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https://gitee.com/openharmony/arkcompiler_ets_runtime
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224 lines
10 KiB
C++
224 lines
10 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "js_iterator.h"
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#include "ecma_macros.h"
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#include "ecma_vm.h"
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#include "ecmascript/accessor_data.h"
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#include "ecmascript/interpreter/interpreter.h"
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#include "global_env.h"
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#include "js_symbol.h"
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#include "object_factory.h"
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namespace panda::ecmascript {
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JSTaggedValue JSIterator::IteratorCloseAndReturn(JSThread *thread, const JSHandle<JSTaggedValue> &iter)
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{
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ASSERT(thread->HasPendingException());
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ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
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JSTaggedValue exception = thread->GetException();
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JSHandle<JSTaggedValue> record = JSHandle<JSTaggedValue>(factory->NewCompletionRecord(CompletionRecordType::THROW,
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JSHandle<JSTaggedValue>(thread, exception)));
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JSHandle<JSTaggedValue> result = JSIterator::IteratorClose(thread, iter, record);
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if (result->IsCompletionRecord()) {
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return CompletionRecord::Cast(result->GetTaggedObject())->GetValue();
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}
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return result.GetTaggedValue();
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}
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JSHandle<JSTaggedValue> JSIterator::GetIterator(JSThread *thread, const JSHandle<JSTaggedValue> &obj)
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{
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// 1.ReturnIfAbrupt(obj).
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, obj);
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// 2.If method was not passed, then
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JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
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JSHandle<JSTaggedValue> iteratorSymbol = env->GetIteratorSymbol();
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JSHandle<JSTaggedValue> func = JSObject::GetMethod(thread, obj, iteratorSymbol);
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, obj);
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return GetIterator(thread, obj, func);
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}
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JSHandle<JSTaggedValue> JSIterator::GetIterator(JSThread *thread, const JSHandle<JSTaggedValue> &obj,
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const JSHandle<JSTaggedValue> &method)
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{
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// 1.ReturnIfAbrupt(obj).
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, obj);
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// 3.Let iterator be Call(method,obj).
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JSHandle<JSTaggedValue> undefined = thread->GlobalConstants()->GetHandledUndefined();
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EcmaRuntimeCallInfo info = EcmaInterpreter::NewRuntimeCallInfo(thread, method, obj, undefined, 0);
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JSTaggedValue ret = JSFunction::Call(&info);
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JSHandle<JSTaggedValue> iter(thread, ret);
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// 4.ReturnIfAbrupt(iterator).
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, iter);
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// 5.If Type(iterator) is not Object, throw a TypeError exception
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if (!iter->IsECMAObject()) {
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THROW_TYPE_ERROR_AND_RETURN(thread, "", undefined);
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}
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return iter;
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} // namespace panda::ecmascript
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// 7.4.2
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JSHandle<JSObject> JSIterator::IteratorNext(JSThread *thread, const JSHandle<JSTaggedValue> &iter)
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{
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// 1.If value was not passed, then Let result be Invoke(iterator, "next", « »).
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JSHandle<JSTaggedValue> key(thread->GlobalConstants()->GetHandledNextString());
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JSHandle<JSTaggedValue> next(JSObject::GetMethod(thread, iter, key));
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JSHandle<JSTaggedValue> undefined = thread->GlobalConstants()->GetHandledUndefined();
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EcmaRuntimeCallInfo info = EcmaInterpreter::NewRuntimeCallInfo(thread, next, iter, undefined, 0);
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JSTaggedValue ret = JSFunction::Call(&info);
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JSHandle<JSObject> result(thread, ret);
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// 3.ReturnIfAbrupt(result)
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, result);
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// 4.If Type(result) is not Object, throw a TypeError exception.
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if (!result.GetTaggedValue().IsECMAObject()) {
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THROW_TYPE_ERROR_AND_RETURN(thread, "", result);
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}
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return result;
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}
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JSHandle<JSObject> JSIterator::IteratorNext(JSThread *thread, const JSHandle<JSTaggedValue> &iter,
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const JSHandle<JSTaggedValue> &value)
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{
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// 2.Let result be Invoke(iterator, "next", «value»).
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JSHandle<JSTaggedValue> key(thread->GlobalConstants()->GetHandledNextString());
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JSHandle<JSTaggedValue> next(JSObject::GetMethod(thread, iter, key));
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JSHandle<JSTaggedValue> undefined = thread->GlobalConstants()->GetHandledUndefined();
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EcmaRuntimeCallInfo info = EcmaInterpreter::NewRuntimeCallInfo(thread, next, iter, undefined, 1);
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info.SetCallArg(value.GetTaggedValue());
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JSTaggedValue ret = JSFunction::Call(&info);
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JSHandle<JSObject> result(thread, ret);
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// 3.ReturnIfAbrupt(result)
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, result);
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// 4.If Type(result) is not Object, throw a TypeError exception.
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if (!result.GetTaggedValue().IsECMAObject()) {
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THROW_TYPE_ERROR_AND_RETURN(thread, "", result);
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}
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return result;
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}
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// 7.4.3
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bool JSIterator::IteratorComplete(JSThread *thread, const JSHandle<JSTaggedValue> &iterResult)
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{
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ASSERT_PRINT(iterResult->IsECMAObject(), "iterResult must be JSObject");
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// Return ToBoolean(Get(iterResult, "done")).
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JSHandle<JSTaggedValue> doneStr = thread->GlobalConstants()->GetHandledDoneString();
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JSHandle<JSTaggedValue> done = JSTaggedValue::GetProperty(thread, iterResult, doneStr).GetValue();
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, false);
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return done->ToBoolean();
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}
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// 7.4.4
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JSHandle<JSTaggedValue> JSIterator::IteratorValue(JSThread *thread, const JSHandle<JSTaggedValue> &iterResult)
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{
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ASSERT_PRINT(iterResult->IsECMAObject(), "iterResult must be JSObject");
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// Return Get(iterResult, "value").
