aureooms/js-integer-little-endian

/**
 * Wrapper for binary operator.
 * Ensures
 *
 *     i >= j
 *     i0, j0, k0 >= 0
 *
 */

export function wrapbin (fn){

    return function(a, i0, i1, b, j0, j1, c, k0, k1){

        var i, j, k;

        k0 = Math.max(0, k0);
        k = k1 - k0;

        i0 = Math.max(0, i0, i1 - k);
        j0 = Math.max(0, j0, j1 - k);
        i = i1 - i0;
        j = j1 - j0;

        if(i < j)
        return fn(b, j0, j1, a, i0, i1, c, k0, k1);

        else
        return fn(a, i0, i1, b, j0, j1, c, k0, k1);
    };
}