C++ 简易时间类

.h file

#ifndef LIBFRAME_DATETIME_H_

#define LIBFRAME_DATETIME_H_

#include <stdint.h>

#include "platform/platform.h"class CDateTime

{

public:

    struct Time

    {

        int16_t year, month, day, hour, minite, second, milliseconds, dayOfWeek;

    };

    enum

    {

        enmDateTime_MsPerSec = ,

        enmDateTime_SecPerMin = ,

        enmDateTime_MinPerHour = ,

        enmDateTime_SecPerHour = enmDateTime_SecPerMin * enmDateTime_MinPerHour,

        enmDateTime_HourPerDay = ,

        enmDateTime_SecPerDay = enmDateTime_SecPerHour * enmDateTime_HourPerDay,

        enmDateTime_DayPerWeek = ,

        enmDateTime_SecPerWeek = enmDateTime_SecPerDay * enmDateTime_DayPerWeek,

    };

    enum

    {

        // 2017-1-1 0:0:0

        enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss = ,

        // 2017-1-1 0:0:0:0

        enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_ms = ,

        // 2017-1-1 0:0:0 6

        enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_wday = ,

        // 2017-1-1 0:0:0:0 6

        enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_ms_wday = ,

    };

public:

    CDateTime(uint16_t year = , uint16_t month = , uint16_t day = , uint16_t hour = , uint16_t minite = , uint16_t second = , uint16_t millisecond = );

    CDateTime(int64_t seconds);

    ~CDateTime();

    static CDateTime CurrentLocalTime();

    static CDateTime CurrentSystemTime();

    static bool IsLeapYear(int16_t year);

    static int16_t GetMonthDays(int16_t year, int16_t month);

    const CDateTime::Time &GetTime() const;

    int64_t Seconds() const;

    int64_t MilliSeconds() const;

    int32_t ToString(char buf[], int32_t maxBufLen, int32_t format = enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss);

    CDateTime DayBeginTime() const;

    CDateTime WeekBeginTime() const;

    CDateTime MonthBeginTime() const;

    CDateTime LastMonthBeginTime() const;

    CDateTime NextMonthBeginTime() const;

    CDateTime YearBeginTime() const;

    bool InSameMonth(int64_t timestamp, int32_t offset = );

    bool InSameWeek(int64_t timestamp, int32_t offset = );

    bool InSameDay(int64_t timestamp, int32_t offset = );

private:

    void FetchLoaclTime();

    void FetchSystemTime();

    void SetTime(const CDateTime::Time &time);

    void SetSeconds(int64_t seconds);

    void SetMilliSeconds(int64_t milliseconds);

    int64_t MakeTime(uint16_t year = , uint16_t month = , uint16_t day = , uint16_t hour = , uint16_t minite = , uint16_t second = );

private:

    Time m_time;

    int64_t m_seconds;        // seconds

    int64_t m_milliseconds;    // milliseconds

};

#endif

.cpp file

#include <ctime>

#include "datetime.h"

CDateTime::CDateTime(uint16_t year /*= 0*/, uint16_t month /*= 0*/, uint16_t day /*= 0*/, uint16_t hour /*= 0*/, uint16_t minite /*= 0*/, uint16_t second /*= 0*/, uint16_t millisecond /*= 0*/)

{

    m_time.year = year;

    m_time.month = month;

    m_time.day = day;

    m_time.hour = hour;

    m_time.minite = minite;

    m_time.second = second;

    m_time.milliseconds = millisecond;

    m_seconds = MakeTime(m_time.year, m_time.month, m_time.day, m_time.hour, m_time.minite, m_time.second);

    struct tm *ptm = localtime(&m_seconds);

    m_time.dayOfWeek = ptm->tm_wday;

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

}

CDateTime::CDateTime(int64_t seconds)

{

    struct tm *ptm = localtime(&seconds);

    m_time.year = ptm->tm_year + ;

    m_time.month = ptm->tm_mon + ;

    m_time.day = ptm->tm_mday;

    m_time.hour = ptm->tm_hour;

    m_time.minite = ptm->tm_min;

    m_time.second = ptm->tm_sec;

    m_time.milliseconds = ;

    m_time.dayOfWeek = ptm->tm_wday;

    m_seconds = seconds;

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

}

CDateTime::~CDateTime()

{

}

CDateTime CDateTime::CurrentLocalTime()

{

    static CDateTime localTime;

    localTime.FetchLoaclTime();

    return localTime;

}

CDateTime CDateTime::CurrentSystemTime()

{

    static CDateTime systemTime;

    systemTime.FetchSystemTime();

    return systemTime;

}

bool CDateTime::IsLeapYear(int16_t year)

{

    return (year %  == ) || (year %  !=  && year %  == );

}

int16_t CDateTime::GetMonthDays(int16_t year, int16_t month)

{

    static int16_t common_year_month_days[] = { , , , , , , , , , , , ,  };

    static int16_t leap_year_month_days[] = { , , , , , , , , , , , ,  };

    if (month <  || month > )

