/*
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* Copyright (C) 2018 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 ANDROID_VINTF_REGEX_H_
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#define ANDROID_VINTF_REGEX_H_
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#include <regex.h>
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#include <string>
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namespace android {
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namespace vintf {
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namespace details {
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// A wrapper class around regex.h. This is used instead of C++ <regex> library because
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// C++ regex library throws exceptions when an invalid regular expression is compiled.
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// Use Extended Regular Expression (ERE) syntax.
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class Regex {
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public:
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Regex() = default;
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~Regex();
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Regex& operator=(const Regex&) = delete;
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Regex(const Regex&) = delete;
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__attribute__((warn_unused_result)) bool compile(const std::string& pattern);
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bool matches(const std::string& s) const;
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/**
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* Return nullptr if not a valid regex pattern, else the Regex object.
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*/
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static const Regex* Get(const std::string& pattern);
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private:
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std::unique_ptr<regex_t> mImpl;
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void clear();
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};
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} // namespace details
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} // namespace vintf
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} // namespace android
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#endif // ANDROID_VINTF_REGEX_H_
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