// Copyright 2016 Google Inc.

//

// 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.!

#ifndef ABSL_LOG_LOG_H_

#define ABSL_LOG_LOG_H_

#include <iostream>

#include "third_party/absl/strings/string_view.h"

namespace absl {

enum LogSeverityAtLeast {

  LOG_INFO = 0,

  LOG_WARNING = 1,

  LOG_ERROR = 2,

  LOG_FATAL = 3,

  LOG_SEVERITY_SIZE = 4,

};

namespace logging {

class Die {

 public:

  explicit Die(bool die) : die_(die) {}

  Die() = delete;

  ~Die() {

    std::cerr << std::endl;

    if (die_) {

      std::cerr << "Program terminated with an unrecoverable error."

                << std::endl;

      std::exit(-1);

    }

  }

  int operator&(std::ostream &) { return 0; }

 private:

  bool die_ = false;

};

inline absl::string_view BaseName(absl::string_view path) {

#ifdef OS_WIN

  const size_t pos = path.find_last_of('\\');

#else

  const size_t pos = path.find_last_of('/');

#endif

  return pos == absl::string_view::npos ? path : path.substr(pos + 1);

}

}  // namespace logging

}  // namespace absl

#define LOG(severity)                                                       \

  (::absl::MinLogLevel() > ::absl::LOG_##severity)                          \

      ? 0                                                                   \

      : ::absl::logging::Die(::absl::LOG_##severity >= ::absl::LOG_FATAL) & \

            std::cerr << ::absl::logging::BaseName(__FILE__) << "("         \

                      << __LINE__ << ") "                                   \

                      << "LOG(" << #severity << ") "

#endif  // ABSL_LOG_LOG_H_