io.questdb.std.datetime.microtime.Timestamps Maven / Gradle / Ivy
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*
* Copyright (c) 2014-2019 Appsicle
* Copyright (c) 2019-2022 QuestDB
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
package io.questdb.std.datetime.microtime;
import io.questdb.std.*;
import io.questdb.std.datetime.DateLocale;
import io.questdb.std.datetime.TimeZoneRules;
import io.questdb.std.str.CharSink;
import static io.questdb.std.datetime.TimeZoneRuleFactory.RESOLUTION_MICROS;
final public class Timestamps {
public static final long WEEK_MICROS = 604800000000L;
public static final long DAY_MICROS = 86400000000L;
public static final long HOUR_MICROS = 3600000000L;
public static final long MINUTE_MICROS = 60000000;
public static final long SECOND_MICROS = 1000000;
public static final int SECOND_MILLIS = 1000;
public static final long MILLI_MICROS = 1000;
public static final long FIRST_CENTURY_MICROS = -62135596800000000L;
public static final int STATE_INIT = 0;
public static final int STATE_UTC = 1;
public static final int STATE_GMT = 2;
public static final int STATE_HOUR = 3;
public static final int STATE_DELIM = 4;
public static final int STATE_MINUTE = 5;
public static final int STATE_END = 6;
public static final int STATE_SIGN = 7;
public static final long O3_MIN_TS = 0L;
public static final long STARTUP_TIMESTAMP;
private static final long AVG_YEAR_MICROS = (long) (365.2425 * DAY_MICROS);
private static final long HALF_YEAR_MICROS = AVG_YEAR_MICROS / 2;
private static final long EPOCH_MICROS = 1970L * AVG_YEAR_MICROS;
private static final long HALF_EPOCH_MICROS = EPOCH_MICROS / 2;
private static final long YEAR_MICROS = 365 * DAY_MICROS;
private static final long LEAP_YEAR_MICROS = 366 * DAY_MICROS;
private static final int DAY_HOURS = 24;
private static final int HOUR_MINUTES = 60;
private static final int MINUTE_SECONDS = 60;
private static final int DAYS_0000_TO_1970 = 719527;
private static final int[] DAYS_PER_MONTH = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
private static final long[] MIN_MONTH_OF_YEAR_MICROS = new long[12];
private static final long[] MAX_MONTH_OF_YEAR_MICROS = new long[12];
private static final char BEFORE_ZERO = '0' - 1;
private static final char AFTER_NINE = '9' + 1;
private Timestamps() {
}
public static long addDays(long micros, int days) {
return micros + days * DAY_MICROS;
}
public static long addHours(long micros, int hours) {
return micros + hours * HOUR_MICROS;
}
public static long addMinutes(long micros, int minutes) {
return micros + minutes * MINUTE_MICROS;
}
public static long addMonths(final long micros, int months) {
if (months == 0) {
return micros;
}
int y = Timestamps.getYear(micros);
boolean l = Timestamps.isLeapYear(y);
int m = getMonthOfYear(micros, y, l);
int _y;
int _m = m - 1 + months;
if (_m > -1) {
_y = y + _m / 12;
_m = (_m % 12) + 1;
} else {
_y = y + _m / 12 - 1;
_m = -_m % 12;
if (_m == 0) {
_m = 12;
}
_m = 12 - _m + 1;
if (_m == 1) {
_y += 1;
}
}
int _d = getDayOfMonth(micros, y, m, l);
int maxDay = getDaysPerMonth(_m, isLeapYear(_y));
if (_d > maxDay) {
_d = maxDay;
}
return toMicros(_y, _m, _d) + getTimeMicros(micros) + (micros < 0 ? 1 : 0);
}
public static long addPeriod(long lo, char type, int period) {
switch (type) {
case 's':
return Timestamps.addSeconds(lo, period);
case 'm':
return Timestamps.addMinutes(lo, period);
case 'h':
return Timestamps.addHours(lo, period);
case 'd':
return Timestamps.addDays(lo, period);
case 'w':
return Timestamps.addWeeks(lo, period);
case 'M':
return Timestamps.addMonths(lo, period);
case 'y':
return Timestamps.addYear(lo, period);
