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<?php declare(strict_types = 0);
/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* A parser for function macros like "{?<trigger expression>}".
*/
class C10ExpressionMacroParser extends CParser {
/**
* @var C10TriggerExpression
*/
protected $trigger_expression_parser;
/**
* Set up necessary parsers.
*/
public function __construct() {
$this->trigger_expression_parser = new C10TriggerExpression([
'host_macro' => ['{HOST.HOST}']
]);
}
/**
* @param string $source
* @param int $pos
*
* @return int
*/
public function parse($source, $pos = 0) {
$this->length = 0;
$this->match = '';
$p = $pos;
if (!isset($source[$p]) || substr($source, $p, 2) !== '{?') {
$this->errorPos($source, $p);
return CParser::PARSE_FAIL;
}
$p += 2;
$this->trigger_expression_parser->parse(substr($source, $p));
if ($this->trigger_expression_parser->error_type !== C10TriggerExpression::ERROR_UNPARSED_CONTENT) {
$this->errorPos($source, $p + $this->trigger_expression_parser->error_pos);
return CParser::PARSE_FAIL;
}
$p += $this->trigger_expression_parser->error_pos;
if (!isset($source[$p]) || $source[$p] !== '}') {
$this->errorPos($source, $p);
return CParser::PARSE_FAIL;
}
$p++;
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
return (isset($source[$pos + $this->length]) ? CParser::PARSE_SUCCESS_CONT : CParser::PARSE_SUCCESS);
}
}
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