public static void Main(string[] args)
{
bool showHelp = false;
bool extractUnknowns = true;
bool onlyUnknowns = false;
bool extractFiles = true;
string filterPattern = null;
bool overwriteFiles = false;
bool verbose = false;
var options = new OptionSet()
{
{ "o|overwrite", "overwrite existing files", v => overwriteFiles = v != null },
{ "nf|no-files", "don't extract files", v => extractFiles = v == null },
{ "nu|no-unknowns", "don't extract unknown files", v => extractUnknowns = v == null },
{ "ou|only-unknowns", "only extract unknown files", v => onlyUnknowns = v != null },
{ "f|filter=", "only extract files using pattern", v => filterPattern = v },
{ "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 == true)
{
Console.WriteLine("Usage: {0} [OPTIONS]+ input_fat [output_dir]", GetExecutableName());
Console.WriteLine();
Console.WriteLine("Unpack files from a Big File (FAT/DAT pair).");
Console.WriteLine();
Console.WriteLine("Options:");
options.WriteOptionDescriptions(Console.Out);
return;
}
string fatPath = extras[0];
string outputPath = extras.Count > 1 ? extras[1] : Path.ChangeExtension(fatPath, null) + "_unpack";
string datPath;
Regex filter = null;
if (string.IsNullOrEmpty(filterPattern) == false)
{
filter = new Regex(filterPattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
}
if (Path.GetExtension(fatPath) == ".dat")
{
datPath = fatPath;
fatPath = Path.ChangeExtension(fatPath, ".fat");
}
else
{
datPath = Path.ChangeExtension(fatPath, ".dat");
}
if (verbose == true)
{
Console.WriteLine("Loading project...");
}
var manager = ProjectData.Manager.Load();
if (manager.ActiveProject == null)
{
Console.WriteLine("Warning: no active project loaded.");
}
if (verbose == true)
{
Console.WriteLine("Reading FAT...");
}
BigFile fat;
using (var input = File.OpenRead(fatPath))
{
fat = new BigFile();
fat.Deserialize(input);
}
var hashes = manager.LoadListsFileNames(fat.Version);
using (var input = File.OpenRead(datPath))
{
if (extractFiles == true)
{
Big.Entry[] entries = fat.Entries.OrderBy(e => e.Offset).ToArray();
if (entries.Length > 0)
{
if (verbose == true)
{
Console.WriteLine("Unpacking files...");
}
long current = 0;
long total = entries.Length;
var padding = total.ToString(CultureInfo.InvariantCulture).Length;
var duplicates = new Dictionary <ulong, int>();
foreach (var entry in entries)
{
current++;
string entryName;
if (GetEntryName(input,
fat,
entry,
hashes,
extractUnknowns,
onlyUnknowns,
out entryName) == false)
{
continue;
}
if (duplicates.ContainsKey(entry.NameHash) == true)
{
var number = duplicates[entry.NameHash]++;
var e = Path.GetExtension(entryName);
var nn =
Path.ChangeExtension(
Path.ChangeExtension(entryName, null) + "__DUPLICATE_" +
number.ToString(CultureInfo.InvariantCulture),
e);
entryName = Path.Combine("__DUPLICATE", nn);
}
else
{
duplicates[entry.NameHash] = 0;
}
if (filter != null &&
filter.IsMatch(entryName) == false)
{
continue;
}
var entryPath = Path.Combine(outputPath, entryName);
if (overwriteFiles == false &&
File.Exists(entryPath) == true)
{
continue;
}
if (verbose == true)
{
Console.WriteLine("[{0}/{1}] {2}",
current.ToString(CultureInfo.InvariantCulture).PadLeft(padding),
total,
entryName);
}
input.Seek(entry.Offset, SeekOrigin.Begin);
var entryParent = Path.GetDirectoryName(entryPath);
if (string.IsNullOrEmpty(entryParent) == false)
{
Directory.CreateDirectory(entryParent);
}
using (var output = File.Create(entryPath))
{
EntryDecompression.Decompress(entry, input, output);
}
}
}
}
}
}
private static bool GetEntryName(Stream input,
BigFile fat,
Big.Entry entry,
ProjectData.HashList <uint> hashes,
bool extractUnknowns,
bool onlyUnknowns,
out string entryName)
{
entryName = hashes[entry.NameHash];
if (entryName == null)
{
if (extractUnknowns == false)
{
return(false);
}
string type;
string extension;
{
var guess = new byte[64];
int read = 0;
if (entry.CompressionScheme == Big.CompressionScheme.None)
{
if (entry.CompressedSize > 0)
{
input.Seek(entry.Offset, SeekOrigin.Begin);
read = input.Read(guess, 0, (int)Math.Min(entry.CompressedSize, guess.Length));
}
}
else
{
using (var temp = new MemoryStream())
{
EntryDecompression.Decompress(entry, input, temp);
temp.Position = 0;
read = temp.Read(guess, 0, (int)Math.Min(temp.Length, guess.Length));
}
}
var tuple = FileDetection.Detect(guess, Math.Min(guess.Length, read));
type = tuple != null ? tuple.Item1 : "unknown";
extension = tuple != null ? tuple.Item2 : null;
}
entryName = entry.NameHash.ToString("X8");
if (string.IsNullOrEmpty(extension) == false)
{
entryName = Path.ChangeExtension(entryName, "." + extension);
}
if (string.IsNullOrEmpty(type) == false)
{
entryName = Path.Combine(type, entryName);
}
entryName = Path.Combine("__UNKNOWN", entryName);
}
else
{
if (onlyUnknowns == true)
{
return(false);
}
entryName = FilterEntryName(entryName);
}
return(true);
}
