizeof(wndclass);
484 wndclass.style = 0;
485 wndclass.lpfnWndProc = WDML_EventProc;
486 wndclass.cbClsExtra = 0;
487 wndclass.cbWndExtra = sizeof(ULONG_PTR);
488 wndclass.hInstance = 0;
489 wndclass.hIcon = 0;
490 wndclass.hCursor = 0;
491 wndclass.hbrBackground = 0;
492 wndclass.lpszMenuName = NULL;
493 wndclass.lpszClassName = WDML_szEventClass;
494 wndclass.hIconSm = 0;
495
496 RegisterClassExW(&wndclass);
497
498 pInstance->hwndEvent = CreateWindowW(WDML_szEventClass, NULL,
499 WS_POPUP, 0, 0, 0, 0,
500 0, 0, 0, 0);
501
502 SetWindowLongPtrW(pInstance->hwndEvent, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
503
504 TRACE("New application instance processing finished OK\n");
505 }
506 else
507 {
508 /* Reinitialisation situation --- FIX */
509 TRACE("reinitialisation of (%p,%p,0x%x,%d): stub\n", pidInst, pfnCallback, afCmd, ulRes);
510
511 EnterCriticalSection(&WDML_CritSect);
512
513 if (WDML_InstanceList == NULL)
514 {
515 ret = DMLERR_INVALIDPARAMETER;
516 goto theError;
517 }
518 /* can't reinitialise if we have initialised nothing !! */
519 reference_inst = WDML_InstanceList;
520 /* must first check if we have been given a valid instance to re-initialise !! how do we do that ? */
521 /*
522 * MS allows initialisation without specifying a callback, should we allow addition of the
523 * callback by a later call to initialise ? - if so this lot will have to change
524 */
525 while (reference_inst->next != NULL)
526 {
527 if (*pidInst == reference_inst->instanceID && pfnCallback == reference_inst->callback)
528 {
529 /* Check 1 - cannot change client-only mode if set via APPCMD_CLIENTONLY */
530
531 if (reference_inst->clientOnly)
532 {
533 if ((reference_inst->CBFflags & CBF_FAIL_ALLSVRXACTIONS) != CBF_FAIL_ALLSVRXACTIONS)
534 {
535 /* i.e. Was set to Client-only and through APPCMD_CLIENTONLY */
536
537 if (!(afCmd & APPCMD_CLIENTONLY))
538 {
539 ret = DMLERR_INVALIDPARAMETER;
540 goto theError;
541 }
542 }
543 }
544 /* Check 2 - cannot change monitor modes */
545
546 if (pInstance->monitor != reference_inst->monitor)
547 {
548 ret = DMLERR_INVALIDPARAMETER;
549 goto theError;
550 }
551
552 /* Check 3 - trying to set Client-only via APPCMD when not set so previously */
553
554 if ((afCmd&APPCMD_CLIENTONLY) && !reference_inst->clientOnly)
555 {
556 ret = DMLERR_INVALIDPARAMETER;
557 goto theError;
558 }
559 break;
560 }
561 reference_inst = reference_inst->next;
562 }
563 if (reference_inst->next == NULL)
564 {
565 ret = DMLERR_INVALIDPARAMETER;
566 goto theError;
567 }
568 /* All checked - change relevant flags */
569
570 reference_inst->CBFflags = pInstance->CBFflags;
571 reference_inst->clientOnly = pInstance->clientOnly;
572 reference_inst->monitorFlags = pInstance->monitorFlags;
573
574 HeapFree(GetProcessHeap(), 0, pInstance); /* finished - release heap space used as work store */
575
576 LeaveCriticalSection(&WDML_CritSect);
577 }
578
579 return DMLERR_NO_ERROR;
580 theError:
581 HeapFree(GetProcessHeap(), 0, pInstance);
582 LeaveCriticalSection(&WDML_CritSect);
583 return ret;
584 }
585
586 /******************************************************************************
587 * DdeInitializeA (USER32.@)
588 *
589 * See DdeInitializeW.
590 */
591 UINT WINAPI DdeInitializeA(LPDWORD pidInst, PFNCALLBACK pfnCallback,
592 DWORD afCmd, DWORD ulRes)
593 {
594 return WDML_Initialize(pidInst, pfnCallback, afCmd, ulRes, FALSE, FALSE);
595 }
596
597 /******************************************************************************
598 * DdeInitializeW [USER32.@]
599 * Registers an application with the DDEML
600 *
601 * PARAMS
602 * pidInst [I] Pointer to instance identifier
603 * pfnCallback [I] Pointer to callback function
604 * afCmd [I] Set of command and filter flags
605 * ulRes [I] Reserved
606 *
607 * RETURNS
608 * Success: DMLERR_NO_ERROR
609 * Failure: DMLERR_DLL_USAGE, DMLERR_INVALIDPARAMETER, DMLERR_SYS_ERROR
610 */
611 UINT WINAPI DdeInitializeW(LPDWORD pidInst, PFNCALLBACK pfnCallback,
612 DWORD afCmd, DWORD ulRes)
613 {
614 return WDML_Initialize(pidInst, pfnCallback, afCmd, ulRes, TRUE, FALSE);
615 }
616
617 /*****************************************************************
618 * DdeUninitialize [USER32.@] Frees DDEML resources
619 *
620 * PARAMS
621 * idInst [I] Instance identifier
622 *
623 * RETURNS
624 * Success: TRUE
625 * Failure: FALSE
626 */
627
628 BOOL WINAPI DdeUninitialize(DWORD idInst)
629 {
630 /* Stage one - check if we have a handle for this instance
631 */
632 WDML_INSTANCE* pInstance;
633 WDML_CONV* pConv;
634 WDML_CONV* pConvNext;
635
636 TRACE("(%d)\n", idInst);
637
638 /* First check instance
639 */
640 pInstance = WDML_GetInstance(idInst);
641 if (pInstance == NULL)
642 {
643 /*
644 * Needs something here to record NOT_INITIALIZED ready for DdeGetLastError
645 */
646 return FALSE;
647 }
648
649 /* first terminate all conversations client side
650 * this shall close existing links...
651 */
652 for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv != NULL; pConv = pConvNext)
653 {
654 pConvNext = pConv->next;
655 DdeDisconnect((HCONV)pConv);
656 }
657 if (pInstance->convs[WDML_CLIENT_SIDE])
658 FIXME("still pending conversations\n");
659
660 /* then unregister all known service names */
661 DdeNameService(idInst, 0, 0, DNS_UNREGISTER);
662
663 /* Free the nodes that were not freed by this instance
664 * and remove the nodes from the list of HSZ nodes.
