UrlDecodeInternal() [2/2]

static string System.Net.WebUtility.UrlDecodeInternal ( string value, Encoding encoding )

inlinestaticprivate

Definition at line 748 of file WebUtility.cs.

    {
        if (string.IsNullOrEmpty(value))
        {
            return value;
        }
        int length = value.Length;
        UrlDecoder urlDecoder = new UrlDecoder(length, encoding);
        bool flag = false;
        bool flag2 = false;
        for (int i = 0; i < length; i++)
        {
            char c = value[i];
            switch (c)
            {
            case '+':
                flag2 = true;
                c = ' ';
                break;
            case '%':
                if (i < length - 2)
                {
                    int num = HexConverter.FromChar(value[i + 1]);
                    int num2 = HexConverter.FromChar(value[i + 2]);
                    if ((num | num2) != 255)
                    {
                        byte b = (byte)((num << 4) | num2);
                        i += 2;
                        urlDecoder.AddByte(b);
                        flag = true;
                        continue;
                    }
                }
                break;
            }
            if ((c & 0xFF80) == 0)
            {
                urlDecoder.AddByte((byte)c);
            }
            else
            {
                urlDecoder.AddChar(c);
            }
        }
        if (!flag)
        {
            if (flag2)
            {
                return value.Replace('+', ' ');
            }
            return value;
        }
        return urlDecoder.GetString();
    }

References System.HexConverter.FromChar(), System.length, and System.value.

Referenced by System.Net.WebUtility.UrlDecode(), and System.Net.WebUtility.UrlDecodeToBytes().