bug #96 move libraries to library - better alignment of like rotator

library/phpsec/PHP/Compat/Function/str_split.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * Replace str_split()
+ *
+ * @category    PHP
+ * @package     PHP_Compat
+ * @license     LGPL - http://www.gnu.org/licenses/lgpl.html
+ * @copyright   2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
+ * @link        http://php.net/function.str_split
+ * @author      Aidan Lister <aidan@php.net>
+ * @version     $Revision: 1.1 $
+ * @since       PHP 5
+ * @require     PHP 4.0.0 (user_error)
+ */
+function php_compat_str_split($string, $split_length = 1)
+{
+    if (!is_scalar($split_length)) {
+        user_error('str_split() expects parameter 2 to be long, ' .
+            gettype($split_length) . ' given', E_USER_WARNING);
+        return false;
+    }
+
+    $split_length = (int) $split_length;
+    if ($split_length < 1) {
+        user_error('str_split() The length of each segment must be greater than zero', E_USER_WARNING);
+        return false;
+    }
+    
+    // Select split method
+    if ($split_length < 65536) {
+        // Faster, but only works for less than 2^16
+        preg_match_all('/.{1,' . $split_length . '}/s', $string, $matches);
+        return $matches[0];
+    } else {
+        // Required due to preg limitations
+        $arr = array();
+        $idx = 0;
+        $pos = 0;
+        $len = strlen($string);
+
+        while ($len > 0) {
+            $blk = ($len < $split_length) ? $len : $split_length;
+            $arr[$idx++] = substr($string, $pos, $blk);
+            $pos += $blk;
+            $len -= $blk;
+        }
+
+        return $arr;
+    }
+}
+
+
+// Define
+if (!function_exists('str_split')) {
+    function str_split($string, $split_length = 1)
+    {
+        return php_compat_str_split($string, $split_length);
+    }
+}