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 "umutex.h"
13 #include "coptccal.h"
14 #include "cecal.h"
15 #include <float.h>
16
17 U_NAMESPACE_BEGIN
18
19 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)
20
21 static const int32_t COPTIC_JD_EPOCH_OFFSET = 1824665;
22
23 //-------------------------------------------------------------------------
24 // Constructors...
25 //-------------------------------------------------------------------------
26
CopticCalendar(const Locale & aLocale,UErrorCode & success)27 CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)
28 : CECalendar(aLocale, success)
29 {
30 }
31
CopticCalendar(const CopticCalendar & other)32 CopticCalendar::CopticCalendar (const CopticCalendar& other)
33 : CECalendar(other)
34 {
35 }
36
~CopticCalendar()37 CopticCalendar::~CopticCalendar()
38 {
39 }
40
41 Calendar*
clone() const42 CopticCalendar::clone() const
43 {
44 return new CopticCalendar(*this);
45 }
46
47 const char*
getType() const48 CopticCalendar::getType() const
49 {
50 return "coptic";
51 }
52
53 //-------------------------------------------------------------------------
54 // Calendar framework
55 //-------------------------------------------------------------------------
56
57 int32_t
handleGetExtendedYear()58 CopticCalendar::handleGetExtendedYear()
59 {
60 int32_t eyear;
61 if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
62 eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1
63 } else {
64 // The year defaults to the epoch start, the era to CE
65 int32_t era = internalGet(UCAL_ERA, CE);
66 if (era == BCE) {
67 eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year
68 } else {
69 eyear = internalGet(UCAL_YEAR, 1); // Default to year 1
70 }
71 }
72 return eyear;
73 }
74
75 void
handleComputeFields(int32_t julianDay,UErrorCode &)76 CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)
77 {
78 int32_t eyear, month, day, era, year;
79 jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);
80
81 if (eyear <= 0) {
82 era = BCE;
83 year = 1 - eyear;
84 } else {
85 era = CE;
86 year = eyear;
87 }
88
89 internalSet(UCAL_EXTENDED_YEAR, eyear);
90 internalSet(UCAL_ERA, era);
91 internalSet(UCAL_YEAR, year);
92 internalSet(UCAL_MONTH, month);
93 internalSet(UCAL_DATE, day);
94 internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);
95 }
96
97 const UDate CopticCalendar::fgSystemDefaultCentury = DBL_MIN;
98 const int32_t CopticCalendar::fgSystemDefaultCenturyYear = -1;
99
100 UDate CopticCalendar::fgSystemDefaultCenturyStart = DBL_MIN;
101 int32_t CopticCalendar::fgSystemDefaultCenturyStartYear = -1;
102
103 UDate
defaultCenturyStart() const104 CopticCalendar::defaultCenturyStart() const
105 {
106 initializeSystemDefaultCentury();
107
108 // use defaultCenturyStart unless it's the flag value;
109 // then use systemDefaultCenturyStart
110 return fgSystemDefaultCenturyStart;
111 }
112
113 int32_t
defaultCenturyStartYear() const114 CopticCalendar::defaultCenturyStartYear() const
115 {
116 initializeSystemDefaultCentury();
117
118 // use defaultCenturyStart unless it's the flag value;
119 // then use systemDefaultCenturyStart
120 return fgSystemDefaultCenturyStartYear;
121 }
122
123 void
initializeSystemDefaultCentury()124 CopticCalendar::initializeSystemDefaultCentury()
125 {
126 // lazy-evaluate systemDefaultCenturyStart
127 UBool needsUpdate;
128 UMTX_CHECK(NULL, (fgSystemDefaultCenturyStart == fgSystemDefaultCentury), needsUpdate);
129
130 if (!needsUpdate) {
131 return;
132 }
133
134 UErrorCode status = U_ZERO_ERROR;
135
136 CopticCalendar calendar(Locale("@calendar=coptic"), status);
137 if (U_SUCCESS(status)) {
138 calendar.setTime(Calendar::getNow(), status);
139 calendar.add(UCAL_YEAR, -80, status);
140 UDate newStart = calendar.getTime(status);
141 int32_t newYear = calendar.get(UCAL_YEAR, status);
142 {
143 umtx_lock(NULL);
144 fgSystemDefaultCenturyStartYear = newYear;
145 fgSystemDefaultCenturyStart = newStart;
146 umtx_unlock(NULL);
147 }
148 }
149 // We have no recourse upon failure unless we want to propagate the failure
150 // out.
151 }
152
153 int32_t
getJDEpochOffset() const154 CopticCalendar::getJDEpochOffset() const
155 {
156 return COPTIC_JD_EPOCH_OFFSET;
157 }
158
159
160 #if 0
161 // We do not want to introduce this API in ICU4C.
162 // It was accidentally introduced in ICU4J as a public API.
163
164 //-------------------------------------------------------------------------
165 // Calendar system Conversion methods...
166 //-------------------------------------------------------------------------
167
168 int32_t
169 CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)
170 {
171 return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);
172 }
173 #endif
174
175 U_NAMESPACE_END
176
177 #endif /* #if !UCONFIG_NO_FORMATTING */
178 //eof
179