cpp-logger/src/common.cxx

//
//  common.cxx
//  logging
//
//  Created by Sam Jaffe on 4/1/19.
//

#include "common.h"

#include <cassert>
#include <ctime>

#include "logger/exception.h"

namespace logging {
  timeval now() {
    struct timeval tv;
    gettimeofday( &tv, nullptr );
    return tv;
  }
  
#define X(token) if (lower_case == #token) return level::token; else
  level level_from_string(std::string const & str) {
    std::string lower_case;
    std::transform(str.begin(), str.end(),
                   std::back_inserter(lower_case), &tolower);
    LIST_OF_LOGGING_LEVELS
    throw invalid_property{str + " is not a log level"};
  }
#undef X
  
#define X(token) if (lvl == level::token) return #token; else
  char const * level_to_string(level lvl) {
    LIST_OF_LOGGING_LEVELS
    throw std::domain_error{"unknown logging level in switch"};
  }
#undef X
  
  std::string to_string(level lvl, bool uppercase) {
    std::string str = level_to_string(lvl);
    if (uppercase) {
      std::transform(str.begin(), str.end(), str.begin(), &toupper);
    }
    return str;
  }
  
  std::ostream & operator<<(std::ostream & os, level l) {
    return os << std::string(to_string(l, true));
  }
}