716154c592
Updated AUTHORS, COPYING, DISCLAIMER, and INSTALL files. Added standardized headers to all source file to clearly indicate the copyright, license, and to give credit where credit is due.
280 lines
8.8 KiB
C
280 lines
8.8 KiB
C
/*****************************************************************************
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2001-2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Chris Dunlap <cdunlap@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is from LSD-Tools, the LLNL Software Development Toolbox.
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*
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* LSD-Tools is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* LSD-Tools is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with LSD-Tools. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************/
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#ifndef LSD_LIST_H
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#define LSD_LIST_H
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/***********
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* Notes *
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***********/
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/*
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* If NDEBUG is not defined, internal debug code will be enabled. This is
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* intended for development use only and production code should define NDEBUG.
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*
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* If WITH_LSD_FATAL_ERROR_FUNC is defined, the linker will expect to
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* find an external lsd_fatal_error(file,line,mesg) function. By default,
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* lsd_fatal_error(file,line,mesg) is a macro definition that outputs an
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* error message to stderr. This macro may be redefined to invoke another
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* routine instead.
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*
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* If WITH_LSD_NOMEM_ERROR_FUNC is defined, the linker will expect to
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* find an external lsd_nomem_error(file,line,mesg) function. By default,
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* lsd_nomem_error(file,line,mesg) is a macro definition that returns NULL.
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* This macro may be redefined to invoke another routine instead.
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*
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* If WITH_PTHREADS is defined, these routines will be thread-safe.
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*/
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/****************
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* Data Types *
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****************/
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typedef struct list * List;
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/*
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* List opaque data type.
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*/
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typedef struct listIterator * ListIterator;
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/*
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* List Iterator opaque data type.
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*/
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typedef void (*ListDelF) (void *x);
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/*
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* Function prototype to deallocate data stored in a list.
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* This function is responsible for freeing all memory associated
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* with an item, including all subordinate items (if applicable).
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*/
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typedef int (*ListCmpF) (void *x, void *y);
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/*
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* Function prototype for comparing two items in a list.
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* Returns less-than-zero if (x<y), zero if (x==y), and
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* greather-than-zero if (x>y).
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*/
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typedef int (*ListFindF) (void *x, void *key);
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/*
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* Function prototype for matching items in a list.
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* Returns non-zero if (x==key); o/w returns zero.
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*/
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typedef int (*ListForF) (void *x, void *arg);
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/*
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* Function prototype for operating on each item in a list.
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* Returns less-than-zero on error.
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*/
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/*******************************
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* General-Purpose Functions *
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*******************************/
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List list_create (ListDelF f);
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/*
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* Creates and returns a new empty list, or lsd_nomem_error() on failure.
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* The deletion function [f] is used to deallocate memory used by items
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* in the list; if this is NULL, memory associated with these items
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* will not be freed when the list is destroyed.
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* Note: Abandoning a list without calling list_destroy() will result
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* in a memory leak.
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*/
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void list_destroy (List l);
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/*
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* Destroys list [l], freeing memory used for list iterators and the
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* list itself; if a deletion function was specified when the list
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* was created, it will be called for each item in the list.
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*/
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int list_is_empty (List l);
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/*
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* Returns non-zero if list [l] is empty; o/w returns zero.
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*/
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int list_count (List l);
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/*
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* Returns the number of items in list [l].
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*/
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/***************************
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* List Access Functions *
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***************************/
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void * list_append (List l, void *x);
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/*
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* Inserts data [x] at the end of list [l].
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* Returns the data's ptr, or lsd_nomem_error() if insertion failed.
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*/
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void * list_prepend (List l, void *x);
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/*
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* Inserts data [x] at the beginning of list [l].
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* Returns the data's ptr, or lsd_nomem_error() if insertion failed.
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*/
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void * list_find_first (List l, ListFindF f, void *key);
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/*
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* Traverses list [l] using [f] to match each item with [key].
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* Returns a ptr to the first item for which the function [f]
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* returns non-zero, or NULL if no such item is found.
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* Note: This function differs from list_find() in that it does not require
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* a list iterator; it should only be used when all list items are known
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* to be unique (according to the function [f]).
