/***************************************************************************\
* DdeFreeStringHandle (DDEML API)
*
* Description:
* Decrement the use count of an HSZ.
*
* History:
* 11-1-91 sanfords Created.
\***************************************************************************/
BOOL DdeFreeStringHandle(
DWORD idInst,
HSZ hsz)
{
PCL_INSTANCE_INFO pcii;
BOOL fRet = FALSE;
EnterDDECrit;
pcii = ValidateInstance((HANDLE)LongToHandle( idInst ));
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (ValidateHSZ(hsz) == HSZT_INVALID) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
MONHSZ(pcii, hsz, MH_DELETE);
fRet = TRUE;
if (LATOM_FROM_HSZ(hsz) != 0) {
if (DeleteAtom(LATOM_FROM_HSZ(hsz))) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
fRet = FALSE;
}
}
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeKeepStringHandle (DDEML API)
*
* Description:
* Increments the use count of an HSZ.
*
* History:
* 11-1-91 sanfords Created.
\***************************************************************************/
BOOL DdeKeepStringHandle(
DWORD idInst,
HSZ hsz)
{
PCL_INSTANCE_INFO pcii;
BOOL fRet = FALSE;
EnterDDECrit;
pcii = ValidateInstance((HANDLE)LongToHandle( idInst ));
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (ValidateHSZ(hsz) == HSZT_INVALID) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (LATOM_FROM_HSZ(hsz) == 0) {
fRet = TRUE;
goto Exit;
}
MONHSZ(pcii, hsz, MH_KEEP);
fRet = IncLocalAtomCount(LATOM_FROM_HSZ(hsz)) ? TRUE : FALSE;
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeConnect (DDEML API)
*
* Description:
* Initiates a DDE conversation.
*
* History:
* 11-1-91 sanfords Created.
\***************************************************************************/
HCONV DdeConnect(
DWORD idInst,
HSZ hszService,
HSZ hszTopic,
PCONVCONTEXT pCC)
{
PCL_INSTANCE_INFO pcii;
PCL_CONV_INFO pci;
HCONV hConvRet = 0;
HWND hwndTarget = 0;
LATOM aNormalSvcName = 0;
EnterDDECrit;
if (!ValidateConnectParameters((HANDLE)idInst, &pcii, &hszService, hszTopic,
&aNormalSvcName, &pCC, &hwndTarget, 0)) {
goto Exit;
}
pci = ConnectConv(pcii, LATOM_FROM_HSZ(hszService), LATOM_FROM_HSZ(hszTopic),
hwndTarget,
(pcii->afCmd & CBF_FAIL_SELFCONNECTIONS) ? pcii->hwndMother : 0,
pCC, 0, CLST_SINGLE_INITIALIZING);
if (pci == NULL) {
SetLastDDEMLError(pcii, DMLERR_NO_CONV_ESTABLISHED);
goto Exit;
} else {
hConvRet = pci->ci.hConv;
}
Exit:
if (aNormalSvcName) {
GlobalDeleteAtom(aNormalSvcName);
}
LeaveDDECrit;
return (hConvRet);
}
/***************************************************************************\
* DdeNameService (DDEML API)
*
* Description:
* Registers, and Unregisters service names and sets the Initiate filter
* state for an instance.
*
* History:
* 11-1-91 sanfords Created.
\***************************************************************************/
HDDEDATA DdeNameService(
DWORD idInst,
HSZ hsz1, // service name
HSZ hsz2, // reserved for future enhancements
UINT afCmd) // DNS_ flags.
