1 /* 2 * Copyright (C) 2018 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 ANDROID_VINTF_REGEX_H_ 18 #define ANDROID_VINTF_REGEX_H_ 19 20 #include <regex.h> 21 #include <string> 22 23 namespace android { 24 namespace vintf { 25 namespace details { 26 27 // A wrapper class around regex.h. This is used instead of C++ <regex> library because 28 // C++ regex library throws exceptions when an invalid regular expression is compiled. 29 // Use Extended Regular Expression (ERE) syntax. 30 class Regex { 31 public: 32 Regex() = default; 33 ~Regex(); 34 35 Regex& operator=(const Regex&) = delete; 36 Regex(const Regex&) = delete; 37 38 __attribute__((warn_unused_result)) bool compile(const std::string& pattern); 39 40 bool matches(const std::string& s) const; 41 42 /** 43 * Return nullptr if not a valid regex pattern, else the Regex object. 44 */ 45 static const Regex* Get(const std::string& pattern); 46 47 private: 48 std::unique_ptr<regex_t> mImpl; 49 50 void clear(); 51 }; 52 53 } // namespace details 54 } // namespace vintf 55 } // namespace android 56 57 #endif // ANDROID_VINTF_REGEX_H_ 58