143 lines
5.3 KiB
C
143 lines
5.3 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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* Copyright (c) 1988, 1989 by Adam de Boor
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)lst.h 5.3 (Berkeley) 6/1/90
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*/
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/*-
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* lst.h --
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* Header for using the list library
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*/
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#ifndef _LST_H_
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#define _LST_H_
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#include <sprite.h>
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/*
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* basic typedef. This is what the Lst_ functions handle
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*/
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typedef struct Lst *Lst;
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typedef struct LstNode *LstNode;
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#define NILLST ((Lst) NIL)
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#define NILLNODE ((LstNode) NIL)
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/*
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* NOFREE can be used as the freeProc to Lst_Destroy when the elements are
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* not to be freed.
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* NOCOPY performs similarly when given as the copyProc to Lst_Duplicate.
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*/
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#define NOFREE ((void (*)()) 0)
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#define NOCOPY ((ClientData (*)()) 0)
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#define LST_CONCNEW 0 /* create new LstNode's when using Lst_Concat */
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#define LST_CONCLINK 1 /* relink LstNode's when using Lst_Concat */
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/*
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* Creation/destruction functions
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*/
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Lst Lst_Init(); /* Create a new list */
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Lst Lst_Duplicate(); /* Duplicate an existing list */
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void Lst_Destroy(); /* Destroy an old one */
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int Lst_Length(); /* Find the length of a list */
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Boolean Lst_IsEmpty(); /* True if list is empty */
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/*
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* Functions to modify a list
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*/
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ReturnStatus Lst_Insert(); /* Insert an element before another */
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ReturnStatus Lst_Append(); /* Insert an element after another */
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ReturnStatus Lst_AtFront(); /* Place an element at the front of
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* a lst. */
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ReturnStatus Lst_AtEnd(); /* Place an element at the end of a
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* lst. */
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ReturnStatus Lst_Remove(); /* Remove an element */
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ReturnStatus Lst_Replace(); /* Replace a node with a new value */
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ReturnStatus Lst_Move(); /* Move an element to another place */
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ReturnStatus Lst_Concat(); /* Concatenate two lists */
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/*
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* Node-specific functions
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*/
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LstNode Lst_First(); /* Return first element in list */
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LstNode Lst_Last(); /* Return last element in list */
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LstNode Lst_Succ(); /* Return successor to given element */
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LstNode Lst_Pred(); /* Return predecessor to given
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* element */
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ClientData Lst_Datum(); /* Get datum from LstNode */
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/*
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* Functions for entire lists
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*/
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LstNode Lst_Find(); /* Find an element in a list */
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LstNode Lst_FindFrom(); /* Find an element starting from
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* somewhere */
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LstNode Lst_Member(); /* See if the given datum is on the
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* list. Returns the LstNode containing
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* the datum */
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int Lst_Index(); /* Returns the index of a datum in the
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* list, starting from 0 */
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void Lst_ForEach(); /* Apply a function to all elements of
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* a lst */
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void Lst_ForEachFrom(); /* Apply a function to all elements of
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* a lst starting from a certain point.
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* If the list is circular, the
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* application will wrap around to the
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* beginning of the list again. */
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/*
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* these functions are for dealing with a list as a table, of sorts.
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* An idea of the "current element" is kept and used by all the functions
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* between Lst_Open() and Lst_Close().
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*/
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ReturnStatus Lst_Open(); /* Open the list */
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LstNode Lst_Prev(); /* Previous element */
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LstNode Lst_Cur(); /* The current element, please */
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LstNode Lst_Next(); /* Next element please */
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Boolean Lst_IsAtEnd(); /* Done yet? */
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void Lst_Close(); /* Finish table access */
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/*
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* for using the list as a queue
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*/
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ReturnStatus Lst_EnQueue(); /* Place an element at tail of queue */
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ClientData Lst_DeQueue(); /* Remove an element from head of
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* queue */
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#endif _LST_H_
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