export default (read4: (buf: string[]) => number) =>
(buf: string[], n: number): number => {
    const tmp: string[] = Array<string>(4).fill("");

    let total = 0;

    let eof = false;

    while (!eof && total < n) {
        let count = read4(tmp);

        eof = count < 4;
        count = Math.min(count, n - total);

        for (let i = 0; i < count; i++) {
            buf[total++] = tmp[i];
        }
    }
    return total;
};