    {

        month = ;

    }

    if (IsLeapYear(year))

    {

        return leap_year_month_days[month];

    }

    else

    {

        return common_year_month_days[month];

    }

}

int64_t CDateTime::MakeTime(uint16_t year /*= 0*/, uint16_t month /*= 0*/, uint16_t day /*= 0*/, uint16_t hour /*= 0*/, uint16_t minite /*= 0*/, uint16_t second /*= 0*/)

{

    struct tm st = {  };

    if (year < )

    {

        year = ;

    }

    st.tm_year = year - ;

    st.tm_mon = month - ;

    st.tm_mday = day;

    st.tm_hour = hour;

    st.tm_min = minite;

    st.tm_sec = second;

    int64_t seconds = mktime(&st);

    if (seconds < )

    {

        seconds = ;

    }

    return seconds;

}

void CDateTime::FetchLoaclTime()

{

#ifdef OS_WINDOWS

    static SYSTEMTIME sysTime;

    GetLocalTime(&sysTime);

    m_time.year = sysTime.wYear;

    m_time.month = sysTime.wMonth;

    m_time.day = sysTime.wDay;

    m_time.hour = sysTime.wHour;

    m_time.minite = sysTime.wMinute;

    m_time.second = sysTime.wSecond;

    m_time.milliseconds = sysTime.wMilliseconds;

    m_time.dayOfWeek = sysTime.wDayOfWeek;

    m_seconds = MakeTime(m_time.year, m_time.month, m_time.day, m_time.hour, m_time.minite, m_time.second);

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

#endif // OS_WINDOWS

#ifdef OS_LINUX

    static struct timeb tp;

    ftime(&tp);

    struct tm *ptm = localtime(&tp.time);

    m_time.year = ptm->tm_year + ;

    m_time.month = ptm->tm_mon + ;

    m_time.day = ptm->tm_mday;

    m_time.hour = ptm->tm_hour;

    m_time.minite = ptm->tm_min;

    m_time.second = ptm->tm_sec;

    m_time.milliseconds = tp.millitm;

    m_time.dayOfWeek = ptm->tm_wday;

    m_seconds = tp.time;

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

#endif // OS_LINUX

}

void CDateTime::FetchSystemTime()

{

#ifdef OS_WINDOWS

    static SYSTEMTIME sysTime;

    GetSystemTime(&sysTime);

    m_time.year = sysTime.wYear;

    m_time.month = sysTime.wMonth;

    m_time.day = sysTime.wDay;

    m_time.hour = sysTime.wHour;

    m_time.minite = sysTime.wMinute;

    m_time.second = sysTime.wSecond;

    m_time.milliseconds = sysTime.wMilliseconds;

    m_time.dayOfWeek = sysTime.wDayOfWeek;

    m_seconds = MakeTime(m_time.year, m_time.month, m_time.day, m_time.hour, m_time.minite, m_time.second);

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

#endif // OS_WINDOWS

#ifdef OS_LINUX

    static struct timeb tp;

    ftime(&tp);

    struct tm *ptm = gmtime(&tp.time);

    m_time.year = ptm->tm_year + ;

    m_time.month = ptm->tm_mon + ;

    m_time.day = ptm->tm_mday;

    m_time.hour = ptm->tm_hour;

    m_time.minite = ptm->tm_min;

    m_time.second = ptm->tm_sec;

    m_time.milliseconds = tp.millitm;

    m_time.dayOfWeek = ptm->tm_wday;

    m_seconds = tp.time;

    m_milliseconds = m_seconds * enmDateTime_MsPerSec + m_time.milliseconds;

#endif // OS_LINUX

}

void CDateTime::SetTime(const CDateTime::Time &time)

{

    m_time = time;

}

void CDateTime::SetSeconds(int64_t seconds)

{

    m_seconds = seconds;

}

void CDateTime::SetMilliSeconds(int64_t milliseconds)

{

    m_milliseconds = milliseconds;

}

const CDateTime::Time & CDateTime::GetTime() const

{

    return m_time;

}

int64_t CDateTime::Seconds() const

{

    return m_seconds;

}

int64_t CDateTime::MilliSeconds() const

{

    return m_milliseconds;

}

int32_t CDateTime::ToString(char buf[], int32_t maxBufLen, int32_t format /*= enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss*/)

{

    const CDateTime::Time &time = GetTime();

    switch (format)

