// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "dde.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#include "wx/msw/private.h"
#include <string.h>
-#include <windows.h>
#include <ddeml.h>
-#ifdef __GNUWIN32_OLD__
- #include "wx/msw/gnuwin32/extra.h"
-#endif
-
-// some compilers headers don't define this one (mingw32)
-#ifndef DMLERR_NO_ERROR
- #define DMLERR_NO_ERROR (0)
-
- // this one is also missing from some mingw32 headers, but there is no way
- // to test for it (I know of) - the test for DMLERR_NO_ERROR works for me,
- // but is surely not the right thing to do
- extern "C"
- HDDEDATA STDCALL DdeClientTransaction(LPBYTE pData,
- DWORD cbData,
- HCONV hConv,
- HSZ hszItem,
- UINT wFmt,
- UINT wType,
- DWORD dwTimeout,
- LPDWORD pdwResult);
-#endif // no DMLERR_NO_ERROR
-
// ----------------------------------------------------------------------------
// macros and constants
// ----------------------------------------------------------------------------
// string handles
static HSZ DDEAtomFromString(const wxString& s);
static wxString DDEStringFromAtom(HSZ hsz);
+static void DDEFreeString(HSZ hsz);
// error handling
static wxString DDEGetErrorMsg(UINT error);
#include "wx/listimpl.cpp"
-WX_DEFINE_LIST(wxDDEClientList);
-WX_DEFINE_LIST(wxDDEServerList);
-WX_DEFINE_LIST(wxDDEConnectionList);
+WX_DEFINE_LIST(wxDDEClientList)
+WX_DEFINE_LIST(wxDDEServerList)
+WX_DEFINE_LIST(wxDDEConnectionList)
static wxDDEClientList wxDDEClientObjects;
static wxDDEServerList wxDDEServerObjects;
void wxDDECleanUp()
{
- WX_CLEAR_LIST(wxDDEClientList, wxDDEClientObjects);
- WX_CLEAR_LIST(wxDDEServerList, wxDDEServerObjects);
+ // deleting them later won't work as DDE won't be initialized any more
+ wxASSERT_MSG( wxDDEServerObjects.empty() &&
+ wxDDEClientObjects.empty(),
+ _T("all DDE objects should be deleted by now") );
wxAtomTable.clear();
{
m_serviceName = server;
- if ( !DdeNameService(DDEIdInst, DDEAtomFromString(server), (HSZ)NULL, DNS_REGISTER) )
- {
- DDELogError(wxString::Format(_("Failed to register DDE server '%s'"),
- server.c_str()));
+ HSZ hsz = DDEAtomFromString(server);
+ if ( !hsz )
+ {
return false;
}
- return true;
+
+ bool success = (DdeNameService(DDEIdInst, hsz, (HSZ) NULL, DNS_REGISTER)
+ != NULL);
+
+ if (!success)
+ {
+ DDELogError(wxString::Format(_("Failed to register DDE server '%s'"),
+ server.c_str()));
+ }
+
+ DDEFreeString(hsz);
+
+ return success;
}
wxDDEServer::~wxDDEServer()
{
- if ( !!m_serviceName )
+ if ( !m_serviceName.IsEmpty() )
{
- if ( !DdeNameService(DDEIdInst, DDEAtomFromString(m_serviceName),
- (HSZ)NULL, DNS_UNREGISTER) )
+ HSZ hsz = DDEAtomFromString(m_serviceName);
+
+ if (hsz)
{
- DDELogError(wxString::Format(_("Failed to unregister DDE server '%s'"),
- m_serviceName.c_str()));
+ if ( !DdeNameService(DDEIdInst, hsz,
+ (HSZ) NULL, DNS_UNREGISTER) )
+ {
+ DDELogError(wxString::Format(
+ _("Failed to unregister DDE server '%s'"),
+ m_serviceName.c_str()));
+ }
+
+ DDEFreeString(hsz);
}
}
const wxString& server,
const wxString& topic)
{
- HCONV hConv = DdeConnect(DDEIdInst, DDEAtomFromString(server), DDEAtomFromString(topic),
- (PCONVCONTEXT)NULL);
+ HSZ hszServer = DDEAtomFromString(server);
+
+ if ( !hszServer )
+ {
+ return (wxConnectionBase*) NULL;
+ }
+
+
+ HSZ hszTopic = DDEAtomFromString(topic);
+
+ if ( !hszTopic )
+ {
+ DDEFreeString(hszServer);
+ return (wxConnectionBase*) NULL;
+ }
+
+
+ HCONV hConv = ::DdeConnect(DDEIdInst, hszServer, hszTopic,
+ (PCONVCONTEXT) NULL);
+
+ DDEFreeString(hszServer);
+ DDEFreeString(hszTopic);
+
+
if ( !hConv )
{
- DDELogError(wxString::Format(_("Failed to create connection to server '%s' on topic '%s'"),
- server.c_str(), topic.c_str()));
+ DDELogError( wxString::Format(
+ _("Failed to create connection to server '%s' on topic '%s'"),
+ server.c_str(), topic.c_str()) );
}
else
{
return ok;
}
-bool wxDDEConnection::Execute(const wxChar *data, int size, wxIPCFormat format)
+bool wxDDEConnection::Execute(const wxChar *data, int size, wxIPCFormat WXUNUSED(format))
{
DWORD result;
if (size < 0)
{
- size = wxStrlen(data) + 1;
+ size = (wxStrlen(data) + 1) * sizeof(wxChar); // includes final NUL
}
- bool ok = DdeClientTransaction((LPBYTE)data, size,
+ bool ok = DdeClientTransaction((LPBYTE)data,
+ size,
GetHConv(),
NULL,
- format,
+// If the transaction specified by the wType parameter does not pass data or is XTYP_EXECUTE,
+// wFmt should be zero.
