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/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <stdlib.h>
#include <netif/list.h>
/*-----------------------------------------------------------------------------------*/
struct list *
list_new(int size)
{
struct list *list;
list = (struct list *)malloc(sizeof(struct list));
list->first = list->last = NULL;
list->size = size;
list->elems = 0;
return list;
}
/*-----------------------------------------------------------------------------------*/
int
list_push(struct list *list, void *data)
{
struct elem *elem;
if (list->elems < list->size) {
elem = (struct elem *)malloc(sizeof(struct elem));
elem->data = data;
elem->next = NULL;
if (list->last != NULL) {
list->last->next = elem;
}
list->last = elem;
if (list->first == NULL) {
list->first = elem;
}
list->elems++;
return 1;
}
return 0;
}
/*-----------------------------------------------------------------------------------*/
void *
list_pop(struct list *list)
{
struct elem *elem;
void *data;
if (list->elems > 0) {
elem = list->first;
if (elem == list->last) {
list->last = elem->next;
}
list->first = elem->next;
list->elems--;
data = elem->data;
free(elem);
return data;
}
return NULL;
}
/*-----------------------------------------------------------------------------------*/
void *
list_first(struct list *list)
{
return list->first;
}
/*-----------------------------------------------------------------------------------*/
int
list_elems(struct list *list)
{
return list->elems;
}
/*-----------------------------------------------------------------------------------*/
void
list_delete(struct list *list)
{
while (list_pop(list) != NULL);
free(list);
}
/*-----------------------------------------------------------------------------------*/
int
list_remove(struct list *list, void *elem)
{
struct elem *e, *p;
p = NULL;
for(e = list->first; e != NULL; e = e->next) {
if (e->data == elem) {
if (p != NULL) {
p->next = e->next;
} else {
list->first = e->next;
}
if (list->last == e) {
list->last = p;
if (p != NULL) {
p->next = NULL;
}
}
free(e);
list->elems--;
return 1;
}
p = e;
}
return 0;
}
/*-----------------------------------------------------------------------------------*/
void
list_map(struct list *list, void (* func)(void *arg))
{
struct elem *e;
for(e = list->first; e != NULL; e = e->next) {
func(e->data);
}
}
/*-----------------------------------------------------------------------------------*/
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