public DateTimeOffset Deserialize(ref JsonReader reader, IJsonFormatterResolver formatterResolver)
{
var str = reader.ReadStringSegmentUnsafe();
var array = str.Array;
var i = str.Offset;
var len = str.Count;
var to = str.Offset + str.Count;
// YYYY
if (len == 4)
{
var y = (array[i++] - (byte)'0') * 1000 + (array[i++] - (byte)'0') * 100 + (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
return(new DateTimeOffset(y, 1, 1, 0, 0, 0, TimeSpan.Zero));
}
// YYYY-MM
if (len == 7)
{
var y = (array[i++] - (byte)'0') * 1000 + (array[i++] - (byte)'0') * 100 + (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'-')
{
goto ERROR;
}
var m = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
return(new DateTimeOffset(y, m, 1, 0, 0, 0, TimeSpan.Zero));
}
// YYYY-MM-DD
if (len == 10)
{
var y = (array[i++] - (byte)'0') * 1000 + (array[i++] - (byte)'0') * 100 + (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'-')
{
goto ERROR;
}
var m = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'-')
{
goto ERROR;
}
var d = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
return(new DateTimeOffset(y, m, d, 0, 0, 0, TimeSpan.Zero));
}
// range-first section requires 19
if (array.Length < 19)
{
goto ERROR;
}
var year = (array[i++] - (byte)'0') * 1000 + (array[i++] - (byte)'0') * 100 + (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'-')
{
goto ERROR;
}
var month = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'-')
{
goto ERROR;
}
var day = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)'T')
{
goto ERROR;
}
var hour = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)':')
{
goto ERROR;
}
var minute = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)':')
{
goto ERROR;
}
var second = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
int ticks = 0;
if (i < to && array[i] == '.')
{
i++;
// *7.
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1000000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 100000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 10000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 100;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 10;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1;
i++;
// others, lack of precision
while (i < to && NumberConverter.IsNumber(array[i]))
{
i++;
}
}
END_TICKS:
if (i < to && array[i] == '-' || array[i] == '+')
{
if (!(i + 5 < to))
{
goto ERROR;
}
var minus = array[i++] == '-';
var h = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
i++;
var m = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
var offset = new TimeSpan(h, m, 0);
if (minus)
{
offset = offset.Negate();
}
return(new DateTimeOffset(year, month, day, hour, minute, second, offset).AddTicks(ticks));
}
return(new DateTimeOffset(year, month, day, hour, minute, second, TimeSpan.Zero).AddTicks(ticks));
ERROR:
throw new InvalidOperationException("invalid datetime format. value:" + StringEncoding.UTF8.GetString(str.Array, str.Offset, str.Count));
}
public TimeSpan Deserialize(ref JsonReader reader, IJsonFormatterResolver formatterResolver)
{
var str = reader.ReadStringSegmentUnsafe();
var array = str.Array;
var i = str.Offset;
var len = str.Count;
var to = str.Offset + str.Count;
// check day exists
bool hasDay = false;
{
bool foundDot = false;
bool foundColon = false;
for (int j = i; j < str.Count; j++)
{
if (array[j] == '.')
{
if (foundColon)
{
break;
}
foundDot = true;
}
else if (array[j] == ':')
{
if (foundDot)
{
hasDay = true;
}
foundColon = true;
}
}
}
// check sign
var minus = false;
if (array[i] == '-')
{
minus = true;
i++;
}
var day = 0;
if (hasDay)
{
var poolArray = JsonSerializer.MemoryPool.Rent();
try
{
for (; array[i] != '.'; i++)
{
poolArray[day++] = array[i];
}
day = new JsonReader(poolArray).ReadInt32();
i++; // skip '.'
}
finally
{
JsonSerializer.MemoryPool.Return(poolArray);
}
}
var hour = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)':')
{
goto ERROR;
}
var minute = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
if (array[i++] != (byte)':')
{
goto ERROR;
}
var second = (array[i++] - (byte)'0') * 10 + (array[i++] - (byte)'0');
int ticks = 0;
if (i < to && array[i] == '.')
{
i++;
// *7.
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1000000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 100000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 10000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1000;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 100;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 10;
i++;
if (!(i < to) || !NumberConverter.IsNumber(array[i]))
{
goto END_TICKS;
}
ticks += (array[i] - (byte)'0') * 1;
i++;
// others, lack of precision
while (i < to && NumberConverter.IsNumber(array[i]))
{
i++;
}
}
END_TICKS:
// be careful to overflow
var ts = new TimeSpan(day, hour, minute, second);
var tk = TimeSpan.FromTicks(ticks);
return((minus)
? ts.Negate().Subtract(tk)
: ts.Add(tk));
ERROR:
throw new InvalidOperationException("invalid datetime format. value:" + StringEncoding.UTF8.GetString(str.Array, str.Offset, str.Count));
}
