1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SCOPE_H_ 18 #define SCOPE_H_ 19 20 #include <android-base/macros.h> 21 #include <android-base/logging.h> 22 #include <string> 23 #include <vector> 24 #include <map> 25 26 namespace android { 27 28 /* This class is used to represent declarations or notes 29 * which are otherwise not included in a HIDL HAL 30 */ 31 template<typename T> 32 struct Scope { ScopeScope33 Scope() {} ~ScopeScope34 ~Scope() {} 35 36 void enter(std::string name, T item); 37 void leave(std::string name); 38 39 T lookup(std::string name) const; 40 41 private: 42 std::map<std::string, T> mScopeContents; 43 44 DISALLOW_COPY_AND_ASSIGN(Scope); 45 }; 46 47 template<typename T> enter(std::string name,T item)48void Scope<T>::enter(std::string name, T item) { 49 auto it = mScopeContents.find(name); 50 51 if (it != mScopeContents.end()) { 52 LOG(WARNING) << "Redeclaring variable in scope: " << name; 53 return; 54 } 55 56 mScopeContents[name] = item; 57 } 58 59 template<typename T> leave(std::string name)60void Scope<T>::leave(std::string name) { 61 auto it = mScopeContents.find(name); 62 63 if (it == mScopeContents.end()) { 64 LOG(WARNING) << "Tried to undefined already undefined value in scope: " << name; 65 return; 66 } 67 68 mScopeContents.erase(it); 69 } 70 71 template<typename T> lookup(std::string name)72T Scope<T>::lookup(std::string name) const { 73 auto it = mScopeContents.find(name); 74 75 if (it == mScopeContents.end()) { 76 return NULL; 77 } 78 79 return (*it).second; 80 } 81 82 } // namespace android 83 84 #endif // SCOPE_H_