private bool DepthFirstImageSearch(out long offset)
{
bool success = false;
offset = -1;
int count = _r.ReadWZInt();
for (int i = 0; i < count; i++)
{
byte type = _r.ReadByte();
Logging(type.ToString());
switch (type)
{
case 1:
_r.BaseStream.Seek(10, SeekOrigin.Current);
continue;
case 2:
int x = _r.ReadInt32();
type = _r.PeekFor(() => {
_r.BaseStream.Seek(x + _r.ContentsStart, SeekOrigin.Begin);
return(_r.ReadByte());
});
break;
case 3:
case 4:
_r.ReadWZString();
break;
default:
throw new Exception("Unknown object type in WzDirectory.");
}
_r.ReadWZInt();
_r.ReadWZInt();
offset = _r.BaseStream.Position;
if (type == 4)
{
success = true;
break;
}
if (type == 3)
{
try {
offset = _r.PeekFor(() => {
_r.BaseStream.Seek(_r.ReadWZOffset(), SeekOrigin.Begin);
long o;
success = DepthFirstImageSearch(out o);
return(o);
});
break;
} catch {}
}
_r.BaseStream.Seek(4, SeekOrigin.Current);
}
return(success);
}
public static IEnumerable <WZProperty> DirectoryChildren(WZProperty self)
{
using (WZReader reader = self.FileContainer.GetContentReader(null, self))
{
reader.BaseStream.Seek(self.Offset, SeekOrigin.Begin);
int count = reader.ReadWZInt();
WZProperty[] children = new WZProperty[count];
string name = null;
for (int i = 0; i < count; ++i)
{
byte type = reader.ReadByte();
switch (type)
{
case 1:
reader.ReadBytes(10);
continue;
case 2:
int dedupedAt = (int)(reader.ReadInt32() + reader.ContentsStart);
reader.PeekFor(() => {
reader.BaseStream.Position = dedupedAt;
type = reader.ReadByte();
name = reader.ReadWZString(false, self.Encrypted | self.Container.Encrypted);
});
break;
case 3:
case 4:
name = reader.ReadWZString(false, self.Encrypted | self.Container.Encrypted);
break;
default:
throw new Exception("Unknown child type");
}
if (name == null)
{
throw new InvalidOperationException("Found a property without a name, this shouldn't be possible.");
}
uint size = (uint)reader.ReadWZInt();
int checksum = reader.ReadWZInt();
uint offset = reader.ReadWZOffset();
WZProperty childProperty = new WZProperty(
name,
self != null ? Path.Combine(self.Path, name) : name,
reader.Package,
type == 3 ? PropertyType.Directory : type == 4 ? PropertyType.Image : throw new InvalidOperationException("Not sure what this is, but I don't handle it"),
self,
size,
checksum,
offset
);
// These can be lazy loaded
yield return(Resolve(reader.Package, childProperty));
}
}
}