/******************** (C) COPYRIGHT 2012 STMicroelectronics ********************
* File Name          : list.c
* Author             : AMS - HEA&RF BU
* Version            : V1.0.0
* Date               : 19-July-2012
* Description        : Circular Linked List Implementation.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/******************************************************************************
 * Include Files
******************************************************************************/
#include <hal_types.h>
#include <list.h>

/******************************************************************************
 * Function Definitions 
******************************************************************************/
void list_init_head (tListNode * listHead)
{
	listHead->next = listHead;
	listHead->prev = listHead;	
}

uint8_t list_is_empty (tListNode * listHead)
{
	return ((listHead->next == listHead)? TRUE:FALSE);
}

void list_insert_head (tListNode * listHead, tListNode * node)
{
	node->next = listHead->next;
	node->prev = listHead;
	listHead->next = node;
	(node->next)->prev = node;
}


void list_insert_tail (tListNode * listHead, tListNode * node)
{
	node->next = listHead;
	node->prev = listHead->prev;
	listHead->prev = node;
   (node->prev)->next = node;
}


void list_remove_node (tListNode * node)
{
	(node->prev)->next = node->next;
	(node->next)->prev = node->prev;
}


void list_remove_head (tListNode * listHead, tListNode ** node )
{
	*node = listHead->next;
	list_remove_node (listHead->next);
	(*node)->next = NULL;
	(*node)->prev = NULL;
}


void list_remove_tail (tListNode * listHead, tListNode ** node )
{
	*node = listHead->prev;
	list_remove_node (listHead->prev);
	(*node)->next = NULL;
	(*node)->prev = NULL;
}


void list_insert_node_after (tListNode * node, tListNode * ref_node)
{
	node->next = ref_node->next;
	node->prev = ref_node;
	ref_node->next = node;
	(node->next)->prev = node;
}


void list_insert_node_before (tListNode * node, tListNode * ref_node)
{
	node->next = ref_node;
	node->prev = ref_node->prev;
	ref_node->prev = node;
	(node->prev)->next = node;
}


int list_get_size (tListNode * listHead)
{
	int size = 0;
	tListNode * temp = listHead->next;
	while (temp != listHead)
	{
		size++;
		temp = temp->next;		
	}
	return (size);
}

void list_get_next_node (tListNode * ref_node, tListNode ** node)
{
    *node = ref_node->next;
}


void list_get_prev_node (tListNode * ref_node, tListNode ** node)
{
    *node = ref_node->prev;
}