1 /* 2 ******************************************************************************* 3 * Copyright (C) 2003 - 2009, International Business Machines Corporation and * 4 * others. All Rights Reserved. * 5 ******************************************************************************* 6 */ 7 8 #include "unicode/utypes.h" 9 10 #if !UCONFIG_NO_FORMATTING 11 12 #include "cecal.h" 13 #include "gregoimp.h" //Math 14 15 U_NAMESPACE_BEGIN 16 17 static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { 18 // Minimum Greatest Least Maximum 19 // Minimum Maximum 20 { 0, 0, 1, 1}, // ERA 21 { 1, 1, 5000000, 5000000}, // YEAR 22 { 0, 0, 12, 12}, // MONTH 23 { 1, 1, 52, 53}, // WEEK_OF_YEAR 24 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH 25 { 1, 1, 5, 30}, // DAY_OF_MONTH 26 { 1, 1, 365, 366}, // DAY_OF_YEAR 27 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK 28 { -1, -1, 1, 5}, // DAY_OF_WEEK_IN_MONTH 29 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM 30 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR 31 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY 32 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE 33 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND 34 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND 35 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET 36 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET 37 { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY 38 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL 39 { -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR 40 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY 41 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY 42 {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH 43 }; 44 45 //------------------------------------------------------------------------- 46 // Constructors... 47 //------------------------------------------------------------------------- 48 49 CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success) 50 : Calendar(TimeZone::createDefault(), aLocale, success) 51 { 52 setTimeInMillis(getNow(), success); 53 } 54 55 CECalendar::CECalendar (const CECalendar& other) 56 : Calendar(other) 57 { 58 } 59 60 CECalendar::~CECalendar() 61 { 62 } 63 64 CECalendar& 65 CECalendar::operator=(const CECalendar& right) 66 { 67 Calendar::operator=(right); 68 return *this; 69 } 70 71 //------------------------------------------------------------------------- 72 // Calendar framework 73 //------------------------------------------------------------------------- 74 75 int32_t 76 CECalendar::handleComputeMonthStart(int32_t eyear,int32_t emonth, UBool /*useMonth*/) const 77 { 78 return ceToJD(eyear, emonth, 0, getJDEpochOffset()); 79 } 80 81 int32_t 82 CECalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const 83 { 84 return LIMITS[field][limitType]; 85 } 86 87 UBool 88 CECalendar::inDaylightTime(UErrorCode& status) const 89 { 90 if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) { 91 return FALSE; 92 } 93 94 // Force an update of the state of the Calendar. 95 ((CECalendar*)this)->complete(status); // cast away const 96 97 return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); 98 } 99 100 UBool 101 CECalendar::haveDefaultCentury() const 102 { 103 return TRUE; 104 } 105 106 //------------------------------------------------------------------------- 107 // Calendar system Conversion methods... 108 //------------------------------------------------------------------------- 109 int32_t 110 CECalendar::ceToJD(int32_t year, int32_t month, int32_t date, int32_t jdEpochOffset) 111 { 112 // handle month > 12, < 0 (e.g. from add/set) 113 if ( month >= 0 ) { 114 year += month/13; 115 month %= 13; 116 } else { 117 ++month; 118 year += month/13 - 1; 119 month = month%13 + 12; 120 } 121 return (int32_t) ( 122 jdEpochOffset // difference from Julian epoch to 1,1,1 123 + 365 * year // number of days from years 124 + ClockMath::floorDivide(year, 4) // extra day of leap year 125 + 30 * month // number of days from months (months are 0-based) 126 + date - 1 // number of days for present month (1 based) 127 ); 128 } 129 130 void 131 CECalendar::jdToCE(int32_t julianDay, int32_t jdEpochOffset, int32_t& year, int32_t& month, int32_t& day) 132 { 133 int32_t c4; // number of 4 year cycle (1461 days) 134 int32_t r4; // remainder of 4 year cycle, always positive 135 136 c4 = ClockMath::floorDivide(julianDay - jdEpochOffset, 1461, r4); 137 138 year = 4 * c4 + (r4/365 - r4/1460); // 4 * <number of 4year cycle> + <years within the last cycle> 139 140 int32_t doy = (r4 == 1460) ? 365 : (r4 % 365); // days in present year 141 142 month = doy / 30; // 30 -> Coptic/Ethiopic month length up to 12th month 143 day = (doy % 30) + 1; // 1-based days in a month 144 } 145 146 U_NAMESPACE_END 147 148 #endif /* #if !UCONFIG_NO_FORMATTING */ 149 //eof 150
