晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /home/akaindir/public_html/crm/libraries/htmlpurifier/library/HTMLPurifier/AttrDef/URI/

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Current File : /home/akaindir/public_html/crm/libraries/htmlpurifier/library/HTMLPurifier/AttrDef/URI/IPv6.php
<?php

/**
 * Validates an IPv6 address.
 * @author Feyd @ forums.devnetwork.net (public domain)
 * @note This function requires brackets to have been removed from address
 *       in URI.
 */
class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
{

    public function validate($aIP, $config, $context) {

        if (!$this->ip4) $this->_loadRegex();

        $original = $aIP;

        $hex = '[0-9a-fA-F]';
        $blk = '(?:' . $hex . '{1,4})';
        $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))';   // /0 - /128

        //      prefix check
        if (strpos($aIP, '/') !== false)
        {
                if (preg_match('#' . $pre . '$#s', $aIP, $find))
                {
                        $aIP = substr($aIP, 0, 0-strlen($find[0]));
                        unset($find);
                }
                else
                {
                        return false;
                }
        }

        //      IPv4-compatiblity check
        if (preg_match('#(?<=:'.')' . $this->ip4 . '$#s', $aIP, $find))
        {
                $aIP = substr($aIP, 0, 0-strlen($find[0]));
                $ip = explode('.', $find[0]);
                $ip = array_map('dechex', $ip);
                $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
                unset($find, $ip);
        }

        //      compression check
        $aIP = explode('::', $aIP);
        $c = count($aIP);
        if ($c > 2)
        {
                return false;
        }
        elseif ($c == 2)
        {
                list($first, $second) = $aIP;
                $first = explode(':', $first);
                $second = explode(':', $second);

                if (count($first) + count($second) > 8)
                {
                        return false;
                }

                while(count($first) < 8)
                {
                        array_push($first, '0');
                }

                array_splice($first, 8 - count($second), 8, $second);
                $aIP = $first;
                unset($first,$second);
        }
        else
        {
                $aIP = explode(':', $aIP[0]);
        }
        $c = count($aIP);

        if ($c != 8)
        {
                return false;
        }

        //      All the pieces should be 16-bit hex strings. Are they?
        foreach ($aIP as $piece)
        {
                if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece)))
                {
                        return false;
                }
        }

        return $original;

    }

}

// vim: et sw=4 sts=4

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