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 "item_preproc.h"

​

#include "zbxregexp.h"

#include "zbxembed.h"

#include "zbxvariant.h"

#include "zbxtime.h"

#include "zbxjson.h"

#include "zbxstr.h"

​

#include "zbxxml.h"

#ifdef HAVE_LIBXML2

#   include <libxml/xpath.h>

#   include <libxml/parser.h>

#endif

​

#include "zbxnum.h"

​

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

 *                                                                            *

 * Purpose: returns numeric type hint based on item value type                *

 *                                                                            *

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

 *                                                                            *

 * Return value: variant numeric type or none                                 *

 *                                                                            *

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

static int  item_preproc_numeric_type_hint(unsigned char value_type)

{

    switch (value_type)

    {

        case ITEM_VALUE_TYPE_FLOAT:

            return ZBX_VARIANT_DBL;

        case ITEM_VALUE_TYPE_UINT64:

            return ZBX_VARIANT_UI64;

        default:

            return ZBX_VARIANT_NONE;

    }

}

​

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

 *                                                                            *

 * Purpose: convert variant value to the requested type                       *

 *                                                                            *

 * Parameters: value  - [IN/OUT] value to convert                             *

 *             type   - [IN] new value type                                   *

 *             errmsg - [OUT]                                                 *

 *                                                                            *

 * Return value: SUCCEED - the value was converted successfully               *

 *               FAIL - otherwise, errmsg contains the error message          *

 *                                                                            *

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

int item_preproc_convert_value(zbx_variant_t *value, unsigned char type, char **errmsg)

{

    if (FAIL == zbx_variant_convert(value, type))

    {

        *errmsg = zbx_dsprintf(*errmsg, "cannot convert value to %s", zbx_get_variant_type_desc(type));

        return FAIL;

    }

​

    return SUCCEED;

}

​

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

 *                                                                            *

 * Purpose: converts variant value to numeric                                 *

 *                                                                            *

 * Parameters: value_num  - [OUT] converted value                             *

 *             value      - [IN] value to convert                             *

 *             value_type - [IN] item value type                              *

 *             errmsg     - [OUT]                                             *

 *                                                                            *

 * Return value: SUCCEED - the value was converted successfully               *

 *               FAIL - otherwise                                             *

 *                                                                            *

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

int zbx_item_preproc_convert_value_to_numeric(zbx_variant_t *value_num, const zbx_variant_t *value,

        unsigned char value_type, char **errmsg)