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*/
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int list_delete_all (List l, ListFindF f, void *key);
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/*
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* Traverses list [l] using [f] to match each item with [key].
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* Removes all items from the list for which the function [f] returns
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* non-zero; if a deletion function was specified when the list was
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* created, it will be called to deallocate each item being removed.
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* Returns a count of the number of items removed from the list.
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*/
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int list_for_each (List l, ListForF f, void *arg);
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/*
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* For each item in list [l], invokes the function [f] with [arg].
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* Returns a count of the number of items on which [f] was invoked.
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* If [f] returns <0 for a given item, the iteration is aborted and the
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* function returns the negative of that item's position in the list.
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*/
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void list_sort (List l, ListCmpF f);
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/*
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* Sorts list [l] into ascending order according to the function [f].
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* Note: Sorting a list resets all iterators associated with the list.
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* Note: The sort algorithm is stable.
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*/
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/****************************
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* Stack Access Functions *
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****************************/
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void * list_push (List l, void *x);
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/*
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* Pushes data [x] onto the top of stack [l].
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* Returns the data's ptr, or lsd_nomem_error() if insertion failed.
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*/
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void * list_pop (List l);
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/*
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* Pops the data item at the top of the stack [l].
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* Returns the data's ptr, or NULL if the stack is empty.
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*/
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void * list_peek (List l);
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/*
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* Peeks at the data item at the top of the stack (or head of the queue) [l].
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* Returns the data's ptr, or NULL if the stack (or queue) is empty.
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* Note: The item is not removed from the list.
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*/
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/****************************
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* Queue Access Functions *
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****************************/
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void * list_enqueue (List l, void *x);
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/*
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* Enqueues data [x] at the tail of queue [l].
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* Returns the data's ptr, or lsd_nomem_error() if insertion failed.
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*/
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void * list_dequeue (List l);
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/*
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* Dequeues the data item at the head of the queue [l].
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* Returns the data's ptr, or NULL if the queue is empty.
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*/
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/*****************************
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* List Iterator Functions *
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*****************************/
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ListIterator list_iterator_create (List l);
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/*
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* Creates and returns a list iterator for non-destructively traversing
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* list [l], or lsd_nomem_error() on failure.
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*/
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void list_iterator_reset (ListIterator i);
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/*
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* Resets the list iterator [i] to start traversal at the beginning
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* of the list.
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*/
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void list_iterator_destroy (ListIterator i);
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/*
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* Destroys the list iterator [i]; list iterators not explicitly destroyed
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* in this manner will be destroyed when the list is deallocated via
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* list_destroy().
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*/
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void * list_next (ListIterator i);
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/*
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* Returns a ptr to the next item's data,
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* or NULL once the end of the list is reached.
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* Example: i=list_iterator_create(i); while ((x=list_next(i))) {...}
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*/
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void * list_insert (ListIterator i, void *x);
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/*
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* Inserts data [x] immediately before the last item returned via list
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* iterator [i]; once the list iterator reaches the end of the list,
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* insertion is made at the list's end.
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* Returns the data's ptr, or lsd_nomem_error() if insertion failed.
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*/
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void * list_find (ListIterator i, ListFindF f, void *key);
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/*
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* Traverses the list from the point of the list iterator [i]
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* using [f] to match each item with [key].
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* Returns a ptr to the next item for which the function [f]
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* returns non-zero, or NULL once the end of the list is reached.
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* Example: i=list_iterator_reset(i); while ((x=list_find(i,f,k))) {...}
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*/
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void * list_remove (ListIterator i);
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/*
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* Removes from the list the last item returned via list iterator [i]
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* and returns the data's ptr.
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* Note: The client is responsible for freeing the returned data.
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*/
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int list_delete (ListIterator i);
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/*
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* Removes from the list the last item returned via list iterator [i];
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* if a deletion function was specified when the list was created,
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* it will be called to deallocate the item being removed.
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* Returns a count of the number of items removed from the list
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* (ie, '1' if the item was removed, and '0' otherwise).
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*/
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#endif /* !LSD_LIST_H */
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