407 lines
8.8 KiB
C++
407 lines
8.8 KiB
C++
#include "_Core.h"
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#include "SString.h"
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#include "DateTime.h"
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/************************************************ DateTime ************************************************/
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// 我们的时间起点是 1/1/1970 00:00:00.000 在公历里面1/1/1970是星期四
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#define BASE_YEAR 1970
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// 截止基本年，已过去的闰年数。1969 / 4 - 1969 / 100 + 1969 / 400 = 492 - 19 + 4 = 477
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#define BASE_YEAR_LEAPYEAR_ADJUST (((BASE_YEAR - 1) / 4) - ((BASE_YEAR - 1) / 100) + ((BASE_YEAR - 1) / 400))
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#define BASE_YEAR_DAYOFWEEK_SHIFT 4 // 星期偏移
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// 基本年的秒数
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#define BASE_YEAR_SECONDS 62135596800UL
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const int CummulativeDaysForMonth[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
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#define IS_LEAP_YEAR(y) (((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))
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// 基于基本年的闰年数，不包含当年
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#define NUMBER_OF_LEAP_YEARS(y) ((((y - 1) / 4) - ((y - 1) / 100) + ((y - 1) / 400)) - BASE_YEAR_LEAPYEAR_ADJUST)
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#define NUMBER_OF_YEARS(y) (y - BASE_YEAR)
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#define YEARS_TO_DAYS(y) ((NUMBER_OF_YEARS(y) * 365) + NUMBER_OF_LEAP_YEARS(y))
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#define MONTH_TO_DAYS(y, m) (CummulativeDaysForMonth[m - 1] + ((IS_LEAP_YEAR(y) && (m > 2)) ? 1 : 0))
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DateTime& DateTime::Parse(uint seconds)
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{
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auto& st = *this;
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//if(seconds >= BASE_YEAR_SECONDS) seconds -= BASE_YEAR_SECONDS;
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// 分别计算毫秒、秒、分、时，剩下天数
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uint time = seconds;
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st.Second = time % 60;
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time /= 60;
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st.Minute = time % 60;
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time /= 60;
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st.Hour = time % 24;
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time /= 24;
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if(time) ParseDays(time);
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Ms = 0;
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return st;
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}
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DateTime& DateTime::ParseMs(UInt64 ms)
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{
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Parse(ms / 1000ULL);
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Ms = ms % 1000ULL;
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return *this;
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}
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DateTime& DateTime::ParseDays(uint days)
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{
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// 基本年的一天不一定是星期天，需要偏移BASE_YEAR_DAYOFWEEK_SHIFT
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//DayOfWeek = (days + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
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Year = (ushort)(days / 365);
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if(Year < 136) Year += BASE_YEAR;
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// 按最小每年365天估算，如果不满当年总天数，年份减一
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int ytd = YEARS_TO_DAYS(Year);
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if (ytd > days)
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{
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Year--;
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ytd = YEARS_TO_DAYS(Year);
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}
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// 减去年份的天数
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days -= ytd;
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// 按最大每月31天估算，如果超过当月总天数，月份加一
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Month = (ushort)(days / 31 + 1);
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int mtd = MONTH_TO_DAYS(Year, Month + 1);
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if (days >= mtd) Month++;
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// 计算月份表示的天数
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mtd = MONTH_TO_DAYS(Year, Month);
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// 今年总天数减去月份天数，得到该月第几天
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Day = (ushort)(days - mtd + 1);
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return *this;
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}
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DateTime::DateTime()
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{
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Init();
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}
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DateTime::DateTime(ushort year, byte month, byte day)
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{
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Year = year;
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Month = month;
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Day = day;
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Hour = 0;
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Minute = 0;
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Second = 0;
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Ms = 0;
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}
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DateTime::DateTime(uint seconds)
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{
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//if(seconds == 0)
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// Buffer(&Year, &Ms - &Year + sizeof(Ms)).Clear();
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//else
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Parse(seconds);
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}
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DateTime::DateTime(const DateTime& value)
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{
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*this = value;
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}
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DateTime::DateTime(DateTime&& value)
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{
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// 拷贝对方数据，把对方初始化为默认值
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auto bs = ToArray();
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bs = value.ToArray();
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// 对方反正不用了，就不要浪费时间做初始化啦，反正没有需要释放的资源
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//value.Init();
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}
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void DateTime::Init()
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{
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//Buffer(&Year, &Ms - &Year + sizeof(Ms)).Clear();
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Year = BASE_YEAR;
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Month = 1;
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Day = 1;
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Hour = 0;
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Minute = 0;
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Second = 0;
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Ms = 0;
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}
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Buffer DateTime::ToArray()
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{
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return Buffer(&Year, &Ms - &Year + sizeof(Ms));
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}
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// 重载等号运算符
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DateTime& DateTime::operator=(uint seconds)
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{
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Parse(seconds);
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return *this;
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}
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DateTime& DateTime::operator=(const DateTime& value)
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{
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// 避免自己拷贝自己
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if(this != &value)
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{
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// 拷贝对方数据
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auto bs = ToArray();
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bs = ((DateTime&)value).ToArray();
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}
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return *this;
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}
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uint DateTime::TotalDays() const
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{
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return YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
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}
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uint DateTime::TotalSeconds() const
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{
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uint s = TotalDays() * 24 + Hour;
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s = s * 60 + Minute;
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s = s * 60 + Second;
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return s;
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}
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UInt64 DateTime::TotalMs() const
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{
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UInt64 sec = (UInt64)TotalSeconds();
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return sec * 1000UL + (UInt64)Ms;
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}
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// 获取星期
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byte DateTime::DayOfWeek() const
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{
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uint days = YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
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return (days + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
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}
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// 取时间日期的日期部分
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DateTime DateTime::Date() const
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{
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return DateTime(Year, Month, Day);
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}
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DateTime DateTime::AddYears(int value) const
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{
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auto dt = *this;
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dt.Year += value;
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return dt;
