C语言技巧

// 宏定义,判断是否OK,否则输出错误对应的函数和行数
#define ATTEMPT(xFuncToTry) {if(xFuncToTry != MXD_OK) \
                            {MXD_DBG_ERROR("ATTEMPT failed at %s:%u\n",__FUNCTION__,__LINE__); \
                            return MXD_FAIL;}}

// printf 宏定义
#define IIC_DEBUG(...)              printf(__VA_ARGS__)