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/*
* kvlist - simple key/value store
*
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __LIBUBOX_KVLIST_H
#define __LIBUBOX_KVLIST_H
#include "avl-cmp.h"
#include "avl.h"
struct kvlist {
struct avl_tree avl;
int (*get_len)(struct kvlist *kv, const void *data);
};
struct kvlist_node {
struct avl_node avl;
char data[0] __attribute__((aligned(4)));
};
#define KVLIST_INIT(_name, _get_len) \
{ \
.avl = AVL_TREE_INIT(_name.avl, avl_strcmp, false, NULL), \
.get_len = _get_len \
}
#define KVLIST(_name, _get_len) \
struct kvlist _name = KVLIST_INIT(_name, _get_len)
#define __ptr_to_kv(_ptr) container_of(((char *) (_ptr)), struct kvlist_node, data[0])
#define __avl_list_to_kv(_l) container_of(_l, struct kvlist_node, avl.list)
#define kvlist_for_each(kv, name, value) \
for (value = (void *) __avl_list_to_kv((kv)->avl.list_head.next)->data, \
name = (const char *) __ptr_to_kv(value)->avl.key, (void) name; \
&__ptr_to_kv(value)->avl.list != &(kv)->avl.list_head; \
value = (void *) (__avl_list_to_kv(__ptr_to_kv(value)->avl.list.next))->data, \
name = (const char *) __ptr_to_kv(value)->avl.key)
void kvlist_init(struct kvlist *kv, int (*get_len)(struct kvlist *kv, const void *data));
void kvlist_free(struct kvlist *kv);
void *kvlist_get(struct kvlist *kv, const char *name);
bool kvlist_set(struct kvlist *kv, const char *name, const void *data);
bool kvlist_delete(struct kvlist *kv, const char *name);
int kvlist_strlen(struct kvlist *kv, const void *data);
int kvlist_blob_len(struct kvlist *kv, const void *data);
#endif
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