/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SCOPE_H_
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#define SCOPE_H_
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#include <android-base/macros.h>
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#include <android-base/logging.h>
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#include <string>
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#include <vector>
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#include <map>
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namespace android {
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/* This class is used to represent declarations or notes
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* which are otherwise not included in a HIDL HAL
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*/
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template<typename T>
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struct Scope {
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Scope() {}
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~Scope() {}
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void enter(std::string name, T item);
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void leave(std::string name);
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T lookup(std::string name) const;
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private:
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std::map<std::string, T> mScopeContents;
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DISALLOW_COPY_AND_ASSIGN(Scope);
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};
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template<typename T>
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void Scope<T>::enter(std::string name, T item) {
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auto it = mScopeContents.find(name);
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if (it != mScopeContents.end()) {
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LOG(WARNING) << "Redeclaring variable in scope: " << name;
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return;
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}
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mScopeContents[name] = item;
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}
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template<typename T>
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void Scope<T>::leave(std::string name) {
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auto it = mScopeContents.find(name);
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if (it == mScopeContents.end()) {
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LOG(WARNING) << "Tried to undefined already undefined value in scope: " << name;
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return;
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}
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mScopeContents.erase(it);
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}
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template<typename T>
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T Scope<T>::lookup(std::string name) const {
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auto it = mScopeContents.find(name);
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if (it == mScopeContents.end()) {
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return NULL;
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}
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return (*it).second;
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}
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} // namespace android
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#endif // SCOPE_H_
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