665 */
666 WDML_FreeAllHSZ(pInstance);
667
668 DestroyWindow(pInstance->hwndEvent);
669
670 /* OK now delete the instance handle itself */
671
672 if (WDML_InstanceList == pInstance)
673 {
674 /* special case - the first/only entry */
675 WDML_InstanceList = pInstance->next;
676 }
677 else
678 {
679 /* general case, remove entry */
680 WDML_INSTANCE* inst;
681
682 for (inst = WDML_InstanceList; inst->next != pInstance; inst = inst->next);
683 inst->next = pInstance->next;
684 }
685 /* release the heap entry
686 */
687 HeapFree(GetProcessHeap(), 0, pInstance);
688
689 return TRUE;
690 }
691
692 /******************************************************************
693 * WDML_NotifyThreadExit
694 *
695 *
696 */
697 void WDML_NotifyThreadDetach(void)
698 {
699 WDML_INSTANCE* pInstance;
700 WDML_INSTANCE* next;
701 DWORD tid = GetCurrentThreadId();
702
703 EnterCriticalSection(&WDML_CritSect);
704 for (pInstance = WDML_InstanceList; pInstance != NULL; pInstance = next)
705 {
706 next = pInstance->next;
707 if (pInstance->threadID == tid)
708 {
709 LeaveCriticalSection(&WDML_CritSect);
710 DdeUninitialize(pInstance->instanceID);
711 EnterCriticalSection(&WDML_CritSect);
712 }
713 }
714 LeaveCriticalSection(&WDML_CritSect);
715 }
716
717 /******************************************************************
718 * WDML_InvokeCallback
719 *
720 *
721 */
722 HDDEDATA WDML_InvokeCallback(WDML_INSTANCE* pInstance, UINT uType, UINT uFmt, HCONV hConv,
723 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
724 ULONG_PTR dwData1, ULONG_PTR dwData2)
725 {
726 HDDEDATA ret;
727
728 if (pInstance == NULL)
729 return NULL;
730
731 TRACE("invoking CB%d[%p] (%x %x %p %p %p %p %lx %lx)\n",
732 pInstance->win16 ? 16 : 32, pInstance->callback, uType, uFmt,
733 hConv, hsz1, hsz2, hdata, dwData1, dwData2);
734 if (pInstance->win16)
735 {
736 ret = WDML_InvokeCallback16(pInstance->callback, uType, uFmt, hConv,
737 hsz1, hsz2, hdata, dwData1, dwData2);
738 }
739 else
740 {
741 ret = pInstance->callback(uType, uFmt, hConv, hsz1, hsz2, hdata, dwData1, dwData2);
742 }
743 TRACE("done => %p\n", ret);
744 return ret;
745 }
746
747 /*****************************************************************************
748 * WDML_GetInstance
749 *
750 * generic routine to return a pointer to the relevant DDE_HANDLE_ENTRY
751 * for an instance Id, or NULL if the entry does not exist
752 *
753 */
754 WDML_INSTANCE* WDML_GetInstance(DWORD instId)
755 {
756 WDML_INSTANCE* pInstance;
757
758 EnterCriticalSection(&WDML_CritSect);
759
760 for (pInstance = WDML_InstanceList; pInstance != NULL; pInstance = pInstance->next)
761 {
762 if (pInstance->instanceID == instId)
763 {
764 if (GetCurrentThreadId() != pInstance->threadID)
765 {
766 FIXME("Tried to get instance from wrong thread\n");
767 continue;
768 }
769 break;
770 }
771 }
772
773 LeaveCriticalSection(&WDML_CritSect);
774
775 if (!pInstance)
776 WARN("Instance entry missing for id %04x\n", instId);
777 return pInstance;
778 }
779
780 /******************************************************************
781 * WDML_GetInstanceFromWnd
782 *
783 *
784 */
785 WDML_INSTANCE* WDML_GetInstanceFromWnd(HWND hWnd)
786 {
787 return (WDML_INSTANCE*)GetWindowLongPtrW(hWnd, GWL_WDML_INSTANCE);
788 }
789
790 /******************************************************************************
791 * DdeGetLastError [USER32.@] Gets most recent error code
792 *
793 * PARAMS
794 * idInst [I] Instance identifier
795 *
796 * RETURNS
797 * Last error code
798 */
799 UINT WINAPI DdeGetLastError(DWORD idInst)
800 {
801 DWORD error_code;
802 WDML_INSTANCE* pInstance;
803
804 /* First check instance
805 */
806 pInstance = WDML_GetInstance(idInst);
807 if (pInstance == NULL)
808 {
809 error_code = DMLERR_INVALIDPARAMETER;
810 }
811 else
812 {
813 error_code = pInstance->lastError;
814 pInstance->lastError = 0;
815 }
816
817 return error_code;
818 }
819
820 /******************************************************************
821 * WDML_SetAllLastError
822 *
823 *
824 */
825 static void WDML_SetAllLastError(DWORD lastError)
826 {
827 DWORD threadID;
828 WDML_INSTANCE* pInstance;
829 threadID = GetCurrentThreadId();
830 pInstance = WDML_InstanceList;
831 while (pInstance)
832 {
833 if (pInstance->threadID == threadID)
834 pInstance->lastError = lastError;
835 pInstance = pInstance->next;
836 }
837 }
838
839 /* ================================================================
840 *
841 * String management
842 *
843 * ================================================================ */
844
845
846 /******************************************************************
847 * WDML_FindNode
848 *
849 *
850 */
851 static HSZNode* WDML_FindNode(WDML_INSTANCE* pInstance, HSZ hsz)
852 {
853 HSZNode* pNode;
854
855 if (pInstance == NULL) return NULL;
856
857 for (pNode = pInstance->nodeList; pNode != NULL; pNode = pNode->next)
858 {
859 if (pNode->hsz == hsz) break;
860 }
861 if (!pNode) WARN("HSZ %p not found\n", hsz);
862 return pNode;
863 }
864
865 /******************************************************************
866 * WDML_MakeAtomFromHsz
867 *
868 * Creates a global atom from an existing HSZ
869 * Generally used before sending an HSZ as an atom to a remote app
870 */
871 ATOM WDML_MakeAtomFromHsz(HSZ hsz)
872 {
873 WCHAR nameBuffer[MAX_BUFFER_LEN];
874
875 if (GetAtomNameW(HSZ2ATOM(hsz), nameBuffer, MAX_BUFFER_LEN))
876 return GlobalAddAtomW(nameBuffer);
877 WARN("HSZ %p not found\n", hsz);
878 return 0;
879 }
880
881 /******************************************************************
882 * WDML_MakeHszFromAtom
883 *
884 * Creates a HSZ from an existing global atom
885 * Generally used while receiving a global atom and transforming it
886 * into an HSZ
887 */
888 HSZ WDML_MakeHszFromAtom(const WDML_INSTANCE* pInstance, ATOM atom)
889 {
890 WCHAR nameBuffer[MAX_BUFFER_LEN];
891
892 if (!atom) return NULL;
893
894 if (GlobalGetAtomNameW(atom, nameBuffer, MAX_BUFFER_LEN))
895 {
896 TRACE("%x => %s\n", atom, debugstr_w(nameBuffer));
897 return DdeCreateStringHandleW(pInstance->instanceID, nameBuffer, CP_WINUNICODE);
898 }
899 WARN("ATOM 0x%x not found\n", atom);
900 return 0;
901 }
902
903 /******************************************************************
904 * WDML_IncHSZ
905 *
906 *
907 */
908 BOOL WDML_IncHSZ(WDML_INSTANCE* pInstance, HSZ hsz)
909 {
910 HSZNode* pNode;
911
912 pNode = WDML_FindNode(pInstance, hsz);
913 if (!pNode) return FALSE;
914
915 pNode->refCount++;
916 return TRUE;
917 }
918
919 /******************************************************************************
920 * WDML_DecHSZ (INTERNAL)
921 *
922 * Decrease the ref count of an HSZ. If it reaches 0, the node is removed from the list
923 * of HSZ nodes
924 * Returns -1 is the HSZ isn't found, otherwise it's the current (after --) of the ref count
925 */
926 BOOL WDML_DecHSZ(WDML_INSTANCE* pInstance, HSZ hsz)
927 {
928 HSZNode* pPrev = NULL;
929 HSZNode* pCurrent;
930
931 for (pCurrent = pInstance->nodeList; pCurrent != NULL; pCurrent = (pPrev = pCurrent)->next)
932 {
933 /* If we found the node we were looking for and its ref count is one,
934 * we can remove it
935 */
936 if (pCurrent->hsz == hsz)
937 {
938 if (--pCurrent->refCount == 0)
939 {
940 if (pCurrent == pInstance->nodeList)
941 {
942 pInstance->nodeList = pCurrent->next;
943 }
944 else
945 {
946 pPrev->next = pCurrent->next;
947 }
948 HeapFree(GetProcessHeap(), 0, pCurrent);
949 DeleteAtom(HSZ2ATOM(hsz));
950 }
951 return TRUE;
952 }
953 }
954 WARN("HSZ %p not found\n", hsz);
955
956 return FALSE;
957 }
958
959 /******************************************************************************
960 * WDML_FreeAllHSZ (INTERNAL)
961 *
962 * Frees up all the strings still allocated in the list and
963 * remove all the nodes from the list of HSZ nodes.
964 */
965 void WDML_FreeAllHSZ(WDML_INSTANCE* pInstance)
966 {
967 /* Free any strings created in this instance.
968 */
969 while (pInstance->nodeList != NULL)
970 {
971 DdeFreeStringHandle(pInstance->instanceID, pInstance->nodeList->hsz);
972 }
973 }
974
975 /******************************************************************************
976 * InsertHSZNode (INTERNAL)
977 *
978 * Insert a node to the head of the list.
979 */
980 static void WDML_InsertHSZNode(WDML_INSTANCE* pInstance, HSZ hsz)
981 {
982 if (hsz != 0)
983 {
984 HSZNode* pNew = NULL;
985 /* Create a new node for this HSZ.
986 */
987 pNew = HeapAlloc(GetProcessHeap(), 0, sizeof(HSZNode));
988 if (pNew != NULL)
989 {
990 pNew->hsz = hsz;
991 pNew->next = pInstance->nodeList;
992 pNew->refCount = 1;
993 pInstance->nodeList = pNew;
994 }
995 else
996 {
997 ERR("Primary HSZ Node allocation failed - out of memory\n");
998 }
999 }
1000 }
1001
1002 /******************************************************************
1003 * WDML_QueryString
1004 *
1005 *
1006 */
1007 static int WDML_QueryString(WDML_INSTANCE* pInstance, HSZ hsz, LPVOID ptr, DWORD cchMax,
1008 int codepage)
1009 {
1010 WCHAR pString[MAX_BUFFER_LEN];
1011 int ret;
1012 /* If psz is null, we have to return only the length
1013 * of the string.
