liststack——链表栈（procedure）

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

#define   NAMESIZE  24

typedef struct stuinfo{
 int id;
 char name[NAMESIZE];
 int math;
}DATA;

static void print_s(const void *data)
{
 const DATA *stup = data;
 printf("%d %s %d ",
   stup->id,
   stup->name,
   stup->math);
}

static int IdCmp(const void *key, const void *data)
{
 const int *id = key;
 const DATA *stup = data;

 return (*id - stup->id);
}
static int NameCmp(const void *key, const void *data)
{
 const char *name = key;
 const DATA *stup = data;

 return strcmp(name, stup->name);
}

int main()
{
 int i;
 int id = 5;
 char name[NAMESIZE] = "stu3";
 DATA stu, *stup;
 STACK s = NULL;

 s = StackCreate(sizeof(DATA));
 if(s == NULL)
  return -1;

 for(i = 0; i < 6; i++)
 {
  stu.id = i + 1;
  snprintf(stu.name,NAMESIZE,
    "stu%d", i + 1);
  stu.math = 100 - i;

  PushStack(s, &stu);
 }
 PopStack(s);
 stup = TopOfStack(s);
 print_s(stup);
 TopAndPopStack(s, &stu);

 StackDisplay(s, print_s);
 StackDispose(s);
 
 return 0;
}
----------------------------------------------------------

#ifndef _STACK_H__
#define _STACK_H__

#include "list.h"

typedef LIST STACK;

STACK StackCreate(int);
int StackIsEmpty(STACK);
int PushStack(STACK, const void *);
int PopStack(STACK);
void* TopOfStack(STACK);
int TopAndPopStack(STACK, void *);
void StackDisplay(STACK, print *);
void StackDispose(STACK);

#endif
---------------------------------------------------------------

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

STACK StackCreate(int size)
{
 return ListCreate(size);
}
int StackIsEmpty(STACK s)
{
 return s->head.next == &s->head;
}
int PushStack(STACK s, const void *data)
{
 return ListInsert(s, data, HEADINSERT);
}
static int always_match(const void *key, const void *data)
{
 return 0;
}
int PopStack(STACK s)
{
 return ListDelete(s, (void *)0, always_match);
}
void* TopOfStack(STACK s)
{
 return ListFind(s, (void *)0, always_match);
}
int TopAndPopStack(STACK s, void *data)
{
 return ListFetch(s, (void *)0, always_match, data);
}
void StackDisplay(STACK s, print *funp)
{
 ListDisplay(s, funp);
}
void StackDispose(STACK s)
{
 ListDispose(s);
}
-------------------------------------------------------------------------

#ifndef _LIST_H__
#define _LIST_H__

#define HEADINSERT 1
#define TAILINSERT  2

struct listnode;
struct headnode;
typedef struct headnode *LIST;
typedef struct listnode *PtrNode;

typedef void print(const void *);
typedef int cmp(const void *, const void *);

LIST ListCreate(int);
int ListInsert(LIST, const void *, int);
void *ListFind(LIST, const void *, cmp *);
int ListDelete(LIST, const void *, cmp *);
int ListFetch(LIST, const void *, cmp *, void *);
void ListDisplay(LIST, print *);
void ListDispose(LIST);

struct listnode{
 void *data;
 struct listnode *prev;
 struct listnode *next;
};

struct headnode{
 int size;
 struct listnode head;
};

#endif
-----------------------------------------------------------------------

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

LIST ListCreate(int size)
{
 LIST handle = malloc(sizeof(*handle));
 if(NULL == handle)
  return NULL;

 handle->size = size;
 handle->head.data = NULL;
 handle->head.prev = handle->head.next = &handle->head;

 return handle;
}

int ListInsert(LIST l, const void *data, int mode)
{
 PtrNode cur = malloc(sizeof(*cur));
 if(NULL == cur)
  return -1;
 cur->data = malloc(l->size);
 if(NULL == cur->data)
 {
  free(cur);
  return -2;
 }

 memcpy(cur->data, data, l->size);

 if(mode == HEADINSERT)
 {
  cur->next = l->head.next;
  cur->prev = &l->head;
 }
 else if(mode == TAILINSERT)
 {
  cur->next = &l->head;
  cur->prev = l->head.prev;
 }
 else
 {
  free(cur->data);
  free(cur);
  return -3;
 }
 cur->prev->next = cur;
 cur->next->prev = cur;
 return 0;
}

static PtrNode find(LIST l, const void *key, cmp *funp)
{
 PtrNode p = l->head.next;

 for(;p != &l->head && funp(key, p->data); p = p->next);

 return p;
}

void *ListFind(LIST l, const void *key, cmp *funp)
{
 return find(l, key, funp)->data;
}

int ListDelete(LIST l, const void *key, cmp *funp)
{
 PtrNode p = find(l, key, funp);
 if(p == &l->head)
  return -1;

 p->prev->next = p->next;
 p->next->prev = p->prev;
 //p->prev = p->next = NULL;
 
 free(p->data);
 free(p);
 //p = NULL;
 return 0;
}

int ListFetch(LIST l, const void *key, cmp * funp, void *data)
{
 PtrNode p = find(l, key, funp);
 if(p == &l->head)
  return -1;

 memcpy(data, p->data, l->size);
 p->prev->next = p->next;
 p->next->prev = p->prev;
 //p->prev = p->next = NULL;
 
 free(p->data);
 free(p);
 //p = NULL;
 return 0;
}

void ListDisplay(LIST l, print *funp)
{
 PtrNode p = l->head.next;

 while(p != &l->head)
 {
  funp(p->data);
  p = p->next;
 }
}

void ListDispose(LIST l)
{
 PtrNode p = l->head.next;
 PtrNode q;

 while(p != &l->head)
 {
  q = p;
  p = p->next;

  free(q->data);
  free(q);
 }#FLAGS = -lmylist
all:main

main:main.o list.o stack.o

clean:
 rm -f *.o main
 free(l);
}
--------------------------------------------