{
BOOL fRet = TRUE;
LATOM *plaNameService;
PCL_INSTANCE_INFO pcii;
EnterDDECrit;
pcii = ValidateInstance((HANDLE)LongToHandle( idInst ));
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
fRet = FALSE;
goto Exit;
}
if ((hsz1 && ValidateHSZ(hsz1) == HSZT_INVALID) || hsz2 != 0) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
fRet = FALSE;
goto Exit;
}
if (afCmd & DNS_FILTERON && !(pcii->afCmd & APPCMD_FILTERINITS)) {
pcii->afCmd |= APPCMD_FILTERINITS;
NtUserUpdateInstance(pcii->hInstServer, &pcii->MonitorFlags, pcii->afCmd);
}
if (afCmd & DNS_FILTEROFF && (pcii->afCmd & APPCMD_FILTERINITS)) {
pcii->afCmd &= ~APPCMD_FILTERINITS;
NtUserUpdateInstance(pcii->hInstServer, &pcii->MonitorFlags, pcii->afCmd);
}
if (afCmd & (DNS_REGISTER | DNS_UNREGISTER)) {
GATOM ga;
if (pcii->afCmd & APPCMD_CLIENTONLY) {
SetLastDDEMLError(pcii, DMLERR_DLL_USAGE);
fRet = FALSE;
goto Exit;
}
if (hsz1 == 0) {
if (afCmd & DNS_REGISTER) {
/*
* registering NULL is not allowed!
*/
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
fRet = FALSE;
goto Exit;
}
/*
* unregistering NULL is just like unregistering each
* registered name.
*
* 10/19/90 - made this a synchronous event so that hsz
* can be freed by calling app after this call completes
* without us having to keep a copy around forever.
*/
plaNameService = pcii->plaNameService;
while (*plaNameService != 0) {
ga = LocalToGlobalAtom(*plaNameService);
DeleteAtom(*plaNameService);
LeaveDDECrit;
RegisterService(FALSE, ga, pcii->hwndMother);
EnterDDECrit;
GlobalDeleteAtom(ga);
plaNameService++;
}
pcii->cNameServiceAlloc = 1;
*pcii->plaNameService = 0;
goto Exit;
}
if (afCmd & DNS_REGISTER) {
plaNameService = (LATOM *)DDEMLReAlloc(pcii->plaNameService,
sizeof(LATOM) * ++pcii->cNameServiceAlloc);
if (plaNameService == NULL) {
SetLastDDEMLError(pcii, DMLERR_MEMORY_ERROR);
pcii->cNameServiceAlloc--;
fRet = FALSE;
goto Exit;
} else {
pcii->plaNameService = plaNameService;
}
IncLocalAtomCount(LATOM_FROM_HSZ(hsz1)); // NameService copy
plaNameService[pcii->cNameServiceAlloc - 2] = LATOM_FROM_HSZ(hsz1);
plaNameService[pcii->cNameServiceAlloc - 1] = 0;
} else { // DNS_UNREGISTER
plaNameService = pcii->plaNameService;
while (*plaNameService != 0 && *plaNameService != LATOM_FROM_HSZ(hsz1)) {
plaNameService++;
}
if (*plaNameService == 0) {
goto Exit; // not found just exit
}
//
// fill empty slot with last entry and fill last entry with 0
//
pcii->cNameServiceAlloc--;
*plaNameService = pcii->plaNameService[pcii->cNameServiceAlloc - 1];
pcii->plaNameService[pcii->cNameServiceAlloc - 1] = 0;
}
ga = LocalToGlobalAtom(LATOM_FROM_HSZ(hsz1));
LeaveDDECrit;
RegisterService((afCmd & DNS_REGISTER) ? TRUE : FALSE, ga,
pcii->hwndMother);
EnterDDECrit;
GlobalDeleteAtom(ga);
}
Exit:
LeaveDDECrit;
return ((HDDEDATA)IntToPtr( fRet ));
}
DWORD InternalDdeQueryString(
DWORD idInst,
HSZ hsz,
PVOID psz,
DWORD cbMax,
INT iCodePage)
{
PCL_INSTANCE_INFO pcii;
DWORD dwRet = 0;
WCHAR szw[256];
// BOOL fDefUsed; // LATER
EnterDDECrit;
pcii = ValidateInstance((HANDLE)LongToHandle( idInst ));
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (ValidateHSZ(hsz) == HSZT_INVALID) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (LATOM_FROM_HSZ(hsz) == 0) {
if (iCodePage == CP_WINUNICODE) {
if (psz != NULL) {
*(LPWSTR)psz = L'\0';
}
dwRet = sizeof(WCHAR);
goto Exit;
} else {
if (psz != NULL) {
*(LPSTR)psz = '\0';
}
dwRet = sizeof(CHAR);
goto Exit;
}
}
if (psz == NULL) {
cbMax = sizeof(szw);
psz = (PVOID)szw;
}
switch (iCodePage) {
case CP_WINANSI:
dwRet = GetAtomNameA(LATOM_FROM_HSZ(hsz), psz, cbMax);
break;
default:
dwRet = GetAtomNameW(LATOM_FROM_HSZ(hsz), (LPWSTR)psz, cbMax / sizeof(WCHAR));
if (iCodePage != CP_WINUNICODE) {
/*
* convert psz to the appropriate codepage and count the
* characters(ie BYTES for DBCS!) to alter dwRet.
