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