// Copyright © 2022 The CefSharp Authors. All rights reserved.
|
//
|
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
|
|
using System;
|
|
namespace CefSharp.Internals
|
{
|
/// <inheritdoc/>
|
public sealed class BaseTimeConverter : IBaseTimeConverter
|
{
|
private static DateTime UtcWindowsEpoch = DateTime.SpecifyKind(DateTime.Parse("1601-01-01"), DateTimeKind.Utc);
|
|
/// <inheritdoc/>
|
DateTime IBaseTimeConverter.FromBaseTimeToDateTime(long val)
|
{
|
//DateTime.MaxTicks - DateTime.FileTimeOffset
|
const long MaxFileTime = 2650467743999999999;
|
//DateTime.FileTimeOffset
|
const long FileTimeOffset = 504911232000000000;
|
|
var fileTime = val * 10;
|
|
if (fileTime > MaxFileTime)
|
{
|
return DateTime.MaxValue;
|
}
|
|
if (fileTime < 0)
|
{
|
var universalTicks = fileTime + FileTimeOffset;
|
|
if(universalTicks <= 0)
|
{
|
return DateTime.MinValue.ToLocalTime();
|
}
|
|
return new DateTime(universalTicks, DateTimeKind.Utc).ToLocalTime();
|
}
|
|
return DateTime.FromFileTime(fileTime);
|
}
|
|
/// <inheritdoc/>
|
long IBaseTimeConverter.FromDateTimeToBaseTime(DateTime dateTime)
|
{
|
//DateTime.FileTimeOffset
|
const long FileTimeOffset = 504911232000000000;
|
|
var utcDateTime = dateTime.ToUniversalTime();
|
|
// FileTime doesn't support less than Epoch
|
if(utcDateTime < UtcWindowsEpoch)
|
{
|
var ticks = utcDateTime.Ticks - FileTimeOffset;
|
|
return ticks / 10;
|
}
|
|
// Same as calling ToFileTime, this to me is a little
|
// more self descriptive of what's going on.
|
return utcDateTime.ToFileTimeUtc() / 10;
|
}
|
}
|
}
|
