aureooms/js-integer-little-endian

/**
 * Function template for number stringification.
 * Endianess provided by the iterator function
 *
 * @param {int} f from radix
 * @param {int} t to radix
 * @param {function} iter iterator function
 * @param {function} zfill_t zero fill string function
 */


export function stringify_t (f, t, iter, zfill_t){

    if(t <= f){

        if(t > 36) throw new Error('t > 36 not implemented');

        var z = 0;
        while(f >= t){
            if(f % t) break;
            f /= t;
            ++z;
        }

        if(f !== 1) throw new Error('log(t) does not divide log(f) not implemented');

        var zfill = zfill_t(z);

        return function(a, i0, i1){
            var s = [];
            iter(i0, i1, function(i){
                s.push(zfill(Number(+a[i]).toString(t)));
            });
            return s.join('');
        };

    }
    else throw new Error('t > f not implemented');

}