default:
return Numbers.LONG_NaN;
}
}
public static long addSeconds(long micros, int seconds) {
return micros + seconds * SECOND_MICROS;
}
public static long addWeeks(long micros, int weeks) {
return micros + weeks * WEEK_MICROS;
}
public static long addYear(long micros, int years) {
if (years == 0) {
return micros;
}
int y = getYear(micros);
int m;
boolean leap1 = isLeapYear(y);
boolean leap2 = isLeapYear(y + years);
return yearMicros(y + years, leap2)
+ monthOfYearMicros(m = getMonthOfYear(micros, y, leap1), leap2)
+ (getDayOfMonth(micros, y, m, leap1) - 1) * DAY_MICROS
+ getTimeMicros(micros)
+ (micros < 0 ? 1 : 0);
}
public static long ceilDD(long micros) {
int y, m;
boolean l;
return yearMicros(y = getYear(micros), l = isLeapYear(y))
+ monthOfYearMicros(m = getMonthOfYear(micros, y, l), l)
+ (getDayOfMonth(micros, y, m, l)) * DAY_MICROS;
}
public static long ceilHH(long micros) {
return floorHH(micros) + HOUR_MICROS;
}
public static long ceilMI(long micros) {
return floorMI(micros) + MINUTE_MICROS;
}
public static long ceilMM(long micros) {
int y, m;
boolean l;
return yearMicros(y = getYear(micros), l = isLeapYear(y))
+ monthOfYearMicros(m = getMonthOfYear(micros, y, l), l)
+ (getDaysPerMonth(m, l)) * DAY_MICROS;
}
public static long ceilMS(long micros) {
return floorMS(micros) + MILLI_MICROS;
}
public static long ceilSS(long micros) {
return floorSS(micros) + SECOND_MICROS;
}
public static long ceilYYYY(long micros) {
int y;
boolean l;
return yearMicros(y = getYear(micros), l = isLeapYear(y))
+ monthOfYearMicros(12, l)
+ (DAYS_PER_MONTH[11]) * DAY_MICROS;
}
public static long endOfYear(int year) {
return toMicros(year, 12, 31, 23, 59) + 59 * SECOND_MILLIS + 999999L;
}
/**
* Floor timestamp to the first day of the century and set to time to 00:00:00.000Z
*
* Example: Timestamp representing 2008-01-01T04:15:11.123Z will be floored to
* 2001-01-01T00:00:00.000Z
*
* @param micros timestamp to floor in microseconds since epoch
* @return given timestamp floored to the first day of the century with time set to 00:00:00.000
*/
public static long floorCentury(long micros) {
int year = getYear(micros);
int centuryFirstYear = (((year + 99) / 100) * 100) - 99;
boolean leapYear = isLeapYear(centuryFirstYear);
return yearMicros(centuryFirstYear, leapYear);
}
public static long floorDD(long micros) {
long result = micros - getTimeMicros(micros);
return Math.min(result, micros);
}
/**
* Floor timestamp to Monday of the same week and set time to 00:00:00.000Z
*
* Example: Timestamp representing 2008-01-01T04:15:11.123Z (=Tuesday) will be floored to
* 2007-12-31T00:00:00.000Z (=Monday of the same week)
*
* @param micros timestamp to floor in microseconds since epoch
* @return given timestamp floored to Monday of the same week and time set to 00:00:00.000Z
*/
public static long floorDOW(long micros) {
long l = previousOrSameDayOfWeek(micros, 1);
return floorDD(l);
}
/**
* Floor timestamp to the first day of the decade and set to time to 00:00:00.000Z
*
* Example: Timestamp representing 2008-01-01T04:15:11.123Z will be floored to
* 2000-01-01T00:00:00.000Z
*
* @param micros timestamp to floor in microseconds since epoch
* @return given timestamp floored to the first day of the decade with time set to 00:00:00.000
*/
public static long floorDecade(long micros) {
int year = getYear(micros);
int decadeFirstYear = (year / 10) * 10;
boolean leapYear = isLeapYear(decadeFirstYear);
return yearMicros(decadeFirstYear, leapYear);
}
public static long floorHH(long micros) {
return micros - micros % HOUR_MICROS;
}
public static long floorMI(long micros) {