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JSHandle<JSTaggedValue> valueStr = thread->GlobalConstants()->GetHandledValueString();
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JSHandle<JSTaggedValue> value = JSTaggedValue::GetProperty(thread, iterResult, valueStr).GetValue();
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return value;
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}
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// 7.4.5
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JSHandle<JSTaggedValue> JSIterator::IteratorStep(JSThread *thread, const JSHandle<JSTaggedValue> &iter)
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{
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// 1.Let result be IteratorNext(iterator).
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JSHandle<JSTaggedValue> result(IteratorNext(thread, iter));
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// 2.ReturnIfAbrupt(result).
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, result);
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// 3.Let done be IteratorComplete(result).
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bool done = IteratorComplete(thread, result);
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// 4.ReturnIfAbrupt(done).
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JSHandle<JSTaggedValue> doneHandle(thread, JSTaggedValue(done));
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, doneHandle);
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// 5.If done is true, return false.
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if (done) {
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JSHandle<JSTaggedValue> falseHandle(thread, JSTaggedValue::False());
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return falseHandle;
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}
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return result;
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}
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// 7.4.6
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JSHandle<JSTaggedValue> JSIterator::IteratorClose(JSThread *thread, const JSHandle<JSTaggedValue> &iter,
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const JSHandle<JSTaggedValue> &completion)
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{
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// 1.Assert: Type(iterator) is Object.
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ASSERT_PRINT(iter->IsECMAObject(), "iter must be JSObject");
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const GlobalEnvConstants *globalConst = thread->GlobalConstants();
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JSHandle<JSTaggedValue> exceptionOnThread;
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if (thread->HasPendingException()) {
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exceptionOnThread = JSHandle<JSTaggedValue>(thread, thread->GetException());
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thread->ClearException();
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}
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JSHandle<JSTaggedValue> returnStr(globalConst->GetHandledReturnString());
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// 3.Let return be GetMethod(iterator, "return").
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JSHandle<JSTaggedValue> returnFunc(JSObject::GetMethod(thread, iter, returnStr));
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// 4.ReturnIfAbrupt(return).
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RETURN_VALUE_IF_ABRUPT_COMPLETION(thread, returnFunc);
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// 5.If return is undefined, return Completion(completion).
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if (returnFunc->IsUndefined()) {
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if (!exceptionOnThread.IsEmpty()) {
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thread->SetException(exceptionOnThread.GetTaggedValue());
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}
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return completion;
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}
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// 6.Let innerResult be Call(return, iterator, « »).
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JSHandle<JSTaggedValue> undefined = globalConst->GetHandledUndefined();
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EcmaRuntimeCallInfo info = EcmaInterpreter::NewRuntimeCallInfo(thread, returnFunc, iter, undefined, 0);
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JSTaggedValue ret = JSFunction::Call(&info);
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if (!exceptionOnThread.IsEmpty()) {
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thread->SetException(exceptionOnThread.GetTaggedValue());
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}
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JSHandle<JSTaggedValue> innerResult(thread, ret);
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JSHandle<CompletionRecord> completionRecord(thread, globalConst->GetUndefined());
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if (completion->IsCompletionRecord()) {
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completionRecord = JSHandle<CompletionRecord>::Cast(completion);
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}
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// 7.If completion.[[type]] is throw, return Completion(completion).
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if (!completionRecord.GetTaggedValue().IsUndefined() && completionRecord->IsThrow()) {
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if (!exceptionOnThread.IsEmpty()) {
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thread->SetException(exceptionOnThread.GetTaggedValue());
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}
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return completion;
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}
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// 8.If innerResult.[[type]] is throw, return Completion(innerResult).
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if (thread->HasPendingException()) {
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return innerResult;
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}
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// 9.If Type(innerResult.[[value]]) is not Object, throw a TypeError exception.
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if (!innerResult->IsECMAObject()) {
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THROW_TYPE_ERROR_AND_RETURN(thread, "", undefined);
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}
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if (!exceptionOnThread.IsEmpty()) {
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thread->SetException(exceptionOnThread.GetTaggedValue());
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}
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return completion;
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}
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// 7.4.7
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JSHandle<JSObject> JSIterator::CreateIterResultObject(JSThread *thread, const JSHandle<JSTaggedValue> &value, bool done)
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{
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ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
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JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
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auto globalConst = thread->GlobalConstants();
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JSHandle<JSTaggedValue> constructor(env->GetObjectFunction());
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JSHandle<JSTaggedValue> valueStr = globalConst->GetHandledValueString();
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JSHandle<JSTaggedValue> doneStr = globalConst->GetHandledDoneString();
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JSHandle<JSTaggedValue> doneValue(thread, JSTaggedValue(done));
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// 2. Let obj be OrdinaryObjectCreate(%Object.prototype%).
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JSHandle<JSObject> obj(factory->NewJSObjectByConstructor(JSHandle<JSFunction>(constructor), constructor));
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// 3. Perform ! CreateDataPropertyOrThrow(obj, "value", value).
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// 4. Perform ! CreateDataPropertyOrThrow(obj, "done", done).
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JSObject::CreateDataPropertyOrThrow(thread, obj, valueStr, value);
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JSObject::CreateDataPropertyOrThrow(thread, obj, doneStr, doneValue);
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ASSERT_NO_ABRUPT_COMPLETION(thread);
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// 5. Return obj.
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return obj;
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}
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} // namespace panda::ecmascript
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