TryReadCfwsReverse()

static bool System.Net.Mail.WhitespaceReader.TryReadCfwsReverse ( string data, int index, out int outIndex, bool throwExceptionIfFail )

inlinestaticpackage

Definition at line 51 of file WhitespaceReader.cs.

    {
        int num = 0;
        if (!TryReadFwsReverse(data, index, out index, throwExceptionIfFail))
        {
            outIndex = 0;
            return false;
        }
        while (index >= 0)
        {
            if (!QuotedPairReader.TryCountQuotedChars(data, index, permitUnicodeEscaping: true, out var outIndex2, throwExceptionIfFail))
            {
                outIndex = 0;
                return false;
            }
            if (num > 0 && outIndex2 > 0)
            {
                index -= outIndex2;
            }
            else if (data[index] == ')')
            {
                num++;
                index--;
            }
            else if (data[index] == '(')
            {
                num--;
                if (num < 0)
                {
                    if (throwExceptionIfFail)
                    {
                        throw new FormatException(System.SR.Format(System.SR.MailHeaderFieldInvalidCharacter, '('));
                    }
                    outIndex = 0;
                    return false;
                }
                index--;
            }
            else
            {
                if (num <= 0 || (data[index] <= '\u007f' && !MailBnfHelper.Ctext[(uint)data[index]]))
                {
                    if (num <= 0)
                    {
                        break;
                    }
                    if (throwExceptionIfFail)
                    {
                        throw new FormatException(System.SR.Format(System.SR.MailHeaderFieldInvalidCharacter, data[index]));
                    }
                    outIndex = 0;
                    return false;
                }
                index--;
            }
            if (!TryReadFwsReverse(data, index, out index, throwExceptionIfFail))
            {
                outIndex = 0;
                return false;
            }
        }
        if (num > 0)
        {
            if (throwExceptionIfFail)
            {
                throw new FormatException(System.SR.Format(System.SR.MailHeaderFieldInvalidCharacter, ')'));
            }
            outIndex = 0;
            return false;
        }
        outIndex = index;
        return true;
    }

References System.Net.Mime.MailBnfHelper.Ctext, System.SR.Format(), System.index, System.SR.MailHeaderFieldInvalidCharacter, System.Net.Mail.QuotedPairReader.TryCountQuotedChars(), and System.Net.Mail.WhitespaceReader.TryReadFwsReverse().

Referenced by System.Net.Mail.MailAddressParser.TryParseDisplayName(), System.Net.Mail.MailAddressParser.TryParseLocalPart(), and System.Net.Mail.MailAddressParser.TryReadCfwsAndThrowIfIncomplete().