+ 0,
XTYP_EXECUTE,
DDE_TIMEOUT,
&result) != 0;
wxChar *data = GetBufferAtLeast( len );
wxASSERT_MSG(data != NULL,
_T("Buffer too small in wxDDEConnection::Request") );
- DdeGetData(returned_data, (LPBYTE)data, len, 0);
+ (void) DdeGetData(returned_data, (LPBYTE)data, len, 0);
- DdeFreeDataHandle(returned_data);
+ (void) DdeFreeDataHandle(returned_data);
if (size)
*size = (int)len;
DWORD result;
if (size < 0)
{
- size = wxStrlen(data) + 1;
+ size = (wxStrlen(data) + 1) * sizeof(wxChar); // includes final NUL
}
HSZ item_atom = DDEGetAtom(item);
- bool ok = DdeClientTransaction((LPBYTE)data, size,
+ bool ok = DdeClientTransaction((LPBYTE)data,
+ size,
GetHConv(),
item_atom, format,
XTYP_POKE,
{
if (size < 0)
{
- size = wxStrlen(data) + 1;
+ size = (wxStrlen(data) + 1) * sizeof(wxChar); // includes final NUL
}
HSZ item_atom = DDEGetAtom(item);
HSZ topic_atom = DDEGetAtom(m_topicName);
m_sendingData = data; // mrf: potential for scope problems here?
m_dataSize = size;
- m_dataType = format;
+ // wxIPC_PRIVATE does not succeed, so use text instead
+ m_dataType = format == wxIPC_PRIVATE ? wxIPC_TEXT : format;
bool ok = DdePostAdvise(DDEIdInst, topic_atom, item_atom) != 0;
if ( !ok )
DdeFreeDataHandle(hData);
+// XTYP_EXECUTE cannot be used for arbitrary data, but only for text
if ( connection->OnExecute(connection->m_topicName,
data,
(int)len,
- (wxIPCFormat) wFmt) )
+ wxIPC_TEXT ) )
{
return (DDERETURN)(DWORD)DDE_FACK;
}
if (data)
{
if (user_size < 0)
- user_size = wxStrlen((wxChar*)data) + 1;
+ user_size = (wxStrlen((wxChar*)data) + 1) * sizeof(wxChar); // includes final NUL
HDDEDATA handle = DdeCreateDataHandle(DDEIdInst,
(LPBYTE)data,
wxChar *data = connection->GetBufferAtLeast( len );
wxASSERT_MSG(data != NULL,
- _T("Buffer too small in _DDECallback (XTYP_EXECUTE)") );
+ _T("Buffer too small in _DDECallback (XTYP_POKE)") );
DdeGetData(hData, (LPBYTE)data, len, 0);
return DDEAddAtom(str);
}
-// atom <-> strings
+/* atom <-> strings
+The returned handle has to be freed by the caller (using
+(static) DDEFreeString).
+*/
static HSZ DDEAtomFromString(const wxString& s)
{
wxASSERT_MSG( DDEIdInst, _T("DDE not initialized") );
static const size_t len = 256;
wxString s;
- (void)DdeQueryString(DDEIdInst, hsz, s.GetWriteBuf(len), len, DDE_CP);
- s.UngetWriteBuf();
+ (void)DdeQueryString(DDEIdInst, hsz, wxStringBuffer(s, len), len, DDE_CP);
return s;
}
+static void DDEFreeString(HSZ hsz)
+{
+ // DS: Failure to free a string handle might indicate there's
+ // some other severe error.
+ bool ok = (::DdeFreeStringHandle(DDEIdInst, hsz) != 0);
+ wxASSERT_MSG( ok, wxT("Failed to free DDE string handle") );
+ wxUnusedVar(ok);
+}
+
// ----------------------------------------------------------------------------
// error handling
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff