114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
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/*
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* Copyright (C) 2013, 2016 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef APICallbackFunction_h
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#define APICallbackFunction_h
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#include "APICast.h"
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#include "Error.h"
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#include "JSCallbackConstructor.h"
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#include "JSLock.h"
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#include <wtf/Vector.h>
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namespace JSC {
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struct APICallbackFunction {
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template <typename T> static EncodedJSValue JSC_HOST_CALL call(ExecState*);
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template <typename T> static EncodedJSValue JSC_HOST_CALL construct(ExecState*);
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};
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template <typename T>
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EncodedJSValue JSC_HOST_CALL APICallbackFunction::call(ExecState* exec)
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{
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VM& vm = exec->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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JSContextRef execRef = toRef(exec);
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JSObjectRef functionRef = toRef(exec->jsCallee());
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JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(exec->thisValue().toThis(exec, NotStrictMode)));
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int argumentCount = static_cast<int>(exec->argumentCount());
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Vector<JSValueRef, 16> arguments;
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arguments.reserveInitialCapacity(argumentCount);
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for (int i = 0; i < argumentCount; i++)
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arguments.uncheckedAppend(toRef(exec, exec->uncheckedArgument(i)));
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JSValueRef exception = 0;
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JSValueRef result;
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{
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JSLock::DropAllLocks dropAllLocks(exec);
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result = jsCast<T*>(toJS(functionRef))->functionCallback()(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
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}
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if (exception)
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throwException(exec, scope, toJS(exec, exception));
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// result must be a valid JSValue.
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if (!result)
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return JSValue::encode(jsUndefined());
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return JSValue::encode(toJS(exec, result));
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}
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template <typename T>
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EncodedJSValue JSC_HOST_CALL APICallbackFunction::construct(ExecState* exec)
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{
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VM& vm = exec->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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JSObject* constructor = exec->jsCallee();
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JSContextRef ctx = toRef(exec);
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JSObjectRef constructorRef = toRef(constructor);
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JSObjectCallAsConstructorCallback callback = jsCast<T*>(constructor)->constructCallback();
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if (callback) {
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size_t argumentCount = exec->argumentCount();
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Vector<JSValueRef, 16> arguments;
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arguments.reserveInitialCapacity(argumentCount);
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for (size_t i = 0; i < argumentCount; ++i)
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arguments.uncheckedAppend(toRef(exec, exec->uncheckedArgument(i)));
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JSValueRef exception = 0;
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JSObjectRef result;
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{
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JSLock::DropAllLocks dropAllLocks(exec);
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result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);
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}
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if (exception) {
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throwException(exec, scope, toJS(exec, exception));
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return JSValue::encode(toJS(exec, exception));
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}
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// result must be a valid JSValue.
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if (!result)
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return throwVMTypeError(exec, scope);
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return JSValue::encode(toJS(result));
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}
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return JSValue::encode(toJS(JSObjectMake(ctx, jsCast<JSCallbackConstructor*>(constructor)->classRef(), 0)));
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}
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} // namespace JSC
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#endif // APICallbackFunction_h
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