Previously, if we attempted to build using C99 or later, we got "inline function declared but never defined" warnings and eventual "undefined reference" errors. As a result, it fails to build from source using gcc5. However, if we move the definitions to list.h and add "extern inline" declarations to list.c, which does compile using C99 and later, then it no longer compiles using gnu90, the default for gcc4. To avoid this mess, we remove the inline keywords altogether. Note that this fixes Debian bugs for wmifs [1], wmppp.app [2], and wmtime [3]. [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778170 [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778172 [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778174
170 lines
3.5 KiB
C
170 lines
3.5 KiB
C
/* Generic single linked list to keep various information
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Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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Author: Kresten Krab Thorup
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Many modifications by Alfredo K. Kojima
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA. */
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/* As a special exception, if you link this library with files compiled with
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GCC to produce an executable, this does not cause the resulting executable
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to be covered by the GNU General Public License. This exception does not
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however invalidate any other reasons why the executable file might be
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covered by the GNU General Public License. */
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#include "list.h"
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <stdlib.h>
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/* Return a cons cell produced from (head . tail) */
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LinkedList*
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list_cons(void* head, LinkedList* tail)
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{
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LinkedList* cell;
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cell = (LinkedList*)malloc(sizeof(LinkedList));
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cell->head = head;
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cell->tail = tail;
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return cell;
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}
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/* Return the length of a list, list_length(NULL) returns zero */
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int
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list_length(LinkedList* list)
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{
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int i = 0;
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while(list)
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{
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i += 1;
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list = list->tail;
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}
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return i;
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}
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/* Return the Nth element of LIST, where N count from zero. If N
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larger than the list length, NULL is returned */
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void*
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list_nth(int index, LinkedList* list)
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{
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while(index-- != 0)
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{
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if(list->tail)
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list = list->tail;
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else
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return 0;
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}
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return list->head;
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}
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/* Remove the element at the head by replacing it by its successor */
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void
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list_remove_head(LinkedList** list)
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{
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if (!*list) return;
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if ((*list)->tail)
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{
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LinkedList* tail = (*list)->tail; /* fetch next */
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*(*list) = *tail; /* copy next to list head */
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free(tail); /* free next */
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}
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else /* only one element in list */
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{
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free(*list);
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(*list) = 0;
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}
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}
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/* Remove the element with `car' set to ELEMENT */
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/*
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void
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list_remove_elem(LinkedList** list, void* elem)
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{
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while (*list)
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{
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if ((*list)->head == elem)
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list_remove_head(list);
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*list = (*list ? (*list)->tail : NULL);
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}
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}*/
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LinkedList *
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list_remove_elem(LinkedList* list, void* elem)
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{
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LinkedList *tmp;
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if (list) {
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if (list->head == elem) {
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tmp = list->tail;
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free(list);
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return tmp;
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}
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list->tail = list_remove_elem(list->tail, elem);
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return list;
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}
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return NULL;
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}
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/* Return element that has ELEM as car */
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LinkedList*
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list_find(LinkedList* list, void* elem)
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{
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while(list)
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{
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if (list->head == elem)
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return list;
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list = list->tail;
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}
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return NULL;
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}
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/* Free list (backwards recursive) */
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void
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list_free(LinkedList* list)
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{
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if(list)
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{
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list_free(list->tail);
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free(list);
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}
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}
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/* Map FUNCTION over all elements in LIST */
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void
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list_mapcar(LinkedList* list, void(*function)(void*))
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{
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while(list)
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{
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(*function)(list->head);
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list = list->tail;
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}
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}
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