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1 : // © 2016 and later: Unicode, Inc. and others.
2 : // License & terms of use: http://www.unicode.org/copyright.html
3 : /*
4 : *******************************************************************************
5 : * Copyright (C) 2003 - 2009, International Business Machines Corporation and *
6 : * others. All Rights Reserved. *
7 : *******************************************************************************
8 : */
9 :
10 : #include "unicode/utypes.h"
11 :
12 : #if !UCONFIG_NO_FORMATTING
13 :
14 : #include "cecal.h"
15 : #include "gregoimp.h" //Math
16 :
17 : U_NAMESPACE_BEGIN
18 :
19 : static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
20 : // Minimum Greatest Least Maximum
21 : // Minimum Maximum
22 : { 0, 0, 1, 1}, // ERA
23 : { 1, 1, 5000000, 5000000}, // YEAR
24 : { 0, 0, 12, 12}, // MONTH
25 : { 1, 1, 52, 53}, // WEEK_OF_YEAR
26 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
27 : { 1, 1, 5, 30}, // DAY_OF_MONTH
28 : { 1, 1, 365, 366}, // DAY_OF_YEAR
29 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
30 : { -1, -1, 1, 5}, // DAY_OF_WEEK_IN_MONTH
31 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
32 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
33 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
34 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
35 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
36 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
37 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
38 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
39 : { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY
40 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
41 : { -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR
42 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
43 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY
44 : {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH
45 : };
46 :
47 : //-------------------------------------------------------------------------
48 : // Constructors...
49 : //-------------------------------------------------------------------------
50 :
51 0 : CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success)
52 0 : : Calendar(TimeZone::createDefault(), aLocale, success)
53 : {
54 0 : setTimeInMillis(getNow(), success);
55 0 : }
56 :
57 0 : CECalendar::CECalendar (const CECalendar& other)
58 0 : : Calendar(other)
59 : {
60 0 : }
61 :
62 0 : CECalendar::~CECalendar()
63 : {
64 0 : }
65 :
66 : CECalendar&
67 0 : CECalendar::operator=(const CECalendar& right)
68 : {
69 0 : Calendar::operator=(right);
70 0 : return *this;
71 : }
72 :
73 : //-------------------------------------------------------------------------
74 : // Calendar framework
75 : //-------------------------------------------------------------------------
76 :
77 : int32_t
78 0 : CECalendar::handleComputeMonthStart(int32_t eyear,int32_t emonth, UBool /*useMonth*/) const
79 : {
80 0 : return ceToJD(eyear, emonth, 0, getJDEpochOffset());
81 : }
82 :
83 : int32_t
84 0 : CECalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
85 : {
86 0 : return LIMITS[field][limitType];
87 : }
88 :
89 : UBool
90 0 : CECalendar::inDaylightTime(UErrorCode& status) const
91 : {
92 0 : if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) {
93 0 : return FALSE;
94 : }
95 :
96 : // Force an update of the state of the Calendar.
97 0 : ((CECalendar*)this)->complete(status); // cast away const
98 :
99 0 : return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
100 : }
101 :
102 : UBool
103 0 : CECalendar::haveDefaultCentury() const
104 : {
105 0 : return TRUE;
106 : }
107 :
108 : //-------------------------------------------------------------------------
109 : // Calendar system Conversion methods...
110 : //-------------------------------------------------------------------------
111 : int32_t
112 0 : CECalendar::ceToJD(int32_t year, int32_t month, int32_t date, int32_t jdEpochOffset)
113 : {
114 : // handle month > 12, < 0 (e.g. from add/set)
115 0 : if ( month >= 0 ) {
116 0 : year += month/13;
117 0 : month %= 13;
118 : } else {
119 0 : ++month;
120 0 : year += month/13 - 1;
121 0 : month = month%13 + 12;
122 : }
123 : return (int32_t) (
124 : jdEpochOffset // difference from Julian epoch to 1,1,1
125 0 : + 365 * year // number of days from years
126 0 : + ClockMath::floorDivide(year, 4) // extra day of leap year
127 0 : + 30 * month // number of days from months (months are 0-based)
128 0 : + date - 1 // number of days for present month (1 based)
129 0 : );
130 : }
131 :
132 : void
133 0 : CECalendar::jdToCE(int32_t julianDay, int32_t jdEpochOffset, int32_t& year, int32_t& month, int32_t& day)
134 : {
135 : int32_t c4; // number of 4 year cycle (1461 days)
136 : int32_t r4; // remainder of 4 year cycle, always positive
137 :
138 0 : c4 = ClockMath::floorDivide(julianDay - jdEpochOffset, 1461, r4);
139 :
140 0 : year = 4 * c4 + (r4/365 - r4/1460); // 4 * <number of 4year cycle> + <years within the last cycle>
141 :
142 0 : int32_t doy = (r4 == 1460) ? 365 : (r4 % 365); // days in present year
143 :
144 0 : month = doy / 30; // 30 -> Coptic/Ethiopic month length up to 12th month
145 0 : day = (doy % 30) + 1; // 1-based days in a month
146 0 : }
147 :
148 : U_NAMESPACE_END
149 :
150 : #endif /* #if !UCONFIG_NO_FORMATTING */
151 : //eof
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