1014 */
1015 if (ptr == NULL)
1016 {
1017 ptr = pString;
1018 cchMax = MAX_BUFFER_LEN;
1019 }
1020
1021 /* if there is no input windows returns a NULL string */
1022 if (hsz == NULL)
1023 {
1024 CHAR *t_ptr = ptr;
1025 *t_ptr = '\0';
1026 return 1;
1027 }
1028
1029 switch (codepage)
1030 {
1031 case CP_WINANSI:
1032 ret = GetAtomNameA(HSZ2ATOM(hsz), ptr, cchMax);
1033 break;
1034 case CP_WINUNICODE:
1035 ret = GetAtomNameW(HSZ2ATOM(hsz), ptr, cchMax);
1036 break;
1037 default:
1038 ERR("Unknown code page %d\n", codepage);
1039 ret = 0;
1040 }
1041 return ret;
1042 }
1043
1044 /*****************************************************************
1045 * DdeQueryStringA [USER32.@]
1046 */
1047 DWORD WINAPI DdeQueryStringA(DWORD idInst, HSZ hsz, LPSTR psz, DWORD cchMax, INT iCodePage)
1048 {
1049 DWORD ret = 0;
1050 WDML_INSTANCE* pInstance;
1051
1052 TRACE("(%d, %p, %p, %d, %d)\n", idInst, hsz, psz, cchMax, iCodePage);
1053
1054 /* First check instance
1055 */
1056 pInstance = WDML_GetInstance(idInst);
1057 if (pInstance != NULL)
1058 {
1059 if (iCodePage == 0) iCodePage = CP_WINANSI;
1060 ret = WDML_QueryString(pInstance, hsz, psz, cchMax, iCodePage);
1061 }
1062
1063 TRACE("returning %d (%s)\n", ret, debugstr_a(psz));
1064 return ret;
1065 }
1066
1067 /*****************************************************************
1068 * DdeQueryStringW [USER32.@]
1069 */
1070
1071 DWORD WINAPI DdeQueryStringW(DWORD idInst, HSZ hsz, LPWSTR psz, DWORD cchMax, INT iCodePage)
1072 {
1073 DWORD ret = 0;
1074 WDML_INSTANCE* pInstance;
1075
1076 TRACE("(%d, %p, %p, %d, %d)\n", idInst, hsz, psz, cchMax, iCodePage);
1077
1078 /* First check instance
1079 */
1080 pInstance = WDML_GetInstance(idInst);
1081 if (pInstance != NULL)
1082 {
1083 if (iCodePage == 0) iCodePage = CP_WINUNICODE;
1084 ret = WDML_QueryString(pInstance, hsz, psz, cchMax, iCodePage);
1085 }
1086
1087 TRACE("returning %d (%s)\n", ret, debugstr_w(psz));
1088 return ret;
1089 }
1090
1091 /******************************************************************
1092 * DML_CreateString
1093 *
1094 *
1095 */
1096 static HSZ WDML_CreateString(WDML_INSTANCE* pInstance, LPCVOID ptr, int codepage)
1097 {
1098 HSZ hsz;
1099
1100 switch (codepage)
1101 {
1102 case CP_WINANSI:
1103 hsz = ATOM2HSZ(AddAtomA(ptr));
1104 TRACE("added atom %s with HSZ %p,\n", debugstr_a(ptr), hsz);
1105 break;
1106 case CP_WINUNICODE:
1107 hsz = ATOM2HSZ(AddAtomW(ptr));
1108 TRACE("added atom %s with HSZ %p,\n", debugstr_w(ptr), hsz);
1109 break;
1110 default:
1111 ERR("Unknown code page %d\n", codepage);
1112 return 0;
1113 }
1114 WDML_InsertHSZNode(pInstance, hsz);
1115 return hsz;
1116 }
1117
1118 /*****************************************************************
1119 * DdeCreateStringHandleA [USER32.@]
1120 *
1121 * See DdeCreateStringHandleW.
1122 */
1123 HSZ WINAPI DdeCreateStringHandleA(DWORD idInst, LPCSTR psz, INT codepage)
1124 {
1125 HSZ hsz = 0;
1126 WDML_INSTANCE* pInstance;
1127
1128 TRACE("(%d,%s,%d)\n", idInst, debugstr_a(psz), codepage);
1129
1130 pInstance = WDML_GetInstance(idInst);
1131 if (pInstance == NULL)
1132 WDML_SetAllLastError(DMLERR_INVALIDPARAMETER);
1133 else
1134 {
1135 if (codepage == 0) codepage = CP_WINANSI;
1136 hsz = WDML_CreateString(pInstance, psz, codepage);
1137 }
1138
1139 return hsz;
1140 }
1141
1142
1143 /******************************************************************************
1144 * DdeCreateStringHandleW [USER32.@] Creates handle to identify string
1145 *
1146 * PARAMS
1147 * idInst [I] Instance identifier
1148 * psz [I] Pointer to string
1149 * codepage [I] Code page identifier
1150 * RETURNS
1151 * Success: String handle
1152 * Failure: 0
1153 */
1154 HSZ WINAPI DdeCreateStringHandleW(DWORD idInst, LPCWSTR psz, INT codepage)
1155 {
1156 WDML_INSTANCE* pInstance;
1157 HSZ hsz = 0;
1158
1159 pInstance = WDML_GetInstance(idInst);
1160 if (pInstance == NULL)
1161 WDML_SetAllLastError(DMLERR_INVALIDPARAMETER);
1162 else
1163 {
1164 if (codepage == 0) codepage = CP_WINUNICODE;
1165 hsz = WDML_CreateString(pInstance, psz, codepage);
1166 }
1167
1168 return hsz;
1169 }
1170
1171 /*****************************************************************
1172 * DdeFreeStringHandle (USER32.@)
1173 * RETURNS
1174 * success: nonzero
1175 * fail: zero
1176 */
1177 BOOL WINAPI DdeFreeStringHandle(DWORD idInst, HSZ hsz)
1178 {
1179 WDML_INSTANCE* pInstance;
1180 BOOL ret = FALSE;
1181
1182 TRACE("(%d,%p):\n", idInst, hsz);
1183
1184 /* First check instance
1185 */
1186 pInstance = WDML_GetInstance(idInst);
1187 if (pInstance)
1188 ret = WDML_DecHSZ(pInstance, hsz);
1189
1190 return ret;
1191 }
1192
1193 /*****************************************************************
1194 * DdeKeepStringHandle (USER32.@)
1195 *
1196 * RETURNS
1197 * success: nonzero
1198 * fail: zero
1199 */
1200 BOOL WINAPI DdeKeepStringHandle(DWORD idInst, HSZ hsz)
1201 {
1202 WDML_INSTANCE* pInstance;
1203 BOOL ret = FALSE;
1204
1205 TRACE("(%d,%p):\n", idInst, hsz);
1206
1207 /* First check instance
1208 */
1209 pInstance = WDML_GetInstance(idInst);
1210 if (pInstance)
1211 ret = WDML_IncHSZ(pInstance, hsz);
1212
1213 return ret;
1214 }
1215
1216 /*****************************************************************
1217 * DdeCmpStringHandles (USER32.@)
1218 *
1219 * Compares the value of two string handles. This comparison is
1220 * not case sensitive.
1221 *
1222 * PARAMS
1223 * hsz1 [I] Handle to the first string
1224 * hsz2 [I] Handle to the second string
1225 *
1226 * RETURNS
1227 * -1 The value of hsz1 is zero or less than hsz2
1228 * 0 The values of hsz 1 and 2 are the same or both zero.
1229 * 1 The value of hsz2 is zero of less than hsz1
1230 */
1231 INT WINAPI DdeCmpStringHandles(HSZ hsz1, HSZ hsz2)
1232 {
1233 WCHAR psz1[MAX_BUFFER_LEN];
1234 WCHAR psz2[MAX_BUFFER_LEN];
1235 int ret = 0;
1236 int ret1, ret2;
1237
1238 ret1 = GetAtomNameW(HSZ2ATOM(hsz1), psz1, MAX_BUFFER_LEN);
1239 ret2 = GetAtomNameW(HSZ2ATOM(hsz2), psz2, MAX_BUFFER_LEN);
1240
1241 TRACE("(%p<%s> %p<%s>);\n", hsz1, debugstr_w(psz1), hsz2, debugstr_w(psz2));
1242
1243 /* Make sure we found both strings. */
1244 if (ret1 == 0 && ret2 == 0)
1245 {
1246 /* If both are not found, return both "zero strings". */
1247 ret = 0;
1248 }
1249 else if (ret1 == 0)
1250 {
1251 /* If hsz1 is a not found, return hsz1 is "zero string". */
1252 ret = -1;
1253 }
1254 else if (ret2 == 0)
1255 {
1256 /* If hsz2 is a not found, return hsz2 is "zero string". */
1257 ret = 1;
1258 }
1259 else
1260 {
1261 /* Compare the two strings we got (case insensitive). */
1262 ret = lstrcmpiW(psz1, psz2);
1263 /* Since strcmp returns any number smaller than
1264 * 0 when the first string is found to be less than
1265 * the second one we must make sure we are returning
1266 * the proper values.