*/
#ifdef LATER
// Does this routine work in place? (i.e. input and output buffer the same).
WideCharToMultiByte((UINT)iCodePage, 0, szw,
sizeof(szw) / sizeof(WCHAR),
(LPSTR)psz, cbMax, NULL, &fDefUsed);
#endif
dwRet = cbMax + 1;
}
break;
}
Exit:
LeaveDDECrit;
return (dwRet);
}
/***************************************************************************\
* DdeEnableCallback (DDEML API)
*
* Description:
* Turns on and off asynchronous callbacks (BLOCKABLE).
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
BOOL DdeEnableCallback(
DWORD idInst,
HCONV hConv,
UINT wCmd)
{
BOOL fRet = FALSE;
PCL_INSTANCE_INFO pcii;
PCONV_INFO pcoi;
ENABLE_ENUM_STRUCT ees;
EnterDDECrit;
pcii = (PCL_INSTANCE_INFO)ValidateInstance((HANDLE)idInst);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
switch (wCmd) {
case EC_QUERYWAITING:
case EC_DISABLE:
case EC_ENABLEONE:
case EC_ENABLEALL:
break;
default:
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (hConv) {
pcoi = (PCONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_CLIENT_CONVERSATION, InstFromHandle(idInst));
if (pcoi == NULL) {
pcoi = (PCONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_SERVER_CONVERSATION, InstFromHandle(idInst));
}
if (pcoi == NULL) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
pcoi->cLocks++;
fRet = SetEnableState(pcoi, wCmd);
switch (wCmd) {
case EC_ENABLEALL:
case EC_ENABLEONE:
CheckForQueuedMessages(pcoi);
}
pcoi->cLocks--;
if (pcoi->cLocks == 0 && pcoi->state & ST_FREE_CONV_RES_NOW) {
FreeConversationResources(pcoi);
}
} else {
if (wCmd == EC_ENABLEONE) {
wCmd = EC_ENABLEONEOFALL;
}
switch (wCmd) {
case EC_ENABLEONEOFALL:
pcii->ConvStartupState = ST_BLOCKNEXT | ST_BLOCKALLNEXT;
break;
case EC_DISABLE:
pcii->ConvStartupState = ST_BLOCKED;
break;
case EC_ENABLEALL:
pcii->ConvStartupState = 0;
break;
}
ees.pfRet = &fRet;
ees.wCmd = wCmd;
switch (wCmd) {
case EC_ENABLEALL:
ees.wCmd2 = EC_CHECKQUEUE;
break;
case EC_ENABLEONEOFALL:
ees.wCmd2 = EC_CHECKQUEUEONCE;
break;
default:
ees.wCmd2 = 0;
}
EnumChildWindows(pcii->hwndMother, (WNDENUMPROC)EnableEnumProc,
(LONG)&ees);
}
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeQueryNextServer (DDEML API)
*
* Description:
* Enumerates conversations within a list.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
HCONV DdeQueryNextServer(
HCONVLIST hConvList,
HCONV hConvPrev)
{
HCONV hConvRet = 0;
PCONVLIST pcl;
HWND *phwnd;
int i;
PCL_CONV_INFO pci;
PCL_INSTANCE_INFO pcii;
EnterDDECrit;
pcl = (PCONVLIST)ValidateCHandle((HANDLE)hConvList,
HTYPE_CONVERSATION_LIST, HINST_ANY);
if (pcl == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (!pcl->chwnd) { // empty list
goto Exit;
}
pcii = PciiFromHandle((HANDLE)hConvList);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pcii->LastError = DMLERR_NO_ERROR;
do {
hConvRet = 0;
if (hConvPrev == 0) {
pci = (PCL_CONV_INFO)GetWindowLong(pcl->ahwnd[0], GWL_PCI);
if (pci == NULL) {
goto Exit; // Must have all conversations zombied.
