mirror of
https://github.com/curl/curl.git
synced 2024-11-21 01:16:58 +08:00
2cff251863
counter so that the caller needs to decrease that counter when done with the returned data. If compiled with MALLOCDEBUG I've added some extra checking that the counter is decreased before a handle is closed etc.
309 lines
6.5 KiB
C
309 lines
6.5 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at http://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* $Id$
|
|
***************************************************************************/
|
|
|
|
#include "setup.h"
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "hash.h"
|
|
#include "llist.h"
|
|
|
|
#ifdef MALLOCDEBUG
|
|
/* this must be the last include file */
|
|
#include "memdebug.h"
|
|
#endif
|
|
|
|
|
|
/* {{{ static unsigned long _hash_str (const char *, size_t)
|
|
*/
|
|
static unsigned long
|
|
_hash_str (const char *key, size_t key_length)
|
|
{
|
|
char *end = (char *) key + key_length;
|
|
unsigned long h = 5381;
|
|
|
|
while (key < end) {
|
|
h += h << 5;
|
|
h ^= (unsigned long) *key++;
|
|
}
|
|
|
|
return h;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ static void _hash_element_dtor (void *, void *)
|
|
*/
|
|
static void
|
|
_hash_element_dtor (void *user, void *element)
|
|
{
|
|
curl_hash *h = (curl_hash *) user;
|
|
curl_hash_element *e = (curl_hash_element *) element;
|
|
|
|
if (e->key) {
|
|
free(e->key);
|
|
}
|
|
|
|
h->dtor(e->ptr);
|
|
|
|
free(e);
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ void curl_hash_init (curl_hash *, int, curl_hash_dtor)
|
|
*/
|
|
void
|
|
Curl_hash_init (curl_hash *h, int slots, curl_hash_dtor dtor)
|
|
{
|
|
int i;
|
|
|
|
h->dtor = dtor;
|
|
h->size = 0;
|
|
h->slots = slots;
|
|
|
|
h->table = (curl_llist **) malloc(slots * sizeof(curl_llist *));
|
|
for (i = 0; i < slots; ++i) {
|
|
h->table[i] = Curl_llist_alloc((curl_llist_dtor) _hash_element_dtor);
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ curl_hash *curl_hash_alloc (int, curl_hash_dtor)
|
|
*/
|
|
curl_hash *
|
|
Curl_hash_alloc (int slots, curl_hash_dtor dtor)
|
|
{
|
|
curl_hash *h;
|
|
|
|
h = (curl_hash *) malloc(sizeof(curl_hash));
|
|
if (NULL == h)
|
|
return NULL;
|
|
|
|
Curl_hash_init(h, slots, dtor);
|
|
|
|
return h;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ static int _hash_key_compare (char *, size_t, char *, size_t)
|
|
*/
|
|
static int
|
|
_hash_key_compare (char *key1, size_t key1_len, char *key2, size_t key2_len)
|
|
{
|
|
if (key1_len == key2_len &&
|
|
*key1 == *key2 &&
|
|
memcmp(key1, key2, key1_len) == 0) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ static int _mk_hash_element (curl_hash_element **, char *, size_t, const void *)
|
|
*/
|
|
static int
|
|
_mk_hash_element (curl_hash_element **e, char *key, size_t key_len, const void *p)
|
|
{
|
|
*e = (curl_hash_element *) malloc(sizeof(curl_hash_element));
|
|
(*e)->key = strdup(key);
|
|
(*e)->key_len = key_len;
|
|
(*e)->ptr = (void *) p;
|
|
return 0;
|
|
}
|
|
/* }}} */
|
|
|
|
#define find_slot(__h, __k, __k_len) (_hash_str(__k, __k_len) % (__h)->slots)
|
|
|
|
#define FETCH_LIST \
|
|
curl_llist *l = h->table[find_slot(h, key, key_len)]
|
|
|
|
|
|
/* {{{ int curl_hash_add (curl_hash *, char *, size_t, const void *)
|
|
*/
|
|
int
|
|
Curl_hash_add (curl_hash *h, char *key, size_t key_len, const void *p)
|
|
{
|
|
curl_hash_element *he;
|
|
curl_llist_element *le;