return micros - micros % MINUTE_MICROS;
}
public static long floorMM(long micros) {
int y;
boolean l;
return yearMicros(y = getYear(micros), l = isLeapYear(y)) + monthOfYearMicros(getMonthOfYear(micros, y, l), l);
}
public static long floorMS(long micros) {
return micros - micros % MILLI_MICROS;
}
/**
* Floor timestamp to the first day of the millennia and set to time to 00:00:00.000Z
*
* Example: Timestamp representing 2108-01-01T04:15:11.123Z will be floored to
* 2001-01-01T00:00:00.000Z
*
* @param micros timestamp to floor in microseconds since epoch
* @return given timestamp floored to the first day of the millennia with time set to 00:00:00.000
*/
public static long floorMillennium(long micros) {
int year = getYear(micros);
int millenniumFirstYear = (((year + 999) / 1000) * 1000) - 999;
boolean leapYear = isLeapYear(millenniumFirstYear);
return yearMicros(millenniumFirstYear, leapYear);
}
/**
* Floor timestamp to the first day of the quarter and set time to 00:00:00.000Z
*
* Example: Timestamp representing 2008-05-21T04:15:11.123Z will be floored to
* 2008-04-01T00:00:00.000Z as that's the 1st day of the same quarter as the original date.
*
* @param micros timestamp to floor in microseconds since epoch
* @return given timestamp floored to the first day of the quarter with time set to 00:00:00.000Z
*/
public static long floorQuarter(long micros) {
int year = getYear(micros);
boolean leapYear = isLeapYear(year);
int monthOfYear = getMonthOfYear(micros, year, leapYear);
int q = (monthOfYear - 1) / 3;
int month = (3 * q) + 1;
return yearMicros(year, leapYear) + monthOfYearMicros(month, leapYear);
}
public static long floorSS(long micros) {
return micros - micros % SECOND_MICROS;
}
public static long floorYYYY(long micros) {
int y;
return yearMicros(y = getYear(micros), isLeapYear(y));
}
public static int getCentury(long micros) {
final int year = getYear(micros);
int century = year / 100;
if (year > century * 100) {
century++;
}
if (micros >= Timestamps.FIRST_CENTURY_MICROS) {
return century;
}
return century - 1;
}
public static int getDayOfMonth(long micros, int year, int month, boolean leap) {
long yearMicros = yearMicros(year, leap);
yearMicros += monthOfYearMicros(month, leap);
return (int) ((micros - yearMicros) / DAY_MICROS) + 1;
}
public static int getDayOfYear(long micros) {
int year = getYear(micros);
boolean leap = isLeapYear(year);
long yearStart = yearMicros(year, leap);
return (int)((micros - yearStart) / DAY_MICROS) + 1;
}
public static int getWeekOfYear(long micros) {
return getDayOfYear(micros) / 7 + 1;
}
public static int getWeekOfMonth(long micros) {
int year = getYear(micros);
boolean leap = isLeapYear(year);
return getDayOfMonth(micros, year, getMonthOfYear(micros, year, leap), leap) / 7 + 1;
}
public static int getDayOfTheWeekOfEndOfYear(int year) {
return (year + Math.abs(year / 4) + Math.abs(year / 100) + Math.abs(year / 400)) % 7;
}
public static int getDayOfWeek(long micros) {
// 1970-01-01 is Thursday.
long d;
if (micros > -1) {
d = micros / DAY_MICROS;
} else {
d = (micros - (DAY_MICROS - 1)) / DAY_MICROS;
if (d < -3) {
return 7 + (int) ((d + 4) % 7);
}
}
return 1 + (int) ((d + 3) % 7);
}
public static int getDayOfWeekSundayFirst(long micros) {
// 1970-01-01 is Thursday.
long d;
if (micros > -1) {
d = micros / DAY_MICROS;
} else {
d = (micros - (DAY_MICROS - 1)) / DAY_MICROS;
if (d < -4) {
return 7 + (int) ((d + 5) % 7);
}
}
return 1 + (int) ((d + 4) % 7);
}
public static long getDaysBetween(long a, long b) {
return Math.abs(a - b) / DAY_MICROS;
}
/**
* Days in a given month. This method expects you to know if month is in leap year.