1267 */
1268 if (ret < 0)
1269 {
1270 ret = -1;
1271 }
1272 else if (ret > 0)
1273 {
1274 ret = 1;
1275 }
1276 }
1277
1278 return ret;
1279 }
1280
1281 /* ================================================================
1282 *
1283 * Data handle management
1284 *
1285 * ================================================================ */
1286
1287 /*****************************************************************
1288 * DdeCreateDataHandle (USER32.@)
1289 */
1290 HDDEDATA WINAPI DdeCreateDataHandle(DWORD idInst, LPBYTE pSrc, DWORD cb, DWORD cbOff,
1291 HSZ hszItem, UINT wFmt, UINT afCmd)
1292 {
1293
1294 /* Other than check for validity we will ignore for now idInst, hszItem.
1295 * The purpose of these arguments still need to be investigated.
1296 */
1297
1298 WDML_INSTANCE* pInstance;
1299 HGLOBAL hMem;
1300 LPBYTE pByte;
1301 DDE_DATAHANDLE_HEAD* pDdh;
1302 WCHAR psz[MAX_BUFFER_LEN];
1303
1304 pInstance = WDML_GetInstance(idInst);
1305 if (pInstance == NULL)
1306 {
1307 WDML_SetAllLastError(DMLERR_INVALIDPARAMETER);
1308 return NULL;
1309 }
1310
1311 if (!GetAtomNameW(HSZ2ATOM(hszItem), psz, MAX_BUFFER_LEN))
1312 {
1313 psz[0] = HSZ2ATOM(hszItem);
1314 psz[1] = 0;
1315 }
1316
1317 TRACE("(%d,%p,cb %d, cbOff %d,%p <%s>,fmt %04x,%x)\n",
1318 idInst, pSrc, cb, cbOff, hszItem, debugstr_w(psz), wFmt, afCmd);
1319
1320 if (afCmd != 0 && afCmd != HDATA_APPOWNED)
1321 return 0;
1322
1323 /* we use the first 4 bytes to store the size */
1324 if (!(hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, cb + cbOff + sizeof(DDE_DATAHANDLE_HEAD))))
1325 {
1326 ERR("GlobalAlloc failed\n");
1327 return 0;
1328 }
1329
1330 pDdh = GlobalLock(hMem);
1331 if (!pDdh)
1332 {
1333 GlobalFree(hMem);
1334 return 0;
1335 }
1336
1337 pDdh->cfFormat = wFmt;
1338 pDdh->bAppOwned = (afCmd == HDATA_APPOWNED);
1339
1340 pByte = (LPBYTE)(pDdh + 1);
1341 if (pSrc)
1342 {
1343 memcpy(pByte, pSrc + cbOff, cb);
1344 }
1345 GlobalUnlock(hMem);
1346
1347 TRACE("=> %p\n", hMem);
1348 return (HDDEDATA)hMem;
1349 }
1350
1351 /*****************************************************************
1352 *
1353 * DdeAddData (USER32.@)
1354 */
1355 HDDEDATA WINAPI DdeAddData(HDDEDATA hData, LPBYTE pSrc, DWORD cb, DWORD cbOff)
1356 {
1357 DWORD old_sz, new_sz;
1358 LPBYTE pDst;
1359
1360 TRACE("(%p,%p,cb %d, cbOff %d)\n", hData, pSrc, cb, cbOff);
1361
1362 pDst = DdeAccessData(hData, &old_sz);
1363 if (!pDst) return 0;
1364
1365 new_sz = cb + cbOff;
1366 if (new_sz > old_sz)
1367 {
1368 DdeUnaccessData(hData);
1369 hData = GlobalReAlloc(hData, new_sz + sizeof(DDE_DATAHANDLE_HEAD),
1370 GMEM_MOVEABLE | GMEM_DDESHARE);
1371 pDst = DdeAccessData(hData, &old_sz);
1372 }
1373
1374 if (!pDst) return 0;
1375
1376 memcpy(pDst + cbOff, pSrc, cb);
1377 DdeUnaccessData(hData);
1378 return hData;
1379 }
1380
1381 /******************************************************************************
1382 * DdeGetData [USER32.@] Copies data from DDE object to local buffer
1383 *
1384 *
1385 * PARAMS
1386 * hData [I] Handle to DDE object
1387 * pDst [I] Pointer to destination buffer
1388 * cbMax [I] Amount of data to copy
1389 * cbOff [I] Offset to beginning of data
1390 *
1391 * RETURNS
1392 * Size of memory object associated with handle
1393 */
1394 DWORD WINAPI DdeGetData(HDDEDATA hData, LPBYTE pDst, DWORD cbMax, DWORD cbOff)
1395 {
1396 DWORD dwSize, dwRet;
1397 LPBYTE pByte;
1398
1399 TRACE("(%p,%p,%d,%d)\n", hData, pDst, cbMax, cbOff);
1400
1401 pByte = DdeAccessData(hData, &dwSize);
1402
1403 if (pByte)
1404 {
1405 if (!pDst)
1406 {
1407 dwRet = dwSize;
1408 }
1409 else if (cbOff + cbMax < dwSize)
1410 {
1411 dwRet = cbMax;
1412 }
1413 else if (cbOff < dwSize)
1414 {
1415 dwRet = dwSize - cbOff;
1416 }
1417 else
1418 {
1419 dwRet = 0;
1420 }
1421 if (pDst && dwRet != 0)
1422 {
1423 memcpy(pDst, pByte + cbOff, dwRet);
1424 }
1425 DdeUnaccessData(hData);
1426 }
1427 else
1428 {
1429 dwRet = 0;
1430 }
1431 return dwRet;
1432 }
1433
1434 /*****************************************************************
1435 * DdeAccessData (USER32.@)
1436 */
1437 LPBYTE WINAPI DdeAccessData(HDDEDATA hData, LPDWORD pcbDataSize)
1438 {
1439 HGLOBAL hMem = hData;
1440 DDE_DATAHANDLE_HEAD* pDdh;
1441
1442 TRACE("(%p,%p)\n", hData, pcbDataSize);
1443
1444 pDdh = GlobalLock(hMem);
1445 if (pDdh == NULL)
1446 {
1447 ERR("Failed on GlobalLock(%p)\n", hMem);
1448 return 0;
1449 }
1450
1451 if (pcbDataSize != NULL)
1452 {
1453 *pcbDataSize = GlobalSize(hMem) - sizeof(DDE_DATAHANDLE_HEAD);
1454 }
1455 TRACE("=> %p (%lu) fmt %04x\n", pDdh + 1, GlobalSize(hMem) - sizeof(DDE_DATAHANDLE_HEAD), pDdh->cfFormat);
1456 return (LPBYTE)(pDdh + 1);
1457 }
1458
1459 /*****************************************************************
1460 * DdeUnaccessData (USER32.@)
1461 */
1462 BOOL WINAPI DdeUnaccessData(HDDEDATA hData)
1463 {
1464 HGLOBAL hMem = hData;
1465
1466 TRACE("(%p)\n", hData);
1467
1468 GlobalUnlock(hMem);
1469
1470 return TRUE;
1471 }
1472
1473 /*****************************************************************
1474 * DdeFreeDataHandle (USER32.@)
1475 */
1476 BOOL WINAPI DdeFreeDataHandle(HDDEDATA hData)
1477 {
1478 TRACE("(%p)\n", hData);
1479 return GlobalFree(hData) == 0;
1480 }
1481
1482 /******************************************************************
1483 * WDML_IsAppOwned
1484 *
1485 *
1486 */
1487 BOOL WDML_IsAppOwned(HDDEDATA hData)
1488 {
1489 DDE_DATAHANDLE_HEAD* pDdh;
1490 BOOL ret = FALSE;
1491
1492 pDdh = GlobalLock(hData);
1493 if (pDdh != NULL)
1494 {
1495 ret = pDdh->bAppOwned;
1496 GlobalUnlock(hData);
1497 }
1498 return ret;
1499 }
1500
1501 /* ================================================================
1502 *
1503 * Global <=> Data handle management
1504 *
1505 * ================================================================ */
1506
1507 /* Note: we use a DDEDATA, but layout of DDEDATA, DDEADVISE and DDEPOKE structures is similar:
1508 * offset size
1509 * (bytes) (bits) comment
1510 * 0 16 bit fields for options (release, ackreq, response...)
