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// MIT License, Copyright (c) 2020 Marvin Borner
#include <def.h>
#include <list.h>
#include <mem.h>
static int nonce = 0;
struct list *list_new()
{
struct list *list = malloc(sizeof(*list));
list->head = NULL;
return list;
}
struct node *list_new_node()
{
struct node *node = malloc(sizeof(*node));
node->data = NULL;
node->prev = NULL;
node->next = NULL;
node->nonce = nonce++;
return node;
}
struct node *list_add_node(struct list *list, struct node *node)
{
if (!list || !node)
return NULL;
if (list->head == NULL) {
list->head = node;
return list->head;
}
struct node *iterator = list->head;
while (iterator != NULL) {
if (iterator->next == NULL) {
iterator->next = node;
node->prev = iterator;
break;
}
iterator = iterator->next;
}
return node;
}
struct node *list_last(struct list *list)
{
if (!list || !list->head)
return NULL;
struct node *iterator = list->head;
while (iterator != NULL) {
if (iterator->next == NULL)
return iterator;
iterator = iterator->next;
}
return NULL;
}
struct node *list_first_data(struct list *list, void *data)
{
if (!list || !list->head || !data)
return NULL;
struct node *iterator = list->head;
while (iterator != NULL) {
if (iterator->data == data)
return iterator;
iterator = iterator->next;
}
return NULL;
}
// TODO: Actually swap the nodes, not the data
struct list *list_swap(struct list *list, struct node *a, struct node *b)
{
if (!list || !list->head || !a || !b)
return NULL;
void *tmp = a->data;
a->data = b->data;
b->data = tmp;
return list;
}
struct node *list_add(struct list *list, void *data)
{
struct node *node = list_new_node();
node->data = data;
return list_add_node(list, node);
}
// Maybe list_remove_node?
struct list *list_remove(struct list *list, struct node *node)
{
if (!list || !list->head || !node)
return NULL;
if (list->head == node) {
list->head = list->head->next;
return list;
}
struct node *iterator = list->head->next;
while (iterator != node) {
iterator = iterator->next;
if (iterator == NULL)
return NULL;
}
iterator->prev->next = iterator->next;
iterator->next->prev = iterator->prev;
return list;
}
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