学生选课管理系统(全源代码

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//list.h文件

#ifndef _LIST_H

#define _LIST_H

#define _INLINE_ static inline

struct list_head {

struct list_head *next, *prev;

};

#define LIST_HEAD_INIT(name) {&(name), &(name)}

#define LIST_HEAD(name) \

struct list_head name = LIST_HEAD_INIT(name)

#define INIT_LIST_HEAD(ptr) do {\

(ptr)->next = (ptr); (ptr)->prev = (ptr); \

} while (0)

_INLINE_ void __list_add(struct list_head *add,

struct list_head *prev,

struct list_head *next)

{

next->prev = add;

add->next = next;

add->prev = prev;

prev->next = add;

}

_INLINE_ void list_add(struct list_head *add, struct list_head *head) {

__list_add(add, head, head->next);

}

_INLINE_ void list_add_tail(struct list_head *add, struct list_head *head)

{

__list_add(add, head->prev, head);

}

_INLINE_ void __list_del(struct list_head *prev, struct list_head *next)

{

next->prev = prev;

prev->next = next;

}

_INLINE_ void list_del(struct list_head *entry)

{

__list_del(entry->prev, entry->next);

}

_INLINE_ void list_del_init(struct list_head *entry)

{

__list_del(entry->prev, entry->next);

INIT_LIST_HEAD(entry);

}

_INLINE_ int list_empty(struct list_head *head)

{

return head->next == head;

}

_INLINE_ void list_splice(struct list_head *list, struct list_head *head)

{

struct list_head *first = list->next;

if (first != list) {

struct list_head *last = list->prev;

struct list_head *at = head->next;

first->prev = head;

head->next = first;

last->next = at;

at->prev = last;

}

}

#define list_entry(ptr, type, member) \

((type *)((char *)(ptr) - (unsigned long)(&((type *)0)->member)))

#define list_for_each(pos, head) \

for (pos = (head)->next; pos != (head); pos = pos->next)

#define list_for_each_safe(pos, pnext, head) \

for (pos = (head)->next, pnext = pos->next; pos != (head); \

pos = pnext, pnext = pos->next)

#undef _INLINE_

#endif

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