1511 * 2 16 clipboard format
1512 * 4 ? data to be used
1513 */
1514 HDDEDATA WDML_Global2DataHandle(WDML_CONV* pConv, HGLOBAL hMem, WINE_DDEHEAD* p)
1515 {
1516 DDEDATA* pDd;
1517 HDDEDATA ret = 0;
1518 DWORD size;
1519
1520 if (hMem)
1521 {
1522 pDd = GlobalLock(hMem);
1523 size = GlobalSize(hMem) - sizeof(WINE_DDEHEAD);
1524 if (pDd)
1525 {
1526 if (p) memcpy(p, pDd, sizeof(WINE_DDEHEAD));
1527 switch (pDd->cfFormat)
1528 {
1529 default:
1530 FIXME("Unsupported format (%04x) for data %p, passing raw information\n",
1531 pDd->cfFormat, hMem);
1532 /* fall thru */
1533 case 0:
1534 case CF_TEXT:
1535 ret = DdeCreateDataHandle(pConv->instance->instanceID, pDd->Value, size, 0, 0, pDd->cfFormat, 0);
1536 break;
1537 case CF_BITMAP:
1538 if (size >= sizeof(BITMAP))
1539 {
1540 BITMAP* bmp = (BITMAP*)pDd->Value;
1541 int count = bmp->bmWidthBytes * bmp->bmHeight * bmp->bmPlanes;
1542 if (size >= sizeof(BITMAP) + count)
1543 {
1544 HBITMAP hbmp;
1545
1546 if ((hbmp = CreateBitmap(bmp->bmWidth, bmp->bmHeight,
1547 bmp->bmPlanes, bmp->bmBitsPixel,
1548 pDd->Value + sizeof(BITMAP))))
1549 {
1550 ret = DdeCreateDataHandle(pConv->instance->instanceID, (LPBYTE)&hbmp, sizeof(hbmp),
1551 0, 0, CF_BITMAP, 0);
1552 }
1553 else ERR("Can't create bmp\n");
1554 }
1555 else
1556 {
1557 ERR("Wrong count: %u / %d\n", size, count);
1558 }
1559 } else ERR("No bitmap header\n");
1560 break;
1561 }
1562 GlobalUnlock(hMem);
1563 }
1564 }
1565 return ret;
1566 }
1567
1568 /******************************************************************
1569 * WDML_DataHandle2Global
1570 *
1571 *
1572 */
1573 HGLOBAL WDML_DataHandle2Global(HDDEDATA hDdeData, BOOL fResponse, BOOL fRelease,
1574 BOOL fDeferUpd, BOOL fAckReq)
1575 {
1576 DDE_DATAHANDLE_HEAD* pDdh;
1577 DWORD dwSize;
1578 HGLOBAL hMem = 0;
1579
1580 dwSize = GlobalSize((HGLOBAL)hDdeData) - sizeof(DDE_DATAHANDLE_HEAD);
1581 pDdh = GlobalLock((HGLOBAL)hDdeData);
1582 if (dwSize && pDdh)
1583 {
1584 WINE_DDEHEAD* wdh = NULL;
1585
1586 switch (pDdh->cfFormat)
1587 {
1588 default:
1589 FIXME("Unsupported format (%04x) for data %p, passing raw information\n",
1590 pDdh->cfFormat, hDdeData);
1591 /* fall thru */
1592 case 0:
1593 case CF_TEXT:
1594 hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, sizeof(WINE_DDEHEAD) + dwSize);
1595 if (hMem && (wdh = GlobalLock(hMem)))
1596 {
1597 memcpy(wdh + 1, pDdh + 1, dwSize);
1598 }
1599 break;
1600 case CF_BITMAP:
1601 if (dwSize >= sizeof(HBITMAP))
1602 {
1603 BITMAP bmp;
1604 DWORD count;
1605 HBITMAP hbmp = *(HBITMAP*)(pDdh + 1);
1606
1607 if (GetObjectW(hbmp, sizeof(bmp), &bmp))
1608 {
1609 count = bmp.bmWidthBytes * bmp.bmHeight;
1610 hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE,
1611 sizeof(WINE_DDEHEAD) + sizeof(bmp) + count);
1612 if (hMem && (wdh = GlobalLock(hMem)))
1613 {
1614 memcpy(wdh + 1, &bmp, sizeof(bmp));
1615 GetBitmapBits(hbmp, count, ((char*)(wdh + 1)) + sizeof(bmp));
1616 }
1617 }
1618 }
1619 break;
1620 }
1621 if (wdh)
1622 {
1623 wdh->unused = 0;
1624 wdh->fResponse = fResponse;
1625 wdh->fRelease = fRelease;
1626 wdh->fDeferUpd = fDeferUpd;
1627 wdh->fAckReq = fAckReq;
1628 wdh->cfFormat = pDdh->cfFormat;
1629 GlobalUnlock(hMem);
1630 }
1631 GlobalUnlock((HGLOBAL)hDdeData);
1632 }
1633
1634 return hMem;
1635 }
1636
1637 /* ================================================================
1638 *
1639 * Server management
1640 *
1641 * ================================================================ */
1642
1643 /******************************************************************
1644 * WDML_AddServer
1645 *
1646 *
1647 */
1648 WDML_SERVER* WDML_AddServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic)
1649 {
1650 static const WCHAR fmtW[] = {'%','s','(','0','x','%','0','8','l','x',')',0};
1651 WDML_SERVER* pServer;
1652 WCHAR buf1[256];
1653 WCHAR buf2[256];
1654
1655 pServer = HeapAlloc(GetProcessHeap(), 0, sizeof(WDML_SERVER));
1656 if (pServer == NULL) return NULL;
1657
1658 pServer->hszService = hszService;
1659 WDML_IncHSZ(pInstance, hszService);
1660
1661 DdeQueryStringW(pInstance->instanceID, hszService, buf1, 256, CP_WINUNICODE);
1662 snprintfW(buf2, 256, fmtW, buf1, GetCurrentProcessId());
1663 pServer->hszServiceSpec = DdeCreateStringHandleW(pInstance->instanceID, buf2, CP_WINUNICODE);
1664
1665 pServer->atomService = WDML_MakeAtomFromHsz(pServer->hszService);
1666 pServer->atomServiceSpec = WDML_MakeAtomFromHsz(pServer->hszServiceSpec);
1667
1668 pServer->filterOn = TRUE;
1669
1670 pServer->next = pInstance->servers;
1671 pInstance->servers = pServer;
1672 return pServer;
1673 }
1674
1675 /******************************************************************
1676 * WDML_RemoveServer
1677 *
1678 *
1679 */
1680 void WDML_RemoveServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic)
1681 {
1682 WDML_SERVER* pPrev = NULL;
1683 WDML_SERVER* pServer = NULL;
1684 WDML_CONV* pConv;
1685 WDML_CONV* pConvNext;
1686
1687 pServer = pInstance->servers;
1688
1689 while (pServer != NULL)
1690 {
1691 if (DdeCmpStringHandles(pServer->hszService, hszService) == 0)
1692 {
1693 WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_UNREGISTER,
1694 pServer->atomService, pServer->atomServiceSpec);
1695 /* terminate all conversations for given topic */
1696 for (pConv = pInstance->convs[WDML_SERVER_SIDE]; pConv != NULL; pConv = pConvNext)
1697 {
1698 pConvNext = pConv->next;
1699 if (DdeCmpStringHandles(pConv->hszService, hszService) == 0)
1700 {
1701 HWND client = pConv->hwndClient, server = pConv->hwndServer;
1702 WDML_RemoveConv(pConv, WDML_SERVER_SIDE);
1703 /* don't care about return code (whether client window is present or not) */
1704 PostMessageW(client, WM_DDE_TERMINATE, (WPARAM)server, 0);
1705 }
1706 }
1707 if (pServer == pInstance->servers)
1708 {
1709 pInstance->servers = pServer->next;
1710 }
1711 else
1712 {
1713 pPrev->next = pServer->next;
1714 }
1715
1716 DestroyWindow(pServer->hwndServer);
1717 WDML_DecHSZ(pInstance, pServer->hszServiceSpec);
1718 WDML_DecHSZ(pInstance, pServer->hszService);
1719
1720 GlobalDeleteAtom(pServer->atomService);
1721 GlobalDeleteAtom(pServer->atomServiceSpec);
1722
1723 HeapFree(GetProcessHeap(), 0, pServer);
1724 break;
1725 }
1726
1727 pPrev = pServer;
1728 pServer = pServer->next;
1729 }
1730 }
1731
1732 /*****************************************************************************
1733 * WDML_FindServer
1734 *
1735 * generic routine to return a pointer to the relevant ServiceNode
1736 * for a given service name, or NULL if the entry does not exist
1737 *
1738 */
1739 WDML_SERVER* WDML_FindServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic)
1740 {
1741 WDML_SERVER* pServer;
1742
1743 for (pServer = pInstance->servers; pServer != NULL; pServer = pServer->next)
1744 {
1745 if (hszService == pServer->hszService)
1746 {
1747 return pServer;
1748 }
1749 }
1750 TRACE("Service name missing\n");
1751 return NULL;
1752 }
1753
1754 /* ================================================================
1755 *
1756 * Conversation management
1757 *
