-/*!
- * \file
- * Copyright (C) 2003,2004 Develer S.r.l. (http://www.develer.com/)
- * Copyright (C) 2001 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See devlib/README for information.
- *
- * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
- *
- * \brief General pourpose double-linked lists
- */
-
-/*
- * $Log$
- * Revision 1.4 2004/07/18 22:12:53 bernie
- * Fix warnings with GCC 3.3.2.
- *
- * Revision 1.3 2004/07/18 22:01:43 bernie
- * REMHEAD(), REMTAIL(): Move to list.h as inline functions.
- *
- * Revision 1.2 2004/06/03 11:27:09 bernie
- * Add dual-license information.
- *
- * Revision 1.1 2004/05/23 15:43:16 bernie
- * Import mware modules.
- *
- */
-#ifndef MWARE_LIST_H
-#define MWARE_LIST_H
-
-typedef struct _Node
-{
- struct _Node *succ;
- struct _Node *pred;
-} Node;
-
-typedef struct _List
-{
- Node *head;
- Node *null;
- Node *tail;
-} List;
-
-
-/*! Template for a list of \a T structures */
-#define DECLARE_LIST(T) \
- struct { T *head; T *null; T *tail; }
-
-/*! Template for a node in a list of \a T structures */
-#define DECLARE_NODE(T) \
- struct { T *succ; T *pred; }
-
-/*! Template for a node in a list of \a T structures */
-#define DECLARE_NODE_ANON(T) \
- T *succ; T *pred;
-
-/*!
- * Iterate over all nodes in a list. This statement defines a for cicle
- * accepting the following parameters:
- * \param n node pointer to be used in each iteration
- * \param l pointer to list
- */
-#define FOREACHNODE(n,l) \
- for( \
- (n) = (typeof(n))((l)->head); \
- ((Node *)(n))->succ; \
- (n) = (typeof(n))(((Node *)(n))->succ) \
- )
-
-/*! Initialize a list */
-#define INITLIST(l) \
- do { \
- (l)->head = (Node *)(&(l)->null); \
- (l)->null = NULL; \
- (l)->tail = (Node *)(&(l)->head); \
- } while (0)
-
-/*! Add node to list head */
-#define ADDHEAD(l,n) \
- do { \
- (n)->succ = (l)->head; \
- (n)->pred = (Node *)&(l)->head; \
- (n)->succ->pred = (n); \
- (l)->head = (n); \
- } while (0)
-
-/*! Add node to list tail */
-#define ADDTAIL(l,n) \
- do { \
- (n)->succ = (Node *)(&(l)->null); \
- (n)->pred = (l)->tail; \
- (n)->pred->succ = (n); \
- (l)->tail = (n); \
- } while (0)
-
-/*!
- * Insert node \a n before node \a ln
- * Note: you can't pass in a list header as \a ln, but
- * it is safe to pass list-\>head of an empty list.
- */
-#define INSERTBEFORE(n,ln) \
- do { \
- (n)->succ = (ln); \
- (n)->pred = (ln)->pred; \
- (ln)->pred->succ = (n); \
- (ln)->pred = (n); \
- } while (0)
-
-/*! Remove \a n from whatever list it is in */
-#define REMOVE(n) \
- do { \
- (n)->pred->succ = (n)->succ; \
- (n)->succ->pred = (n)->pred; \
- } while (0)
-
-/*! Tell whether a list is empty */
-#define ISLISTEMPTY(l) ( (l)->head == (Node *)(&(l)->null) )
-
-/*!
- * \name Unlink a node from the head of the list \a l.
- * \return Pointer to node, or NULL if the list was empty.
- */
-INLINE Node *REMHEAD(List *l);
-INLINE Node *REMHEAD(List *l)
-{
- Node *n;
-
- if (ISLISTEMPTY(l))
- return (Node *)0;
-
- n = l->head;
- l->head = n->succ;
- n->succ->pred = (Node *)l;
- return n;
-}
-
-/*!
- * \name Unlink a node from the tail of the list \a l.
- * \return Pointer to node, or NULL if the list was empty.
- */
-INLINE Node *REMTAIL(List *l);
-INLINE Node *REMTAIL(List *l)
-{
- Node *n;
-
- if (ISLISTEMPTY(l))
- return (Node *)0;
-
- n = l->tail;
- l->tail = n->pred;
- n->pred->succ = (Node *)&l->null;
- return n;
-}
-
-#endif /* MWARE_LIST_H */