<?php
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<?php
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class VersatileCounter {
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class VersatileCounter {
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static $masks = array(
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static $masks = array(
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2 => 0x3,
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2 => 0x3,
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3 => 0x6,
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3 => 0x6,
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4 => 0xC,
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4 => 0xC,
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5 => 0x14,
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5 => 0x14,
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6 => 0x30,
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6 => 0x30,
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7 => 0x60,
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7 => 0x60,
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8 => 0xB8,
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8 => 0xB8,
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9 => 0x110,
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9 => 0x110,
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10 => 0x240,
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10 => 0x240,
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11 => 0x500,
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11 => 0x500,
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12 => 0x829,
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12 => 0x829,
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13 => 0x100C,
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13 => 0x100C,
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14 => 0x2015,
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14 => 0x2015,
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15 => 0x6000,
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15 => 0x6000,
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16 => 0xD008,
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16 => 0xD008,
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17 => 0x12000,
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17 => 0x12000,
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18 => 0x20400,
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18 => 0x20400,
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19 => 0x40023,
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19 => 0x40023,
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20 => 0x82000,
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20 => 0x90000,
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21 => 0x140000,
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21 => 0x140000,
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22 => 0x300000,
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22 => 0x300000,
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23 => 0x420000,
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23 => 0x420000,
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24 => 0xE10000,
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24 => 0xE10000,
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25 => 0x1200000,
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25 => 0x1200000,
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26 => 0x2000023,
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26 => 0x2000023,
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27 => 0x4000013,
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27 => 0x4000013,
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28 => 0xC800000,
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28 => 0xC800000,
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29 => 0x14000000,
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29 => 0x14000000,
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30 => 0x20000029,
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30 => 0x20000029,
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31 => 0x48000000,
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31 => 0x48000000,
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32 => 0x80200003
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32 => 0x80200003
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);
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);
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private $length, $mask;
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private $length, $mask;
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private $state = 0;
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private $state = 0;
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function __construct($length = 8) {
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function __construct($length = 8) {
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$this->length = $length;
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$this->length = $length;
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$this->mask = self::$masks[$length];
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$this->mask = self::$masks[$length];
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}
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}
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function state() {
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function state() {
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return sprintf("%0" . $this->length . "b",$this->state);
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return sprintf("%0" . $this->length . "b",$this->state);
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}
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}
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function tick() {
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function tick() {
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$ns = ($this->state * 2) & (pow(2,$this->length) - 1);
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$ns = ($this->state * 2) & (pow(2,$this->length) - 1);
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$new = $this->state & pow(2,$this->length - 1);
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$new = $this->state & pow(2,$this->length - 1);
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for($i = $this->length - 2;$i >= 0;$i--) {
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for($i = $this->length - 2;$i >= 0;$i--) {
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if($this->mask & pow(2,$i)) {
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if($this->mask & pow(2,$i)) {
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$new = (int) ($new xor ($this->state & pow(2,$i)));
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$new = (int) ($new xor ($this->state & pow(2,$i)));
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}
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}
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}
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}
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if($new == 0) {
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if($new == 0) {
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$ns++;
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$ns++;
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}
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}
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$this->state = $ns;
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$this->state = $ns;
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}
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}
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function run($ticks,$output = false) {
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function run($ticks,$output = false) {
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if($output) {
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if($output) {
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printf("%" . strlen($ticks) . "u: %0" . $this->length . "b\n",0,$this->state);
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printf("%" . strlen($ticks) . "u: %0" . $this->length . "b\n",0,$this->state);
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}
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}
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for($i=0;$i<$ticks;$i++) {
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for($i=0;$i<$ticks;$i++) {
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$this->tick();
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$this->tick();
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if($output) {
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if($output) {
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printf("%" . strlen($ticks) . "u: %0" . $this->length . "b\n",$i+1,$this->state);
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printf("%" . strlen($ticks) . "u: %0" . $this->length . "b\n",$i+1,$this->state);
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}
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}
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}
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}
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}
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}
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static function GetState($length,$ticks) {
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static function GetState($length,$ticks) {
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$VC = new self($length);
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$VC = new self($length);
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$VC->run($ticks);
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$VC->run($ticks);
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return $VC->state;
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return $VC->state;
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}
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}
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}
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}
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