/**
 * Excel 97-2003 Binary (.xls) Parser — BIFF8 Format
 *
 * Pure TypeScript implementation that reads .xls files by:
 * 1. Using the OLE2 reader to extract the "Workbook" stream
 * 2. Parsing BIFF8 records (4-byte header: type + length, followed by data)
 * 3. Building a Shared String Table (SST) for text lookups
 * 4. Extracting sheet names, rows, and cell values
 * 5. Returning a valid OfficeParserAST
 *
 * Ported from the algorithms in:
 * - ref/poi/poi/src/main/java/org/apache/poi/hssf/ (Apache 2.0, Java HSSF)
 *   Specifically: HSSFWorkbook.java, RecordFactory.java, SSTRecord.java,
 *   BoundSheetRecord.java, LabelSSTRecord.java, NumberRecord.java
 *
 * @module xls
 */
/// <reference types="node" />
import { OfficeParserAST, OfficeParserConfig } from '../../types';
/**
 * Parse an Excel 97-2003 (.xls) file and return an OfficeParserAST.
 *
 * @param fileBuffer - Buffer containing the .xls file
 * @param config - OfficeParser configuration
 * @returns Parsed AST with sheets, rows, and cells
 */
export declare function parseXls(fileBuffer: Buffer, config: Required<OfficeParserConfig>): Promise<OfficeParserAST>;