浅谈时间戳与日期时间互转C语言

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 /* * ctime.h * * Created on: May 19, 2016 * */ #ifndef CTIME_H_ #define CTIME_H_ #include "common/micro_type.h" #define OFFSET_SECOND 946684800 //#define OFFSET_SECOND 0 #define SECOND_OF_DAY 86400 typedef struct date_time { uint16 iYear; uint16 iMon; uint16 iDay; uint16 iHour; uint16 iMin; uint16 iSec; uint16 iMsec; } DATE_TIME; void GetDateTimeFromSecond(unsigned long lSec, DATE_TIME *tTime); #endif /* * ctime.c * * Created on: May 19, 2016 * Author: root */ #include "common/micro_type.h" #include "ctime.h" uint8 DayOfMon[12] = {31,28,31,30,31,30,31,31,30,31,30,31}; unsigned long GetSecondTime(DATE_TIME *date_time) { uint16 iYear, iMon, iDay, iHour, iMin, iSec; iYear = date_time->iYear; iMon = date_time->iMon; iDay = date_time->iDay; iHour = date_time->iHour; iMin = date_time->iMin; iSec = date_time->iSec; uint16 i, Cyear=0; unsigned long CountDay=0; for(i=1970; i<iYear; i++) { if(((i%4==0) && (i%100!=0)) || (i%400==0)) Cyear++; } CountDay = Cyear * 366 + (iYear-1970-Cyear) * 365; for(i=1; i<iMon; i++) { if((i==2) && (((iYear%4==0)&&(iYear%100!=0)) || (iYear%400==0))) CountDay += 29; else CountDay += DayOfMon[i-1]; } CountDay += (iDay-1); CountDay = CountDay*SECOND_OF_DAY + (unsigned long)iHour*3600 + (unsigned long)iMin*60 + iSec; return CountDay; } void GetDateTimeFromSecond(unsigned long lSec, DATE_TIME *tTime) { uint16 i,j,iDay; unsigned long lDay; lDay = lSec / SECOND_OF_DAY; lSec = lSec % SECOND_OF_DAY; i = 1970; while(lDay > 365) { if(((i%4==0)&&(i%100!=0)) || (i%400==0)) lDay -= 366; else lDay -= 365; i++; } if((lDay == 365) && !(((i%4==0)&&(i%100!=0)) || (i%400==0))) { lDay -= 365; i++; } tTime->iYear = i; for(j=0;j<12;j++) { if((j==1) && (((i%4==0)&&(i%100!=0)) || (i%400==0))) iDay = 29; else iDay = DayOfMon[j]; if(lDay >= iDay) lDay -= iDay; else break; } tTime->iMon = j+1; tTime->iDay = lDay+1; tTime->iHour = ((lSec / 3600)+8)%24;//这里注意，世界时间已经加上北京时间差8， tTime->iMin = (lSec % 3600) / 60; tTime->iSec = (lSec % 3600) % 60; }

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