}
hConvPrev = hConvRet = pci->ci.hConv;
continue;
}
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConvPrev,
HTYPE_CLIENT_CONVERSATION, InstFromHandle(hConvList));
if (pci == NULL) {
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConvPrev,
HTYPE_ZOMBIE_CONVERSATION, InstFromHandle(hConvList));
if (pci == NULL) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
break;
} else {
goto ZombieSkip;
}
}
if (pci->hConvList != hConvList) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
break;
}
ZombieSkip:
if (pci->ci.next == NULL) {
/*
* end of list for this window, go to next window
*/
for (phwnd = pcl->ahwnd, i = 0; (i + 1) < pcl->chwnd; i++) {
if (phwnd[i] == pci->ci.hwndConv) {
pci = (PCL_CONV_INFO)GetWindowLong(phwnd[i + 1], GWL_PCI);
if (pci == NULL) {
break;
}
hConvPrev = hConvRet = pci->ci.hConv;
break;
}
}
} else {
hConvPrev = hConvRet = pci->ci.next->hConv; // next conv for this window.
}
} while (hConvRet && TypeFromHandle(hConvRet) == HTYPE_ZOMBIE_CONVERSATION);
Exit:
LeaveDDECrit;
return (hConvRet);
}
/***************************************************************************\
* ConnectConv
*
* Description:
* Work function for all Connect cases.
*
* Method:
*
* To reduce the number of windows we use and to simplify how client
* windows handle multiple WM_DDE_ACK messages during initiation, a
* single client window can handle many conversations, each with
* a different server window.
*
* The client window is created and set to a initiation state via the
* GWL_CONVSTATE window word. Initiates are then sent to enumerated server
* window candidates.
* The GWL_CONVSTATE value is used by the DDEML mother windows
* to determine if only one or several ACKs are desired to minimize
* unnessary message traffic.
*
* The client window GWL_CONVCONTEXT? window words are also used by
* Event Windows to pass context information.
*
* Note that all client and server windows are children of the mother
* window. This reduces the number of top level windows that
* WM_DDE_INITIATES need to hit.
*
* Each WM_DDE_ACK that is received by a client window while in the
* initiation state causes it to create a CL_CONV_INFO structure,
* partially initialize it, and link it into its list of CL_CONV_INFO
* structures. The head of the list is pointed to by the GWL_PCI
* client window word.
*
* After each WM_DDE_INITIALIZE is sent, the GWL_PCI value is checked
* to see if it exists and needs initialization to be completed. If
* this is the case the init code knows that at least one ACK was
* received in response to the WM_DDE_INITIALIZE send. The
* initialization of each CL_CONV_INFO struct that needs it is then completed.
*
* Once the broadcasting of WM_DDE_INITIALIZE is done, the init code
* then sets the GWL_CONVSTATE value in the client window to indicate that
* initialization is complete.
*
* Returns:
* The head pci to the client window or NULL if no connections made it.
*
* History:
* 11-1-91 sanfords Created.
\***************************************************************************/
PCL_CONV_INFO ConnectConv(
PCL_INSTANCE_INFO pcii,
LATOM laService,
LATOM laTopic,
HWND hwndTarget, // 0 implies broadcast
HWND hwndSkip, // 0 implies no skips - avoids self-connections.
