/*
**********************************************************************
* Copyright (c) 2003-2008, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Author: Alan Liu
* Created: September 2 2003
* Since: ICU 2.8
**********************************************************************
*/
#include "gregoimp.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/ucal.h"
#include "uresimp.h"
#include "cstring.h"
#include "uassert.h"
#if defined(U_DEBUG_CALDATA)
#include <stdio.h>
#endif
U_NAMESPACE_BEGIN
int32_t ClockMath::floorDivide(int32_t numerator, int32_t denominator) {
return (numerator >= 0) ?
numerator / denominator : ((numerator + 1) / denominator) - 1;
}
int32_t ClockMath::floorDivide(double numerator, int32_t denominator,
int32_t& remainder) {
double quotient;
quotient = uprv_floor(numerator / denominator);
remainder = (int32_t) (numerator - (quotient * denominator));
return (int32_t) quotient;
}
double ClockMath::floorDivide(double dividend, double divisor,
double& remainder) {
// Only designed to work for positive divisors
U_ASSERT(divisor > 0);
double quotient = floorDivide(dividend, divisor);
remainder = dividend - (quotient * divisor);
// N.B. For certain large dividends, on certain platforms, there
// is a bug such that the quotient is off by one. If you doubt
// this to be true, set a breakpoint below and run cintltst.
if (remainder < 0 || remainder >= divisor) {
// E.g. 6.7317038241449352e+022 / 86400000.0 is wrong on my
// machine (too high by one). 4.1792057231752762e+024 /
// 86400000.0 is wrong the other way (too low).
double q = quotient;
quotient += (remainder < 0) ? -1 : +1;
if (q == quotient) {
// For quotients > ~2^53, we won't be able to add or
// subtract one, since the LSB of the mantissa will be >
// 2^0; that is, the exponent (base 2) will be larger than
// the length, in bits, of the mantissa. In that case, we
// can't give a correct answer, so we set the remainder to
// zero. This has the desired effect of making extreme
// values give back an approximate answer rather than
// crashing. For example, UDate values above a ~10^25
// might all have a time of midnight.
remainder = 0;
} else {
remainder = dividend - (quotient * divisor);
}
}
U_ASSERT(0 <= remainder && remainder < divisor);
return quotient;
}
const int32_t JULIAN_1_CE = 1721426; // January 1, 1 CE Gregorian
const int32_t JULIAN_1970_CE = 2440588; // January 1, 1970 CE Gregorian
const int16_t Grego::DAYS_BEFORE[24] =
{0,31,59,90,120,151,181,212,243,273,304,334,
0,31,60,91,121,152,182,213,244,274,305,335};
const int8_t Grego::MONTH_LENGTH[24] =
{31,28,31,30,31,30,31,31,30,31,30,31,
31,29,31,30,31,30,31,31,30,31,30,31};
double Grego::fieldsToDay(int32_t year, int32_t month, int32_t dom) {
int32_t y = year - 1;
double julian = 365 * y + ClockMath::floorDivide(y, 4) + (JULIAN_1_CE - 3) + // Julian cal
ClockMath::floorDivide(y, 400) - ClockMath::floorDivide(y, 100) + 2 + // => Gregorian cal
DAYS_BEFORE[month + (isLeapYear(year) ? 12 : 0)] + dom; // => month/dom
return julian - JULIAN_1970_CE; // JD => epoch day
}
void Grego::dayToFields(double day, int32_t& year, int32_t& month,
int32_t& dom, int32_t& dow, int32_t& doy) {
// Convert from 1970 CE epoch to 1 CE epoch (Gregorian calendar)
day += JULIAN_1970_CE - JULIAN_1_CE;
// Convert from the day number to the multiple radix
// representation. We use 400-year, 100-year, and 4-year cycles.
