/** Return `true` if `n` is an integer power of two (i.e. 1, 2, 4, 8, …).
 *
 *  Returns `false` for `n <= 0`.
 */
export declare function isPowerOfTwo(n: number): boolean;
/** Round `value` up to the nearest multiple of `multiple`.
 *
 *  `nextMultipleOf(7, 4)` → `8`. When `multiple <= 0` the result is `value`.
 */
export declare function nextMultipleOf(value: number, multiple: number): number;
/** Round `n` up to the next power of two.
 *
 *  Uses integer bit-twiddling for stability on large values. Returns `1` for
 *  `n <= 1`.
 */
export declare function nextPowerOfTwo(n: number): number;
/** Round `n` down to the largest power of two that is `<= n`.
 *
 *  `previousPowerOfTwo(6)` → `4`. Returns `1` for `n <= 1`.
 */
export declare function previousPowerOfTwo(n: number): number;
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