C++ Completion::complType方法代码示例

ScriptValue WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode)
{
    {
        MutexLocker lock(m_sharedDataMutex);
        if (m_executionForbidden)
            return noValue();
    }

    initScriptIfNeeded();
    JSLock lock(false);

    ExecState* exec = m_workerContextWrapper->globalExec();
    m_workerContextWrapper->startTimeoutCheck();
    Completion comp = JSC::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), sourceCode.jsSourceCode(), m_workerContextWrapper);
    m_workerContextWrapper->stopTimeoutCheck();

    m_workerContext->thread()->messagingProxy()->reportWorkerThreadActivity(m_workerContext->hasPendingActivity());

    if (comp.complType() == Normal || comp.complType() == ReturnValue)
        return comp.value();

    if (comp.complType() == Throw)
        reportException(exec, comp.value());
    return noValue();
}

JSValue* KJSProxy::evaluate(const String& filename, int baseLine, const String& str, Node* n) 
{
    // evaluate code. Returns the JS return value or 0
    // if there was none, an error occured or the type couldn't be converted.

    initScriptIfNeeded();
    // inlineCode is true for <a href="javascript:doSomething()">
    // and false for <script>doSomething()</script>. Check if it has the
    // expected value in all cases.
    // See smart window.open policy for where this is used.
    bool inlineCode = filename.isNull();

    m_script->setInlineCode(inlineCode);

    JSLock lock;

    JSValue* thisNode = n ? Window::retrieve(m_frame) : toJS(m_script->globalExec(), n);
  
    m_script->startTimeoutCheck();
    Completion comp = m_script->evaluate(filename, baseLine, reinterpret_cast<const KJS::UChar*>(str.characters()), str.length(), thisNode);
    m_script->stopTimeoutCheck();
  
    if (comp.complType() == Normal || comp.complType() == ReturnValue)
        return comp.value();

    if (comp.complType() == Throw) {
        UString errorMessage = comp.value()->toString(m_script->globalExec());
        int lineNumber = comp.value()->toObject(m_script->globalExec())->get(m_script->globalExec(), "line")->toInt32(m_script->globalExec());
        UString sourceURL = comp.value()->toObject(m_script->globalExec())->get(m_script->globalExec(), "sourceURL")->toString(m_script->globalExec());
        if (Page* page = m_frame->page())
            page->chrome()->addMessageToConsole(errorMessage, lineNumber, sourceURL);
    }

    return 0;
}

QVariant KJSProxyImpl::evaluate(QString filename, int baseLine,
                                const QString&str, const DOM::Node &n, Completion *completion) {
  // evaluate code. Returns the JS return value or an invalid QVariant
  // if there was none, an error occured or the type couldn't be converted.

  initScript();
  // inlineCode is true for <a href="javascript:doSomething()">
  // and false for <script>doSomething()</script>. Check if it has the
  // expected value in all cases.
  // See smart window.open policy for where this is used.
  bool inlineCode = filename.isNull();
  //kdDebug(6070) << "KJSProxyImpl::evaluate inlineCode=" << inlineCode << endl;

#ifdef KJS_DEBUGGER
  if (inlineCode)
    filename = "(unknown file)";
  if (KJSDebugWin::instance()) {
    KJSDebugWin::instance()->attach(m_script);
    KJSDebugWin::instance()->setNextSourceInfo(filename,baseLine);
  //    KJSDebugWin::instance()->setMode(KJSDebugWin::Step);
  }
#else
  Q_UNUSED(baseLine);
#endif

  m_script->setInlineCode(inlineCode);
  Window* window = Window::retrieveWindow( m_part );
  KJS::Value thisNode = n.isNull() ? Window::retrieve( m_part ) : getDOMNode(m_script->globalExec(),n);

  UString code( str );

  KJSCPUGuard guard;
  guard.start();
  Completion comp = m_script->evaluate(code, thisNode);
  guard.stop();

  bool success = ( comp.complType() == Normal ) || ( comp.complType() == ReturnValue );

  if (completion)
    *completion = comp;

#ifdef KJS_DEBUGGER
    //    KJSDebugWin::instance()->setCode(QString::null);
#endif

  window->afterScriptExecution();

  // let's try to convert the return value
  if (success && !comp.value().isNull())
    return ValueToVariant( m_script->globalExec(), comp.value());
  else
  {
    if ( comp.complType() == Throw )
    {
        UString msg = comp.value().toString(m_script->globalExec());
        kdWarning(6070) << "Script threw exception: " << msg.qstring() << endl;
    }
    return QVariant();
  }
}

Completion DeclaredFunctionImp::execute(ExecState *exec)
{
  Completion result = body->execute(exec);

  if (result.complType() == Throw || result.complType() == ReturnValue)
      return result;
  return Completion(Normal, Undefined()); // TODO: or ReturnValue ?
}

ScriptValue ScriptController::evaluateInWorld(const ScriptSourceCode& sourceCode, DOMWrapperWorld* world, ShouldAllowXSS shouldAllowXSS)
{
    const SourceCode& jsSourceCode = sourceCode.jsSourceCode();
    String sourceURL = ustringToString(jsSourceCode.provider()->url());

    if (shouldAllowXSS == DoNotAllowXSS && !m_XSSAuditor->canEvaluate(sourceCode.source())) {
        // This script is not safe to be evaluated.
        return JSValue();
    }

    // evaluate code. Returns the JS return value or 0
    // if there was none, an error occurred or the type couldn't be converted.

    // inlineCode is true for <a href="javascript:doSomething()">
    // and false for <script>doSomething()</script>. Check if it has the
    // expected value in all cases.
    // See smart window.open policy for where this is used.
    JSDOMWindowShell* shell = windowShell(world);
    ExecState* exec = shell->window()->globalExec();
    const String* savedSourceURL = m_sourceURL;
    m_sourceURL = &sourceURL;

    JSLock lock(SilenceAssertionsOnly);

    RefPtr<Frame> protect = m_frame;

#if ENABLE(INSPECTOR)
    if (InspectorTimelineAgent* timelineAgent = m_frame->page() ? m_frame->page()->inspectorTimelineAgent() : 0)
        timelineAgent->willEvaluateScript(sourceURL, sourceCode.startLine());
#endif

    exec->globalData().timeoutChecker.start();
    Completion comp = JSMainThreadExecState::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), jsSourceCode, shell);
    exec->globalData().timeoutChecker.stop();

#if ENABLE(INSPECTOR)
    if (InspectorTimelineAgent* timelineAgent = m_frame->page() ? m_frame->page()->inspectorTimelineAgent() : 0)
        timelineAgent->didEvaluateScript();
#endif

    // Evaluating the JavaScript could cause the frame to be deallocated
    // so we start the keep alive timer here.
    m_frame->keepAlive();

    if (comp.complType() == Normal || comp.complType() == ReturnValue) {
        m_sourceURL = savedSourceURL;
        return comp.value();
    }

    if (comp.complType() == Throw || comp.complType() == Interrupted)
        reportException(exec, comp.value());

    m_sourceURL = savedSourceURL;
    return JSValue();
}

static bool runWithScripts(GlobalObject* globalObject, const Vector<Script>& scripts, bool dump)
{
    UString script;
    UString fileName;
    Vector<char> scriptBuffer;

    if (dump)
        BytecodeGenerator::setDumpsGeneratedCode(true);

    JSGlobalData& globalData = globalObject->globalData();

#if ENABLE(SAMPLING_FLAGS)
    SamplingFlags::start();
#endif

    bool success = true;
    for (size_t i = 0; i < scripts.size(); i++) {
        if (scripts[i].isFile) {
            fileName = scripts[i].argument;
            if (!fillBufferWithContentsOfFile(fileName, scriptBuffer))
                return false; // fail early so we can catch missing files
            script = scriptBuffer.data();
        } else {
            script = scripts[i].argument;
            fileName = "[Command Line]";
        }

        globalData.startSampling();

        Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), makeSource(script, fileName));
        success = success && completion.complType() != Throw;
        if (dump) {
            if (completion.complType() == Throw)
                printf("Exception: %s\n", completion.value().toString(globalObject->globalExec()).utf8().data());
            else
                printf("End: %s\n", completion.value().toString(globalObject->globalExec()).utf8().data());
        }

        globalData.stopSampling();
        globalObject->globalExec()->clearException();
    }

#if ENABLE(SAMPLING_FLAGS)
    SamplingFlags::stop();
#endif
    globalData.dumpSampleData(globalObject->globalExec());
#if ENABLE(SAMPLING_COUNTERS)
    AbstractSamplingCounter::dump();
#endif
#if ENABLE(REGEXP_TRACING)
    globalData.dumpRegExpTrace();
#endif
    return success;
}

ScriptValue WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, ScriptValue* exception)
{
    if (isExecutionForbidden())
        return ScriptValue();

    initScriptIfNeeded();
    JSLock lock(SilenceAssertionsOnly);

    ExecState* exec = m_workerContextWrapper->globalExec();
    m_workerContextWrapper->globalData().timeoutChecker.start();
    Completion comp = JSC::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), sourceCode.jsSourceCode(), m_workerContextWrapper.get());
    m_workerContextWrapper->globalData().timeoutChecker.stop();


