引言

       在代码书写的过程中，为了对函数进行封装，一些简单的诸如“等于”，“打印log”的代码都会用宏定义来书写，在提高抽象层次的基础上，也简化了代码的书写。接下来是一些比较常用的宏的调用，记录下以供下次来用此方法来进行代码的优化。

正文

       试验代码如下

#define IE_ELEMENT_PRESENT(ie, element) (ie->tOptFlags.element##Present)
#define IE_ELEMENT(ie, element) (ie->element)
#define IE_ELEMENT_POINTER(ie, element) (&(ie->element))
#define IE_UNION_T(ie) (ie->t)
#define IE_UNION_ELEMENT(ie, element) (ie->u.element)
#define IE_UNION_ELEMENT_POINTER(ie, element) (&(ie->u.element))

#define DECLARE_SAVE_FUNC(ie_element, ie_element_type, ie_saved_type)\
    VOID Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        *ie_element##_saved = *ie_element;\
    }

#define DECLARE_SAVE_FUNC_WITH_CHECK(ie_element, ie_max_value, ie_element_type, ie_saved_type)\
    VOID Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        CHECK_ARRAY_BOUND_RETURN(*ie_element, ie_max_value, #ie_element, Save_##ie_element);\
        *ie_element##_saved = *ie_element;\
    }

#define DECLARE_SAVE_FUNC_ARRAY_INDEX_WITH_CHECK(ie_element, ie_array, ie_max_value, ie_element_type, ie_saved_type)\
    VOID Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        CHECK_ARRAY_BOUND_RETURN(*ie_element, ie_max_value, #ie_array, Save_##ie_element);\
        *ie_element##_saved = ie_array[*ie_element];\
    }

#define DECLARE_SAVE_FUNC_WITH_CHECK_RETURN_FAILURE(ie_element, ie_max_value, ie_element_type, ie_saved_type)\
    WORD32 Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        CHECK_ARRAY_BOUND(*ie_element, ie_max_value, #ie_element, Save_##ie_element);\
        *ie_element##_saved = *ie_element;\
        return SUCCESS;\
    }

#define DECLARE_SAVE_FUNC_ARRAY_INDEX_WITH_CHECK_RETURN_FAILURE(ie_element, ie_array, ie_max_value, ie_element_type, ie_saved_type)\
    WORD32 Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        CHECK_ARRAY_BOUND(*ie_element, ie_max_value, #ie_array, Save_##ie_element);\
        *ie_element##_saved = ie_array[*ie_element];\
        return SUCCESS;\
    }

#define DECLARE_SAVE_FUNC_WITH_CHECK_RANGE_RETURN_FAILURE(ie_element, ie_max_value, ie_min_value, ie_element_type, ie_saved_type)\
    WORD32 Save_##ie_element(const ie_element_type * ie_element, ie_saved_type * ie_element##_saved)\
    {\
        CHECK_VALUE_OUT_RANGE_RETURN_FAILURE(*ie_element, ie_max_value, ie_min_value, Save_##ie_element);\
        *ie_element##_saved = *ie_element;\
        return SUCCESS;\
    }

#define SAVE_IE_SIMPLE(ie, ie_element, ie_saved)\
    do{\
        if (IE_PRESENT == IE_ELEMENT_PRESENT(ie, ie_element))\
        {\
            Save_##ie_element(IE_ELEMENT_POINTER(ie, ie_element), ie_saved);\
        }\
    } while(0);

#define SAVE_IE_DEFAULT(ie, ie_element, ie_saved, defaultVal)\
    do{\
        if (IE_PRESENT == IE_ELEMENT_PRESENT(ie, ie_element))\
        {\
            Save_##ie_element(IE_ELEMENT_POINTER(ie, ie_element), ie_saved);\
        }\
        else\
        {\
            *ie_saved = defaultVal;\
        }\
    } while(0);

#define CHECK_SAVE_IE_RESULT(ie_element, save_func)\
    do{\
        if(SUCCESS != save_func)\
        {\
            UE_LOG_ERR(g_dwUlMacLogId, "%s:save %s failure!", #save_func, #ie_element);\
        }\
    }while(0);

#define CHECK_FUNCTION_RESULT(func)\
    do{\
        if(SUCCESS != func)\
        {\
            UE_LOG_ERR(g_dwUlMacLogId, "%s: %s failure!", __FUNCTION__, #func);\
        }\
    }while(0);

