/// <summary>
/// Open the .far archive which is the given file.
/// </summary>
/// <param name="path"></param>
public FSARPackage(IFile f)
{
FileName = f.Name;
root = new FSARDirectory(null, ROOT_DIR);
filestream = f.GetStream();
uint magic = filestream.ReadUInt32BE();
if (magic == 0x46534743) // "FSGC"
{
throw new NotSupportedException("File is encrypted (FSGC).");
}
if (magic != 0x46534152) // "FSAR"
{
throw new InvalidDataException("File does not have a valid FSAR header.");
}
filestream.Position = 8;
uint file_base = filestream.ReadUInt32BE();
uint num_files = filestream.ReadUInt32BE();
filestream.Position = 0x20;
for (int i = 0; i < num_files; i++)
{
filestream.Position = 0x20 + 0x120 * i;
string fpath = filestream.ReadASCIINullTerminated();
filestream.Position = 0x20 + 0x120 * i + 0x100;
long size = filestream.ReadInt64BE();
long zsize = filestream.ReadInt64BE();
long offset = filestream.ReadInt64BE();
uint zipped = filestream.ReadUInt32BE();
FSARDirectory dir = makeOrGetDir(fpath);
string filename = fpath.Split('\\').Last();
dir.AddFile(new FSARFile(filename, dir, size, zipped != 1, zsize, offset + file_base, filestream));
}
}
/// <summary>
/// Get the directory at the end of this path, or make it (and all
/// intermediate dirs) if it doesn't exist.
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
private FSARDirectory makeOrGetDir(string path)
{
string[] breadcrumbs = path.Split('\\');
IDirectory last = root;
IDirectory current;
if (breadcrumbs.Length == 1)
{
return(root);
}
for (var idx = 0; idx < breadcrumbs.Length - 1; idx++)
{
if (!last.TryGetDirectory(breadcrumbs[idx], out current))
{
current = new FSARDirectory(last, breadcrumbs[idx]);
(last as FSARDirectory).AddDir(current as FSARDirectory);
}
last = current;
}
return(last as FSARDirectory);
}
