1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) many different people. If you wrote this, please
6 * acknowledge your work.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #define HASH_SIZE 311 /* Should be prime */
30 #define hash_inode(i) ((i) % HASH_SIZE)
32 static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
35 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
36 * `ino_dev_hashtable', else return 0
38 * If NAME is a non-NULL pointer to a character pointer, and there is
39 * a match, then set *NAME to the value of the name slot in that
42 int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
44 ino_dev_hashtable_bucket_t *bucket;
46 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
47 while (bucket != NULL) {
48 if ((bucket->ino == statbuf->st_ino) &&
49 (bucket->dev == statbuf->st_dev))
51 if (name) *name = bucket->name;
54 bucket = bucket->next;
59 /* Add statbuf to statbuf hash table */
60 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
64 ino_dev_hashtable_bucket_t *bucket;
66 i = hash_inode(statbuf->st_ino);
67 s = name ? strlen(name) : 0;
68 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
69 bucket->ino = statbuf->st_ino;
70 bucket->dev = statbuf->st_dev;
72 strcpy(bucket->name, name);
74 bucket->name[0] = '\0';
75 bucket->next = ino_dev_hashtable[i];
76 ino_dev_hashtable[i] = bucket;
79 /* Clear statbuf hash table */
80 void reset_ino_dev_hashtable(void)
83 ino_dev_hashtable_bucket_t *bucket;
85 for (i = 0; i < HASH_SIZE; i++) {
86 while (ino_dev_hashtable[i] != NULL) {
87 bucket = ino_dev_hashtable[i]->next;
88 free(ino_dev_hashtable[i]);
89 ino_dev_hashtable[i] = bucket;