public DownloadHandler(BLTEStream blte)
{
if (CASContainer.BuildConfig["download-size"][0] != null && blte.Length != long.Parse(CASContainer.BuildConfig["download-size"][0]))
{
CASContainer.Settings?.Logger.LogAndThrow(Logging.LogType.Critical, "Download File is corrupt.");
}
using (var br = new BinaryReader(blte))
{
Header = new DownloadHeader()
{
Header = br.ReadBytes(2),
Version = br.ReadByte(),
ChecksumSize = br.ReadByte(),
Unknown = br.ReadByte(),
NumEntries = br.ReadUInt32BE(),
NumTags = br.ReadUInt16BE(),
};
// entries
for (int i = 0; i < Header.NumEntries; i++)
{
var entry = new DownloadEntry()
{
Unknown = Header.Version > 1 ? br.ReadByte() : (byte)0, // new V2 field
Hash = new MD5Hash(br),
FileSize = br.ReadUInt40BE(),
Stage = br.ReadByte(),
UnknownData = br.ReadBytes(4)
};
Entries.Add(entry);
}
// tags
int numMaskBytes = ((int)Header.NumEntries + 7) / 8;
for (int i = 0; i < Header.NumTags; i++)
{
var tag = new DownloadTag()
{
Name = br.ReadCString(),
Type = br.ReadUInt16BE(),
BitMask = new BoolArray(br.ReadBytes(numMaskBytes))
};
Tags.Add(tag);
}
EncodingMap = blte.EncodingMap.ToArray();
endofStageIndex = new int[] // store last indice of each stage
{
Entries.FindLastIndex(x => x.Stage == 0),
Entries.FindLastIndex(x => x.Stage == 1)
};
}
blte?.Dispose();
}
public DownloadHandler(BLTEStream blte)
{
if (CASContainer.BuildConfig["download-size"][0] != null && blte.Length != long.Parse(CASContainer.BuildConfig["download-size"][0]))
{
CASContainer.Settings?.Logger.LogAndThrow(Logging.LogType.Critical, "Download File is corrupt.");
}
using (var br = new BinaryReader(blte))
{
Header = new DownloadHeader()
{
Header = br.ReadBytes(2),
Version = br.ReadByte(),
ChecksumSize = br.ReadByte(),
HasChecksum = br.ReadByte(),
NumEntries = br.ReadUInt32BE(),
NumTags = br.ReadUInt16BE(),
};
if (Header.Version >= 2)
{
Header.NumFlags = br.ReadByte();
}
if (Header.Version >= 3)
{
// TODO do we have a version 3 file to test with?
//Header.BasePriority = br.ReadByte();
//Header.Unknown_0D = br.ReadBytes(3);
throw new NotImplementedException("Download file versions newer than 2 are not supported.");
}
// entries
for (int i = 0; i < Header.NumEntries; i++)
{
var entry = new DownloadEntry()
{
EKey = new MD5Hash(br),
FileSize = br.ReadUInt40BE(),
Priority = br.ReadByte()
};
if (Header.HasChecksum != 0)
{
entry.Checksum = br.ReadUInt32BE();
}
if (Header.Version >= 2)
{
entry.Flags = (DownloadFlags[])(object)br.ReadBytes(Header.NumFlags);
}
Entries.Add(entry);
}
// tags
int numMaskBytes = ((int)Header.NumEntries + 7) / 8;
for (int i = 0; i < Header.NumTags; i++)
{
var tag = new DownloadTag()
{
Name = br.ReadCString(),
Type = br.ReadUInt16BE(),
BitMask = new BoolArray(br.ReadBytes(numMaskBytes))
};
// We need to remove trailing bits from the padded byte array.
while (tag.BitMask.Count != Entries.Count)
{
tag.BitMask.RemoveAt(tag.BitMask.Count - 1);
}
Tags.Add(tag);
}
EncodingMap = blte.EncodingMap.ToArray();
endofStageIndex = new int[] // store last indice of each stage
{
Entries.FindLastIndex(x => x.Priority == 0),
Entries.FindLastIndex(x => x.Priority == 1)
};
}
blte?.Dispose();
}
