485aef42c9
in two places. While here don't bother returning anything from Lst_Replace - nobody ever checks the return code. Suggested by: jmallet
178 lines
5.5 KiB
C
178 lines
5.5 KiB
C
/*-
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef lst_h_38f3ead1
|
|
#define lst_h_38f3ead1
|
|
|
|
/*-
|
|
* lst.h --
|
|
* Header for using the list library
|
|
*/
|
|
|
|
#include "util.h"
|
|
|
|
/*
|
|
* Structure of a list node.
|
|
*/
|
|
struct LstNode {
|
|
struct LstNode *prevPtr; /* previous element in list */
|
|
struct LstNode *nextPtr; /* next in list */
|
|
void *datum; /* datum associated with this element */
|
|
};
|
|
typedef struct LstNode LstNode;
|
|
|
|
/*
|
|
* The list itself
|
|
*/
|
|
struct Lst {
|
|
LstNode *firstPtr; /* first node in list */
|
|
LstNode *lastPtr; /* last node in list */
|
|
};
|
|
typedef struct Lst Lst;
|
|
|
|
typedef void *DuplicateProc(void *);
|
|
typedef void FreeProc(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 ((FreeProc *)NULL)
|
|
#define NOCOPY ((DuplicateProc *)NULL)
|
|
|
|
#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 */
|
|
#define Lst_Init(LST) do { \
|
|
(LST)->firstPtr = NULL; \
|
|
(LST)->lastPtr = NULL; \
|
|
} while (0)
|
|
#define Lst_Initializer(NAME) { NULL, NULL }
|
|
|
|
/* Duplicate an existing list */
|
|
void Lst_Duplicate(Lst *, Lst *, DuplicateProc *);
|
|
|
|
/* Destroy an old one */
|
|
void Lst_Destroy(Lst *, FreeProc *);
|
|
|
|
/*
|
|
* Functions to modify a list
|
|
*/
|
|
/* Insert an element before another */
|
|
void Lst_Insert(Lst *, LstNode *, void *);
|
|
/* Insert an element after another */
|
|
void Lst_Append(Lst *, LstNode *, void *);
|
|
/* Place an element at the front of a lst. */
|
|
#define Lst_AtFront(LST, D) (Lst_Insert((LST), Lst_First(LST), (D)))
|
|
/* Place an element at the end of a lst. */
|
|
#define Lst_AtEnd(LST, D) (Lst_Append((LST), Lst_Last(LST), (D)))
|
|
/* Remove an element */
|
|
void Lst_Remove(Lst *, LstNode *);
|
|
/* Replace a node with a new value */
|
|
#define Lst_Replace(NODE, D) ((void)((NODE)->datum = (D)))
|
|
/* Concatenate two lists */
|
|
void Lst_Concat(Lst *, Lst *, int);
|
|
|
|
/*
|
|
* Node-specific functions
|
|
*/
|
|
/* Return first element in list */
|
|
#define Lst_First(LST) ((Lst_Valid(LST) && !Lst_IsEmpty(LST)) \
|
|
? (LST)->firstPtr : NULL)
|
|
/* Return last element in list */
|
|
#define Lst_Last(LST) ((Lst_Valid(LST) && !Lst_IsEmpty(LST)) \
|
|
? (LST)->lastPtr : NULL)
|
|
/* Return successor to given element */
|
|
#define Lst_Succ(NODE) (((NODE) == NULL) ? NULL : (NODE)->nextPtr)
|
|
#define LST_NEXT(NODE) ((NODE)->nextPtr)
|
|
/* Get datum from LstNode */
|
|
#define Lst_Datum(NODE) ((NODE)->datum)
|
|
|
|
/*
|
|
* Functions for entire lists
|
|
*/
|
|
|
|
/*
|
|
* See if the given datum is on the list. Returns the LstNode containing
|
|
* the datum
|
|
*/
|
|
LstNode *Lst_Member(Lst *, void *);
|
|
|
|
/* Loop through a list. Note, that you may not delete the list element. */
|
|
#define LST_FOREACH(PTR, LST) \
|
|
for ((PTR) = (LST)->firstPtr; (PTR) != NULL; (PTR) = (PTR)->nextPtr)
|
|
|
|
/*
|
|
* for using the list as a queue
|
|
*/
|
|
/* Place an element at tail of queue */
|
|
#define Lst_EnQueue(LST, D) (Lst_Valid(LST) \
|
|
? Lst_Append((LST), Lst_Last(LST), (D)) \
|
|
: (void)0)
|
|
/* Remove an element from head of queue */
|
|
void *Lst_DeQueue(Lst *);
|
|
|
|
/*
|
|
* LstValid (L) --
|
|
* Return TRUE if the list L is valid
|
|
*/
|
|
#define Lst_Valid(L) (((L) == NULL) ? FALSE : TRUE)
|
|
|
|
/*
|
|
* LstNodeValid (LN, L) --
|
|
* Return TRUE if the LstNode LN is valid with respect to L
|
|
*/
|
|
#define Lst_NodeValid(LN, L) (((LN) == NULL) ? FALSE : TRUE)
|
|
|
|
/*
|
|
* Lst_IsEmpty(L) --
|
|
* TRUE if the list L is empty.
|
|
*/
|
|
#define Lst_IsEmpty(L) (!Lst_Valid(L) || (L)->firstPtr == NULL)
|
|
|
|
#endif /* lst_h_38f3ead1 */
|