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/** |
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* dlink.h: Data structures and macros for manipulating linked lists. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in COPYING. |
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* |
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* |
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* Portions of this file were derived from sources bearing the following license: |
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* Copyright © 2005 William Pitcock, et al. |
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* Rights to this code are as documented in doc/pod/license.pod. |
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* |
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* $Id: dlink.h,v 1.4 2007-09-16 18:54:42 pippijn Exp $ |
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*/ |
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|
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#ifndef NODE_H |
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#define NODE_H |
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|
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#include <util/memory.h> |
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|
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/* macros for linked lists */ |
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#define LIST_FOREACH(n, head) for (n = (head); n; n = n->next) |
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#define LIST_FOREACH_NEXT(n, head) for (n = (head); n->next; n = n->next) |
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#define LIST_FOREACH_PREV(n, tail) for (n = (tail); n; n = n->prev) |
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|
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#define LIST_LENGTH(list) (list)->count |
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|
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#define LIST_FOREACH_SAFE(n, tn, head) for (n = (head), tn = n ? n->next : NULL; n != NULL; n = tn, tn = n ? n->next : NULL) |
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|
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/* list node struct */ |
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struct node_t : zero_initialised |
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{ |
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node_t *next; |
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node_t *prev; |
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void *data; /* pointer to real structure */ |
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}; |
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|
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/* node list struct */ |
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struct list_t : zero_initialised |
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{ |
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node_t *head; |
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node_t *tail; |
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unsigned int count; /* how many entries in the list */ |
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|
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list_t () |
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: head (0), tail (0), count (0) |
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{ |
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} |
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}; |
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|
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E node_t *node_create (void); |
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E void node_free (node_t *n); |
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E void node_add (void *data, node_t *n, list_t *l); |
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E void node_add_head (void *data, node_t *n, list_t *l); |
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E void node_add_before (void *data, node_t *n, list_t *l, node_t *before); |
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E void node_del (node_t *n, list_t *l); |
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E node_t *node_find (void *data, list_t *l); |
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E void node_move (node_t *m, list_t *oldlist, list_t *newlist); |
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|
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#endif |
