public byte[] GetFile(DirTreeEntry entry)
{
byte[] result = new byte[entry.PackedSize];
FileStream fileStream = new FileStream(datFileName, FileMode.Open);
fileStream.Seek(entry.Offset, SeekOrigin.Begin);
fileStream.Read(result, 0, entry.PackedSize);
fileStream.Close();
if (entry.IsCompressed)
{
return(DecompressFile(result, entry.RealSize));
}
return(result);
}
public DatFile(string fileName)
{
datFileName = fileName;
fileStream = new FileStream(datFileName, FileMode.Open);
GetFileData();
archiveFullSize = GetArchiveFullSize();
treeSize = GetTreeSize();
dirTreeOffset = fileLength - treeSize - 4;
filesTotal = GetFilesTotal();
currentOffset = dirTreeOffset;
for (int i = 0; i < filesTotal; i++)
{
entry = GetTreeEntry(currentOffset);
entries.Add(entry);
currentOffset = entry.EndOffset;
}
fileStream.Close();
}
private DirTreeEntry GetTreeEntry(int offset)
{
DirTreeEntry result = new DirTreeEntry();
result.FileNameSize = GetDwordValue(offset);
offset += 4;
result.FileName = GetStringValue(offset, result.FileNameSize);
offset += result.FileNameSize;
result.IsCompressed = Convert.ToBoolean(GetByteValue(offset));
offset += 1;
result.RealSize = GetDwordValue(offset);
offset += 4;
result.PackedSize = GetDwordValue(offset);
offset += 4;
result.Offset = GetDwordValue(offset);
result.EndOffset = offset + 4;
return(result);
}