/**
 * Determine if a URL path segment is safe to use as a filesystem path component, preventing us
 * from treating a path segment as a potential directory traversal attack.
 *
 */
export declare function isSafePathSegment(segment: unknown): boolean;
/**
 * Decode the last path segment of a URI and validate it as a safe path component.
 *
 */
export declare function decodeURILastSegment(uri: string): string | null;
/**
 * Resolve the segments of a supplied path within a root directory and only return the path if it
 * is contained within the supplied root.
 *
 */
export declare function resolvePathWithinRoot(root: string, ...segments: string[]): string | null;