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/>.

**/

​

​

class CMacroFunction {

​

    /**

     * Calculates regular expression substitution. Returns UNRESOLVED_MACRO_STRING in case of incorrect function

     * parameters or regular expression.

     *

     * @param string $value        [IN] The input value.

     * @param array  $parameters   [IN] The function parameters.

     * @param bool   $insensitive  [IN] Case insensitive match.

     *

     * @return string

     */

    private static function macrofuncRegsub(string $value, array $parameters, bool $insensitive): string {

        if (count($parameters) != 2) {

            return UNRESOLVED_MACRO_STRING;

        }

​

        set_error_handler(function ($errno, $errstr) {});

        $rc = preg_match('/'.$parameters[0].'/'.($insensitive ? 'i' : ''), $value, $matches);

        restore_error_handler();

​

        if ($rc === false) {

            return UNRESOLVED_MACRO_STRING;

        }

​

        $macro_values = [];

        for ($i = 0; $i <= 9; $i++) {

            $macro_values['\\'.$i] = array_key_exists($i, $matches) ? $matches[$i] : '';

        }

​

        return strtr($parameters[1], $macro_values);

    }

​

    /**

     * Calculates number formatting macro function. Returns UNRESOLVED_MACRO_STRING in case of incorrect function

     * parameters or value. Formatting is not applied to integer values.

     *

     * @param string $value       [IN] The input value.

     * @param array  $parameters  [IN] The function parameters.

     *

     * @return string

     */

    private static function macrofuncFmtnum(string $value, array $parameters): string {

        if (count($parameters) != 1 || $parameters[0] == '') {

            return UNRESOLVED_MACRO_STRING;

        }

​

        $parser = new CNumberParser(['with_float' => false]);

​

        if ($parser->parse($value) == CParser::PARSE_SUCCESS) {

            return $value;

        }

​

        $parser = new CNumberParser();

​

        if ($parser->parse($value) != CParser::PARSE_SUCCESS) {

            return UNRESOLVED_MACRO_STRING;

        }

​

        if (!ctype_digit($parameters[0]) || (int) $parameters[0] > 20) {

            return UNRESOLVED_MACRO_STRING;

        }

​

        return sprintf('%.'.$parameters[0].'f', (float) $value);

    }

​

    /**

     * Calculates time formatting macro function. Returns UNRESOLVED_MACRO_STRING in case of incorrect function

     * parameters or value.

     *

     * @param string $value        [IN] The input value.

     * @param array  $parameters   [IN] The function parameters.

     *

     * @return string

     */