zip method

Uint8List zip(Map<String, dynamic> data, [ Map<String, dynamic>? opts ])

Implementation

Uint8List zip(Map<String,dynamic> data, [Map<String,dynamic>? opts]) {
  opts ??= {};
  final Map<String,dynamic> r = {};
  List files = [];
  fltn(data, '', r, opts);
  int o = 0;
  int tot = 0;
  for (final fn in r.keys) {
    var _a = r[fn], file = _a[0];
    Map<String,dynamic> p = _a[1];
    int compression = (p['level'] ?? 0) == 0 ? 0 : 8;
    u8 f = strToU8(fn);
    int s = f.length;
    var com = p['comment'] ?? 0;
    var m = (com != 0 && strToU8(com) != 0) ? strToU8(com) : com;//com && strToU8(com);
    int ms = (m != 0 && m.length != 0) ? m.length : m;//m && m.length;
    int exl = exfl(p['extra']);
    if (s > 65535){
      err(11);
    }
    var d = compression != 0? deflateSync(file, p) : file;
    int l = d.length;
    Map<String,Function> c = crc();
    c['p']?.call(file);
    files.add(mrg(p, {
      'size': file.length,
      'crc': c['d']?.call(),
      'c': d,
      'f': f,
      'm': m,
      'u': s != fn.length || (m != 0 && (com.length != ms)),
      'o': o,
      'compression': compression
    }));
    o += 30 + s + exl + l;
    tot += 76 + 2 * (s + exl) + ms + l;
  }
  Uint8List out = u8(tot + 22);
  int oe = o, cdl = tot - o;
  for (int i = 0; i < files.length; ++i) {
    Map f = files[i];
    wzh(out, f['o'], f, f['f'], f['u'], f['c'].length);
    int badd = 30 + (f['f'].length as int) + exfl(f['extra']);
    out.setAll(f['o'] + badd,f['c']);//out[f['c']] = f['o'] + badd;
    wzh(out, o, f, f['f'], f['u'], f['c'].length, f['o'],
    f['m']);
    o += 16 + badd + (f['m'] is int? (f['m'] as int):(f['m'].length) as int);//(f['m'] != null? f['m'].length : 0) as int;
  }
  wzf(out, o, files.length, cdl, oe);
  return out;
}