public NcchRomFs(Stream instream)
{
using var br = new BinaryReaderX(instream, true);
// Read header
var romFsOffset = br.BaseStream.Position;
header = br.ReadType <NcchRomFsHeader>();
masterHash = br.ReadBytes(header.masterHashSize);
// Read Level 3
lv3Offset = romFsOffset + 0x1000;
br.BaseStream.Position = lv3Offset;
lv3Header = br.ReadType <NcchRomFsLevelHeader>();
// Resolve file and directory tree
br.BaseStream.Position = lv3Offset + lv3Header.dirMetaTableOffset;
Files = new List <FinalFileInfo>();
ResolveDirectories(br);
}
/// <summary>
/// Write meta data tree.
/// </summary>
/// <param name="output">The stream to write to.</param>
/// <param name="metaData">The meta data tree to write.</param>
/// <returns>The size of the written meta data.</returns>
private static long WriteMetaData(Stream output, MetaData metaData)
{
var startPosition = output.Position;
using var bw = new BinaryWriterX(output, true);
var header = new NcchRomFsLevelHeader
{
headerLength = 0x28,
dirHashTableOffset = 0x28,
dirHashTableSize = metaData.DirHashTable.Length * sizeof(uint),
dirMetaTableSize = metaData.Dirs.Sum(dir => dir.GetSize(4)),
fileHashTableSize = metaData.FileHashTable.Length * sizeof(uint),
fileMetaTableSize = metaData.Files.Sum(file => file.GetSize(4)),
};
bw.BaseStream.Position = startPosition + 0x28;
// Write directory hash table
foreach (var hash in metaData.DirHashTable)
{
bw.Write(hash);
}
// Write directory entries
header.dirMetaTableOffset = (int)(bw.BaseStream.Position - startPosition);
foreach (var dir in metaData.Dirs)
{
bw.Write(dir.ParentOffset);
bw.Write(dir.NextSiblingOffset);
bw.Write(dir.FirstChildOffset);
bw.Write(dir.FirstFileOffset);
bw.Write(dir.NextDirInSameBucket ?? UnusedEntry_);
bw.Write(Encoding.Unicode.GetByteCount(dir.Name));
bw.Write(Encoding.Unicode.GetBytes(dir.Name));
bw.WriteAlignment(4);
}
// Write file hash table
header.fileHashTableOffset = (int)(bw.BaseStream.Position - startPosition);
foreach (var hash in metaData.FileHashTable)
{
bw.Write(hash);
}
// Write file entries
header.fileMetaTableOffset = (int)(bw.BaseStream.Position - startPosition);
foreach (var file in metaData.Files)
{
bw.Write(file.ParentDirOffset);
bw.Write(file.NextSiblingOffset);
bw.Write(file.DataOffset);
bw.Write(file.DataSize);
bw.Write(file.NextFileInSameBucket ?? UnusedEntry_);
bw.Write(Encoding.Unicode.GetByteCount(file.Name));
bw.Write(Encoding.Unicode.GetBytes(file.Name));
bw.WriteAlignment(4);
}
// Write files
header.fileDataOffset = (int)((bw.BaseStream.Position - startPosition + 0xF) & ~0xF);
foreach (var file in metaData.Files)
{
bw.WriteAlignment();
file.FileData.CopyTo(bw.BaseStream);
}
var level3Size = bw.BaseStream.Position - startPosition;
bw.WriteAlignment(BlockSize_);
bw.BaseStream.Position = startPosition;
bw.WriteType(header);
return(level3Size);
}
