02dlist-base

最新推荐文章于 2025-08-29 15:52:01 发布

转载最新推荐文章于 2025-08-29 15:52:01 发布 · 597 阅读

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list.h

typedef int elem_t;

struct node_info {
    elem_t data;
    struct node_info *prev;
    struct node_info *next;
};

struct list_info {
    struct node_info *head;
    void (*add)(struct list_info *,
            struct node_info *); 
    void (*add_tail)(struct list_info *,
            struct node_info *); 
    void (*del)(struct list_info *,
            struct node_info *); 
    void (*for_each)(struct list_info *,
            void (*)(struct node_info*));
};

#define list_for_each(cur, head) \
    for (cur = (head)->next; \
        cur != (head); \
        cur = (cur)->next)

void list_init(struct list_info *); 
void list_destroy(struct list_info *);

list.c

#include <stdio.h>
#include <stdlib.h>
#include "list.h"


/* 灏.ode?..?颁袱涓..?昏.??rev
 * prev?.ext蹇.』?搁.锛..?.??..
 */
static void __list_add(struct node_info *node,
        struct node_info *prev,
        struct node_info *next)
{
    node->prev = prev;
    node->next = next;
    prev->next = node;
    next->prev = node;
}

static void list_add(struct list_info *info, 
        struct node_info *node)
{
    __list_add(node, info->head, info->head->next);
}

static void list_add_tail(struct list_info *info, 
        struct node_info *node)
{
    __list_add(node, info->head->prev, info->head);
}

static void list_del(struct list_info *info,
        struct node_info *node)
{
    node->prev->next = node->next;
    node->next->prev = node->prev;
    node->prev = node;
    node->next = node;
}

static void for_each(struct list_info *info,
        void (*todo)(struct node_info *)) 
{
    struct node_info *cur = info->head->next;

    for (; cur != info->head; cur = cur->next) {
        todo(cur);
    }   
}

void list_init(struct list_info *info)
{
    info->head = (struct node_info *)malloc(sizeof(struct node_info));
    info->head->data = 0;
    info->head->prev = info->head;
    info->head->next = info->head;

    info->add = list_add;
    info->add_tail = list_add_tail;
    info->del = list_del;
    info->for_each = for_each;
}

void list_destroy(struct list_info *info)
{
    struct node_info *cur = info->head->next;

    for (; cur != info->head; cur = info->head->next) {
        list_del(info, cur);
    }

    free(info->head);
}

test.c

#include <stdio.h>
#include "list.h"

#define LIST_LEN 10

static void print(struct node_info *node)
{
printf("%d ", node->data);
}

int main()
{
struct list_info list;
list_init(&list);

struct node_info s[LIST_LEN] = {0};

    size_t i = 0;
    for (i = 0; i < LIST_LEN; i++) {
        s[i].data = i;
        list.add_tail(&list, s + i);
    }

list.del(&list, s + 0);
list.del(&list, s + 1);

/*        list.for_each(&list, print);*/
    struct node_info *cur = NULL;
    list_for_each(cur, list.head) {
        printf("%d ", cur->data);
    }
    printf("\n");

list_destroy(&list);

return 0;
}