    {

    case enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss:

        return sprintf(buf, maxBufLen, "%04d-%02d-%02d %02d:%02d:%02d", time.year, time.month, time.day, time.hour, time.minite, time.second);

    case enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_ms:

        return sprintf(buf, maxBufLen, "%04d-%02d-%02d %02d:%02d:%02d:%03d", time.year, time.month, time.day, time.hour, time.minite, time.second, time.milliseconds);

    case enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_wday:

        return sprintf(buf, maxBufLen, "%04d-%02d-%02d %02d:%02d:%02d %d", time.year, time.month, time.day, time.hour, time.minite, time.second, time.dayOfWeek);

    case enmDateTimeToStr__yyyy_MM_dd_hh_mm_ss_ms_wday:

        return sprintf(buf, maxBufLen, "%04d-%02d-%02d %02d:%02d:%02d:%03d %d", time.year, time.month, time.day, time.hour, time.minite, time.second, time.milliseconds, time.dayOfWeek);

    default:

        return sprintf(buf, maxBufLen, "%04d-%02d-%02d %02d:%02d:%02d", time.year, time.month, time.day, time.hour, time.minite, time.second);

    }

}

CDateTime CDateTime::DayBeginTime() const

{

    CDateTime dayBeginTime;

    Time time = GetTime();

    time.hour = ;

    time.minite = ;

    time.second = ;

    time.milliseconds = ;

    dayBeginTime.SetTime(time);

    dayBeginTime.SetSeconds(m_seconds - GetTime().hour * enmDateTime_SecPerHour - GetTime().minite * enmDateTime_SecPerMin - GetTime().second);

    dayBeginTime.SetMilliSeconds(dayBeginTime.Seconds() * enmDateTime_MsPerSec);

    return dayBeginTime;

}

CDateTime CDateTime::WeekBeginTime() const

{

    CDateTime weekBeginTime;

    Time time = GetTime();

    time.dayOfWeek = ;

    time.day -= (GetTime().dayOfWeek - );

    time.hour = ;

    time.minite = ;

    time.second = ;

    time.milliseconds = ;

    weekBeginTime.SetTime(time);

    weekBeginTime.SetSeconds(m_seconds - (GetTime().dayOfWeek - ) * enmDateTime_SecPerDay - GetTime().hour * enmDateTime_SecPerHour - GetTime().minite * enmDateTime_SecPerMin - GetTime().second);

    weekBeginTime.SetMilliSeconds(weekBeginTime.Seconds() * enmDateTime_MsPerSec);

    return weekBeginTime;

}

CDateTime CDateTime::MonthBeginTime() const

{

    CDateTime monthBeginTime;

    Time time = GetTime();

    int16_t wdayOffset = (GetTime().day - ) % enmDateTime_DayPerWeek;

    time.dayOfWeek = time.dayOfWeek > wdayOffset ? time.dayOfWeek - wdayOffset : time.dayOfWeek + enmDateTime_DayPerWeek - wdayOffset;

    time.day -= (GetTime().day - );

    time.hour = ;

    time.minite = ;

    time.second = ;

    time.milliseconds = ;

    monthBeginTime.SetTime(time);

    monthBeginTime.SetSeconds(m_seconds - (GetTime().day - ) * enmDateTime_SecPerDay - GetTime().hour * enmDateTime_SecPerMin * enmDateTime_MinPerHour - GetTime().minite * enmDateTime_SecPerMin - GetTime().second);

    monthBeginTime.SetMilliSeconds(monthBeginTime.Seconds() * enmDateTime_MsPerSec);

    return monthBeginTime;

}

LibFrame::CDateTime CDateTime::LastMonthBeginTime() const

{

    return CDateTime(MonthBeginTime().Seconds() - ).MonthBeginTime();

}

LibFrame::CDateTime CDateTime::NextMonthBeginTime() const

{

    return CDateTime(MonthBeginTime().Seconds() + GetMonthDays(GetTime().year, GetTime().month) * enmDateTime_SecPerDay + ).MonthBeginTime();

}

LibFrame::CDateTime CDateTime::YearBeginTime() const

{

    return CDateTime(GetTime().year, , );

}

bool CDateTime::InSameMonth(int64_t timestamp, int32_t offset /*= 0*/)

{

    int64_t thisMonthDemarcationPoint = MonthBeginTime().Seconds() + offset;

    return (timestamp < thisMonthDemarcationPoint + offset && thisMonthDemarcationPoint + offset < Seconds())

        || (timestamp < LastMonthBeginTime().Seconds() + offset)

        || (timestamp > NextMonthBeginTime().Seconds() + offset);

}

bool CDateTime::InSameWeek(int64_t timestamp, int32_t offset /*= 0*/)

{

    int64_t thisWeekDemarcationPoint = WeekBeginTime().Seconds() + offset;

    return (timestamp < thisWeekDemarcationPoint && thisWeekDemarcationPoint < Seconds())

        || (timestamp < thisWeekDemarcationPoint - enmDateTime_SecPerWeek)

        || (timestamp > thisWeekDemarcationPoint + enmDateTime_SecPerWeek);

}

bool CDateTime::InSameDay(int64_t timestamp, int32_t offset /*= 0*/)

{

    int64_t todayDemarcationPoint = Seconds() + offset;

    return (timestamp < todayDemarcationPoint && todayDemarcationPoint < Seconds())

        || (timestamp < todayDemarcationPoint - enmDateTime_SecPerDay)

        || (timestamp > todayDemarcationPoint + enmDateTime_SecPerDay);

}

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