1 /*

     2  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 #include "JSCallbackFunction.h"

    28 

    29 #include "APIShims.h"

    30 #include "APICast.h"

    31 #include "CodeBlock.h"

    32 #include "ExceptionHelpers.h"

    33 #include "JSFunction.h"

    34 #include "FunctionPrototype.h"

    35 #include <runtime/JSGlobalObject.h>

    36 #include <runtime/JSLock.h>

    37 #include <wtf/Vector.h>

    38 

    39 namespace JSC {

    40 

    41 ASSERT_CLASS_FITS_IN_CELL(JSCallbackFunction);

    42 

    43 const ClassInfo JSCallbackFunction::info = { "CallbackFunction", &InternalFunction::info, 0, 0 };

    44 

    45 JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const Identifier& name)

    46     : InternalFunction(&exec->globalData(), globalObject, globalObject->callbackFunctionStructure(), name)

    47     , m_callback(callback)

    48 {

    49 }

    50 

    51 EncodedJSValue JSCallbackFunction::call(ExecState* exec)

    52 {

    53     JSContextRef execRef = toRef(exec);

    54     JSObjectRef functionRef = toRef(exec->callee());

    55     JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));

    56 

    57     int argumentCount = static_cast<int>(exec->argumentCount());

    58     Vector<JSValueRef, 16> arguments(argumentCount);

    59     for (int i = 0; i < argumentCount; i++)

    60         arguments[i] = toRef(exec, exec->argument(i));

    61 

    62     JSValueRef exception = 0;

    63     JSValueRef result;

    64     {

    65         APICallbackShim callbackShim(exec);

    66         result = static_cast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);

    67     }

    68     if (exception)

    69         throwError(exec, toJS(exec, exception));

    70 

    71     return JSValue::encode(toJS(exec, result));

    72 }

    73 

    74 CallType JSCallbackFunction::getCallData(CallData& callData)

    75 {

    76     callData.native.function = call;

    77     return CallTypeHost;

    78 }

    79 

    80 } // namespace JSC