*
* @param m month from 1 to 12
* @param leap true if this is for leap year
* @return number of days in month.
*/
public static int getDaysPerMonth(int m, boolean leap) {
return leap & m == 2 ? 29 : DAYS_PER_MONTH[m - 1];
}
public static int getDecade(long micros) {
return getYear(micros) / 10;
}
public static int getDow(long micros) {
return getDayOfWeekSundayFirst(micros) - 1;
}
public static int getDoy(long micros) {
final int year = getYear(micros);
final boolean leap = isLeapYear(year);
final long yearStart = yearMicros(year, leap);
return (int) ((micros - yearStart) / DAY_MICROS) + 1;
}
public static int getHourOfDay(long micros) {
if (micros > -1) {
return (int) ((micros / HOUR_MICROS) % DAY_HOURS);
} else {
return DAY_HOURS - 1 + (int) (((micros + 1) / HOUR_MICROS) % DAY_HOURS);
}
}
public static long getHoursBetween(long a, long b) {
return Math.abs(a - b) / HOUR_MICROS;
}
// Each ISO 8601 week-numbering year begins with the Monday of the week containing the 4th of January,
// so in early January or late December the ISO year may be different from the Gregorian year.
// See the getWeek() method for more information.
public static int getIsoYear(long micros) {
int w = (10 + getDoy(micros) - getDayOfWeek(micros)) / 7;
int y = getYear(micros);
if (w < 1) {
return y - 1;
}
if (w > getWeeks(y)) {
return y + 1;
}
return y;
}
public static long getMicrosOfMinute(long micros) {
if (micros > -1) {
return micros % MINUTE_MICROS;
} else {
return MINUTE_MICROS - 1 + (micros + 1) % MINUTE_MICROS;
}
}
public static int getMicrosOfSecond(long micros) {
if (micros > -1) {
return (int) (micros % MILLI_MICROS);
} else {
return (int) (MILLI_MICROS - 1 + ((micros + 1) % MILLI_MICROS));
}
}
// Years in the 1900s are in the second millennium. The third millennium started January 1, 2001.
public static int getMillennium(long micros) {
int year = getYear(micros);
int millenniumFirstYear = (((year + 999) / 1000) * 1000) - 999;
return millenniumFirstYear / 1000 + 1;
}
public static long getMillisOfMinute(long micros) {
return getMicrosOfMinute(micros) / 1000;
}
public static int getMillisOfSecond(long micros) {
if (micros > -1) {
return (int) ((micros / MILLI_MICROS) % SECOND_MILLIS);
} else {
return SECOND_MILLIS - 1 + (int) (((micros + 1) / MILLI_MICROS) % SECOND_MILLIS);
}
}
public static int getMinuteOfHour(long micros) {
if (micros > -1) {
return (int) ((micros / MINUTE_MICROS) % HOUR_MINUTES);
} else {
return HOUR_MINUTES - 1 + (int) (((micros + 1) / MINUTE_MICROS) % HOUR_MINUTES);
}
}
public static long getMinutesBetween(long a, long b) {
return Math.abs(a - b) / MINUTE_MICROS;
}
public static int getMonthOfYear(long micros) {
final int y = Timestamps.getYear(micros);
final boolean leap = Timestamps.isLeapYear(y);
return getMonthOfYear(micros, y, leap);
}
/**
* Calculates month of year from absolute micros.
