/// <reference types="node" />
/**
 * Default value if value is undefined.
 *
 * @param value Value.
 * @param defaultValue Default value.
 * @returns Value or the default value if undefined.
 */
export declare function defaultValue<T, U>(value: T, defaultValue: U): Exclude<T, undefined> | U;
/**
 * Default null if value is undefined.
 *
 * @param value Value.
 * @returns Value or null if undefined.
 */
export declare function defaultNull<T>(value: T): Exclude<T, undefined> | null;
/**
 * Default false if value is undefined.
 *
 * @param value Value.
 * @returns Value or false if undefined.
 */
export declare function defaultFalse<T>(value: T): false | Exclude<T, undefined>;
/**
 * Default true if value is undefined.
 *
 * @param value Value.
 * @returns Value or true if undefined.
 */
export declare function defaultTrue<T>(value: T): true | Exclude<T, undefined>;
/**
 * Trim dot flash from head of path.
 *
 * @param path Path string.
 * @returns Trimmed path.
 */
export declare function trimDotSlash(path: string): string;
/**
 * Find path relative from base, if base matches.
 *
 * @param path Path to match against.
 * @param start Search start.
 * @param nocase Match case-insensitive.
 * @returns Returns path, or null.
 */
export declare function pathRelativeBase(path: string, start: string, nocase?: boolean): string | null;
/**
 * Same as pathRelativeBase, but retuns true on a match, else false.
 *
 * @param path Path to match against.
 * @param start Search start.
 * @param nocase Match case-insensitive.
 * @returns Returns true on match, else false.
 */
export declare function pathRelativeBaseMatch(path: string, start: string, nocase?: boolean): boolean;
/**
 * Get ArrayBuffer from Buffer.
 *
 * @param buffer Buffer instance.
 * @returns ArrayBuffer copy.
 */
export declare function bufferToArrayBuffer(buffer: Readonly<Buffer>): ArrayBuffer;