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<?php
/*
** Zabbix
** Copyright (C) 2001-2020 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 LLD macros.
*/
class CLLDMacroParser 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;
}
$p++;
if (!isset($source[$p]) || $source[$p] !== '#') {
return CParser::PARSE_FAIL;
}
$p++;
for (; isset($source[$p]) && $this->isMacroChar($source[$p]); $p++) {
}
if ($p == $pos + 2 || !isset($source[$p]) || $source[$p] !== '}') {
return CParser::PARSE_FAIL;
}
$p++;
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
return (isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS);
}
/**
* Returns true if the char is allowed in the macro, false otherwise
*
* @param string $c
*
* @return bool
*/
private function isMacroChar($c) {
return (($c >= 'A' && $c <= 'Z') || $c == '.' || $c == '_' || ($c >= '0' && $c <= '9'));
}
}
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