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 Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "pp_execute.h"

#include "pp_cache.h"

#include "pp_error.h"

#include "item_preproc.h"

#include "zbxpreprocbase.h"

#include "zbxprometheus.h"

#include "zbxxml.h"

#include "preproc_snmp.h"

#include "zbxvariant.h"

#include "zbxtime.h"

#include "zbxjson.h"

#include "zbxnum.h"

#include "zbxstr.h"

​

#ifdef HAVE_LIBXML2

#   ifndef LIBXML_THREAD_ENABLED

#       error Zabbix requires libxml2 library built with thread support.

#   endif

#endif

​

#define PP_VALUE_LOG_LIMIT  4096

​

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

 *                                                                            *

 * Purpose: execute 'multiply by' step                                        *

 *                                                                            *

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

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

 *             params     - [IN] 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 "";