public byte[] GetEntryContent(string entryName)
{
var entry = _entryTable[entryName];
if (entry == null)
{
return(null);
}
var extractReader = new BinaryReader(File.Open(PackagePath, System.IO.FileMode.Open));
var result = entry.IsCompressed
? GPakUtil.Decompress(GPakUtil.GetBytesFromFile(extractReader, entry.ContentOffset, entry.SizeInBytes))
: GPakUtil.GetBytesFromFile(extractReader, entry.ContentOffset, entry.SizeInBytes);
extractReader.Close();
return(result);
}
public void ExtractAll(string toDirectory = "")
{
if (toDirectory != "" && !Directory.Exists(toDirectory))
{
Directory.CreateDirectory(toDirectory);
}
var extractReader = new BinaryReader(File.Open(PackagePath, System.IO.FileMode.Open));
foreach (var(name, entry) in _entryTable)
{
var writer = new BinaryWriter(File.Open(Path.Combine(toDirectory, name), System.IO.FileMode.Create));
writer.Write(entry.IsCompressed
? GPakUtil.Decompress(GPakUtil.GetBytesFromFile(extractReader, entry.ContentOffset, entry.SizeInBytes))
: GPakUtil.GetBytesFromFile(extractReader, entry.ContentOffset, entry.SizeInBytes));
writer.Close();
}
extractReader.Close();
}
private void ReadEntries()
{
int i = GPakUtil.FirstEntryOffset;
while (i < PackageFileSize)
{
// Read 4 bytes to find the length of the entry's name
var entryNameLength =
GPakUtil.GetByteRangeAsInteger(GPakUtil.GetBytesFromFile(_packageFileReader, i, 4));
i += 4;
// Read ENTRY_NAME bytes to obtain it's name
var entryName =
GPakUtil.GetByteRangeAsString(GPakUtil.GetBytesFromFile(_packageFileReader, i, entryNameLength));
i += entryName.Length;
// Read 1 byte to check if the entry is compressed or not ("C" for compressed, "N" for not compressed)
var compressedFlag =
GPakUtil.GetByteRangeAsString(GPakUtil.GetBytesFromFile(_packageFileReader, i, 1));
i += 1;
var isCompressed = compressedFlag == "C";
// Read 4 bytes to get the size of the entry in the package
var entryContentSize =
GPakUtil.GetByteRangeAsInteger(GPakUtil.GetBytesFromFile(_packageFileReader, i, 4));
i += 4;
// Create a new entry based on the previously gathered info
_entryTable.Add(entryName, new GPakEntry(entryContentSize, isCompressed, i));
i += entryContentSize;
EntryCount++;
}
_packageFileReader.Close();
}
private bool IsHeaderValid()
{
var header = GPakUtil.GetBytesFromFile(_packageFileReader, 0, GPakUtil.FirstEntryOffset);
return(GPakUtil.GetByteRangeAsString(header).Equals(GPakUtil.Header));
}
