107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* $OpenBSD: dict.c,v 1.2 2014/04/28 13:08:34 syl Exp $ */
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/*
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* Copyright (c) 2012 Gilles Chehade <gilles@poolp.org>
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* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
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*
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* Permission to use, copy, modify, and 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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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fuse_private.h"
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#define MAX_DICTKEY_SIZE NAME_MAX
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struct dictentry {
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SPLAY_ENTRY(dictentry) entry;
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char key[MAX_DICTKEY_SIZE + 1];
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void *data;
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};
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static int dictentry_cmp(struct dictentry *, struct dictentry *);
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SPLAY_PROTOTYPE(dict, dictentry, entry, dictentry_cmp);
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int
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dict_check(struct dict *d, const char *k)
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{
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struct dictentry key;
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if (strlcpy(key.key, k, sizeof key.key) >= sizeof key.key)
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errx(1, "dict_check(%p, %s): key too large", d, k);
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return (SPLAY_FIND(dict, d, &key) != NULL);
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}
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void *
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dict_set(struct dict *d, const char *k, void *data)
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{
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struct dictentry *entry, key;
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if (strlcpy(key.key, k, sizeof key.key) >= sizeof key.key)
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errx(1, "dict_set(%p, %s): key too large", d, k);
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if ((entry = SPLAY_FIND(dict, d, &key)) == NULL) {
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entry = malloc(sizeof *entry);
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if (entry == NULL)
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return (NULL);
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strlcpy(entry->key, k, sizeof entry->key);
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SPLAY_INSERT(dict, d, entry);
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}
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entry->data = data;
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return (entry);
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}
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void *
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dict_get(struct dict *d, const char *k)
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{
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struct dictentry key, *entry;
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if (strlcpy(key.key, k, sizeof key.key) >= sizeof key.key)
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errx(1, "dict_get(%p, %s): key too large", d, k);
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if ((entry = SPLAY_FIND(dict, d, &key)) == NULL)
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return (NULL);
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return (entry->data);
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}
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void *
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dict_pop(struct dict *d, const char *k)
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{
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struct dictentry key, *entry;
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void *data;
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if (strlcpy(key.key, k, sizeof key.key) >= sizeof key.key)
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errx(1, "dict_pop(%p, %s): key too large", d, k);
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if ((entry = SPLAY_FIND(dict, d, &key)) == NULL)
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return (NULL);
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data = entry->data;
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SPLAY_REMOVE(dict, d, entry);
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free(entry);
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return (data);
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}
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static int
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dictentry_cmp(struct dictentry *a, struct dictentry *b)
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{
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return strcmp(a->key, b->key);
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}
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SPLAY_GENERATE(dict, dictentry, entry, dictentry_cmp);
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