import { CalendarDate } from './calendar';
import { TimePeriod } from './interval';
import { ZoneInfo } from './timezone';
export interface YearMonthDay {
    year: number;
    month: number;
    day: number;
}
export interface YearMonth {
    year: number;
    month: number;
}
/**
 * Extract year, month, and day fields.
 */
export declare const toYMD: (d: CalendarDate) => YearMonthDay;
/**
 * Given a Julian day and local milliseconds (in UTC), return the Unix
 * epoch milliseconds UTC.
 */
export declare const unixEpochFromJD: (jd: number, msDay: number) => number;
/**
 * Ensure n falls between min and max.
 */
export declare const clamp: (n: number, min: number, max: number) => number;
/**
 * Ensure that the year, month, and day represent a valid date, clamping the
 * month and day fields to a valid range.
 */
export declare const clampYMD: (year: number, monthArg: number, d: number) => YearMonthDay;
/**
 * Adjust the year and month to ensure they represent part of a valid date.
 */
export declare const adjustYM: (yearp: number, monthp: number) => YearMonth;
/**
 * Add time fields in milliseconds.
 */
export declare const adjustTime: (millis: number, added: TimePeriod) => [number, number];
export declare const timeToMillis: (period: Partial<TimePeriod>) => number;
/**
 * Keep the integral part of each field and replace undefined with zero.
 */
export declare const truncateFields: (fields: Partial<TimePeriod>) => TimePeriod;
/**
 * Compute Julian day from timezone-adjusted Unix epoch milliseconds.
 */
export declare const fieldsFromUnixEpoch: (ms: number, f: number[]) => void;
/**
 * Compute the Julian day and the milliseconds remainder from a Unix epoch timestamp.
 */
export declare const jdFromUnixEpoch: (ms: number) => [number, number];
/**
 * Initialize base calendar fields.
 */
export declare const initBaseFromUnixEpoch: (f: number[], ms: number, zoneId: string) => ZoneInfo;
/**
 * Compute fields common to all calendars. Before calling this, we must
 * have the JULIAN_DAY and MILLIS_IN_DAY fields set. Every calculation
 * is relative to these.
 */
export declare const computeBaseFields: (f: number[]) => void;