/**
* @param $version
*
* @return float|int|mixed
*/
public function estimateBitStreamSizeOfEntry($version)
{
if ($version == 0) {
$version = 1;
}
switch ($this->mode) {
case Enum::QR_MODE_NUM:
$bits = Input::estimateBitsModeNum($this->size);
break;
case Enum::QR_MODE_AN:
$bits = Input::estimateBitsModeAn($this->size);
break;
case Enum::QR_MODE_8:
$bits = Input::estimateBitsMode8($this->size);
break;
case Enum::QR_MODE_KANJI:
$bits = Input::estimateBitsModeKanji($this->size);
break;
case Enum::QR_MODE_STRUCTURE:
return Enum::STRUCTURE_HEADER_BITS;
default:
return 0;
}
$l = Specifications::lengthIndicator($this->mode, $version);
$m = 1 << $l;
$num = (int) (($this->size + $m - 1) / $m);
$bits += $num * (4 + $l);
return $bits;
}
/**
* @return int
*/
public function eat8()
{
$la = Specifications::lengthIndicator(Enum::QR_MODE_AN, $this->input->getVersion());
$ln = Specifications::lengthIndicator(Enum::QR_MODE_NUM, $this->input->getVersion());
$p = 1;
$dataStrLen = strlen($this->dataStr);
while ($p < $dataStrLen) {
$mode = $this->identifyMode($p);
if ($mode == Enum::QR_MODE_KANJI) {
break;
}
if ($mode == Enum::QR_MODE_NUM) {
$q = $p;
while (static::isDigitAt($this->dataStr, $q)) {
$q++;
}
$dif = Input::estimateBitsMode8($p) + Input::estimateBitsModeNum($q - $p) + 4 + $ln - Input::estimateBitsMode8($q);
// - 4 - l8
if ($dif < 0) {
break;
} else {
$p = $q;
}
} else {
if ($mode == Enum::QR_MODE_AN) {
$q = $p;
while (static::isAlNumAt($this->dataStr, $q)) {
$q++;
}
$dif = Input::estimateBitsMode8($p) + Input::estimateBitsModeAn($q - $p) + 4 + $la - Input::estimateBitsMode8($q);
// - 4 - l8
if ($dif < 0) {
break;
} else {
$p = $q;
}
} else {
$p++;
}
}
}
$run = $p;
$ret = $this->input->append(Enum::QR_MODE_8, $run, str_split($this->dataStr));
if ($ret < 0) {
return -1;
}
return $run;
}
/**
* @param $mode
* @param $version
* @param $bits
*
* @return int
*/
public static function lengthOfCode($mode, $version, $bits)
{
$payload = $bits - 4 - Specifications::lengthIndicator($mode, $version);
switch ($mode) {
case Enum::QR_MODE_NUM:
$chunks = (int) ($payload / 10);
$remain = $payload - $chunks * 10;
$size = $chunks * 3;
if ($remain >= 7) {
$size += 2;
} else {
if ($remain >= 4) {
$size += 1;
}
}
break;
case Enum::QR_MODE_AN:
$chunks = (int) ($payload / 11);
$remain = $payload - $chunks * 11;
$size = $chunks * 2;
if ($remain >= 6) {
$size++;
}
break;
case Enum::QR_MODE_8:
$size = (int) ($payload / 8);
break;
case Enum::QR_MODE_KANJI:
$size = (int) ($payload / 13 * 2);
break;
case Enum::QR_MODE_STRUCTURE:
$size = (int) ($payload / 8);
break;
default:
$size = 0;
break;
}
$maxsize = Specifications::maximumWords($mode, $version);
if ($size < 0) {
$size = 0;
}
if ($size > $maxsize) {
$size = $maxsize;
}
return $size;
}