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 #ifndef USCRIPT_INTERPRETER_H
16 #define USCRIPT_INTERPRETER_H
17 
18 #include "script_context.h"
19 #include "script_expression.h"
20 #include "script_function.h"
21 #include "script_manager_impl.h"
22 #include "script_param.h"
23 #include "script_statement.h"
24 
25 #define INTERPRETER_LOGE(inter, context, format, ...) \
26     Logger(Updater::ERROR, (UPDATER_LOG_FILE_NAME), (__LINE__), \
27     "[INTERPRETER %d-%d]"#format, (inter).GetInstanceId(), (context)->GetContextId(), ##__VA_ARGS__)
28 #define INTERPRETER_LOGI(inter, context, format, ...) \
29     Logger(Updater::INFO, (UPDATER_LOG_FILE_NAME), (__LINE__), \
30     "[INTERPRETER %d-%d]"#format, (inter).GetInstanceId(), (context)->GetContextId(), ##__VA_ARGS__)
31 #define INTERPRETER_LOGD(inter, context, format, ...) \
32     Logger(Updater::DEBUG, (UPDATER_LOG_FILE_NAME), (__LINE__), \
33     "[INTERPRETER %d-%d]"#format, (inter).GetInstanceId(), (context)->GetContextId(), ##__VA_ARGS__)
34 
35 namespace Uscript {
36 class Parser;
37 class Scanner;
38 class ScriptManagerImpl;
39 
40 class ScriptInterpreter {
41 public:
42     static int32_t ExecuteScript(ScriptManagerImpl *manager, Hpackage::PkgManager::StreamPtr pkgStream);
43 
44     explicit ScriptInterpreter(ScriptManagerImpl *manager);
45     ~ScriptInterpreter();
46 
47     void AddStatement(UScriptStatement *statement);
48     int32_t AddFunction(ScriptFunction *function);
49     bool IsNativeFunction(std::string name);
50     UScriptValuePtr ExecuteNativeFunc(UScriptContextPtr upContext, const std::string &name,
51         ScriptParams *params);
52     UScriptValuePtr ExecuteFunction(UScriptContextPtr context, const std::string &name,
53         ScriptParams *params);
54     UScriptValuePtr FindVariable(UScriptContextPtr local, std::string id);
55     UScriptValuePtr UpdateVariable(UScriptContextPtr local, std::string id, UScriptValuePtr var);
GetInstanceId()56     int32_t GetInstanceId() const
57     {
58         return instanceId_;
59     }
60 
ContextPush(UScriptContextPtr context)61     void ContextPush(UScriptContextPtr context)
62     {
63         contextStack_.push_back(context);
64     }
ContextPop()65     void ContextPop()
66     {
67         contextStack_.pop_back();
68     }
69 
70 private:
71     int32_t LoadScript(Hpackage::PkgManager::StreamPtr pkgStream);
72     int32_t Execute();
73 
74 private:
75     ScriptFunction* FindFunction(const std::string &name);
76     UScriptStatementList* statements_ = nullptr;
77     std::map<std::string, ScriptFunction*> functions_;
78     std::vector<UScriptContextPtr> contextStack_;
79     ScriptManagerImpl* scriptManager_ = nullptr;
80     std::unique_ptr<Parser> parser_;
81     std::unique_ptr<Scanner> scanner_;
82     int32_t instanceId_ = 0;
83 };
84 } // namespace Uscript
85 #endif
86