public VolFile(Stream stream, string filename)
{
Name = filename;
this.stream = stream;
try
{
stream.ReadBytes(4);
var directoryOffset = BitConverter.ToInt32(stream.ReadBytes(4), 0);
var fileCount = BitConverter.ToInt32(stream.ReadBytes(4), 0);
stream.Seek(directoryOffset, SeekOrigin.Begin);
for (int i = 0; i < fileCount; i++)
{
var entryFilename = stream.ReadASCII(28);
entryFilename = entryFilename.Replace("\0", string.Empty);
var offset = BitConverter.ToInt32(stream.ReadBytes(4), 0);
var size = BitConverter.ToInt32(stream.ReadBytes(4), 0);
// Ignore duplicate files
if (index.ContainsKey(entryFilename))
{
continue;
}
var info = new VolEntry()
{
Filename = entryFilename, Offset = offset, Size = size
};
index.Add(entryFilename, info);
}
}
catch
{
Dispose();
throw;
}
}
public VolFile(Stream stream, string filename)
{
Name = filename;
this.stream = stream;
var magicByte = stream.ReadASCII(4);
if (magicByte != "VOL ")
{
return;
}
var unknown1 = stream.ReadUInt32();
var header = stream.ReadASCII(4);
var zero = stream.ReadUInt32();
if (header != "volh" && zero != 0)
{
return;
}
var volumeSection = stream.ReadASCII(4);
if (volumeSection != "vols")
{
return;
}
var unknown2 = stream.ReadUInt32();
var directoryOffset = stream.ReadUInt32();
var entryFilenames = new List <string>();
while (true)
{
var entryFilename = stream.ReadASCIIZ();
if (string.IsNullOrEmpty(entryFilename))
{
break;
}
entryFilenames.Add(entryFilename);
}
while (true)
{
if (stream.ReadByte() != 0)
{
break;
}
}
stream.Seek(-1, SeekOrigin.Current);
var volumeIndex = stream.ReadASCII(4);
if (volumeIndex != "voli")
{
return;
}
var totalSize = stream.ReadUInt32();
foreach (var entryFilename in entryFilenames)
{
var filenameIndex = stream.ReadUInt32();
var offset = stream.ReadUInt32();
var size = stream.ReadUInt32();
var compression = stream.ReadByte();
var valid = stream.ReadByte();
if (valid != 0 && valid != 1)
{
throw new InvalidDataException("Check byte contains invalid values");
}
// Ignore duplicate files
if (index.ContainsKey(entryFilename))
{
continue;
}
var info = new VolEntry()
{
Filename = entryFilename,
Offset = offset + 8,
Size = size,
Compression = compression,
};
if (compression != 0)
{
throw new NotImplementedException("'RLE', 'LZ', 'LZH' are not yet supported.");
}
index.Add(entryFilename, info);
}
}