PCONVCONTEXT pCC,
HCONVLIST hConvList,
DWORD clst)
{
INIT_ENUM ie;
PCL_CONV_INFO pci;
PCONV_INFO pcoi;
GATOM gaService, gaTopic;
CheckDDECritIn;
if (hwndTarget && hwndTarget == hwndSkip) {
return(NULL);
}
LeaveDDECrit;
CheckDDECritOut;
if (pcii->flags & IIF_UNICODE) {
ie.hwndClient = CreateWindowW((LPWSTR)(gpsi->atomSysClass[ICLS_DDEMLCLIENTW]),
L"",
WS_CHILD,
0, 0, 0, 0,
pcii->hwndMother,
(HMENU)0,
(HANDLE)0,
(LPVOID)NULL);
} else {
ie.hwndClient = CreateWindowA((LPSTR)(gpsi->atomSysClass[ICLS_DDEMLCLIENTA]),
"",
WS_CHILD,
0, 0, 0, 0,
pcii->hwndMother,
(HMENU)0,
(HANDLE)0,
(LPVOID)NULL);
}
EnterDDECrit;
if (ie.hwndClient == 0) {
return (NULL);
}
if (pCC != NULL) {
if (!NtUserDdeSetQualityOfService(ie.hwndClient, &(pCC->qos), NULL)) {
SetLastDDEMLError(pcii, DMLERR_MEMORY_ERROR);
goto Error;
}
}
/*
* Note that a pci will be created and allocated for each ACK recieved.
*/
SetConvContext(ie.hwndClient, (LONG *)pCC);
SetWindowLong(ie.hwndClient, GWL_CONVSTATE, clst);
SetWindowLong(ie.hwndClient, GWL_SHINST, (LONG)pcii->hInstServer);
SetWindowLong(ie.hwndClient, GWL_CHINST, (LONG)pcii->hInstClient);
gaService = LocalToGlobalAtom(laService);
gaTopic = LocalToGlobalAtom(laTopic);
ie.lParam = MAKELONG(gaService, gaTopic);
if (!hwndTarget) {
ie.hwndSkip = hwndSkip;
ie.laServiceRequested = laService;
ie.laTopic = laTopic;
ie.hConvList = hConvList;
ie.clst = clst;
}
LeaveDDECrit;
if (hwndTarget) {
SendMessage(hwndTarget, WM_DDE_INITIATE, (DWORD)ie.hwndClient,
ie.lParam);
} else {
/*
* Send this message to the nddeagnt app first so it can start
* the netdde services BEFORE we do an enumeration of windows.
* This lets things work the first time. NetDDEAgent caches
* service status so this is the fastest way to do this.
*/
HWND hwndAgent = FindWindowW(SZ_NDDEAGNT_CLASS, SZ_NDDEAGNT_TITLE);
if (hwndAgent) {
SendMessage(hwndAgent,
WM_DDE_INITIATE, (WPARAM)ie.hwndClient, ie.lParam);
}
EnumWindows((WNDENUMPROC)InitiateEnumerationProc, (LONG)&ie);
}
EnterDDECrit;
/*
* hConvList may have been destroyed during the enumeration but we are
* done with it now so no need to revalidate.
*/
#ifdef DEBUG
{
WCHAR sz[10];
if (gaService && GlobalGetAtomName(gaService, sz, 10) == 0) {
RIPMSG1(RIP_ERROR, "Bad Service Atom after Initiate phase: %lX", (DWORD)gaService);
}
if (gaTopic && GlobalGetAtomName(gaTopic, sz, 10) == 0) {
RIPMSG1(RIP_ERROR, "Bad Topic Atom after Initiate phase: %lX", (DWORD)gaTopic);
}
}
#endif // DEBUG
GlobalDeleteAtom(gaService);
GlobalDeleteAtom(gaTopic);
//
// Get the first pci allocated when a WM_DDE_ACK was recieved.
//
pci = (PCL_CONV_INFO)GetWindowLong(ie.hwndClient, GWL_PCI);
if (pci == NULL) {
Error:
LeaveDDECrit;
NtUserDestroyWindow(ie.hwndClient);
EnterDDECrit;
return (NULL);
}
SetWindowLong(ie.hwndClient, GWL_CONVSTATE, CLST_CONNECTED);
if (hwndTarget) {
/*
* If hwndTarget was NULL, the enumeration proc took care of this.
