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-/*****************************************************************************
- * $Id: list.h 2899 2002-12-11 19:00:36Z dun $
- *****************************************************************************
- * Copyright (C) 2001-2002 The Regents of the University of California.
- * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- * Written by Chris Dunlap <[email protected]>.
- *
- * This file is from LSD-Tools, the LLNL Software Development Toolbox.
- *
- * LSD-Tools is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * LSD-Tools is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with LSD-Tools; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *****************************************************************************/
-
-
-#ifndef LSD_LIST_H
-#define LSD_LIST_H
-
-
-/***********
- * Notes *
- ***********/
-/*
- * If NDEBUG is not defined, internal debug code will be enabled. This is
- * intended for development use only and production code should define NDEBUG.
- *
- * If WITH_LSD_FATAL_ERROR_FUNC is defined, the linker will expect to
- * find an external lsd_fatal_error(file,line,mesg) function. By default,
- * lsd_fatal_error(file,line,mesg) is a macro definition that outputs an
- * error message to stderr. This macro may be redefined to invoke another
- * routine instead.
- *
- * If WITH_LSD_NOMEM_ERROR_FUNC is defined, the linker will expect to
- * find an external lsd_nomem_error(file,line,mesg) function. By default,
- * lsd_nomem_error(file,line,mesg) is a macro definition that returns NULL.
- * This macro may be redefined to invoke another routine instead.
- *
- * If WITH_PTHREADS is defined, these routines will be thread-safe.
- */
-
-
-/****************
- * Data Types *
- ****************/
-
-typedef struct list * List;
-/*
- * List opaque data type.
- */
-
-typedef struct listIterator * ListIterator;
-/*
- * List Iterator opaque data type.
- */
-
-typedef void (*ListDelF) (void *x);
-/*
- * Function prototype to deallocate data stored in a list.
- * This function is responsible for freeing all memory associated
- * with an item, including all subordinate items (if applicable).
- */
-
-typedef int (*ListCmpF) (void *x, void *y);
-/*
- * Function prototype for comparing two items in a list.
- * Returns less-than-zero if (x<y), zero if (x==y), and
- * greather-than-zero if (x>y).
- */
-
-typedef int (*ListFindF) (void *x, void *key);
-/*
- * Function prototype for matching items in a list.
- * Returns non-zero if (x==key); o/w returns zero.
- */
-
-typedef int (*ListForF) (void *x, void *arg);
-/*
- * Function prototype for operating on each item in a list.
- * Returns less-than-zero on error.
- */
-
-
-/*******************************
- * General-Purpose Functions *
- *******************************/
-
-List list_create (ListDelF f);
-/*
- * Creates and returns a new empty list, or lsd_nomem_error() on failure.
- * The deletion function [f] is used to deallocate memory used by items
- * in the list; if this is NULL, memory associated with these items
- * will not be freed when the list is destroyed.
- * Note: Abandoning a list without calling list_destroy() will result
- * in a memory leak.
- */
-
-void list_destroy (List l);
-/*
- * Destroys list [l], freeing memory used for list iterators and the
- * list itself; if a deletion function was specified when the list
- * was created, it will be called for each item in the list.
- */
-
-int list_is_empty (List l);
-/*
- * Returns non-zero if list [l] is empty; o/w returns zero.
- */
-
-int list_count (List l);
-/*
- * Returns the number of items in list [l].
- */
-
-
-/***************************
- * List Access Functions *
- ***************************/
-
-void * list_append (List l, void *x);
-/*
- * Inserts data [x] at the end of list [l].
- * Returns the data's ptr, or lsd_nomem_error() if insertion failed.
- */
-
-void * list_prepend (List l, void *x);
-/*
- * Inserts data [x] at the beginning of list [l].
- * Returns the data's ptr, or lsd_nomem_error() if insertion failed.
- */
-
-void * list_find_first (List l, ListFindF f, void *key);
-/*
- * Traverses list [l] using [f] to match each item with [key].
- * Returns a ptr to the first item for which the function [f]
- * returns non-zero, or NULL if no such item is found.
- * Note: This function differs from list_find() in that it does not require
- * a list iterator; it should only be used when all list items are known
- * to be unique (according to the function [f]).
