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