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#ifndef _LST_H_
#define _LST_H_
/* $OpenBSD: lst.h,v 1.33 2021/03/04 09:45:31 espie Exp $ */
/* $NetBSD: lst.h,v 1.7 1996/11/06 17:59:12 christos Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* 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. 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.
*
* from: @(#)lst.h 8.1 (Berkeley) 6/6/93
*/
/*-
* lst.h --
* Header for using the list library
*/
/* These data structures are PRIVATE !!!
* Here for efficiency, so that some functions can be recoded as inlines,
* and so that lst headers don't need dynamic allocation most of the time. */
struct ListNode_ {
struct ListNode_ *prevPtr; /* previous element in list */
struct ListNode_ *nextPtr; /* next in list */
void *datum; /* datum associated with this element */
};
#ifndef LIST_TYPE
#include "lst_t.h"
#endif
typedef void (*SimpleProc)(void *);
typedef bool (*FindProc)(void *, void *);
typedef bool (*FindProcConst)(void *, const void *);
typedef void (*ForEachProc)(void *, void *);
typedef void *(*DuplicateProc)(void *);
/*
* 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 ((SimpleProc) 0)
#define NOCOPY ((DuplicateProc) 0)
/*
* Creation/destruction functions
*/
/* Create a new list */
#define Lst_Init(l) (l)->firstPtr = (l)->lastPtr = NULL
/* Static lists are already okay */
#define Static_Lst_Init(l)
/* Duplicate an existing list */
extern Lst Lst_Clone(Lst, Lst, DuplicateProc);
/* XXX: Lst_Destroy only destroys the list contents, which is appropriate
* as most use-cases are temporary lists.
* In case of a permanent list, Lst_Init must also be called !
*/
/* Destroy an old one */
extern void Lst_Destroy(LIST *, SimpleProc);
/* True if list is empty */
#define Lst_IsEmpty(l) ((l)->firstPtr == NULL)
/*
* Functions to modify a list
*/
/* Insert an element before another */
extern void Lst_Insert(Lst, LstNode, void *);
extern void Lst_AtFront(Lst, void *);
/* Insert an element after another */
extern void Lst_Append(Lst, LstNode, void *);
extern void Lst_AtEnd(Lst, void *);
/* Remove an element */
extern void Lst_Remove(Lst, LstNode);
/* Replace a node with a new value */
extern void Lst_Replace(LstNode, void *);
/* Concatenate two lists, destructive. */
extern void Lst_ConcatDestroy(Lst, Lst);
/* Concatenate two lists, non-destructive. */
extern void Lst_Concat(Lst, Lst);
/* requeue element already in list at front of list */
extern void Lst_Requeue(Lst, LstNode);
/*
* Node-specific functions
*/
/* Return first element in list */
/* Return last element in list */
/* Return successor to given element */
extern LstNode Lst_Succ(LstNode);
/*
* Functions for entire lists
*/
/* Find an element starting from somewhere */
extern LstNode Lst_FindFrom(LstNode, FindProc, void *);
/*
* See if the given datum is on the list. Returns the LstNode containing
* the datum
*/
extern LstNode Lst_Member(Lst, void *);
/* Apply a function to elements of a lst starting from a certain point. */
extern void Lst_ForEachFrom(LstNode, ForEachProc, void *);
extern void Lst_Every(Lst, SimpleProc);
extern bool Lst_AddNew(Lst, void *);
/*
* for using the list as a queue
*/
/* Place an element at tail of queue */
#define Lst_EnQueue Lst_AtEnd
#define Lst_QueueNew Lst_AddNew
/*
* for using the list as a stack
*/
#define Lst_Push Lst_AtFront
#define Lst_Pop Lst_DeQueue
/* Remove an element from head of queue */
extern void * Lst_DeQueue(Lst);
#define Lst_Datum(ln) ((ln)->datum)
#define Lst_First(l) ((l)->firstPtr)
#define Lst_Last(l) ((l)->lastPtr)
#define Lst_ForEach(l, proc, d) Lst_ForEachFrom(Lst_First(l), proc, d)
#define Lst_Find(l, cProc, d) Lst_FindFrom(Lst_First(l), cProc, d)
#define Lst_Adv(ln) ((ln)->nextPtr)
#define Lst_Rev(ln) ((ln)->prevPtr)
/* Inlines are preferable to macros here because of the type checking. */
#ifdef HAS_INLINES
static INLINE LstNode
Lst_FindConst(Lst l, FindProcConst cProc, const void *d)
{
return Lst_FindFrom(Lst_First(l), (FindProc)cProc, (void *)d);
}
static INLINE LstNode
Lst_FindFromConst(LstNode ln, FindProcConst cProc, const void *d)
{
return Lst_FindFrom(ln, (FindProc)cProc, (void *)d);
}
#else
#define Lst_FindConst(l, cProc, d) \
Lst_FindFrom(Lst_First(l), (FindProc)cProc, (void *)d)
#define Lst_FindFromConst(ln, cProc, d) \
Lst_FindFrom(ln, (FindProc)cProc, (void *)d)
#endif
#endif /* _LST_H_ */
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