#include <stdio.h>#define lU_DEBUG_PREFIX "##########"#define LU_DEBUG_CMD 0x01#define LU_DEBUG_DATA 0x02#define LU_DEBUG_ERROR 0x04#define LU_PRINTF_cmd(msg...) do{if(g_lu_debugs_level & LU_DEBUG_CMD)printf(lU_DEBUG_PREFIX msg);}while(0)#define LU_PRINTF_data(msg...) do{if(g_lu_debugs_level & LU_DEBUG_DATA)printf(lU_DEBUG_PREFIX msg);}while(0)#define LU_PRINTF_error(msg...) do{if(g_lu_debugs_level & LU_DEBUG_ERROR)printf(lU_DEBUG_PREFIX msg);}while(0)#define lu_printf(level, msg...) LU_PRINTF_##level(msg)#define lu_printf2(...) printf(__VA_ARGS__)#define lu_printf3(...) lu_printf(__VA_ARGS__)static int lu_printf4_format(int prio, const char *fmt, ...);#define lu_printf4(prio, fmt...) lu_printf4_format(prio, fmt)int g_lu_debugs_level; //控制打印等级的全局开关//lu_printf 类似内核的分等级打印宏，根据g_lu_debugs_level和输入的第一个标号名来决定该句打印是否输出。//lu_printf3 等同于 lu_printf//lu_printf2 等同于 printf//lu_printf4 等同于 lu_printf4_format，作用是把输入的第一个整型参数用<val>的格式打印出来int main(int argc, char *argv[]){    g_lu_debugs_level |= LU_DEBUG_CMD | LU_DEBUG_DATA | LU_DEBUG_ERROR;    printf("g_lu_debugs_level = %p\n", g_lu_debugs_level);    lu_printf(cmd,"this is cmd\n");    lu_printf(data,"this is data\n");    lu_printf(error,"this is error\n");    g_lu_debugs_level &= ~(LU_DEBUG_CMD | LU_DEBUG_DATA);    printf("g_lu_debugs_level = %p\n", g_lu_debugs_level);    lu_printf(cmd,"this is cmd\n");    lu_printf(data,"this is data\n");    lu_printf(error,"this is error\n");    lu_printf2("aa%d,%s,%dbbbbb\n", 20, "eeeeeee", 100);    g_lu_debugs_level |= LU_DEBUG_CMD | LU_DEBUG_DATA | LU_DEBUG_ERROR;    printf("g_lu_debugs_level = %p\n", g_lu_debugs_level);    lu_printf3(cmd,"this is cmd \n");    lu_printf3(data,"this is data\n");    lu_printf3(error,"this is error\n");    lu_printf4(0,"luther %s ,%d ,%d\n", "gliethttp", 1, 2);    return 0;}#include <stdarg.h>static int lu_printf4_format(int prio, const char *fmt, ...){#define LOG_BUF_SIZE (4096)    va_list ap;    char buf[LOG_BUF_SIZE];    va_start(ap, fmt);    vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);    va_end(ap);    printf("<%d>: %s", prio, buf);    printf("------------------------\n");    printf(buf);}#define ENTER() LOGD("enter into %s", __FUNCTION__)#define LOGD(...) ((void)LOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__))#define LOG(priority, tag, ...) \    LOG_PRI(ANDROID_##priority, tag, __VA_ARGS__)#define LOG_PRI(priority, tag, ...) \    android_printLog(priority, tag, __VA_ARGS__)#define android_printLog(prio, tag, fmt...) \    __android_log_print(prio, tag, fmt)