import { eCompress } from "big-float-ts";


const maxSafe = BigInt(2**53);
/**
 * Returns the [Shewchuk](https://people.eecs.berkeley.edu/~jrs/papers/robustr.pdf) expansion of the given bigint.
 * 
 * * it is assumed that the given bigint doesn't cause floating point overflow
 * 
 * @internal
 */
function bigintToExpansion(b: bigint): number[] {
    if (b === 0n) { return [0]; }
    const e: number[] = [];
    let i = 0;
    let q = b;
    while (q !== 0n) {
        q = b / maxSafe;
        const r = b % maxSafe;
        e.push(Number(r)*2**(i*53));
        b = q;
        i++;
    }

    return eCompress(e);
}


export { bigintToExpansion }