51      * @param string $src
55     public static function decodeUpper(string $src, bool $strictPadding = false): string  argument
57         return static::doDecode($src, true, $strictPadding);
74      * @param string $src
78     public static function encodeUnpadded(string $src): string  argument
80         return static::doEncode($src, false, false);
86      * @param string $src
90     public static function encodeUpper(string $src): string  argument
92         return static::doEncode($src, true, true);
98      * @param string $src
102     public static function encodeUpperUnpadded(string $src): string  argument
104         return static::doEncode($src, true, false);
111      * @param int $src
114     protected static function decode5Bits(int $src): int  argument
119         $ret += (((0x60 - $src) & ($src - 0x7b)) >> 8) & ($src - 96);
122         $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23);
133      * @param int $src
136     protected static function decode5BitsUpper(int $src): int  argument
141         $ret += (((0x40 - $src) & ($src - 0x5b)) >> 8) & ($src - 64);
144         $ret += (((0x31 - $src) & ($src - 0x38)) >> 8) & ($src - 23);
153      * @param int $src
156     protected static function encode5Bits(int $src): string  argument
161         $diff -= ((25 - $src) >> 8) & 73;
163         return \pack('C', $src + $diff);
172      * @param int $src
175     protected static function encode5BitsUpper(int $src): string  argument
180         $diff -= ((25 - $src) >> 8) & 41;
182         return \pack('C', $src + $diff);
189      * @param string $src
196 …protected static function doDecode(string $src, bool $upper = false, bool $strictPadding = false):…  argument
204         $srcLen = Binary::safeStrlen($src);
211                     if ($src[$srcLen - 1] === '=') {
224             $src = \rtrim($src, '=');
225             $srcLen = Binary::safeStrlen($src);
233             $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 8));
264             $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i));
382      * @param string $src
388     protected static function doEncode(string $src, bool $upper = false, $pad = true): string  argument
396         $srcLen = Binary::safeStrlen($src);
401             $chunk = \unpack('C*', Binary::safeSubstr($src, $i, 5));
420             $chunk = \unpack('C*', Binary::safeSubstr($src, $i, $srcLen - $i));