public static void Main(string[] args)
{
bool showHelp = false;
bool extractUnknowns = true;
bool overwriteFiles = false;
bool verbose = false;
var options = new OptionSet
{
{
"o|overwrite",
"overwrite existing files",
v => overwriteFiles = v != null
},
{
"nu|no-unknowns",
"don't extract unknown files",
v => extractUnknowns = v == null
},
{
"v|verbose",
"be verbose",
v => verbose = v != null
},
{
"h|help",
"show this message and exit",
v => showHelp = v != null
},
};
List <string> extras;
try
{
extras = options.Parse(args);
}
catch (OptionException e)
{
Console.Write("{0}: ", GetExecutableName());
Console.WriteLine(e.Message);
Console.WriteLine("Try `{0} --help' for more information.", GetExecutableName());
return;
}
if (extras.Count < 1 || extras.Count > 2 || showHelp)
{
Console.WriteLine("Usage: {0} [OPTIONS]+ input_sfar [output_dir]", GetExecutableName());
Console.WriteLine();
Console.WriteLine("Options:");
options.WriteOptionDescriptions(Console.Out);
return;
}
string inputPath = extras[0];
string outputPath = extras.Count > 1 ? extras[1] : Path.ChangeExtension(inputPath, null);
Manager manager = Manager.Load();
if (manager.ActiveProject == null)
{
Console.WriteLine("Warning: no active project loaded.");
}
HashList <FileNameHash> hashes = manager.LoadLists(
"*.filelist",
FileNameHash.Compute,
s => s.Replace("\\", "/"));
using (FileStream input = File.OpenRead(inputPath))
{
var sfx = new SFXArchiveFile();
sfx.Deserialize(input);
long current = 0;
long total = sfx.Entries.Count;
int padding = total.ToString(CultureInfo.InvariantCulture).Length;
if (sfx.CompressionScheme != CompressionScheme.None &&
sfx.CompressionScheme != CompressionScheme.Lzma &&
sfx.CompressionScheme != CompressionScheme.Lzx)
{
Console.WriteLine("Unsupported compression scheme!");
return;
}
var inputBlock = new byte[sfx.MaximumBlockSize];
var outputBlock = new byte[sfx.MaximumBlockSize];
var hashesFromFile = new Dictionary <FileNameHash, string>();
// todo: figure out what the file name is
var fileNameListNameHash = new FileNameHash(
new byte[]
{
0xB5, 0x50, 0x19, 0xCB, 0xF9, 0xD3, 0xDA, 0x65, 0xD5, 0x5B, 0x32, 0x1C, 0x00, 0x19, 0x69, 0x7C,
});
Entry fileNameListEntry = sfx.Entries
.FirstOrDefault(e =>
e.NameHash == fileNameListNameHash);
if (fileNameListEntry != null)
{
using (var temp = new MemoryStream())
{
DecompressEntry(
sfx, fileNameListEntry,
input, inputBlock,
temp, outputBlock);
temp.Position = 0;
var reader = new StreamReader(temp);
while (reader.EndOfStream == false)
{
string line = reader.ReadLine();
hashesFromFile.Add(FileNameHash.Compute(line), line);
}
}
}
foreach (var entry in sfx.Entries)
{
current++;
string entryName = hashes[entry.NameHash];
if (entryName == null)
{
if (hashesFromFile.ContainsKey(entry.NameHash))
{
entryName = hashesFromFile[entry.NameHash];
}
}
if (entryName == null)
{
if (extractUnknowns == false)
{
continue;
}
entryName = entry.NameHash.ToString();
entryName = Path.Combine("__UNKNOWN", entryName);
}
else
{
entryName = entryName.Replace("/", "\\");
if (entryName.StartsWith("\\"))
{
entryName = entryName.Substring(1);
}
}
string entryPath = Path.Combine(outputPath, entryName);
if (overwriteFiles == false &&
File.Exists(entryPath))
{
continue;
}
if (verbose)
{
Console.WriteLine("[{0}/{1}] {2}",
current.ToString(CultureInfo.InvariantCulture).PadLeft(padding), total, entryName);
}
input.Seek(entry.Offset, SeekOrigin.Begin);
Directory.CreateDirectory(Path.GetDirectoryName(entryPath));
using (FileStream output = File.Create(entryPath))
{
DecompressEntry(
sfx, entry,
input, inputBlock,
output, outputBlock);
}
}
}
}
private static void DecompressEntry(
SFXArchiveFile sfx,
Entry entry,
Stream input,
byte[] inputBlock,
Stream output,
byte[] outputBlock)
{
long left = entry.UncompressedSize;
input.Seek(entry.Offset, SeekOrigin.Begin);
if (entry.BlockSizeIndex == -1)
{
output.WriteFromStream(input, entry.UncompressedSize);
}
else
{
int blockSizeIndex = entry.BlockSizeIndex;
while (left > 0)
{
uint compressedBlockSize = sfx.BlockSizes[blockSizeIndex];
if (compressedBlockSize == 0)
{
compressedBlockSize = sfx.MaximumBlockSize;
}
if (sfx.CompressionScheme == CompressionScheme.None)
{
output.WriteFromStream(input, compressedBlockSize);
left -= compressedBlockSize;
}
else if (sfx.CompressionScheme == CompressionScheme.Lzma)
{
if (compressedBlockSize == sfx.MaximumBlockSize ||
compressedBlockSize == left)
{
output.WriteFromStream(input, compressedBlockSize);
left -= compressedBlockSize;
}
else
{
var uncompressedBlockSize = (uint)Math.Min(
left, sfx.MaximumBlockSize);
if (compressedBlockSize < 5)
{
throw new InvalidOperationException();
}
byte[] properties = input.ReadBytes(5);
compressedBlockSize -= 5;
if (input.Read(inputBlock, 0, (int)compressedBlockSize)
!= compressedBlockSize)
{
throw new EndOfStreamException();
}
uint actualUncompressedBlockSize = uncompressedBlockSize;
uint actualCompressedBlockSize = compressedBlockSize;
LZMA.ErrorCode error = LZMA.Decompress(
outputBlock,
ref actualUncompressedBlockSize,
inputBlock,
ref actualCompressedBlockSize,
properties,
(uint)properties.Length);
if (error != LZMA.ErrorCode.Ok ||
uncompressedBlockSize != actualUncompressedBlockSize ||
compressedBlockSize != actualCompressedBlockSize)
{
throw new InvalidOperationException();
}
output.Write(outputBlock, 0, (int)actualUncompressedBlockSize);
left -= uncompressedBlockSize;
}
}
else
{
throw new NotImplementedException();
}
blockSizeIndex++;
}
}
}
