/**
 * Sequence execution: copy literals + match copies with window.
 */
export interface Sequence {
    literalsLength: number;
    offset: number;
    matchLength: number;
}
export interface PackedSequences {
    literalsLength: Uint32Array;
    offset: Uint32Array;
    matchLength: Uint32Array;
    length: number;
}
export interface HistoryWindow {
    buffer: Uint8Array;
    length: number;
    writePos: number;
}
export declare function createHistoryWindow(windowSize: number, initial?: Uint8Array): HistoryWindow;
/** Internal: reuse bag for decoder context. */
export interface DecoderReuseBag {
    _history?: HistoryWindow;
    _sequences?: PackedSequences;
}
export declare function ensurePackedSequencesCapacity(existing: PackedSequences | undefined, minLength: number): PackedSequences;
export declare function packSequences(sequences: readonly Sequence[], reuse?: PackedSequences): PackedSequences;
export declare function packedSequencesToArray(sequences: PackedSequences): Sequence[];
/**
 * Get or create a history window, reusing from bag when buffer is large enough.
 * Caller may pass a mutable bag; it will be updated with the history used.
 */
export declare function getOrCreateHistoryWindow(windowSize: number, initial: Uint8Array | undefined, reuse: DecoderReuseBag | undefined): HistoryWindow;
export declare function appendToHistoryWindow(history: HistoryWindow, chunk: Uint8Array): void;
export declare function appendRangeToHistoryWindow(history: HistoryWindow, source: Uint8Array, start: number, length: number): void;
export declare function appendRLEToHistoryWindow(history: HistoryWindow, byte: number, length: number): void;
export declare function executeSequencesInto(literals: Uint8Array, sequences: PackedSequences, windowSize: number, target: Uint8Array, targetOffset: number, repOffsets?: [number, number, number], historyInput?: HistoryWindow | Uint8Array, updateHistory?: boolean): number;
export declare function executeSequencesIntoFast(literals: Uint8Array, sequences: PackedSequences, windowSize: number, target: Uint8Array, targetOffset: number, repOffsets?: [number, number, number], historyInput?: HistoryWindow | Uint8Array, updateHistory?: boolean): number;
/**
 * Execute sequences to produce decompressed output.
 * repOffsets: [Repeated_Offset1, Repeated_Offset2, Repeated_Offset3], updated in place.
 */
export declare function executeSequences(literals: Uint8Array, sequences: Sequence[], windowSize: number, repOffsets?: [number, number, number], historyInput?: HistoryWindow | Uint8Array): Uint8Array;