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- /*-
- * lst.h --
- * Header for using the list library
- *
- * Copyright (c) 1988 by University of California Regents
- *
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appears in all copies. Neither the University of California nor
- * Adam de Boor makes any representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- *
- * $Id: lst.h,v 1.10 88/11/17 20:51:41 adam Exp $ SPRITE (Berkeley)
- */
- #ifndef _LST_H_
- #define _LST_H_
-
- #include <sprite.h>
-
- /*
- * basic typedef. This is what the Lst_ functions handle
- */
-
- typedef struct Lst *Lst;
- typedef struct LstNode *LstNode;
-
- #define NILLST ((Lst) NIL)
- #define NILLNODE ((LstNode) NIL)
-
- /*
- * 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 (*)()) 0)
- #define NOCOPY ((ClientData (*)()) 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
- */
- Lst Lst_Init(); /* Create a new list */
- Lst Lst_Duplicate(); /* Duplicate an existing list */
- void Lst_Destroy(); /* Destroy an old one */
-
- int Lst_Length(); /* Find the length of a list */
- Boolean Lst_IsEmpty(); /* True if list is empty */
-
- /*
- * Functions to modify a list
- */
- ReturnStatus Lst_Insert(); /* Insert an element before another */
- ReturnStatus Lst_Append(); /* Insert an element after another */
- ReturnStatus Lst_AtFront(); /* Place an element at the front of
- * a lst. */
- ReturnStatus Lst_AtEnd(); /* Place an element at the end of a
- * lst. */
- ReturnStatus Lst_Remove(); /* Remove an element */
- ReturnStatus Lst_Replace(); /* Replace a node with a new value */
- ReturnStatus Lst_Move(); /* Move an element to another place */
- ReturnStatus Lst_Concat(); /* Concatenate two lists */
-
- /*
- * Node-specific functions
- */
- LstNode Lst_First(); /* Return first element in list */
- LstNode Lst_Last(); /* Return last element in list */
- LstNode Lst_Succ(); /* Return successor to given element */
- LstNode Lst_Pred(); /* Return predecessor to given
- * element */
- ClientData Lst_Datum(); /* Get datum from LstNode */
-
- /*
- * Functions for entire lists
- */
- LstNode Lst_Find(); /* Find an element in a list */
- LstNode Lst_FindFrom(); /* Find an element starting from
- * somewhere */
- LstNode Lst_Member(); /* See if the given datum is on the
- * list. Returns the LstNode containing
- * the datum */
- int Lst_Index(); /* Returns the index of a datum in the
- * list, starting from 0 */
- void Lst_ForEach(); /* Apply a function to all elements of
- * a lst */
- void Lst_ForEachFrom(); /* 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. */
- /*
- * 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().
- */
- ReturnStatus Lst_Open(); /* Open the list */
- LstNode Lst_Prev(); /* Previous element */
- LstNode Lst_Cur(); /* The current element, please */
- LstNode Lst_Next(); /* Next element please */
- Boolean Lst_IsAtEnd(); /* Done yet? */
- void Lst_Close(); /* Finish table access */
-
- /*
- * for using the list as a queue
- */
- ReturnStatus Lst_EnQueue(); /* Place an element at tail of queue */
- ClientData Lst_DeQueue(); /* Remove an element from head of
- * queue */
-
- #endif _LST_H_
-