1758 * ================================================================ */
1759
1760 /******************************************************************
1761 * WDML_AddConv
1762 *
1763 *
1764 */
1765 WDML_CONV* WDML_AddConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
1766 HSZ hszService, HSZ hszTopic, HWND hwndClient, HWND hwndServer)
1767 {
1768 WDML_CONV* pConv;
1769
1770 /* no conversation yet, add it */
1771 pConv = HeapAlloc(GetProcessHeap(), 0, sizeof(WDML_CONV));
1772 if (!pConv) return NULL;
1773
1774 pConv->instance = pInstance;
1775 WDML_IncHSZ(pInstance, pConv->hszService = hszService);
1776 WDML_IncHSZ(pInstance, pConv->hszTopic = hszTopic);
1777 pConv->magic = WDML_CONV_MAGIC;
1778 pConv->hwndServer = hwndServer;
1779 pConv->hwndClient = hwndClient;
1780 pConv->transactions = NULL;
1781 pConv->hUser = 0;
1782 pConv->wStatus = (side == WDML_CLIENT_SIDE) ? ST_CLIENT : 0L;
1783 pConv->wStatus |= pInstance->wStatus;
1784 /* check if both side of the conversation are of the same instance */
1785 if (GetWindowThreadProcessId(hwndClient, NULL) == GetWindowThreadProcessId(hwndServer, NULL) &&
1786 WDML_GetInstanceFromWnd(hwndClient) == WDML_GetInstanceFromWnd(hwndServer))
1787 {
1788 pConv->wStatus |= ST_ISSELF;
1789 }
1790 pConv->wConvst = XST_NULL;
1791
1792 pConv->next = pInstance->convs[side];
1793 pInstance->convs[side] = pConv;
1794
1795 TRACE("pConv->wStatus %04x pInstance(%p)\n", pConv->wStatus, pInstance);
1796
1797 return pConv;
1798 }
1799
1800 /******************************************************************
1801 * WDML_FindConv
1802 *
1803 *
1804 */
1805 WDML_CONV* WDML_FindConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
1806 HSZ hszService, HSZ hszTopic)
1807 {
1808 WDML_CONV* pCurrent = NULL;
1809
1810 for (pCurrent = pInstance->convs[side]; pCurrent != NULL; pCurrent = pCurrent->next)
1811 {
1812 if (DdeCmpStringHandles(pCurrent->hszService, hszService) == 0 &&
1813 DdeCmpStringHandles(pCurrent->hszTopic, hszTopic) == 0)
1814 {
1815 return pCurrent;
1816 }
1817
1818 }
1819 return NULL;
1820 }
1821
1822 /******************************************************************
1823 * WDML_RemoveConv
1824 *
1825 *
1826 */
1827 void WDML_RemoveConv(WDML_CONV* pRef, WDML_SIDE side)
1828 {
1829 WDML_CONV* pPrev = NULL;
1830 WDML_CONV* pCurrent;
1831 WDML_XACT* pXAct;
1832 WDML_XACT* pXActNext;
1833 HWND hWnd;
1834
1835 if (!pRef)
1836 return;
1837
1838 /* remove any pending transaction */
1839 for (pXAct = pRef->transactions; pXAct != NULL; pXAct = pXActNext)
1840 {
1841 pXActNext = pXAct->next;
1842 WDML_FreeTransaction(pRef->instance, pXAct, TRUE);
1843 }
1844
1845 WDML_RemoveAllLinks(pRef->instance, pRef, side);
1846
1847 /* FIXME: should we keep the window around ? it seems so (at least on client side
1848 * to let QueryConvInfo work after conv termination, but also to implement
1849 * DdeReconnect...
1850 */
1851 /* destroy conversation window, but first remove pConv from hWnd.
1852 * this would help the wndProc do appropriate handling upon a WM_DESTROY message
1853 */
1854 hWnd = (side == WDML_CLIENT_SIDE) ? pRef->hwndClient : pRef->hwndServer;
1855 SetWindowLongPtrW(hWnd, GWL_WDML_CONVERSATION, 0);
1856
1857 DestroyWindow((side == WDML_CLIENT_SIDE) ? pRef->hwndClient : pRef->hwndServer);
1858
1859 WDML_DecHSZ(pRef->instance, pRef->hszService);
1860 WDML_DecHSZ(pRef->instance, pRef->hszTopic);
1861
1862 for (pCurrent = pRef->instance->convs[side]; pCurrent != NULL; pCurrent = (pPrev = pCurrent)->next)
1863 {
1864 if (pCurrent == pRef)
1865 {
1866 if (pCurrent == pRef->instance->convs[side])
1867 {
1868 pRef->instance->convs[side] = pCurrent->next;
1869 }
1870 else
1871 {
1872 pPrev->next = pCurrent->next;
1873 }
1874 pCurrent->magic = 0;
1875 HeapFree(GetProcessHeap(), 0, pCurrent);
1876 break;
1877 }
1878 }
1879 }
1880
1881 /******************************************************************
1882 * WDML_EnableCallback
1883 */
1884 static BOOL WDML_EnableCallback(WDML_CONV *pConv, UINT wCmd)
1885 {
1886 if (wCmd == EC_DISABLE)
1887 {
1888 pConv->wStatus |= ST_BLOCKED;
1889 TRACE("EC_DISABLE: conv %p status flags %04x\n", pConv, pConv->wStatus);
1890 return TRUE;
1891 }
1892
1893 if (wCmd == EC_QUERYWAITING)
1894 return pConv->transactions ? TRUE : FALSE;
1895
1896 if (wCmd != EC_ENABLEALL && wCmd != EC_ENABLEONE)
1897 {
1898 FIXME("Unknown command code %04x\n", wCmd);
1899 return FALSE;
1900 }
1901
1902 if (wCmd == EC_ENABLEALL)
1903 {
1904 pConv->wStatus &= ~ST_BLOCKED;
1905 TRACE("EC_ENABLEALL: conv %p status flags %04x\n", pConv, pConv->wStatus);
1906 }
1907
1908 while (pConv->transactions)
1909 {
1910 WDML_XACT *pXAct = pConv->transactions;
1911
1912 if (pConv->wStatus & ST_CLIENT)
1913 {
1914 /* transaction should be in the queue until handled */
1915 WDML_ClientHandle(pConv, pXAct, 0, NULL);
1916 WDML_UnQueueTransaction(pConv, pXAct);
1917 }
1918 else
1919 {
1920 /* transaction should be removed from the queue before handling */
1921 WDML_UnQueueTransaction(pConv, pXAct);
1922 WDML_ServerHandle(pConv, pXAct);
1923 }
1924
1925 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1926
1927 if (wCmd == EC_ENABLEONE) break;
1928 }
1929 return TRUE;
1930 }
1931
1932 /*****************************************************************
1933 * DdeEnableCallback (USER32.@)
1934 */
1935 BOOL WINAPI DdeEnableCallback(DWORD idInst, HCONV hConv, UINT wCmd)
1936 {
1937 BOOL ret = FALSE;
1938 WDML_CONV *pConv;
1939
1940 TRACE("(%d, %p, %04x)\n", idInst, hConv, wCmd);
1941
1942 if (hConv)
1943 {
1944 pConv = WDML_GetConv(hConv, TRUE);
1945
1946 if (pConv && pConv->instance->instanceID == idInst)
1947 ret = WDML_EnableCallback(pConv, wCmd);
1948 }
1949 else
1950 {
1951 WDML_INSTANCE *pInstance = WDML_GetInstance(idInst);
1952
1953 if (!pInstance)
1954 return FALSE;
1955
1956 TRACE("adding flags %04x to instance %p\n", wCmd, pInstance);
1957 pInstance->wStatus |= wCmd;
1958
1959 if (wCmd == EC_DISABLE)
1960 {
1961 pInstance->wStatus |= ST_BLOCKED;
1962 TRACE("EC_DISABLE: inst %p status flags %04x\n", pInstance, pInstance->wStatus);
1963 }
1964 else if (wCmd == EC_ENABLEALL)
1965 {
1966 pInstance->wStatus &= ~ST_BLOCKED;
1967 TRACE("EC_ENABLEALL: inst %p status flags %04x\n", pInstance, pInstance->wStatus);
1968 }
1969
1970 ret = TRUE;
1971
1972 for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv != NULL; pConv = pConv->next)
1973 {
1974 ret = WDML_EnableCallback(pConv, wCmd);
1975 if (ret && wCmd == EC_QUERYWAITING) break;
1976 }
1977 }
1978
1979 return ret;
1980 }
1981
1982 /******************************************************************
1983 * WDML_GetConv
1984 *
1985 *
1986 */
1987 WDML_CONV* WDML_GetConv(HCONV hConv, BOOL checkConnected)
1988 {
1989 WDML_CONV* pConv = (WDML_CONV*)hConv;
1990
1991 /* FIXME: should do better checking */
1992 if (pConv == NULL || pConv->magic != WDML_CONV_MAGIC) return NULL;
1993
1994 if (!pConv->instance || pConv->instance->threadID != GetCurrentThreadId())
1995 {
1996 WARN("wrong thread ID\n");
1997 pConv->instance->lastError = DMLERR_INVALIDPARAMETER; /* FIXME: check */
