From 93a500780fdf184b38a9513b1ed89a0084b749f9 Mon Sep 17 00:00:00 2001
From: Stricted <info@nexus-irc.de>
Date: Mon, 17 Feb 2014 00:52:38 +0100
Subject: [PATCH] add APC class

---
 APC.class.php | 205 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 APC.class.php

diff --git a/APC.class.php b/APC.class.php
new file mode 100644
index 0000000..27693bb
--- /dev/null
+++ b/APC.class.php
@@ -0,0 +1,205 @@
+<?php
+/**
+ * @author      Jan Altensen (Stricted)
+ * @copyright   2013-2014 Jan Altensen (Stricted)
+ * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ */
+class APC {
+	/**
+	 * php extension
+	 * @var	string
+	 */
+	protected $apcu = false;
+	
+	/**
+	 * APC(u) version
+	 * @var integer
+	 */
+	public $version = 0;
+	
+	/**
+	 * init APC class
+	 */
+	public function __construct () {
+		if (extension_loaded("apcu")) {
+			$this->apcu = true;
+			$this->version = phpversion('apcu');
+		} else if (extension_loaded("apc")) {
+			$this->version = phpversion('apc');
+		} else {
+			throw new Exception('APC/APCu support is not enabled.');
+		}
+	}
+	
+	/**
+	 * deletes a cache item
+	 *
+	 * @param	string	$key
+	 * @return	boolean
+	 */
+	public function delete ($key) {
+		if ($this->exists($key)) {
+			if ($this->apcu) {
+				return apcu_delete($key);
+			}
+			else {
+				return apc_delete($key);
+			}
+		}
+	}
+	
+	/**
+	 * fetch a cache item
+	 *
+	 * @param	string	$key
+	 * @return	string
+	 */
+	public function fetch ($key) {
+		if ($this->exists($key)) {
+			$cacheTime = $this->getCacheTime($key);
+			if ($cacheTime['ttl'] > 0 && (TIME_NOW - $cacheTime['mtime']) > $cacheTime['ttl']) {
+				$this->delete($key);
+				return null;
+			}
+			
+			if ($this->apcu) {
+				return apcu_fetch($key);
+			}
+			else {
+				return apc_fetch($key);
+			}
+		}
+		
+		return null;
+	}
+	
+	/**
+	 * store a cache item
+	 *
+	 * @param	string	$key
+	 * @param	string	$var
+	 * @param	integer	$ttl <optional>
+	 * @return	boolean
+	 */
+	public function store ($key, $var, $ttl = 0) {
+		$this->delete($key); // remove cache entry if allready exists
+		
+		if ($this->apcu) {
+			apcu_store($key, $var, $ttl);
+		}
+		else {
+			apc_store($key, $var, $ttl);
+		}
+	}
+	
+	/**
+	 * Checks if APC/APCu key exists
+	 *
+	 * @param	string	$key
+	 * @return	boolean
+	 */
+	protected function exists ($key) {
+		$cacheItems = array();
+		foreach ($this->cache_info() as $item) {
+			$cacheItems[] = $item['info'];
+		}
+		return in_array($key, $cacheItems);
+	}
+	
+	/**
+	 * get cache lifetime
+	 *
+	 * @param	string	$key
+	 * @return	array
+	 */
+	protected function getCacheTime ($key) {
+		$cacheItems = array();
+		foreach ($this->cache_info() as $item) {
+			if ($item['info'] == $key) {
+				return array(
+					"ttl" => $item['ttl'],
+					"mtime" => $item['mtime']
+					);
+			}
+		}
+	}
+		
+	/**
+	 * get cache items
+	 *
+	 * @param	string	$cache_type <optional>
+	 * @return	array
+	 */
+	public function cache_info ($cache_type = "") {
+		$info = array();
+		
+		if ($this->apcu) {
+			$apcinfo = apcu_cache_info($cache_type);
+		}
+		else {
+			// APC need cache_type = 'user'
+			if ($cache_type == "") $cache_type = "user";
+			
+			$apcinfo = apc_cache_info($cache_type);
+		}
+		
+		if (isset($apcinfo['cache_list'])) {
+			$cacheList = $apcinfo['cache_list'];
+			
+			usort($cacheList, array($this, "usort"));
+			
+			foreach ($cacheList as $cache) {
+				// make APCu output compatible with APC
+				
+				if (isset($cache['key'])) {
+					$cache['info'] = $cache['key'];
+					unset($cache['key']);
+				}
+				
+				if (!isset($cache['type'])) {
+					$cache['type'] = 'user';
+				}
+				
+				if (isset($cache['nhits'])) {
+					$cache['num_hits'] = $cache['nhits'];
+					unset($cache['nhits']);
+				}
+				
+				if (isset($cache['ctime'])) {
+					$cache['creation_time'] = $cache['ctime'];
+					unset($cache['ctime']);
+				}
+				
+				if (isset($cache['dtime'])) {
+					$cache['deletion_time'] = $cache['dtime'];
+					unset($cache['dtime']);
+				}
+				
+				if (isset($cache['atime'])) {
+					$cache['access_time'] = $cache['atime'];
+					unset($cache['atime']);
+				}
+				
+				$info[] = $cache;
+			}
+		}
+		
+		return $info;
+	}
+	
+	/**
+	 * sort the given data
+	 *
+	 * @param	array	$a
+	 * @param	array	$b
+	 * @return	array
+	 */
+	protected function usort ($a, $b) {
+		if (isset($a['key']) && isset($b['key'])) {
+			return $a['key'] > $b['key'];
+		}
+		else if (isset($a['info']) && isset($b['info'])) {
+			return $a['info'] > $b['info'];
+		}
+	}
+}
-- 
2.20.1