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}
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DateTime DateTime::AddMonths(int value) const
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{
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value += Month;
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int ys = value / 12;
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int ms = value % 12;
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// 可能上下溢出，需要修正
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if(ms <= 0)
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{
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ys--;
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ms += 12;
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}
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auto dt = *this;
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dt.Year += ys;
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dt.Month = ms;
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return dt;
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}
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DateTime DateTime::AddDays(int value) const
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{
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DateTime dt;
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dt.ParseDays(TotalDays() + value);
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return dt;
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}
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DateTime DateTime::AddHours(int value) const
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{
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/*value += Hour;
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int days = value / 24;
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int hour = value % 24;
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// 可能上下溢出，需要修正
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if(hour < 0)
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{
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days--;
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hour += 24;
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}
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auto dt = AddDays(days);
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dt.Hour = hour;
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return dt;*/
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return AddSeconds(value * 3600);
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}
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DateTime DateTime::AddMinutes(int value) const
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{
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/*value += Minute;
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int hours = value / 60;
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int mins = value % 60;
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// 可能上下溢出，需要修正
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if(mins < 0)
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{
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hours--;
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mins += 60;
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}
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auto dt = AddHours(hours);
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dt.Minute = mins;
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return dt;*/
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return AddSeconds(value * 60);
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}
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DateTime DateTime::AddSeconds(int value) const
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{
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DateTime dt;
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dt.Parse(TotalSeconds() + value);
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return dt;
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}
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DateTime DateTime::AddMilliseconds(Int64 value) const
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{
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DateTime dt;
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dt.ParseMs(TotalMs() + value);
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return dt;
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}
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int DateTime::CompareTo(const DateTime& value) const
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{
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int n = (int)Year - value.Year;
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if(n) return n;
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n = (int)Month - value.Month;
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if(n) return n;
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n = (int)Day - value.Day;
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if(n) return n;
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n = (int)Hour - value.Hour;
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if(n) return n;
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n = (int)Minute - value.Minute;
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if(n) return n;
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n = (int)Second - value.Second;
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if(n) return n;
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n = (int)Ms - value.Ms;
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if(n) return n;
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return 0;
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}
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bool operator== (const DateTime& left, const DateTime& right) { return left.CompareTo(right) == 0; }
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bool operator!= (const DateTime& left, const DateTime& right) { return left.CompareTo(right) != 0; }
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bool operator> (const DateTime& left, const DateTime& right) { return left.CompareTo(right) > 0; }
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bool operator< (const DateTime& left, const DateTime& right) { return left.CompareTo(right) < 0; }
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bool operator>= (const DateTime& left, const DateTime& right) { return left.CompareTo(right) >= 0; }
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bool operator<= (const DateTime& left, const DateTime& right) { return left.CompareTo(right) <= 0; }
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String& DateTime::ToStr(String& str) const
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{
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// F长全部 yyyy-MM-dd HH:mm:ss
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/*str.Concat(Year, 10, 4);
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str += '-';
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str.Concat(Month, 10, 2);
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str += '-';
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str.Concat(Day, 10, 2);
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str += ' ';
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str.Concat(Hour, 10, 2);
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str += ':';
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str.Concat(Minute, 10, 2);
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str += ':';
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str.Concat(Second, 10, 2);*/
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//str = str + Year + '-' + Month + '-' + Day + ' ' + Hour + ':' + Minute + ':' + Second;
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str = str + Year + '-';
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if(Month < 10) str += '0';
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str = str + Month + '-';
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if(Day < 10) str += '0';
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str = str + Day + ' ';
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if(Hour < 10) str += '0';
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str = str + Hour + ':';
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if(Minute < 10) str += '0';
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str = str + Minute + ':';
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if(Second < 10) str += '0';
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str = str + Second;
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/*char cs[20];
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sprintf(cs, "%04d-%02d-%02d %02d:%02d:%02d", Year, Month, Day, Hour, Minute, Second);
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str += cs;*/
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return str;
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}
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// 默认格式化时间为yyyy-MM-dd HH:mm:ss
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/*
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d短日期 M/d/yy
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D长日期 yyyy-MM-dd
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t短时间 mm:ss
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T长时间 HH:mm:ss
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f短全部 M/d/yy HH:mm
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F长全部 yyyy-MM-dd HH:mm:ss
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*/
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cstring DateTime::GetString(byte kind, char* str)
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{
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//assert_param(str);
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//if(!str) str = _Str;
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auto& st = *this;
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switch(kind)
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{
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case 'd':
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sprintf(str, "%d/%d/%02d", st.Month, st.Day, st.Year % 100);
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break;
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case 'D':
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sprintf(str, "%04d-%02d-%02d", st.Year, st.Month, st.Day);
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break;
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case 't':
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sprintf(str, "%02d:%02d", st.Hour, st.Minute);
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break;
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case 'T':
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sprintf(str, "%02d:%02d:%02d", st.Hour, st.Minute, st.Second);
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break;
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case 'f':
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sprintf(str, "%d/%d/%02d %02d:%02d", st.Month, st.Day, st.Year % 100, st.Hour, st.Minute);
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break;
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case 'F':
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sprintf(str, "%04d-%02d-%02d %02d:%02d:%02d", st.Year, st.Month, st.Day, st.Hour, st.Minute, st.Second);
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break;
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default:
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//assert_param(false);
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break;
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}
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return str;
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}
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