private CLibFile[] ReadCLib30(BinaryReader reader)
{
Int32 seed = reader.ReadInt32();
//NOTE(adm244): assuming asset files are stored sequentially
Int32 filesCount = reader.ReadInt32();
CLibFile[] files = new CLibFile[filesCount];
for (int i = 0; i < files.Length; ++i)
{
files[i] = new CLibFile();
files[i].Filename = reader.ReadCString();
}
Int32 assetsCount = reader.ReadInt32();
for (int i = 0; i < assetsCount; ++i)
{
CLibAsset asset = new CLibAsset();
asset.Filename = reader.ReadCString();
byte index = reader.ReadByte();
asset.Offset = reader.ReadInt64();
asset.Size = reader.ReadInt64();
if (index >= files.Length)
{
throw new InvalidDataException("CLib file index is incorrect!");
}
files[index].Assets.Add(asset);
}
return(files);
}
private CLibFile[] ReadCLib21(BinaryReader reader)
{
Int32 seed = reader.ReadInt32() + EncryptionSeedSalt;
AGSEncoder encoder = new AGSEncoder(seed);
//NOTE(adm244): assuming asset files are stored sequentially
Int32 filesCount = encoder.ReadInt32(reader);
CLibFile[] files = new CLibFile[filesCount];
for (int i = 0; i < files.Length; ++i)
{
files[i] = new CLibFile();
}
for (int i = 0; i < files.Length; ++i)
{
files[i].Filename = encoder.ReadString(reader);
}
Int32 assetsCount = encoder.ReadInt32(reader);
AGSCLibAsset[] assets = new AGSCLibAsset[assetsCount];
for (int i = 0; i < assets.Length; ++i)
{
assets[i] = new AGSCLibAsset();
}
for (int i = 0; i < assetsCount; ++i)
{
assets[i].Filename = encoder.ReadString(reader);
}
for (int i = 0; i < assetsCount; ++i)
{
assets[i].Offset = encoder.ReadInt32(reader);
}
for (int i = 0; i < assetsCount; ++i)
{
assets[i].Size = encoder.ReadInt32(reader);
}
for (int i = 0; i < assetsCount; ++i)
{
assets[i].AssetFileIndex = encoder.ReadInt8(reader);
}
return(BuildAssetsLists(assets, ref files));
}
private CLibFile[] ReadCLib(BinaryReader reader)
{
CLibFile[] files = new CLibFile[0];
byte version = reader.ReadByte();
//TODO(adm244): legacy\community engine supports only these, add support for other versions
if ((version != 6) && (version != 10) &&
(version != 11) && (version != 15) &&
(version != 20) && (version != 21) &&
(version != 30))
{
throw new NotImplementedException("CLib version is not supported!");
}
if (version >= 10) // multi-file
{
byte index = reader.ReadByte();
if (index != 0)
{
throw new InvalidDataException("CLib file index is not 0!\nAre you trying to read a wrong CLib file?");
}
if (version >= 30)
{
files = ReadCLib30(reader);
}
else if (version >= 21)
{
files = ReadCLib21(reader);
}
else
{
files = ReadCLibPre21(reader, version);
}
}
else
{
files = ReadCLibPre10(reader, version);
}
return(files);
}
private CLibFile[] ReadCLibPre10(BinaryReader reader, int version)
{
CLibFile[] files = new CLibFile[1];
files[0] = new CLibFile();
files[0].Filename = RootFilename;
byte salt = reader.ReadByte();
byte reserved = reader.ReadByte();
Int16 assetsCount = reader.ReadInt16();
AGSCLibAsset[] assets = new AGSCLibAsset[assetsCount];
//TODO(adm244): figure out how it's used in pre 6, ignored for now
byte[] password = reader.ReadBytes(13);
for (int i = 0; i < assets.Length; ++i)
{
assets[i] = new AGSCLibAsset();
string filename = reader.ReadFixedCString(13);
assets[i].Filename = AGSEncryption.DecryptSalt(filename, salt);
}
for (int i = 0; i < assetsCount; ++i)
{
assets[i].Size = reader.ReadInt32();
}
//TODO(adm244): read "flags and ratio", skipping for now
reader.BaseStream.Seek(assetsCount * sizeof(Int16), SeekOrigin.Current);
assets[0].Offset = reader.BaseStream.Position;
for (int i = 1; i < assets.Length; ++i)
{
assets[i].Offset = assets[i - 1].Offset + assets[i - 1].Size;
}
return(BuildAssetsLists(assets, ref files));
}
//private CLibFile[] ReadCLib20(BinaryReader reader)
//{
// //NOTE(adm244): assuming asset files are stored sequentially
// Int32 filesCount = reader.ReadInt32();
// CLibFile[] files = new CLibFile[filesCount];
// for (int i = 0; i < files.Length; ++i)
// files[i].Filename = reader.ReadCString(50);
//
// Int32 assetsCount = reader.ReadInt32();
// AGSCLibAsset[] assets = new AGSCLibAsset[assetsCount];
//
// for (int i = 0; i < assets.Length; ++i)
// {
// Int16 length = reader.ReadInt16();
// length /= 5;
//
// byte[] jibzler = reader.ReadBytes(length);
// assets[i].Filename = AGSEncryption.DecryptJibzle(jibzler);
// }
//
// for (int i = 0; i < assets.Length; ++i)
// assets[i].Offset = reader.ReadInt32();
//
// for (int i = 0; i < assets.Length; ++i)
// assets[i].Size = reader.ReadInt32();
//
// for (int i = 0; i < assets.Length; ++i)
// assets[i].AssetFileIndex = reader.ReadByte();
//
// return BuildAssetsLists(assets, ref files);
//}
private CLibFile[] ReadCLibPre21(BinaryReader reader, int version)
{
Int32 filesCount = reader.ReadInt32();
CLibFile[] files = new CLibFile[filesCount];
for (int i = 0; i < files.Length; ++i)
{
files[i] = new CLibFile();
if (version == 20)
{
files[i].Filename = reader.ReadCString(50);
}
else
{
files[i].Filename = reader.ReadFixedCString(20);
}
}
Int32 asset_count = reader.ReadInt32();
AGSCLibAsset[] assets = new AGSCLibAsset[asset_count];
for (int i = 0; i < assets.Length; ++i)
{
assets[i] = new AGSCLibAsset();
if (version == 20)
{
Int16 length = reader.ReadInt16();
length /= 5;
byte[] jibzler = reader.ReadBytes(length);
assets[i].Filename = AGSEncryption.DecryptJibzle(jibzler);
}
else if (version >= 11)
{
byte[] jibzler = reader.ReadBytes(25);
assets[i].Filename = AGSEncryption.DecryptJibzle(jibzler);
}
else
{
assets[i].Filename = reader.ReadFixedCString(25);
}
}
for (int i = 0; i < assets.Length; ++i)
{
assets[i].Offset = reader.ReadInt32();
}
for (int i = 0; i < assets.Length; ++i)
{
assets[i].Size = reader.ReadInt32();
}
for (int i = 0; i < assets.Length; ++i)
{
assets[i].AssetFileIndex = reader.ReadByte();
}
return(BuildAssetsLists(assets, ref files));
}
private AssetsManager()
{
RootFilename = string.Empty;
RootFolder = string.Empty;
Files = new CLibFile[0];
}