diff options
author | Jelmer Vernooij <jelmer@samba.org> | 2006-08-30 11:29:34 +0000 |
---|---|---|
committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 14:16:54 -0500 |
commit | 0329d755a7611ba3897fc1ee9bdce410cc33d7f8 (patch) | |
tree | 93a738001fad5d9c2c9cc9efbcba00a4ad0b9450 /source4/lib/util/dlinklist.h | |
parent | 6c68f1ae9ec1ef6afbde634cd0ea591860916524 (diff) | |
download | samba-0329d755a7611ba3897fc1ee9bdce410cc33d7f8.tar.gz samba-0329d755a7611ba3897fc1ee9bdce410cc33d7f8.tar.bz2 samba-0329d755a7611ba3897fc1ee9bdce410cc33d7f8.zip |
r17930: Merge noinclude branch:
* Move dlinklist.h, smb.h to subsystem-specific directories
* Clean up ads.h and move what is left of it to dsdb/
(only place where it's used)
(This used to be commit f7afa1cb77f3cfa7020b57de12e6003db7cfcc42)
Diffstat (limited to 'source4/lib/util/dlinklist.h')
-rw-r--r-- | source4/lib/util/dlinklist.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/source4/lib/util/dlinklist.h b/source4/lib/util/dlinklist.h new file mode 100644 index 0000000000..527b211cd3 --- /dev/null +++ b/source4/lib/util/dlinklist.h @@ -0,0 +1,109 @@ +/* + Unix SMB/CIFS implementation. + some simple double linked list macros + Copyright (C) Andrew Tridgell 1998 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* To use these macros you must have a structure containing a next and + prev pointer */ + + +/* hook into the front of the list */ +#define DLIST_ADD(list, p) \ +do { \ + if (!(list)) { \ + (list) = (p); \ + (p)->next = (p)->prev = NULL; \ + } else { \ + (list)->prev = (p); \ + (p)->next = (list); \ + (p)->prev = NULL; \ + (list) = (p); \ + }\ +} while (0) + +/* remove an element from a list - element doesn't have to be in list. */ +#define DLIST_REMOVE(list, p) \ +do { \ + if ((p) == (list)) { \ + (list) = (p)->next; \ + if (list) (list)->prev = NULL; \ + } else { \ + if ((p)->prev) (p)->prev->next = (p)->next; \ + if ((p)->next) (p)->next->prev = (p)->prev; \ + } \ + if ((p) != (list)) (p)->next = (p)->prev = NULL; \ +} while (0) + +/* promote an element to the top of the list */ +#define DLIST_PROMOTE(list, p) \ +do { \ + DLIST_REMOVE(list, p); \ + DLIST_ADD(list, p); \ +} while (0) + +/* hook into the end of the list - needs a tmp pointer */ +#define DLIST_ADD_END(list, p, type) \ +do { \ + if (!(list)) { \ + (list) = (p); \ + (p)->next = (p)->prev = NULL; \ + } else { \ + type tmp; \ + for (tmp = (list); tmp->next; tmp = tmp->next) ; \ + tmp->next = (p); \ + (p)->next = NULL; \ + (p)->prev = tmp; \ + } \ +} while (0) + +/* insert 'p' after the given element 'el' in a list. If el is NULL then + this is the same as a DLIST_ADD() */ +#define DLIST_ADD_AFTER(list, p, el) \ +do { \ + if (!(list) || !(el)) { \ + DLIST_ADD(list, p); \ + } else { \ + p->prev = el; \ + p->next = el->next; \ + el->next = p; \ + if (p->next) p->next->prev = p; \ + }\ +} while (0) + +/* demote an element to the end of the list, needs a tmp pointer */ +#define DLIST_DEMOTE(list, p, tmp) \ +do { \ + DLIST_REMOVE(list, p); \ + DLIST_ADD_END(list, p, tmp); \ +} while (0) + +/* concatenate two lists - putting all elements of the 2nd list at the + end of the first list */ +#define DLIST_CONCATENATE(list1, list2, type) \ +do { \ + if (!(list1)) { \ + (list1) = (list2); \ + } else { \ + type tmp; \ + for (tmp = (list1); tmp->next; tmp = tmp->next) ; \ + tmp->next = (list2); \ + if (list2) { \ + (list2)->prev = tmp; \ + } \ + } \ +} while (0) |