/* * tclWinDde.c -- * * This file provides procedures that implement the "send" * command, allowing commands to be passed from interpreter * to interpreter. * * Copyright (c) 1997 by Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclWinDde.c,v 1.13.2.8 2011/01/14 16:03:14 nijtmans Exp $ */ #include "tclPort.h" #include #include #include /* * TCL_STORAGE_CLASS is set unconditionally to DLLEXPORT because the * Registry_Init declaration is in the source file itself, which is only * accessed when we are building a library. */ #undef TCL_STORAGE_CLASS #define TCL_STORAGE_CLASS DLLEXPORT /* * The following structure is used to keep track of the interpreters * registered by this process. */ typedef struct RegisteredInterp { struct RegisteredInterp *nextPtr; /* The next interp this application knows * about. */ char *name; /* Interpreter's name (malloc-ed). */ Tcl_Interp *interp; /* The interpreter attached to this name. */ } RegisteredInterp; /* * Used to keep track of conversations. */ typedef struct Conversation { struct Conversation *nextPtr; /* The next conversation in the list. */ RegisteredInterp *riPtr; /* The info we know about the conversation. */ HCONV hConv; /* The DDE handle for this conversation. */ Tcl_Obj *returnPackagePtr; /* The result package for this conversation. */ } Conversation; typedef struct ThreadSpecificData { Conversation *currentConversations; /* A list of conversations currently * being processed. */ RegisteredInterp *interpListPtr; /* List of all interpreters registered * in the current process. */ } ThreadSpecificData; static Tcl_ThreadDataKey dataKey; /* * The following variables cannot be placed in thread-local storage. * The Mutex ddeMutex guards access to the ddeInstance. */ static HSZ ddeServiceGlobal = 0; static DWORD ddeInstance; /* The application instance handle given * to us by DdeInitialize. */ static int ddeIsServer = 0; #define TCL_DDE_VERSION "1.2.4" #define TCL_DDE_PACKAGE_NAME "dde" #define TCL_DDE_SERVICE_NAME "TclEval" TCL_DECLARE_MUTEX(ddeMutex) /* * Forward declarations for procedures defined later in this file. */ static void DdeExitProc _ANSI_ARGS_((ClientData clientData)); static void DeleteProc _ANSI_ARGS_((ClientData clientData)); static Tcl_Obj * ExecuteRemoteObject _ANSI_ARGS_(( RegisteredInterp *riPtr, Tcl_Obj *ddeObjectPtr)); static int MakeDdeConnection _ANSI_ARGS_((Tcl_Interp *interp, char *name, HCONV *ddeConvPtr)); static HDDEDATA CALLBACK DdeServerProc _ANSI_ARGS_((UINT uType, UINT uFmt, HCONV hConv, HSZ ddeTopic, HSZ ddeItem, HDDEDATA hData, DWORD dwData1, DWORD dwData2)); static void SetDdeError _ANSI_ARGS_((Tcl_Interp *interp)); static int DdeGetServicesList _ANSI_ARGS_(( Tcl_Interp *interp, char *serviceName, char *topicName)); int Tcl_DdeObjCmd(ClientData clientData, /* Used only for deletion */ Tcl_Interp *interp, /* The interp we are sending from */ int objc, /* Number of arguments */ Tcl_Obj *CONST objv[]); /* The arguments */ EXTERN int Dde_Init(Tcl_Interp *interp); /* *---------------------------------------------------------------------- * * Dde_Init -- * * This procedure initializes the dde command. * * Results: * A standard Tcl result. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Dde_Init( Tcl_Interp *interp) { ThreadSpecificData *tsdPtr; if (!Tcl_InitStubs(interp, "8.0", 0)) { return TCL_ERROR; } Tcl_CreateObjCommand(interp, "dde", Tcl_DdeObjCmd, NULL, NULL); tsdPtr = TCL_TSD_INIT(&dataKey); Tcl_CreateExitHandler(DdeExitProc, NULL); return Tcl_PkgProvide(interp, TCL_DDE_PACKAGE_NAME, TCL_DDE_VERSION); } /* *---------------------------------------------------------------------- * * Initialize -- * * Initialize the global DDE instance. * * Results: * None. * * Side effects: * Registers the DDE server proc. * *---------------------------------------------------------------------- */ static void Initialize(void) { int nameFound = 0; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); /* * See if the application is already registered; if so, remove its * current name from the registry. The deletion of the command * will take care of disposing of this entry. */ if (tsdPtr->interpListPtr != NULL) { nameFound = 1; } /* * Make sure that the DDE server is there. This is done only once, * add an exit handler tear it down. */ if (ddeInstance == 0) { Tcl_MutexLock(&ddeMutex); if (ddeInstance == 0) { if (DdeInitialize(&ddeInstance, DdeServerProc, CBF_SKIP_REGISTRATIONS | CBF_SKIP_UNREGISTRATIONS | CBF_FAIL_POKES, 