Method eat8

text-to-qr/lib/phpqrcode/phpqrcode.php:2130–2182

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()

        //----------------------------------------------------------------------
        public function eat8()
        {
            $la = QRspec::lengthIndicator(QR_MODE_AN, $this->input->getVersion());
            $ln = QRspec::lengthIndicator(QR_MODE_NUM, $this->input->getVersion());

            $p = 1;
            $dataStrLen = strlen($this->dataStr);
            
            while($p < $dataStrLen) {
                
                $mode = $this->identifyMode($p);
                if($mode == QR_MODE_KANJI) {
                    break;
                }
                if($mode == QR_MODE_NUM) {
                    $q = $p;
                    while(self::isdigitat($this->dataStr, $q)) {
                        $q++;
                    }
                    $dif = QRinput::estimateBitsMode8($p) // + 4 + l8
                         + QRinput::estimateBitsModeNum($q - $p) + 4 + $ln
                         - QRinput::estimateBitsMode8($q); // - 4 - l8
                    if($dif < 0) {
                        break;
                    } else {
                        $p = $q;
                    }
                } else if($mode == QR_MODE_AN) {
                    $q = $p;
                    while(self::isalnumat($this->dataStr, $q)) {
                        $q++;
                    }
                    $dif = QRinput::estimateBitsMode8($p)  // + 4 + l8
                         + QRinput::estimateBitsModeAn($q - $p) + 4 + $la
                         - QRinput::estimateBitsMode8($q); // - 4 - l8
                    if($dif < 0) {
                        break;
                    } else {
                        $p = $q;
                    }
                } else {
                    $p++;
                }
            }

            $run = $p;
            $ret = $this->input->append(QR_MODE_8, $run, str_split($this->dataStr));
            
            if($ret < 0)
                return -1;

            return $run;
        }

        //----------------------------------------------------------------------
        public function splitString()