1 #define YEAR_BEGIN 1970 2 #define LEAPYEAR_DAY 366 3 #define NORMALYEAR_DAY 365 4 #define JANUARY 31 5 #define MARCH 31 6 #define APRIL 30 7 #define MAY 31 8 #define JUNE 30 9 #define JULY 31 10 #define AUGUST 31 11 #define SEPTEMBER 30 12 #define OCTOBER 31 13 #define NOVEMBER 30 14 #define DECEMBER 31 15 16 bool CXXXClass::IsLeapYear(DWORD year) 17 { 18 return (((year % 4 == 0) && (year %100 != 0)) || (year % 400 == 0)); 19 } 20 21 bool CXXXClass::UtcTimeToLocalTime(DWORD dwUtc, CString &strUtc) 22 { 23 int tmp_day; 24 DWORD year, month, day; 25 DWORD sec, mins, hour; 26 TIME_ZONE_INFORMATION tzi; 27 ZeroMemory(&tzi, sizeof(TIME_ZONE_INFORMATION)); 28 CString strTimeZone = _T(""); 29 DWORD dwTimeZoneID = GetTimeZoneInformation(&tzi); 30 if (dwTimeZoneID == TIME_ZONE_ID_UNKNOWN) { 31 dwUtc -= (tzi.Bias * 60); 32 strTimeZone = tzi.StandardName; 33 } else if (dwTimeZoneID == TIME_ZONE_ID_STANDARD) { 34 dwUtc -= (tzi.Bias * 60 + tzi.StandardBias * 60); 35 strTimeZone = tzi.StandardName; 36 } else if ( dwTimeZoneID == TIME_ZONE_ID_DAYLIGHT) { 37 dwUtc -= (tzi.Bias * 60 + tzi.DaylightBias * 60); 38 strTimeZone = tzi.DaylightName; 39 } 40 hour = dwUtc / 3600; 41 sec = dwUtc % 3600; 42 mins = sec / 60; 43 sec %= 60; 44 45 tmp_day = hour / 24 + 1; 46 hour %= 24; 47 48 year = YEAR_BEGIN; 49 while(1) { 50 if(tmp_day < LEAPYEAR_DAY) 51 break; 52 if(IsLeapYear(year)) { 53 tmp_day -= LEAPYEAR_DAY; 54 } else { 55 tmp_day -= NORMALYEAR_DAY; 56 } 57 year++; 58 } 59 60 DWORD feb = IsLeapYear(year) ? 29 : 28; 61 day = 1; 62 month = 1; 63 64 for(int i = 0; i < 12; i++) { 65 day = tmp_day; 66 switch(i) { 67 case 0: 68 tmp_day -= JANUARY; 69 break; 70 case 1: 71 tmp_day -= feb; 72 break; 73 case 2: 74 tmp_day -= MARCH; 75 break; 76 case 3: 77 tmp_day -= APRIL; 78 break; 79 case 4: 80 tmp_day -= MAY; 81 break; 82 case 5: 83 tmp_day -= JUNE; 84 break; 85 case 6: 86 tmp_day -= JULY; 87 break; 88 case 7: 89 tmp_day -= AUGUST; 90 break; 91 case 8: 92 tmp_day -= SEPTEMBER; 93 break; 94 case 9: 95 tmp_day -= OCTOBER; 96 break; 97 case 10: 98 tmp_day -= NOVEMBER; 99 break; 100 case 11: 101 tmp_day -= DECEMBER; 102 break; 103 default: 104 break; 105 } 106 if(tmp_day > 0) 107 month++; 108 else 109 break; 110 } 111 if(strTimeZone.IsEmpty()) 112 strUtc.Format(_T("%d-%d-%d %d:%2d:%2d"), year, month, day, hour, mins, sec); 113 else 114 strUtc.Format(_T("%s %d-%d-%d %d:%2d:%2d"), (LPCTSTR)strTimeZone, year, month, day, hour, mins, sec); 115 116 return true; 117 }
需要做一个获取Android编译生成时间的功能，网上找了些，都不好用，于是自己写了个。现在放上来，做个笔记。