chromium/third_party/icu/source/i18n/chnsecal.cpp

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
 ******************************************************************************
 * Copyright (C) 2007-2014, International Business Machines Corporation
 * and others. All Rights Reserved.
 ******************************************************************************
 *
 * File CHNSECAL.CPP
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   9/18/2007  ajmacher         ported from java ChineseCalendar
 *****************************************************************************
 */

#include "chnsecal.h"

#include <cstdint>

#if !UCONFIG_NO_FORMATTING

#include "umutex.h"
#include <float.h>
#include "gregoimp.h" // Math
#include "astro.h" // CalendarAstronomer
#include "unicode/simpletz.h"
#include "uhash.h"
#include "ucln_in.h"
#include "cstring.h"

// Debugging
#ifdef U_DEBUG_CHNSECAL
# include <stdio.h>
# include <stdarg.h>
static void debug_chnsecal_loc(const char *f, int32_t l)
{
    fprintf(stderr, "%s:%d: ", f, l);
}

static void debug_chnsecal_msg(const char *pat, ...)
{
    va_list ap;
    va_start(ap, pat);
    vfprintf(stderr, pat, ap);
    fflush(stderr);
}
// must use double parens, i.e.:  U_DEBUG_CHNSECAL_MSG(("four is: %d",4));
#define U_DEBUG_CHNSECAL_MSG …
#else
#define U_DEBUG_CHNSECAL_MSG(x) …
#endif


// --- The cache --
static icu::UMutex astroLock;
static icu::CalendarAstronomer *gChineseCalendarAstro = …;

// Lazy Creation & Access synchronized by class CalendarCache with a mutex.
static icu::CalendarCache *gChineseCalendarWinterSolsticeCache = …;
static icu::CalendarCache *gChineseCalendarNewYearCache = …;

static icu::TimeZone *gChineseCalendarZoneAstroCalc = …;
static icu::UInitOnce gChineseCalendarZoneAstroCalcInitOnce { … };

/**
 * The start year of the Chinese calendar, the 61st year of the reign
 * of Huang Di.  Some sources use the first year of his reign,
 * resulting in EXTENDED_YEAR values 60 years greater and ERA (cycle)
 * values one greater.
 */
static const int32_t CHINESE_EPOCH_YEAR = …; // Gregorian year

/**
 * The offset from GMT in milliseconds at which we perform astronomical
 * computations.  Some sources use a different historically accurate
 * offset of GMT+7:45:40 for years before 1929; we do not do this.
 */
static const int32_t CHINA_OFFSET = …;

/**
 * Value to be added or subtracted from the local days of a new moon to
 * get close to the next or prior new moon, but not cross it.  Must be
 * >= 1 and < CalendarAstronomer.SYNODIC_MONTH.
 */
static const int32_t SYNODIC_GAP = …;


U_CDECL_BEGIN
static UBool calendar_chinese_cleanup() { … }
U_CDECL_END

U_NAMESPACE_BEGIN

#endif