1 /* 2 * kvlist - simple key/value store 3 * 4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 #ifndef __LIBUBOX_KVLIST_H 19 #define __LIBUBOX_KVLIST_H 20 21 #include "avl-cmp.h" 22 #include "avl.h" 23 24 struct kvlist { 25 struct avl_tree avl; 26 27 int (*get_len)(struct kvlist *kv, const void *data); 28 }; 29 30 struct kvlist_node { 31 struct avl_node avl; 32 33 char data[0] __attribute__((aligned(4))); 34 }; 35 36 #define KVLIST_INIT(_name, _get_len) \ 37 { \ 38 .avl = AVL_TREE_INIT(_name.avl, avl_strcmp, false, NULL), \ 39 .get_len = _get_len \ 40 } 41 42 #define KVLIST(_name, _get_len) \ 43 struct kvlist _name = KVLIST_INIT(_name, _get_len) 44 45 #define __ptr_to_kv(_ptr) container_of(((char *) (_ptr)), struct kvlist_node, data[0]) 46 #define __avl_list_to_kv(_l) container_of(_l, struct kvlist_node, avl.list) 47 48 #define kvlist_for_each(kv, name, value) \ 49 for (value = (void *) __avl_list_to_kv((kv)->avl.list_head.next)->data, \ 50 name = (const char *) __ptr_to_kv(value)->avl.key, (void) name; \ 51 &__ptr_to_kv(value)->avl.list != &(kv)->avl.list_head; \ 52 value = (void *) (__avl_list_to_kv(__ptr_to_kv(value)->avl.list.next))->data, \ 53 name = (const char *) __ptr_to_kv(value)->avl.key) 54 55 void kvlist_init(struct kvlist *kv, int (*get_len)(struct kvlist *kv, const void *data)); 56 void kvlist_free(struct kvlist *kv); 57 void *kvlist_get(struct kvlist *kv, const char *name); 58 bool kvlist_set(struct kvlist *kv, const char *name, const void *data); 59 bool kvlist_delete(struct kvlist *kv, const char *name); 60 61 int kvlist_strlen(struct kvlist *kv, const void *data); 62 int kvlist_blob_len(struct kvlist *kv, const void *data); 63 64 #endif 65
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