Zabbix

/*

** 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.

**/

​

#include "trends.h"

​

#include "zbxcommon.h"

#include "zbxdbhigh.h"

#include "log.h"

#include "zbxdb.h"

#include "zbxcacheconfig.h"

​

static char *trends_errors[ZBX_TREND_STATE_COUNT] = {

        "unknown error",

        NULL,

        "not enough data",

        "value is too large"

};

​

/******************************************************************************

 *                                                                            *

 * Purpose: parse largest period base from function parameters                *

 *                                                                            *

 * Parameters: shift  - [IN] the period shift parameter                       *

 *             base   - [OUT] the period shift base (now/?)                   *

 *             error  - [OUT] the error message if parsing failed             *

 *                                                                            *

 * Return value: SUCCEED - period was parsed successfully                     *

 *               FAIL    - invalid time period was specified                  *

 *                                                                            *

 ******************************************************************************/

static int  trends_parse_base(const char *period_shift, zbx_time_unit_t *base, char **error)

{

    zbx_time_unit_t time_unit = ZBX_TIME_UNIT_UNKNOWN;

    const char  *ptr;

​

    for (ptr = period_shift; NULL != (ptr = strchr(ptr, '/'));)

    {

        zbx_time_unit_t tu;

​

        if (ZBX_TIME_UNIT_UNKNOWN == (tu = zbx_tm_str_to_unit(++ptr)))

        {

            *error = zbx_strdup(*error, "invalid period shift cycle");

            return FAIL;

        }

​

        if (tu > time_unit)

            time_unit = tu;

    }

​

    if (ZBX_TIME_UNIT_UNKNOWN == time_unit)

    {

        *error = zbx_strdup(*error, "invalid period shift expression");

        return FAIL;

    }

​

    *base = time_unit;

​

    return SUCCEED;

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: parse largest period base from function parameters                *

 *                                                                            *

 * Parameters: params - [IN] the function parameters                          *

 *             base   - [OUT] the period shift base (now/?)                   *

 *             error  - [OUT] the error message if parsing failed             *

 *                                                                            *

 * Return value: SUCCEED - period was parsed successfully                     *

 *               FAIL    - invalid time period was specified                  *

 *                                                                            *

 ******************************************************************************/

int zbx_trends_parse_base(const char *params, zbx_time_unit_t *base, char **error)

{

    const char  *period_shift;