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 #include "jerryscript_native_function.h"
17
18 namespace {
19 jerry_object_native_info_t g_freeCallback = {
__anon34b1a4ae0202() 20 .free_cb = [](void* nativePointer) -> void {
21 delete ((NativeFunctionInfo*)nativePointer);
22 }
23 };
24 } // namespace
25
JerryScriptNativeFunction(JerryScriptNativeEngine * engine,const char * name,NativeCallback cb,void * value)26 JerryScriptNativeFunction::JerryScriptNativeFunction(JerryScriptNativeEngine* engine,
27 const char* name,
28 NativeCallback cb,
29 void* value)
30 : JerryScriptNativeObject(engine, jerry_create_external_function(NativeFunctionCallback))
31 {
32 NativeFunctionInfo* functionInfo = new NativeFunctionInfo();
33 functionInfo->data = value;
34 functionInfo->callback = cb;
35 functionInfo->engine = engine;
36 jerry_set_object_native_pointer(value_, functionInfo, &g_freeCallback);
37 }
38
JerryScriptNativeFunction(JerryScriptNativeEngine * engine,jerry_value_t value)39 JerryScriptNativeFunction::JerryScriptNativeFunction(JerryScriptNativeEngine* engine, jerry_value_t value)
40 : JerryScriptNativeObject(engine, value)
41 {
42 }
43
~JerryScriptNativeFunction()44 JerryScriptNativeFunction::~JerryScriptNativeFunction() {}
45
GetInterface(int interfaceId)46 void* JerryScriptNativeFunction::GetInterface(int interfaceId)
47 {
48 return (NativeFunction::INTERFACE_ID == interfaceId) ? (NativeFunction*)this
49 : JerryScriptNativeObject::GetInterface(interfaceId);
50 }
51
NativeFunctionCallback(const jerry_value_t function,const jerry_value_t thisVal,const jerry_value_t args[],const jerry_length_t argc)52 jerry_value_t JerryScriptNativeFunction::NativeFunctionCallback(const jerry_value_t function,
53 const jerry_value_t thisVal,
54 const jerry_value_t args[],
55 const jerry_length_t argc)
56 {
57 NativeFunctionInfo* functionInfo = nullptr;
58 jerry_get_object_native_pointer(function, (void**)&functionInfo, &g_freeCallback);
59 auto engine = (JerryScriptNativeEngine*)functionInfo->engine;
60
61 NativeScopeManager* scopeManager = engine->GetScopeManager();
62 NativeScope* scope = scopeManager->Open();
63
64 NativeCallbackInfo callbackInfo;
65 callbackInfo.thisVar = JerryScriptNativeEngine::JerryValueToNativeValue(engine, jerry_acquire_value(thisVal));
66 callbackInfo.function = JerryScriptNativeEngine::JerryValueToNativeValue(engine, jerry_acquire_value(function));
67 callbackInfo.argc = argc;
68 callbackInfo.argv = nullptr;
69
70 if (argc > 0) {
71 callbackInfo.argv = new NativeValue*[argc];
72 for (uint32_t i = 0; i < argc; i++) {
73 callbackInfo.argv[i] =
74 JerryScriptNativeEngine::JerryValueToNativeValue(engine, jerry_acquire_value(args[i]));
75 }
76 }
77
78 NativeValue* result = functionInfo->callback(functionInfo->engine, &callbackInfo);
79
80 if (callbackInfo.argv != nullptr) {
81 delete[] callbackInfo.argv;
82 }
83
84 jerry_value_t ret = 0;
85 if (result != nullptr) {
86 ret = jerry_acquire_value(*result);
87 } else if (engine->IsExceptionPending()) {
88 ret = jerry_acquire_value(*engine->GetAndClearLastException());
89 } else {
90 ret = jerry_create_undefined();
91 }
92
93 scopeManager->Close(scope);
94 return ret;
95 }
96