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authorAnton Luka Šijanec <anton@sijanec.eu>2022-01-11 12:35:47 +0100
committerAnton Luka Šijanec <anton@sijanec.eu>2022-01-11 12:35:47 +0100
commit19985dbb8c0aa66dc4bf7905abc1148de909097d (patch)
tree2cd5a5d20d7e80fc2a51adf60d838d8a2c40999e /vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php
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Diffstat (limited to 'vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php')
-rw-r--r--vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php133
1 files changed, 133 insertions, 0 deletions
diff --git a/vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php b/vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php
new file mode 100644
index 0000000..25ad891
--- /dev/null
+++ b/vendor/fgrosse/phpasn1/lib/Utility/BigIntegerBcmath.php
@@ -0,0 +1,133 @@
+<?php
+/*
+ * This file is part of the PHPASN1 library.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FG\Utility;
+
+/**
+ * Class BigIntegerBcmath
+ * Integer representation of big numbers using the bcmath library to perform large operations.
+ * @package FG\Utility
+ * @internal
+ */
+class BigIntegerBcmath extends BigInteger
+{
+ protected $_str;
+
+ public function __clone()
+ {
+ // nothing needed to copy
+ }
+
+ protected function _fromString($str)
+ {
+ $this->_str = (string)$str;
+ }
+
+ protected function _fromInteger($integer)
+ {
+ $this->_str = (string)$integer;
+ }
+
+ public function __toString()
+ {
+ return $this->_str;
+ }
+
+ public function toInteger()
+ {
+ if ($this->compare(PHP_INT_MAX) > 0 || $this->compare(PHP_INT_MIN) < 0) {
+ throw new \OverflowException(sprintf('Can not represent %s as integer.', $this->_str));
+ }
+ return (int)$this->_str;
+ }
+
+ public function isNegative()
+ {
+ return bccomp($this->_str, '0', 0) < 0;
+ }
+
+ protected function _unwrap($number)
+ {
+ if ($number instanceof self) {
+ return $number->_str;
+ }
+ return $number;
+ }
+
+ public function compare($number)
+ {
+ return bccomp($this->_str, $this->_unwrap($number), 0);
+ }
+
+ public function add($b)
+ {
+ $ret = new self();
+ $ret->_str = bcadd($this->_str, $this->_unwrap($b), 0);
+ return $ret;
+ }
+
+ public function subtract($b)
+ {
+ $ret = new self();
+ $ret->_str = bcsub($this->_str, $this->_unwrap($b), 0);
+ return $ret;
+ }
+
+ public function multiply($b)
+ {
+ $ret = new self();
+ $ret->_str = bcmul($this->_str, $this->_unwrap($b), 0);
+ return $ret;
+ }
+
+ public function modulus($b)
+ {
+ $ret = new self();
+ if ($this->isNegative()) {
+ // bcmod handles negative numbers differently
+ $b = $this->_unwrap($b);
+ $ret->_str = bcsub($b, bcmod(bcsub('0', $this->_str, 0), $b), 0);
+ }
+ else {
+ $ret->_str = bcmod($this->_str, $this->_unwrap($b));
+ }
+ return $ret;
+ }
+
+ public function toPower($b)
+ {
+ $ret = new self();
+ $ret->_str = bcpow($this->_str, $this->_unwrap($b), 0);
+ return $ret;
+ }
+
+ public function shiftRight($bits = 8)
+ {
+ $ret = new self();
+ $ret->_str = bcdiv($this->_str, bcpow('2', $bits));
+ return $ret;
+ }
+
+ public function shiftLeft($bits = 8) {
+ $ret = new self();
+ $ret->_str = bcmul($this->_str, bcpow('2', $bits));
+ return $ret;
+ }
+
+ public function absoluteValue()
+ {
+ $ret = new self();
+ if (-1 === bccomp($this->_str, '0', 0)) {
+ $ret->_str = bcsub('0', $this->_str, 0);
+ }
+ else {
+ $ret->_str = $this->_str;
+ }
+ return $ret;
+ }
+}