+<?php
+/********************************* PHP-P10 ******************************
+ * P10 uplink class by pk910 (c)2011 pk910 *
+ ************************************************************************
+ * Version 2 (OOP) *
+ * *
+ * PHP-P10 is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with PHP-P10; if not, write to the Free Software Foundation, *
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *
+ * *
+ ************************************************************************
+ *
+ * Uplink/Numerics.class.php
+ *
+ * P10 numeric functions
+ *
+ ************************************************************************
+ * accessable functions
+ *
+ * static String intToNum(int $int, int $length)
+ * returns the numeric representing $int
+ *
+ * static int numToInt(String $numeric)
+ * returns the integer value, the numeric represents
+ */
+
+class Numerics {
+ private static $base64chars = array(
+ 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
+ 'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
+ 'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
+ 'w','x','y','z','0','1','2','3','4','5','6','7','8','9','[',']'
+ );
+ private static $base64charsLength = 64;
+
+ public static function intToNum($int, $length) {
+ //fix a small "bug": normaly 0 = AAAAA but we need 1 = AAAAA
+ $int = $int - 1;
+
+ $numeric = "";
+ for($pos = $length-1; $pos >= 0; $pos--) {
+ //current position represents floor($int / ($base64charsLength ^ $pos))
+ $base = 1;
+ for($i = 0; $i < $pos; $i++) {
+ $base = $base * self::$base64charsLength;
+ }
+ $posValue = floor($int / $base);
+ //get the char representing $posValue
+ $posChar = self::$base64chars[$posValue];
+ $numeric .= $posChar;
+ }
+
+ return $numeric;
+ }
+
+ public static function numToInt($numeric) {
+ $base = 1;
+ $int = 0;
+ for($pos = strlen($numeric)-1; $pos >= 0; $pos--) {
+ $posValue = array_search($numeric[$pos], self::$base64chars);
+ $int = ($posValue * $base);
+ $base = $base * self::$base64charsLength;
+ }
+
+ //fix a small "bug": normaly 0 = AAAAA but we need 1 = AAAAA
+ $int = $int + 1;
+
+ return $int;
+ }
+
+}
+
+?>
\ No newline at end of file