/// <summary>
/// Converts a wire formatted <see cref="string" /> from <see cref="ToWireFormattedString" /> to a UTC
/// <see cref="DateTimeOffset" />.
/// </summary>
public static DateTimeOffset ToDateTimeOffset(string wireFormattedString)
{
Guard.AgainstNullAndEmpty(nameof(wireFormattedString), wireFormattedString);
if (wireFormattedString.Length != format.Length)
{
throw new FormatException(errorMessage);
}
var year = 0;
var month = 0;
var day = 0;
var hour = 0;
var minute = 0;
var second = 0;
var microSecond = 0;
for (var i = 0; i < format.Length; i++)
{
var digit = wireFormattedString[i];
switch (format[i])
{
case 'y':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
year = (year * 10) + (digit - '0');
break;
case 'M':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
month = (month * 10) + (digit - '0');
break;
case 'd':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
day = (day * 10) + (digit - '0');
break;
case 'H':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
hour = (hour * 10) + (digit - '0');
break;
case 'm':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
minute = (minute * 10) + (digit - '0');
break;
case 's':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
second = (second * 10) + (digit - '0');
break;
case 'f':
if (digit < '0' || digit > '9')
{
throw new FormatException(errorMessage);
}
microSecond = (microSecond * 10) + (digit - '0');
break;
default:
break;
}
}
var timestamp = new DateTimeOffset(year, month, day, hour, minute, second, TimeSpan.Zero);
timestamp = timestamp.AddMicroseconds(microSecond);
return(timestamp);
}
