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<?php
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Zxing\Qrcode\Decoder;
/**
* <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
* defined by the QR code standard.</p>
*
* @author Sean Owen
*/
class ErrorCorrectionLevel
{
/**
* @var \Zxing\Qrcode\Decoder\ErrorCorrectionLevel[]|null
*/
private static ?array $FOR_BITS = null;
public function __construct(private $bits, private $ordinal = 0)
{
}
public static function Init(): void
{
self::$FOR_BITS = [
new ErrorCorrectionLevel(0x00, 1), //M
new ErrorCorrectionLevel(0x01, 0), //L
new ErrorCorrectionLevel(0x02, 3), //H
new ErrorCorrectionLevel(0x03, 2), //Q
];
}
/** L = ~7% correction */
// self::$L = new ErrorCorrectionLevel(0x01);
/** M = ~15% correction */
//self::$M = new ErrorCorrectionLevel(0x00);
/** Q = ~25% correction */
//self::$Q = new ErrorCorrectionLevel(0x03);
/** H = ~30% correction */
//self::$H = new ErrorCorrectionLevel(0x02);
/**
* @param int $bits containing the two bits encoding a QR Code's error correction level
*
* @return null|self representing the encoded error correction level
*/
public static function forBits(int $bits): self|null
{
if ($bits < 0 || $bits >= (is_countable(self::$FOR_BITS) ? count(self::$FOR_BITS) : 0)) {
throw new \InvalidArgumentException();
}
$level = self::$FOR_BITS[$bits];
// $lev = self::$$bit;
return $level;
}
public function getBits()
{
return $this->bits;
}
public function toString()
{
return $this->bits;
}
public function getOrdinal()
{
return $this->ordinal;
}
}
ErrorCorrectionLevel::Init();
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