// For example, the 4-year cycle has 4 years + 1 leap day; giving
// 1461 == 365*4 + 1 days.
int32_t n400 = ClockMath::floorDivide(day, 146097, doy); // 400-year cycle length
int32_t n100 = ClockMath::floorDivide(doy, 36524, doy); // 100-year cycle length
int32_t n4 = ClockMath::floorDivide(doy, 1461, doy); // 4-year cycle length
int32_t n1 = ClockMath::floorDivide(doy, 365, doy);
year = 400*n400 + 100*n100 + 4*n4 + n1;
if (n100 == 4 || n1 == 4) {
doy = 365; // Dec 31 at end of 4- or 400-year cycle
} else {
++year;
}
UBool isLeap = isLeapYear(year);
// Gregorian day zero is a Monday.
dow = (int32_t) uprv_fmod(day + 1, 7);
dow += (dow < 0) ? (UCAL_SUNDAY + 7) : UCAL_SUNDAY;
// Common Julian/Gregorian calculation
int32_t correction = 0;
int32_t march1 = isLeap ? 60 : 59; // zero-based DOY for March 1
if (doy >= march1) {
correction = isLeap ? 1 : 2;
}
month = (12 * (doy + correction) + 6) / 367; // zero-based month
dom = doy - DAYS_BEFORE[month + (isLeap ? 12 : 0)] + 1; // one-based DOM
doy++; // one-based doy
}
void Grego::timeToFields(UDate time, int32_t& year, int32_t& month,
int32_t& dom, int32_t& dow, int32_t& doy, int32_t& mid) {
double millisInDay;
double day = ClockMath::floorDivide((double)time, (double)U_MILLIS_PER_DAY, millisInDay);
mid = (int32_t)millisInDay;
dayToFields(day, year, month, dom, dow, doy);
}
int32_t Grego::dayOfWeek(double day) {
int32_t dow;
ClockMath::floorDivide(day + UCAL_THURSDAY, 7, dow);
return (dow == 0) ? UCAL_SATURDAY : dow;
}
int32_t Grego::dayOfWeekInMonth(int32_t year, int32_t month, int32_t dom) {
int32_t weekInMonth = (dom + 6)/7;
if (weekInMonth == 4) {
if (dom + 7 > monthLength(year, month)) {
weekInMonth = -1;
}
} else if (weekInMonth == 5) {
weekInMonth = -1;
}
return weekInMonth;
}
/* ---- CalendarData ------ */
#define U_CALENDAR_KEY "calendar"
#define U_GREGORIAN_KEY "gregorian"
#define U_FORMAT_KEY "format"
#define U_DEFAULT_KEY "default"
#define U_CALENDAR_DATA ((char*)0)
// CalendarData::CalendarData(const Locale& loc, UErrorCode& status)
// : fFillin(NULL), fBundle(NULL), fFallback(NULL) {
// initData(loc.getBaseName(), (char*) "???", status);
// }
CalendarData::CalendarData(const Locale& loc, const char *type, UErrorCode& status)
: fFillin(NULL), fOtherFillin(NULL), fBundle(NULL), fFallback(NULL) {
initData(loc.getBaseName(), type, status);
}
void CalendarData::initData(const char *locale, const char *type, UErrorCode& status) {
fOtherFillin = ures_open(U_CALENDAR_DATA, locale, &status);
fFillin = ures_getByKey(fOtherFillin, U_CALENDAR_KEY, fFillin, &status);
if((type != NULL) &&
(*type != '\0') &&
(uprv_strcmp(type, U_GREGORIAN_KEY)))
{
fBundle = ures_getByKeyWithFallback(fFillin, type, NULL, &status);
fFallback = ures_getByKeyWithFallback(fFillin, U_GREGORIAN_KEY, NULL, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: CalendarData(%s, %s, %s) -> main(%p, %s)=%s, fallback(%p, %s)=%s\n",
this, locale, type, u_errorName(status), fBundle, type, fBundle?ures_getLocale(fBundle, &status):"",
fFallback, U_GREGORIAN_KEY, fFallback?ures_getLocale(fFallback, &status):"");
#endif
} else {
fBundle = ures_getByKeyWithFallback(fFillin, U_GREGORIAN_KEY, NULL, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: CalendarData(%s, %s, %s) -> main(%p, %s)=%s, fallback = NULL\n",
this, locale, type, u_errorName(status), fBundle, U_GREGORIAN_KEY, fBundle?ures_getLocale(fBundle, &status):"" );
#endif
}
}
CalendarData::~CalendarData() {
ures_close(fFillin);
ures_close(fBundle);
ures_close(fFallback);
ures_close(fOtherFillin);
}
UResourceBundle*
CalendarData::getByKey(const char *key, UErrorCode& status) {
if(U_FAILURE(status)) {
return NULL;
}
if(fBundle) {
fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s -> %s - from MAIN %s\n",this, key, u_errorName(status), ures_getLocale(fFillin, &status));
#endif
}
if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) {
status = U_ZERO_ERROR; // retry with fallback (gregorian)
fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s -> %s - from FALLBACK %s\n",this, key, u_errorName(status), ures_getLocale(fFillin, &status));
#endif
}
return fFillin;
}
UResourceBundle* CalendarData::getByKey2(const char *key, const char *subKey, UErrorCode& status) {
if(U_FAILURE(status)) {
return NULL;
}
if(fBundle) {
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: //\n");
#endif
fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status);
fOtherFillin = ures_getByKeyWithFallback(fFillin, U_FORMAT_KEY, fOtherFillin, &status);
fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s/format/%s -> %s - from MAIN %s\n", this, key, subKey, u_errorName(status), ures_getLocale(fFillin, &status));
#endif
}
if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) {
status = U_ZERO_ERROR; // retry with fallback (gregorian)
fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status);
fOtherFillin = ures_getByKeyWithFallback(fFillin, U_FORMAT_KEY, fOtherFillin, &status);
fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s/format/%s -> %s - from FALLBACK %s\n",this, key, subKey, u_errorName(status), ures_getLocale(fFillin,&status));
#endif
}
//// handling of 'default' keyword on failure: Commented out for 3.0.
// if((status == U_MISSING_RESOURCE_ERROR) &&
// uprv_strcmp(subKey,U_DEFAULT_KEY)) { // avoid recursion
// #if defined (U_DEBUG_CALDATA)
// fprintf(stderr, "%p: - attempting fallback -\n", this);
// fflush(stderr);
// #endif
// UErrorCode subStatus = U_ZERO_ERROR;
// int32_t len;
// char kwBuf[128] = "";
// const UChar *kw;
// /* fFillin = */ getByKey2(key, U_DEFAULT_KEY, subStatus);
// kw = ures_getString(fFillin, &len, &subStatus);
// if(len>126) { // too big
// len = 0;
// }
// if(U_SUCCESS(subStatus) && (len>0)) {
// u_UCharsToChars(kw, kwBuf, len+1);
// if(*kwBuf && uprv_strcmp(kwBuf,subKey)) {
// #if defined (U_DEBUG_CALDATA)
// fprintf(stderr, "%p: trying %s/format/default -> \"%s\"\n",this, key, kwBuf);
// #endif
// // now try again with the default
// status = U_ZERO_ERROR;
// /* fFillin = */ getByKey2(key, kwBuf, status);
// }
// #if defined (U_DEBUG_CALDATA)
// } else {
// fprintf(stderr, "%p: could not load %s/format/default - fail out (%s)\n",this, key, kwBuf, u_errorName(status));
// #endif
// }
// }
return fFillin;
}
UResourceBundle* CalendarData::getByKey3(const char *key, const char *contextKey, const char *subKey, UErrorCode& status) {
if(U_FAILURE(status)) {
return NULL;
}
if(fBundle) {
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: //\n");
#endif
fFillin = ures_getByKeyWithFallback(fBundle, key, fFillin, &status);
fOtherFillin = ures_getByKeyWithFallback(fFillin, contextKey, fOtherFillin, &status);
fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s/%s/%s -> %s - from MAIN %s\n", this, key, contextKey, subKey, u_errorName(status), ures_getLocale(fFillin, &status));
#endif
}
if(fFallback && (status == U_MISSING_RESOURCE_ERROR)) {
status = U_ZERO_ERROR; // retry with fallback (gregorian)
fFillin = ures_getByKeyWithFallback(fFallback, key, fFillin, &status);
fOtherFillin = ures_getByKeyWithFallback(fFillin, contextKey, fOtherFillin, &status);
fFillin = ures_getByKeyWithFallback(fOtherFillin, subKey, fFillin, &status);
#if defined (U_DEBUG_CALDATA)
fprintf(stderr, "%p: get %s/%s/%s -> %s - from FALLBACK %s\n",this, key, contextKey, subKey, u_errorName(status), ures_getLocale(fFillin,&status));
#endif
}
return fFillin;
}
U_NAMESPACE_END
#endif
//eof