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https://git.code.sf.net/p/quake/quakeforge
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115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/*
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llist.h
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Linked list functions
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Copyright (C) 2003 Brian Koropoff
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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.
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See the GNU General Public License for more details.
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef _LLIST_H
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#define _LLIST_H
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#include "QF/qtypes.h"
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/** \defgroup llist Linked lists
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\ingroup utils
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*/
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//@{
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typedef struct llist_node_s {
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struct llist_s *parent; ///< The list owning this node.
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struct llist_node_s *prev; ///< The previous node in the list, or null.
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struct llist_node_s *next; ///< The flowing node in the list, or null.
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void *data; ///< The actual list item.
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} llist_node_t;
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typedef struct llist_s {
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struct llist_node_s *start; ///< The first node in the list, or null.
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struct llist_node_s *end; ///< The last node in the list, or null.
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struct llist_node_s *iter;
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/// Function called when deleting a list item.
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/// \param element The item being deleted.
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/// \param userdata Pointer to user data supplied to llist_new().
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void (*freedata)(void *element, void *userdata);
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qboolean (*cmpdata)(const void *element, const void *comparison,
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void *userdata);
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void *userdata;
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} llist_t;
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typedef qboolean (*llist_iterator_t)(void *element, llist_node_t *node);
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#define LLIST_ICAST(x) (llist_iterator_t)(x)
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#define LLIST_DATA(node, type) ((type *)((node)->data))
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/** Create a new, empty, linked list.
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\param freedata Function to call when deleting a list item.
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\param cmpdata Function to call to compare two list items. It must
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return true when the items are the same and false when
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they differ.
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\param userdata User data pointer. Set to whatever you want, it will be
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passed to the \a freedata and \a cmpdata functions as
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their final parameter.
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\return Pointer to the list's control structure, which is to be
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passed to the other functions accessing the list.
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*/
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llist_t *llist_new (void (*freedata)(void *element, void *userdata),
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qboolean (*cmpdata)(const void *element,
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const void *comparison,
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void *userdata),
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void *userdata);
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/** Empty a linked list.
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All of the items in the list will be deleted via the list's \a freedata
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function and the list will become empty.
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\param list Pointer to the list's control structure created by
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llist_new(). May be null, in which case no operation is
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performed.
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*/
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void llist_flush (llist_t *list);
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/** Delete a linked list.
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All of the items in the list will be deleted via the list's \a freedata
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function and the list will be destroyed. Do not attempt to use the list
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pointer after destroying the list.
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\param list Pointer to the list's control structure created by
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llist_new(). May be null, in which case no operation is
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performed.
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*/
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void llist_delete (llist_t *list);
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llist_node_t *llist_append (llist_t *list, void *element);
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llist_node_t *llist_prefix (llist_t *list, void *element);
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llist_node_t *llist_getnode (llist_t *list, void *element) __attribute__((pure));
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llist_node_t *llist_insertafter (llist_node_t *ref, void *element);
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llist_node_t *llist_insertbefore (llist_node_t *ref, void *element);
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void *llist_remove (llist_node_t *ref);
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unsigned int llist_size (llist_t *llist) __attribute__((pure));
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void llist_iterate (llist_t *list, llist_iterator_t iterate);
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void *llist_find (llist_t *list, void *comparison);
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llist_node_t *llist_findnode (llist_t *list, void *comparison);
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void *llist_createarray (llist_t *list, size_t esize);
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//@}
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#endif
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