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 #include "unicode/utypes.h"
11 
12 #if !UCONFIG_NO_FORMATTING
13 
14 #include "umutex.h"
15 #include "coptccal.h"
16 #include "cecal.h"
17 #include <float.h>
18 
19 U_NAMESPACE_BEGIN
20 
21 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)
22 
23 static const int32_t COPTIC_JD_EPOCH_OFFSET  = 1824665;
24 
25 //-------------------------------------------------------------------------
26 // Constructors...
27 //-------------------------------------------------------------------------
28 
29 CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)
30 : CECalendar(aLocale, success)
31 {
32 }
33 
34 CopticCalendar::CopticCalendar (const CopticCalendar& other)
35 : CECalendar(other)
36 {
37 }
38 
39 CopticCalendar::~CopticCalendar()
40 {
41 }
42 
43 Calendar*
44 CopticCalendar::clone() const
45 {
46     return new CopticCalendar(*this);
47 }
48 
49 const char*
50 CopticCalendar::getType() const
51 {
52     return "coptic";
53 }
54 
55 //-------------------------------------------------------------------------
56 // Calendar framework
57 //-------------------------------------------------------------------------
58 
59 int32_t
60 CopticCalendar::handleGetExtendedYear()
61 {
62     int32_t eyear;
63     if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
64         eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
65     } else {
66         // The year defaults to the epoch start, the era to CE
67         int32_t era = internalGet(UCAL_ERA, CE);
68         if (era == BCE) {
69             eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
70         } else {
71             eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
72         }
73     }
74     return eyear;
75 }
76 
77 void
78 CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
79 {
80     int32_t eyear, month, day, era, year;
81     jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
82 
83     if (eyear <= 0) {
84         era = BCE;
85         year = 1 - eyear;
86     } else {
87         era = CE;
88         year = eyear;
89     }
90 
91     internalSet(UCAL_EXTENDED_YEAR, eyear);
92     internalSet(UCAL_ERA, era);
93     internalSet(UCAL_YEAR, year);
94     internalSet(UCAL_MONTH, month);
95     internalSet(UCAL_DATE, day);
96     internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
97 }
98 
99 /**
100  * The system maintains a static default century start date and Year.  They are
101  * initialized the first time they are used.  Once the system default century date
102  * and year are set, they do not change.
103  */
104 static UDate           gSystemDefaultCenturyStart       = DBL_MIN;
105 static int32_t         gSystemDefaultCenturyStartYear   = -1;
106 static icu::UInitOnce  gSystemDefaultCenturyInit        = U_INITONCE_INITIALIZER;
107 
108 
109 static void U_CALLCONV initializeSystemDefaultCentury() {
110     UErrorCode status = U_ZERO_ERROR;
111     CopticCalendar calendar(Locale("@calendar=coptic"), status);
112     if (U_SUCCESS(status)) {
113         calendar.setTime(Calendar::getNow(), status);
114         calendar.add(UCAL_YEAR, -80, status);
115         gSystemDefaultCenturyStart = calendar.getTime(status);
116         gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);
117     }
118     // We have no recourse upon failure unless we want to propagate the failure
119     // out.
120 }
121 
122 UDate
123 CopticCalendar::defaultCenturyStart() const
124 {
125     // lazy-evaluate systemDefaultCenturyStart
126     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
127     return gSystemDefaultCenturyStart;
128 }
129 
130 int32_t
131 CopticCalendar::defaultCenturyStartYear() const
132 {
133     // lazy-evaluate systemDefaultCenturyStart
134     umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);
135     return gSystemDefaultCenturyStartYear;
136 }
137 
138 
139 int32_t
140 CopticCalendar::getJDEpochOffset() const
141 {
142     return COPTIC_JD_EPOCH_OFFSET;
143 }
144 
145 
146 #if 0
147 // We do not want to introduce this API in ICU4C.
148 // It was accidentally introduced in ICU4J as a public API.
149 
150 //-------------------------------------------------------------------------
151 // Calendar system Conversion methods...
152 //-------------------------------------------------------------------------
153 
154 int32_t
155 CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)
156 {
157     return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);
158 }
159 #endif
160 
161 U_NAMESPACE_END
162 
163 #endif /* #if !UCONFIG_NO_FORMATTING */
164 //eof
165