0) != DMLERR_NO_ERROR) { ddeInstance = 0; } } Tcl_MutexUnlock(&ddeMutex); } if ((ddeServiceGlobal == 0) && (nameFound != 0)) { Tcl_MutexLock(&ddeMutex); if ((ddeServiceGlobal == 0) && (nameFound != 0)) { ddeIsServer = 1; Tcl_CreateExitHandler(DdeExitProc, NULL); ddeServiceGlobal = DdeCreateStringHandle(ddeInstance, \ TCL_DDE_SERVICE_NAME, 0); DdeNameService(ddeInstance, ddeServiceGlobal, 0L, DNS_REGISTER); } else { ddeIsServer = 0; } Tcl_MutexUnlock(&ddeMutex); } } /* *-------------------------------------------------------------- * * DdeSetServerName -- * * This procedure is called to associate an ASCII name with a Dde * server. If the interpreter has already been named, the * name replaces the old one. * * Results: * The return value is the name actually given to the interp. * This will normally be the same as name, but if name was already * in use for a Dde Server then a name of the form "name #2" will * be chosen, with a high enough number to make the name unique. * * Side effects: * Registration info is saved, thereby allowing the "send" command * to be used later to invoke commands in the application. In * addition, the "send" command is created in the application's * interpreter. The registration will be removed automatically * if the interpreter is deleted or the "send" command is removed. * *-------------------------------------------------------------- */ static char * DdeSetServerName( Tcl_Interp *interp, char *name /* The name that will be used to * refer to the interpreter in later * "send" commands. Must be globally * unique. */ ) { int suffix, offset; RegisteredInterp *riPtr, *prevPtr; Tcl_DString dString; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); /* * See if the application is already registered; if so, remove its * current name from the registry. The deletion of the command * will take care of disposing of this entry. */ for (riPtr = tsdPtr->interpListPtr, prevPtr = NULL; riPtr != NULL; prevPtr = riPtr, riPtr = riPtr->nextPtr) { if (riPtr->interp == interp) { if (name != NULL) { if (prevPtr == NULL) { tsdPtr->interpListPtr = tsdPtr->interpListPtr->nextPtr; } else { prevPtr->nextPtr = riPtr->nextPtr; } break; } else { /* * the name was NULL, so the caller is asking for * the name of the current interp. */ return riPtr->name; } } } if (name == NULL) { /* * the name was NULL, so the caller is asking for * the name of the current interp, but it doesn't * have a name. */ return ""; } /* * Pick a name to use for the application. Use "name" if it's not * already in use. Otherwise add a suffix such as " #2", trying * larger and larger numbers until we eventually find one that is * unique. */ suffix = 1; offset = 0; Tcl_DStringInit(&dString); /* * We have found a unique name. Now add it to the registry. */ riPtr = (RegisteredInterp *) ckalloc(sizeof(RegisteredInterp)); riPtr->interp = interp; riPtr->name = ckalloc((unsigned int) strlen(name) + 1); riPtr->nextPtr = tsdPtr->interpListPtr; tsdPtr->interpListPtr = riPtr; strcpy(riPtr->name, name); Tcl_CreateObjCommand(interp, "dde", Tcl_DdeObjCmd, (ClientData) riPtr, DeleteProc); if (Tcl_IsSafe(interp)) { Tcl_HideCommand(interp, "dde", "dde"); } Tcl_DStringFree(&dString); /* * re-initialize with the new name */ Initialize(); return riPtr->name; } /* *-------------------------------------------------------------- * * DeleteProc * * This procedure is called when the command "dde" is destroyed. * * Results: * none * * Side effects: * The interpreter given by riPtr is unregistered. * *-------------------------------------------------------------- */ static void DeleteProc(clientData) ClientData clientData; /* The interp we are deleting passed * as ClientData. */ { RegisteredInterp *riPtr = (RegisteredInterp *) clientData; RegisteredInterp *searchPtr, *prevPtr; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); for (searchPtr = tsdPtr->interpListPtr, prevPtr = NULL; (searchPtr != NULL) && (searchPtr != riPtr); prevPtr = searchPtr, searchPtr = searchPtr->nextPtr) { /* * Empty loop body. */ } if (searchPtr != NULL) { if (prevPtr == NULL) { tsdPtr->interpListPtr = tsdPtr->interpListPtr->nextPtr; } else { prevPtr->nextPtr = searchPtr->nextPtr; } } ckfree(riPtr->name); Tcl_EventuallyFree(clientData, TCL_DYNAMIC); } /* *-------------------------------------------------------------- * * ExecuteRemoteObject -- * * Takes the package delivered by DDE and executes it in * the server's interpreter. * * Results: * A list Tcl_Obj * that describes what