logger.cpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#include "logger.hpp"

#ifdef HAVE_CUSTOM_LOGGER
#error "This file should not be compiled when custom logger is used"
#endif

#include <ndn-cxx/util/time.hpp>
#include <cinttypes>
#include <stdio.h>
#include <type_traits>

namespace nfd {

Logger::Logger(const std::string& name, LogLevel level)
  : m_moduleName(name)
  , m_enabledLogLevel(level)
{
}

std::ostream&
operator<<(std::ostream& os, const LoggerTimestamp&)
{
  using namespace ndn::time;

  static const microseconds::rep ONE_SECOND = 1000000;
  microseconds::rep microsecondsSinceEpoch = duration_cast<microseconds>(
    system_clock::now().time_since_epoch()).count();

  // 10 (whole seconds) + '.' + 6 (fraction) + '\0'
  char buffer[10 + 1 + 6 + 1];
  BOOST_ASSERT_MSG(microsecondsSinceEpoch / ONE_SECOND <= 9999999999L,
                   "whole seconds cannot fit in 10 characters");

  static_assert(std::is_same<microseconds::rep, int_least64_t>::value,
                "PRIdLEAST64 is incompatible with microseconds::rep");
  // - std::snprintf not found in some environments
  //   http://redmine.named-data.net/issues/2299 for more information
  snprintf(buffer, sizeof(buffer), "%" PRIdLEAST64 ".%06" PRIdLEAST64,
           microsecondsSinceEpoch / ONE_SECOND,
           microsecondsSinceEpoch % ONE_SECOND);

  return os << buffer;
}

} // namespace nfd