void IFormatter <DateTime> .Write(DateTime value, MsgPackStream stream, IContext context)
{
var secondsSinceBclEpoch = value.Ticks / TimeSpan.TicksPerSecond;
var seconds = secondsSinceBclEpoch - BclSecondsAtUnixEpoch;
var nanoseconds = (value.Ticks % TimeSpan.TicksPerSecond) * NanosecondsPerTick;
// Reference:
// struct timespec {
// long tv_sec; // seconds
// long tv_nsec; // nanoseconds
// } time;
// if ((time.tv_sec >> 34) == 0) {
// uint64_t data64 = (time.tv_nsec << 34) | time.tv_sec;
// if (data64 & 0xffffffff00000000L == 0) {
// // timestamp 32
// uint32_t data32 = data64;
// serialize(0xd6, -1, data32)
// }
// else {
// // timestamp 64
// serialize(0xd7, -1, data64)
// }
// }
// else {
// // timestamp 96
// serialize(0xc7, 12, -1, time.tv_nsec, time.tv_sec)
// }
unchecked
{
if (seconds >> 34 == 0)
{
var data64 = (ulong)((nanoseconds << 34) | seconds);
if ((data64 & 0xffffffff00000000ul) == 0ul)
{
var data32 = (uint)data64;
StreamWriter.WriteExtensionHeader(new ExtensionHeader(TypeCode, 4u), stream);
stream.WriteUInt32(data32);
}
else
{
StreamWriter.WriteExtensionHeader(new ExtensionHeader(TypeCode, 8u), stream);
stream.WriteUInt64(data64);
}
}
else
{
StreamWriter.WriteExtensionHeader(new ExtensionHeader(TypeCode, 12u), stream);
stream.WriteUInt32((uint)nanoseconds);
stream.WriteInt64(seconds);
}
}
}
public void TestSignedMinMax()
{
var stream = new MsgPackStream();
stream.WriteInt8(sbyte.MinValue);
stream.WriteInt8(sbyte.MaxValue);
stream.WriteInt16(short.MinValue);
stream.WriteInt16(short.MaxValue);
stream.WriteInt32(int.MinValue);
stream.WriteInt32(int.MaxValue);
stream.WriteInt64(long.MinValue);
stream.WriteInt64(long.MaxValue);
stream.Position = 0;
Assert.AreEqual(sbyte.MinValue, stream.ReadInt8());
Assert.AreEqual(sbyte.MaxValue, stream.ReadInt8());
Assert.AreEqual(short.MinValue, stream.ReadInt16());
Assert.AreEqual(short.MaxValue, stream.ReadInt16());
Assert.AreEqual(int.MinValue, stream.ReadInt32());
Assert.AreEqual(int.MaxValue, stream.ReadInt32());
Assert.AreEqual(long.MinValue, stream.ReadInt64());
Assert.AreEqual(long.MaxValue, stream.ReadInt64());
}
public void TestSigned()
{
var stream = new MsgPackStream();
stream.WriteInt8(-11);
Assert.AreEqual(stream.Position, 1);
stream.WriteInt16(192);
Assert.AreEqual(stream.Position, 3);
stream.WriteInt32(-213);
Assert.AreEqual(stream.Position, 7);
stream.WriteInt64(64);
Assert.AreEqual(stream.Position, 15);
stream.Position = 0;
Assert.AreEqual(-11, stream.ReadInt8());
Assert.AreEqual(192, stream.ReadInt16());
Assert.AreEqual(-213, stream.ReadInt32());
Assert.AreEqual(64, stream.ReadInt64());
}