X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cdd64cc06c4f113f9321544b2a2f89db5ca6750a..6063039441bcf82503d5623afd5bb87ae9ec8733:/src/msw/dde.cpp diff --git a/src/msw/dde.cpp b/src/msw/dde.cpp index 03fdc05daf..20bbe4bb23 100644 --- a/src/msw/dde.cpp +++ b/src/msw/dde.cpp @@ -1,11 +1,11 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: msw/dde.cpp +// Name: src/msw/dde.cpp // Purpose: DDE classes // Author: Julian Smart // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem +// Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// @@ -17,10 +17,6 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "dde.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -33,41 +29,20 @@ #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/buffer.h" +#include "wx/strconv.h" #include "wx/msw/private.h" #include -#include #include -#if defined(__TWIN32__) || defined(__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 // ---------------------------------------------------------------------------- @@ -113,6 +88,7 @@ static HSZ DDEGetAtom(const wxString& string); // 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); @@ -122,12 +98,20 @@ static void DDELogError(const wxString& s, UINT error = DMLERR_NO_ERROR); // global variables // ---------------------------------------------------------------------------- +WX_DECLARE_STRING_HASH_MAP( HSZ, wxAtomMap ); + static DWORD DDEIdInst = 0L; static wxDDEConnection *DDECurrentlyConnecting = NULL; +static wxAtomMap wxAtomTable; + +#include "wx/listimpl.cpp" + +WX_DEFINE_LIST(wxDDEClientList) +WX_DEFINE_LIST(wxDDEServerList) +WX_DEFINE_LIST(wxDDEConnectionList) -static wxList wxAtomTable(wxKEY_STRING); -static wxList wxDDEClientObjects; -static wxList wxDDEServerObjects; +static wxDDEClientList wxDDEClientObjects; +static wxDDEServerList wxDDEServerObjects; static bool DDEInitialized = false; @@ -187,15 +171,12 @@ extern void wxDDEInitialize() void wxDDECleanUp() { - wxDDEClientObjects.DeleteContents(true); - wxDDEClientObjects.Clear(); - wxDDEClientObjects.DeleteContents(false); + // 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") ); - wxDDEServerObjects.DeleteContents(true); - wxDDEServerObjects.Clear(); - wxDDEServerObjects.DeleteContents(false); - - wxAtomTable.Clear(); + wxAtomTable.clear(); if ( DDEIdInst != 0 ) { @@ -211,64 +192,75 @@ void wxDDECleanUp() // Global find connection static wxDDEConnection *DDEFindConnection(HCONV hConv) { - wxNode *node = wxDDEServerObjects.GetFirst(); - wxDDEConnection *found = NULL; - while (node && !found) - { - wxDDEServer *object = (wxDDEServer *)node->GetData(); - found = object->FindConnection((WXHCONV) hConv); - node = node->GetNext(); - } - if (found) - return found; - - node = wxDDEClientObjects.GetFirst(); - while (node && !found) - { - wxDDEClient *object = (wxDDEClient *)node->GetData(); - found = object->FindConnection((WXHCONV) hConv); - node = node->GetNext(); - } - return found; + wxDDEServerList::compatibility_iterator serverNode = wxDDEServerObjects.GetFirst(); + wxDDEConnection *found = NULL; + while (serverNode && !found) + { + wxDDEServer *object = serverNode->GetData(); + found = object->FindConnection((WXHCONV) hConv); + serverNode = serverNode->GetNext(); + } + + if (found) + { + return found; + } + + wxDDEClientList::compatibility_iterator clientNode = wxDDEClientObjects.GetFirst(); + while (clientNode && !found) + { + wxDDEClient *object = clientNode->GetData(); + found = object->FindConnection((WXHCONV) hConv); + clientNode = clientNode->GetNext(); + } + return found; } // Global delete connection static void DDEDeleteConnection(HCONV hConv) { - wxNode *node = wxDDEServerObjects.GetFirst(); - bool found = false; - while (node && !found) - { - wxDDEServer *object = (wxDDEServer *)node->GetData(); - found = object->DeleteConnection((WXHCONV) hConv); - node = node->GetNext(); - } - if (found) - return; - - node = wxDDEClientObjects.GetFirst(); - while (node && !found) - { - wxDDEClient *object = (wxDDEClient *)node->GetData(); - found = object->DeleteConnection((WXHCONV) hConv); - node = node->GetNext(); - } + wxDDEServerList::compatibility_iterator serverNode = wxDDEServerObjects.GetFirst(); + bool found = false; + while (serverNode && !found) + { + wxDDEServer *object = serverNode->GetData(); + found = object->DeleteConnection((WXHCONV) hConv); + serverNode = serverNode->GetNext(); + } + if (found) + { + return; + } + + wxDDEClientList::compatibility_iterator clientNode = wxDDEClientObjects.GetFirst(); + while (clientNode && !found) + { + wxDDEClient *object = clientNode->GetData(); + found = object->DeleteConnection((WXHCONV) hConv); + clientNode = clientNode->GetNext(); + } } // Find a server from a service name static wxDDEServer *DDEFindServer(const wxString& s) { - wxNode *node = wxDDEServerObjects.GetFirst(); - wxDDEServer *found = NULL; - while (node && !found) - { - wxDDEServer *object = (wxDDEServer *)node->GetData(); - - if (object->GetServiceName() == s) - found = object; - else node = node->GetNext(); - } - return found; + wxDDEServerList::compatibility_iterator node = wxDDEServerObjects.GetFirst(); + wxDDEServer *found = NULL; + while (node && !found) + { + wxDDEServer *object = node->GetData(); + + if (object->GetServiceName() == s) + { + found = object; + } + else + { + node = node->GetNext(); + } + } + + return found; } // ---------------------------------------------------------------------------- @@ -286,36 +278,55 @@ bool wxDDEServer::Create(const wxString& server) { 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.empty() ) { - 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); } } wxDDEServerObjects.DeleteObject(this); - wxNode *node = m_connections.GetFirst(); + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); while (node) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); - wxNode *next = node->GetNext(); + wxDDEConnection *connection = node->GetData(); + wxDDEConnectionList::compatibility_iterator next = node->GetNext(); connection->SetConnected(false); connection->OnDisconnect(); // May delete the node implicitly node = next; @@ -325,8 +336,8 @@ wxDDEServer::~wxDDEServer() node = m_connections.GetFirst(); while (node) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); - wxNode *next = node->GetNext(); + wxDDEConnection *connection = node->GetData(); + wxDDEConnectionList::compatibility_iterator next = node->GetNext(); delete connection; node = next; } @@ -339,11 +350,11 @@ wxConnectionBase *wxDDEServer::OnAcceptConnection(const wxString& /* topic */) wxDDEConnection *wxDDEServer::FindConnection(WXHCONV conv) { - wxNode *node = m_connections.GetFirst(); + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); wxDDEConnection *found = NULL; while (node && !found) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); + wxDDEConnection *connection = node->GetData(); if (connection->m_hConv == conv) found = connection; else node = node->GetNext(); @@ -354,19 +365,21 @@ wxDDEConnection *wxDDEServer::FindConnection(WXHCONV conv) // Only delete the entry in the map, not the actual connection bool wxDDEServer::DeleteConnection(WXHCONV conv) { - wxNode *node = m_connections.GetFirst(); - bool found = false; - while (node && !found) + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); + while (node) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); + wxDDEConnection *connection = node->GetData(); if (connection->m_hConv == conv) { - found = true; - delete node; + m_connections.Erase(node); + return true; + } + else + { + node = node->GetNext(); } - else node = node->GetNext(); } - return found; + return false; } // ---------------------------------------------------------------------------- @@ -383,10 +396,10 @@ wxDDEClient::wxDDEClient() wxDDEClient::~wxDDEClient() { wxDDEClientObjects.DeleteObject(this); - wxNode *node = m_connections.GetFirst(); + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); while (node) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); + wxDDEConnection *connection = node->GetData(); delete connection; // Deletes the node implicitly (see ~wxDDEConnection) node = m_connections.GetFirst(); } @@ -401,12 +414,35 @@ wxConnectionBase *wxDDEClient::MakeConnection(const wxString& WXUNUSED(host), const wxString& server, const wxString& topic) { - HCONV hConv = DdeConnect(DDEIdInst, DDEAtomFromString(server), DDEAtomFromString(topic), - (PCONVCONTEXT)NULL); + HSZ hszServer = DDEAtomFromString(server); + + if ( !hszServer ) + { + return NULL; + } + + + HSZ hszTopic = DDEAtomFromString(topic); + + if ( !hszTopic ) + { + DDEFreeString(hszServer); + return 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 { @@ -421,7 +457,7 @@ wxConnectionBase *wxDDEClient::MakeConnection(const wxString& WXUNUSED(host), } } - return (wxConnectionBase*) NULL; + return NULL; } wxConnectionBase *wxDDEClient::OnMakeConnection() @@ -431,11 +467,11 @@ wxConnectionBase *wxDDEClient::OnMakeConnection() wxDDEConnection *wxDDEClient::FindConnection(WXHCONV conv) { - wxNode *node = m_connections.GetFirst(); + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); wxDDEConnection *found = NULL; while (node && !found) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); + wxDDEConnection *connection = node->GetData(); if (connection->m_hConv == conv) found = connection; else node = node->GetNext(); @@ -446,26 +482,25 @@ wxDDEConnection *wxDDEClient::FindConnection(WXHCONV conv) // Only delete the entry in the map, not the actual connection bool wxDDEClient::DeleteConnection(WXHCONV conv) { - wxNode *node = m_connections.GetFirst(); - bool found = false; - while (node && !found) + wxDDEConnectionList::compatibility_iterator node = m_connections.GetFirst(); + while (node) { - wxDDEConnection *connection = (wxDDEConnection *)node->GetData(); + wxDDEConnection *connection = node->GetData(); if (connection->m_hConv == conv) { - found = true; - delete node; + m_connections.Erase(node); + return true; } else node = node->GetNext(); } - return found; + return false; } // ---------------------------------------------------------------------------- // wxDDEConnection // ---------------------------------------------------------------------------- -wxDDEConnection::wxDDEConnection(wxChar *buffer, int size) +wxDDEConnection::wxDDEConnection(void *buffer, size_t size) : wxConnectionBase(buffer, size) { m_client = NULL; @@ -512,21 +547,105 @@ bool wxDDEConnection::Disconnect() return ok; } -bool wxDDEConnection::Execute(const wxChar *data, int size, wxIPCFormat format) +bool +wxDDEConnection::DoExecute(const void *data, size_t size, wxIPCFormat format) { - DWORD result; - if (size < 0) + wxCHECK_MSG( format == wxIPC_TEXT || + format == wxIPC_UTF8TEXT || + format == wxIPC_UNICODETEXT, + false, + _T("wxDDEServer::Execute() supports only text data") ); + + wxMemoryBuffer buffer; + LPBYTE realData = NULL; + size_t realSize = 0; + wxMBConv *conv = NULL; + + // Windows