48 lines
2.0 KiB
C#
48 lines
2.0 KiB
C#
// <copyright file="TimeExtensions.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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namespace IntegrationTests.Helpers;
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internal static class TimeExtensions
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{
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private const long NanoSecondsPerTick = 1000000 / TimeSpan.TicksPerMillisecond;
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private const long UnixEpochInTicks = 621355968000000000; // = DateTimeOffset.FromUnixTimeMilliseconds(0).Ticks
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/// <summary>
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/// Returns the number of nanoseconds that have elapsed since 1970-01-01T00:00:00.000Z.
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/// </summary>
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/// <param name="dateTimeOffset">The value to get the number of elapsed nanoseconds for.</param>
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/// <returns>The number of nanoseconds that have elapsed since 1970-01-01T00:00:00.000Z.</returns>
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public static long ToUnixTimeNanoseconds(this DateTimeOffset dateTimeOffset)
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{
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return (dateTimeOffset.Ticks - UnixEpochInTicks) * NanoSecondsPerTick;
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}
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/// <summary>
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/// Reconverts a long timestamp from TimeExtensions.ToUnixTimeMicroseconds.
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/// </summary>
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/// <param name="ts">The unix time in microseconds.</param>
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/// <returns>The corresponding DateTimeOffset.</returns>
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public static DateTimeOffset UnixMicrosecondsToDateTimeOffset(this long ts)
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{
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const long microsecondsPerMillisecond = 1000;
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const long ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / microsecondsPerMillisecond;
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var ticks = (ts * ticksPerMicrosecond) + UnixEpochInTicks;
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return new DateTimeOffset(ticks, TimeSpan.Zero);
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}
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}
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