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_LAYOUT_INFO_H 17 #define ECMASCRIPT_LAYOUT_INFO_H 18 19 #include "ecmascript/tagged_array.h" 20 #include "ecmascript/property_attributes.h" 21 #include "ecmascript/js_object.h" 22 23 namespace panda::ecmascript { 24 struct Properties { 25 JSTaggedValue key_; 26 JSTaggedValue attr_; 27 }; 28 29 class LayoutInfo : private TaggedArray { 30 public: 31 static constexpr int MIN_PROPERTIES_LENGTH = JSObject::MIN_PROPERTIES_LENGTH; 32 static constexpr int MAX_PROPERTIES_LENGTH = PropertyAttributes::MAX_CAPACITY_OF_PROPERTIES; 33 static constexpr int NUMBER_OF_PROPERTIES_INDEX = 0; 34 static constexpr int ELEMENTS_START_INDEX = 1; 35 Cast(ObjectHeader * obj)36 inline static LayoutInfo *Cast(ObjectHeader *obj) 37 { 38 ASSERT(JSTaggedValue(obj).IsTaggedArray()); 39 return reinterpret_cast<LayoutInfo *>(obj); 40 } 41 42 int GetPropertiesCapacity() const; 43 int NumberOfElements() const; 44 void SetNumberOfElements(const JSThread *thread, int properties); 45 uint32_t GetKeyIndex(int index) const; 46 uint32_t GetAttrIndex(int index) const; 47 void SetPropertyInit(const JSThread *thread, int index, const JSTaggedValue &key, const PropertyAttributes &attr); 48 void SetKey(const JSThread *thread, int index, const JSTaggedValue &key); 49 void SetNormalAttr(const JSThread *thread, int index, const PropertyAttributes &attr); 50 JSTaggedValue GetKey(int index) const; 51 PropertyAttributes GetAttr(int index) const; 52 JSTaggedValue GetSortedKey(int index) const; 53 uint32_t GetSortedIndex(int index) const; 54 void SetSortedIndex(const JSThread *thread, int index, int sortedIndex); 55 void AddKey(const JSThread *thread, int index, const JSTaggedValue &key, const PropertyAttributes &attr); 56 GetLength()57 inline uint32_t GetLength() const 58 { 59 return TaggedArray::GetLength(); 60 } 61 GetProperties()62 inline Properties *GetProperties() const 63 { 64 return reinterpret_cast<Properties *>(reinterpret_cast<uintptr_t>(this) + TaggedArray::DATA_OFFSET + 65 ELEMENTS_START_INDEX * JSTaggedValue::TaggedTypeSize()); 66 } 67 ComputeArrayLength(uint32_t properties_number)68 static inline uint32_t ComputeArrayLength(uint32_t properties_number) 69 { 70 return (properties_number << 1U) + ELEMENTS_START_INDEX; 71 } 72 ComputeGrowCapacity(uint32_t old_capacity)73 static inline uint32_t ComputeGrowCapacity(uint32_t old_capacity) 74 { 75 uint32_t new_capacity = old_capacity + MIN_PROPERTIES_LENGTH; 76 return new_capacity > MAX_PROPERTIES_LENGTH ? MAX_PROPERTIES_LENGTH : new_capacity; 77 } 78 79 int FindElementWithCache(JSThread *thread, JSHClass *cls, JSTaggedValue key, int propertiesNumber); 80 int FindElement(JSTaggedValue key, int propertiesNumber); 81 int BinarySearch(JSTaggedValue key, int propertiesNumber); 82 void GetAllKeys(const JSThread *thread, int end, int offset, TaggedArray *keyArray); 83 void GetAllKeys(const JSThread *thread, int end, std::vector<JSTaggedValue> &keyVector); 84 void GetAllEnumKeys(const JSThread *thread, int end, int offset, TaggedArray *keyArray, uint32_t *keys); 85 void GetAllNames(const JSThread *thread, int end, const JSHandle<TaggedArray> &keyArray, uint32_t *length); 86 87 DECL_DUMP() 88 }; 89 } // namespace panda::ecmascript 90 91 #endif // ECMASCRIPT_LAYOUT_INFO_H 92