<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */


/**
 * Smarty truncate modifier plugin
 *
 * Type:     modifier<br>
 * Name:     truncate<br>
 * Purpose:  Truncate a string to a certain length if necessary,
 *           optionally splitting in the middle of a word, and
 *           appending the $etc string or inserting $etc into the middle.
 * @link http://smarty.php.net/manual/en/language.modifier.truncate.php
 *          truncate (Smarty online manual)
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @param string
 * @param integer
 * @param string
 * @param boolean
 * @param boolean
 * @return string
 */
function smarty_modifier_truncate_cn($string, $length = 80, $etc = '', $code = 'GB2312')
{
    if ($length == 0)
        return '';
    if ($code == 'UTF-8') {
        $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
    }
    else {
    $pa = "/[\x01-\x7f]|[\xa1-\xff][\xa1-\xff]/";
    }
    preg_match_all($pa, $string, $t_string);
    if (count($t_string[0]) > $length)
        return join('', array_slice($t_string[0], 0, $length)) . $etc;
    return join('', array_slice($t_string[0], 0, $length)) . $etc;
}

/* vim: set expandtab: */

?>
