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author | Jisi Liu <jisi.liu@gmail.com> | 2015-08-21 11:42:27 -0700 |
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committer | Jisi Liu <jisi.liu@gmail.com> | 2015-08-21 11:44:49 -0700 |
commit | c3bc155aceda36ecb01cde2367a3b427f2d7ce40 (patch) | |
tree | 195d74745dad40a57d49bf718f50c7751336a405 /csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs | |
parent | b0f661181d10bddc08e380992590a1cdd92be92b (diff) | |
parent | eb65c69e14fb711208ad5111cb9672f00864bb6d (diff) | |
download | protobuf-c3bc155aceda36ecb01cde2367a3b427f2d7ce40.tar.gz protobuf-c3bc155aceda36ecb01cde2367a3b427f2d7ce40.tar.bz2 protobuf-c3bc155aceda36ecb01cde2367a3b427f2d7ce40.zip |
Merge branch 'master' of github.com:google/protobuf
Change-Id: If3fb07754a734bae610d95124528e073515ac525
Diffstat (limited to 'csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs')
-rw-r--r-- | csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs b/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs new file mode 100644 index 00000000..18ebefd2 --- /dev/null +++ b/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs @@ -0,0 +1,151 @@ +#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 +{ + // Manually-written partial class for the Duration well-known type, + // providing a conversion to TimeSpan and convenience operators. + public partial class Duration + { + /// <summary> + /// The number of nanoseconds in a second. + /// </summary> + public const int NanosecondsPerSecond = 1000000000; + /// <summary> + /// The number of nanoseconds in a BCL tick (as used by <see cref="TimeSpan"/> and <see cref="DateTime"/>). + /// </summary> + public const int NanosecondsPerTick = 100; + + /// <summary> + /// Converts this <see cref="Duration"/> to a <see cref="TimeSpan"/>. + /// </summary> + /// <remarks>If the duration is not a precise number of ticks, it is truncated towards 0.</remarks> + /// <returns>The value of this duration, as a <c>TimeSpan</c>.</returns> + public TimeSpan ToTimeSpan() + { + checked + { + long ticks = Seconds * TimeSpan.TicksPerSecond + Nanos / NanosecondsPerTick; + return TimeSpan.FromTicks(ticks); + } + } + + /// <summary> + /// Converts the given <see cref="TimeSpan"/> to a <see cref="Duration"/>. + /// </summary> + /// <param name="timeSpan">The <c>TimeSpan</c> to convert.</param> + /// <returns>The value of the given <c>TimeSpan</c>, as a <c>Duration</c>.</returns> + public static Duration FromTimeSpan(TimeSpan timeSpan) + { + checked + { + long ticks = timeSpan.Ticks; + long seconds = ticks / TimeSpan.TicksPerSecond; + int nanos = (int) (ticks % TimeSpan.TicksPerSecond) * NanosecondsPerTick; + return new Duration { Seconds = seconds, Nanos = nanos }; + } + } + + /// <summary> + /// Returns the result of negating the duration. For example, the negation of 5 minutes is -5 minutes. + /// </summary> + /// <param name="value">The duration to negate. Must not be null.</param> + /// <returns>The negated value of this duration.</returns> + public static Duration operator -(Duration value) + { + Preconditions.CheckNotNull(value, "value"); + checked + { + return Normalize(-value.Seconds, -value.Nanos); + } + } + + /// <summary> + /// Adds the two specified <see cref="Duration"/> values together. + /// </summary> + /// <param name="lhs">The first value to add. Must not be null.</param> + /// <param name="rhs">The second value to add. Must not be null.</param> + /// <returns></returns> + public static Duration operator +(Duration lhs, Duration rhs) + { + Preconditions.CheckNotNull(lhs, "lhs"); + Preconditions.CheckNotNull(rhs, "rhs"); + checked + { + return Normalize(lhs.Seconds + rhs.Seconds, lhs.Nanos + rhs.Nanos); + } + } + + /// <summary> + /// Subtracts one <see cref="Duration"/> from another. + /// </summary> + /// <param name="lhs">The duration to subtract from. Must not be null.</param> + /// <param name="rhs">The duration to subtract. Must not be null.</param> + /// <returns>The difference between the two specified durations.</returns> + public static Duration operator -(Duration lhs, Duration rhs) + { + Preconditions.CheckNotNull(lhs, "lhs"); + Preconditions.CheckNotNull(rhs, "rhs"); + checked + { + return Normalize(lhs.Seconds - rhs.Seconds, lhs.Nanos - rhs.Nanos); + } + } + + /// <summary> + /// Creates a duration with the normalized values from the given number of seconds and + /// nanoseconds, conforming with the description in the proto file. + /// </summary> + internal static Duration Normalize(long seconds, int nanoseconds) + { + // Ensure that nanoseconds is in the range (-1,000,000,000, +1,000,000,000) + int extraSeconds = nanoseconds / NanosecondsPerSecond; + seconds += extraSeconds; + nanoseconds -= extraSeconds * NanosecondsPerSecond; + + // Now make sure that Sign(seconds) == Sign(nanoseconds) if Sign(seconds) != 0. + if (seconds < 0 && nanoseconds > 0) + { + seconds += 1; + nanoseconds -= NanosecondsPerSecond; + } + else if (seconds > 0 && nanoseconds < 0) + { + seconds -= 1; + nanoseconds += NanosecondsPerSecond; + } + return new Duration { Seconds = seconds, Nanos = nanoseconds }; + } + } +} |