only supports either ANSI or UTF-16 format depending on the + // build, so we need to convert the data if it doesn't use it already +#if wxUSE_UNICODE + if ( format == wxIPC_TEXT ) + { + conv = &wxConvLibc; + } + else if ( format == wxIPC_UTF8TEXT ) + { + conv = &wxConvUTF8; + } + else // no conversion necessary for wxIPC_UNICODETEXT { - size = wxStrlen(data) + 1; + realData = (LPBYTE)data; + realSize = size; } - bool ok = DdeClientTransaction((LPBYTE)data, size, - GetHConv(), - NULL, - format, - XTYP_EXECUTE, - DDE_TIMEOUT, - &result) != 0; + if ( conv ) + { + const char * const text = (const char *)data; + const size_t len = size/sizeof(char); + + realSize = conv->ToWChar(NULL, 0, text, len); + if ( realSize == wxCONV_FAILED ) + return false; + + realData = (LPBYTE)buffer.GetWriteBuf(realSize*sizeof(wchar_t)); + if ( !realData ) + return false; + + realSize = conv->ToWChar((wchar_t *)realData, realSize, text, len); + if ( realSize == wxCONV_FAILED ) + return false; + } +#else // !wxUSE_UNICODE + if ( format == wxIPC_UNICODETEXT ) + { + conv = &wxConvLibc; + } + else if ( format == wxIPC_UTF8TEXT ) + { + // we could implement this in theory but it's not obvious how to pass + // the format information and, basically, why bother -- just use + // Unicode build + wxFAIL_MSG( _T("UTF-8 text not supported in ANSI build") ); + + return false; + } + else // don't convert wxIPC_TEXT + { + realData = (LPBYTE)data; + realSize = size; + } + + if ( conv ) + { + const wchar_t * const wtext = (const wchar_t *)data; + const size_t len = size/sizeof(wchar_t); + + realSize = conv->FromWChar(NULL, 0, wtext, len); + if ( realSize == wxCONV_FAILED ) + return false; + + realData = (LPBYTE)buffer.GetWriteBuf(realSize*sizeof(char)); + if ( !realData ) + return false; + + realSize = conv->FromWChar((char*)realData, realSize, wtext, len); + if ( realSize == wxCONV_FAILED ) + return false; + } +#endif // wxUSE_UNICODE/!wxUSE_UNICODE + + DWORD result; + bool ok = DdeClientTransaction(realData, + realSize*sizeof(wxChar), + GetHConv(), + NULL, + // MSDN: 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; if ( !ok ) { @@ -536,7 +655,7 @@ bool wxDDEConnection::Execute(const wxChar *data, int size, wxIPCFormat format) return ok; } -wxChar *wxDDEConnection::Request(const wxString& item, int *size, wxIPCFormat format) +const void *wxDDEConnection::Request(const wxString& item, size_t *size, wxIPCFormat format) { DWORD result; @@ -557,29 +676,26 @@ wxChar *wxDDEConnection::Request(const wxString& item, int *size, wxIPCFormat fo DWORD len = DdeGetData(returned_data, NULL, 0, 0); - wxChar *data = GetBufferAtLeast( len ); + void *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; + *size = (size_t)len; return data; } -bool wxDDEConnection::Poke(const wxString& item, wxChar *data, int size, wxIPCFormat format) +bool wxDDEConnection::DoPoke(const wxString& item, const void *data, size_t size, wxIPCFormat format) { DWORD result; - if (size < 0) - { - size = wxStrlen(data) + 1; - } HSZ item_atom = DDEGetAtom(item); - bool ok = DdeClientTransaction((LPBYTE)data, size, + bool ok = DdeClientTransaction((LPBYTE)data, + size, GetHConv(), item_atom, format, XTYP_POKE, @@ -632,21 +748,17 @@ bool wxDDEConnection::StopAdvise(const wxString& item) } // Calls that SERVER can make -bool wxDDEConnection::Advise(const wxString& item, - wxChar *data, - int size, - wxIPCFormat format) +bool wxDDEConnection::DoAdvise(const wxString& item, + const void *data, + size_t size, + wxIPCFormat format) { - if (size < 0) - { - size = wxStrlen(data) + 1; - } - 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 ) @@ -657,12 +769,6 @@ bool wxDDEConnection::Advise(const wxString& item, return ok; } -bool wxDDEConnection::OnDisconnect() -{ - delete this; - return true; -} - // ---------------------------------------------------------------------------- // _DDECallback // ---------------------------------------------------------------------------- @@ -737,7 +843,7 @@ _DDECallback(WORD wType, { DWORD len = DdeGetData(hData, NULL, 0, 0); - wxChar *data = connection->GetBufferAtLeast( len ); + void *data = connection->GetBufferAtLeast(len); wxASSERT_MSG(data != NULL, _T("Buffer too small in _DDECallback (XTYP_EXECUTE)") ); @@ -745,10 +851,19 @@ _DDECallback(WORD wType, DdeFreeDataHandle(hData); + // XTYP_EXECUTE can be used for text only and the text is + // always in ANSI format for ANSI build and Unicode format + // in Unicode build + #if wxUSE_UNICODE + wFmt = wxIPC_UNICODETEXT; + #else + wFmt = wxIPC_TEXT; + #endif + if ( connection->OnExecute(connection->m_topicName, data, (int)len, - (wxIPCFormat) wFmt) ) + (wxIPCFormat)wFmt) ) { return (DDERETURN)(DWORD)DDE_FACK; } @@ -765,15 +880,26 @@ _DDECallback(WORD wType, { wxString item_name = DDEStringFromAtom(hsz2); - int user_size = -1; - wxChar *data = connection->OnRequest(connection->m_topicName, - item_name, - &user_size, - (wxIPCFormat) wFmt); + size_t user_size = wxNO_LEN; + const void *data = connection->OnRequest(connection->m_topicName, + item_name, + &user_size, + (wxIPCFormat)wFmt); if (data) { - if (user_size < 0) - user_size = wxStrlen((wxChar*)data) + 1; + if (user_size == wxNO_LEN) + switch (wFmt) + { + case wxIPC_TEXT: + case wxIPC_UTF8TEXT: + user_size = strlen((const char*)data) + 1; // includes final NUL + break; + case wxIPC_UNICODETEXT: + user_size = (wcslen((const wchar_t*)data) + 1) * sizeof(wchar_t); // includes final NUL + break; + default: + user_size = 0; + } HDDEDATA handle = DdeCreateDataHandle(DDEIdInst, (LPBYTE)data, @@ -798,9 +924,9 @@ _DDECallback(WORD wType, DWORD len = DdeGetData(hData, NULL, 0, 0); - wxChar *data = connection->GetBufferAtLeast( len ); + void *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); @@ -885,7 +1011,7 @@ _DDECallback(WORD wType, DWORD len = DdeGetData(hData, NULL, 0, 0); - wxChar *data = connection->GetBufferAtLeast( len ); + void *data = connection->GetBufferAtLeast(len); wxASSERT_MSG(data != NULL, _T("Buffer too small in _DDECallback (XTYP_ADVDATA)") ); @@ -914,31 +1040,32 @@ _DDECallback(WORD wType, // ---------------------------------------------------------------------------- // Atom table stuff -static HSZ DDEAddAtom(const wxString& string) +static HSZ DDEAddAtom(const wxString& str) { - HSZ atom = DDEAtomFromString(string); - wxAtomTable.Append(string, (wxObject *)atom); + HSZ atom = DDEAtomFromString(str); + wxAtomTable[str] = atom; return atom; } -static HSZ DDEGetAtom(const wxString& string) +static HSZ DDEGetAtom(const wxString& str) { - wxNode *node = wxAtomTable.Find(string); - if (node) - return (HSZ)node->GetData(); - else - { - DDEAddAtom(string); - return (HSZ)(wxAtomTable.Find(string)->GetData()); - } + wxAtomMap::iterator it = wxAtomTable.find(str); + + if (it != wxAtomTable.end()) + return it->second; + + 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") ); - HSZ hsz = DdeCreateStringHandle(DDEIdInst, (wxChar*) s.c_str(), DDE_CP); + HSZ hsz = DdeCreateStringHandle(DDEIdInst, (wxChar*)s.wx_str(), DDE_CP); if ( !hsz ) { DDELogError(_("Failed to create DDE string")); @@ -953,12 +1080,20 @@ static wxString DDEStringFromAtom(HSZ hsz) 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 // ----------------------------------------------------------------------------