#define CHECK_FUNCTION_RESULT_RETURN_FAILURE(func)\
    do{\
        if(SUCCESS != func)\
        {\
            UE_LOG_ERR(g_dwUlMacLogId, "%s: %s failure!", __FUNCTION__, #func);\
            return FAILURE;\
        }\
    }while(0);

#define CHECK_FUNCTION_RESULT_RETURN_FAILURE_STAT(func, statVar)\
    do{\
        if(SUCCESS != func)\
        {\
            (statVar)++;\
            UE_LOG_ERR(g_dwUlMacLogId, "%s: %s failure!", __FUNCTION__, #func);\
            return FAILURE;\
        }\
    }while(0);

#define SAVE_IE(ie, ie_element, save_func, ...)\
    do{\
        if ( IE_PRESENT == IE_ELEMENT_PRESENT(ie, ie_element) )\
        {\
            save_func(IE_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__);\
        }\
    } while(0);

#define SAVE_IE_WITH_CHECK(ie, ie_element, save_func, ...)\
    do{\
        if ( IE_PRESENT == IE_ELEMENT_PRESENT(ie, ie_element) )\
        {\
            CHECK_SAVE_IE_RESULT(ie_element, (save_func(IE_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__)));\
        }\
    }while(0);

#define CHECK_SAVE_IE_RESULT_RETURN_FAILURE(ie_element, save_func)\
    do{\
        if(SUCCESS != save_func)\
        {\
            UE_LOG_ERR(g_dwUlMacLogId, "%s:save %s failure!", #save_func, #ie_element);\
            return FAILURE;\
        }\
    }while(0);

#define SAVE_IE_WITH_CHECK_RETURN_FAILURE(ie, ie_element, save_func, ...)\
    do{\
        if ( IE_PRESENT == IE_ELEMENT_PRESENT(ie, ie_element) )\
        {\
            CHECK_SAVE_IE_RESULT_RETURN_FAILURE(ie_element, (save_func(IE_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__)));\
        }\
    }while(0);

#define CHECK_IE_UNION_T_OUT_RANGE_RETURN(ie, ie_union_t_max, ie_union_t_min)\
    do{\
        CHECK_VALUE_OUT_RANGE_RETURN(IE_UNION_T(ie), ie_union_t_max, ie_union_t_min, __FUNCTION__);\
    } while(0);

#define CHECK_IE_UNION_T_OUT_RANGE_RETURN_FAILURE(ie, ie_union_t_max, ie_union_t_min)\
    do{\
        CHECK_VALUE_OUT_RANGE_RETURN_FAILURE(IE_UNION_T(ie), ie_union_t_max, ie_union_t_min, __FUNCTION__);\
    } while(0);

#define SAVE_IE_UNION_SIMPLE(ie, ie_union_t, ie_element, ie_saved)\
    do{\
        if (ie_union_t == IE_UNION_T(ie))\
        {\
            Save_##ie_element(IE_UNION_ELEMENT_POINTER(ie, ie_element), ie_saved);\
        }\
    } while(0);

#define SAVE_IE_UNION(ie, ie_union_t, ie_element, save_func, ...)\
    do{\
        if ( ie_union_t == IE_UNION_T(ie) )\
        {\
            save_func(IE_UNION_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__);\
        }\
    } while(0);

#define SAVE_IE_UNION_WITH_CHECK(ie, ie_union_t, ie_element, save_func, ...)\
    do{\
        if ( ie_union_t == IE_UNION_T(ie) )\
        {\
            CHECK_SAVE_IE_RESULT(ie_element, (save_func(IE_UNION_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__)));\
        }\
    } while(0);

#define SAVE_IE_UNION_WITH_CHECK_RETURN_FAILURE(ie, ie_union_t, ie_element, save_func, ...)\
    do{\
        if ( ie_union_t == IE_UNION_T(ie) )\
        {\
            CHECK_SAVE_IE_RESULT_RETURN_FAILURE(ie_element, (save_func(IE_UNION_ELEMENT_POINTER(ie, ie_element), ##__VA_ARGS__)));\
        }\
    } while(0);

#define SAVE_IE_UNION_SIMPLE_WITH_CHECK_RETURN_FAILURE(ie, ie_union_t, ie_element, ie_saved)\
    do{\
        if ( ie_union_t == IE_UNION_T(ie) )\
        {\
            CHECK_SAVE_IE_RESULT_RETURN_FAILURE(ie_element, (Save_##ie_element(IE_UNION_ELEMENT_POINTER(ie, ie_element), ie_saved)));\
        }\
    } while(0);