public void Save(string path)
{
using (var fs = new FileStream(path, FileMode.Create))
using (var bs = new BinaryStream(fs, ByteConverter.Big))
{
bs.WriteString(MAGIC, StringCoding.Raw);
bs.Position += 4;
bs.Position += 4; // Skip prefixes offset for now
bs.WriteInt32(NameTrees.Count);
bs.Position += NameTrees.Count * sizeof(uint);
bs.AlignWithValue(0x10, 0x5E);
long lastPos = bs.Position;
for (int i = 0; i < NameTrees.Count; i++)
{
var currentTree = NameTrees[i];
bs.Position = lastPos;
int baseTreePos = (int)bs.Position;
// For now skip everything and go to the string tables
bs.Position += 0x10;
bs.Position += 0x10 * currentTree.Entries.Count;
OptimizedStringTable opt = NameTrees[i].GetStringTable();
opt.SaveStream(bs);
bs.AlignWithValue(0x10, 0x5E);
lastPos = bs.Position;
// Write where the tree is located
bs.Position = 0x10 + (i * sizeof(uint));
bs.WriteInt32(baseTreePos);
// Write its data
bs.Position = baseTreePos;
bs.WriteInt32(100);
bs.WriteInt32(currentTree.Entries.Count);
bs.AlignWithValue(0x10, 0x5E);
for (int j = 0; j < currentTree.Entries.Count; j++)
{
var entry = currentTree.Entries[j];
bs.WriteUInt32(entry.SpecDBID);
bs.WriteUInt32(entry.AlphabeticalID);
bs.WriteInt32(opt.GetStringOffset(entry.FullName));
bs.WriteBytes(new byte[] { 0xFF, 0xFF, 0xFF, 0xFF });
}
}
// Write the prefix tree
bs.Position = lastPos;
bs.WriteInt32(Prefixes.Count); // 4 byte header
// Skip entries
bs.Position += Prefixes.Count * sizeof(uint);
OptimizedStringTable prefixST = GetPrefixStringTable();
prefixST.SaveStream(bs);
bs.Align(0x10, true);
// String table
bs.Position = lastPos + 4;
foreach (var prefix in Prefixes)
{
bs.WriteInt32(prefixST.GetStringOffset(prefix.Name));
}
// Write prefix tree offset
bs.Position = 0x08;
bs.WriteInt32((int)lastPos);
}
}
public void Pack(string outputFileName, bool bigEndian = true)
{
Console.WriteLine($"[:] GPB: Packing {Files.Count} to -> {outputFileName}..");
using var fs = new FileStream(outputFileName, FileMode.Create);
using var bs = new BinaryStream(fs, bigEndian ? ByteConverter.Big : ByteConverter.Little);
if (bigEndian)
{
bs.WriteString("3bpg", StringCoding.Raw);
}
else
{
bs.WriteString("gpb3", StringCoding.Raw);
}
bs.WriteInt32(0);
bs.WriteInt32(HeaderSize); // Header Size
bs.WriteInt32(Files.Count);
// Write all file names first
int baseFileNameOffset = HeaderSize + (EntrySize * Files.Count);
int currentFileNameOffset = baseFileNameOffset;
// Game uses bsearch, important
Files = Files.OrderBy(e => e.FileName).ToList();
for (int i = 0; i < Files.Count; i++)
{
bs.Position = HeaderSize + (i * EntrySize);
bs.WriteInt32(currentFileNameOffset);
bs.Position = currentFileNameOffset;
bs.WriteString(Files[i].FileName, StringCoding.ZeroTerminated);
currentFileNameOffset = (int)bs.Position;
}
bs.AlignWithValue(0x80, 0x5E, true);
int baseDataOffset = (int)bs.Position; // Align with 0x5E todo
int currentFileDataOffset = baseDataOffset;
// Write the buffers
for (int i = 0; i < Files.Count; i++)
{
bs.Position = HeaderSize + (i * EntrySize) + 4;
bs.WriteInt32(currentFileDataOffset);
bs.WriteInt32(Files[i].FileData.Length);
bs.Position = currentFileDataOffset;
bs.WriteBytes(Files[i].FileData);
bs.AlignWithValue(0x80, 0x5E, true);
currentFileDataOffset = (int)bs.Position;
}
bs.Position = 0x10;
bs.WriteInt32(HeaderSize); // Offset of entries
bs.WriteInt32(baseFileNameOffset);
bs.WriteInt32(baseDataOffset);
Console.WriteLine($"[:] GPB: Done packing {Files.Count} files to {outputFileName}.");
}