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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 - 2013, International Business Machines Corporation and  *
6 * others. All Rights Reserved.                                                *
7 *******************************************************************************
8 */
9 
10 #ifndef ETHPCCAL_H
11 #define ETHPCCAL_H
12 
13 #include "unicode/utypes.h"
14 
15 #if !UCONFIG_NO_FORMATTING
16 
17 #include "unicode/calendar.h"
18 #include "cecal.h"
19 
20 U_NAMESPACE_BEGIN
21 
22 /**
23  * Implement the Ethiopic calendar system.
24  * @internal
25  */
26 class EthiopicCalendar : public CECalendar {
27 
28 public:
29     /**
30      * Calendar type - use Amete Alem era for all the time or not
31      * @internal
32      */
33     enum EEraType {
34         AMETE_MIHRET_ERA,
35         AMETE_ALEM_ERA
36     };
37 
38     /**
39      * Useful constants for EthiopicCalendar.
40      * @internal
41      */
42     enum EMonths {
43         /**
44          * Constant for መስከረም, the 1st month of the Ethiopic year.
45          */
46         MESKEREM,
47 
48         /**
49          * Constant for ጥቅምት, the 2nd month of the Ethiopic year.
50          */
51         TEKEMT,
52 
53         /**
54          * Constant for ኅዳር, the 3rd month of the Ethiopic year.
55          */
56         HEDAR,
57 
58         /**
59          * Constant for ታኅሣሥ, the 4th month of the Ethiopic year.
60          */
61         TAHSAS,
62 
63         /**
64          * Constant for ጥር, the 5th month of the Ethiopic year.
65          */
66         TER,
67 
68         /**
69          * Constant for የካቲት, the 6th month of the Ethiopic year.
70          */
71         YEKATIT,
72 
73         /**
74          * Constant for መጋቢት, the 7th month of the Ethiopic year.
75          */
76         MEGABIT,
77 
78         /**
79          * Constant for ሚያዝያ, the 8th month of the Ethiopic year.
80          */
81         MIAZIA,
82 
83         /**
84          * Constant for ግንቦት, the 9th month of the Ethiopic year.
85          */
86         GENBOT,
87 
88         /**
89          * Constant for ሰኔ, the 10th month of the Ethiopic year.
90          */
91         SENE,
92 
93         /**
94          * Constant for ሐምሌ, the 11th month of the Ethiopic year.
95          */
96         HAMLE,
97 
98         /**
99          * Constant for ነሐሴ, the 12th month of the Ethiopic year.
100          */
101         NEHASSA,
102 
103         /**
104          * Constant for ጳጉሜን, the 13th month of the Ethiopic year.
105          */
106         PAGUMEN
107     };
108 
109     enum EEras {
110         AMETE_ALEM,     // Before the epoch
111         AMETE_MIHRET    // After the epoch
112     };
113 
114     /**
115      * Constructs a EthiopicCalendar based on the current time in the default time zone
116      * with the given locale.
117      *
118      * @param aLocale  The given locale.
119      * @param success  Indicates the status of EthiopicCalendar object construction.
120      *                 Returns U_ZERO_ERROR if constructed successfully.
121      * @param type     Whether this Ethiopic calendar use Amete Mihrret (default) or
122      *                 only use Amete Alem for all the time.
123      * @internal
124      */
125     EthiopicCalendar(const Locale& aLocale, UErrorCode& success, EEraType type = AMETE_MIHRET_ERA);
126 
127     /**
128      * Copy Constructor
129      * @internal
130      */
131     EthiopicCalendar(const EthiopicCalendar& other);
132 
133     /**
134      * Destructor.
135      * @internal
136      */
137     virtual ~EthiopicCalendar();
138 
139     /**
140      * Create and return a polymorphic copy of this calendar.
141      * @return    return a polymorphic copy of this calendar.
142      * @internal
143      */
144     virtual Calendar* clone() const;
145 
146     /**
147      * return the calendar type, "ethiopic"
148      * @return calendar type
149      * @internal
150      */
151     virtual const char * getType() const;
152 
153     /**
154      * Set Alem or Mihret era.
