The Tor Browser: intl/icu/source/i18n/cecal.cpp@fc2d59ddac77

     1 /*

     2 *******************************************************************************

     3 * Copyright (C) 2003 - 2009, International Business Machines Corporation and  *

     4 * others. All Rights Reserved.                                                *

     5 *******************************************************************************

     6 */

     8 #include "unicode/utypes.h"

    10 #if !UCONFIG_NO_FORMATTING

    12 #include "cecal.h"

    13 #include "gregoimp.h"   //Math

    15 U_NAMESPACE_BEGIN

    17 static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {

    18     // Minimum  Greatest    Least  Maximum

    19     //           Minimum  Maximum

    20     {        0,        0,        1,        1}, // ERA

    21     {        1,        1,  5000000,  5000000}, // YEAR

    22     {        0,        0,       12,       12}, // MONTH

    23     {        1,        1,       52,       53}, // WEEK_OF_YEAR

    24     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH

    25     {        1,        1,        5,       30}, // DAY_OF_MONTH

    26     {        1,        1,      365,      366}, // DAY_OF_YEAR

    27     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK

    28     {       -1,       -1,        1,        5}, // DAY_OF_WEEK_IN_MONTH

    29     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM

    30     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR

    31     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY

    32     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE

    33     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND

    34     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND

    35     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET

    36     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET

    37     { -5000000, -5000000,  5000000,  5000000}, // YEAR_WOY

    38     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL

    39     { -5000000, -5000000,  5000000,  5000000}, // EXTENDED_YEAR

    40     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY

    41     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY

    42     {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH

    43 };

    45 //-------------------------------------------------------------------------

    46 // Constructors...

    47 //-------------------------------------------------------------------------

    49 CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success)

    50 :   Calendar(TimeZone::createDefault(), aLocale, success)

    51 {

    52     setTimeInMillis(getNow(), success);

    53 }

    55 CECalendar::CECalendar (const CECalendar& other)

    56 :   Calendar(other)

    57 {

    58 }

    60 CECalendar::~CECalendar()

    61 {

    62 }

    64 CECalendar&

    65 CECalendar::operator=(const CECalendar& right)

    66 {

    67     Calendar::operator=(right);

    68     return *this;

    69 }

    71 //-------------------------------------------------------------------------

    72 // Calendar framework

    73 //-------------------------------------------------------------------------

    75 int32_t

    76 CECalendar::handleComputeMonthStart(int32_t eyear,int32_t emonth, UBool /*useMonth*/) const

    77 {

    78     return ceToJD(eyear, emonth, 0, getJDEpochOffset());

    79 }

    81 int32_t

    82 CECalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const

    83 {

    84     return LIMITS[field][limitType];

    85 }

    87 UBool

    88 CECalendar::inDaylightTime(UErrorCode& status) const

    89 {

    90     if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) {

    91         return FALSE;

    92     }

    94     // Force an update of the state of the Calendar.

    95     ((CECalendar*)this)->complete(status); // cast away const

    97     return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);

    98 }

   100 UBool

   101 CECalendar::haveDefaultCentury() const

   102 {

   103     return TRUE;

   104 }

   106 //-------------------------------------------------------------------------

   107 // Calendar system Conversion methods...

   108 //-------------------------------------------------------------------------

   109 int32_t

   110 CECalendar::ceToJD(int32_t year, int32_t month, int32_t date, int32_t jdEpochOffset)

   111 {

   112     // handle month > 12, < 0 (e.g. from add/set)

   113     if ( month >= 0 ) {

   114         year += month/13;

   115         month %= 13;

   116     } else {

   117         ++month;

   118         year += month/13 - 1;

   119         month = month%13 + 12;

   120     }

   121     return (int32_t) (

   122         jdEpochOffset                   // difference from Julian epoch to 1,1,1

   123         + 365 * year                    // number of days from years

   124         + ClockMath::floorDivide(year, 4)    // extra day of leap year

   125         + 30 * month                    // number of days from months (months are 0-based)

   126         + date - 1                      // number of days for present month (1 based)

   127         );

   128 }

   130 void

   131 CECalendar::jdToCE(int32_t julianDay, int32_t jdEpochOffset, int32_t& year, int32_t& month, int32_t& day)

   132 {

   133     int32_t c4; // number of 4 year cycle (1461 days)

   134     int32_t r4; // remainder of 4 year cycle, always positive

   136     c4 = ClockMath::floorDivide(julianDay - jdEpochOffset, 1461, r4);

   138     year = 4 * c4 + (r4/365 - r4/1460); // 4 * <number of 4year cycle> + <years within the last cycle>

   140     int32_t doy = (r4 == 1460) ? 365 : (r4 % 365); // days in present year

   142     month = doy / 30;       // 30 -> Coptic/Ethiopic month length up to 12th month

   143     day = (doy % 30) + 1;   // 1-based days in a month

   144 }

   146 U_NAMESPACE_END

   148 #endif /* #if !UCONFIG_NO_FORMATTING */

   149 //eof

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