*/
pci->hwndReconnect = hwndTarget;
UserAssert(pci->ci.next == NULL);
pci->ci.laServiceRequested = laService;
IncLocalAtomCount(laService); // pci copy
}
if (pcii->MonitorFlags & MF_CONV) {
for (pcoi = (PCONV_INFO)pci; pcoi; pcoi = pcoi->next) {
MONCONV(pcoi, TRUE);
}
}
return (pci);
}
/***************************************************************************\
* ValidateConnectParameters
*
* Description:
* worker function to handle common validation code.
*
* Note that paNormalSvcName is set to the atom value created upon extracting
* a normal HSZ from an InstanceSpecific HSZ.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
BOOL ValidateConnectParameters(
HANDLE hInst,
PCL_INSTANCE_INFO *ppcii, // set if valid hInst
HSZ *phszService, // altered if InstSpecific HSZ
HSZ hszTopic,
LATOM *plaNormalSvcName, // set to atom that needs freeing when done
PCONVCONTEXT *ppCC, // set to point to DefConvContext if NULL
HWND *phwndTarget, // set if hszService is InstSpecific
HCONVLIST hConvList)
{
DWORD hszType;
BOOL fError = FALSE;
*ppcii = ValidateInstance(hInst);
if (*ppcii == NULL) {
return (FALSE);
}
hszType = ValidateHSZ(*phszService);
if (hszType == HSZT_INVALID || ValidateHSZ(hszTopic) == HSZT_INVALID) {
SetLastDDEMLError(*ppcii, DMLERR_INVALIDPARAMETER);
return (FALSE);
}
if (hszType == HSZT_INST_SPECIFIC) {
*phwndTarget = ParseInstSpecificAtom(LATOM_FROM_HSZ(*phszService),
plaNormalSvcName);
if (*plaNormalSvcName == 0) {
SetLastDDEMLError(*ppcii, DMLERR_SYS_ERROR);
return (FALSE);
}
*phszService = NORMAL_HSZ_FROM_LATOM(*plaNormalSvcName);
}
if (*ppCC == NULL) {
*ppCC = &DefConvContext;
if ((*ppcii)->flags & IIF_UNICODE) {
(*ppCC)->iCodePage = CP_WINUNICODE;
} else {
(*ppCC)->iCodePage = CP_WINANSI;
}
} else try {
if ((*ppCC)->cb > sizeof(CONVCONTEXT)) {
SetLastDDEMLError(*ppcii, DMLERR_INVALIDPARAMETER);
fError = TRUE;
} else if ((*ppCC)->cb < sizeof(CONVCONTEXT)) {
TempConvContext = DefConvContext;
/*
* we can use this static temp because we are synchronized.
*/
RtlCopyMemory(&TempConvContext, *ppCC, (*ppCC)->cb);
*ppCC = &TempConvContext;
}
} except(EXCEPTION_EXECUTE_HANDLER) {
SetLastDDEMLError(*ppcii, DMLERR_INVALIDPARAMETER);
fError = TRUE;
}
if (fError) {
return(FALSE);
}
if (hConvList != 0 &&
!ValidateCHandle((HANDLE)hConvList, HTYPE_CONVERSATION_LIST,
(DWORD)InstFromHandle((*ppcii)->hInstClient))) {
return (FALSE);
}
return (TRUE);
}
/***************************************************************************\
* DdeReconnect (DDEML API)
*
* Description:
* Attempts to reconnect an externally (from the server) terminated
* client side conversation.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
HCONV DdeReconnect(
HCONV hConv)
{
PCL_INSTANCE_INFO pcii;
PCL_CONV_INFO pci, pciNew;
HCONV hConvRet = 0;
