protected override SRFile CreateFromStream(string path, Stream stream)
{
var file = new SCUMM1File(path, (XorStream)stream);
;
if (!CheckFormat(path, file))
{
file.Close();
file = null;
}
return(file);
}
private bool CheckFormat(string path, SCUMM1File file)
{
// Detection here is a bit hacky:
// - We NEED the file to be named xx.LFL
// - We NEED the file to be stored along with the 00.LFL directory (it provides our check)
// - We NEED it to use the same encryption as the directory
if (!String.Equals(Path.GetExtension(path), ".lfl", StringComparison.OrdinalIgnoreCase))
{
// Not the correct file extension
return(false);
}
int fileNumber;
string strFileNumber = Path.GetFileNameWithoutExtension(path);
if (!Int32.TryParse(strFileNumber, out fileNumber))
{
// Not the correct file name (decimal digits)
return(false);
}
if (fileNumber == 0)
{
// Directory file
file.IsDirectory = true;
file.FileVersion = GetDirectoryVersion(file);
}
else
{
// Resource file - determine version through Directory file
var directoryFile = SCUMM1File.OpenDirectory(path);
if (directoryFile == null)
{
return(false);
}
file.FileVersion = GetDirectoryVersion(directoryFile);
file.Encryption = directoryFile.Encryption;
directoryFile.Close();
}
return(true);
}
