public static bool JScriptStrictEquals(object v1, object v2)
{
IConvertible ic1 = v1 as IConvertible;
IConvertible ic2 = v2 as IConvertible;
TypeCode tc1 = Convert.GetTypeCode(v1, ic1);
TypeCode tc2 = Convert.GetTypeCode(v2, ic2);
bool both_numbers = Convert.IsNumberTypeCode(tc1) && Convert.IsNumberTypeCode(tc2);
if (tc1 != tc2 && !both_numbers)
{
return(false);
}
switch (tc1)
{
case TypeCode.DBNull:
case TypeCode.Empty:
return(true);
case TypeCode.Boolean:
return(ic1.ToBoolean(null) == ic2.ToBoolean(null));
case TypeCode.String:
return(ic1.ToString(null) == ic2.ToString(null));
case TypeCode.Object:
if (v1 is ScriptFunction && v2 is ScriptFunction)
{
return(v1 == v2 || v1.Equals(v2));
}
else
{
return(v1 == v2);
}
default:
if (both_numbers)
{
double num1;
if (Convert.IsFloatTypeCode(tc1))
{
num1 = ic1.ToDouble(null);
}
else
{
num1 = (double)ic1.ToInt64(null);
}
double num2;
if (Convert.IsFloatTypeCode(tc2))
{
num2 = ic2.ToDouble(null);
}
else
{
num2 = (double)ic2.ToInt64(null);
}
return(num1 == num2);
}
Console.WriteLine("StrictEquality, tc1 = {0}, tc2 = {1}", tc1, tc2);
break;
}
throw new NotImplementedException();
}
public bool EvaluateEquality(object v1, object v2)
{
IConvertible ic1 = v1 as IConvertible;
IConvertible ic2 = v2 as IConvertible;
TypeCode tc1 = Convert.GetTypeCode(v1, ic1);
TypeCode tc2 = Convert.GetTypeCode(v2, ic2);
bool both_numbers = Convert.IsNumberTypeCode(tc1) && Convert.IsNumberTypeCode(tc2);
if ((tc1 == tc2) || both_numbers)
{
switch (tc1)
{
case TypeCode.DBNull:
case TypeCode.Empty:
return(true);
case TypeCode.Boolean:
return(ic1.ToBoolean(null) == ic2.ToBoolean(null));
case TypeCode.String:
return(ic1.ToString(null) == ic2.ToString(null));
case TypeCode.Object:
if (v1 is ScriptFunction && v2 is ScriptFunction)
{
return(v1 == v2 || v1.Equals(v2));
}
else
{
return(v1 == v2);
}
default:
if (both_numbers)
{
double num1;
if (Convert.IsFloatTypeCode(tc1))
{
num1 = ic1.ToDouble(null);
}
else
{
num1 = (double)ic1.ToInt64(null);
}
double num2;
if (Convert.IsFloatTypeCode(tc2))
{
num2 = ic2.ToDouble(null);
}
else
{
num2 = (double)ic2.ToInt64(null);
}
return(num1 == num2);
}
else
{
return(false);
}
}
}
else
{
bool swapped = false;
redo:
switch (tc1)
{
case TypeCode.DBNull:
if (tc2 == TypeCode.Empty)
{
return(true);
}
break;
case TypeCode.String:
if (Convert.IsNumberTypeCode(tc2))
{
return(EvaluateEquality(Convert.ToNumber(v1), v2));
}
break;
case TypeCode.Boolean:
return(EvaluateEquality(Convert.ToNumber(v1), v2));
case TypeCode.Object:
if (tc2 == TypeCode.String || Convert.IsNumberTypeCode(tc2))
{
return(EvaluateEquality(Convert.ToPrimitive(v1, null), v2));
}
break;
}
if (!swapped)
{
swapped = true;
object vt = v1;
v1 = v2;
v2 = vt;
ic1 = v1 as IConvertible;
ic2 = v2 as IConvertible;
tc1 = Convert.GetTypeCode(v1, ic1);
tc2 = Convert.GetTypeCode(v2, ic2);
goto redo;
}
else
{
return(false);
}
}
}
