/// <summary>
/// https://tc39.es/ecma262/#sec-touint16
/// </summary>
public static ushort ToUint16(JsValue o)
{
if (o._type == InternalTypes.Integer)
{
var integer = o.AsInteger();
if (integer is >= 0 and <= ushort.MaxValue)
{
return((ushort)integer);
}
}
var number = ToNumber(o);
if (double.IsNaN(number) || number == 0 || double.IsInfinity(number))
{
return(0);
}
var intValue = Math.Floor(Math.Abs(number));
if (number < 0)
{
intValue *= -1;
}
var int16Bit = intValue % 65_536; // 2^16
return((ushort)int16Bit);
}
private static JsValue CompareInteger(JsValue x, JsValue y, bool leftFirst)
{
int nx, ny;
if (leftFirst)
{
nx = x.AsInteger();
ny = y.AsInteger();
}
else
{
ny = y.AsInteger();
nx = x.AsInteger();
}
return(nx < ny);
}
/// <summary>
/// https://tc39.es/ecma262/#sec-touint8clamp
/// </summary>
internal static byte ToUint8Clamp(JsValue o)
{
if (o._type == InternalTypes.Integer)
{
var intValue = o.AsInteger();
if (intValue is > -1 and < 256)
{
return((byte)intValue);
}
}
return(ToUint8ClampUnlikely(o));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-touint32
/// </summary>
public static uint ToUint32(JsValue o)
{
if (o._type == InternalTypes.Integer)
{
return((uint)o.AsInteger());
}
var doubleVal = ToNumber(o);
if (doubleVal is >= 0.0 and <= uint.MaxValue)
{
// Double-to-uint cast is correct in this range
return((uint)doubleVal);
}
return((uint)DoubleToInt32Slow(doubleVal));
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.5
/// </summary>
public static int ToInt32(JsValue o)
{
if (o._type == InternalTypes.Integer)
{
return(o.AsInteger());
}
var doubleVal = ToNumber(o);
if (doubleVal >= -(double)int.MinValue && doubleVal <= int.MaxValue)
{
// Double-to-int cast is correct in this range
return((int)doubleVal);
}
return(DoubleToInt32Slow(doubleVal));
}
private static JsValue DivideInteger(JsValue lval, JsValue rval)
{
var lN = lval.AsInteger();
var rN = rval.AsInteger();
if (lN == 0 && rN == 0)
{
return(JsNumber.DoubleNaN);
}
if (rN == 0)
{
return(lN > 0 ? double.PositiveInfinity : double.NegativeInfinity);
}
if (lN % rN == 0)
{
return(lN / rN);
}
return((double)lN / rN);
}
private static int ToIntegerSupportInfinity(JsValue numberVal)
{
return(numberVal._type == InternalTypes.Integer
? numberVal.AsInteger()
: ToIntegerSupportInfinityUnlikely(numberVal));
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.7
/// </summary>
public static ushort ToUint16(JsValue o)
{
return(o._type == InternalTypes.Integer
? (ushort)(uint)o.AsInteger()
: (ushort)(uint)ToNumber(o));
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.5
/// </summary>
public static int ToInt32(JsValue o)
{
return(o._type == InternalTypes.Integer
? o.AsInteger()
: (int)(uint)ToNumber(o));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-touint8
/// </summary>
internal static double ToUint8(JsValue o)
{
return(o._type == InternalTypes.Integer
? (byte)o.AsInteger()
: (byte)(long)ToNumber(o));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-toint16
/// </summary>
internal static double ToInt16(JsValue o)
{
return(o._type == InternalTypes.Integer
? (short)o.AsInteger()
: (short)(long)ToNumber(o));
}
public static bool StrictlyEqual(JsValue x, JsValue y)
{
var typeX = x._type & ~InternalTypes.InternalFlags;
var typeY = y._type & ~InternalTypes.InternalFlags;
if (typeX != typeY)
{
if (typeX == InternalTypes.Integer)
{
typeX = InternalTypes.Number;
}
if (typeY == InternalTypes.Integer)
{
typeY = InternalTypes.Number;
}
if (typeX != typeY)
{
return(false);
}
}
if (typeX == InternalTypes.Undefined || typeX == InternalTypes.Null)
{
return(true);
}
if (typeX == InternalTypes.Integer)
{
return(x.AsInteger() == y.AsInteger());
}
if (typeX == InternalTypes.Number)
{
var nx = ((JsNumber)x)._value;
var ny = ((JsNumber)y)._value;
return(!double.IsNaN(nx) && !double.IsNaN(ny) && nx == ny);
}
if ((typeX & InternalTypes.String) != 0)
{
return(x.ToString() == y.ToString());
}
if (typeX == InternalTypes.Boolean)
{
return(((JsBoolean)x)._value == ((JsBoolean)y)._value);
}
if ((typeX & InternalTypes.Object) != 0 && x.AsObject() is IObjectWrapper xw)
{
var yw = y.AsObject() as IObjectWrapper;
if (yw == null)
{
return(false);
}
return(Equals(xw.Target, yw.Target));
}
return(x == y);
}