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#include <stdlib.h>
#include <string.h> /* memcpy */
#include "list.h"
list_t clist_create()
{
list_t list;
list.first = NULL;
list.last = NULL;
list.size = 0;
return list;
}
void clist_add(list_t *list,
void *data,
int size_of)
{
struct list_item_t *item = malloc(sizeof(struct list_item_t));
void *dest = malloc(size_of); /* allocates memory like data parameter */
memcpy(dest, data, size_of); /* copies data inside dest */
item->data = dest;
item->next = NULL;
if (list->first == NULL)
list->first = item;
if (list->last != NULL)
list->last->next = item;
list->last = item;
list->size ++;
}
void clist_add_all(list_t *dest,
list_t *other)
{
dest->last->next = other->first;
dest->size += other->size;
}
void clist_remove(list_t *list,
list_item_t *item)
{
list_item_t *curr = list->first->next;
list_item_t *prev = list->first;
if (list->first == item) {
free(list->first);
list->first = curr;
} else {
while (curr != NULL) {
if (curr == item) {
prev->next = curr->next;
free(curr);
return;
}
prev = curr;
curr = curr->next;
}
}
}
iterator_t clist_iterator(list_t *list)
{
struct iterator_t *iterator = malloc(sizeof(struct iterator_t));
iterator->current = list->first;
return *iterator;
}
int iterator_has_next(iterator_t *iterator)
{
return iterator->current != NULL;
}
list_item_t *iterator_next(iterator_t *iterator)
{
struct list_item_t *current = iterator->current;
iterator->current = iterator->current->next;
return current;
}
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