public void AddP4KFile(P4KFile file, string filename, byte[] data, ref CentralDirectory central_directory, ref FileStructure file_structure)
{
if (!Files.ContainsValue(file))
{
file.centralDirectory = new CentralDirectory(filename, data);
file.FileStructure = new FileStructure(filename, data);
// Add this first otherwise the Locator count wont be correct
Files[file.Filepath] = file;
AllocateFilesystemChunk(
data.Length + 0x1000, // add an extra chunk in for the fileinfo
out long allocation_offset,
out long total_allocated_size,
false
);
file.centralDirectory.Extra.data_offset = allocation_offset;
var crypt = new SHA256Managed();
file.centralDirectory.Extra.sha256_hash = crypt.ComputeHash(data);
var mutex = this.GetStream(out FileStream stream, out CustomBinaryReader reader, out CustomBinaryWriter writer);
// these are the same for some reason... weird
file.FileStructure.Extra.DataOffset = file.centralDirectory.Extra.data_offset;
// write fileinfo
stream.Position = allocation_offset;
file.FileStructure.WriteBinaryToStream(stream, writer, true);
// not actually part of the structure, just a useful helper to get the data as its
// immediately after this structure
file.FileStructure.Extra.FileDataOffset = stream.Position;
file.centralDirectory.Extra.compressed_file_length = file.FileStructure.Extra.CompressedFileLength;
file.centralDirectory.Extra.uncompressed_file_length = file.FileStructure.Extra.UncompressedFileLength;
writer.Write(data);
WriteContentDirectoryChunk(stream, reader, writer);
mutex.ReleaseMutex();
}
}
public object ReadPK(Stream stream, CustomBinaryReader reader, Int64 offset)
{
stream.Seek(offset, SeekOrigin.Begin);
var magic = reader.ReadInt16();
if (magic != 0x4B50)
{
throw new Exception("Invalid PK offset");
}
Signature signature = (Signature)reader.ReadInt16();
switch (signature)
{
case Signature.CentralDirectory:
CentralDirectory centralDirectory = new CentralDirectory(stream, reader);
if (Logging)
{
Console.WriteLine($"Found CentralDirectory {centralDirectory.Filename}");
}
if (Logging)
{
Console.WriteLine($"Searching for FileStructure @{centralDirectory.Extra.data_offset.ToString("X")}");
}
return(centralDirectory);
case Signature.FileStructure:
FileStructure fileStructure = new FileStructure(stream, reader);
if (Logging)
{
Console.WriteLine($"Found FileStructure {fileStructure.Filename}");
}
return(fileStructure);
case Signature.CentralDirectoryLocator:
CentralDirectoryLocator centralDirectoryLocator = new CentralDirectoryLocator(stream, reader);
if (Logging)
{
Console.WriteLine($"Found CentralDirectoryLocator @{offset}");
}
return(centralDirectoryLocator);
case Signature.CentralDirectoryLocatorOffset:
CentralDirectoryLocatorOffset centralDirectoryLocatorOffset = new CentralDirectoryLocatorOffset(stream, reader);
if (Logging)
{
Console.WriteLine($"Found CentralDirectoryLocatorOffset @{offset}");
}
return(centralDirectoryLocatorOffset);
case Signature.CentralDirectoryEnd:
CentralDirectoryEnd centralDirectoryEnd = new CentralDirectoryEnd(stream, reader);
if (Logging)
{
Console.WriteLine($"Found CentralDirectoryEnd @{offset}");
}
return(centralDirectoryEnd);
default:
throw new NotImplementedException();
}
}