geckon01/php-qrcode
1
0
Fork 0
mirror of https://github.com/chillerlan/php-qrcode.git synced 2026-08-28 02:57:57 +00:00
Code Issues Packages Projects Releases Wiki Activity

🚿 simplified

Browse Source
This commit is contained in:
smiley
2022-05-10 13:20:47 +02:00
parent a7e9642a74
commit 10e1162d0e
1 changed files with 8 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Common/ReedSolomonDecoder.php
+8 -9
View File
@@ -12,7 +12,7 @@
namespace chillerlan\QRCode\Common;
use RuntimeException;
use function array_fill, count;
use function array_fill, array_reverse, count;
/**
* Implements Reed-Solomon decoding, as the name implies.
@@ -48,24 +48,23 @@ final class ReedSolomonDecoder{
public function decode(array $received, int $numEccCodewords):array{
$poly = new GenericGFPoly($received);
$syndromeCoefficients = [];
$noError = true;
$error = false;
for($i = 0, $j = $numEccCodewords - 1; $i < $numEccCodewords; $i++, $j--){
$eval = $poly->evaluateAt(GF256::exp($i));
$syndromeCoefficients[$j] = $eval;
for($i = 0; $i < $numEccCodewords; $i++){
$syndromeCoefficients[$i] = $poly->evaluateAt(GF256::exp($i));
if($eval !== 0){
$noError = false;
if($syndromeCoefficients[$i] !== 0){
$error = true;
}
}
if($noError){
if(!$error){
return $received;
}
[$sigma, $omega] = $this->runEuclideanAlgorithm(
GF256::buildMonomial($numEccCodewords, 1),
new GenericGFPoly($syndromeCoefficients),
new GenericGFPoly(array_reverse($syndromeCoefficients)),
$numEccCodewords
);