示例#1
0
文件: tclOOBasic.c 项目: ershov/tcl
int
TclOO_Object_Eval(
    ClientData clientData,	/* Ignored. */
    Tcl_Interp *interp,		/* Interpreter in which to create the object;
				 * also used for error reporting. */
    Tcl_ObjectContext context,	/* The object/call context. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const *objv)	/* The actual arguments. */
{
    CallContext *contextPtr = (CallContext *) context;
    Tcl_Object object = Tcl_ObjectContextObject(context);
    register const int skip = Tcl_ObjectContextSkippedArgs(context);
    CallFrame *framePtr, **framePtrPtr = &framePtr;
    Tcl_Obj *scriptPtr;
    CmdFrame *invoker;

    if (objc-1 < skip) {
        Tcl_WrongNumArgs(interp, skip, objv, "arg ?arg ...?");
        return TCL_ERROR;
    }

    /*
     * Make the object's namespace the current namespace and evaluate the
     * command(s).
     */

    (void) TclPushStackFrame(interp, (Tcl_CallFrame **) framePtrPtr,
                             Tcl_GetObjectNamespace(object), 0);
    framePtr->objc = objc;
    framePtr->objv = objv;	/* Reference counts do not need to be
				 * incremented here. */

    if (!(contextPtr->callPtr->flags & PUBLIC_METHOD)) {
        object = NULL;		/* Now just for error mesage printing. */
    }

    /*
     * Work out what script we are actually going to evaluate.
     *
     * When there's more than one argument, we concatenate them together with
     * spaces between, then evaluate the result. Tcl_EvalObjEx will delete the
     * object when it decrements its refcount after eval'ing it.
     */

    if (objc != skip+1) {
        scriptPtr = Tcl_ConcatObj(objc-skip, objv+skip);
        invoker = NULL;
    } else {
        scriptPtr = objv[skip];
        invoker = ((Interp *) interp)->cmdFramePtr;
    }

    /*
     * Evaluate the script now, with FinalizeEval to do the processing after
     * the script completes.
     */

    TclNRAddCallback(interp, FinalizeEval, object, NULL, NULL, NULL);
    return TclNREvalObjEx(interp, scriptPtr, 0, invoker, skip);
}
示例#2
0
static int
Tcl_InvokeClassProcedureMethod(
    Tcl_Interp *interp,
    Tcl_Obj *namePtr,           /* name of the method */
    Tcl_Namespace *nsPtr,       /* namespace for calling method */
    ProcedureMethod *pmPtr,     /* method type specific data */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const *objv)	/* Arguments as actually seen. */
{
    Proc *procPtr = pmPtr->procPtr;
    int flags = FRAME_IS_METHOD;
    CallFrame frame;
    CallFrame *framePtr = &frame;
    CallFrame **framePtrPtr1 = &framePtr;
    Tcl_CallFrame **framePtrPtr = (Tcl_CallFrame **)framePtrPtr1;
    Command cmd;
    int result;

    memset(&cmd, 0, sizeof(Command));
    cmd.nsPtr = (Namespace *) nsPtr;
    cmd.clientData = NULL;
    pmPtr->procPtr->cmdPtr = &cmd;

    result = TclProcCompileProc(interp, pmPtr->procPtr,
	    pmPtr->procPtr->bodyPtr, (Namespace *) nsPtr, "body of method",
	    Tcl_GetString(namePtr));
    if (result != TCL_OK) {
	return result;
    }
    /*
     * Make the stack frame and fill it out with information about this call.
     * This operation may fail.
     */


    flags |= FRAME_IS_PROC;
    result = TclPushStackFrame(interp, framePtrPtr, nsPtr, flags);
    if (result != TCL_OK) {
	return result;
    }

    framePtr->clientData = NULL;
    framePtr->objc = objc;
    framePtr->objv = objv;
    framePtr->procPtr = procPtr;

    /*
     * Give the pre-call callback a chance to do some setup and, possibly,
     * veto the call.
     */

    if (pmPtr->preCallProc != NULL) {
	int isFinished;

	result = pmPtr->preCallProc(pmPtr->clientData, interp, NULL,
		(Tcl_CallFrame *) framePtr, &isFinished);
	if (isFinished || result != TCL_OK) {
	    Tcl_PopCallFrame(interp);
	    TclStackFree(interp, framePtr);
	    goto done;
	}
    }

    /*
     * Now invoke the body of the method. Note that we need to take special
     * action when doing unknown processing to ensure that the missing method
     * name is passed as an argument.
     */

    if (pmPtr->postCallProc) {
	Tcl_NRAddCallback(interp, CallFinalizePMCall, nsPtr,
		(Tcl_NRPostProc *)pmPtr->postCallProc, pmPtr->clientData, NULL);
    }
    return TclNRInterpProcCore(interp, namePtr, 1, pmPtr->errProc);

done:
    return result;
}