/***************************************************************************\
* 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);
}
/***************************************************************************\
* 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);
}
/***************************************************************************\
* 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);
}
/***************************************************************************\
* 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);
}
