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/*
* Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
* Copyright (C) 2016 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSCJSValue.h"
#include "JSObject.h"
#include "ThrowScope.h"
namespace JSC {
struct IterationRecord {
JSValue iterator;
JSValue nextMethod;
};
JSValue iteratorNext(ExecState*, IterationRecord, JSValue argument = JSValue());
JS_EXPORT_PRIVATE JSValue iteratorValue(ExecState*, JSValue iterResult);
bool iteratorComplete(ExecState*, JSValue iterResult);
JS_EXPORT_PRIVATE JSValue iteratorStep(ExecState*, IterationRecord);
JS_EXPORT_PRIVATE void iteratorClose(ExecState*, IterationRecord);
JS_EXPORT_PRIVATE JSObject* createIteratorResultObject(ExecState*, JSValue, bool done);
Structure* createIteratorResultObjectStructure(VM&, JSGlobalObject&);
JS_EXPORT_PRIVATE JSValue iteratorMethod(ExecState&, JSObject*);
JS_EXPORT_PRIVATE IterationRecord iteratorForIterable(ExecState&, JSObject*, JSValue iteratorMethod);
JS_EXPORT_PRIVATE IterationRecord iteratorForIterable(ExecState*, JSValue iterable);
JS_EXPORT_PRIVATE JSValue iteratorMethod(ExecState&, JSObject*);
JS_EXPORT_PRIVATE bool hasIteratorMethod(ExecState&, JSValue);
template<typename CallBackType>
void forEachInIterable(ExecState* exec, JSValue iterable, const CallBackType& callback)
{
auto& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
IterationRecord iterationRecord = iteratorForIterable(exec, iterable);
RETURN_IF_EXCEPTION(scope, void());
while (true) {
JSValue next = iteratorStep(exec, iterationRecord);
if (UNLIKELY(scope.exception()) || next.isFalse())
return;
JSValue nextValue = iteratorValue(exec, next);
RETURN_IF_EXCEPTION(scope, void());
callback(vm, exec, nextValue);
if (UNLIKELY(scope.exception())) {
scope.release();
iteratorClose(exec, iterationRecord);
return;
}
}
}
template<typename CallBackType>
void forEachInIterable(ExecState& state, JSObject* iterable, JSValue iteratorMethod, const CallBackType& callback)
{
auto& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto iterationRecord = iteratorForIterable(state, iterable, iteratorMethod);
RETURN_IF_EXCEPTION(scope, void());
while (true) {
JSValue next = iteratorStep(&state, iterationRecord);
if (UNLIKELY(scope.exception()) || next.isFalse())
return;
JSValue nextValue = iteratorValue(&state, next);
RETURN_IF_EXCEPTION(scope, void());
callback(vm, state, nextValue);
if (UNLIKELY(scope.exception())) {
scope.release();
iteratorClose(&state, iterationRecord);
return;
}
}
}
} // namespace JSC