public static long CalculateRomFsSize(IList <IArchiveFileInfo> files, UPath rootDirectory)
{
var rootNode = RomFsDirectoryNode.Parse(files, rootDirectory);
long totalSize = BlockSize_;
// Calculate meta size
totalSize += GetHashTableEntryCount(rootNode.DirectoryCount) * 4;
totalSize += GetHashTableEntryCount(files.Count) * 4;
totalSize += rootNode.SizeInBytes;
totalSize += files.Sum(x => MetaData.FileEntry.Size + ((Encoding.Unicode.GetByteCount(x.FilePath.GetName()) + 3) & ~3));
// Calculate file size
totalSize = (totalSize + 0xF) & ~0xF;
totalSize += files.Sum(x => (x.FileSize + 0xF) & ~0xF);
totalSize = (totalSize + BlockSize_ - 1) & ~(BlockSize_ - 1);
// Calculate hash level sizes
var levelSize = totalSize - BlockSize_;
for (var i = 0; i < 2; i++)
{
var currentLevelSize = levelSize / BlockSize_ * 0x20;
currentLevelSize = (currentLevelSize + BlockSize_ - 1) & ~(BlockSize_ - 1);
totalSize += currentLevelSize;
levelSize = currentLevelSize;
}
return(totalSize);
}
public static (long, long) Build(Stream input, IList <IArchiveFileInfo> files, UPath rootDirectory)
{
// Parse files into file tree
var rootNode = RomFsDirectoryNode.Parse(files, rootDirectory);
// Create MetaData Tree
var metaData = new MetaData
{
DirMetaOffset = rootNode.Directories.Count <= 0 ? UnusedEntry_ : 0x18
};
metaData.Dirs.Add(new MetaData.DirEntry
{
MetaOffset = 0,
ParentOffset = 0,
NextSiblingOffset = UnusedEntry_,
FirstChildOffset = rootNode.Directories.Count <= 0 ? UnusedEntry_ : 0x18,
FirstFileOffset = 0,
NextDirInSameBucket = UnusedEntry_,
Hash = CalculatePathHash(0, Encoding.Unicode.GetBytes(string.Empty)),
Name = string.Empty
});
PopulateMetaData(metaData, rootNode, metaData.Dirs[0]);
// Creating directory hash buckets
metaData.DirHashTable = Enumerable.Repeat(0xFFFFFFFF, GetHashTableEntryCount(metaData.Dirs.Count)).ToArray();
PopulateDirHashTable(metaData.Dirs, metaData.DirHashTable);
// Creating file hash buckets
metaData.FileHashTable = Enumerable.Repeat(0xFFFFFFFF, GetHashTableEntryCount(metaData.Files.Count)).ToArray();
PopulateFileHashTable(metaData.Files, metaData.FileHashTable);
// Write RomFs
var romFsSizes = WriteRomFs(input, metaData);
return(romFsSizes);
}
