ParseFormatSpecifier()

static char System.Globalization.FormatProvider.Number.ParseFormatSpecifier ( ReadOnlySpan< char > format, out int digits )

inlinestaticpackage

Definition at line 368 of file FormatProvider.cs.

        {
            char c = '\0';
            if (format.Length > 0)
            {
                c = format[0];
                if ((uint)(c - 65) <= 25u || (uint)(c - 97) <= 25u)
                {
                    if (format.Length == 1)
                    {
                        digits = -1;
                        return c;
                    }
                    if (format.Length == 2)
                    {
                        int num = format[1] - 48;
                        if ((uint)num < 10u)
                        {
                            digits = num;
                            return c;
                        }
                    }
                    else if (format.Length == 3)
                    {
                        int num2 = format[1] - 48;
                        int num3 = format[2] - 48;
                        if ((uint)num2 < 10u && (uint)num3 < 10u)
                        {
                            digits = num2 * 10 + num3;
                            return c;
                        }
                    }
                    int num4 = 0;
                    int num5 = 1;
                    while (num5 < format.Length && (uint)(format[num5] - 48) < 10u)
                    {
                        int num6 = num4 * 10 + format[num5++] - 48;
                        if (num6 < num4)
                        {
                            throw new FormatException(System.SR.Argument_BadFormatSpecifier);
                        }
                        num4 = num6;
                    }
                    if (num5 == format.Length || format[num5] == '\0')
                    {
                        digits = num4;
                        return c;
                    }
                }
            }
            digits = -1;
            if (format.Length != 0 && c != 0)
            {
                return '\0';
            }
            return 'G';
        }

References System.SR.Argument_BadFormatSpecifier, and System.format.

Referenced by System.Globalization.FormatProvider.FormatBigInteger().