- */
-
-int list_delete_all (List l, ListFindF f, void *key);
-/*
- * Traverses list [l] using [f] to match each item with [key].
- * Removes all items from the list for which the function [f] returns
- * non-zero; if a deletion function was specified when the list was
- * created, it will be called to deallocate each item being removed.
- * Returns a count of the number of items removed from the list.
- */
-
-int list_for_each (List l, ListForF f, void *arg);
-/*
- * For each item in list [l], invokes the function [f] with [arg].
- * Returns a count of the number of items on which [f] was invoked.
- * If [f] returns <0 for a given item, the iteration is aborted and the
- * function returns the negative of that item's position in the list.
- */
-
-void list_sort (List l, ListCmpF f);
-/*
- * Sorts list [l] into ascending order according to the function [f].
- * Note: Sorting a list resets all iterators associated with the list.
- * Note: The sort algorithm is stable.
- */
-
-
-/****************************
- * Stack Access Functions *
- ****************************/
-
-void * list_push (List l, void *x);
-/*
- * Pushes data [x] onto the top of stack [l].
- * Returns the data's ptr, or lsd_nomem_error() if insertion failed.
- */
-
-void * list_pop (List l);
-/*
- * Pops the data item at the top of the stack [l].
- * Returns the data's ptr, or NULL if the stack is empty.
- */
-
-void * list_peek (List l);
-/*
- * Peeks at the data item at the top of the stack (or head of the queue) [l].
- * Returns the data's ptr, or NULL if the stack (or queue) is empty.
- * Note: The item is not removed from the list.
- */
-
-
-/****************************
- * Queue Access Functions *
- ****************************/
-
-void * list_enqueue (List l, void *x);
-/*
- * Enqueues data [x] at the tail of queue [l].
- * Returns the data's ptr, or lsd_nomem_error() if insertion failed.
- */
-
-void * list_dequeue (List l);
-/*
- * Dequeues the data item at the head of the queue [l].
- * Returns the data's ptr, or NULL if the queue is empty.
- */
-
-
-/*****************************
- * List Iterator Functions *
- *****************************/
-
-ListIterator list_iterator_create (List l);
-/*
- * Creates and returns a list iterator for non-destructively traversing
- * list [l], or lsd_nomem_error() on failure.
- */
-
-void list_iterator_reset (ListIterator i);
-/*
- * Resets the list iterator [i] to start traversal at the beginning
- * of the list.
- */
-
-void list_iterator_destroy (ListIterator i);
-/*
- * Destroys the list iterator [i]; list iterators not explicitly destroyed
- * in this manner will be destroyed when the list is deallocated via
- * list_destroy().
- */
-
-void * list_next (ListIterator i);
-/*
- * Returns a ptr to the next item's data,
- * or NULL once the end of the list is reached.
- * Example: i=list_iterator_create(i); while ((x=list_next(i))) {...}
- */
-
-void * list_insert (ListIterator i, void *x);
-/*
- * Inserts data [x] immediately before the last item returned via list
- * iterator [i]; once the list iterator reaches the end of the list,
- * insertion is made at the list's end.
- * Returns the data's ptr, or lsd_nomem_error() if insertion failed.
- */
-
-void * list_find (ListIterator i, ListFindF f, void *key);
-/*
- * Traverses the list from the point of the list iterator [i]
- * using [f] to match each item with [key].
- * Returns a ptr to the next item for which the function [f]
- * returns non-zero, or NULL once the end of the list is reached.
- * Example: i=list_iterator_reset(i); while ((x=list_find(i,f,k))) {...}
- */
-
-void * list_remove (ListIterator i);
-/*
- * Removes from the list the last item returned via list iterator [i]
- * and returns the data's ptr.
- * Note: The client is responsible for freeing the returned data.
- */
-
-int list_delete (ListIterator i);
-/*
- * Removes from the list the last item returned via list iterator [i];
- * if a deletion function was specified when the list was created,
- * it will be called to deallocate the item being removed.
- * Returns a count of the number of items removed from the list
- * (ie, '1' if the item was removed, and '0' otherwise).
- */
-
-
-#endif /* !LSD_LIST_H */