static ConcatenatedStream ConcatenateStream(Stream l, Stream r)
{
var cstream = new ConcatenatedStream();
cstream.pending_streams.Enqueue(l);
cstream.pending_streams.Enqueue(r);
cstream.length = l.Length + r.Length;
return(cstream);
}
public static ConcatenatedStream operator +(ConcatenatedStream cs, IEnumerable <Stream> xs)
{
var cstream = new ConcatenatedStream();
cstream.pending_streams.Enqueue(cs);
cstream.length += cs.length;
foreach (var x in xs)
{
cstream.pending_streams.Enqueue(x);
cstream.length += x.Length;
}
return(cstream);
}
public ZipFile(IEnumerable <ZipEntry> entries)
{
this.entries = entries;
var offset = 0L;
foreach (var entry in entries)
{
offsets.Add(offset, entry);
offset += entry.Length;
}
var main_entries = new ConcatenatedStream(from entry in entries select(Stream) entry);
var central_directory = new List <Stream>();
foreach (var entry in offsets)
{
FileHeaders
_offset = (little_endian)(int)entry.Key,
total_records = (little_endian)entries.Count(),
made_by = (little_endian)(ushort)19,
version_needed = ZipEntry.VERSION_NEEDED,
general = ZipEntry.GENERAL,
method = ZipEntry.COMPRESSION_METHOD,
last_mod_time = entry.Value.last_mod_time,
last_mod_date = entry.Value.last_mod_date,
crc32 = entry.Value.crc32,
compressed_size = entry.Value.compressed_size,
uncompressed_size = entry.Value.uncompressed_size,
file_name_length = entry.Value.file_name_length,
file_name_bytes = new MemoryStream(entry.Value.file_name_bytes),
file_comment_length = (little_endian)(ushort)0,
disk_where_file_starts = (little_endian)(short)0,
internal_file_attributes = (little_endian)(short)0,
external_file_attributes = (little_endian)(int)0,
extra_field_length = ZipEntry.EXTRA_FIELD_LENGTH,
zip64_id = entry.Value.zip64_id,
zip64_len = entry.Value.zip64_len,
zip64_compressed = entry.Value.zip64_compressed,
zip64_uncompressed = entry.Value.zip64_uncompressed;
ConcatenatedStream directory_entry =
new[]
{
CENTRAL_DIRECTORY_FILE_HEADER_SIGNATURE,
made_by,
version_needed,
general,
method,
last_mod_time,
last_mod_date,
crc32,
compressed_size,
uncompressed_size,
file_name_length,
extra_field_length,
file_comment_length,
disk_where_file_starts,
internal_file_attributes,
external_file_attributes,
_offset,
file_name_bytes,
zip64_id,
zip64_len,
zip64_compressed,
zip64_uncompressed
};
central_directory.Add(directory_entry);
}
FileHeaders //ZIP64 END OF CENTRAL DIRECTORY
zip_64_end_of_central_directory_signature = ZIP64_END_OF_CENTRAL_DIRECTORY_SIGNATURE,
size_of_zip64_end_of_central_directory_record = (little_endian)(ulong)44,
version_made_by = VERSION_MADE_BY,
version_needed_to_extract = VERSION_NEEDED_TO_EXTRACT,
number_of_this_disk_64 = (little_endian)(uint)0,
number_of_the_disk_with_the_start_of_the_central_directory = (little_endian)(uint)0,
total_number_of_entries_in_the_central_directory_on_this_disk = (little_endian)(ulong)offsets.Count,
total_number_of_entries_in_the_central_director = (little_endian)(ulong)offsets.Count,
size_of_the_central_directory = (little_endian)(ulong)central_directory.Sum(x => x.Length),
offset_of_start_of_central_directory_with_respect_to_the_starting_disk_number = (little_endian)(ulong)main_entries.Length;
ConcatenatedStream
zip64_end_of_central_directory =
new[]
{
zip_64_end_of_central_directory_signature,
size_of_zip64_end_of_central_directory_record,
version_made_by,
version_needed_to_extract,
number_of_this_disk_64,
number_of_the_disk_with_the_start_of_the_central_directory,
total_number_of_entries_in_the_central_director,
total_number_of_entries_in_the_central_directory_on_this_disk,
size_of_zip64_end_of_central_directory_record,
offset_of_start_of_central_directory_with_respect_to_the_starting_disk_number
};
FileHeaders
zip64_end_of_central_dir_locator_signature = ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR_SIGNATURE,
number_of_the_disk_with_the_start_of_the_zip64_end_of_central_directory = (little_endian)(uint)0,
relative_offset_of_the_zip64_end_of_central_directory_record
= (little_endian)(ulong)((ulong)main_entries.Length + (ulong)(central_directory.Sum(x => x.Length))),
total_number_of_disks = (little_endian)(uint)1;
ConcatenatedStream
zip64_end_of_central_directory_locator =
new[]
{
zip64_end_of_central_dir_locator_signature,
number_of_the_disk_with_the_start_of_the_zip64_end_of_central_directory,
relative_offset_of_the_zip64_end_of_central_directory_record,
total_number_of_disks
};
FileHeaders
central_directory_length = (little_endian)(int)central_directory.Sum(x => x.Length),
number_of_this_disk = (little_endian)(ushort)0,
disk_where_central_directory_starts = (little_endian)(ushort)0,
number_of_central_directory_records_on_this_disk = (little_endian)(ushort)central_directory.Count,
total_number_of_records = (little_endian)(ushort)central_directory.Count,
offset_start_of_central_directory = (little_endian)(int)main_entries.Length,
comment_length = (little_endian)(ushort)0;
ConcatenatedStream end_of_directory =
new[]
{
END_OF_CENTRAL_DIRECTORY_SIGNATURE,
number_of_this_disk,
disk_where_central_directory_starts,
number_of_central_directory_records_on_this_disk,
total_number_of_records,
central_directory_length,
offset_start_of_central_directory,
comment_length,
};
stream = main_entries + central_directory + zip64_end_of_central_directory + zip64_end_of_central_directory_locator + end_of_directory;
}