    ComplType completionType = comp.complType();

    if (completionType == Terminated || m_workerContextWrapper->globalData().terminator.shouldTerminate()) {
        forbidExecution();
        return ScriptValue();
    }

    if (completionType == JSC::Normal || completionType == ReturnValue)
        return ScriptValue(*m_globalData, comp.value());

    if (completionType == Throw) {
        String errorMessage;
        int lineNumber = 0;
        String sourceURL = sourceCode.url().string();
        if (m_workerContext->sanitizeScriptError(errorMessage, lineNumber, sourceURL))
            *exception = ScriptValue(*m_globalData, throwError(exec, createError(exec, errorMessage.impl())));
        else
            *exception = ScriptValue(*m_globalData, comp.value());
    }
    return ScriptValue();
}

static bool runWithScripts(GlobalObject* globalObject, const Vector<UString>& fileNames, bool prettyPrint, bool dump)
{
    Vector<char> script;

    if (dump)
        CodeGenerator::setDumpsGeneratedCode(true);

    bool success = true;
    for (size_t i = 0; i < fileNames.size(); i++) {
        UString fileName = fileNames[i];

        if (!fillBufferWithContentsOfFile(fileName, script))
            return false; // fail early so we can catch missing files

        if (prettyPrint)
            prettyPrintScript(globalObject->globalExec(), fileName, script);
        else {
            Completion completion = Interpreter::evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), fileName, 1, script.data());
            success = success && completion.complType() != Throw;
            if (dump) {
                if (success)
                    printf("End: %s\n", completion.value()->toString(globalObject->globalExec()).ascii());
                else
                    printf("Exception: %s\n", completion.value()->toString(globalObject->globalExec()).ascii());
            }
        }
    }
    return success;
}

static void runInteractive(GlobalObject* globalObject)
{
    while (true) {
#if HAVE(READLINE) && !RUNNING_FROM_XCODE
        char* line = readline(interactivePrompt);
        if (!line)
            break;
        if (line[0])
            add_history(line);
        Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), makeSource(line, interpreterName));
        free(line);
#else
        printf("%s", interactivePrompt);
        Vector<char, 256> line;
        int c;
        while ((c = getchar()) != EOF) {
            // FIXME: Should we also break on \r? 
            if (c == '\n')
                break;
            line.append(c);
        }
        if (line.isEmpty())
            break;
        line.append('\0');
        Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), makeSource(line.data(), interpreterName));
#endif
        if (completion.complType() == Throw)
            printf("Exception: %s\n", completion.value().toString(globalObject->globalExec()).utf8().data());
        else
            printf("%s\n", completion.value().toString(globalObject->globalExec()).utf8().data());

        globalObject->globalExec()->clearException();
    }
    printf("\n");
}

static ExitCode evaluateString(Interpreter *interp, const char *fileName,
                               const UString &code,
                               bool printResult = false)
{
    ExecState *exec = interp->globalExec();

    Completion res = interp->evaluate(fileName, 0, code);

    if (res.complType() == Throw) {
        CString msg = res.value()->toString(exec).UTF8String();
        JSObject *resObj = res.value()->toObject(exec);
        CString message = resObj->toString(exec).UTF8String();
        int line = resObj->toObject(exec)->get(exec, "line")->toUInt32(exec);

        if (fileName) {
            fprintf(stderr, "%s (line %d): ", fileName, line);
        }
        fprintf(stderr, "%s\n", msg.c_str());
        return ErrorEval;
    } else if (printResult) {
        if (res.isValueCompletion() && !res.value()->isUndefined()) {
            CString s8 = res.value()->toString(exec).UTF8String();
            if (s8.size() != 0) {
                fprintf(stdout, "%s\n", s8.c_str());
            }
        }
    }

    return ErrorNone;
}

bool doIt(int argc, char** argv)
{
  bool success = true;
  bool prettyPrint = false;
  GlobalImp* global = new GlobalImp();

  // create interpreter
  RefPtr<Interpreter> interp = new Interpreter(global);
  // add debug() function
  global->put(interp->globalExec(), "debug", new TestFunctionImp(TestFunctionImp::Debug, 1));
  // add "print" for compatibility with the mozilla js shell
  global->put(interp->globalExec(), "print", new TestFunctionImp(TestFunctionImp::Print, 1));
  // add "quit" for compatibility with the mozilla js shell
  global->put(interp->globalExec(), "quit", new TestFunctionImp(TestFunctionImp::Quit, 0));
  // add "gc" for compatibility with the mozilla js shell
  global->put(interp->globalExec(), "gc", new TestFunctionImp(TestFunctionImp::GC, 0));
  // add "version" for compatibility with the mozilla js shell 
  global->put(interp->globalExec(), "version", new TestFunctionImp(TestFunctionImp::Version, 1));
  global->put(interp->globalExec(), "run", new TestFunctionImp(TestFunctionImp::Run, 1));
  
