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