logging.hpp

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/* Copyright 2017 - 2024 R. Thomas
 * Copyright 2017 - 2024 Quarkslab
 *
 * 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 LIEF_LOGGING_H
#define LIEF_LOGGING_H
 
#include "LIEF/visibility.h"
 
#include <string>
#include <memory>
#include <vector>
#include <cstdint>
 
namespace spdlog {
class logger;
}
 
namespace LIEF {
namespace logging {
enum class LEVEL : uint32_t {
  OFF = 0,
 
  TRACE,
  DEBUG,
  INFO,
  WARN,
  ERR,
  CRITICAL,
};
LIEF_API LEVEL get_level();
 
LIEF_API const char* to_string(LEVEL e);
LIEF_API void disable();
LIEF_API void enable();
LIEF_API void set_level(LEVEL level);
LIEF_API void set_path(const std::string& path);
LIEF_API void log(LEVEL level, const std::string& msg);
 
LIEF_API void log(LEVEL level, const std::string& fmt,
                  const std::vector<std::string>& args);
 
template <typename... Args>
void log(LEVEL level, const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return log(level, fmt, vec_args);
}
 
LIEF_API void set_logger(std::shared_ptr<spdlog::logger> logger);
 
LIEF_API void reset();
 
inline void enable_debug() {
  set_level(LEVEL::DEBUG);
}
 
inline void debug(const std::string& msg) {
  log(LEVEL::DEBUG, msg);
}
 
inline void debug(const std::string& fmt, const std::vector<std::string>& args) {
  log(LEVEL::DEBUG, fmt, args);
}
 
template <typename... Args>
void debug(const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return debug(fmt, vec_args);
}
 
// -----------------------------------------------------------------------------
 
inline void info(const std::string& msg) {
  log(LEVEL::INFO, msg);
}
 
inline void info(const std::string& fmt, const std::vector<std::string>& args) {
  log(LEVEL::INFO, fmt, args);
}
 
template <typename... Args>
void info(const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return info(fmt, vec_args);
}
 
// -----------------------------------------------------------------------------
 
inline void warn(const std::string& msg) {
  log(LEVEL::WARN, msg);
}
 
inline void warn(const std::string& fmt, const std::vector<std::string>& args) {
  log(LEVEL::WARN, fmt, args);
}
 
template <typename... Args>
void warn(const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return warn(fmt, vec_args);
}
 
// -----------------------------------------------------------------------------
 
inline void err(const std::string& msg) {
  log(LEVEL::ERR, msg);
}
 
inline void err(const std::string& fmt, const std::vector<std::string>& args) {
  log(LEVEL::ERR, fmt, args);
}
 
template <typename... Args>
void err(const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return err(fmt, vec_args);
}
 
// -----------------------------------------------------------------------------
 
inline void critical(const std::string& msg) {
  log(LEVEL::CRITICAL, msg);
}
 
inline void critical(const std::string& fmt, const std::vector<std::string>& args) {
  log(LEVEL::CRITICAL, fmt, args);
}
 
template <typename... Args>
void critical(const std::string& fmt, const Args &... args) {
  std::vector<std::string> vec_args;
  vec_args.insert(vec_args.end(), { static_cast<decltype(vec_args)::value_type>(args)...});
  return critical(fmt, vec_args);
}
 
// -----------------------------------------------------------------------------
 
 
class Scoped {
  public:
  Scoped(const Scoped&) = delete;
  Scoped& operator=(const Scoped&) = delete;
 
  Scoped(Scoped&&) = delete;
  Scoped& operator=(Scoped&&) = delete;
 
  explicit Scoped(LEVEL level) :
    level_(get_level())
  {
    set_level(level);
  }
 
  const Scoped& set_level(LEVEL lvl) const {
    logging::set_level(lvl);
    return *this;
  }
 
  ~Scoped() {
    set_level(level_);
  }
 
  private:
  LEVEL level_ = LEVEL::INFO;
};
 
 
}

}

#endif