internal void Append(SymbolAndPower symbolAndPower, SymbolFormat symbolFormat)
{
this.Append(symbolAndPower.Symbol);
if (symbolAndPower.Power == 1)
{
return;
}
switch (symbolFormat)
{
case SymbolFormat.SignedHatPowers:
this.Append('^');
this.Append(symbolAndPower.Power.ToString(CultureInfo.InvariantCulture));
break;
case SymbolFormat.FractionHatPowers:
{
var power = Math.Abs(symbolAndPower.Power);
if (power == 1)
{
return;
}
this.Append('^');
this.Append(power.ToString(CultureInfo.InvariantCulture));
break;
}
case SymbolFormat.SignedSuperScript:
{
if (symbolAndPower.Power == 1)
{
return;
}
if (symbolAndPower.Power < 0)
{
this.Append(SuperScript.Minus);
}
this.Append(SuperScript.GetChar(Math.Abs(symbolAndPower.Power)));
break;
}
case SymbolFormat.Default:
case SymbolFormat.FractionSuperScript:
{
var power = Math.Abs(symbolAndPower.Power);
if (power == 1)
{
return;
}
this.Append(SuperScript.GetChar(Math.Abs(symbolAndPower.Power)));
break;
}
default:
throw new ArgumentOutOfRangeException(nameof(symbolFormat), symbolFormat, null);
}
}
public override string ToString()
{
string p;
if (this.Power == 1)
{
p = string.Empty;
}
else if (this.Power > 1)
{
p = new string(SuperScript.GetChar(this.Power), 1);
}
else
{
p = new string(new[] { '⁻', SuperScript.GetChar(-1 * this.Power) });
}
return($"{this.Symbol}{p}");
}
private static bool TryReadSuperScriptInt(string text, ref int pos, out int result)
{
result = SuperScript.GetDigit(text[pos]);
if (result < 0)
{
result = 0;
return(false);
}
pos++;
while (pos < text.Length &&
text[pos].IsSuperscriptDigit())
{
result *= 10;
result += SuperScript.GetDigit(text[pos]);
pos++;
}
return(true);
}
