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#include "base/clock_mock.h"

#include <ctime>

namespace mozc {

ClockMock::ClockMock(uint64 sec, uint32 usec)
  : seconds_(sec), micro_seconds_(usec) {
}

ClockMock::~ClockMock() {}

void ClockMock::GetTimeOfDay(uint64 *sec, uint32 *usec) {
  *sec = seconds_;
  *usec = micro_seconds_;
}

uint64 ClockMock::GetTime() {
  return seconds_;
}

bool ClockMock::GetTmWithOffsetSecond(time_t offset_sec, tm *output) {
  const time_t current_sec = static_cast<time_t>(seconds_);
  const time_t modified_sec = current_sec + offset_sec;

#ifdef OS_WINDOWS
  if (_gmtime64_s(output, &modified_sec) != 0) {
    return false;
  }
#else
  if (gmtime_r(&modified_sec, output) == NULL) {
    return false;
  }
#endif
  return true;
}

void ClockMock::PutClockForward(uint64 delta_sec, uint32 delta_usec) {
  const uint32 one_second = 1000000u;

  if (micro_seconds_ + delta_usec < one_second) {
    seconds_ += delta_sec;
    micro_seconds_ += delta_usec;
  } else {
    seconds_ += delta_sec + 1uLL;
    micro_seconds_ += delta_usec - one_second;
  }
}

}  // namespace mozc