<?php
declare(strict_types=1);
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 Spomky-Labs
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
namespace Jose\Component\Core\Util\Ecc;
/**
* @internal
*/
class Math
{
public static function cmp(\GMP $first, \GMP $other): int
{
return \gmp_cmp($first, $other);
}
public static function equals(\GMP $first, \GMP $other): bool
{
return 0 === \gmp_cmp($first, $other);
}
public static function mod(\GMP $number, \GMP $modulus): \GMP
{
return \gmp_mod($number, $modulus);
}
public static function add(\GMP $augend, \GMP $addend): \GMP
{
return \gmp_add($augend, $addend);
}
public static function sub(\GMP $minuend, \GMP $subtrahend): \GMP
{
return \gmp_sub($minuend, $subtrahend);
}
public static function mul(\GMP $multiplier, \GMP $multiplicand): \GMP
{
return \gmp_mul($multiplier, $multiplicand);
}
public static function pow(\GMP $base, int $exponent): \GMP
{
return \gmp_pow($base, $exponent);
}
public static function bitwiseAnd(\GMP $first, \GMP $other): \GMP
{
return \gmp_and($first, $other);
}
public static function bitwiseXor(\GMP $first, \GMP $other): \GMP
{
return \gmp_xor($first, $other);
}
public static function toString(\GMP $value): string
{
return \gmp_strval($value);
}
public static function inverseMod(\GMP $a, \GMP $m): \GMP
{
return \gmp_invert($a, $m);
}
public static function baseConvert(string $number, int $from, int $to): string
{
return \gmp_strval(\gmp_init($number, $from), $to);
}
public static function rightShift(\GMP $number, int $positions): \GMP
{
return \gmp_div($number, \gmp_pow(\gmp_init(2, 10), $positions));
}
public static function stringToInt(string $s): \GMP
{
$result = \gmp_init(0, 10);
$sLen = \mb_strlen($s, '8bit');
for ($c = 0; $c < $sLen; ++$c) {
$result = \gmp_add(\gmp_mul(256, $result), \gmp_init(\ord($s[$c]), 10));
}
return $result;
}
}