/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This code is made available to you under your choice of the following sets

 * of licensing terms:

 */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 */

/* Copyright 2014 Mozilla Contributors

 *

 * 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.

 */

#include "pkix/Time.h"

#include "pkixutil.h"

#ifdef WIN32

#ifdef _MSC_VER

#pragma warning(push, 3)

#endif

#include "windows.h"

#ifdef _MSC_VER

#pragma warning(pop)

#endif

#else

#include "sys/time.h"

#endif

namespace mozilla { namespace pkix {

Time

Now()

{

  uint64_t seconds;

#ifdef WIN32

  // "Contains a 64-bit value representing the number of 100-nanosecond

  // intervals since January 1, 1601 (UTC)."

  //   - http://msdn.microsoft.com/en-us/library/windows/desktop/ms724284(v=vs.85).aspx

  FILETIME ft;

  GetSystemTimeAsFileTime(&ft);

  uint64_t ft64 = (static_cast<uint64_t>(ft.dwHighDateTime) << 32) |

                  ft.dwLowDateTime;

  seconds = (DaysBeforeYear(1601) * Time::ONE_DAY_IN_SECONDS) +

            ft64 / (1000u * 1000u * 1000u / 100u);

#else

  // "The gettimeofday() function shall obtain the current time, expressed as

  // seconds and microseconds since the Epoch."

  //   - http://pubs.opengroup.org/onlinepubs/009695399/functions/gettimeofday.html

  timeval tv;

  (void) gettimeofday(&tv, nullptr);

  seconds = (DaysBeforeYear(1970) * Time::ONE_DAY_IN_SECONDS) +

            static_cast<uint64_t>(tv.tv_sec);

#endif

  return TimeFromElapsedSecondsAD(seconds);

}

Time

TimeFromEpochInSeconds(uint64_t secondsSinceEpoch)

{

  uint64_t seconds = (DaysBeforeYear(1970) * Time::ONE_DAY_IN_SECONDS) +

                     secondsSinceEpoch;

  return TimeFromElapsedSecondsAD(seconds);

}

} } // namespace mozilla::pkix