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 "zbxnum.h"

​

#include "log.h"

​

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

 *                                                                            *

 * Purpose: check if the string is unsigned integer within the specified      *

 *          range and optionally store it into value parameter                *

 *                                                                            *

 * Parameters: str   - [IN] string to check                                   *

 *             n     - [IN] string length or ZBX_MAX_UINT64_LEN               *

 *             value - [OUT] a pointer to output buffer where the converted   *

 *                     value is to be written (optional, can be NULL)         *

 *             size  - [IN] size of the output buffer (optional)              *

 *             min   - [IN] the minimum acceptable value                      *

 *             max   - [IN] the maximum acceptable value                      *

 *                                                                            *

 * Return value:  SUCCEED - the string is unsigned integer                    *

 *                FAIL - the string is not a number or its value is outside   *

 *                       the specified range                                  *

 *                                                                            *

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

int zbx_is_uint_n_range(const char *str, size_t n, void *value, size_t size, zbx_uint64_t min, zbx_uint64_t max)

{

    zbx_uint64_t        value_uint64 = 0, c;

    const zbx_uint64_t  max_uint64 = ~__UINT64_C(0);

​

    if ('\0' == *str || 0 == n || sizeof(zbx_uint64_t) < size || (0 == size && NULL != value))

        return FAIL;

​

    while ('\0' != *str && 0 < n--)

    {

        if (0 == isdigit(*str))

            return FAIL;    /* not a digit */

​

        c = (zbx_uint64_t)(unsigned char)(*str - '0');

​

        if ((max_uint64 - c) / 10 < value_uint64)

            return FAIL;    /* maximum value exceeded */

​

        value_uint64 = value_uint64 * 10 + c;

​

        str++;

    }