public ulong AsUInt64()
{
ICBORNumber cn = NumberInterfaces[this.ItemType];
if (cn == null) {
throw new InvalidOperationException("Not a number type");
}
// TODO: When this library uses PeterO.Numbers later than 0.2, use an
// operator
EInteger bigint = cn.AsEInteger(this.ThisItem);
if (bigint.Sign < 0 || bigint.GetSignedBitLength() > 64) {
throw new OverflowException("This object's value is out of range");
}
byte[] data = bigint.ToBytes(true);
var a = 0;
var b = 0;
for (var i = 0; i < Math.Min(4, data.Length); ++i) {
a |= (((int)data[i]) & 0xff) << (i * 8);
}
for (int i = 4; i < Math.Min(8, data.Length); ++i) {
b |= (((int)data[i]) & 0xff) << ((i - 4) * 8);
}
unchecked
{
var ret = (ulong)a;
ret &= 0xffffffffL;
var retb = (ulong)b;
retb &= 0xffffffffL;
ret |= retb << 32;
return ret;
}
}
private static object TypeToIntegerObject(CBORObject objThis, Type t)
{
if (t.Equals(typeof(int)))
{
return(objThis.AsInt32());
}
if (t.Equals(typeof(short)))
{
return(objThis.AsInt16());
}
if (t.Equals(typeof(ushort)))
{
return(objThis.AsUInt16());
}
if (t.Equals(typeof(byte)))
{
return(objThis.AsByte());
}
if (t.Equals(typeof(sbyte)))
{
return(objThis.AsSByte());
}
if (t.Equals(typeof(long)))
{
return(objThis.AsInt64());
}
if (t.Equals(typeof(uint)))
{
return(objThis.AsUInt32());
}
if (t.Equals(typeof(ulong)))
{
return(objThis.AsUInt64());
}
throw new CBORException("Type not supported");
}