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/*
* active port forwarder - software for secure forwarding
* Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "buf_list_struct.h"
/*
* Function name: BufList_new
* Description: Creates and initializes new BufList structure.
* Returns: Newly created BufList structure.
*/
BufList*
BufList_new()
{
BufList* tmp = calloc(1, sizeof(BufList));
assert(tmp != NULL);
if (tmp == NULL) {
return NULL;
}
return tmp;
}
/*
* Function name: BufList_free
* Description: Frees the memory allocated for BufList structure.
* Arguments: bl - pointer to pointer to BufList structure.
*/
void
BufList_free(BufList** bl)
{
assert(bl != NULL);
if (bl == NULL) {
return;
}
assert((*bl) != NULL);
if ((*bl) == NULL) {
return;
}
BufList_clear((*bl));
free((*bl));
(*bl) = NULL;
}
/*
* Function name: BufList_insert_back
* Description: Inserts new node at the end of the list.
* Arguments: bl - pointer to BufList structure
* bln - pointer to BufListNode structure
*/
void
BufList_insert_back(BufList* bl, BufListNode* bln)
{
assert(bl != NULL);
if (bl == NULL) {
return;
}
assert(bln != NULL);
if (bln == NULL) {
return;
}
if (bl->tail) {
bl->tail->nextNode = bln;
}
else {
bl->head = bln;
}
bl->tail = bln;
bln->nextNode = NULL;
}
/*
* Function name: BufList_get_first
* Description: Get first node from the beginning of the list.
* Arguments: bl - pointer to BufList structure
* Returns: First node from the beginning of the list.
*/
BufListNode*
BufList_get_first(BufList* bl)
{
assert(bl != NULL);
if (bl == NULL) {
return NULL;
}
return bl->head;
}
/*
* Function name: BufList_delete_first
* Description: Deletes first node from the beginning of the list.
* Arguments: bl - pointer to BufList structure
*/
void
BufList_delete_first(BufList* bl)
{
BufListNode* tmp = BufList_get_first(bl);
assert(tmp != NULL);
if (tmp == NULL) {
return;
}
if (tmp == bl->tail) { /* this is the last node in the list */
bl->head = bl->tail = NULL;
}
else { /* there are other nodes*/
bl->head = BufListNode_get_nextNode(tmp);
}
BufListNode_free(&tmp);
}
/*
* Function name: BufList_clear
* Description: Deletes all nodes from the list.
* Arguments: bl - pointer to BufList structure
*/
void
BufList_clear(BufList* bl)
{
assert(bl != NULL);
if (bl == NULL) {
return;
}
while (BufList_get_first(bl)) {
BufList_delete_first(bl);
}
}
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