  Interpreter::setShouldPrintExceptions(true);
  
  for (int i = 1; i < argc; i++) {
    const char* fileName = argv[i];
    if (strcmp(fileName, "-f") == 0) // mozilla test driver script uses "-f" prefix for files
      continue;
    if (strcmp(fileName, "-p") == 0) {
      prettyPrint = true;
      continue;
    }
    
    char* script = createStringWithContentsOfFile(fileName);
    if (!script) {
      success = false;
      break; // fail early so we can catch missing files
    }
    
    if (prettyPrint) {
      int errLine = 0;
      UString errMsg;
      UString s = Parser::prettyPrint(script, &errLine, &errMsg);
      if (s.isNull()) {
        fprintf(stderr, "%s:%d: %s.\n", fileName, errLine, errMsg.UTF8String().c_str());
        success = false;
        free(script);
        break;
      }
      
      printf("%s\n", s.UTF8String().c_str());
      
    } else {
      Completion completion = interp->evaluate(fileName, 0, script);
      success = success && completion.complType() != Throw;
    }
    
    free(script);
  }

  return success;
}

/*
    JSRunEvaluate
*/
JSObjectRef JSRunEvaluate(JSRunRef ref)
{
    JSObjectRef result = 0;
    JSRun* ptr = (JSRun*)ref;
    if (ptr)
    {
        Completion completion = ptr->Evaluate();
        if (completion.isValueCompletion())
        {
            result = (JSObjectRef)KJSValueToJSObject(completion.value(), ptr->GetInterpreter()->globalExec());
        }

        if (completion.complType() == Throw)
        {
            JSFlags flags = ptr->Flags();
            if (flags & kJSFlagDebug)
            {
                CFTypeRef error = JSObjectCopyCFValue(result);
                if (error)
                {
                    CFShow(error);
                    CFRelease(error);
                }
            }
        }
    }
    return result;
}

JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
{
    ExecState* exec = toJS(ctx);
    exec->globalData().heap.registerThread();
    JSLock lock(exec);

    JSObject* jsThisObject = toJS(thisObject);

    // evaluate sets "this" to the global object if it is NULL
    JSGlobalObject* globalObject = exec->dynamicGlobalObject();
    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);
    Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, jsThisObject);

    if (completion.complType() == Throw) {
        if (exception)
            *exception = toRef(completion.value());
        return 0;
    }
    
    if (completion.value())
        return toRef(completion.value());
    
    // happens, for example, when the only statement is an empty (';') statement
    return toRef(jsUndefined());
}

static void runInteractive(GlobalObject* globalObject)
{
    while (true) {
#if HAVE(READLINE)
        char* line = readline(interactivePrompt);
        if (!line)
            break;
        if (line[0])
            add_history(line);
        Completion completion = Interpreter::evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), interpreterName, 1, line);
        free(line);
#else
        puts(interactivePrompt);
        Vector<char, 256> line;
        int c;
        while ((c = getchar()) != EOF) {
            // FIXME: Should we also break on \r? 
            if (c == '\n')
                break;
            line.append(c);
        }
        line.append('\0');
        Completion completion = Interpreter::evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), interpreterName, 1, line.data());
#endif
        if (completion.complType() == Throw)
            printf("Exception: %s\n", completion.value()->toString(globalObject->globalExec()).ascii());
        else
            printf("%s\n", completion.value()->toString(globalObject->globalExec()).UTF8String().c_str());

        globalObject->globalExec()->clearException();
    }
    printf("\n");
}

bool NPRuntimeObjectMap::evaluate(NPObject* npObject, const String&scriptString, NPVariant* result)
{
    Global<JSGlobalObject> globalObject(this->globalObject()->globalData(), this->globalObject());
    if (!globalObject)
        return false;

    ExecState* exec = globalObject->globalExec();
    
    JSLock lock(SilenceAssertionsOnly);
    JSValue thisValue = getOrCreateJSObject(globalObject.get(), npObject);

    globalObject->globalData().timeoutChecker.start();
    Completion completion = JSC::evaluate(exec, globalObject->globalScopeChain(), makeSource(UString(scriptString.impl())), thisValue);
    globalObject->globalData().timeoutChecker.stop();

    ComplType completionType = completion.complType();

    JSValue resultValue;
    if (completionType == Normal) {
        resultValue = completion.value();
        if (!resultValue)
            resultValue = jsUndefined();
    } else
        resultValue = jsUndefined();

    exec->clearException();
    
    convertJSValueToNPVariant(exec, resultValue, *result);
    return true;
}