happened. The first * element is the numerical return code (TCL_ERROR, etc.). * The second element is the result of the script. If the * return result was TCL_ERROR, then the third element * will be the value of the global "errorCode", and the * fourth will be the value of the global "errorInfo". * The return result will have a refCount of 0. * * Side effects: * A Tcl script is run, which can cause all kinds of other * things to happen. * *-------------------------------------------------------------- */ static Tcl_Obj * ExecuteRemoteObject( RegisteredInterp *riPtr, /* Info about this server. */ Tcl_Obj *ddeObjectPtr) /* The object to execute. */ { Tcl_Obj *errorObjPtr; Tcl_Obj *returnPackagePtr; int result; result = Tcl_EvalObjEx(riPtr->interp, ddeObjectPtr, TCL_EVAL_GLOBAL); returnPackagePtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); Tcl_ListObjAppendElement(NULL, returnPackagePtr, Tcl_NewIntObj(result)); Tcl_ListObjAppendElement(NULL, returnPackagePtr, Tcl_GetObjResult(riPtr->interp)); if (result == TCL_ERROR) { errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorCode", NULL, TCL_GLOBAL_ONLY); Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr); errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorInfo", NULL, TCL_GLOBAL_ONLY); Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr); } return returnPackagePtr; } /* *-------------------------------------------------------------- * * DdeServerProc -- * * Handles all transactions for this server. Can handle * execute, request, and connect protocols. Dde will * call this routine when a client attempts to run a dde * command using this server. * * Results: * A DDE Handle with the result of the dde command. * * Side effects: * Depending on which command is executed, arbitrary * Tcl scripts can be run. * *-------------------------------------------------------------- */ static HDDEDATA CALLBACK DdeServerProc ( UINT uType, /* The type of DDE transaction we * are performing. */ UINT uFmt, /* The format that data is sent or * received. */ HCONV hConv, /* The conversation associated with the * current transaction. */ HSZ ddeTopic, /* A string handle. Transaction-type * dependent. */ HSZ ddeItem, /* A string handle. Transaction-type * dependent. */ HDDEDATA hData, /* DDE data. Transaction-type dependent. */ DWORD dwData1, /* Transaction-dependent data. */ DWORD dwData2) /* Transaction-dependent data. */ { Tcl_DString dString; int len; DWORD dlen; char *utilString; Tcl_Obj *ddeObjectPtr; HDDEDATA ddeReturn = NULL; RegisteredInterp *riPtr; Conversation *convPtr, *prevConvPtr; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); switch(uType) { case XTYP_CONNECT: /* * Dde is trying to initialize a conversation with us. Check * and make sure we have a valid topic. */ len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0); Tcl_DStringInit(&dString); Tcl_DStringSetLength(&dString, len); utilString = Tcl_DStringValue(&dString); DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1, CP_WINANSI); for (riPtr = tsdPtr->interpListPtr; riPtr != NULL; riPtr = riPtr->nextPtr) { if (stricmp(utilString, riPtr->name) == 0) { Tcl_DStringFree(&dString); return (HDDEDATA) TRUE; } } Tcl_DStringFree(&dString); return (HDDEDATA) FALSE; case XTYP_CONNECT_CONFIRM: /* * Dde has decided that we can connect, so it gives us a * conversation handle. We need to keep track of it * so we know which execution result to return in an * XTYP_REQUEST. */ len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0); Tcl_DStringInit(&dString); Tcl_DStringSetLength(&dString, len); utilString = Tcl_DStringValue(&dString); DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1, CP_WINANSI); for (riPtr = tsdPtr->interpListPtr; riPtr != NULL; riPtr = riPtr->nextPtr) { if (stricmp(riPtr->name, utilString) == 0) { convPtr = (Conversation *) ckalloc(sizeof(Conversation)); convPtr->nextPtr = tsdPtr->currentConversations; convPtr->returnPackagePtr = NULL; convPtr->hConv = hConv; convPtr->riPtr = riPtr; tsdPtr->currentConversations = convPtr; break; } } Tcl_DStringFree(&dString); return (HDDEDATA) TRUE; case XTYP_DISCONNECT: /* * The client has disconnected from our server. Forget this * conversation. */ for (convPtr = tsdPtr->currentConversations, prevConvPtr = NULL; convPtr != NULL; prevConvPtr = convPtr, convPtr = convPtr->nextPtr) { if (hConv == convPtr->hConv) { if (prevConvPtr == NULL) { tsdPtr->currentConversations = convPtr->nextPtr; } else { prevConvPtr->nextPtr = convPtr->nextPtr; } if (convPtr->returnPackagePtr != NULL) { Tcl_DecrRefCount(convPtr->returnPackagePtr); } ckfree((char *) convPtr); break; } } return (HDDEDATA) TRUE; case XTYP_REQUEST: /* * This could be either a request for a value of a Tcl variable, * or it could be the send command requesting the results of the * last execute. */ if (uFmt != CF_TEXT) { return (HDDEDATA) FALSE; } ddeReturn = (HDDEDATA) FALSE; for (convPtr = tsdPtr->currentConversations; (convPtr != NULL) && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) { /* * Empty loop body. */ } if (convPtr != NULL) { char *returnString; len = DdeQueryString(ddeInstance, ddeItem, NULL, 0, CP_WINANSI); Tcl_DStringInit(&dString); Tcl_DStringSetLength(&dString, len); utilString = Tcl_DStringValue(&dString); DdeQueryString(ddeInstance, ddeItem, utilString, (DWORD) len + 1, CP_WINANSI); if (stricmp(utilString, "$TCLEVAL$EXECUTE$RESULT") == 0) { returnString = Tcl_GetStringFromObj(convPtr->returnPackagePtr, &len); ddeReturn = DdeCreateDataHandle(ddeInstance, returnString, (DWORD) len+1, 0, ddeItem, CF_TEXT, 0); } else { Tcl_Obj *variableObjPtr = Tcl_GetVar2Ex( convPtr->riPtr->interp, utilString, NULL, TCL_GLOBAL_ONLY); if (variableObjPtr != NULL) { returnString = Tcl_GetStringFromObj(variableObjPtr, &len); ddeReturn = DdeCreateDataHandle(ddeInstance, returnString, (DWORD) len+1, 0, ddeItem, CF_TEXT, 0); } else { ddeReturn = NULL; } } Tcl_DStringFree(&dString); } return ddeReturn; case XTYP_EXECUTE: { /* * Execute this script. The results will be saved into * a list object which will be retreived later. See * ExecuteRemoteObject. */ Tcl_Obj *returnPackagePtr; for (convPtr = tsdPtr->currentConversations; (convPtr != NULL) && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) { /* * Empty loop body. */ } if (convPtr == NULL) { return (HDDEDATA) DDE_FNOTPROCESSED; } utilString = (char *) DdeAccessData(hData, &dlen); len = dlen; ddeObjectPtr = Tcl_NewStringObj(utilString, -1); Tcl_IncrRefCount(ddeObjectPtr); DdeUnaccessData(hData); if (convPtr->returnPackagePtr != NULL) { Tcl_DecrRefCount(convPtr->returnPackagePtr); } convPtr->returnPackagePtr = NULL; returnPackagePtr = ExecuteRemoteObject(convPtr->riPtr, ddeObjectPtr); Tcl_IncrRefCount(returnPackagePtr); for (convPtr = tsdPtr->currentConversations; (convPtr != NULL) && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) { /* * Empty loop body. */ } if (convPtr != NULL) { convPtr->returnPackagePtr = returnPackagePtr; } else { Tcl_DecrRefCount(returnPackagePtr); } Tcl_DecrRefCount(ddeObjectPtr); if (returnPackagePtr == NULL) { return (HDDEDATA) DDE_FNOTPROCESSED; } else { return (HDDEDATA) DDE_FACK; } } case XTYP_WILDCONNECT: { /* * Dde wants a list of services and topics that we support. */ HSZPAIR *returnPtr; int i; int numItems; for (i = 0, riPtr = tsdPtr->interpListPtr; riPtr != NULL; i++, riPtr = riPtr->nextPtr) { /* * Empty loop body. */ } numItems = i; ddeReturn = DdeCreateDataHandle(ddeInstance, NULL, (numItems + 1) * sizeof(HSZPAIR), 0, 0, 0, 0); returnPtr = (HSZPAIR *) DdeAccessData(ddeReturn, &dlen); len = dlen; for (i = 0, riPtr = tsdPtr->interpListPtr; i < numItems; i++, riPtr = riPtr->nextPtr) { returnPtr[i].hszSvc = DdeCreateStringHandle( ddeInstance, "TclEval", CP_WINANSI); returnPtr[i].hszTopic = DdeCreateStringHandle( ddeInstance, riPtr->name, CP_WINANSI); } returnPtr[i].hszSvc = NULL; returnPtr[i].hszTopic = NULL; DdeUnaccessData(ddeReturn); return ddeReturn; } } return NULL; } /* *-------------------------------------------------------------- * * DdeExitProc -- * * Gets rid of our DDE server when we go away. * * Results: * None. * * Side effects: * The DDE server is deleted. * *-------------------------------------------------------------- */ static void DdeExitProc( ClientData clientData) /* Not used in this handler. */ { DdeNameService(ddeInstance, NULL, 0, DNS_UNREGISTER); DdeUninitialize(ddeInstance); ddeInstance = 0; } /* *-------------------------------------------------------------- * * MakeDdeConnection -- * * This procedure is a utility used to connect to a DDE * server when given a server name and a topic name. * * Results: * A standard Tcl result. * * * Side effects: * Passes back a conversation through ddeConvPtr * *-------------------------------------------------------------- */ static int MakeDdeConnection( Tcl_Interp *interp, /* Used to report errors. */ char *name, /* The connection to use. */ HCONV *ddeConvPtr) { HSZ ddeTopic, ddeService; HCONV