/**
 * CRC32 calculation core (shared between Node.js and browser).
 *
 * Implements CRC-32 IEEE 802.3 using the reversed polynomial 0xEDB88320.
 *
 * Notes:
 * - Uses a lazily-initialized 256-entry lookup table.
 * - Exposes an incremental update API for streaming use cases.
 */
/**
 * Update a CRC32 value with a new data chunk.
 *
 * The CRC state here is the non-finalized (inverted) form:
 * - initial state: 0xffffffff
 * - finalize: xor with 0xffffffff
 */
export declare function crc32UpdateJS(crc: number, data: Uint8Array): number;
/**
 * Finalize CRC32 calculation.
 */
export declare function crc32Finalize(crc: number): number;
/**
 * Compute CRC32 for the full input using the JS table implementation.
 */
export declare function crc32JS(data: Uint8Array): number;
/**
 * Single-byte CRC32 update for ZipCrypto key derivation.
 * This uses the non-inverted form (raw table lookup).
 *
 * @param crc - Current CRC value (non-inverted)
 * @param byte - Single byte to process
 * @returns Updated CRC value
 */
export declare function crc32UpdateByte(crc: number, byte: number): number;