|
|
FETCH_LIST;
|
|
|
|
for (le = CURL_LLIST_HEAD(l);
|
|
le != NULL;
|
|
le = CURL_LLIST_NEXT(le)) {
|
|
he = (curl_hash_element *) CURL_LLIST_VALP(le);
|
|
if (_hash_key_compare(he->key, he->key_len, key, key_len)) {
|
|
h->dtor(he->ptr);
|
|
he->ptr = (void *) p;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (_mk_hash_element(&he, key, key_len, p) != 0)
|
|
return 0;
|
|
|
|
if (Curl_llist_insert_next(l, CURL_LLIST_TAIL(l), he)) {
|
|
++h->size;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ int curl_hash_delete (curl_hash *, char *, size_t)
|
|
*/
|
|
int
|
|
Curl_hash_delete(curl_hash *h, char *key, size_t key_len)
|
|
{
|
|
curl_hash_element *he;
|
|
curl_llist_element *le;
|
|
FETCH_LIST;
|
|
|
|
for (le = CURL_LLIST_HEAD(l);
|
|
le != NULL;
|
|
le = CURL_LLIST_NEXT(le)) {
|
|
he = CURL_LLIST_VALP(le);
|
|
if (_hash_key_compare(he->key, he->key_len, key, key_len)) {
|
|
Curl_llist_remove(l, le, (void *) h);
|
|
--h->size;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ int curl_hash_pick (curl_hash *, char *, size_t, void **)
|
|
*/
|
|
void *
|
|
Curl_hash_pick(curl_hash *h, char *key, size_t key_len)
|
|
{
|
|
curl_llist_element *le;
|
|
curl_hash_element *he;
|
|
FETCH_LIST;
|
|
|
|
for (le = CURL_LLIST_HEAD(l);
|
|
le != NULL;
|
|
le = CURL_LLIST_NEXT(le)) {
|
|
he = CURL_LLIST_VALP(le);
|
|
if (_hash_key_compare(he->key, he->key_len, key, key_len)) {
|
|
return he->ptr;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ void curl_hash_apply (curl_hash *, void *, void (*)(void *, curl_hash_element *))
|
|
*/
|
|
void
|
|
Curl_hash_apply(curl_hash *h, void *user,
|
|
void (*cb)(void *user, void *ptr))
|
|
{
|
|
curl_llist_element *le;
|
|
int i;
|
|
|
|
for (i = 0; i < h->slots; ++i) {
|
|
for (le = CURL_LLIST_HEAD(h->table[i]);
|
|
le != NULL;
|
|
le = CURL_LLIST_NEXT(le)) {
|
|
curl_hash_element *el = CURL_LLIST_VALP(le);
|
|
cb(user, el->ptr);
|
|
}
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ void curl_hash_clean (curl_hash *)
|
|
*/
|
|
void
|
|
Curl_hash_clean(curl_hash *h)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < h->slots; ++i) {
|
|
Curl_llist_destroy(h->table[i], (void *) h);
|
|
}
|
|
|
|
free(h->table);
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ void curl_hash_clean_with_criterium (curl_hash *, void *,
|
|
int (*)(void *, void *))
|
|
*/
|
|
void
|
|
Curl_hash_clean_with_criterium(curl_hash *h, void *user,
|
|
int (*comp)(void *, void *))
|
|
{
|
|
curl_llist_element *le;
|
|
curl_llist_element *lnext;
|
|
int i;
|
|
|
|
for (i = 0; i < h->slots; ++i) {
|
|
le = CURL_LLIST_HEAD(h->table[i]);
|
|
while(le != NULL)
|
|
if (comp(user, ((curl_hash_element *) CURL_LLIST_VALP(le))->ptr)) {
|
|
lnext = CURL_LLIST_NEXT(le);
|
|
Curl_llist_remove(h->table[i], le, (void *) h);
|
|
--h->size;
|
|
le = lnext;
|
|
}
|
|
else
|
|
le = CURL_LLIST_NEXT(le);
|
|
}
|
|
}
|
|
|
|
/* {{{ int curl_hash_count (curl_hash *)
|
|
*/
|
|
int
|
|
Curl_hash_count(curl_hash *h)
|
|
{
|
|
return h->size;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ void curl_hash_destroy (curl_hash *)
|
|
*/
|
|
void
|
|
Curl_hash_destroy(curl_hash *h)
|
|
{
|
|
if (!h)
|
|
return;
|
|
|
|
Curl_hash_clean(h);
|
|
free(h);
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* local variables:
|
|
* eval: (load-file "../curl-mode.el")
|
|
* end:
|
|
* vim600: fdm=marker
|
|
* vim: et sw=2 ts=2 sts=2 tw=78
|
|
*/
|