File Source for core.read_cache

<?php
/**
* Smarty plugin
* @package Smarty
* @subpackage plugins
*/
/**
* read a cache file, determine if it needs to be
* regenerated or not
*
* @param string $tpl_file
* @param string $cache_id
* @param string $compile_id
* @param string $results
* @return boolean
*/
// $tpl_file, $cache_id, $compile_id, &$results
function smarty_core_read_cache_file(&$params, &$smarty)
{
static $content_cache = array();
if ($smarty->force_compile) {
// force compile enabled, always regenerate
return false;
}
if (isset($content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']])) {
list($params['results'], $smarty->_cache_info) = $content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']];
return true;
}
if (!empty($smarty->cache_handler_func)) {
// use cache_handler function
call_user_func_array($smarty->cache_handler_func,
array('read', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
} else {
// use local cache file
$_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);
$_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);
$params['results'] = $smarty->_read_file($_cache_file);
}
if (empty($params['results'])) {
// nothing to parse (error?), regenerate cache
return false;
}
$_contents = $params['results'];
$_info_start = strpos($_contents, "\n") + 1;
$_info_len = (int)substr($_contents, 0, $_info_start - 1);
$_cache_info = unserialize(substr($_contents, $_info_start, $_info_len));
$params['results'] = substr($_contents, $_info_start + $_info_len);
if ($smarty->caching == 2 && isset ($_cache_info['expires'])){
// caching by expiration time
if ($_cache_info['expires'] > -1 && (time() > $_cache_info['expires'])) {
// cache expired, regenerate
return false;
}
} else {
// caching by lifetime
if ($smarty->cache_lifetime > -1 && (time() - $_cache_info['timestamp'] > $smarty->cache_lifetime)) {
// cache expired, regenerate
return false;
}
}
if ($smarty->compile_check) {
$_params = array('get_source' => false, 'quiet'=>true);
foreach (array_keys($_cache_info['template']) as $_template_dep) {
$_params['resource_name'] = $_template_dep;
if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
// template file has changed, regenerate cache
return false;
}
}
if (isset($_cache_info['config'])) {
$_params = array('resource_base_path' => $smarty->config_dir, 'get_source' => false, 'quiet'=>true);
foreach (array_keys($_cache_info['config']) as $_config_dep) {
$_params['resource_name'] = $_config_dep;
if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
// config file has changed, regenerate cache
return false;
}
}
}
}
$content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']] = array($params['results'], $_cache_info);
$smarty->_cache_info = $_cache_info;
return true;
}
/* vim: set expandtab: */
?>

Source for file core.read_cache_file.php