Zabbix

<?php

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

** See the GNU Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

/**

 * A parser for function id macros.

 */

class CFunctionIdParser extends CParser {

​

    /**

     * @param string    $source

     * @param int       $pos

     *

     * @return int

     */

    public function parse($source, $pos = 0) {

        $this->length = 0;

        $this->match = '';

​

        $p = $pos;

​

        if (!isset($source[$p]) || $source[$p] !== '{') {

            return CParser::PARSE_FAIL;

        }

        $p++;

​

        for (; isset($source[$p]) && ($source[$p] >= '0' && $source[$p] <= '9'); $p++) {

            // Code is not missing here.

        }

​

        if ($p == $pos + 1 || !isset($source[$p]) || $source[$p] !== '}') {

            return CParser::PARSE_FAIL;

        }

        $p++;

​

        $functionid = substr($source, $pos + 1, $p - $pos - 2);

​

        if (bccomp(1, $functionid) > 0 ||  bccomp($functionid, ZBX_DB_MAX_ID) > 0) {

            return CParser::PARSE_FAIL;

        }

​

        $this->length = $p - $pos;

        $this->match = substr($source, $pos, $this->length);

​

        return (isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS);

    }

}