C语言实现《大话设计模式》中的适配器模式例程
#ifndef __ADAPTER_H__#define __ADAPTER_H__#include "rtthread.h"#include "finsh.h"//球员类typedef struct _Player Player;struct _Player{ char *Name; void (*Attack)(void *pPlayer); //进攻 void (*Defense)(void *pPlayer); //防守 void (*Delete)(void *pPlayer);};void PlayerDelete(void *pPlayer){ rt_free(pPlayer);}Player *PlayerCreate(char *Name, rt_size_t Size){ Player *pPlayer = (Player *)rt_malloc(Size); pPlayer->Name = Name; pPlayer->Delete = PlayerDelete; return pPlayer;}//前锋类typedef struct _Forwards Forwards;struct _Forwards{ Player mPlayer;};void ForwardsAttack(void *pForwards){ rt_kprintf("前锋 %s 进攻\n", ((Forwards *)pForwards)->mPlayer.Name);}void ForwardsDefense(void *pForwards){ rt_kprintf("前锋 %s 防守\n", ((Forwards *)pForwards)->mPlayer.Name);}Forwards *ForwardsCreate(char *Name, rt_size_t Size){ Forwards *pForwards = (Forwards *)PlayerCreate(Name, Size); pForwards->mPlayer.Attack = ForwardsAttack; pForwards->mPlayer.Defense = ForwardsDefense; return pForwards;}//中锋类typedef struct _Center Center;struct _Center{ Player mPlayer;};void CenterAttack(void *pCenter){ rt_kprintf("中锋 %s 进攻\n", ((Center *)pCenter)->mPlayer.Name);}void CenterDefense(void *pCenter){ rt_kprintf("中锋 %s 防守\n", ((Center *)pCenter)->mPlayer.Name);}Center *CenterCreate(char *Name, rt_size_t Size){ Center *pCenter = (Center *)PlayerCreate(Name, Size); pCenter->mPlayer.Attack = CenterAttack; pCenter->mPlayer.Defense = CenterDefense; return pCenter;}//后卫类typedef struct _Guards Guards;struct _Guards{ Player mPlayer;};void GuardsAttack(void *pGuards){ rt_kprintf("后卫 %s 进攻\n", ((Guards *)pGuards)->mPlayer.Name);}void GuardsDefense(void *pGuards){ rt_kprintf("后卫 %s 防守\n", ((Guards *)pGuards)->mPlayer.Name);}Guards *GuardsCreate(char *Name, rt_size_t Size){ Guards *pGuards = (Guards *)PlayerCreate(Name, Size); pGuards->mPlayer.Attack = GuardsAttack; pGuards->mPlayer.Defense = GuardsDefense; return pGuards;}//外籍中锋typedef struct _ForeignCenter ForeignCenter;struct _ForeignCenter{ char *Name; void (*JinGong)(void *pForeignCenter); void (*FangShou)(void *pForeignCenter); void (*Delete)(void *pForeignCenter);};void ForeignCenterJinGong(void *pForeignCenter){ rt_kprintf("外籍中锋 %s 进攻\n", ((ForeignCenter *)pForeignCenter)->Name);}void ForeignCenterFangShou(void *pForeignCenter){ rt_kprintf("外籍中锋 %s 防守\n", ((ForeignCenter *)pForeignCenter)->Name);}void ForeignCenterDelete(void *pForeignCenter){ rt_free(pForeignCenter);}ForeignCenter *ForeignCenterCreate(char *Name, rt_size_t Size){ ForeignCenter *pForeignCenter = (ForeignCenter *)rt_malloc(Size); pForeignCenter->Name = Name; pForeignCenter->JinGong = ForeignCenterJinGong; pForeignCenter->FangShou = ForeignCenterFangShou; pForeignCenter->Delete = ForeignCenterDelete; return pForeignCenter;}//翻译者类typedef struct _Translator Translator;struct _Translator{ Player mPlayer; ForeignCenter *pForeignCenter;};void TranslatorAttack(void *pTranslator){ ((Translator *)pTranslator)->pForeignCenter->JinGong(((Translator *)pTranslator)->pForeignCenter);}void TranslatorDefense(void *pTranslator){ ((Translator *)pTranslator)->pForeignCenter->FangShou(((Translator *)pTranslator)->pForeignCenter);}void TranslatorDelete(void *pTranslator){ ForeignCenterDelete(((Translator *)pTranslator)->pForeignCenter); rt_free(pTranslator);}Translator *TranslatorCreate(char *Name, rt_size_t Size){ Translator *pTranslator = (Translator *)PlayerCreate(Name, Size); pTranslator->pForeignCenter = ForeignCenterCreate(Name, sizeof(ForeignCenter)); pTranslator->mPlayer.Name = pTranslator->pForeignCenter->Name; pTranslator->mPlayer.Attack = TranslatorAttack; pTranslator->mPlayer.Defense = TranslatorDefense; pTranslator->mPlayer.Delete = TranslatorDelete; return pTranslator;}#endif#include "Adapter.h"//客户端void Adapter(void){ Player *b = (Player *)ForwardsCreate("巴蒂尔", sizeof(Forwards)); Player *m = (Player *)GuardsCreate("麦克格雷迪", sizeof(Guards)); Player *ym = (Player *)TranslatorCreate("姚明", sizeof(Translator)); b->Attack(b); m->Attack(m); ym->Attack(ym); ym->Defense(ym); b->Delete(b); m->Delete(m); ym->Delete(ym);}FINSH_FUNCTION_EXPORT(Adapter, Adapter Mode);
适配器模式是将不同的接口用接口类进行转换来使用，像例子中的外籍中锋的类跟其它球员的类接口不一样，于是建造了翻译者接口来转换并使用。