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111 lines
3.1 KiB
111 lines
3.1 KiB
/*
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* Copyright (C) 2015 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2015 Sourcefire, Inc.
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*
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* Authors: Mickey Sola
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __ONAS_HASH_H
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#define __ONAS_HASH_H
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#define ONAS_FANWATCH 0x1
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#define ONAS_INWATCH 0x2
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#define ONAS_STOPWATCH 0x3
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#define ONAS_DEFAULT_HT_SIZE 1 << 18
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struct onas_element {
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const char* key;
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size_t klen;
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struct onas_hnode *data;
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struct onas_element *next;
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struct onas_element *prev;
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};
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struct onas_bucket {
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uint32_t size;
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struct onas_element *head;
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struct onas_element *tail;
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};
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struct onas_ht {
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struct onas_bucket **htable;
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/* Must be a sufficiently high power of two--will not grow. */
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uint32_t size;
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uint32_t nbckts;
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};
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/* Directory node struct for lists */
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struct onas_lnode {
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/* List stuffs */
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char *dirname;
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struct onas_lnode *next;
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struct onas_lnode *prev;
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};
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/* Directory node struct for hash tables */
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struct onas_hnode {
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/* Path info */
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int pathlen;
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char *pathname;
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/* Parent info */
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int prnt_pathlen;
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char *prnt_pathname;
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/* Child head and tail are empty sentinels */
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struct onas_lnode *childhead;
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struct onas_lnode *childtail;
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/* Inotify watch descriptor */
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int wd;
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/* Watched stuffs */
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uint32_t watched;
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};
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void onas_free_ht(struct onas_ht *ht);
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int onas_ht_init(struct onas_ht **ht, uint32_t table_size);
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int onas_ht_insert(struct onas_ht *ht, struct onas_element *elem);
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int onas_ht_remove(struct onas_ht *ht, const char *key, size_t klen, struct onas_element **elem);
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int onas_ht_get(struct onas_ht *ht, const char *key, size_t klen, struct onas_element **elem);
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int onas_ht_rm_hierarchy(struct onas_ht *ht, const char *pathname, size_t len, int level);
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int onas_ht_add_hierarchy(struct onas_ht *ht, const char *pathname);
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int onas_ht_add_child(struct onas_ht *ht, const char *prntpath, size_t prntlen, const char *childpath, size_t childlen);
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int onas_ht_rm_child(struct onas_ht *ht, const char *prntpath, size_t prntlen, const char *childpath, size_t childlen);
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void onas_free_element(struct onas_element *elem);
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struct onas_element *onas_element_init(struct onas_hnode *value, const char *key, size_t klen);
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void onas_free_hashnode(struct onas_hnode *hnode);
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void onas_free_listnode(struct onas_lnode *lnode);
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int onas_add_listnode(struct onas_lnode *tail, struct onas_lnode *node);
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int onas_rm_listnode(struct onas_lnode *head, const char *dirname);
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void onas_free_dirlist(struct onas_lnode *head);
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#endif
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