ddeConv; ddeService = DdeCreateStringHandle(ddeInstance, "TclEval", 0); ddeTopic = DdeCreateStringHandle(ddeInstance, name, 0); ddeConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL); DdeFreeStringHandle(ddeInstance, ddeService); DdeFreeStringHandle(ddeInstance, ddeTopic); if (ddeConv == (HCONV) NULL) { if (interp != NULL) { Tcl_AppendResult(interp, "no registered server named \"", name, "\"", (char *) NULL); } return TCL_ERROR; } *ddeConvPtr = ddeConv; return TCL_OK; } /* *-------------------------------------------------------------- * * DdeGetServicesList -- * * This procedure obtains the list of DDE services. * * The functions between here and this procedure are all * involved with handling the DDE callbacks for this. * * Results: * A standard Tcl result. * * Side effects: * Sets the services list into the interp result. * *-------------------------------------------------------------- */ typedef struct ddeEnumServices { Tcl_Interp *interp; int result; ATOM service; ATOM topic; HWND hwnd; } ddeEnumServices; LRESULT CALLBACK DdeClientWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); static LRESULT DdeServicesOnAck(HWND hwnd, WPARAM wParam, LPARAM lParam); static int DdeCreateClient(ddeEnumServices *es) { WNDCLASSEX wc; static const char *szDdeClientClassName = "TclEval client class"; static const char *szDdeClientWindowName = "TclEval client window"; memset(&wc, 0, sizeof(wc)); wc.cbSize = sizeof(wc); wc.lpfnWndProc = DdeClientWindowProc; wc.lpszClassName = szDdeClientClassName; wc.cbWndExtra = sizeof(ddeEnumServices*); /* register and create the callback window */ RegisterClassEx(&wc); es->hwnd = CreateWindowEx(0, szDdeClientClassName, szDdeClientWindowName, WS_POPUP, 0, 0, 0, 0, NULL, NULL, NULL, (LPVOID)es); return TCL_OK; } LRESULT CALLBACK DdeClientWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { LRESULT lr = 0L; switch (uMsg) { case WM_CREATE: { LPCREATESTRUCT lpcs = (LPCREATESTRUCT)lParam; ddeEnumServices *es; es = (ddeEnumServices*)lpcs->lpCreateParams; #ifdef _WIN64 SetWindowLongPtr(hwnd, GWLP_USERDATA, (long)es); #else SetWindowLong(hwnd, GWL_USERDATA, (long)es); #endif break; } case WM_DDE_ACK: lr = DdeServicesOnAck(hwnd, wParam, lParam); break; default: lr = DefWindowProc(hwnd, uMsg, wParam, lParam); } return lr; } static LRESULT DdeServicesOnAck(HWND hwnd, WPARAM wParam, LPARAM lParam) { HWND hwndRemote = (HWND)wParam; ATOM service = (ATOM)LOWORD(lParam); ATOM topic = (ATOM)HIWORD(lParam); ddeEnumServices *es; TCHAR sz[255]; #ifdef _WIN64 es = (ddeEnumServices *)GetWindowLongPtr(hwnd, GWLP_USERDATA); #else es = (ddeEnumServices *)GetWindowLong(hwnd, GWL_USERDATA); #endif if ((es->service == (ATOM)NULL || es->service == service) && (es->topic == (ATOM)NULL || es->topic == topic)) { Tcl_Obj *matchPtr = Tcl_NewListObj(0, NULL); GlobalGetAtomName(service, sz, 255); Tcl_ListObjAppendElement(es->interp, matchPtr, Tcl_NewStringObj(sz, -1)); GlobalGetAtomName(topic, sz, 255); Tcl_ListObjAppendElement(es->interp, matchPtr, Tcl_NewStringObj(sz, -1)); /* Adding the hwnd as a third list element provides a unique * identifier in the case of multiple servers with the name * application and topic names. */ /* Needs a TIP though * Tcl_ListObjAppendElement(es->interp, matchPtr, * Tcl_NewLongObj((long)hwndRemote)); */ Tcl_ListObjAppendElement(es->interp, Tcl_GetObjResult(es->interp), matchPtr); } /* tell the server we are no longer interested */ PostMessage(hwndRemote, WM_DDE_TERMINATE, (WPARAM)hwnd, 0L); return 0L; } static BOOL CALLBACK DdeEnumWindowsCallback(HWND hwndTarget, LPARAM lParam) { LRESULT dwResult = 0; ddeEnumServices *es = (ddeEnumServices *)lParam; SendMessageTimeout(hwndTarget, WM_DDE_INITIATE, (WPARAM)es->hwnd, MAKELONG(es->service, es->topic), SMTO_ABORTIFHUNG, 1000, &dwResult); return TRUE; } static int DdeGetServicesList(Tcl_Interp *interp, char *serviceName, char *topicName) { ddeEnumServices es; int r = TCL_OK; es.interp = interp; es.result = TCL_OK; es.service = (serviceName == NULL) ? (ATOM)NULL : GlobalAddAtom(serviceName); es.topic = (topicName == NULL) ? (ATOM)NULL : GlobalAddAtom(topicName); Tcl_ResetResult(interp); /* our list is to be appended to result. */ DdeCreateClient(&es); EnumWindows(DdeEnumWindowsCallback, (LPARAM)&es); if (IsWindow(es.hwnd)) DestroyWindow(es.hwnd); if (es.service != (ATOM)NULL) GlobalDeleteAtom(es.service); if (es.topic != (ATOM)NULL) GlobalDeleteAtom(es.topic); return es.result; } /* *-------------------------------------------------------------- * * SetDdeError -- * * Sets the interp result to a cogent error message * describing the last DDE error. * * Results: * None. * * * Side effects: * The interp's result object is changed. * *-------------------------------------------------------------- */ static void SetDdeError( Tcl_Interp *interp) /* The interp to put the message in.