voku / swiftmailer

            $size = count($c);

            $need = $this->_charReader->validateByteSequence($c, $size);

            if (

                $need > 0

                &&

                false !== $bytes = $os->read($need)

            ) {

                $len = \strlen($bytes);

                for ($i = 0; $i < $len; ++$i) {

                    $c[] = self::$_byteMap[$bytes[$i]];

                }

            }

            $this->_array[] = $c;

            ++$this->_array_size;

        if (!\feof($fp)) {

            $bytes = \fread($fp, $len);

            if ($bytes !== false) {

                $buf = array();

                $len = \strlen($bytes);

                for ($i = 0; $i < $len; ++$i) {

                    $buf[] = self::$_byteMap[$bytes[$i]];

                }

                return $buf;

            }

        }

        return false;