155      * @param onOff Set Amete Alem era if true, otherwise set Amete Mihret era.
156      * @internal
157      */
158     void setAmeteAlemEra (UBool onOff);
159 
160     /**
161      * Return true if this calendar is set to the Amete Alem era.
162      * @return true if set to the Amete Alem era.
163      * @internal
164      */
165     UBool isAmeteAlemEra() const;
166 
167 protected:
168     //-------------------------------------------------------------------------
169     // Calendar framework
170     //-------------------------------------------------------------------------
171 
172     /**
173      * Return the extended year defined by the current fields.
174      * @internal
175      */
176     virtual int32_t handleGetExtendedYear();
177 
178     /**
179      * Compute fields from the JD
180      * @internal
181      */
182     virtual void handleComputeFields(int32_t julianDay, UErrorCode &status);
183 
184     /**
185      * Calculate the limit for a specified type of limit and field
186      * @internal
187      */
188     virtual int32_t handleGetLimit(UCalendarDateFields field, ELimitType limitType) const;
189 
190     /**
191      * Returns the date of the start of the default century
192      * @return start of century - in milliseconds since epoch, 1970
193      * @internal
194      */
195     virtual UDate defaultCenturyStart() const;
196 
197     /**
198      * Returns the year in which the default century begins
199      * @internal
200      */
201     virtual int32_t defaultCenturyStartYear() const;
202 
203     /**
204      * Return the date offset from Julian
205      * @internal
206      */
207     virtual int32_t getJDEpochOffset() const;
208 
209 private:
210     /**
211      * When eraType is AMETE_ALEM_ERA, then this calendar use only AMETE_ALEM
212      * for the era. Otherwise (default), this calendar uses both AMETE_ALEM
213      * and AMETE_MIHRET.
214      *
215      * EXTENDED_YEAR        AMETE_ALEM_ERA     AMETE_MIHRET_ERA
216      *             0       Amete Alem 5500      Amete Alem 5500
217      *             1        Amete Mihret 1      Amete Alem 5501
218      */
219     EEraType eraType;
220 
221 public:
222     /**
223      * Override Calendar Returns a unique class ID POLYMORPHICALLY. Pure virtual
224      * override. This method is to implement a simple version of RTTI, since not all C++
225      * compilers support genuine RTTI. Polymorphic operator==() and clone() methods call
226      * this method.
227      *
228      * @return   The class ID for this object. All objects of a given class have the
229      *           same class ID. Objects of other classes have different class IDs.
230      * @internal
231      */
232     virtual UClassID getDynamicClassID(void) const;
233 
234     /**
235      * Return the class ID for this class. This is useful only for comparing to a return
236      * value from getDynamicClassID(). For example:
237      *
238      *      Base* polymorphic_pointer = createPolymorphicObject();
239      *      if (polymorphic_pointer->getDynamicClassID() ==
240      *          Derived::getStaticClassID()) ...
241      *
242      * @return   The class ID for all objects of this class.
243      * @internal
244      */
245     U_I18N_API static UClassID U_EXPORT2 getStaticClassID(void);
246 
247 #if 0
248 // We do not want to introduce this API in ICU4C.
249 // It was accidentally introduced in ICU4J as a public API.
250 
251 public:
252     //-------------------------------------------------------------------------
253     // Calendar system Conversion methods...
254     //-------------------------------------------------------------------------
255 
256     /**
257      * Convert an Ethiopic year, month, and day to a Julian day.
258      *
259      * @param year the extended year
260      * @param month the month
261      * @param day the day
262      * @return Julian day
263      * @internal
264      */
265     int32_t ethiopicToJD(int32_t year, int32_t month, int32_t day);
266 #endif
267 };
268 
269 U_NAMESPACE_END
270 #endif /* #if !UCONFIG_NO_FORMATTING */
271 #endif /* ETHPCCAL_H */
272 //eof
273