C++11应用：规范日志打印

#pragma once

#include <chrono>

static std::string getTimeStr()
{
    std::chrono::time_point<std::chrono::system_clock,std::chrono::milliseconds> tpNow = std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::system_clock::now());
    auto tmpNow=std::chrono::duration_cast<std::chrono::milliseconds>(tpNow.time_since_epoch());
    uint64_t milli = tmpNow.count();
    milli += (uint64_t)8*60*60*1000;//add to beijing time zone.
    auto mTime = std::chrono::milliseconds(milli);
    auto tp=std::chrono::time_point<std::chrono::system_clock,std::chrono::milliseconds>(mTime);
    auto tt = std::chrono::system_clock::to_time_t(tp);
    std::tm* info = std::gmtime(&tt);

    char tmp[27] = {0};
    sprintf(tmp, "%04d-%02d-%02d %02d:%02d:%02d.%03ld", info->tm_year+1900, info->tm_mon+1, info->tm_mday, info->tm_hour, info->tm_min, info->tm_sec, milli%1000);
    return tmp;
} 

#define DEBUG_FLAG 

#ifdef DEBUG_FLAG
	#define MY_LOGD(format, ...) {printf("%s: D/%s[%s]: ", getTimeStr().c_str(), basename(__FILE__), __func__);printf(format, ##__VA_ARGS__);printf("\n");} 
#else
	#define MY_LOGD(format, ...)
#endif

#define MY_LOGE(format, arg...) {printf("%s: E/%s[%s]: ", getTimeStr().c_str(), basename(__FILE__), __func__);if(strlen(format)>0){printf(format, ##arg);}printf("\n");}

#define FUNCTION_NAME               MY_LOGD(" ");
#define FUNCTION_IN                 MY_LOGD("+")
#define FUNCTION_OUT                MY_LOGD("-")