// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// 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.

#ifndef STARBOARD_SHARED_POSIX_TIME_INTERNAL_H_
#define STARBOARD_SHARED_POSIX_TIME_INTERNAL_H_

#if SB_API_VERSION < 16

#include <sys/time.h>
#include <time.h>

#include "starboard/shared/internal_only.h"
#include "starboard/time.h"

namespace {  // NOLINT(build/namespaces_headers)
const int64_t kMillisecondsPerSecond = kSbTimeSecond / kSbTimeMillisecond;
const int64_t kNanosecondsPerMicrosecond = 1000;

inline SbTime FromSeconds(int64_t secs) {
  return secs * kSbTimeSecond;
}

inline SbTime FromNanoseconds(int64_t ns) {
  return ns / kNanosecondsPerMicrosecond;
}

// Converts a timespec representing a duration into microseconds.
inline int64_t FromTimespecDelta(struct timespec* time) {
  return FromSeconds(static_cast<int64_t>(time->tv_sec)) +
         FromNanoseconds(static_cast<int64_t>(time->tv_nsec));
}

// Converts a timeval (relative to POSIX epoch) into microseconds since the
// Windows epoch (1601).
inline int64_t FromTimeval(const struct timeval* time) {
  return SbTimeFromPosix(FromSeconds(static_cast<int64_t>(time->tv_sec)) +
                         time->tv_usec);
}

// Converts a time_t (relative to POSIX epoch) into microseconds since the
// Windows epoch (1601).
inline int64_t FromTimeT(time_t time) {
  return SbTimeFromPosix(FromSeconds(time));
}
}  // namespace

#endif  // SB_API_VERSION < 16

#endif  // STARBOARD_SHARED_POSIX_TIME_INTERNAL_H_