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/www/crm/libraries/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/

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Current File : //home/akaindir/www/crm/libraries/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Number.php
<?php

/**
 * Validates a number as defined by the CSS spec.
 */
class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
{

    /**
     * Bool indicating whether or not only positive values allowed.
     */
    protected $non_negative = false;

    /**
     * @param $non_negative Bool indicating whether negatives are forbidden
     */
    public function __construct($non_negative = false) {
        $this->non_negative = $non_negative;
    }

    /**
     * @warning Some contexts do not pass $config, $context. These
     *          variables should not be used without checking HTMLPurifier_Length
     */
    public function validate($number, $config, $context) {

        $number = $this->parseCDATA($number);

        if ($number === '') return false;
        if ($number === '0') return '0';

        $sign = '';
        switch ($number[0]) {
            case '-':
                if ($this->non_negative) return false;
                $sign = '-';
            case '+':
                $number = substr($number, 1);
        }

        if (ctype_digit($number)) {
            $number = ltrim($number, '0');
            return $number ? $sign . $number : '0';
        }

        // Period is the only non-numeric character allowed
        if (strpos($number, '.') === false) return false;

        list($left, $right) = explode('.', $number, 2);

        if ($left === '' && $right === '') return false;
        if ($left !== '' && !ctype_digit($left)) return false;

        $left  = ltrim($left,  '0');
        $right = rtrim($right, '0');

        if ($right === '') {
            return $left ? $sign . $left : '0';
        } elseif (!ctype_digit($right)) {
            return false;
        }

        return $sign . $left . '.' . $right;

    }

}

// vim: et sw=4 sts=4

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