public static bool TryParse(
string txt,
QualifiedNumber qn)
{
double d;
if (txt == null)
{
return(false);
}
ParseToTextElements(txt, StaticQnte);
qn.Qualifier = StaticQnte.Qualifier;
if (NumberEx.DoubleTryParseEx(StaticQnte.NumberValue, out d))
{
qn.NumberValue = d;
}
else
{
return(false);
}
// todo: finish parsing stats
return(true);
}
/// <summary>
/// Compare two objects
/// </summary>
/// <param name="dataType"></param>
/// <param name="o1"></param>
/// <param name="o2"></param>
/// <returns></returns>
public static int Compare(
object o1,
object o2)
{
if (o1 == null || o2 == null)
{
throw new ArgumentNullException("Null argument(s)");
}
Type t1 = o1.GetType();
Type t2 = o2.GetType();
IComparable c1 = o1 as IComparable;
if (c1 == null)
{
throw new InvalidDataException("Type doesn't support IComparable: " + t1);
}
IComparable c2 = o2 as IComparable;
if (c2 == null)
{
throw new InvalidDataException("Type doesn't support IComparable: " + t2);
}
if (t1.Equals(t2))
{
return(c1.CompareTo(c2)); // same type?
}
else if (t1.IsAssignableFrom(t2))
{
return(c1.CompareTo(c2)); // t1 subclass of t2
}
else if (t2.IsAssignableFrom(t1))
{
return(-c2.CompareTo(c1)); // t2 subclass of t1 (reverse order)
}
else if (NumberEx.IsNumber(o1) && NumberEx.IsNumber(o2)) // two primitive numbers?
{
double d1 = unchecked ((double)o1); // convert to double ignoring any overflow
double d2 = unchecked ((double)o2);
return(d1.CompareTo(d2));
}
else // see if either arg is a MobiusDataType
{
Type mdt = typeof(MobiusDataType);
if (mdt.IsAssignableFrom(t1))
{
return(c1.CompareTo(c2)); // t1 is MobiusDataType
}
else if (mdt.IsAssignableFrom(t2))
{
return(-c2.CompareTo(c1)); // t2 is MobiusDataType (reverse order)
}
else
{
throw new ArgumentException("Types not comparable: " + t1 + ", " + t2);
}
}
}
/// <summary>
/// Compare two values (IComparable.CompareTo)
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public override int CompareTo(
object o)
{
// First convert o to a double value
double compVal = NullNumber;
if (o == null)
{
compVal = NullNumber;
}
else if (o is int)
{
compVal = (int)o;
}
else if (o is long)
{
compVal = (long)o;
}
else if (o is float)
{
compVal = (float)o;
}
else if (o is double)
{
compVal = (double)o;
}
else if (o is decimal)
{
compVal = decimal.ToDouble((decimal)o);
}
else if (o is double)
{
compVal = (double)o;
}
else if (o is string)
{
if (!NumberEx.DoubleTryParseEx((string)o, out compVal))
{
compVal = NullNumber;
}
}
else if (o is StringMx)
{
StringMx sx = o as StringMx;
if (!NumberEx.DoubleTryParseEx(sx?.Value, out compVal))
{
compVal = NullNumber;
}
}
else if (o is MobiusDataType)
{
compVal = ((MobiusDataType)o).NumericValue;
}
else
{
throw new Exception("Can't compare a " + GetType().Name + " to a " + o.GetType());
}
// Now compare compVal to this NumberMx value
if (this.Value != NullNumber && compVal != NullNumber) // both not null
{
return(this.Value.CompareTo(compVal));
}
else if (this.Value == NullNumber && compVal == NullNumber) // both null
{
return(0); // say equal
}
else if (this.Value != NullNumber) // this not null, compValue is null
{
return(-1); // indicate this is less (put non-null first)
}
else // compValue not null, this is null
{
return(1); // indicate that this is greater (put non-null first)
}
}