/// <summary>
/// Tries to map the filenames of all the AFS file entries with the give IDX file.
/// </summary>
public void MapIDXFile(IDX idx)
{
for (int i = 0; i < idx.Entries.Count; i++)
{
IDXEntry entry = idx.Entries[i];
if (i >= Entries.Count)
{
break;
}
Entries[i].IDXFilename = entry.Filename;
}
}
protected override void _Read(BinaryReader reader)
{
long baseOffset = reader.BaseStream.Position;
Signature = reader.ReadUInt32();
if (!IsValid(Signature))
{
throw new InvalidFileSignatureException();
}
FileCount = reader.ReadUInt32();
Entries.Clear();
//read file offsets (table of content)
uint index = 0;
for (int i = 0; i < FileCount; i++)
{
AFSEntry entry = new AFSEntry();
entry.ReadOffset(reader);
entry.Index = index;
Entries.Add(entry);
index++;
}
//Read filename table offset
//This limit is just a guess, needs testing
if (FileCount > 1016)
{
reader.BaseStream.Seek(baseOffset + 0x0008000 - 8, SeekOrigin.Begin);
FilenameSectionOffset = reader.ReadUInt32();
FilenameSectionSize = reader.ReadUInt32();
}
else
{
long offset = reader.BaseStream.Position + 0x0800 - (reader.BaseStream.Position % 0x0800);
reader.BaseStream.Seek(baseOffset + offset - 8, SeekOrigin.Begin);
FilenameSectionOffset = reader.ReadUInt32();
FilenameSectionSize = reader.ReadUInt32();
}
if (FilenameSectionOffset == 0)
{
//Set incrementing filenames if table of content is missing.
for (int i = 0; i < FileCount; i++)
{
Entries[i].Filename = "file_" + i;
}
}
else
{
//Read table of contents
reader.BaseStream.Seek(baseOffset + FilenameSectionOffset, SeekOrigin.Begin);
for (int i = 0; i < FileCount; i++)
{
Entries[i].ReadFilename(reader);
}
}
//Read file data
foreach (AFSEntry entry in Entries)
{
reader.BaseStream.Seek(baseOffset + entry.Offset, SeekOrigin.Begin);
entry.ReadData(reader);
}
if (AutomaticLoadIDX)
{
if (typeof(FileStream).IsAssignableFrom(reader.BaseStream.GetType()))
{
FileStream fs = (FileStream)reader.BaseStream;
string idxPath = Path.ChangeExtension(fs.Name, ".IDX");
if (File.Exists(idxPath))
{
IDX idx = new IDX(idxPath);
MapIDXFile(idx);
}
}
}
}
