1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef ECMASCRIPT_REGEXP_PARSER_CACHE_H 17 #define ECMASCRIPT_REGEXP_PARSER_CACHE_H 18 19 #include <array> 20 21 #include "ecmascript/ecma_string.h" 22 #include "ecmascript/js_tagged_value.h" 23 24 namespace panda::ecmascript { 25 class RegExpParserCache { 26 public: 27 RegExpParserCache(); 28 ~RegExpParserCache(); 29 static constexpr size_t CACHE_SIZE = 128; 30 31 bool IsInCache(EcmaString *pattern, const uint32_t flags); 32 std::pair<JSTaggedValue, size_t> GetCache(EcmaString *pattern, const uint32_t flags); 33 void SetCache(EcmaString *pattern, const uint32_t flags, const JSTaggedValue codeBuffer, const size_t bufferSize); 34 void Clear(); 35 36 private: 37 size_t GetHash(EcmaString *pattern, const uint32_t flags); 38 39 struct ParserKey { 40 EcmaString *pattern_{nullptr}; 41 uint32_t flags_{UINT32_MAX}; 42 JSTaggedValue codeBuffer_{JSTaggedValue::Hole()}; 43 size_t bufferSize_{0}; 44 }; 45 46 std::array<ParserKey, CACHE_SIZE> info_{}; 47 }; 48 } // namespace panda::ecmascript 49 #endif // ECMASCRIPT_REGEXP_PARSER_CACHE_H 50