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https://gitee.com/openharmony/arkcompiler_ets_runtime
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1fe4846e88
Change-Id: I474a84db7d80ec0f5370a4f58df115963e21d90f Change-Id: I471252903083c4d2d15f389b23afbc6c5427f664
113 lines
3.8 KiB
C++
113 lines
3.8 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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#ifndef ECMASCRIPT_SYMBOL_TABLE_H
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#define ECMASCRIPT_SYMBOL_TABLE_H
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#include "ecmascript/ecma_string.h"
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#include "ecmascript/ecma_vm.h"
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#include "ecmascript/js_symbol.h"
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#include "ecmascript/js_thread.h"
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#include "ecmascript/object_factory.h"
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#include "ecmascript/tagged_hash_table.h"
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namespace panda::ecmascript {
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class SymbolTable : public TaggedHashTable<SymbolTable> {
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public:
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using HashTable = TaggedHashTable<SymbolTable>;
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static SymbolTable *Cast(TaggedObject *object)
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{
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return reinterpret_cast<SymbolTable *>(object);
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}
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inline static int GetKeyIndex(int entry)
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{
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return HashTable::TABLE_HEADER_SIZE + entry * GetEntrySize() + ENTRY_KEY_INDEX;
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}
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inline static int GetValueIndex(int entry)
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{
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return HashTable::TABLE_HEADER_SIZE + entry * GetEntrySize() + ENTRY_VALUE_INDEX;
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}
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inline static int GetEntryIndex(int entry)
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{
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return HashTable::TABLE_HEADER_SIZE + entry * GetEntrySize();
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}
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inline static int GetEntrySize()
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{
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return ENTRY_SIZE;
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}
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static inline bool IsMatch(const JSTaggedValue &name, const JSTaggedValue &other)
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{
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if (name.IsHole() || name.IsUndefined()) {
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return false;
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}
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auto *nameString = static_cast<EcmaString *>(name.GetTaggedObject());
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auto *otherString = static_cast<EcmaString *>(other.GetTaggedObject());
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return EcmaStringAccessor::StringsAreEqual(nameString, otherString);
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}
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static inline uint32_t Hash(const JSTaggedValue &obj)
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{
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if (obj.IsHeapObject()) {
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if (obj.IsString()) {
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auto *nameString = static_cast<EcmaString *>(obj.GetTaggedObject());
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return EcmaStringAccessor(nameString).GetHashcode();
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}
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return JSSymbol::ComputeHash();
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}
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LOG_ECMA(FATAL) << "this branch is unreachable";
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UNREACHABLE();
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}
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static const int DEFAULT_ELEMENTS_NUMBER = 64;
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static JSHandle<SymbolTable> Create(JSThread *thread, int numberOfElements = DEFAULT_ELEMENTS_NUMBER)
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{
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return HashTable::Create(thread, numberOfElements);
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}
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inline bool ContainsKey(const JSTaggedValue &key)
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{
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int entry = FindEntry(key);
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return entry != -1;
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}
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inline JSTaggedValue GetSymbol(const JSTaggedValue &key)
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{
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int entry = FindEntry(key);
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ASSERT(entry != -1);
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return GetValue(entry);
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}
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inline JSTaggedValue FindSymbol(const JSTaggedValue &value)
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{
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JSSymbol *symbol = JSSymbol::Cast(value.GetTaggedObject());
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JSTaggedValue des = symbol->GetDescription();
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if (!des.IsUndefined()) {
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if (ContainsKey(des)) {
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return des;
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}
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}
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return JSTaggedValue::Undefined();
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}
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static int ComputeCompactSize([[maybe_unused]] const JSHandle<SymbolTable> &table, int computeHashTableSize,
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[[maybe_unused]] int tableSize, [[maybe_unused]] int addedElements)
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{
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return computeHashTableSize;
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}
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static constexpr int ENTRY_KEY_INDEX = 0;
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static constexpr int ENTRY_VALUE_INDEX = 1;
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static constexpr int ENTRY_SIZE = 2;
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};
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} // namespace panda::ecmascript
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#endif // ECMASCRIPT_SYMBOL_TABLE_H
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