CONVCONTEXT cc;
EnterDDECrit;
pcii = PciiFromHandle((HANDLE)hConv);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_CLIENT_CONVERSATION, HINST_ANY);
if (pci == NULL) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (pci->ci.state & ST_CONNECTED) {
goto Exit;
}
GetConvContext(pci->ci.hwndConv, (LONG *)&cc);
pciNew = ConnectConv(pcii, pci->ci.laService, pci->ci.laTopic,
pci->hwndReconnect, 0, &cc, 0, CLST_SINGLE_INITIALIZING);
if (pciNew == NULL) {
SetLastDDEMLError(pcii, DMLERR_NO_CONV_ESTABLISHED);
goto Exit;
} else {
hConvRet = pciNew->ci.hConv;
if (pci->ci.cLinks) {
PXACT_INFO pxi;
int iLink;
PADVISE_LINK paLink;
/*
* reestablish advise links
*/
for (paLink = pci->ci.aLinks, iLink = pci->ci.cLinks;
iLink; paLink++, iLink--) {
pxi = (PXACT_INFO)DDEMLAlloc(sizeof(XACT_INFO));
if (pxi == NULL) {
break; // abort relinking
}
pxi->pcoi = (PCONV_INFO)pciNew;
pxi->gaItem = LocalToGlobalAtom(paLink->laItem); // pxi copy
pxi->wFmt = paLink->wFmt;
pxi->wType = (WORD)((paLink->wType >> 12) | XTYP_ADVSTART);
if (ClStartAdvise(pxi)) {
pxi->flags |= XIF_ABANDONED;
} else {
GlobalDeleteAtom(pxi->gaItem);
DDEMLFree(pxi);
}
}
}
}
/***************************************************************************\
* DdeConnectList (DDEML API)
*
* Description:
* Initiates DDE conversations with multiple servers or adds unique servers
* to an existing conversation list.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
HCONVLIST DdeConnectList(
DWORD idInst,
HSZ hszService,
HSZ hszTopic,
HCONVLIST hConvList,
PCONVCONTEXT pCC)
{
PCL_INSTANCE_INFO pcii;
PCONV_INFO pcoi, pcoiNew, pcoiExisting, pcoiNext;
HCONVLIST hConvListRet = 0;
HWND hwndTarget = 0;
LATOM aNormalSvcName = 0;
PCONVLIST pcl = NULL;
HCONVLIST hConvListOld;
int i;
CheckDDECritOut;
EnterDDECrit;
if (!ValidateConnectParameters((HANDLE)idInst, &pcii, &hszService, hszTopic,
&aNormalSvcName, &pCC, &hwndTarget, hConvList)) {
goto Exit;
}
ValidateConvList(hConvList);
hConvListOld = hConvList;
pcoi = (PCONV_INFO)ConnectConv(pcii,
LATOM_FROM_HSZ(hszService),
LATOM_FROM_HSZ(hszTopic),
hwndTarget,
(pcii->afCmd & (CBF_FAIL_SELFCONNECTIONS | CBF_FAIL_CONNECTIONS)) ?
pcii->hwndMother : 0,
pCC,
hConvListOld,
CLST_MULT_INITIALIZING);
if (pcoi == NULL) {
/*
* no new connections made
*/
SetLastDDEMLError(pcii, DMLERR_NO_CONV_ESTABLISHED);
hConvListRet = hConvListOld;
goto Exit;
}
/*
* allocate or reallocate the hConvList hwnd list for later addition
* If we already have a valid list, reuse the handle so we don't have
* to alter the preexisting pcoi->hConvList values.
*/
if (hConvListOld == 0) {
pcl = (PCONVLIST)DDEMLAlloc(sizeof(CONVLIST));
if (pcl == NULL) {
SetLastDDEMLError(pcii, DMLERR_MEMORY_ERROR);
DisconnectConv(pcoi);
goto Exit;
}
// pcl->chwnd = 0; LPTR zero inits.
