Zabbix

/*

** Zabbix

** 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 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.

**/

​

#include "checks_calculated.h"

#include "zbxserver.h"

#include "log.h"

​

int get_value_calculated(DC_ITEM *dc_item, AGENT_RESULT *result)

{

    int         ret = NOTSUPPORTED;

    char            *error = NULL;

    zbx_eval_context_t  ctx;

    zbx_variant_t       value;

    zbx_timespec_t      ts;

    zbx_expression_eval_t   eval;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s() key:'%s' expression:'%s'", __func__, dc_item->key_orig, dc_item->params);

​

    if (NULL == dc_item->formula_bin)

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() serialized formula is not set", __func__);

        SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot evaluate calculated item:"

                " serialized formula is not set"));

        goto out;

    }

​

    zbx_eval_deserialize(&ctx, dc_item->params, ZBX_EVAL_PARSE_CALC_EXPRESSION, dc_item->formula_bin);

    zbx_timespec(&ts);

​

    zbx_expression_eval_init(&eval, ZBX_EXPRESSION_AGGREGATE, &ctx);

    zbx_expression_eval_resolve_item_hosts(&eval, dc_item);

    zbx_expression_eval_resolve_filter_macros(&eval, dc_item);

​

    if (SUCCEED != zbx_expression_eval_execute(&eval, &ts, &value, &error))

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() error:%s", __func__, error);

        SET_MSG_RESULT(result, error);

        error = NULL;

    }

    else

    {

        zabbix_log(LOG_LEVEL_DEBUG, "%s() value:%s", __func__, zbx_variant_value_desc(&value));

​

        switch (value.type)

        {

            case ZBX_VARIANT_DBL:

                SET_DBL_RESULT(result, value.data.dbl);