function zip(data, opts, cb) {
    if (!cb)
        cb = opts, opts = {};
    if (typeof cb != 'function')
        err(7);
    var r = {};
    fltn(data, '', r, opts);
    var k = Object.keys(r);
    var lft = k.length, o = 0, tot = 0;
    var slft = lft, files = new Array(lft);
    var term = [];
    var tAll = function () {
        for (var i = 0; i < term.length; ++i)
            term[i]();
    };
    var cbd = function (a, b) {
        mt(function () { cb(a, b); });
    };
    mt(function () { cbd = cb; });
    var cbf = function () {
        var out = new u8(tot + 22), oe = o, cdl = tot - o;
        tot = 0;
        for (var i = 0; i < slft; ++i) {
            var f = files[i];
            try {
                var l = f.c.length;
                wzh(out, tot, f, f.f, f.u, l);
                var badd = 30 + f.f.length + exfl(f.extra);
                var loc = tot + badd;
                out.set(f.c, loc);
                wzh(out, o, f, f.f, f.u, l, tot, f.m), o += 16 + badd + (f.m ? f.m.length : 0), tot = loc + l;
            }
            catch (e) {
                return cbd(e, null);
            }
        }
        wzf(out, o, files.length, cdl, oe);
        cbd(null, out);
    };
    if (!lft)
        cbf();
    var _loop_1 = function (i) {
        var fn = k[i];
        var _a = r[fn], file = _a[0], p = _a[1];
        var c = crc(), size = file.length;
        c.p(file);
        var f = strToU8(fn), s = f.length;
        var com = p.comment, m = com && strToU8(com), ms = m && m.length;
        var exl = exfl(p.extra);
        var compression = p.level == 0 ? 0 : 8;
        var cbl = function (e, d) {
            if (e) {
                tAll();
                cbd(e, null);
            }
            else {
                var l = d.length;
                files[i] = mrg(p, {
                    size: size,
                    crc: c.d(),
                    c: d,
                    f: f,
                    m: m,
                    u: s != fn.length || (m && (com.length != ms)),
                    compression: compression
                });
                o += 30 + s + exl + l;
                tot += 76 + 2 * (s + exl) + (ms || 0) + l;
                if (!--lft)
                    cbf();
            }
        };
        if (s > 65535)
            cbl(err(11, 0, 1), null);
        if (!compression)
            cbl(null, file);
        else if (size < 160000) {
            try {
                cbl(null, deflateSync(file, p));
            }
            catch (e) {
                cbl(e, null);
            }
        }
        else
            term.push(deflate(file, p, cbl));
    };
    // Cannot use lft because it can decrease
    for (var i = 0; i < slft; ++i) {
        _loop_1(i);
    }
    return tAll;
}
A method to terminate any internal workers used by the stream. Subsequent
calls to add() will fail.