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authorCharles <sircharlesaze@gmail.com>2020-01-09 10:55:03 +0100
committerCharles <sircharlesaze@gmail.com>2020-01-09 13:09:38 +0100
commit04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa (patch)
tree5c691241355c943a3c68ddb06b8cf8c60aa11319 /srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php
parent7e0d85db834d6351ed85d01e5126ac31dc510b86 (diff)
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Diffstat (limited to 'srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php')
-rw-r--r--srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php41
1 files changed, 41 insertions, 0 deletions
diff --git a/srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php b/srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php
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+++ b/srcs/phpmyadmin/vendor/bacon/bacon-qr-code/src/Common/BitUtils.php
@@ -0,0 +1,41 @@
+<?php
+declare(strict_types = 1);
+
+namespace BaconQrCode\Common;
+
+/**
+ * General bit utilities.
+ *
+ * All utility methods are based on 32-bit integers and also work on 64-bit
+ * systems.
+ */
+final class BitUtils
+{
+ private function __construct()
+ {
+ }
+
+ /**
+ * Performs an unsigned right shift.
+ *
+ * This is the same as the unsigned right shift operator ">>>" in other
+ * languages.
+ */
+ public static function unsignedRightShift(int $a, int $b) : int
+ {
+ return (
+ $a >= 0
+ ? $a >> $b
+ : (($a & 0x7fffffff) >> $b) | (0x40000000 >> ($b - 1))
+ );
+ }
+
+ /**
+ * Gets the number of trailing zeros.
+ */
+ public static function numberOfTrailingZeros(int $i) : int
+ {
+ $lastPos = strrpos(str_pad(decbin($i), 32, '0', STR_PAD_LEFT), '1');
+ return $lastPos === false ? 32 : 31 - $lastPos;
+ }
+}