1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) many different people.
6 * If you wrote this, please acknowledge your work.
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
13 typedef struct ino_dev_hash_bucket_struct {
14 struct ino_dev_hash_bucket_struct *next;
18 } ino_dev_hashtable_bucket_t;
20 #define HASH_SIZE 311 /* Should be prime */
21 #define hash_inode(i) ((i) % HASH_SIZE)
23 /* array of [HASH_SIZE] elements */
24 static ino_dev_hashtable_bucket_t **ino_dev_hashtable;
27 * Return name if statbuf->st_ino && statbuf->st_dev are recorded in
28 * ino_dev_hashtable, else return NULL
30 char *is_in_ino_dev_hashtable(const struct stat *statbuf)
32 ino_dev_hashtable_bucket_t *bucket;
34 if (!ino_dev_hashtable)
37 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
38 while (bucket != NULL) {
39 if ((bucket->ino == statbuf->st_ino)
40 && (bucket->dev == statbuf->st_dev)
44 bucket = bucket->next;
49 /* Add statbuf to statbuf hash table */
50 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
53 ino_dev_hashtable_bucket_t *bucket;
55 i = hash_inode(statbuf->st_ino);
58 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + strlen(name));
59 bucket->ino = statbuf->st_ino;
60 bucket->dev = statbuf->st_dev;
61 strcpy(bucket->name, name);
63 if (!ino_dev_hashtable)
64 ino_dev_hashtable = xzalloc(HASH_SIZE * sizeof(*ino_dev_hashtable));
66 bucket->next = ino_dev_hashtable[i];
67 ino_dev_hashtable[i] = bucket;
70 #if ENABLE_FEATURE_CLEAN_UP
71 /* Clear statbuf hash table */
72 void reset_ino_dev_hashtable(void)
75 ino_dev_hashtable_bucket_t *bucket;
77 for (i = 0; ino_dev_hashtable && i < HASH_SIZE; i++) {
78 while (ino_dev_hashtable[i] != NULL) {
79 bucket = ino_dev_hashtable[i]->next;
80 free(ino_dev_hashtable[i]);
81 ino_dev_hashtable[i] = bucket;
84 free(ino_dev_hashtable);
85 ino_dev_hashtable = NULL;