hConvList = (HCONVLIST)CreateHandle((DWORD)pcl,
HTYPE_CONVERSATION_LIST, InstFromHandle(pcii->hInstClient));
if (hConvList == 0) {
DDEMLFree(pcl);
SetLastDDEMLError(pcii, DMLERR_MEMORY_ERROR);
DisconnectConv(pcoi);
goto Exit;
}
} else {
pcl = (PCONVLIST)GetHandleData((HANDLE)hConvList);
pcl = DDEMLReAlloc(pcl, sizeof(CONVLIST) + sizeof(HWND) * pcl->chwnd);
if (pcl == NULL) {
SetLastDDEMLError(pcii, DMLERR_MEMORY_ERROR);
hConvListRet = hConvListOld;
DisconnectConv(pcoi);
goto Exit;
}
SetHandleData((HANDLE)hConvList, (DWORD)pcl);
}
ValidateConvList(hConvListOld);
if (hConvListOld) {
/*
* remove duplicates from new conversations
*
* Although we tried to prevent duplicates from happening
* within the initiate enumeration code, wild initiates or
* servers responding with different service names than
* requested could cause duplicates.
*/
/* For each client window... */
for (i = 0; i < pcl->chwnd; i++) {
/* For each existing conversation in that window... */
for (pcoiExisting = (PCONV_INFO)
GetWindowLong(pcl->ahwnd[i], GWL_PCI);
pcoi != NULL && pcoiExisting != NULL;
pcoiExisting = pcoiExisting->next) {
if (!(pcoiExisting->state & ST_CONNECTED))
continue;
/* For each new conversation... */
for (pcoiNew = pcoi; pcoiNew != NULL; pcoiNew = pcoiNext) {
pcoiNext = pcoiNew->next;
/* see if the new conversation duplicates the existing one */
if (!(pcoiNew->state & ST_CONNECTED))
continue;
UserAssert(((PCL_CONV_INFO)pcoiExisting)->hwndReconnect);
UserAssert(((PCL_CONV_INFO)pcoiNew)->hwndReconnect);
if (((PCL_CONV_INFO)pcoiExisting)->hwndReconnect ==
((PCL_CONV_INFO)pcoiNew)->hwndReconnect &&
pcoiExisting->laTopic == pcoiNew->laTopic &&
pcoiExisting->laService == pcoiNew->laService) {
/*
* duplicate conversation - disconnection causes an unlink
*/
if (pcoiNew == pcoi) {
/*
* We are freeing up the head of the list,
* Reset the head to the next guy.
*/
pcoi = pcoiNext;
}
ValidateConvList(hConvList);
ShutdownConversation(pcoiNew, FALSE);
ValidateConvList(hConvList);
break;
}
}
}
}
for (pcoiExisting = pcoi; pcoiExisting != NULL; pcoiExisting = pcoiExisting->next) {
/*
* if these are all zombies - we DONT want to link it in!
* This is possible because ShutdownConversation() leaves the critical section
* and could allow responding terminates to come through.
*/
if (pcoiExisting->state & ST_CONNECTED) {
goto FoundOne;
}
}
pcoi = NULL; // abandon this guy - he will clean up in time.
FoundOne:
/*
* add new pcoi (if any are left) hwnd to ConvList hwnd list.
*/
if (pcoi != NULL) {
UserAssert(pcoi->hwndConv);
pcl->ahwnd[pcl->chwnd] = pcoi->hwndConv;
pcl->chwnd++;
hConvListRet = hConvList;
} else {
hConvListRet = hConvListOld;
if (!hConvListOld) {
DestroyHandle((HANDLE)hConvList);
}
}
} else { // no hConvListOld
UserAssert(pcoi->hwndConv);
pcl->ahwnd[0] = pcoi->hwndConv;
pcl->chwnd = 1;
hConvListRet = hConvList;
}
if (pcoi != NULL) {
/*
* set hConvList field for all remaining new conversations.
*/
UserAssert(hConvListRet);
for (pcoiNew = pcoi; pcoiNew != NULL; pcoiNew = pcoiNew->next) {
if (pcoiNew->state & ST_CONNECTED) {
((PCL_CONV_INFO)pcoiNew)->hConvList = hConvListRet;
}
}
}
Exit:
if (aNormalSvcName) {
DeleteAtom(aNormalSvcName);
}
ValidateConvList(hConvListRet);
LeaveDDECrit;
return (hConvListRet);
}
