statsd/src/utils/Regex.h

/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <regex.h>

#include <memory>
#include <string>

namespace android {
namespace os {
namespace statsd {

class Regex {
public:
    Regex(regex_t impl);  // Do not use. It is public for std::make_unique. Use Regex::create.
    ~Regex();
    Regex& operator=(const Regex&) = delete;
    Regex(const Regex&) = delete;

    // Returns nullptr if pattern is not valid POSIX regex.
    static std::unique_ptr<Regex> create(const std::string& pattern);

    // Looks for a regex match in str and replaces the matched portion with replacement in-place.
    // Returns true if there was a match, false otherwise.
    bool replace(std::string& str, const std::string& replacement);

private:
    regex_t mImpl;
};

}  // namespace statsd
}  // namespace os
}  // namespace android