40      * @param int $src
43     protected static function decode5Bits(int $src): int  argument
48         $ret += (((0x2f - $src) & ($src - 0x3a)) >> 8) & ($src - 47);
51         $ret += (((0x60 - $src) & ($src - 0x77)) >> 8) & ($src - 86);
60      * @param int $src
63     protected static function decode5BitsUpper(int $src): int  argument
68         $ret += (((0x2f - $src) & ($src - 0x3a)) >> 8) & ($src - 47);
71         $ret += (((0x40 - $src) & ($src - 0x57)) >> 8) & ($src - 54);
80      * @param int $src
83     protected static function encode5Bits(int $src): string  argument
85         $src += 0x30;
88         $src += ((0x39 - $src) >> 8) & 39;
90         return \pack('C', $src);
99      * @param int $src
102     protected static function encode5BitsUpper(int $src): string  argument
104         $src += 0x30;
107         $src += ((0x39 - $src) >> 8) & 7;
109         return \pack('C', $src);