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_JSARRAY_H 17 #define ECMASCRIPT_JSARRAY_H 18 19 #include <limits> 20 #include "ecmascript/js_object.h" 21 #include "ecmascript/js_tagged_value-inl.h" 22 #include "ecmascript/js_tagged_value.h" 23 #include "ecmascript/tagged_array.h" 24 25 namespace panda::ecmascript { 26 // ecma6 9.4.2 Array Exotic Object 27 class JSArray : public JSObject { 28 public: 29 static constexpr int LENGTH_INLINE_PROPERTY_INDEX = 0; 30 31 CAST_CHECK(JSArray, IsJSArray); 32 33 static JSHandle<JSTaggedValue> ArrayCreate(JSThread *thread, JSTaggedNumber length); 34 static JSHandle<JSTaggedValue> ArrayCreate(JSThread *thread, JSTaggedNumber length, 35 const JSHandle<JSTaggedValue> &newTarget); 36 static JSTaggedValue ArraySpeciesCreate(JSThread *thread, const JSHandle<JSObject> &originalArray, 37 JSTaggedNumber length); 38 static bool ArraySetLength(JSThread *thread, const JSHandle<JSObject> &array, const PropertyDescriptor &desc); 39 static bool DefineOwnProperty(JSThread *thread, const JSHandle<JSObject> &array, const JSHandle<JSTaggedValue> &key, 40 const PropertyDescriptor &desc); 41 static bool DefineOwnProperty(JSThread *thread, const JSHandle<JSObject> &array, uint32_t index, 42 const PropertyDescriptor &desc); 43 44 static bool IsLengthString(JSThread *thread, const JSHandle<JSTaggedValue> &key); 45 // ecma6 7.3 Operations on Objects 46 static JSHandle<JSArray> CreateArrayFromList(JSThread *thread, const JSHandle<TaggedArray> &elements); 47 // use first inlined property slot for array length GetArrayLength()48 inline uint32_t GetArrayLength() const 49 { 50 return GetLength().GetArrayLength(); 51 } 52 SetArrayLength(const JSThread * thread,uint32_t length)53 inline void SetArrayLength(const JSThread *thread, uint32_t length) 54 { 55 SetLength(thread, JSTaggedValue(length)); 56 } 57 58 static constexpr size_t LENGTH_OFFSET = JSObject::SIZE; 59 ACCESSORS(Length, LENGTH_OFFSET, SIZE); 60 61 DECL_VISIT_OBJECT_FOR_JS_OBJECT(JSObject, LENGTH_OFFSET, SIZE) 62 63 static const uint32_t MAX_ARRAY_INDEX = MAX_ELEMENT_INDEX; DECL_DUMP()64 DECL_DUMP() 65 66 static int32_t GetArrayLengthOffset() 67 { 68 return LENGTH_OFFSET; 69 } 70 71 static bool PropertyKeyToArrayIndex(JSThread *thread, const JSHandle<JSTaggedValue> &key, uint32_t *output); 72 73 static JSTaggedValue LengthGetter(JSThread *thread, const JSHandle<JSObject> &self); 74 75 static bool LengthSetter(JSThread *thread, const JSHandle<JSObject> &self, const JSHandle<JSTaggedValue> &value, 76 bool mayThrow = false); 77 78 static JSHandle<JSTaggedValue> FastGetPropertyByValue(JSThread *thread, const JSHandle<JSTaggedValue> &obj, 79 uint32_t index); 80 81 static JSHandle<JSTaggedValue> FastGetPropertyByValue(JSThread *thread, const JSHandle<JSTaggedValue> &obj, 82 const JSHandle<JSTaggedValue> &key); 83 84 static bool FastSetPropertyByValue(JSThread *thread, const JSHandle<JSTaggedValue> &obj, uint32_t index, 85 const JSHandle<JSTaggedValue> &value); 86 87 static bool FastSetPropertyByValue(JSThread *thread, const JSHandle<JSTaggedValue> &obj, 88 const JSHandle<JSTaggedValue> &key, const JSHandle<JSTaggedValue> &value); 89 90 private: 91 static void SetCapacity(JSThread *thread, const JSHandle<JSObject> &array, uint32_t oldLen, uint32_t newLen); 92 }; 93 } // namespace panda::ecmascript 94 95 #endif // ECMASCRIPT_JSARRAY_H 96