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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*/
#ifndef CIRC_LIST_H
#define CIRC_LIST_H
#include "basic.h"
#include "integer.h"
#include "error.h"
#define CIRC_LIST(name, type) \
struct name { \
int x_head; \
int x_size; \
int x_cap; \
int x_sizeof; \
type x_list[EMPTY_ARRAY_SIZE]; \
}
#define CIRC_LIST_PUSH(obj, item) \
{ \
(obj)->x_head = modulo_add((obj)->x_head, -1, (obj)->x_cap); \
(obj)->x_list[(obj)->x_head] = (item); \
(obj)->x_size = min_int((obj)->x_size + 1, (obj)->x_cap); \
}
#define CIRC_LIST_SIZE(obj) \
((obj)->x_size)
#define CIRC_LIST_INDEX(obj, index) \
modulo_add((obj)->x_head, \
index_verify((index), (obj)->x_size, __FILE__, __LINE__), \
(obj)->x_cap)
#define CIRC_LIST_ITEM(obj, index) \
((obj)->x_list[CIRC_LIST_INDEX((obj), (index))])
#define CIRC_LIST_RESET(obj) \
{ \
(obj)->x_head = 0; \
(obj)->x_size = 0; \
}
#define CIRC_LIST_ALLOC(dest, list_type, size) \
{ \
const int so = sizeof(list_type) + sizeof((dest)->x_list[0]) * (size); \
(dest) = (list_type *) malloc(so); \
check_malloc_return(dest); \
memset((dest), 0, so); \
(dest)->x_cap = size; \
(dest)->x_sizeof = so; \
}
#define CIRC_LIST_FREE(dest) \
free(dest)
#endif /* ifndef CIRC_LIST_H */
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