export interface PatternSearchTarget {
    indexOfPattern(pattern: Uint8Array, startIndex: number): number;
}
/**
 * Stateful helper for incremental pattern scanning in growing buffers.
 *
 * The scanner tracks a `searchFrom` cursor and an `overlap` region so callers
 * can avoid rescanning bytes that cannot start a match.
 */
export declare class PatternScanner {
    readonly pattern: Uint8Array;
    readonly overlap: number;
    searchFrom: number;
    constructor(pattern: Uint8Array);
    /** Find the next match index starting at the current `searchFrom`. */
    find(target: PatternSearchTarget): number;
    /** Update `searchFrom` after consuming `consumed` bytes from the front. */
    onConsume(consumed: number): void;
    /** Update `searchFrom` after a no-match scan on a buffer of length `bufferLength`. */
    onNoMatch(bufferLength: number): void;
}