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/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)lst.h 8.2 (Berkeley) 4/28/95
* $FreeBSD$
*/
/*-
* lst.h --
* Header for using the list library
*/
#ifndef _LST_H_
#define _LST_H_
#include <sys/param.h>
#include <stdlib.h>
#include "sprite.h"
/*
* basic typedef. This is what the Lst_ functions handle
*/
typedef struct Lst *Lst;
typedef struct LstNode *LstNode;
/*
* NOFREE can be used as the freeProc to Lst_Destroy when the elements are
* not to be freed.
* NOCOPY performs similarly when given as the copyProc to Lst_Duplicate.
*/
#define NOFREE ((void (*)(void *)) 0)
#define NOCOPY ((void * (*)(void *)) 0)
#define LST_CONCNEW 0 /* create new LstNode's when using Lst_Concat */
#define LST_CONCLINK 1 /* relink LstNode's when using Lst_Concat */
/*
* Creation/destruction functions
*/
/* Create a new list */
Lst Lst_Init(Boolean);
/* Duplicate an existing list */
Lst Lst_Duplicate(Lst, void * (*)(void *));
/* Destroy an old one */
void Lst_Destroy(Lst, void (*)(void *));
/* True if list is empty */
Boolean Lst_IsEmpty(Lst);
/*
* Functions to modify a list
*/
/* Insert an element before another */
ReturnStatus Lst_Insert(Lst, LstNode, void *);
/* Insert an element after another */
ReturnStatus Lst_Append(Lst, LstNode, void *);
/* Place an element at the front of a lst. */
ReturnStatus Lst_AtFront(Lst, void *);
/* Place an element at the end of a lst. */
ReturnStatus Lst_AtEnd(Lst, void *);
/* Remove an element */
ReturnStatus Lst_Remove(Lst, LstNode);
/* Replace a node with a new value */
ReturnStatus Lst_Replace(LstNode, void *);
/* Concatenate two lists */
ReturnStatus Lst_Concat(Lst, Lst, int);
/*
* Node-specific functions
*/
/* Return first element in list */
LstNode Lst_First(Lst);
/* Return last element in list */
LstNode Lst_Last(Lst);
/* Return successor to given element */
LstNode Lst_Succ(LstNode);
/* Get datum from LstNode */
void * Lst_Datum(LstNode);
/*
* Functions for entire lists
*/
/* Find an element in a list */
LstNode Lst_Find(Lst, void *, int (*)(void *, void *));
/* Find an element starting from somewhere */
LstNode Lst_FindFrom(Lst, LstNode, void *, int (*cProc)(void *, void *));
/*
* See if the given datum is on the list. Returns the LstNode containing
* the datum
*/
LstNode Lst_Member(Lst, void *);
/* Apply a function to all elements of a lst */
void Lst_ForEach(Lst, int (*)(void *, void *), void *);
/*
* Apply a function to all elements of a lst starting from a certain point.
* If the list is circular, the application will wrap around to the
* beginning of the list again.
*/
void Lst_ForEachFrom(Lst, LstNode, int (*)(void *, void *), void *);
/*
* these functions are for dealing with a list as a table, of sorts.
* An idea of the "current element" is kept and used by all the functions
* between Lst_Open() and Lst_Close().
*/
/* Open the list */
ReturnStatus Lst_Open(Lst);
/* Next element please */
LstNode Lst_Next(Lst);
/* Done yet? */
Boolean Lst_IsAtEnd(Lst);
/* Finish table access */
void Lst_Close(Lst);
/*
* for using the list as a queue
*/
/* Place an element at tail of queue */
ReturnStatus Lst_EnQueue(Lst, void *);
/* Remove an element from head of queue */
void * Lst_DeQueue(Lst);
#endif /* _LST_H_ */
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