xlist.h
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上传日期:2020-07-06
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- /*****************************************************************************
- * xlist.h : a simple doubly linked list in C (header file)
- *****************************************************************************
- * Copyright (C) 2003-2004 Commonwealth Scientific and Industrial Research
- * Organisation (CSIRO) Australia
- * Copyright (C) 2000-2004 the VideoLAN team
- *
- * $Id: 7bb94dd3d0c18cff5b2b8d3070195de0914392a3 $
- *
- * Authors: Conrad Parker <Conrad.Parker@csiro.au>
- * Andre Pang <Andre.Pang@csiro.au>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifndef __XLIST__
- #define __XLIST__
- /**
- * A doubly linked list
- */
- typedef struct _XList XList;
- struct _XList {
- XList * prev;
- XList * next;
- void * data;
- };
- /**
- * Signature of a cloning function.
- */
- typedef void * (*XCloneFunc) (void * data);
- /**
- * Signature of a freeing function.
- */
- typedef void * (*XFreeFunc) (void * data);
- /** Create a new list
- * return a new list
- */
- XList * xlist_new (void);
- /**
- * Clone a list using the default clone function
- * param list the list to clone
- * returns a newly cloned list
- */
- XList * xlist_clone (XList * list);
- /**
- * Clone a list using a custom clone function
- * param list the list to clone
- * param clone the function to use to clone a list item
- * returns a newly cloned list
- */
- XList * xlist_clone_with (XList * list, XCloneFunc clone);
- /**
- * Return the tail element of a list
- * param list the list
- * returns the tail element
- */
- XList * xlist_tail (XList * list);
- /**
- * Prepend a new node to a list containing given data
- * param list the list
- * param data the data element of the newly created node
- * returns the new list head
- */
- XList * xlist_prepend (XList * list, void * data);
- /**
- * Append a new node to a list containing given data
- * param list the list
- * param data the data element of the newly created node
- * returns the head of the list
- */
- XList * xlist_append (XList * list, void * data);
- /**
- * Add a new node containing given data before a given node
- * param list the list
- * param data the data element of the newly created node
- * param node the node before which to add the newly created node
- * returns the head of the list (which may have changed)
- */
- XList * xlist_add_before (XList * list, void * data, XList * node);
- /**
- * Add a new node containing given data after a given node
- * param list the list
- * param data the data element of the newly created node
- * param node the node after which to add the newly created node
- * returns the head of the list
- */
- XList * xlist_add_after (XList * list, void * data, XList * node);
- /**
- * Find the first node containing given data in a list
- * param list the list
- * param data the data element to find
- * returns the first node containing given data, or NULL if it is not found
- */
- XList * xlist_find (XList * list, void * data);
- /**
- * Remove a node from a list
- * param list the list
- * param node the node to remove
- * returns the head of the list (which may have changed)
- */
- XList * xlist_remove (XList * list, XList * node);
- /**
- * Query the number of items in a list
- * param list the list
- * returns the number of nodes in the list
- */
- int xlist_length (XList * list);
- /**
- * Query if a list is empty, ie. contains no items
- * param list the list
- * returns 1 if the list is empty, 0 otherwise
- */
- int xlist_is_empty (XList * list);
- /**
- * Query if the list is singleton, ie. contains exactly one item
- * param list the list
- * returns 1 if the list is singleton, 0 otherwise
- */
- int xlist_is_singleton (XList * list);
- /**
- * Free a list, using a given function to free each data element
- * param list the list
- * param free_func a function to free each data element
- * returns NULL on success
- */
- XList * xlist_free_with (XList * list, XFreeFunc free_func);
- /**
- * Free a list, using anx_free() to free each data element
- * param list the list
- * returns NULL on success
- */
- XList * xlist_free (XList * list);
- #endif /* __XLIST__ */