Check in the pristine copy of ICU 4.6...

icu46/source/i18n/cecal.cpp

+/*
+*******************************************************************************
+* Copyright (C) 2003 - 2009, International Business Machines Corporation and  *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "cecal.h"
+#include "gregoimp.h"   //Math
+
+U_NAMESPACE_BEGIN
+
+static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
+    // Minimum  Greatest    Least  Maximum
+    //           Minimum  Maximum
+    {        0,        0,        1,        1}, // ERA
+    {        1,        1,  5000000,  5000000}, // YEAR
+    {        0,        0,       12,       12}, // MONTH
+    {        1,        1,       52,       53}, // WEEK_OF_YEAR
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
+    {        1,        1,        5,       30}, // DAY_OF_MONTH
+    {        1,        1,      365,      366}, // DAY_OF_YEAR
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
+    {       -1,       -1,        1,        5}, // DAY_OF_WEEK_IN_MONTH
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
+    { -5000000, -5000000,  5000000,  5000000}, // YEAR_WOY
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
+    { -5000000, -5000000,  5000000,  5000000}, // EXTENDED_YEAR
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY
+    {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH
+};
+
+//-------------------------------------------------------------------------
+// Constructors...
+//-------------------------------------------------------------------------
+
+CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success)
+:   Calendar(TimeZone::createDefault(), aLocale, success)
+{
+    setTimeInMillis(getNow(), success);
+}
+
+CECalendar::CECalendar (const CECalendar& other) 
+:   Calendar(other)
+{
+}
+
+CECalendar::~CECalendar()
+{
+}
+
+CECalendar&
+CECalendar::operator=(const CECalendar& right)
+{
+    Calendar::operator=(right);
+    return *this;
+}
+
+//-------------------------------------------------------------------------
+// Calendar framework
+//-------------------------------------------------------------------------
+
+int32_t
+CECalendar::handleComputeMonthStart(int32_t eyear,int32_t emonth, UBool /*useMonth*/) const
+{
+    return ceToJD(eyear, emonth, 0, getJDEpochOffset());
+}
+
+int32_t
+CECalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
+{
+    return LIMITS[field][limitType];
+}
+
+UBool
+CECalendar::inDaylightTime(UErrorCode& status) const
+{
+    if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) {
+        return FALSE;
+    }
+
+    // Force an update of the state of the Calendar.
+    ((CECalendar*)this)->complete(status); // cast away const
+
+    return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
+}
+
+UBool
+CECalendar::haveDefaultCentury() const
+{
+    return TRUE;
+}
+
+//-------------------------------------------------------------------------
+// Calendar system Conversion methods...
+//-------------------------------------------------------------------------
+int32_t
+CECalendar::ceToJD(int32_t year, int32_t month, int32_t date, int32_t jdEpochOffset)
+{
+    // handle month > 12, < 0 (e.g. from add/set)
+    if ( month >= 0 ) {
+        year += month/13;
+        month %= 13;
+    } else {
+        ++month;
+        year += month/13 - 1;
+        month = month%13 + 12;
+    }
+    return (int32_t) (
+        jdEpochOffset                   // difference from Julian epoch to 1,1,1
+        + 365 * year                    // number of days from years
+        + ClockMath::floorDivide(year, 4)    // extra day of leap year
+        + 30 * month                    // number of days from months (months are 0-based)
+        + date - 1                      // number of days for present month (1 based)
+        );
+}
+
+void
+CECalendar::jdToCE(int32_t julianDay, int32_t jdEpochOffset, int32_t& year, int32_t& month, int32_t& day)
+{
+    int32_t c4; // number of 4 year cycle (1461 days)
+    int32_t r4; // remainder of 4 year cycle, always positive
+
+    c4 = ClockMath::floorDivide(julianDay - jdEpochOffset, 1461, r4);
+
+    year = 4 * c4 + (r4/365 - r4/1460); // 4 * <number of 4year cycle> + <years within the last cycle>
+
+    int32_t doy = (r4 == 1460) ? 365 : (r4 % 365); // days in present year
+
+    month = doy / 30;       // 30 -> Coptic/Ethiopic month length up to 12th month
+    day = (doy % 30) + 1;   // 1-based days in a month
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+//eof