public static IEnumerable <WZProperty> ImageChildren(WZProperty self)
{
using (WZReader reader = self.FileContainer.GetContentReader(null, self))
{
if (self.Offset >= reader.BaseStream.Length)
{
yield break;
}
reader.BaseStream.Seek(self.Offset, SeekOrigin.Begin);
if (reader.ReadByte() != 0x73)
{
throw new InvalidOperationException("Image should have header of 0x73");
}
long oldPosition = reader.BaseStream.Position;
if (!reader.ReadWZString(false, self.Encrypted).Equals("Property"))
{
reader.BaseStream.Position = oldPosition;
if (!reader.ReadWZStringExpecting(out self.Encrypted, "Property", false))
{
throw new InvalidOperationException("Unknown encryption method");
}
}
if (reader.ReadInt16() != 0)
{
throw new InvalidOperationException("Image needs to have 0 as part of header");
}
foreach (WZProperty prop in PropertyList(reader, self).ToArray())
{
yield return(prop);
}
}
}
public static WZProperty Image(WZReader reader, WZProperty self)
{
if (self.Offset >= reader.BaseStream.Length)
{
return(self);
}
self.ContainerStartLocation = self.Offset;
reader.Container = self;
byte imgType = reader.ReadByte();
if (imgType == 1)
{
return(new WZPropertyWeak <string>(() =>
{
using (reader = self.FileContainer.GetContentReader(null, self))
{
reader.BaseStream.Seek(self.Offset, SeekOrigin.Begin);
reader.ReadByte();
return reader.ReadLuaScript();
}
}, self.NameWithoutExtension, self.Path, self.FileContainer, PropertyType.Lua, self.Parent, self.Size, self.Checksum, self.Offset));
}
if (imgType != 0x73)
{
throw new InvalidOperationException("Unknown image type, not supported!");
}
long oldPosition = reader.BaseStream.Position;
if (!reader.ReadWZString(false, self.Encrypted).Equals("Property"))
{
reader.BaseStream.Position = oldPosition;
if (!reader.ReadWZStringExpecting(out self.Encrypted, "Property", false))
{
throw new InvalidOperationException("Unknown encryption method");
}
}
if (reader.ReadInt16() != 0)
{
throw new InvalidOperationException("Image needs to have 0 as part of header");
}
return(self);
}
private bool GuessVersionWithImageOffsetAt(short ver, long offset)
{
bool success = false;
for (ushort v = 0; v < ushort.MaxValue; v++)
{
uint vHash = v.ToString()
.Aggregate <char, uint>(0, (current, t) => (32 * current) + t + 1);
if ((0xFF ^ (vHash >> 24) ^ (vHash << 8 >> 24) ^ (vHash << 16 >> 24) ^ (vHash << 24 >> 24)) != ver)
{
continue;
}
_r.BaseStream.Seek(offset, SeekOrigin.Begin);
_r.VersionKey = vHash;
VersionKey = vHash;
VersionId = v;
try
{
long currentOffset = _r.BaseStream.Position;
_r.BaseStream.Seek(_r.ReadWZOffset(), SeekOrigin.Begin);
byte childType = _r.ReadByte();
if (childType == 0x73)
{
long oldPosition = _r.BaseStream.Position;
if (!_r.ReadWZStringExpecting(out IsEncrypted, "Property", false))
{
_r.BaseStream.Position = oldPosition;
continue;
}
success = true;
_r.BaseStream.Position = oldPosition;
break;
}
else if (childType == 0x01)
{
// Lua script, impossible to guarantee found valid version
string luaScript = _r.ReadLuaScript();
if (luaScript.StartsWith("!version"))
{
EncryptionType encTesting = EncryptionType.None;
bool wrongEncryption = false;
do
{
PackageCollection col = new PackageCollection();
using (Package p = new Package(col, PackagePath, v))
{
p.MainDirectory.Encrypted = encTesting;
IEnumerable <WZProperty> children = p.MainDirectory.Children;
WZProperty firstImg;
do
{
firstImg = children.FirstOrDefault(c => c.Type == PropertyType.Image);
wrongEncryption = children.Any(c => c.Name.Contains("?"));
if (firstImg == null && !wrongEncryption)
{
children = children.Where(c => c != null).SelectMany(c => c.Children ?? new WZProperty[0]).Where(c => c != null).ToArray();
}
} while (firstImg == null && children.Count() > 0 && !wrongEncryption);
if (firstImg != null)
{// No imgs???
if (encTesting == EncryptionType.None)
{
encTesting = IsEncrypted = firstImg.Encrypted;
}
else
{
IsEncrypted = encTesting;
}
success = true;
break;
}
else if (wrongEncryption)
{
encTesting = (EncryptionType)(((int)encTesting) + 1);
}
else
{
break;
}
if ((int)encTesting == 3)
{
break;
}
}
} while (wrongEncryption);
if (!wrongEncryption && !success)
{
IsEncrypted = encTesting;
success = true;
}
break;
}
}
}
catch
{
success = false;
}
}
return(success);
}