diff options
Diffstat (limited to 'src/csharp/Grpc.Core/Internal/Timespec.cs')
| -rw-r--r-- | src/csharp/Grpc.Core/Internal/Timespec.cs | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/csharp/Grpc.Core/Internal/Timespec.cs b/src/csharp/Grpc.Core/Internal/Timespec.cs index 887eae5dd7..0e58e2048d 100644 --- a/src/csharp/Grpc.Core/Internal/Timespec.cs +++ b/src/csharp/Grpc.Core/Internal/Timespec.cs @@ -180,6 +180,14 @@ namespace Grpc.Core.Internal } } + /// <summary> + /// Creates DateTime to Timespec. + /// DateTime has to be in UTC (DateTimeKind.Utc) unless it's DateTime.MaxValue or DateTime.MinValue. + /// For DateTime.MaxValue of date time after the largest representable Timespec, Timespec.InfFuture is returned. + /// For DateTime.MinValue of date time before the lowest representable Timespec, Timespec.InfPast is returned. + /// </summary> + /// <returns>The date time.</returns> + /// <param name="dateTime">Date time.</param> public static Timespec FromDateTime(DateTime dateTime) { if (dateTime == DateTime.MaxValue) @@ -199,11 +207,16 @@ namespace Grpc.Core.Internal TimeSpan timeSpan = dateTime - UnixEpoch; long ticks = timeSpan.Ticks; - IntPtr seconds = new IntPtr(ticks / TicksPerSecond); // possible OverflowException - // (x % m + m) % m is workaround for modulo semantics with negative numbers. - int nanos = (int)(((ticks % TicksPerSecond + TicksPerSecond) % TicksPerSecond) * NanosPerTick); - - return new Timespec(seconds, nanos); + long seconds = ticks / TicksPerSecond; + int nanos = (int)((ticks % TicksPerSecond) * NanosPerTick); + if (nanos < 0) + { + // correct the result based on C# modulo semantics for negative dividend + seconds--; + nanos += (int)NanosPerSecond; + } + // new IntPtr possibly throws OverflowException + return new Timespec(new IntPtr(seconds), nanos); } catch (OverflowException) { |