*
* @param micros micros since 1970
* @param year year of month
* @param leap true if year was leap
* @return month of year
*/
public static int getMonthOfYear(long micros, int year, boolean leap) {
int i = (int) (((micros - yearMicros(year, leap)) / 1000) >> 10);
return leap
? ((i < 182 * 84375)
? ((i < 91 * 84375)
? ((i < 31 * 84375) ? 1 : (i < 60 * 84375) ? 2 : 3)
: ((i < 121 * 84375) ? 4 : (i < 152 * 84375) ? 5 : 6))
: ((i < 274 * 84375)
? ((i < 213 * 84375) ? 7 : (i < 244 * 84375) ? 8 : 9)
: ((i < 305 * 84375) ? 10 : (i < 335 * 84375) ? 11 : 12)))
: ((i < 181 * 84375)
? ((i < 90 * 84375)
? ((i < 31 * 84375) ? 1 : (i < 59 * 84375) ? 2 : 3)
: ((i < 120 * 84375) ? 4 : (i < 151 * 84375) ? 5 : 6))
: ((i < 273 * 84375)
? ((i < 212 * 84375) ? 7 : (i < 243 * 84375) ? 8 : 9)
: ((i < 304 * 84375) ? 10 : (i < 334 * 84375) ? 11 : 12)));
}
public static long getMonthsBetween(long a, long b) {
if (b < a) {
return getMonthsBetween(b, a);
}
int aYear = getYear(a);
int bYear = getYear(b);
boolean aLeap = isLeapYear(aYear);
boolean bLeap = isLeapYear(bYear);
int aMonth = getMonthOfYear(a, aYear, aLeap);
int bMonth = getMonthOfYear(b, bYear, bLeap);
long aResidual = a - yearMicros(aYear, aLeap) - monthOfYearMicros(aMonth, aLeap);
long bResidual = b - yearMicros(bYear, bLeap) - monthOfYearMicros(bMonth, bLeap);
long months = 12L * (bYear - aYear) + (bMonth - aMonth);
if (aResidual > bResidual) {
return months - 1;
} else {
return months;
}
}
public static long getPeriodBetween(char type, long start, long end) {
switch (type) {
case 's':
return Timestamps.getSecondsBetween(start, end);
case 'm':
return Timestamps.getMinutesBetween(start, end);
case 'h':
return Timestamps.getHoursBetween(start, end);
case 'd':
return Timestamps.getDaysBetween(start, end);
case 'w':
return Timestamps.getWeeksBetween(start, end);
case 'M':
return Timestamps.getMonthsBetween(start, end);
case 'y':
return Timestamps.getYearsBetween(start, end);
default:
return Numbers.LONG_NaN;
}
}
// The quarter of the year (1–4) that the date is in
public static int getQuarter(long micros) {
final int month = getMonthOfYear(micros);
return ((month - 1) / 3) + 1;
}
public static int getSecondOfMinute(long micros) {
if (micros > -1) {
return (int) ((micros / SECOND_MICROS) % MINUTE_SECONDS);
} else {
return MINUTE_SECONDS - 1 + (int) (((micros + 1) / SECOND_MICROS) % MINUTE_SECONDS);
}
}
public static long getSecondsBetween(long a, long b) {
return Math.abs(a - b) / SECOND_MICROS;
}
// https://en.wikipedia.org/wiki/ISO_week_date
public static int getWeek(long micros) {
int w = (10 + getDoy(micros) - getDayOfWeek(micros)) / 7;
int y = getYear(micros);
if (w < 1) {
return getWeeks(y - 1);
}
if (w > getWeeks(y)) {
return 1;
}
return w;
}
public static int getWeeks(int y) {
if (getDayOfTheWeekOfEndOfYear(y) == 4 || getDayOfTheWeekOfEndOfYear(y - 1) == 3) {
return 53;
}
return 52;
}
public static long getWeeksBetween(long a, long b) {
return Math.abs(a - b) / WEEK_MICROS;
}
/**
* Calculates year number from micros.
*
* @param micros time micros.
