396 lines
8.8 KiB
C++
396 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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#if defined(__CC_ARM)
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#include <time.h>
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#else
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#include <ctime>
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#endif
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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()
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{
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Init();
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}
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DateTime::DateTime(int year, int month, int day)
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{
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if(year < BASE_YEAR) year = BASE_YEAR;
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if(month < 1 || month > 12) month = 1;
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if(day < 1 || day > 31) day = 1;
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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(int seconds)
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{
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Parse(seconds);
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Ms = 0;
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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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ToArray() = 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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DateTime& DateTime::Parse(int 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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int 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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ParseDays(time);
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return st;
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}
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DateTime& DateTime::ParseMs(Int64 ms)
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{
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Parse((int)(ms / 1000LL));
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Ms = ms % 1000LL;
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return *this;
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}
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DateTime& DateTime::ParseDays(int 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 = (short)(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 = (byte)(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 = (byte)(days - mtd + 1);
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return *this;
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}
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Buffer DateTime::ToArray()
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{
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//return Buffer(&Year, (int)&Ms - (int)&Year + sizeof(Ms));
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return Buffer(this, sizeof(this[0]));
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}
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const Buffer DateTime::ToArray() const
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{
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//return Buffer((void*)&Year, (int)&Ms - (int)&Year + sizeof(Ms));
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return Buffer((void*)this, sizeof(this[0]));
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}
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// 重载等号运算符
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DateTime& DateTime::operator=(int 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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ToArray() = value.ToArray();
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}
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return *this;
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}
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int 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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int DateTime::TotalSeconds() const
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{
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int 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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Int64 DateTime::TotalMs() const
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{
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Int64 sec = (Int64)TotalSeconds();
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return sec * 1000LL + (Int64)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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int 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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auto dt = *this;
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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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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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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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auto dt = *this;
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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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DateTime DateTime::Add(const TimeSpan& value) const { return AddMilliseconds(value.TotalMs()); }
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DateTime DateTime::operator+(const TimeSpan& value) { return AddMilliseconds(value.TotalMs()); }
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DateTime DateTime::operator-(const TimeSpan& value) { return AddMilliseconds(-value.TotalMs()); }
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TimeSpan operator-(const DateTime& left, const DateTime& right)
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{
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Int64 ms = left.TotalMs() - right.TotalMs();
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return TimeSpan(ms);
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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::ToString() const
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{
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// F长全部 yyyy-MM-dd HH:mm:ss
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String str;
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if(Year < 10) str += '0';
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if(Year < 100) str += '0';
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if(Year < 1000) str += '0';
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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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return str;
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}
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void DateTime::Show(bool newLine) const
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{
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ToString().Show(newLine);
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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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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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// 当前时间
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DateTime DateTime::Now()
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{
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DateTime dt((int)time(NULL));
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return dt;
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}
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