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 "zbxhttp.h"

​

#include "zbxstr.h"

#include "punycode.h"

​

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

 *                                                                            *

 * Purpose: after each delta is encoded or decoded, bias should be set for    *

 *          the next delta (should be adapted)                                *

 *                                                                            *

 * Parameters: delta      - [IN] punycode delta (generalized variable-length  *

 *                               integer)                                     *

 *             count      - [IN] is the total number of code points encoded / *

 *                               decoded so far                               *

 *             divisor    - [IN] delta divisor (to avoid overflow)            *

 *                                                                            *

 * Return value: adapted bias                                                 *

 *                                                                            *

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

static zbx_uint32_t punycode_adapt(zbx_uint32_t delta, int count, int divisor)

{

    zbx_uint32_t    i;

​

    delta /= divisor;

    delta += delta / count;

​

    for (i = 0; PUNYCODE_BIAS_LIMIT < delta; i += PUNYCODE_BASE)

        delta /= PUNYCODE_BASE_MAX;

​

    return ((PUNYCODE_BASE * delta) / (delta + PUNYCODE_SKEW)) + i;

}

​

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

 *                                                                            *

 * Purpose: encodes punycode digit into ansi character [a-z0-9]               *

 *                                                                            *

 * Parameters: digit      - [IN] digit to encode                              *

 *                                                                            *

 * Return value: encoded character                                            *

 *                                                                            *

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

static char punycode_encode_digit(int digit)

{

    if (0 <= digit && 25 >= digit)