export declare function colIndexToLetter(n: number): string;
export declare function colLetterToIndex(col: string): number;
export declare function cellRefToIndices(ref: string): {
    row: number;
    col: number;
};
export declare function indicesToCellRef(row: number, col: number, abs?: boolean): string;
export declare function parseRange(range: string): {
    startRow: number;
    startCol: number;
    endRow: number;
    endCol: number;
};
export declare function escapeXml(s: string): string;
export declare function xmlAttrs(attrs: Record<string, string | number | boolean | undefined>): string;
export declare function xmlTag(tag: string, attrs: Record<string, any>, content?: string): string;
export declare function strToBytes(s: string): Uint8Array;
export declare function dateToSerial(d: Date, date1904?: boolean): number;
export declare function deepClone<T>(v: T): T;
export declare function uid(): string;
export declare function emuToPx(emu: number): number;
export declare function pxToEmu(px: number): number;
export declare function colWidthToEmu(w: number, charWidth?: number): number;
export declare function rowHeightToEmu(h: number): number;
export declare function base64ToBytes(b64: string): Uint8Array;
export declare function bytesToBase64(data: Uint8Array): string;
export declare function a1ToR1C1(ref: string, baseRow: number, baseCol: number): string;
export declare function r1c1ToA1(ref: string, baseRow: number, baseCol: number): string;
export declare function formulaToR1C1(formula: string, baseRow: number, baseCol: number): string;
export declare function formulaFromR1C1(formula: string, baseRow: number, baseCol: number): string;