protected Stream UnpackEntry(Stream input, NsaEntry nsa_entry)
{
if (null == nsa_entry)
{
return(input);
}
if (nsa_entry.Name.HasExtension(".nbz"))
{
input.Position = 4;
return(new BZip2InputStream(input));
}
if (!(Compression.LZSS == nsa_entry.CompressionType ||
Compression.SPB == nsa_entry.CompressionType))
{
return(input);
}
using (input)
{
var decoder = new Unpacker(input, nsa_entry.UnpackedSize);
if (Compression.SPB == nsa_entry.CompressionType)
{
return(decoder.SpbDecodedStream());
}
else
{
return(decoder.LzssDecodedStream());
}
}
}
protected Stream UnpackEntry(Stream input, NsaEntry nsa_entry)
{
if (null == nsa_entry ||
!(Compression.LZSS == nsa_entry.CompressionType ||
Compression.SPB == nsa_entry.CompressionType))
{
return(input);
}
using (input)
{
var decoder = new Unpacker(input, nsa_entry.UnpackedSize);
if (Compression.SPB == nsa_entry.CompressionType)
{
return(decoder.SpbDecodedStream());
}
else
{
return(decoder.LzssDecodedStream());
}
}
}
public override void Create(Stream output, IEnumerable <Entry> list, ResourceOptions options,
EntryCallback callback)
{
var ons_options = GetOptions <NsaOptions> (options);
var encoding = Encodings.cp932.WithFatalFallback();
int callback_count = 0;
var real_entry_list = new List <NsaEntry>();
var used_names = new HashSet <string>();
int index_size = 0;
foreach (var entry in list)
{
if (!used_names.Add(entry.Name)) // duplicate name
{
continue;
}
try
{
index_size += encoding.GetByteCount(entry.Name) + 1;
}
catch (EncoderFallbackException X)
{
throw new InvalidFileName(entry.Name, arcStrings.MsgIllegalCharacters, X);
}
var header_entry = new NsaEntry {
Name = entry.Name
};
if (Compression.None != ons_options.CompressionType)
{
if (entry.Name.HasExtension(".bmp"))
{
header_entry.CompressionType = ons_options.CompressionType;
}
}
index_size += 13;
real_entry_list.Add(header_entry);
}
long start_offset = output.Position;
long base_offset = 6 + index_size;
output.Seek(base_offset, SeekOrigin.Current);
foreach (var entry in real_entry_list)
{
using (var input = File.OpenRead(entry.Name))
{
var file_size = input.Length;
if (file_size > uint.MaxValue)
{
throw new FileSizeException();
}
long file_offset = output.Position - base_offset;
if (file_offset + file_size > uint.MaxValue)
{
throw new FileSizeException();
}
if (null != callback)
{
callback(callback_count++, entry, arcStrings.MsgAddingFile);
}
entry.Offset = file_offset;
entry.UnpackedSize = (uint)file_size;
if (Compression.LZSS == entry.CompressionType)
{
var packer = new Packer(input, output);
entry.Size = packer.EncodeLZSS();
}
else
{
entry.Size = entry.UnpackedSize;
entry.CompressionType = Compression.None;
input.CopyTo(output);
}
}
}
if (null != callback)
{
callback(callback_count++, null, arcStrings.MsgWritingIndex);
}
output.Position = start_offset;
using (var writer = new BinaryWriter(output, encoding, true))
{
writer.Write(Binary.BigEndian((short)real_entry_list.Count));
writer.Write(Binary.BigEndian((uint)base_offset));
foreach (var entry in real_entry_list)
{
writer.Write(encoding.GetBytes(entry.Name));
writer.Write((byte)0);
writer.Write((byte)entry.CompressionType);
writer.Write(Binary.BigEndian((uint)entry.Offset));
writer.Write(Binary.BigEndian((uint)entry.Size));
writer.Write(Binary.BigEndian((uint)entry.UnpackedSize));
}
}
}
protected Stream UnpackEntry(Stream input, NsaEntry nsa_entry)
{
if (null == nsa_entry
|| !(Compression.LZSS == nsa_entry.CompressionType ||
Compression.SPB == nsa_entry.CompressionType))
return input;
using (input)
{
var decoder = new Unpacker (input, nsa_entry.UnpackedSize);
if (Compression.SPB == nsa_entry.CompressionType)
return decoder.SpbDecodedStream();
else
return decoder.LzssDecodedStream();
}
}
public override void Create(Stream output, IEnumerable<Entry> list, ResourceOptions options,
EntryCallback callback)
{
var ons_options = GetOptions<NsaOptions> (options);
var encoding = Encodings.cp932.WithFatalFallback();
int callback_count = 0;
var real_entry_list = new List<NsaEntry>();
var used_names = new HashSet<string>();
int index_size = 0;
foreach (var entry in list)
{
if (!used_names.Add (entry.Name)) // duplicate name
continue;
try
{
index_size += encoding.GetByteCount (entry.Name) + 1;
}
catch (EncoderFallbackException X)
{
throw new InvalidFileName (entry.Name, arcStrings.MsgIllegalCharacters, X);
}
var header_entry = new NsaEntry { Name = entry.Name };
if (Compression.None != ons_options.CompressionType)
{
if (entry.Name.EndsWith (".bmp", StringComparison.InvariantCultureIgnoreCase))
header_entry.CompressionType = ons_options.CompressionType;
}
index_size += 13;
real_entry_list.Add (header_entry);
}
long start_offset = output.Position;
long base_offset = 6+index_size;
output.Seek (base_offset, SeekOrigin.Current);
foreach (var entry in real_entry_list)
{
using (var input = File.OpenRead (entry.Name))
{
var file_size = input.Length;
if (file_size > uint.MaxValue)
throw new FileSizeException();
long file_offset = output.Position - base_offset;
if (file_offset+file_size > uint.MaxValue)
throw new FileSizeException();
if (null != callback)
callback (callback_count++, entry, arcStrings.MsgAddingFile);
entry.Offset = file_offset;
entry.UnpackedSize = (uint)file_size;
if (Compression.LZSS == entry.CompressionType)
{
var packer = new Packer (input, output);
entry.Size = packer.EncodeLZSS();
}
else
{
entry.Size = entry.UnpackedSize;
entry.CompressionType = Compression.None;
input.CopyTo (output);
}
}
}
if (null != callback)
callback (callback_count++, null, arcStrings.MsgWritingIndex);
output.Position = start_offset;
using (var writer = new BinaryWriter (output, encoding, true))
{
writer.Write (Binary.BigEndian ((short)real_entry_list.Count));
writer.Write (Binary.BigEndian ((uint)base_offset));
foreach (var entry in real_entry_list)
{
writer.Write (encoding.GetBytes (entry.Name));
writer.Write ((byte)0);
writer.Write ((byte)entry.CompressionType);
writer.Write (Binary.BigEndian ((uint)entry.Offset));
writer.Write (Binary.BigEndian ((uint)entry.Size));
writer.Write (Binary.BigEndian ((uint)entry.UnpackedSize));
}
}
}