557a8c511b
of Christos' version of make(1) and add Id's. Set straight by: Bruce Evans and Peter Wemm :)
113 lines
3.8 KiB
C
113 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 1988, 1989, 1990, 1993
|
|
* The Regents of the University of California. 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.
|
|
*
|
|
* from: @(#)lstInt.h 8.1 (Berkeley) 6/6/93
|
|
* $Id$
|
|
*/
|
|
|
|
/*-
|
|
* lstInt.h --
|
|
* Internals for the list library
|
|
*/
|
|
#ifndef _LSTINT_H_
|
|
#define _LSTINT_H_
|
|
|
|
#include "make.h"
|
|
#include "lst.h"
|
|
|
|
typedef struct ListNode {
|
|
struct ListNode *prevPtr; /* previous element in list */
|
|
struct ListNode *nextPtr; /* next in list */
|
|
short useCount:8, /* Count of functions using the node.
|
|
* node may not be deleted until count
|
|
* goes to 0 */
|
|
flags:8; /* Node status flags */
|
|
ClientData datum; /* datum associated with this element */
|
|
} *ListNode;
|
|
/*
|
|
* Flags required for synchronization
|
|
*/
|
|
#define LN_DELETED 0x0001 /* List node should be removed when done */
|
|
|
|
#define NilListNode ((ListNode)-1)
|
|
|
|
typedef enum {
|
|
Head, Middle, Tail, Unknown
|
|
} Where;
|
|
|
|
typedef struct {
|
|
ListNode firstPtr; /* first node in list */
|
|
ListNode lastPtr; /* last node in list */
|
|
Boolean isCirc; /* true if the list should be considered
|
|
* circular */
|
|
/*
|
|
* fields for sequential access
|
|
*/
|
|
Where atEnd; /* Where in the list the last access was */
|
|
Boolean isOpen; /* true if list has been Lst_Open'ed */
|
|
ListNode curPtr; /* current node, if open. NilListNode if
|
|
* *just* opened */
|
|
ListNode prevPtr; /* Previous node, if open. Used by
|
|
* Lst_Remove */
|
|
} *List;
|
|
|
|
#define NilList ((List)-1)
|
|
|
|
/*
|
|
* PAlloc (var, ptype) --
|
|
* Allocate a pointer-typedef structure 'ptype' into the variable 'var'
|
|
*/
|
|
#define PAlloc(var,ptype) var = (ptype) emalloc (sizeof (*var))
|
|
|
|
/*
|
|
* LstValid (l) --
|
|
* Return TRUE if the list l is valid
|
|
*/
|
|
#define LstValid(l) (((Lst)l == NILLST) ? FALSE : TRUE)
|
|
|
|
/*
|
|
* LstNodeValid (ln, l) --
|
|
* Return TRUE if the LstNode ln is valid with respect to l
|
|
*/
|
|
#define LstNodeValid(ln, l) ((((LstNode)ln) == NILLNODE) ? FALSE : TRUE)
|
|
|
|
/*
|
|
* LstIsEmpty (l) --
|
|
* TRUE if the list l is empty.
|
|
*/
|
|
#define LstIsEmpty(l) (((List)l)->firstPtr == NilListNode)
|
|
|
|
#endif _LSTINT_H_
|