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.

**/

​

/* this file is for the minimal possible set of string related functions that are used by libzbxcommon.a */

/* or libraries/files it depends on */

​

#include "zbxcommon.h"

​

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

 *                                                                            *

 * Purpose: Secure version of vsnprintf function.                             *

 *          Add zero character at the end of string.                          *

 *                                                                            *

 * Parameters: str   - [IN/OUT] destination buffer pointer                    *

 *             count - [IN] size of destination buffer                        *

 *             fmt   - [IN] format                                            *

 *                                                                            *

 * Return value: the number of characters in the output buffer                *

 *               (not including the trailing '\0')                            *

 *                                                                            *

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

size_t  zbx_vsnprintf(char *str, size_t count, const char *fmt, va_list args)

{

    int written_len = 0;

​

    if (0 < count)

    {

        if (0 > (written_len = vsnprintf(str, count, fmt, args)))

            written_len = (int)count - 1;       /* count an output error as a full buffer */

        else

            written_len = MIN(written_len, (int)count - 1);     /* result could be truncated */

    }

    str[written_len] = '\0';    /* always write '\0', even if buffer size is 0 or vsnprintf() error */

​

    return (size_t)written_len;

}

​

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

 *                                                                            *

 * Purpose: dynamical formatted output conversion                             *

 *                                                                            *

 * Return value: formatted string                                             *

 *                                                                            *

 * Comments: returns a pointer to allocated memory                            *

 *                                                                            *

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

char    *zbx_dvsprintf(char *dest, const char *f, va_list args)