84 lines
2.6 KiB
C#
84 lines
2.6 KiB
C#
#region copyright
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//------------------------------------------------------------------------------
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// 此代码版权声明为全文件覆盖，如有原作者特别声明，会在下方手动补充
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// 此代码版权（除特别声明外的代码）归作者本人Diego所有
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// 源代码使用协议遵循本仓库的开源协议及附加协议
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// Gitee源代码仓库：https://gitee.com/diego2098/ThingsGateway
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// Github源代码仓库：https://github.com/kimdiego2098/ThingsGateway
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// 使用文档：https://diego2098.gitee.io/thingsgateway-docs/
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// QQ群：605534569
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//------------------------------------------------------------------------------
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#endregion
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namespace ThingsGateway.Foundation.Adapter.OPCDA.Comn;
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internal static class Convert
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{
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/// <summary>
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/// windows的filetime是从1601-1-1 00:00:00开始的，datetime是从1-1-1 00:00:00开始的
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/// datetime和filetime的滴答单位都是100ns（100纳秒，千万分之一秒），所以转换时只需要考虑开始时间即可
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/// </summary>
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private static readonly DateTime FILETIME_BaseTime = new DateTime(1601, 1, 1);
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private static bool m_preserveUTC = false;
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internal static object Clone(object source)
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{
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if (source == null)
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{
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return null;
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}
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if (source.GetType().IsValueType)
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{
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return source;
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}
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if (source.GetType().IsArray || source.GetType() == typeof(Array))
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{
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Array array = (Array)((Array)source).Clone();
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for (int i = 0; i < array.Length; i++)
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{
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array.SetValue(Clone(array.GetValue(i)), i);
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}
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return array;
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}
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try
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{
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return ((ICloneable)source).Clone();
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}
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catch
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{
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throw new NotSupportedException("Object cannot be cloned.");
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}
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}
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internal static DateTime FileTimeToDateTime(System.Runtime.InteropServices.ComTypes.FILETIME filetime)
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{
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long num = filetime.dwHighDateTime;
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if (num < 0)
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{
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num += 4294967296L;
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}
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long num2 = num << 32;
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num = filetime.dwLowDateTime;
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if (num < 0)
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{
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num += 4294967296L;
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}
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num2 += num;
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if (num2 == 0)
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{
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return DateTime.MinValue;
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}
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if (m_preserveUTC)
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{
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DateTime fILETIME_BaseTime = FILETIME_BaseTime;
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return fILETIME_BaseTime.Add(new TimeSpan(num2));
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}
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DateTime fILETIME_BaseTime2 = FILETIME_BaseTime;
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return fILETIME_BaseTime2.Add(new TimeSpan(num2)).ToLocalTime();
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}
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}
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