aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/icu/i18n/buddhcal.cpp
blob: 6083349ecd623a70260a1c82377a2cbf1afae0d8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2003-2013, International Business Machines Corporation and    *
* others. All Rights Reserved.                                                *
*******************************************************************************
*
* File BUDDHCAL.CPP
*
* Modification History:
*  05/13/2003    srl     copied from gregocal.cpp
*
*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "buddhcal.h"
#include "unicode/gregocal.h"
#include "umutex.h"
#include <float.h>

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(BuddhistCalendar)

//static const int32_t kMaxEra = 0; // only 1 era

static const int32_t kBuddhistEraStart = -543;  // 544 BC (Gregorian)

static const int32_t kGregorianEpoch = 1970;    // used as the default value of EXTENDED_YEAR

BuddhistCalendar::BuddhistCalendar(const Locale& aLocale, UErrorCode& success)
:   GregorianCalendar(aLocale, success)
{
    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
}

BuddhistCalendar::~BuddhistCalendar()
{
}

BuddhistCalendar::BuddhistCalendar(const BuddhistCalendar& source)
: GregorianCalendar(source)
{
}

BuddhistCalendar& BuddhistCalendar::operator= ( const BuddhistCalendar& right)
{
    GregorianCalendar::operator=(right);
    return *this;
}

BuddhistCalendar* BuddhistCalendar::clone() const
{
    return new BuddhistCalendar(*this);
}

const char *BuddhistCalendar::getType() const
{
    return "buddhist";
}

int32_t BuddhistCalendar::handleGetExtendedYear()
{
    // EXTENDED_YEAR in BuddhistCalendar is a Gregorian year.
    // The default value of EXTENDED_YEAR is 1970 (Buddhist 2513)
    int32_t year;
    if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {
        year = internalGet(UCAL_EXTENDED_YEAR, kGregorianEpoch);
    } else {
        // extended year is a gregorian year, where 1 = 1AD,  0 = 1BC, -1 = 2BC, etc 
        year = internalGet(UCAL_YEAR, kGregorianEpoch - kBuddhistEraStart)
                + kBuddhistEraStart;
    }
    return year;
}

int32_t BuddhistCalendar::handleComputeMonthStart(int32_t eyear, int32_t month,

                                                  UBool useMonth) const
{
    return GregorianCalendar::handleComputeMonthStart(eyear, month, useMonth);
}

void BuddhistCalendar::handleComputeFields(int32_t julianDay, UErrorCode& status)
{
    GregorianCalendar::handleComputeFields(julianDay, status);
    int32_t y = internalGet(UCAL_EXTENDED_YEAR) - kBuddhistEraStart;
    internalSet(UCAL_ERA, 0);
    internalSet(UCAL_YEAR, y);
}

int32_t BuddhistCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
{
    if(field == UCAL_ERA) {
        return BE;
    } else {
        return GregorianCalendar::handleGetLimit(field,limitType);
    }
}

#if 0
void BuddhistCalendar::timeToFields(UDate theTime, UBool quick, UErrorCode& status)
{
    //Calendar::timeToFields(theTime, quick, status);

    int32_t era = internalGet(UCAL_ERA);
    int32_t year = internalGet(UCAL_YEAR);

    if(era == GregorianCalendar::BC) {
        year = 1-year;
        era = BuddhistCalendar::BE;
    } else if(era == GregorianCalendar::AD) {
        era = BuddhistCalendar::BE;
    } else {
        status = U_INTERNAL_PROGRAM_ERROR;
    }

    year = year - kBuddhistEraStart;

    internalSet(UCAL_ERA, era);
    internalSet(UCAL_YEAR, year);
}
#endif

/**
 * The system maintains a static default century start date.  This is initialized
 * the first time it is used. Once the system default century date and year
 * are set, they do not change.
 */
static UDate     gSystemDefaultCenturyStart       = DBL_MIN;
static int32_t   gSystemDefaultCenturyStartYear   = -1;
static icu::UInitOnce gBCInitOnce = U_INITONCE_INITIALIZER;


UBool BuddhistCalendar::haveDefaultCentury() const
{
    return TRUE;
}

static void U_CALLCONV
initializeSystemDefaultCentury()
{
    // initialize systemDefaultCentury and systemDefaultCenturyYear based
    // on the current time.  They'll be set to 80 years before
    // the current time.
    UErrorCode status = U_ZERO_ERROR;
    BuddhistCalendar calendar(Locale("@calendar=buddhist"),status);
    if (U_SUCCESS(status)) {
        calendar.setTime(Calendar::getNow(), status);
        calendar.add(UCAL_YEAR, -80, status);
        UDate    newStart =  calendar.getTime(status);
        int32_t  newYear  =  calendar.get(UCAL_YEAR, status);
        gSystemDefaultCenturyStartYear = newYear;
        gSystemDefaultCenturyStart = newStart;
    }
    // We have no recourse upon failure unless we want to propagate the failure
    // out.
}

UDate BuddhistCalendar::defaultCenturyStart() const
{
    // lazy-evaluate systemDefaultCenturyStart and systemDefaultCenturyStartYear
    umtx_initOnce(gBCInitOnce, &initializeSystemDefaultCentury);
    return gSystemDefaultCenturyStart;
}

int32_t BuddhistCalendar::defaultCenturyStartYear() const
{
    // lazy-evaluate systemDefaultCenturyStartYear and systemDefaultCenturyStart 
    umtx_initOnce(gBCInitOnce, &initializeSystemDefaultCentury);
    return gSystemDefaultCenturyStartYear;
}


U_NAMESPACE_END

#endif