/**
 * Range Calculator Module
 * Handles HTTP Range header parsing and chunk offset calculations
 */
import type { ParsedRange, ChunkWithOffsets, ChunkManifest } from './types.js';
/**
 * Parses an HTTP Range header
 * @param rangeHeader - Range header value (e.g., "bytes=0-1023")
 * @param totalSize - Total size of the file
 * @returns Parsed range with start, end, and length
 */
export declare function parseRangeHeader(rangeHeader: string, totalSize: number): ParsedRange | null;
/**
 * Determines which chunks are needed for a given byte range
 * @param manifest - Chunk manifest for the file
 * @param start - Start byte position
 * @param end - End byte position
 * @returns Array of chunks with calculated slice offsets
 */
export declare function getChunksForRange(manifest: ChunkManifest, start: number, end: number): ChunkWithOffsets[];
/**
 * Calculates total bytes that will be extracted from chunks
 * Useful for validating range responses
 */
export declare function calculateExtractedSize(chunks: ChunkWithOffsets[]): number;
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