mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
/*
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* Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
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* Copyright (C) 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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#pragma once
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#include "JSCJSValue.h"
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#include "JSObject.h"
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#include "ThrowScope.h"
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namespace JSC {
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struct IterationRecord {
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JSValue iterator;
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JSValue nextMethod;
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};
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JSValue iteratorNext(ExecState*, IterationRecord, JSValue argument = JSValue());
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JS_EXPORT_PRIVATE JSValue iteratorValue(ExecState*, JSValue iterResult);
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bool iteratorComplete(ExecState*, JSValue iterResult);
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JS_EXPORT_PRIVATE JSValue iteratorStep(ExecState*, IterationRecord);
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JS_EXPORT_PRIVATE void iteratorClose(ExecState*, IterationRecord);
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JS_EXPORT_PRIVATE JSObject* createIteratorResultObject(ExecState*, JSValue, bool done);
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Structure* createIteratorResultObjectStructure(VM&, JSGlobalObject&);
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JS_EXPORT_PRIVATE JSValue iteratorMethod(ExecState&, JSObject*);
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JS_EXPORT_PRIVATE IterationRecord iteratorForIterable(ExecState&, JSObject*, JSValue iteratorMethod);
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JS_EXPORT_PRIVATE IterationRecord iteratorForIterable(ExecState*, JSValue iterable);
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JS_EXPORT_PRIVATE JSValue iteratorMethod(ExecState&, JSObject*);
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JS_EXPORT_PRIVATE bool hasIteratorMethod(ExecState&, JSValue);
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template<typename CallBackType>
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void forEachInIterable(ExecState* exec, JSValue iterable, const CallBackType& callback)
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{
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auto& vm = exec->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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IterationRecord iterationRecord = iteratorForIterable(exec, iterable);
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RETURN_IF_EXCEPTION(scope, void());
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while (true) {
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JSValue next = iteratorStep(exec, iterationRecord);
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if (UNLIKELY(scope.exception()) || next.isFalse())
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return;
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JSValue nextValue = iteratorValue(exec, next);
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RETURN_IF_EXCEPTION(scope, void());
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callback(vm, exec, nextValue);
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if (UNLIKELY(scope.exception())) {
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scope.release();
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iteratorClose(exec, iterationRecord);
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return;
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}
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}
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}
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template<typename CallBackType>
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void forEachInIterable(ExecState& state, JSObject* iterable, JSValue iteratorMethod, const CallBackType& callback)
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{
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auto& vm = state.vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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auto iterationRecord = iteratorForIterable(state, iterable, iteratorMethod);
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RETURN_IF_EXCEPTION(scope, void());
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while (true) {
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JSValue next = iteratorStep(&state, iterationRecord);
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if (UNLIKELY(scope.exception()) || next.isFalse())
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return;
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JSValue nextValue = iteratorValue(&state, next);
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RETURN_IF_EXCEPTION(scope, void());
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callback(vm, state, nextValue);
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if (UNLIKELY(scope.exception())) {
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scope.release();
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iteratorClose(&state, iterationRecord);
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return;
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}
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}
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}
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} // namespace JSC
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