dllist.h

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00001 /*
00002 Libraries for fields, doubly-linked lists and red-black trees.
00003 Copyright (C) 2001 James S. Plank
00004 
00005 This library is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Lesser General Public
00007 License as published by the Free Software Foundation; either
00008 version 2.1 of the License, or (at your option) any later version.
00009 
00010 This library is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Lesser General Public License for more details.
00014 
00015 You should have received a copy of the GNU Lesser General Public
00016 License along with this library; if not, write to the Free Software
00017 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018 
00019 ---------------------------------------------------------------------------
00020 Please see http://www.cs.utk.edu/~plank/plank/classes/cs360/360/notes/Libfdr/
00021 for instruction on how to use this library.
00022 
00023 Jim Plank
00024 plank@cs.utk.edu
00025 http://www.cs.utk.edu/~plank
00026 
00027 Associate Professor
00028 Department of Computer Science
00029 University of Tennessee
00030 203 Claxton Complex
00031 1122 Volunteer Blvd.
00032 Knoxville, TN 37996-3450
00033 
00034      865-974-4397
00035 Fax: 865-974-4404
00036 */
00037 #ifndef _DLLIST_H_
00038 #define _DLLIST_H_
00039 
00040 #include "jval.h"
00041 
00042 typedef struct dllist {
00043   struct dllist *flink;
00044   struct dllist *blink;
00045   Jval val;
00046 } *Dllist;
00047 
00048 extern Dllist new_dllist();
00049 extern void free_dllist(Dllist);
00050 
00051 extern void dll_append(Dllist, Jval);
00052 extern void dll_prepend(Dllist, Jval);
00053 extern void dll_insert_b(Dllist, Jval);
00054 extern void dll_insert_a(Dllist, Jval);
00055 
00056 extern void dll_delete_node(Dllist);
00057 extern int dll_empty(Dllist);
00058 
00059 extern Jval dll_val(Dllist);
00060 
00061 #define dll_first(d) ((d)->flink)
00062 #define dll_next(d) ((d)->flink)
00063 #define dll_last(d) ((d)->blink)
00064 #define dll_prev(d) ((d)->blink)
00065 #define dll_nil(d) (d)
00066 
00067 #define dll_traverse(ptr, list) \
00068   for (ptr = list->flink; ptr != list; ptr = ptr->flink)
00069 #define dll_rtraverse(ptr, list) \
00070   for (ptr = list->blink; ptr != list; ptr = ptr->blink)
00071 
00072 #endif

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