export declare const NUM_DISTANCE_HISTOGRAM_SYMBOLS = 544;
export interface HistogramLiteral {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}
export interface HistogramCommand {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}
export interface HistogramDistance {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}
export declare function createHistogramLiteral(): HistogramLiteral;
export declare function createHistogramCommand(): HistogramCommand;
export declare function createHistogramDistance(): HistogramDistance;
export declare function histogramClear<T extends {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}>(histogram: T): void;
export declare function clearHistograms<T extends {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}>(histograms: T[]): void;
export declare function histogramAdd<T extends {
    data: Uint32Array;
    totalCount: number;
}>(histogram: T, symbol: number): void;
export declare function histogramAddVector<T extends {
    data: Uint32Array;
    totalCount: number;
}>(histogram: T, symbols: Uint8Array | Uint16Array, start: number, count: number): void;
export declare function histogramAddHistogram<T extends {
    data: Uint32Array;
    totalCount: number;
}>(dest: T, src: T): void;
export declare function histogramNumNonZero<T extends {
    data: Uint32Array;
}>(histogram: T): number;
export declare function buildLiteralHistogram(data: Uint8Array, start: number, length: number): HistogramLiteral;
export declare function buildHistogram(symbols: Uint8Array | Uint16Array | Uint32Array, start: number, length: number, alphabetSize: number): Uint32Array;
import { BlockSplit } from './block-splitter';
export type { BlockSplit };
/**
 * Iterator for walking through block splits
 */
export declare class BlockSplitIterator {
    private split;
    private idx;
    type: number;
    private length;
    constructor(split: BlockSplit);
    next(): void;
}
export declare function createEmptyBlockSplit(): BlockSplit;
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