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https://gitee.com/openharmony/arkcompiler_ets_runtime
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86cfe52253
Signed-off-by: wanyanglan <wanyanglan1@huawei.com> Change-Id: Iac7851492f10c0ef1303c621febb65e5fdd22e41
73 lines
3.1 KiB
C++
73 lines
3.1 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_primitive_ref.h"
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#include "ecmascript/ecma_string-inl.h"
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#include "ecmascript/ecma_vm.h"
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#include "ecmascript/global_env.h"
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#include "ecmascript/mem/assert_scope-inl.h"
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#include "ecmascript/object_factory.h"
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namespace panda::ecmascript {
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// ES6 9.4.3.4 StringCreate( value, prototype)
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JSHandle<JSPrimitiveRef> JSPrimitiveRef::StringCreate(JSThread *thread, const JSHandle<JSTaggedValue> &value)
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{
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// 1. ReturnIfAbrupt(prototype).
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// 2. Assert: Type(value) is String.
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ASSERT(value->IsString());
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// 3. Let S be a newly created String exotic object.
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// 4. Set the [[StringData]] internal slot of S to value.
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ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
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JSHandle<JSTaggedValue> str(factory->NewJSString(value));
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// 11. Let length be the number of code unit elements in value.
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// 12. Let status be DefinePropertyOrThrow(S, "length", PropertyDescriptor{[[Value]]: length, [[Writable]]:
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// false, [[Enumerable]]: false, [[Configurable]]: false }).
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JSHandle<JSTaggedValue> lengthStr = thread->GlobalConstants()->GetHandledLengthString();
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int32_t length = EcmaString::Cast(value->GetTaggedObject())->GetLength();
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PropertyDescriptor desc(thread, JSHandle<JSTaggedValue>(thread, JSTaggedValue(length)), false, false, false);
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[[maybe_unused]] bool status = JSTaggedValue::DefinePropertyOrThrow(thread, str, lengthStr, desc);
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// 13. Assert: status is not an abrupt completion.
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// 14. Return S.
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ASSERT(status);
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return JSHandle<JSPrimitiveRef>(str);
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}
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bool JSPrimitiveRef::StringGetIndexProperty(const JSThread *thread, const JSHandle<JSObject> &obj, uint32_t index,
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PropertyDescriptor *desc)
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{
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uint16_t tmpChar;
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{
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DISALLOW_GARBAGE_COLLECTION;
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EcmaString *str = EcmaString::Cast(JSPrimitiveRef::Cast(*obj)->GetValue().GetTaggedObject());
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if (str->GetLength() <= index) {
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return false;
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}
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// 10. Let resultStr be a String value of length 1, containing one code unit from str, specifically the code
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// unit at index index
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tmpChar = str->At(index);
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}
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JSHandle<JSTaggedValue> value(thread->GetEcmaVM()->GetFactory()->NewFromUtf16(&tmpChar, 1));
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// 11. Return a PropertyDescriptor{ [[Value]]: resultStr, [[Enumerable]]: true, [[Writable]]: false,
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// [[Configurable]]: false }.
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desc->SetValue(value);
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desc->SetEnumerable(true);
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desc->SetWritable(false);
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desc->SetConfigurable(false);
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return true;
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}
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// ES6 9.4.3.3 [[OwnPropertyKeys]] ( )
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} // namespace panda::ecmascript
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