* @return year
*/
public static int getYear(long micros) {
long mid = (micros >> 1) + HALF_EPOCH_MICROS;
if (mid < 0) {
mid = mid - HALF_YEAR_MICROS + 1;
}
int year = (int) (mid / HALF_YEAR_MICROS);
boolean leap = isLeapYear(year);
long yearStart = yearMicros(year, leap);
long diff = micros - yearStart;
if (diff < 0) {
year--;
} else if (diff >= YEAR_MICROS) {
yearStart += leap ? LEAP_YEAR_MICROS : YEAR_MICROS;
if (yearStart <= micros) {
year++;
}
}
return year;
}
public static long getYearsBetween(long a, long b) {
return getMonthsBetween(a, b) / 12;
}
/**
* Calculates if year is leap year using following algorithm:
*
* http://en.wikipedia.org/wiki/Leap_year
*
* @param year the year
* @return true if year is leap
*/
public static boolean isLeapYear(int year) {
return ((year & 3) == 0) && ((year % 100) != 0 || (year % 400) == 0);
}
public static long monthOfYearMicros(int month, boolean leap) {
return leap ? MAX_MONTH_OF_YEAR_MICROS[month - 1] : MIN_MONTH_OF_YEAR_MICROS[month - 1];
}
public static long nextOrSameDayOfWeek(long millis, int dow) {
int thisDow = getDayOfWeek(millis);
if (thisDow == dow) {
return millis;
}
if (thisDow < dow) {
return millis + (dow - thisDow) * DAY_MICROS;
} else {
return millis + (7 - (thisDow - dow)) * DAY_MICROS;
}
}
public static long parseOffset(CharSequence in) {
return parseOffset(in, 0, in.length());
}
public static long parseOffset(CharSequence in, int lo, int hi) {
int p = lo;
int state = STATE_INIT;
boolean negative = false;
int hour = 0;
int minute = 0;
try {
OUT:
while (p < hi) {
char c = in.charAt(p);
switch (state) {
case STATE_INIT:
switch (c) {
case 'U':
case 'u':
state = STATE_UTC;
break;
case 'G':
case 'g':
state = STATE_GMT;
break;
case 'Z':
case 'z':
state = STATE_END;
break;
case '+':
state = STATE_HOUR;
break;
case '-':
negative = true;
state = STATE_HOUR;
break;
default:
if (isDigit(c)) {
state = STATE_HOUR;
p--;
} else {
return Long.MIN_VALUE;
}
break;
}
p++;
break;
case STATE_UTC:
if (p > hi - 2 || Chars.noMatch(in, p, p + 2, "tc", 0, 2)) {
return Long.MIN_VALUE;
}
state = STATE_SIGN;
p += 2;
break;
case STATE_GMT:
if (p > hi - 2 || Chars.noMatch(in, p, p + 2, "mt", 0, 2)) {
return Long.MIN_VALUE;
}
state = STATE_SIGN;
p += 2;
break;
case STATE_SIGN:
switch (c) {
case '+':
break;
case '-':
negative = true;
break;
default:
return Long.MIN_VALUE;
}
p++;
state = STATE_HOUR;
break;
case STATE_HOUR:
if (isDigit(c) && p < hi - 1) {
hour = Numbers.parseInt(in, p, p + 2);
} else {
return Long.MIN_VALUE;
}
state = STATE_DELIM;
p += 2;
break;
case STATE_DELIM:
if (c == ':') {
state = STATE_MINUTE;
p++;
} else if (isDigit(c)) {
state = STATE_MINUTE;
} else {
return Long.MIN_VALUE;
}
break;
case STATE_MINUTE:
if (isDigit(c) && p < hi - 1) {
minute = Numbers.parseInt(in, p, p + 2);
} else {
return Long.MIN_VALUE;
}
p += 2;
state = STATE_END;
break OUT;
default:
return Long.MIN_VALUE;
}
}
} catch (NumericException e) {
return Long.MIN_VALUE;
}
switch (state) {
case STATE_DELIM:
case STATE_END:
if (hour > 23 || minute > 59) {
return Long.MIN_VALUE;
}
final int min = hour * 60 + minute;
return Numbers.encodeLowHighInts(negative ? -min : min, p - lo);
default:
return Long.MIN_VALUE;
}
}
public static long previousOrSameDayOfWeek(long micros, int dow) {
int thisDow = getDayOfWeek(micros);
if (thisDow == dow) {
return micros;
}
if (thisDow < dow) {
return micros - (7 + (thisDow - dow)) * DAY_MICROS;
} else {
return micros - (thisDow - dow) * DAY_MICROS;
}
}
public static long toMicros(int y, int m, int d, int h, int mi) {
return toMicros(y, isLeapYear(y), m, d, h, mi);
