/**
 * less's ltget_env: debug marker, terminfo-name override, then the
 * two-character termcap override. TERMCAP supplies our database fallback.
 */
export declare function terminalCapability(terminfo: string | null, termcap: string | null): string | undefined;
/**
 * Whether the terminal database described this terminal.
 *
 * less always has an answer here: it links curses, so a capability the
 * entry omits is genuinely ABSENT and less uses the empty string. We
 * read the compiled entries ourselves, so a miss can also mean we
 * found no database to read - and there the hardcoded ANSI guesses
 * are the better answer. This tells the two apart.
 */
export declare function terminfoAnswered(): boolean;
/** Forgets the loaded entry, so a fresh session re-reads $TERM. */
export declare function resetTerminfo(): void;
export declare function terminalNumber(terminfo: string | null, termcap: string | null): number | undefined;
export declare function terminalFlag(terminfo: string | null, termcap: string | null): boolean | undefined;
/** Small tparm/tgoto subset covering less's row/column capabilities. */
export declare function formatTerminalCapability(capability: string, first: number, second: number): string;