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logger.hpp
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logger.hpp
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#pragma once
#ifndef UTIL_LOGGER_HPP
#define UTIL_LOGGER_HPP
#include <chrono>
#include <iomanip>
#include <iostream>
#include <sstream>
namespace util
{
enum class LogLevel
{
Error = 0,
Warning = 1,
Info = 2,
Debug = 3,
Verbose = 4
};
class Logger
{
public:
using Logger_clock = std::chrono::system_clock;
static Logger &instance()
{
static Logger log;
return log;
}
void init(LogLevel level)
{
m_log_level = level;
m_start_time = Logger_clock::now();
}
template <typename... Args>
void error(Args &&...args) const
{
write_log(LogLevel::Error, std::forward<Args>(args)...);
}
template <typename... Args>
void error_stop(Args &&...args) const
{
write_log(LogLevel::Error, std::forward<Args>(args)...);
std::exit(-1);
}
template <typename... Args>
void warn(Args &&...args) const
{
write_log(LogLevel::Warning, std::forward<Args>(args)...);
}
template <typename... Args>
void info(Args &&...args) const
{
write_log(LogLevel::Info, std::forward<Args>(args)...);
}
template <typename... Args>
void debug(Args &&...args) const
{
write_log(LogLevel::Debug, std::forward<Args>(args)...);
}
template <typename... Args>
void verbose(Args &&...args) const
{
write_log(LogLevel::Verbose, std::forward<Args>(args)...);
}
private:
LogLevel m_log_level;
Logger_clock::time_point m_start_time;
private:
Logger() = default;
Logger(const Logger &) = delete;
Logger &operator=(const Logger &) = delete;
Logger(Logger &&) = delete;
Logger &operator=(Logger &&) = delete;
template <typename... Args>
void write_log(LogLevel level, Args &&...args) const
{
if (static_cast<int>(level) > static_cast<int>(m_log_level))
return;
auto now_time = Logger_clock::now();
auto dura = now_time - m_start_time;
std::ostringstream oss;
auto hours = std::chrono::floor<std::chrono::hours>(dura).count() % 24;
auto minutes = std::chrono::floor<std::chrono::minutes>(dura).count() % 60;
auto seconds = std::chrono::floor<std::chrono::seconds>(dura).count() % 60;
oss << std::setfill('0') << '[';
oss << std::setw(2) << hours << ':';
oss << std::setw(2) << minutes << ':';
oss << std::setw(2) << seconds << "] ";
oss << std::setfill(' ');
(oss << ... << args) << '\n';
std::cout << oss.str();
std::cout.flush();
}
};
inline void log_init(LogLevel level)
{
Logger::instance().init(level);
}
template <typename... Args>
inline void log_error(Args &&...args)
{
Logger::instance().error(std::forward<Args>(args)...);
}
template <typename... Args>
inline void log_error_stop(Args &&...args)
{
Logger::instance().error_stop(std::forward<Args>(args)...);
}
template <typename... Args>
inline void log_warn(Args &&...args)
{
Logger::instance().warn(std::forward<Args>(args)...);
}
template <typename... Args>
inline void log_info(Args &&...args)
{
Logger::instance().info(std::forward<Args>(args)...);
}
template <typename... Args>
inline void log_debug(Args &&...args)
{
Logger::instance().debug(std::forward<Args>(args)...);
}
template <typename... Args>
inline void log_verbose(Args &&...args)
{
Logger::instance().verbose(std::forward<Args>(args)...);
}
} // end namespace util
#endif // UTIL_LOGGER_HPP