datezone/dist/types/offset.internal.d.ts

A lightweight and comprehensive date and timeZone utility library for JavaScript.

import { type TimeZone } from "./timezone.pub.js";
type OffsetCacheEntry = {
    hourStart: number;
    offset: number;
};
type OffsetPeriod = {
    start: number;
    end: number;
    offset: number;
};
export declare const offsetCache: {
    checkedLocalDST: boolean;
    fixedOffset: Map<TimeZone | null, number>;
    hotCache: Map<string, {
        offset: number;
        validUntil: number;
    }>;
    lastLocalHourStart: number | null;
    lastLocalOffset: number | null;
    localFixedOffset: number | null;
    perHourOffset: Map<TimeZone | null, OffsetCacheEntry>;
};
/**
 * High-performance LRU cache with O(1) operations
 */
declare class FastLRUOffsetPeriodCache {
    private cache;
    private head;
    private tail;
    private size;
    constructor();
    private addToHead;
    private removeNode;
    private moveToHead;
    private popTail;
    get(tz: TimeZone): OffsetPeriod[] | undefined;
    set(tz: TimeZone, periods: OffsetPeriod[]): void;
    has(tz: TimeZone): boolean;
    delete(tz: TimeZone): void;
}
export declare const timeZoneOffsetPeriods: FastLRUOffsetPeriodCache;
export declare const DST_WINDOW_MS: number;
export declare function getYearStartEnd(year: number): [number, number];
export declare function computeOffsetPeriods(tz: TimeZone, year: number): OffsetPeriod[];
export declare function ensureOffsetPeriods(tz: TimeZone, year: number): void;
export declare function getCachedOffsetDST(ts: number, tz: TimeZone): number | null;
export declare function calcOffset(ts: number, tz: TimeZone | null, bypassCache?: boolean): number;
export {};
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