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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 - 2008, International Business Machines Corporation and  *
6 * others. All Rights Reserved.                                                *
7 *******************************************************************************
8 */
9 
10 #ifndef CECAL_H
11 #define CECAL_H
12 
13 #include "unicode/utypes.h"
14 
15 #if !UCONFIG_NO_FORMATTING
16 
17 #include "unicode/calendar.h"
18 
19 U_NAMESPACE_BEGIN
20 
21 /**
22  * Base class for EthiopicCalendar and CopticCalendar.
23  * @internal
24  */
25 class U_I18N_API CECalendar : public Calendar {
26 
27 protected:
28     //-------------------------------------------------------------------------
29     // Constructors...
30     //-------------------------------------------------------------------------
31 
32     /**
33      * Constructs a CECalendar based on the current time in the default time zone
34      * with the given locale with the Julian epoch offiset
35      *
36      * @param aLocale  The given locale.
37      * @param success  Indicates the status of CECalendar object construction.
38      *                 Returns U_ZERO_ERROR if constructed successfully.
39      * @internal
40      */
41     CECalendar(const Locale& aLocale, UErrorCode& success);
42 
43     /**
44      * Copy Constructor
45      * @internal
46      */
47     CECalendar (const CECalendar& other);
48 
49     /**
50      * Destructor.
51      * @internal
52      */
53     virtual ~CECalendar();
54 
55     /**
56      * Default assignment operator
57      * @param right    Calendar object to be copied
58      * @internal
59      */
60     CECalendar& operator=(const CECalendar& right);
61 
62 protected:
63     //-------------------------------------------------------------------------
64     // Calendar framework
65     //-------------------------------------------------------------------------
66 
67     /**
68      * Return JD of start of given month/extended year
69      * @internal
70      */
71     virtual int32_t handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const;
72 
73     /**
74      * Calculate the limit for a specified type of limit and field
75      * @internal
76      */
77     virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const;
78 
79     /**
80      * (Overrides Calendar) Return true if the current date for this Calendar is in
81      * Daylight Savings Time. Recognizes DST_OFFSET, if it is set.
82      *
83      * @param status Fill-in parameter which receives the status of this operation.
84      * @return   True if the current date for this Calendar is in Daylight Savings Time,
85      *           false, otherwise.
86      * @internal
87      */
88     virtual UBool inDaylightTime(UErrorCode&) const;
89 
90     /**
91      * Returns TRUE because Coptic/Ethiopic Calendar does have a default century
92      * @internal
93      */
94     virtual UBool haveDefaultCentury() const;
95 
96 protected:
97     /**
98      * The Coptic and Ethiopic calendars differ only in their epochs.
99      * This method must be implemented by CECalendar subclasses to
100      * return the date offset from Julian
101      * @internal
102      */
103     virtual int32_t getJDEpochOffset() const = 0;
104 
105     /**
106      * Convert an Coptic/Ethiopic year, month, and day to a Julian day.
107      *
108      * @param year the extended year
109      * @param month the month
110      * @param day the day
111      * @param jdEpochOffset the epoch offset from Julian epoch
112      * @return Julian day
113      * @internal
114      */
115     static int32_t ceToJD(int32_t year, int32_t month, int32_t date,
116         int32_t jdEpochOffset);
117 
118     /**
119      * Convert a Julian day to an Coptic/Ethiopic year, month and day
120      *
121      * @param julianDay the Julian day
122      * @param jdEpochOffset the epoch offset from Julian epoch
123      * @param year receives the extended year
124      * @param month receives the month
125      * @param date receives the day
126      * @internal
127      */
128     static void jdToCE(int32_t julianDay, int32_t jdEpochOffset,
129         int32_t& year, int32_t& month, int32_t& day);
130 };
131 
132 U_NAMESPACE_END
133 
134 #endif /* #if !UCONFIG_NO_FORMATTING */
135 #endif
136 //eof
137