public override string Format(Object o, IFormatProvider provider)
{
int precision, exponent;
if (this.precision == -1)
{
precision = PrecisionOf(o);
}
else
{
precision = this.precision;
}
#if CONFIG_EXTENDED_NUMERICS
double val = OToDouble(o);
if (val == 0.0)
{
exponent = 0;
}
else
{
//exponent = (int) Math.Floor(Math.Log10(Math.Abs(OToDouble(o))));
exponent = Formatter.GetExponent(val);
}
#else
// Determine the exponent without using floating-point.
if (IsSignedInt(o))
{
long lvalue = OToLong(o);
if (lvalue < 0)
{
lvalue = -lvalue;
}
exponent = 0;
while (lvalue >= 10)
{
++exponent;
lvalue /= 10;
}
}
else if (IsUnsignedInt(o))
{
ulong ulvalue = OToUlong(o);
exponent = 0;
while (ulvalue >= 10)
{
++exponent;
ulvalue /= 10;
}
}
else
{
exponent = 0;
}
#endif
if (IsSignedInt(o) || IsUnsignedInt(o))
{
if (exponent < precision)
{
return(StripTrail(
FixedPointFormatter.Format(o, 0, provider),
provider));
}
else
{
return
(new ScientificFormatter(-1, Ee).Format(o, provider));
}
}
if (exponent >= -4 && exponent < precision)
{
#if CONFIG_EXTENDED_NUMERICS
if (!IsDecimal(o))
{
return(Formatter.FormatDouble(val, exponent, precision, false, provider));
}
#endif
return(StripTrail(
FixedPointFormatter.Format(o, precision, provider),
provider));
}
else
{
#if CONFIG_EXTENDED_NUMERICS
return(Formatter.FormatScientific(val, exponent, precision, this.Gg.ToString(), provider));
#else
return(new ScientificFormatter(precision, Ee).Format(o, provider));
#endif
}
}
public static Formatter CreateFormatter(String format, IFormatProvider p)
{
int precision;
Formatter ret;
if (format == null)
{
throw new FormatException(_("Format_StringException"));
}
// handle empty format
if (format.Length == 0)
{
ret = new GeneralFormatter(-1, 'G');
formats[format] = ret;
return(ret);
}
// Search for cached formats
if (formats[format] != null)
{
return((Formatter)formats[format]);
}
// Validate the format.
// It should be of the form 'X', 'X9', or 'X99'.
// If it's not, return a CustomFormatter.
if (validformats.IndexOf(format[0]) == -1 || format.Length > 3)
{
ret = new CustomFormatter(format);
formats[format] = ret;
return(ret);
}
try
{
precision = (format.Length == 1) ?
-1 : Byte.Parse(format.Substring(1));
}
catch (FormatException)
{
ret = new CustomFormatter(format);
formats[format] = ret;
return(ret);
}
switch (format[0]) // There's always a yucky switch somewhere
{
case 'C':
case 'c':
ret = new CurrencyFormatter(precision);
break;
case 'D':
case 'd':
ret = new DecimalFormatter(precision);
break;
case 'E':
case 'e':
ret = new ScientificFormatter(precision, format[0]);
break;
case 'F':
case 'f':
ret = new FixedPointFormatter(precision);
break;
case 'G':
case 'g':
ret = new GeneralFormatter(precision, format[0]);
break;
case 'N':
case 'n':
ret = new System.Private.NumberFormat.NumberFormatter(precision);
break;
case 'P':
case 'p':
ret = new PercentFormatter(precision);
break;
case 'R':
case 'r':
ret = new RoundTripFormatter(precision);
break;
case 'X':
case 'x':
ret = new HexadecimalFormatter(precision, format[0]);
break;
default:
ret = new CustomFormatter(format);
break;
}
formats[format] = ret;
return(ret);
}
public static Formatter CreateFormatter(String format, IFormatProvider p)
{
int precision;
Formatter ret;
if (format == null)
{
throw new FormatException(_("Format_StringException"));
}
// handle empty format
if(format.Length == 0)
{
//return new CustomFormatter(format);
return new GeneralFormatter(-1, 'G');
}
// Search for cached formats
if (formats[format] != null)
{
return (Formatter) formats[format];
}
// Validate the format.
// It should be of the form 'X', 'X9', or 'X99'.
// If it's not, return a CustomFormatter.
if (validformats.IndexOf(format[0]) == -1 || format.Length > 3)
{
return new CustomFormatter(format);
}
try
{
precision = (format.Length == 1) ?
-1 : Byte.Parse(format.Substring(1));
}
catch (FormatException)
{
return new CustomFormatter(format);
}
switch(format[0]) // There's always a yucky switch somewhere
{
case 'C':
case 'c':
ret = new CurrencyFormatter(precision);
break;
case 'D':
case 'd':
ret = new DecimalFormatter(precision);
break;
case 'E':
case 'e':
ret = new ScientificFormatter(precision, format[0]);
break;
case 'F':
case 'f':
ret = new FixedPointFormatter(precision);
break;
case 'G':
case 'g':
ret = new GeneralFormatter(precision, format[0]);
break;
case 'N':
case 'n':
ret = new System.Private.NumberFormat.NumberFormatter(precision);
break;
case 'P':
case 'p':
ret = new PercentFormatter(precision);
break;
case 'R':
case 'r':
ret = new RoundTripFormatter(precision);
break;
case 'X':
case 'x':
ret = new HexadecimalFormatter(precision, format[0]);
break;
default:
ret = new CustomFormatter(format);
break;
}
formats[format] = ret;
return ret;
}