private void Parse(DatReader reader, List <DatFile> allFiles)
{
reader.Seek(Offset); // actual directories are 2 DWORDS over, but validate those 2 DWORDS are 0
uint word1 = reader.ReadUInt32();
uint word2 = reader.ReadUInt32();
if (word1 != 0 || word2 != 0)
{
return;
}
byte[] buffer = new byte[DatConstants.DIR_BLOCK_SIZE];
reader.Read(buffer, 0, buffer.Length);
// directories
for (int i = 0; i < DatConstants.MAX_DIRS; i++)
{
uint newDirSize = BitConverter.ToUInt32(buffer, (i * 2) * sizeof(uint));
uint newDirOffset = BitConverter.ToUInt32(buffer, (i * 2) * sizeof(uint) + 4);
if (Size != newDirSize)
{
break;
}
if (newDirOffset == 0x00)
{
break;
}
if (newDirOffset == 0xCDCDCDCD)
{
break;
}
var subDir = new DatDirectory(newDirOffset, newDirSize);
Directories.Add(subDir);
}
buffer = new byte[DatConstants.FILE_BLOCK_SIZE];
reader.Read(buffer, 0, buffer.Length);
// files
for (int i = 0; i < DatConstants.MAX_FILES; i++)
{
// each file is 8 DWORDS
int thisFile = i * 8 * sizeof(uint);
DatFile df = DatFile.FromDirectoryBuffer(buffer, thisFile);
if (df != null)
{
Files.Add(df);
allFiles.Add(df);
}
else
{
break; // null file means end of listing
}
}
Directories.ForEach(d => d.Parse(reader, allFiles));
}
public byte[] GetData(uint offset, int length)
{
try
{
byte[] buffer = new byte[length];
using (var dr = new DatReader(_filename))
{
dr.Seek(offset, SeekOrigin.Begin);
dr.Read(buffer, 0, length);
}
return(buffer);
}
catch (OutOfMemoryException)
{
return(System.Text.ASCIIEncoding.ASCII.GetBytes("Not enough memory."));
}
}