import { VSBuffer } from "./buffer.js";
type NotSyncHashable = ArrayBufferLike | ArrayBufferView;
/**
 * Return a hash value for an object.
 *
 * Note that this should not be used for binary data types. Instead,
 * prefer {@link hashAsync}.
 */
export declare function hash<T>(obj: T extends NotSyncHashable ? never : T): number;
export declare function doHash(obj: unknown, hashVal: number): number;
export declare function numberHash(val: number, initialHashVal: number): number;
export declare function stringHash(s: string, hashVal: number): number;
/** Hashes the input as SHA-1, returning a hex-encoded string. */
export declare const hashAsync: (input: string | ArrayBufferView | VSBuffer) => Promise<string>;
/**
 * A SHA1 implementation that works with strings and does not allocate.
 *
 * Prefer to use {@link hashAsync} in async contexts
 */
export declare class StringSHA1 {
    private static _bigBlock32;
    private _h0;
    private _h1;
    private _h2;
    private _h3;
    private _h4;
    private readonly _buff;
    private readonly _buffDV;
    private _buffLen;
    private _totalLen;
    private _leftoverHighSurrogate;
    private _finished;
    constructor();
    update(str: string): void;
    private _push;
    digest(): string;
    private _wrapUp;
    private _step;
}
export {};