1998 return NULL;
1999 }
2000
2001 if (checkConnected && !(pConv->wStatus & ST_CONNECTED))
2002 {
2003 WARN("found conv but ain't connected\n");
2004 pConv->instance->lastError = DMLERR_NO_CONV_ESTABLISHED;
2005 return NULL;
2006 }
2007
2008 return pConv;
2009 }
2010
2011 /******************************************************************
2012 * WDML_GetConvFromWnd
2013 *
2014 *
2015 */
2016 WDML_CONV* WDML_GetConvFromWnd(HWND hWnd)
2017 {
2018 return (WDML_CONV*)GetWindowLongPtrW(hWnd, GWL_WDML_CONVERSATION);
2019 }
2020
2021 /******************************************************************
2022 * WDML_PostAck
2023 *
2024 *
2025 */
2026 BOOL WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
2027 BOOL fBusy, BOOL fAck, UINT_PTR pmt, LPARAM lParam, UINT oldMsg)
2028 {
2029 DDEACK ddeAck;
2030 HWND from, to;
2031
2032 if (side == WDML_SERVER_SIDE)
2033 {
2034 from = pConv->hwndServer;
2035 to = pConv->hwndClient;
2036 }
2037 else
2038 {
2039 to = pConv->hwndServer;
2040 from = pConv->hwndClient;
2041 }
2042
2043 ddeAck.bAppReturnCode = appRetCode;
2044 ddeAck.reserved = 0;
2045 ddeAck.fBusy = fBusy;
2046 ddeAck.fAck = fAck;
2047
2048 TRACE("Posting a %s ack\n", ddeAck.fAck ? "positive" : "negative");
2049
2050 lParam = (lParam) ? ReuseDDElParam(lParam, oldMsg, WM_DDE_ACK, *(WORD*)&ddeAck, pmt) :
2051 PackDDElParam(WM_DDE_ACK, *(WORD*)&ddeAck, pmt);
2052 if (!PostMessageW(to, WM_DDE_ACK, (WPARAM)from, lParam))
2053 {
2054 pConv->wStatus &= ~ST_CONNECTED;
2055 pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
2056 FreeDDElParam(WM_DDE_ACK, lParam);
2057 return FALSE;
2058 }
2059 return TRUE;
2060 }
2061
2062 /*****************************************************************
2063 * DdeSetUserHandle (USER32.@)
2064 */
2065 BOOL WINAPI DdeSetUserHandle(HCONV hConv, DWORD id, DWORD hUser)
2066 {
2067 WDML_CONV* pConv;
2068
2069 pConv = WDML_GetConv(hConv, FALSE);
2070 if (pConv == NULL)
2071 return FALSE;
2072
2073 if (id == QID_SYNC)
2074 {
2075 pConv->hUser = hUser;
2076 }
2077 else
2078 {
2079 WDML_XACT* pXAct;
2080
2081 pXAct = WDML_FindTransaction(pConv, id);
2082 if (pXAct)
2083 {
2084 pXAct->hUser = hUser;
2085 }
2086 else
2087 {
2088 pConv->instance->lastError = DMLERR_UNFOUND_QUEUE_ID;
2089 return FALSE;
2090 }
2091 }
2092 return TRUE;
2093 }
2094
2095 /******************************************************************
2096 * WDML_GetLocalConvInfo
2097 *
2098 *
2099 */
2100 static BOOL WDML_GetLocalConvInfo(WDML_CONV* pConv, CONVINFO* ci, DWORD id)
2101 {
2102 BOOL ret = TRUE;
2103 WDML_LINK* pLink;
2104 WDML_SIDE side;
2105
2106 ci->hConvPartner = (pConv->wStatus & ST_ISLOCAL) ? (HCONV)((ULONG_PTR)pConv | 1) : 0;
2107 ci->hszSvcPartner = pConv->hszService;
2108 ci->hszServiceReq = pConv->hszService; /* FIXME: they shouldn't be the same, should they ? */
2109 ci->hszTopic = pConv->hszTopic;
2110 ci->wStatus = pConv->wStatus;
2111
2112 side = (pConv->wStatus & ST_CLIENT) ? WDML_CLIENT_SIDE : WDML_SERVER_SIDE;
2113
2114 for (pLink = pConv->instance->links[side]; pLink != NULL; pLink = pLink->next)
2115 {
2116 if (pLink->hConv == (HCONV)pConv)
2117 {
2118 ci->wStatus |= ST_ADVISE;
2119 break;
2120 }
2121 }
2122
2123 /* FIXME: non handled status flags:
2124 ST_BLOCKED
2125 ST_BLOCKNEXT
2126 ST_INLIST
2127 */
2128
2129 ci->wConvst = pConv->wConvst; /* FIXME */
2130
2131 ci->wLastError = 0; /* FIXME: note it's not the instance last error */
2132 ci->hConvList = 0;
2133 ci->ConvCtxt = pConv->convContext;
2134 if (ci->wStatus & ST_CLIENT)
2135 {
2136 ci->hwnd = pConv->hwndClient;
2137 ci->hwndPartner = pConv->hwndServer;
2138 }
2139 else
2140 {
2141 ci->hwnd = pConv->hwndServer;
2142 ci->hwndPartner = pConv->hwndClient;
2143 }
2144 if (id == QID_SYNC)
2145 {
2146 ci->hUser = pConv->hUser;
2147 ci->hszItem = 0;
2148 ci->wFmt = 0;
2149 ci->wType = 0;
2150 }
2151 else
2152 {
2153 WDML_XACT* pXAct;
2154
2155 pXAct = WDML_FindTransaction(pConv, id);
2156 if (pXAct)
2157 {
2158 ci->hUser = pXAct->hUser;
2159 ci->hszItem = pXAct->hszItem;
2160 ci->wFmt = pXAct->wFmt;
2161 ci->wType = pXAct->wType;
2162 }
2163 else
2164 {
2165 ret = 0;
2166 pConv->instance->lastError = DMLERR_UNFOUND_QUEUE_ID;
2167 }
2168 }
2169 return ret;
2170 }
2171
2172 /******************************************************************
2173 * DdeQueryConvInfo (USER32.@)
2174 *
2175 * FIXME: Set last DDE error on failure.
2176 */
2177 UINT WINAPI DdeQueryConvInfo(HCONV hConv, DWORD id, PCONVINFO lpConvInfo)
2178 {
2179 UINT ret = lpConvInfo->cb;
2180 CONVINFO ci;
2181 WDML_CONV* pConv;
2182
2183 TRACE("(%p,%x,%p)\n", hConv, id, lpConvInfo);
2184
2185 if (!hConv)
2186 {
2187 FIXME("hConv is NULL\n");
2188 return 0;
2189 }
2190
2191 pConv = WDML_GetConv(hConv, FALSE);
2192 if (pConv != NULL)
2193 {
2194 if (!WDML_GetLocalConvInfo(pConv, &ci, id))
2195 ret = 0;
2196 }
2197 else
2198 {
2199 if ((ULONG_PTR)hConv & 1)
2200 {
2201 pConv = WDML_GetConv((HCONV)((ULONG_PTR)hConv & ~1), FALSE);
2202 if (pConv != NULL)
2203 FIXME("Request on remote conversation information is not implemented yet\n");
2204 }
2205 ret = 0;
2206 }
2207
2208 if (ret != 0)
2209 memcpy(lpConvInfo, &ci, min((size_t)lpConvInfo->cb, sizeof(ci)));
2210 return ret;
2211 }
2212
2213 /* ================================================================
2214 *
2215 * Link (hot & warm) management
2216 *
2217 * ================================================================ */
2218
2219 /******************************************************************
2220 * WDML_AddLink
2221 *
2222 *
2223 */
2224 void WDML_AddLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
2225 UINT wType, HSZ hszItem, UINT wFmt)
2226 {
2227 WDML_LINK* pLink;
2228
2229 pLink = HeapAlloc(GetProcessHeap(), 0, sizeof(WDML_LINK));
2230 if (pLink == NULL)
2231 {
2232 ERR("OOM\n");
2233 return;
2234 }
2235
2236 pLink->hConv = hConv;
2237 pLink->transactionType = wType;
2238 WDML_IncHSZ(pInstance, pLink->hszItem = hszItem);
2239 pLink->uFmt = wFmt;
2240 pLink->next = pInstance->links[side];
2241 pInstance->links[side] = pLink;
2242 }
2243
2244 /******************************************************************
2245 * WDML_RemoveLink
2246 *
2247 *
2248 */
2249 void WDML_RemoveLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
2250 HSZ hszItem, UINT uFmt)
2251 {
2252 WDML_LINK* pPrev = NULL;
2253 WDML_LINK* pCurrent = NULL;
2254
2255 pCurrent = pInstance->links[side];
2256
2257 while (pCurrent != NULL)
2258 {
2259 if (pCurrent->hConv == hConv &&
2260 DdeCmpStringHandles(pCurrent->hszItem, hszItem) == 0 &&
2261 pCurrent->uFmt == uFmt)
2262 {
2263 if (pCurrent == pInstance->links[side])
2264 {
2265 pInstance->links[side] = pCurrent->next;
2266 }
2267 else
2268 {
2269 pPrev->next = pCurrent->next;
2270 }
2271
2272 WDML_DecHSZ(pInstance, pCurrent->hszItem);
2273 HeapFree(GetProcessHeap(), 0, pCurrent);
2274 break;
2275 }
2276
2277 pPrev = pCurrent;
2278 pCurrent = pCurrent->next;
2279 }
2280 }
2281
2282 /* this function is called to remove all links related to the conv.
