130 lines
2.3 KiB
C
130 lines
2.3 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "linkedlist.h"
|
|
|
|
static
|
|
void *linkedlist_malloc(unsigned int size)
|
|
{
|
|
void *ptr;
|
|
ptr = malloc(size);
|
|
if (ptr == NULL) {
|
|
perror("[!!] Fatal error in linkedlist_malloc() on memory allocation");
|
|
exit(-1);
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
static
|
|
LinkedList* linkedlist_node_create()
|
|
{
|
|
LinkedList *newList = linkedlist_malloc(sizeof(LinkedList));
|
|
newList->next = NULL;
|
|
newList->data = NULL;
|
|
return newList;
|
|
}
|
|
|
|
LinkedList* linkedlist_create()
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static void copy_data(void *dest, void *src, unsigned int size)
|
|
{
|
|
int i;
|
|
for (i = 0; i < size; ++i)
|
|
*(char*)(dest + i) = *(char*)(src + i);
|
|
}
|
|
|
|
void linkedlist_push(LinkedList **head, void *value, unsigned int size)
|
|
{
|
|
|
|
LinkedList *node = linkedlist_node_create();
|
|
node->data = linkedlist_malloc(size);
|
|
copy_data(node->data, value, size);
|
|
node->next = *head;
|
|
|
|
*head = node;
|
|
}
|
|
|
|
void* linkedlist_pop(LinkedList **head)
|
|
{
|
|
if (*head == NULL)
|
|
return NULL;
|
|
|
|
void *data = (*head)->data;
|
|
LinkedList *oldHead = *head;
|
|
*head = (*head)->next;
|
|
free(oldHead);
|
|
|
|
return data;
|
|
}
|
|
|
|
void linkedlist_append(LinkedList **head, void *value, unsigned int size)
|
|
{
|
|
if (*head == NULL) {
|
|
*head = linkedlist_node_create();
|
|
(*head)->data = linkedlist_malloc(size);
|
|
copy_data((*head)->data, value, size);
|
|
} else {
|
|
linkedlist_append(&(*head)->next, value, size);
|
|
}
|
|
}
|
|
|
|
void* linkedlist_poplast(LinkedList **head)
|
|
{
|
|
if (*head == NULL)
|
|
return NULL;
|
|
|
|
if ((*head)->next == NULL) {
|
|
void* data = (*head)->data;
|
|
free(*head);
|
|
*head = NULL;
|
|
return data;
|
|
}
|
|
|
|
LinkedList *nextNode = (*head)->next;
|
|
if (nextNode->next == NULL) {
|
|
void *data = nextNode->data;
|
|
free((*head)->next);
|
|
(*head)->next = NULL;
|
|
return data;
|
|
}
|
|
|
|
return linkedlist_poplast(&nextNode);
|
|
}
|
|
|
|
void* linkedlist_get(LinkedList **head, unsigned int index)
|
|
{
|
|
if (*head == NULL)
|
|
return NULL;
|
|
if (index == 0)
|
|
return (*head)->data;
|
|
|
|
return linkedlist_get(&(*head)->next, --index);
|
|
}
|
|
|
|
void linkedlist_destroy(LinkedList **head)
|
|
{
|
|
if (*head == NULL) {
|
|
return;
|
|
}
|
|
if ((*head)->next != NULL) {
|
|
linkedlist_destroy(&(*head)->next);
|
|
free((*head)->next);
|
|
(*head)->next = NULL;
|
|
}
|
|
|
|
free((*head)->data);
|
|
(*head)->data = NULL;
|
|
free(*head);
|
|
*head = NULL;
|
|
}
|
|
|
|
unsigned int linkedlist_size(LinkedList *head)
|
|
{
|
|
if (head == NULL) {
|
|
return 0;
|
|
}
|
|
return 1 + linkedlist_size(head->next);
|
|
}
|