export interface IKeyword {
    key: string;
    value: any;
    comment: string;
}
export declare type TypedArray = Uint8Array | Int8Array | Uint16Array | Int16Array | Uint32Array | Int32Array | Float32Array | Float64Array;
export interface IDataReader {
    name: string;
    canReadData(header: IKeyword[]): boolean;
    readDataAsync(file: IDataSource, offsetBytes: number, header: IKeyword[]): Promise<any>;
    readDataSize(header: IKeyword[]): number;
}
export interface IDataSource {
    initialize(): Promise<boolean>;
    getByteLength(): number;
    getStringAsync(start: number, length: number): Promise<string>;
    getDataAsync(start: number, length: number, bitPix: BitPix, changeEndian?: boolean): Promise<TypedArray>;
}
export interface IHdu {
    data: () => Promise<any | void>;
    header: IKeyword[];
    bytesRead: number;
}
export interface IHeaderResult {
    header: IKeyword[];
    bytesRead: number;
}
export interface IAsciiConverter {
    array: TypedArray | string[];
    converter: (x: string) => any;
}
export declare class DataResult {
    data: any;
    name: string;
    constructor(data: any, name: string);
}
/**
 *  Contains constants describing basic structure of FITS file. Each unit of organization,
 *  be it header of payload is padded to be a multiple of 2880, which defined to be a block length.
 *
 *  In header each line has constant length of 80 ASCII characters, with 8 bytes for the keyword,
 *  hence abbreviated key names.
 *
 *  Block length divided by line length gives the maximal count of lines per block: 36.
 */
export declare const Constants: {
    blockLength: number;
    lineLength: number;
    keyLength: number;
    maxKeywordsInBlock: number;
};
export declare enum BitPix {
    Uint8 = 8,
    Char = 8,
    Int16 = 16,
    Int32 = 32,
    Int64 = 64,
    Float32 = -32,
    Float64 = -64,
    Unknown = 0
}
export declare class BitPixUtils {
    /**
     *  Gets size of type in bytes
     *  @static
     *  @public
     *  @param {BitPix} type - The type.
     *  @return {number} - size in bytes
     */
    static getByteSize(type: BitPix): number;
    static getBitPixForLetter(format: string): BitPix.Uint8 | BitPix.Int16 | BitPix.Int32 | BitPix.Int64 | BitPix.Float32 | BitPix.Float64;
}