public static Atom GetElement(Atom args, Context context)
{
Atom arg0 = (Atom)args?.value;
Atom arg1 = (Atom)args?.next?.value;
if (arg0.type != AtomType.Number ||
UNumber.NumberType(arg0.value) > UNumber.SINT)
{
throw new ArgumentException("First argument must be integer number!");
}
if (arg1.type != AtomType.Pair)
{
throw new ArgumentException("Second argument must be list!");
}
Atom res = arg1.ListSkip((int)arg0.value);
if (res == null)
{
throw new ArgumentException(string.Format("List too short for argument {0}!", arg0.value));
}
return(res);
}
public static Atom ToAtom <T>(T t)
{
Type type = typeof(T);
if (type == typeof(bool))
{
return(new Atom(AtomType.Bool, t));
}
if (type == typeof(string))
{
return(new Atom(AtomType.String, t));
}
if (UNumber.IsNumber(t))
{
return(new Atom(AtomType.Number, t));
}
if (type == typeof(Atom))
{
return(t as Atom);
}
if (type == typeof(List <Atom>))
{
return(ListToAtom(t as List <Atom>));
}
return(new Atom(AtomType.Native, t));
}
public static Atom PredDouble(Atom args, Context context)
{
Atom atom = (Atom)args?.value;
if (atom.type == AtomType.Number &&
UNumber.NumberType(atom.value) == UNumber.DOUBLE)
{
return(Atom.TRUE);
}
return(Atom.FALSE);
}
public static Atom PredSShort(Atom args, Context context)
{
Atom atom = (Atom)args?.value;
if (atom.type == AtomType.Number &&
UNumber.NumberType(atom.value) == UNumber.SSHORT)
{
return(Atom.TRUE);
}
return(Atom.FALSE);
}
public static Atom Rsh(Atom args, Context context)
{
CheckAllNumbers(args);
object res = ((Atom)args?.value).value;
for (Atom iter = args.next; iter != null; iter = iter.next)
{
res = UNumber.Rsh(res, ((Atom)iter.value).value);
}
return(new Atom(AtomType.Number, res));
}
public static Atom Tanh(Atom args, Context context)
{
Atom atom = (Atom)args?.value;
if (atom.type != AtomType.Number)
{
throw new ArgumentException("Argument must be number!");
}
return(new Atom(AtomType.Number, UNumber.Tanh(atom.value)));
}
public static Atom Eq(Atom args, Context context)
{
CheckAllNumbers(args);
for (Atom iter = args; iter != null && iter.next != null; iter = iter.next)
{
if (!(bool)UNumber.Eq(
((Atom)iter.value).value,
((Atom)iter.next?.value).value))
{
return(Atom.FALSE);
}
}
return(Atom.TRUE);
}
private static Atom Write(Atom args, Context context)
{
Atom stream = args?.atom;
if (stream.type != AtomType.Native)
{
throw new ArgumentException("Argument must be stream!");
}
StreamWriter writer = stream?.value as StreamWriter;
if (writer == null)
{
throw new ArgumentException("Argument must be stream!");
}
Atom value = args?.next?.atom;
if (value == null)
{
throw new ArgumentException("Second argument can't be null!");
}
switch (value.type)
{
case AtomType.Number:
var type = UNumber.NumberType(value?.value);
switch (type)
{
case UNumber.UINT_8: writer.Write(Convert.ToByte(value.value)); break;
case UNumber.SINT_8: writer.Write(Convert.ToSByte(value.value)); break;
case UNumber.UINT16: writer.Write(Convert.ToUInt16(value.value)); break;
case UNumber.SINT16: writer.Write(Convert.ToInt16(value.value)); break;
case UNumber._CHAR_: writer.Write(Convert.ToChar(value.value)); break;
case UNumber.UINT32: writer.Write(Convert.ToUInt32(value.value)); break;
case UNumber.SINT32: writer.Write(Convert.ToInt32(value.value)); break;
case UNumber.UINT64: writer.Write(Convert.ToUInt64(value.value)); break;
case UNumber.SINT64: writer.Write(Convert.ToInt64(value.value)); break;
case UNumber.FLO32: writer.Write(Convert.ToSingle(value.value)); break;
case UNumber.FLO64: writer.Write(Convert.ToDouble(value.value)); break;
default:
writer.Write(value?.value);
break;
}
break;
default:
writer.Write(value?.value);
break;
}
return(null);
}
