public static FriendlyId64?Parse([NotNull] string str)
{
var parts = str.Split('-');
if (parts.Length != 4)
{
return(null);
}
var ab = parts[0];
if (ab.Length != 6)
{
return(null);
}
var cd = parts[1];
if (cd.Length != 6)
{
return(null);
}
var ef = parts[2];
if (ef.Length != 6)
{
return(null);
}
var gh = parts[3];
if (gh.Length != 6)
{
return(null);
}
var abcd = FriendlyId32.Parse($"{ab}-{cd}");
var efgh = FriendlyId32.Parse($"{ef}-{gh}");
if (!abcd.HasValue || !efgh.HasValue)
{
return(null);
}
var value = ((ulong)abcd.Value.Value << 32) | efgh.Value.Value;
unchecked
{
value *= MultiplyInverse;
value -= Offset;
}
return(new FriendlyId64(value));
}
[NotNull] public override string ToString()
{
var number = Value;
unchecked
{
number += Offset;
number *= Multiply;
}
unsafe
{
var ints = new Span <uint>(&number, 2);
var n1 = ints[0];
var n2 = ints[1];
var abcd = new FriendlyId32(n1);
var efgh = new FriendlyId32(n2);
return($"{efgh}-{abcd}");
}
}