*/ { Tcl_Obj *resultPtr = Tcl_GetObjResult(interp); int err; err = DdeGetLastError(ddeInstance); switch (err) { case DMLERR_DATAACKTIMEOUT: case DMLERR_EXECACKTIMEOUT: case DMLERR_POKEACKTIMEOUT: Tcl_SetStringObj(resultPtr, "remote interpreter did not respond", -1); break; case DMLERR_BUSY: Tcl_SetStringObj(resultPtr, "remote server is busy", -1); break; case DMLERR_NOTPROCESSED: Tcl_SetStringObj(resultPtr, "remote server cannot handle this command", -1); break; default: Tcl_SetStringObj(resultPtr, "dde command failed", -1); } } /* *-------------------------------------------------------------- * * Tcl_DdeObjCmd -- * * This procedure is invoked to process the "dde" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *-------------------------------------------------------------- */ int Tcl_DdeObjCmd( ClientData clientData, /* Used only for deletion */ Tcl_Interp *interp, /* The interp we are sending from */ int objc, /* Number of arguments */ Tcl_Obj *CONST *objv) /* The arguments */ { enum { DDE_SERVERNAME, DDE_EXECUTE, DDE_POKE, DDE_REQUEST, DDE_SERVICES, DDE_EVAL }; static CONST char *ddeCommands[] = {"servername", "execute", "poke", "request", "services", "eval", (char *) NULL}; static CONST char *ddeOptions[] = {"-async", (char *) NULL}; static CONST char *ddeReqOptions[] = {"-binary", (char *) NULL}; int index, argIndex; int async = 0, binary = 0; int result = TCL_OK; HSZ ddeService = NULL; HSZ ddeTopic = NULL; HSZ ddeItem = NULL; HDDEDATA ddeData = NULL; HDDEDATA ddeItemData = NULL; HCONV hConv = NULL; HSZ ddeCookie = 0; char *serviceName, *topicName, *itemString, *dataString; char *string; int firstArg, length, dataLength; DWORD ddeResult; HDDEDATA ddeReturn; RegisteredInterp *riPtr; Tcl_Interp *sendInterp; Tcl_Obj *objPtr; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); /* * Initialize DDE server/client */ if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "?-async? serviceName topicName value"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], ddeCommands, "command", 0, &index) != TCL_OK) { return TCL_ERROR; } switch (index) { case DDE_SERVERNAME: if ((objc != 3) && (objc != 2)) { Tcl_WrongNumArgs(interp, 1, objv, "servername ?serverName?"); return TCL_ERROR; } firstArg = (objc - 1); break; case DDE_EXECUTE: if ((objc < 5) || (objc > 6)) { Tcl_WrongNumArgs(interp, 1, objv, "execute ?-async? serviceName topicName value"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(NULL, objv[2], ddeOptions, "option", 0, &argIndex) != TCL_OK) { if (objc != 5) { Tcl_WrongNumArgs(interp, 1, objv, "execute ?-async? serviceName topicName value"); return TCL_ERROR; } async = 0; firstArg = 2; } else { if (objc != 6) { Tcl_WrongNumArgs(interp, 1, objv, "execute ?-async? serviceName topicName value"); return TCL_ERROR; } async = 1; firstArg = 3; } break; case DDE_POKE: if (objc != 6) { Tcl_WrongNumArgs(interp, 1, objv, "poke serviceName topicName item value"); return TCL_ERROR; } firstArg = 2; break; case DDE_REQUEST: if ((objc < 5) || (objc > 6)) { Tcl_WrongNumArgs(interp, 1, objv, "request ?-binary? serviceName topicName value"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(NULL, objv[2], ddeReqOptions, "option", 0, &argIndex) != TCL_OK) { if (objc != 5) { Tcl_WrongNumArgs(interp, 1, objv, "request ?-binary? serviceName topicName value"); return TCL_ERROR; } binary = 0; firstArg = 2; } else { if (objc != 6) { Tcl_WrongNumArgs(interp, 1, objv, "request ?-binary? serviceName topicName value"); return TCL_ERROR; } binary = 1; firstArg = 3; } break; case DDE_SERVICES: if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "services serviceName topicName"); return TCL_ERROR; } firstArg = 2; break; case DDE_EVAL: if (objc < 4) { Tcl_WrongNumArgs(interp, 1, objv, "eval ?-async? serviceName args"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(NULL, objv[2], ddeOptions, "option", 0, &argIndex) != TCL_OK) { if (objc < 4) { Tcl_WrongNumArgs(interp, 1, objv, "eval ?-async? serviceName args"); return TCL_ERROR; } async = 0; firstArg = 2; } else { if (objc < 5) { Tcl_WrongNumArgs(interp, 1, objv, "eval ?