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 "Error.h"
33#include "ExceptionHelpers.h"
34#include "FunctionPrototype.h"
35#include "JSFunction.h"
36#include "JSGlobalObject.h"
37#include "JSLock.h"
38#include "Operations.h"
39#include <wtf/Vector.h>
40
41namespace JSC {
42
43ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSCallbackFunction);
44
45const ClassInfo JSCallbackFunction::s_info = { "CallbackFunction", &InternalFunction::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackFunction) };
46
47JSCallbackFunction::JSCallbackFunction(JSGlobalObject* globalObject, Structure* structure, JSObjectCallAsFunctionCallback callback)
48    : InternalFunction(globalObject, structure)
49    , m_callback(callback)
50{
51}
52
53void JSCallbackFunction::finishCreation(VM& vm, const String& name)
54{
55    Base::finishCreation(vm, name);
56    ASSERT(inherits(&s_info));
57}
58
59JSCallbackFunction* JSCallbackFunction::create(ExecState* exec, JSGlobalObject* globalObject, JSObjectCallAsFunctionCallback callback, const String& name)
60{
61    JSCallbackFunction* function = new (NotNull, allocateCell<JSCallbackFunction>(*exec->heap())) JSCallbackFunction(globalObject, globalObject->callbackFunctionStructure(), callback);
62    function->finishCreation(exec->vm(), name);
63    return function;
64}
65
66EncodedJSValue JSCallbackFunction::call(ExecState* exec)
67{
68    JSContextRef execRef = toRef(exec);
69    JSObjectRef functionRef = toRef(exec->callee());
70    JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));
71
72    size_t argumentCount = exec->argumentCount();
73    Vector<JSValueRef, 16> arguments;
74    arguments.reserveInitialCapacity(argumentCount);
75    for (size_t i = 0; i < argumentCount; ++i)
76        arguments.uncheckedAppend(toRef(exec, exec->argument(i)));
77
78    JSValueRef exception = 0;
79    JSValueRef result;
80    {
81        APICallbackShim callbackShim(exec);
82        result = jsCast<JSCallbackFunction*>(toJS(functionRef))->m_callback(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
83    }
84    if (exception)
85        throwError(exec, toJS(exec, exception));
86
87    // result must be a valid JSValue.
88    if (!result)
89        return JSValue::encode(jsUndefined());
90
91    return JSValue::encode(toJS(exec, result));
92}
93
94CallType JSCallbackFunction::getCallData(JSCell*, CallData& callData)
95{
96    callData.native.function = call;
97    return CallTypeHost;
98}
99
100} // namespace JSC
101