2283 It should be called from both client and server when terminating
2284 the conversation.
2285 */
2286 /******************************************************************
2287 * WDML_RemoveAllLinks
2288 *
2289 *
2290 */
2291 void WDML_RemoveAllLinks(WDML_INSTANCE* pInstance, WDML_CONV* pConv, WDML_SIDE side)
2292 {
2293 WDML_LINK* pPrev = NULL;
2294 WDML_LINK* pCurrent = NULL;
2295 WDML_LINK* pNext = NULL;
2296
2297 pCurrent = pInstance->links[side];
2298
2299 while (pCurrent != NULL)
2300 {
2301 if (pCurrent->hConv == (HCONV)pConv)
2302 {
2303 if (pCurrent == pInstance->links[side])
2304 {
2305 pInstance->links[side] = pCurrent->next;
2306 pNext = pCurrent->next;
2307 }
2308 else
2309 {
2310 pPrev->next = pCurrent->next;
2311 pNext = pCurrent->next;
2312 }
2313
2314 WDML_DecHSZ(pInstance, pCurrent->hszItem);
2315
2316 HeapFree(GetProcessHeap(), 0, pCurrent);
2317 pCurrent = NULL;
2318 }
2319
2320 if (pCurrent)
2321 {
2322 pPrev = pCurrent;
2323 pCurrent = pCurrent->next;
2324 }
2325 else
2326 {
2327 pCurrent = pNext;
2328 }
2329 }
2330 }
2331
2332 /******************************************************************
2333 * WDML_FindLink
2334 *
2335 *
2336 */
2337 WDML_LINK* WDML_FindLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
2338 HSZ hszItem, BOOL use_fmt, UINT uFmt)
2339 {
2340 WDML_LINK* pCurrent = NULL;
2341
2342 for (pCurrent = pInstance->links[side]; pCurrent != NULL; pCurrent = pCurrent->next)
2343 {
2344 /* we don't need to check for transaction type as it can be altered */
2345
2346 if (pCurrent->hConv == hConv &&
2347 DdeCmpStringHandles(pCurrent->hszItem, hszItem) == 0 &&
2348 (!use_fmt || pCurrent->uFmt == uFmt))
2349 {
2350 break;
2351 }
2352
2353 }
2354
2355 return pCurrent;
2356 }
2357
2358 /* ================================================================
2359 *
2360 * Transaction management
2361 *
2362 * ================================================================ */
2363
2364 /******************************************************************
2365 * WDML_AllocTransaction
2366 *
2367 * Alloc a transaction structure for handling the message ddeMsg
2368 */
2369 WDML_XACT* WDML_AllocTransaction(WDML_INSTANCE* pInstance, UINT ddeMsg,
2370 UINT wFmt, HSZ hszItem)
2371 {
2372 WDML_XACT* pXAct;
2373 static WORD tid = 1; /* FIXME: wrap around */
2374
2375 pXAct = HeapAlloc(GetProcessHeap(), 0, sizeof(WDML_XACT));
2376 if (!pXAct)
2377 {
2378 pInstance->lastError = DMLERR_MEMORY_ERROR;
2379 return NULL;
2380 }
2381
2382 pXAct->xActID = tid++;
2383 pXAct->ddeMsg = ddeMsg;
2384 pXAct->hDdeData = 0;
2385 pXAct->hUser = 0;
2386 pXAct->next = NULL;
2387 pXAct->wType = 0;
2388 pXAct->wFmt = wFmt;
2389 if ((pXAct->hszItem = hszItem)) WDML_IncHSZ(pInstance, pXAct->hszItem);
2390 pXAct->atom = 0;
2391 pXAct->hMem = 0;
2392 pXAct->lParam = 0;
2393
2394 return pXAct;
2395 }
2396
2397 /******************************************************************
2398 * WDML_QueueTransaction
2399 *
2400 * Adds a transaction to the list of transaction
2401 */
2402 void WDML_QueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct)
2403 {
2404 WDML_XACT** pt;
2405
2406 /* advance to last in queue */
2407 for (pt = &pConv->transactions; *pt != NULL; pt = &(*pt)->next);
2408 *pt = pXAct;
2409 }
2410
2411 /******************************************************************
2412 * WDML_UnQueueTransaction
2413 *
2414 *
2415 */
2416 BOOL WDML_UnQueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct)
2417 {
2418 WDML_XACT** pt;
2419
2420 for (pt = &pConv->transactions; *pt; pt = &(*pt)->next)
2421 {
2422 if (*pt == pXAct)
2423 {
2424 *pt = pXAct->next;
2425 return TRUE;
2426 }
2427 }
2428 return FALSE;
2429 }
2430
2431 /******************************************************************
2432 * WDML_FreeTransaction
2433 *
2434 *
2435 */
2436 void WDML_FreeTransaction(WDML_INSTANCE* pInstance, WDML_XACT* pXAct, BOOL doFreePmt)
2437 {
2438 /* free pmt(s) in pXAct too. check against one for not deleting TRUE return values */
2439 if (doFreePmt && (ULONG_PTR)pXAct->hMem > 1)
2440 {
2441 GlobalFree(pXAct->hMem);
2442 }
2443 if (pXAct->hszItem) WDML_DecHSZ(pInstance, pXAct->hszItem);
2444
2445 HeapFree(GetProcessHeap(), 0, pXAct);
2446 }
2447
2448 /******************************************************************
2449 * WDML_FindTransaction
2450 *
2451 *
2452 */
2453 WDML_XACT* WDML_FindTransaction(WDML_CONV* pConv, DWORD tid)
2454 {
2455 WDML_XACT* pXAct;
2456
2457 tid = HIWORD(tid);
2458 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
2459 {
2460 if (pXAct->xActID == tid)
2461 break;
2462 }
2463 return pXAct;
2464 }
2465
2466 /* ================================================================
2467 *
2468 * Information broadcast across DDEML implementations
2469 *
2470 * ================================================================ */
2471
2472 struct tagWDML_BroadcastPmt
2473 {
2474 LPCWSTR clsName;
2475 UINT uMsg;
2476 WPARAM wParam;
2477 LPARAM lParam;
2478 };
2479
2480 /******************************************************************
2481 * WDML_BroadcastEnumProc
2482 *
2483 *
2484 */
2485 static BOOL CALLBACK WDML_BroadcastEnumProc(HWND hWnd, LPARAM lParam)
2486 {
2487 struct tagWDML_BroadcastPmt* s = (struct tagWDML_BroadcastPmt*)lParam;
2488 WCHAR buffer[128];
2489
2490 if (GetClassNameW(hWnd, buffer, 128) > 0 &&
2491 lstrcmpiW(buffer, s->clsName) == 0)
2492 {
2493 PostMessageW(hWnd, s->uMsg, s->wParam, s->lParam);
2494 }
2495 return TRUE;
2496 }
2497
2498 /******************************************************************
2499 * WDML_BroadcastDDEWindows
2500 *
2501 *
2502 */
2503 void WDML_BroadcastDDEWindows(LPCWSTR clsName, UINT uMsg, WPARAM wParam, LPARAM lParam)
2504 {
2505 struct tagWDML_BroadcastPmt s;
2506
2507 s.clsName = clsName;
2508 s.uMsg = uMsg;
2509 s.wParam = wParam;
2510 s.lParam = lParam;
2511 EnumWindows(WDML_BroadcastEnumProc, (LPARAM)&s);
2512 }
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