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Unified Diff: third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/TimestampPartial.cs

Issue 1842653006: Update //third_party/protobuf to version 3. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: merge Created 4 years, 8 months ago
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Index: third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/TimestampPartial.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/TimestampPartial.cs b/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/TimestampPartial.cs
new file mode 100644
index 0000000000000000000000000000000000000000..d284acd63f67283775676c9a6ab62c001d9452fa
--- /dev/null
+++ b/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/TimestampPartial.cs
@@ -0,0 +1,169 @@
+#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
+// Copyright 2015 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System;
+
+namespace Google.Protobuf.WellKnownTypes
+{
+ public partial class Timestamp
+ {
+ private static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
+ private static readonly long BclSecondsAtUnixEpoch = UnixEpoch.Ticks / TimeSpan.TicksPerSecond;
+ internal static readonly long UnixSecondsAtBclMinValue = -BclSecondsAtUnixEpoch;
+ internal static readonly long UnixSecondsAtBclMaxValue = (DateTime.MaxValue.Ticks / TimeSpan.TicksPerSecond) - BclSecondsAtUnixEpoch;
+
+ /// <summary>
+ /// Returns the difference between one <see cref="Timestamp"/> and another, as a <see cref="Duration"/>.
+ /// </summary>
+ /// <param name="lhs">The timestamp to subtract from. Must not be null.</param>
+ /// <param name="rhs">The timestamp to subtract. Must not be null.</param>
+ /// <returns>The difference between the two specified timestamps.</returns>
+ public static Duration operator -(Timestamp lhs, Timestamp rhs)
+ {
+ Preconditions.CheckNotNull(lhs, "lhs");
+ Preconditions.CheckNotNull(rhs, "rhs");
+ checked
+ {
+ return Duration.Normalize(lhs.Seconds - rhs.Seconds, lhs.Nanos - rhs.Nanos);
+ }
+ }
+
+ /// <summary>
+ /// Adds a <see cref="Duration"/> to a <see cref="Timestamp"/>, to obtain another <c>Timestamp</c>.
+ /// </summary>
+ /// <param name="lhs">The timestamp to add the duration to. Must not be null.</param>
+ /// <param name="rhs">The duration to add. Must not be null.</param>
+ /// <returns>The result of adding the duration to the timestamp.</returns>
+ public static Timestamp operator +(Timestamp lhs, Duration rhs)
+ {
+ Preconditions.CheckNotNull(lhs, "lhs");
+ Preconditions.CheckNotNull(rhs, "rhs");
+ checked
+ {
+ return Normalize(lhs.Seconds + rhs.Seconds, lhs.Nanos + rhs.Nanos);
+ }
+ }
+
+ /// <summary>
+ /// Subtracts a <see cref="Duration"/> from a <see cref="Timestamp"/>, to obtain another <c>Timestamp</c>.
+ /// </summary>
+ /// <param name="lhs">The timestamp to subtract the duration from. Must not be null.</param>
+ /// <param name="rhs">The duration to subtract.</param>
+ /// <returns>The result of subtracting the duration from the timestamp.</returns>
+ public static Timestamp operator -(Timestamp lhs, Duration rhs)
+ {
+ Preconditions.CheckNotNull(lhs, "lhs");
+ Preconditions.CheckNotNull(rhs, "rhs");
+ checked
+ {
+ return Normalize(lhs.Seconds - rhs.Seconds, lhs.Nanos - rhs.Nanos);
+ }
+ }
+
+ /// <summary>
+ /// Converts this timestamp into a <see cref="DateTime"/>.
+ /// </summary>
+ /// <remarks>
+ /// The resulting <c>DateTime</c> will always have a <c>Kind</c> of <c>Utc</c>.
+ /// If the timestamp is not a precise number of ticks, it will be truncated towards the start
+ /// of time. For example, a timestamp with a <see cref="Nanos"/> value of 99 will result in a
+ /// <see cref="DateTime"/> value precisely on a second.
+ /// </remarks>
+ /// <returns>This timestamp as a <c>DateTime</c>.</returns>
+ public DateTime ToDateTime()
+ {
+ return UnixEpoch.AddSeconds(Seconds).AddTicks(Nanos / Duration.NanosecondsPerTick);
+ }
+
+ /// <summary>
+ /// Converts this timestamp into a <see cref="DateTimeOffset"/>.
+ /// </summary>
+ /// <remarks>
+ /// The resulting <c>DateTimeOffset</c> will always have an <c>Offset</c> of zero.
+ /// If the timestamp is not a precise number of ticks, it will be truncated towards the start
+ /// of time. For example, a timestamp with a <see cref="Nanos"/> value of 99 will result in a
+ /// <see cref="DateTimeOffset"/> value precisely on a second.
+ /// </remarks>
+ /// <returns>This timestamp as a <c>DateTimeOffset</c>.</returns>
+ public DateTimeOffset ToDateTimeOffset()
+ {
+ return new DateTimeOffset(ToDateTime(), TimeSpan.Zero);
+ }
+
+ /// <summary>
+ /// Converts the specified <see cref="DateTime"/> to a <see cref="Timestamp"/>.
+ /// </summary>
+ /// <param name="dateTime"></param>
+ /// <exception cref="ArgumentException">The <c>Kind</c> of <paramref name="dateTime"/> is not <c>DateTimeKind.Utc</c>.</exception>
+ /// <returns>The converted timestamp.</returns>
+ public static Timestamp FromDateTime(DateTime dateTime)
+ {
+ if (dateTime.Kind != DateTimeKind.Utc)
+ {
+ throw new ArgumentException("Conversion from DateTime to Timestamp requires the DateTime kind to be Utc", "dateTime");
+ }
+ // Do the arithmetic using DateTime.Ticks, which is always non-negative, making things simpler.
+ long secondsSinceBclEpoch = dateTime.Ticks / TimeSpan.TicksPerSecond;
+ int nanoseconds = (int) (dateTime.Ticks % TimeSpan.TicksPerSecond) * Duration.NanosecondsPerTick;
+ return new Timestamp { Seconds = secondsSinceBclEpoch - BclSecondsAtUnixEpoch, Nanos = nanoseconds };
+ }
+
+ /// <summary>
+ /// Converts the given <see cref="DateTimeOffset"/> to a <see cref="Timestamp"/>
+ /// </summary>
+ /// <remarks>The offset is taken into consideration when converting the value (so the same instant in time
+ /// is represented) but is not a separate part of the resulting value. In other words, there is no
+ /// roundtrip operation to retrieve the original <c>DateTimeOffset</c>.</remarks>
+ /// <param name="dateTimeOffset">The date and time (with UTC offset) to convert to a timestamp.</param>
+ /// <returns>The converted timestamp.</returns>
+ public static Timestamp FromDateTimeOffset(DateTimeOffset dateTimeOffset)
+ {
+ // We don't need to worry about this having negative ticks: DateTimeOffset is constrained to handle
+ // values whose *UTC* value is in the range of DateTime.
+ return FromDateTime(dateTimeOffset.UtcDateTime);
+ }
+
+ internal static Timestamp Normalize(long seconds, int nanoseconds)
+ {
+ int extraSeconds = nanoseconds / Duration.NanosecondsPerSecond;
+ seconds += extraSeconds;
+ nanoseconds -= extraSeconds * Duration.NanosecondsPerSecond;
+
+ if (nanoseconds < 0)
+ {
+ nanoseconds += Duration.NanosecondsPerSecond;
+ seconds--;
+ }
+ return new Timestamp { Seconds = seconds, Nanos = nanoseconds };
+ }
+ }
+}

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