private static NumberFormat Net_G_FormatStringToJavaNumberFormat(string format, IFormatProvider provider, int exp, int maxPrecision)
{
int decimalCount = -1;
bool isEmptyFormat = string.IsNullOrEmpty(format);
if (!isEmptyFormat)
{
decimalCount = FormatHelper.ParseDecimal(format, 1, format.Length);
}
if (decimalCount == -1)
{
decimalCount = maxPrecision;
}
if (exp > -5 && exp < 15)
{
return(NumberFormatFactory.GetDecimalFormat(decimalCount, provider));
}
else
{
bool isUpperCase = isEmptyFormat || format[0] != 'g';
return(NumberFormatFactory.GetScientificFormat(decimalCount, isUpperCase, provider));
}
}
internal static string Format(string format, float value, IFormatProvider provider)
{
NumberFormat f;
bool isDefaultFormat = IsDefaultFormat(format);
//if (isDefaultFormat && provider == CultureInfo.InvariantCulture) // can't use the fast path, see below
// return float.ToString(value);
var dbl = (double)value;
if (isDefaultFormat)
{
#if ANDROID_10P
f = Net_G_FormatStringToJavaNumberFormat(format, provider, GetExponent(value), 7);
#else
f = NetFormatStringToJavaNumberFormat(format, provider, typeof(float));
#endif
}
else if (format.StartsWith("R") || format.StartsWith("r"))
{
#if ANDROID_10P
var exponent = GetExponent(value);
f = Net_G_FormatStringToJavaNumberFormat(format, provider, exponent, 7);
var tmp = f.Format((double)value);
if (f.Parse(tmp).FloatValue() == value)
{
return(tmp);
}
f = Net_G_FormatStringToJavaNumberFormat(format, provider, exponent, 9);
#else
bool isUpperCase = string.IsNullOrEmpty(format) || format[0] != 'g';
f = NumberFormatFactory.GetScientificFormat(7, isUpperCase, provider);
var tmp = f.Format(value);
if (f.Parse(tmp).FloatValue() == value)
{
return(tmp);
}
f = NumberFormatFactory.GetScientificFormat(9, isUpperCase, provider);
#endif
}
else
{
f = NetFormatStringToJavaNumberFormat(format, provider, typeof(float));
}
return(f.Format(dbl));
}
private static NumberFormat NetFormatStringToJavaNumberFormat(string format, IFormatProvider provider, Type type)
{
if (format == null)
{
format = "G";
}
const int notSpecified = -2;
int precision = notSpecified;
if (format.Length > 1)
{
precision = FormatHelper.ParseDecimal(format, 1, format.Length);
}
if (format.Length >= 1)
{
switch (format[0])
{
case 'c':
case 'C':
{
string javaFormat;
NumberFormat nf = NumberFormatFactory.GetCurrencyFormat(provider);
if (precision == notSpecified)
{
javaFormat = "0.00";
}
else
{
if (precision == 0)
{
javaFormat = "0";
}
else if (precision > 0)
{
javaFormat = "0." + new string('0', precision);
}
else
{
javaFormat = format;
}
}
if (nf.IsGroupingUsed)
{
javaFormat = "#,##" + javaFormat;
}
javaFormat = nf.Currency.Symbol + javaFormat;
var f = NumberFormatFactory.GetDecimalFormat(javaFormat, provider);
//DecimalFormat f = (DecimalFormat)NumberFormat.GetNumberInstance(locale);
//f.ApplyPattern(javaFormat);
return(f);
}
case 'd':
case 'D':
{
if (precision == notSpecified)
{
return(NumberFormatFactory.GetDecimalFormat("0", provider));
}
if (precision >= 0)
{
var javaFormat = 0 == precision ? "0" : new string('0', precision);
return(NumberFormatFactory.GetDecimalFormat(javaFormat, provider));
}
}
break;
case 'e':
case 'E':
{
if (precision == notSpecified)
{
return(NumberFormatFactory.GetScientificFormat("0.000000E000", provider));
}
if (precision >= 0)
{
string javaFormat = "0." + new string('0', precision);
if (0 == precision)
{
javaFormat = "0";
}
return(NumberFormatFactory.GetScientificFormat(javaFormat + "E000", provider));
}
}
break;
case 'f':
case 'F':
case 'p':
case 'P':
{
string javaFormat;
if (precision == notSpecified)
{
javaFormat = "0.00";
}
else
{
if (0 == precision)
{
javaFormat = "0";
}
else if (precision > 0)
{
javaFormat = "0." + new string('0', precision);
}
else
{
if (format[0] == 'P')
{
return(NumberFormatFactory.GetFormat(format + " %", provider));
}
else
{
return(NumberFormatFactory.GetFormat(format, provider));
}
}
}
if (format[0] == 'P')
{
return(NumberFormatFactory.GetDecimalFormat(javaFormat + " %", provider));
}
return(NumberFormatFactory.GetDecimalFormat(javaFormat, provider));
}
case 'r':
case 'R':
{
return(NumberFormatFactory.GetDecimalFormat("0.################################", provider));
}
case 'g':
case 'G':
return(NumberFormatFactory.GetFormat(provider));
case 'n':
case 'N':
{
if (precision == notSpecified)
{
return(NumberFormatFactory.GetDecimalFormat("#,##0.00", provider));
}
if (precision >= 0)
{
string javaFormat = "#,##0." + new string('0', precision);
if (0 == precision)
{
javaFormat = "#,##0";
}
return(NumberFormatFactory.GetDecimalFormat(javaFormat, provider));
}
}
break;
case 'x':
case 'X':
if (precision == notSpecified)
{
precision = 8;
}
return(NumberFormatFactory.GetHexFormat(precision, isuppercase: format[0] == 'X'));
}
}
return(NumberFormatFactory.GetFormat(format, provider));
}