boost::posix_time::ptime类型的时间取整

时间取整(向前,向后)

#include <boost/date_time/posix_time/posix_time.hpp>

typedef boost::posix_time::ptime BoostTM;

// 时间向后取整
BoostTM roundUpToNextHour(const BoostTM& time)
{
    // 如果分钟或秒数不为零，则向上取整到下一个小时
    if (time.time_of_day().minutes() != 0 || time.time_of_day().seconds() != 0)
    {
        BoostTM rounded_up;
        rounded_up = time + boost::posix_time::hours(1);
        rounded_up = boost::posix_time::ptime(rounded_up.date(), boost::posix_time::hours(rounded_up.time_of_day().hours()));
        return rounded_up;
    }
    else
    {
        // 如果已经是整点，则不进行取整
        return time;
    }
}

// 时间向前取整
BoostTM roundDownToPrevHour(const BoostTM& time)
{
    // 如果分钟或秒数不为零，则向下取整到当前小时
    if (time.time_of_day().minutes() != 0 || time.time_of_day().seconds() != 0)
    {
        BoostTM rounded_down;
        rounded_down = boost::posix_time::ptime(time.date(), boost::posix_time::hours(time.time_of_day().hours()));
        return rounded_down;

    }
    else
    {
        // 如果已经是整点，则不进行取整
        return time;
    }
}