C语言实现《设计模式之禅》之代理模式——普通代理

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


/*C语言实现<设计模式之禅>之代理模式____普通代理*/


/*代理模式: 为其他对象提供一种代理以控制对这个对象的访问*/
/*普通代理:  调用者只能访问代理角色，而不能访问真实角色。 调用者只知道代理而
不用知道真实角色，屏蔽了真实角色的变更对高层模块的影响。*/




/*抽象游戏者*/
typedef struct _IGamePlayer IGamePlayer;
struct _IGamePlayer
{
    void (*login)(char *pName, char *pPassword, void *);
    void (*killBoss)(void *);
    void (*upgrade)(void *);
    void (*DeleteIGamePlayer)(void *);
};


/*游戏者*/
typedef struct _GamePlayer GamePlayer;
struct _GamePlayer
{
    IGamePlayer gmplayer;   /*继承抽象游戏者*/
    char acName[10];
    void (*DeleteGamePlayer)(GamePlayer *pGamePlayer);
};


void login(char *pName, char *pPassword, void *pGamePlayer)
{
    printf("user :%s is login in !\n", pName);
}


void killBoss(void *pGamePlayer)
{
    printf("%s is killing the boss! \n", ((GamePlayer *)pGamePlayer)->acName);
}


void upgrade(void *pGamePlayer)
{
    printf("%s is upgrading !\n", ((GamePlayer *)pGamePlayer)->acName);
}


void DeleteGamePlayer(GamePlayer *pGamePlayer)
{
    if(pGamePlayer)
    {
        free(pGamePlayer);
        pGamePlayer = NULL;
    }
}


GamePlayer *CreateGamePlayer(IGamePlayer *pIGamePlayer, char *pName)
{
    GamePlayer *pGamePlayer = NULL;
    if(!pIGamePlayer)
    {
        return NULL;
    }
    else
    {
        pGamePlayer = (GamePlayer *)malloc(sizeof(GamePlayer));
        if(!pGamePlayer)
        {
            return NULL;
        }
        memset(pGamePlayer, 0, sizeof(GamePlayer));
        strcpy(pGamePlayer->acName, pName);
        pGamePlayer->DeleteGamePlayer = DeleteGamePlayer;
        pGamePlayer->gmplayer.login = login;
        pGamePlayer->gmplayer.killBoss = killBoss;
        pGamePlayer->gmplayer.upgrade = upgrade;
        pGamePlayer->gmplayer.DeleteIGamePlayer = pGamePlayer->DeleteGamePlayer;
        return pGamePlayer;
    }
}








/*普通代理的代理者*/
typedef struct _GamePlayerProxy GamePlayerProxy;
struct _GamePlayerProxy
{
    IGamePlayer gmplayer;   /*继承抽象游戏者*/
    GamePlayer *pGamePlayer; /*被代理者*/
    void (*DeleteGamePlayerProxy)(GamePlayerProxy *pGamePlayerProxy);
};


void ProxykillBoss(void * pGamePlayerProxy)
{
((GamePlayerProxy *)pGamePlayerProxy)->pGamePlayer->gmplayer.killBoss(((GamePlayerProxy *)pGamePlayerProxy)->pGamePlayer);    /*代理执行被代理者的方法*/
}


void Proxylogin(char *pName, char *pPassword, void *pGamePlayerProxy)
{
    ((GamePlayerProxy *)pGamePlayerProxy)->pGamePlayer->gmplayer.login(pName, pPassword, pGamePlayerProxy);
}


void Proxyupgrade(void *pGamePlayerProxy)
{
    ((GamePlayerProxy *)pGamePlayerProxy)->pGamePlayer->gmplayer.upgrade(((GamePlayerProxy *)pGamePlayerProxy)->pGamePlayer);
}


void DeleteGamePlayerProxy(GamePlayerProxy *pGamePlayerProxy)
{
    if(pGamePlayerProxy->pGamePlayer)
    {
        pGamePlayerProxy->pGamePlayer->DeleteGamePlayer(pGamePlayerProxy->pGamePlayer);
    }
    if(pGamePlayerProxy)
    {
        free(pGamePlayerProxy);
        pGamePlayerProxy = NULL;
    }
    return;
}


GamePlayerProxy *CreateProxy(char *pName)
{
    GamePlayerProxy *pGamePlayerProxy = NULL;


    pGamePlayerProxy = (GamePlayerProxy *)malloc(sizeof(GamePlayerProxy));
    if(!pGamePlayerProxy)
    {
        return NULL;
    }
    memset(pGamePlayerProxy, 0, sizeof(GamePlayerProxy));


    pGamePlayerProxy->pGamePlayer = CreateGamePlayer(
                            (IGamePlayer *)pGamePlayerProxy, pName);  /*创建被代理者*/


    pGamePlayerProxy->DeleteGamePlayerProxy = DeleteGamePlayerProxy;
    pGamePlayerProxy->gmplayer.login = Proxylogin;
    pGamePlayerProxy->gmplayer.killBoss = ProxykillBoss;
    pGamePlayerProxy->gmplayer.upgrade = Proxyupgrade;
    pGamePlayerProxy->gmplayer.DeleteIGamePlayer = pGamePlayerProxy->DeleteGamePlayerProxy;
    return pGamePlayerProxy;
}


/*场景*/
void main()
{
    /*定义一个代理者*/
    IGamePlayer *pPlayProxy = (IGamePlayer *)CreateProxy("zhangsan"); //转换为抽象类， 即场景只依赖于抽象类


    /*开始打游戏，记下时间戳*/
    printf("game start time is : 2014-1-21 9:00\n");


    /*代理登录*/
    pPlayProxy->login("zhangsan", "password", pPlayProxy);


    /*代理打怪*/
    pPlayProxy->killBoss(pPlayProxy);


    /*代理升级*/
    pPlayProxy->upgrade(pPlayProxy);


    /*游戏结束*/
    printf("game end time is :2014-1-21 10:00");


    /*释放资源*/
    pPlayProxy->DeleteIGamePlayer(pPlayProxy);
}