}
public static long toMicros(int y, boolean leap, int m, int d, int h, int mi) {
return yearMicros(y, leap) + monthOfYearMicros(m, leap) + (d - 1) * DAY_MICROS + h * HOUR_MICROS + mi * MINUTE_MICROS;
}
public static long toMicros(
int y,
boolean leap,
int day,
int month,
int hour,
int min,
int sec,
int millis,
int micros
) {
int maxDay = Math.min(day, getDaysPerMonth(month, leap)) - 1;
return yearMicros(y, leap)
+ monthOfYearMicros(month, leap)
+ maxDay * DAY_MICROS
+ hour * HOUR_MICROS
+ min * MINUTE_MICROS
+ sec * SECOND_MICROS
+ millis * MILLI_MICROS
+ micros;
}
public static long toMicros(int y, int m, int d) {
boolean l = isLeapYear(y);
return yearMicros(y, l) + monthOfYearMicros(m, l) + (d - 1) * DAY_MICROS;
}
public static String toString(long micros) {
CharSink sink = Misc.getThreadLocalBuilder();
TimestampFormatUtils.appendDateTime(sink, micros);
return sink.toString();
}
public static long toTimezone(long utcTimestamp, DateLocale locale, CharSequence timezone) throws NumericException {
return toTimezone(utcTimestamp, locale, timezone, 0, timezone.length());
}
public static long toTimezone(
long utc,
DateLocale locale,
CharSequence timezone,
int lo,
int hi
) throws NumericException {
final long offset;
long l = parseOffset(timezone, lo, hi);
if (l == Long.MIN_VALUE) {
return utc + locale.getZoneRules(
Numbers.decodeLowInt(locale.matchZone(timezone, lo, hi)), RESOLUTION_MICROS
).getOffset(utc);
}
offset = Numbers.decodeLowInt(l) * MINUTE_MICROS;
return utc + offset;
}
public static long toUTC(long timestampWithTimezone, DateLocale locale, CharSequence timezone) throws NumericException {
return toUTC(timestampWithTimezone, locale, timezone, 0, timezone.length());
}
public static long toUTC(
long timestampWithTimezone,
DateLocale locale,
CharSequence timezone,
int lo,
int hi
) throws NumericException {
long offset;
long l = parseOffset(timezone, lo, hi);
if (l == Long.MIN_VALUE) {
TimeZoneRules zoneRules = locale.getZoneRules(
Numbers.decodeLowInt(locale.matchZone(timezone, lo, hi)),
RESOLUTION_MICROS
);
offset = zoneRules.getOffset(timestampWithTimezone);
// getOffst really needs UTC date, not local
offset = zoneRules.getOffset(timestampWithTimezone - offset);
return timestampWithTimezone - offset;
}
offset = Numbers.decodeLowInt(l) * MINUTE_MICROS;
return timestampWithTimezone - offset;
}
/**
* Calculated start of year in millis. For example of year 2008 this is
* equivalent to parsing "2008-01-01T00:00:00.000Z", except this method is faster.
*
* @param year the year
* @param leap true if give year is leap year
* @return millis for start of year.
*/
public static long yearMicros(int year, boolean leap) {
int leapYears = year / 100;
if (year < 0) {
leapYears = ((year + 3) >> 2) - leapYears + ((leapYears + 3) >> 2) - 1;
} else {
leapYears = (year >> 2) - leapYears + (leapYears >> 2);
if (leap) {
leapYears--;
}
}
long days = year * 365L + (leapYears - DAYS_0000_TO_1970);
long micros = days * DAY_MICROS;
if (days < 0 & micros > 0) {
return Long.MIN_VALUE;
}
return micros;
}
private static boolean isDigit(char c) {
return c > BEFORE_ZERO && c < AFTER_NINE;
}
private static long getTimeMicros(long micros) {
return micros < 0 ? DAY_MICROS - 1 + (micros % DAY_MICROS) : micros % DAY_MICROS;
}
static {
STARTUP_TIMESTAMP = Os.currentTimeMicros();
long minSum = 0;
long maxSum = 0;
for (int i = 0; i < 11; i++) {
minSum += DAYS_PER_MONTH[i] * DAY_MICROS;
MIN_MONTH_OF_YEAR_MICROS[i + 1] = minSum;
maxSum += getDaysPerMonth(i + 1, true) * DAY_MICROS;
MAX_MONTH_OF_YEAR_MICROS[i + 1] = maxSum;
}
}
}