1 /*
2 * Copyright (c) 2021-2022 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 FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_ENGINE_QUICKJS_QJS_VALUE_CONVERSIONS_H
17 #define FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_ENGINE_QUICKJS_QJS_VALUE_CONVERSIONS_H
18
19 #include <string>
20
21 #include "frameworks/bridge/js_frontend/engine/quickjs/qjs_utils.h"
22
23 namespace __detail__ {
24
25 template<typename T>
26 struct _is_signed_int_ {
27 static constexpr bool value =
28 std::is_integral<T>::value && std::is_signed<T>::value && !std::is_same<T, bool>::value;
29 };
30
31 template<typename T>
32 static constexpr bool is_signed_int_v = _is_signed_int_<T>::value;
33
34 template<typename T>
fromJSValue(JSValueConst val)35 T fromJSValue(JSValueConst val)
36 {
37 static_assert(!std::is_const_v<T> && !std::is_reference_v<T>, //
38 "Cannot convert values to reference or cv-qualified types!");
39
40 JSContext* ctx = OHOS::Ace::Framework::QJSContext::Current();
41 if constexpr (is_signed_int_v<T>) {
42 int64_t res;
43 JS_ToInt64(ctx, &res, val);
44 return res;
45 } else if constexpr (std::is_unsigned_v<T>) {
46 uint32_t res;
47 JS_ToUint32(ctx, &res, val);
48 return res;
49 } else if constexpr (std::is_floating_point_v<T>) {
50 double res;
51 JS_ToFloat64(ctx, &res, val);
52 return res;
53 } else if constexpr (std::is_same_v<T, std::string>) {
54 OHOS::Ace::Framework::ScopedString str(val);
55 return str.str();
56 }
57
58 return T();
59 }
60
61 template<typename T>
toJSValue(T val)62 JSValue toJSValue(T val)
63 {
64 JSContext* ctx = OHOS::Ace::Framework::QJSContext::Current();
65 if constexpr (is_signed_int_v<T>) {
66 return JS_NewInt64(ctx, val);
67 } else if constexpr (std::is_unsigned_v<T>) {
68 return JS_NewInt64(ctx, val);
69 } else if constexpr (std::is_floating_point_v<T>) {
70 return JS_NewFloat64(ctx, val);
71 } else if constexpr (std::is_same_v<T, std::string>) {
72 return JS_NewStringLen(ctx, val.c_str(), val.size());
73 } else if constexpr (std::is_same_v<T, const char*>) {
74 return JS_NewStringLen(ctx, val, strlen(val));
75 }
76
77 return JS_ThrowInternalError(ctx, "Conversion failure...");
78 }
79
80 template<typename... Types>
81 struct TupleConverter {
operatorTupleConverter82 std::tuple<Types...> operator()(JSValueConst* argv)
83 {
84 int index = 0;
85 return {
86 __detail__::fromJSValue<Types>(argv[index++])...,
87 };
88 }
89 };
90
91 }; // namespace __detail__
92
93 namespace OHOS::Ace::Framework::QJSValueConvertor {
94
95 template<typename T>
toQJSValue(T && val)96 inline JSValue toQJSValue(T&& val)
97 {
98 return __detail__::toJSValue(std::forward<T>(val));
99 }
100
101 } // namespace OHOS::Ace::Framework::QJSValueConvertor
102
103 #endif // FRAMEWORKS_BRIDGE_DECLARATIVE_FRONTEND_ENGINE_QUICKJS_QJS_VALUE_CONVERSIONS_H
104