export declare function countItems<T>(arr: T[]): {
    item: T;
    count: number;
}[];
export declare function countConsecutiveItems<T>(arr: T[]): {
    item: T;
    count: number;
}[];
declare abstract class BufferCursor {
    buffer: Uint8Array;
    pointer: number;
    constructor(bufOrLength: Uint8Array | number);
    /**
     * 安全地将 pointer 向前移动指定字节数。
     * @param bytes 要移动的字节数
     * @returns 原来 pointer 的值
     * @throws RangeError 如果越界
     */
    protected increasePointer(bytes: number): number;
}
export declare class BufferWriter extends BufferCursor {
    constructor(length: number);
    writeUint32LE(value: number): this;
    writeUint32BE(value: number): this;
    writeUint16LE(value: number): this;
    writeUint16BE(value: number): this;
    writeUint8(value: number): this;
    writeString(str: string): this;
}
export declare class BufferReader extends BufferCursor {
    constructor(buf: Uint8Array);
    readUint32LE(): number;
    readUint32BE(): number;
    readUint16LE(): number;
    readUint16BE(): number;
    readUint8(): number;
    readString(length: number): string;
    readRemaining(): Uint8Array;
}
export declare const arrayEquals: <T>(a: T[], b: T[]) => boolean;
export {};