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 "pp_execute.h"

#include "pp_cache.h"

#include "pp_error.h"

#include "log.h"

#include "item_preproc.h"

#include "zbxprometheus.h"

#include "zbxxml.h"

#include "preproc_snmp.h"

​

#ifdef HAVE_LIBXML2

#   ifndef LIBXML_THREAD_ENABLED

#       error Zabbix requires libxml2 library built with thread support.

#   endif

#endif

​

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

 *                                                                            *

 * Purpose: execute 'multiply by' step                                        *

 *                                                                            *

 * Parameters: value_type - [IN] the item value type                          *

 *             value      - [IN/OUT] the input/output value                   *

 *             params     - [IN] the preprocessing parameters                 *

 *                                                                            *

 * Result value: SUCCEED - the preprocessing step was executed successfully.  *

 *               FAIL    - otherwise. The error message is stored in value.   *

 *                                                                            *

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

static int  pp_execute_multiply(unsigned char value_type, zbx_variant_t *value, const char *params)

{

    char    buffer[MAX_STRING_LEN], *error = NULL, *errmsg = NULL;

​

    zbx_strlcpy(buffer, params, sizeof(buffer));

    zbx_trim_float(buffer);

​

    if (FAIL == zbx_is_double(buffer, NULL))

    {

        error = zbx_dsprintf(NULL, "a numerical value is expected or the value is out of range");

    }

    else if (SUCCEED == item_preproc_multiplier_variant(value_type, value, buffer, &errmsg))

    {

        return SUCCEED;

    }

    else

    {

        error = zbx_dsprintf(NULL, "cannot apply multiplier \"%s\" to value of type \"%s\": %s",

            params, zbx_variant_type_desc(value), errmsg);

        zbx_free(errmsg);

    }

​

    zbx_variant_clear(value);

    zbx_variant_set_error(value, error);

​

    return FAIL;

}

​

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

 *                                                                            *

 * Purpose: return preprocessing 'trim' step descriptions for error messages  *

 *                                                                            *

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

static const char   *pp_trim_desc(int type)

{

    switch (type)

    {

        case ZBX_PREPROC_RTRIM:

            return "right ";

        case ZBX_PREPROC_LTRIM:

            return "left ";

        default:

            return "";

    }

}