-async? serviceName args"); return TCL_ERROR; } async = 1; firstArg = 3; } break; } Initialize(); if (firstArg != 1) { serviceName = Tcl_GetStringFromObj(objv[firstArg], &length); } else { length = 0; } if (length == 0) { serviceName = NULL; } else if ((index != DDE_SERVERNAME) && (index != DDE_EVAL)) { ddeService = DdeCreateStringHandle(ddeInstance, serviceName, CP_WINANSI); } if ((index != DDE_SERVERNAME) &&(index != DDE_EVAL)) { topicName = Tcl_GetStringFromObj(objv[firstArg + 1], &length); if (length == 0) { topicName = NULL; } else { ddeTopic = DdeCreateStringHandle(ddeInstance, topicName, CP_WINANSI); } } switch (index) { case DDE_SERVERNAME: { serviceName = DdeSetServerName(interp, serviceName); if (serviceName != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), serviceName, -1); } else { Tcl_ResetResult(interp); } break; } case DDE_EXECUTE: { dataString = Tcl_GetStringFromObj(objv[firstArg + 2], &dataLength); if (dataLength == 0) { Tcl_SetStringObj(Tcl_GetObjResult(interp), "cannot execute null data", -1); result = TCL_ERROR; break; } hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL); DdeFreeStringHandle(ddeInstance, ddeService); DdeFreeStringHandle(ddeInstance, ddeTopic); if (hConv == NULL) { SetDdeError(interp); result = TCL_ERROR; break; } ddeData = DdeCreateDataHandle(ddeInstance, dataString, (DWORD) dataLength+1, 0, 0, CF_TEXT, 0); if (ddeData != NULL) { if (async) { DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF, hConv, 0, CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult); DdeAbandonTransaction(ddeInstance, hConv, ddeResult); } else { ddeReturn = DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF, hConv, 0, CF_TEXT, XTYP_EXECUTE, 30000, NULL); if (ddeReturn == 0) { SetDdeError(interp); result = TCL_ERROR; } } DdeFreeDataHandle(ddeData); } else { SetDdeError(interp); result = TCL_ERROR; } break; } case DDE_REQUEST: { itemString = Tcl_GetStringFromObj(objv[firstArg + 2], &length); if (length == 0) { Tcl_SetStringObj(Tcl_GetObjResult(interp), "cannot request value of null data", -1); goto errorNoResult; } hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL); DdeFreeStringHandle(ddeInstance, ddeService); DdeFreeStringHandle(ddeInstance, ddeTopic); if (hConv == NULL) { SetDdeError(interp); result = TCL_ERROR; } else { Tcl_Obj *returnObjPtr; ddeItem = DdeCreateStringHandle(ddeInstance, itemString, CP_WINANSI); if (ddeItem != NULL) { ddeData = DdeClientTransaction(NULL, 0, hConv, ddeItem, CF_TEXT, XTYP_REQUEST, 5000, NULL); if (ddeData == NULL) { SetDdeError(interp); result = TCL_ERROR; } else { DWORD tmp; dataString = DdeAccessData(ddeData, &tmp); dataLength = tmp; if (binary) { returnObjPtr = Tcl_NewByteArrayObj(dataString, dataLength); } else { returnObjPtr = Tcl_NewStringObj(dataString, -1); } DdeUnaccessData(ddeData); DdeFreeDataHandle(ddeData); Tcl_SetObjResult(interp, returnObjPtr); } } else { SetDdeError(interp); result = TCL_ERROR; } } break; } case DDE_POKE: { itemString = Tcl_GetStringFromObj(objv[firstArg + 2], &length); if (length == 0) { Tcl_SetStringObj(Tcl_GetObjResult(interp), "cannot have a null item", -1); goto errorNoResult; } dataString = Tcl_GetStringFromObj(objv[firstArg + 3], &length); hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL); DdeFreeStringHandle(ddeInstance, ddeService); DdeFreeStringHandle(ddeInstance, ddeTopic); if (hConv == NULL) { SetDdeError(interp); result = TCL_ERROR; } else { ddeItem = DdeCreateStringHandle(ddeInstance, itemString, CP_WINANSI); if (ddeItem != NULL) { ddeData = DdeClientTransaction(dataString, (DWORD) length+1, hConv, ddeItem, CF_TEXT, XTYP_POKE, 5000, NULL); if (ddeData == NULL) { SetDdeError(interp); result = TCL_ERROR; } } else { SetDdeError(interp); result = TCL_ERROR; } } break; } case DDE_SERVICES: { result = DdeGetServicesList(interp, serviceName, topicName); break; } case DDE_EVAL: { if (serviceName == NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), "invalid service name \"\"", -1); goto errorNoResult; } objc -= (async + 3); objv += (async + 3); /* * See if the target interpreter is local. If so, execute * the command directly without going through the DDE server. * Don't exchange objects between interps. The target interp could * compile an object, producing a bytecode structure that refers to * other objects owned by the target interp. If the target interp * is then deleted, the bytecode structure would be referring to * deallocated objects. */ for (riPtr = tsdPtr->interpListPtr; riPtr != NULL; riPtr = riPtr->nextPtr) { if (stricmp(serviceName, riPtr->name) == 0) { break; } } if (riPtr != NULL) { /* * This command is to a local interp. No need to go through * the server. */ Tcl_Preserve((ClientData) riPtr); sendInterp = riPtr->interp; Tcl_Preserve((ClientData) sendInterp); /* * Don't exchange objects between interps. The target interp * would compile an object, producing a bytecode structure that * refers to other objects owned by the target interp. If the * target interp is then deleted, the bytecode structure would * be referring to deallocated objects. */ if (objc == 1) { result = Tcl_EvalObjEx(sendInterp, objv[0], TCL_EVAL_GLOBAL); } else { objPtr = Tcl_ConcatObj(objc, objv); Tcl_IncrRefCount(objPtr); result = Tcl_EvalObjEx(sendInterp, objPtr, TCL_EVAL_GLOBAL); Tcl_DecrRefCount(objPtr); } if (interp != sendInterp) { if (result == TCL_ERROR) { /* * An error occurred, so transfer error information * from the destination interpreter back to our * interpreter. */ Tcl_ResetResult(interp); objPtr = Tcl_GetVar2Ex(sendInterp, "errorInfo", NULL, TCL_GLOBAL_ONLY); string = Tcl_GetStringFromObj(objPtr, &length); Tcl_AddObjErrorInfo(interp, string, length); objPtr = Tcl_GetVar2Ex(sendInterp, "errorCode", NULL, TCL_GLOBAL_ONLY); Tcl_SetObjErrorCode(interp, objPtr); } Tcl_SetObjResult(interp, Tcl_GetObjResult(sendInterp)); } Tcl_Release((ClientData) riPtr); Tcl_Release((ClientData) sendInterp); } else { /* * This is a non-local request. Send the script to the server * and poll it for a result. */ if (MakeDdeConnection(interp, serviceName, &hConv) != TCL_OK) { goto error; } objPtr = Tcl_ConcatObj(objc, objv); string = Tcl_GetStringFromObj(objPtr, &length); ddeItemData = DdeCreateDataHandle(ddeInstance, string, (DWORD) length+1, 0, 0, CF_TEXT, 0); if (async) { ddeData = DdeClientTransaction((LPBYTE) ddeItemData, 0xFFFFFFFF, hConv, 0, CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult); DdeAbandonTransaction(ddeInstance, hConv, ddeResult); } else { ddeData = DdeClientTransaction((LPBYTE) ddeItemData, 0xFFFFFFFF, hConv, 0, CF_TEXT, XTYP_EXECUTE, 30000, NULL); if (ddeData != 0) { ddeCookie = DdeCreateStringHandle(ddeInstance, "$TCLEVAL$EXECUTE$RESULT", CP_WINANSI); ddeData = DdeClientTransaction(NULL, 0, hConv, ddeCookie, CF_TEXT, XTYP_REQUEST, 30000, NULL); } } Tcl_DecrRefCount(objPtr); if (ddeData == 0) { SetDdeError(interp); goto errorNoResult; } if (async == 0) { Tcl_Obj *resultPtr; /* * The return handle has a two or four element list in * it. The first element is the return code (TCL_OK, * TCL_ERROR, etc.). The second is the result of the * script. If the return code is TCL_ERROR, then the third * element is the value of the variable "errorCode", and * the fourth is the value of the variable "errorInfo". */ resultPtr = Tcl_NewObj(); length = DdeGetData(ddeData, NULL, 0, 0); Tcl_SetObjLength(resultPtr, length); string = Tcl_GetString(resultPtr); DdeGetData(ddeData, string, (DWORD) length, 0); Tcl_SetObjLength(resultPtr, (int) strlen(string)); if (Tcl_ListObjIndex(NULL, resultPtr, 0, &objPtr) != TCL_OK) { Tcl_DecrRefCount(resultPtr); goto error; } if (Tcl_GetIntFromObj(NULL, objPtr, &result) != TCL_OK) { Tcl_DecrRefCount(resultPtr); goto error; } if (result == TCL_ERROR) { Tcl_ResetResult(interp); if (Tcl_ListObjIndex(NULL, resultPtr, 3, &objPtr) != TCL_OK) { Tcl_DecrRefCount(resultPtr); goto error; } length = -1; string = Tcl_GetStringFromObj(objPtr, &length); Tcl_AddObjErrorInfo(interp, string, length); Tcl_ListObjIndex(NULL, resultPtr, 2, &objPtr); Tcl_SetObjErrorCode(interp, objPtr); } if (Tcl_ListObjIndex(NULL, resultPtr, 1, &objPtr) != TCL_OK) { Tcl_DecrRefCount(resultPtr); goto error; } Tcl_SetObjResult(interp, objPtr); Tcl_DecrRefCount(resultPtr); } } } } if (ddeCookie != NULL) { DdeFreeStringHandle(ddeInstance, ddeCookie); } if (ddeItem != NULL) { DdeFreeStringHandle(ddeInstance, ddeItem); } if (ddeItemData != NULL) { DdeFreeDataHandle(ddeItemData); } if (ddeData != NULL) { DdeFreeDataHandle(ddeData); } if (hConv != NULL) { DdeDisconnect(hConv); } return result; error: Tcl_SetStringObj(Tcl_GetObjResult(interp), "invalid data returned from server", -1); errorNoResult: if (ddeCookie != NULL) { DdeFreeStringHandle(ddeInstance, ddeCookie); } if (ddeItem != NULL) { DdeFreeStringHandle(ddeInstance, ddeItem); } if (ddeItemData != NULL) { DdeFreeDataHandle(ddeItemData); } if (ddeData != NULL) { DdeFreeDataHandle(ddeData); } if (hConv != NULL) { DdeDisconnect(hConv); } return TCL_ERROR; }