X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/655719367ac5e131d9642e5783f3ecf64d1a3385..3f4a2351e4c677c88c18ea812b609477adee7380:/src/msw/dde.cpp

diff --git a/src/msw/dde.cpp b/src/msw/dde.cpp
index 6554c530de..a7465a0dcc 100644
--- a/src/msw/dde.cpp
+++ b/src/msw/dde.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        msw/dde.cpp
+// Name:        src/msw/dde.cpp
 // Purpose:     DDE classes
 // Author:      Julian Smart
 // Modified by:
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "dde.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -33,40 +29,18 @@
 #ifndef WX_PRECOMP
     #include "wx/utils.h"
     #include "wx/app.h"
+    #include "wx/hashmap.h"
+    #include "wx/module.h"
 #endif
 
-#include "wx/module.h"
 #include "wx/dde.h"
 #include "wx/intl.h"
-#include "wx/hashmap.h"
 
 #include "wx/msw/private.h"
 
 #include <string.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
 // ----------------------------------------------------------------------------
@@ -130,9 +104,9 @@ static wxAtomMap wxAtomTable;
 
 #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;
@@ -326,7 +300,7 @@ bool wxDDEServer::Create(const wxString& server)
 
 wxDDEServer::~wxDDEServer()
 {
-    if ( !!m_serviceName )
+    if ( !m_serviceName.empty() )
     {
         HSZ hsz = DDEAtomFromString(m_serviceName);
 
@@ -571,18 +545,21 @@ bool wxDDEConnection::Disconnect()
     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;
@@ -634,11 +611,12 @@ bool wxDDEConnection::Poke(const wxString& item, wxChar *data, int size, wxIPCFo
     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,
@@ -698,14 +676,15 @@ bool wxDDEConnection::Advise(const wxString& item,
 {
     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 )
@@ -804,10 +783,11 @@ _DDECallback(WORD wType,
 
                     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;
                     }
@@ -832,7 +812,7 @@ _DDECallback(WORD wType,
                     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,
@@ -859,7 +839,7 @@ _DDECallback(WORD wType,
 
                     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);