private void WriteStrings(Stream output, IList <IArchiveFileInfo> afis)
{
var directories = new HashSet <string>();
var files = new List <string>(afis.Count);
foreach (var file in OrderFiles(afis))
{
directories.Add(file.FilePath.GetDirectory().ToRelative().FullName + "/");
files.Add(file.FilePath.GetName());
}
var strings = new MemoryStream();
using var bw = new BinaryWriterX(strings, true);
foreach (var s in directories)
{
bw.WriteString(s, Encoding.ASCII, false);
}
foreach (var s in files)
{
bw.WriteString(s, Encoding.ASCII, false);
}
var compStrings = new MemoryStream();
XfsaSupport.Compress(strings, compStrings, Level5CompressionMethod.Lz10);
compStrings.CopyTo(output);
while (output.Position % 4 > 0)
{
output.WriteByte(0);
}
}
private void WriteFileTable(Stream output, IList <IArchiveFileInfo> files)
{
var crc16 = Crc16.X25;
var fileEntries = new List <GfsaFileEntry>();
var fileOffset = 0;
foreach (var fileGroup in OrderFiles(files).Cast <GfsaArchiveFileInfo>().GroupBy(x => x.FilePath.GetDirectory().ToRelative() + "/"))
{
var localGroup = fileGroup.Select(file =>
{
var entry = new GfsaFileEntry
{
hash = BinaryPrimitives.ReadUInt16BigEndian(crc16.Compute(Encoding.ASCII.GetBytes(file.FilePath.GetName()))),
Offset = fileOffset,
Size = (int)file.CompressedSize
};
fileOffset += (int)((file.CompressedSize + 3) & ~3);
return(entry);
});
fileEntries.AddRange(localGroup.OrderBy(x => x.hash));
}
XfsaSupport.WriteCompressedTableEntries(output, fileEntries);
while (output.Position % 4 > 0)
{
output.WriteByte(0);
}
}
private void WriteDirectoryTable(Stream output, IList <IArchiveFileInfo> files)
{
var crc16 = Crc16.X25;
var directoryEntries = new List <GfsaDirectoryEntry>();
var fileIndex = 0;
foreach (var group in OrderFiles(files).GroupBy(x => x.FilePath.GetDirectory().ToRelative() + "/"))
{
directoryEntries.Add(new GfsaDirectoryEntry
{
hash = BinaryPrimitives.ReadUInt16BigEndian(crc16.Compute(Encoding.ASCII.GetBytes(group.Key))),
fileIndex = fileIndex,
fileCount = (short)group.Count()
});
fileIndex += directoryEntries.Last().fileCount;
}
XfsaSupport.WriteCompressedTableEntries(output, directoryEntries.OrderBy(x => x.hash));
while (output.Position % 4 > 0)
{
output.WriteByte(0);
}
}
public void Save(Stream output, IList <IArchiveFileInfo> files, IProgressContext progress)
{
// Group files by directory
var castedFiles = files.Cast <XfsaArchiveFileInfo <Xfsa2FileEntry> >();
// Build directory, file, and name tables
BuildTables(castedFiles, out var directoryEntries, out var directoryHashes, out var fileEntries, out var nameStream);
// -- Write file --
using var bw = new BinaryWriterX(output);
bw.BaseStream.Position = _headerSize;
// Write directory entries
_header.directoryEntriesCount = (short)directoryEntries.Count;
_header.directoryEntriesOffset = _headerSize;
XfsaSupport.WriteCompressedTableEntries(bw.BaseStream, directoryEntries);
bw.WriteAlignment(4);
// Write directory hashes
_header.directoryHashCount = (short)directoryHashes.Count;
_header.directoryHashOffset = (int)bw.BaseStream.Position;
XfsaSupport.WriteCompressedTableEntries(bw.BaseStream, directoryHashes);
bw.WriteAlignment(4);
// Write file entry hashes
_header.fileEntriesCount = fileEntries.Count;
_header.fileEntriesOffset = (int)bw.BaseStream.Position;
XfsaSupport.WriteCompressedTableEntries(bw.BaseStream, fileEntries.Select(x => x.Entry));
bw.WriteAlignment(4);
// Write name table
_header.nameOffset = (int)bw.BaseStream.Position;
var nameStreamComp = new MemoryStream();
XfsaSupport.Compress(nameStream, nameStreamComp, Level5CompressionMethod.Lz10);
nameStreamComp.CopyTo(bw.BaseStream);
bw.WriteAlignment(4);
// Write file data
_header.dataOffset = (int)bw.BaseStream.Position;
foreach (var fileEntry in fileEntries)
{
bw.BaseStream.Position = _header.dataOffset + fileEntry.Entry.FileOffset;
fileEntry.SaveFileData(bw.BaseStream, null);
}
// Write header
bw.BaseStream.Position = 0;
bw.WriteType(_header);
}
public IList <IArchiveFileInfo> Load(Stream input)
{
using var br = new BinaryReaderX(input, true);
// Header
_header = br.ReadType <XfsaHeader>();
// Read directory entries
var directoryEntries = XfsaSupport.ReadCompressedTableEntries <Xfsa1DirectoryEntry>(input,
_header.directoryEntriesOffset, _header.directoryHashOffset - _header.directoryEntriesOffset,
_header.directoryEntriesCount);
// Read directory hashes
var directoryHashes = XfsaSupport.ReadCompressedTableEntries <uint>(input,
_header.directoryHashOffset, _header.fileEntriesOffset - _header.directoryHashOffset,
_header.directoryHashCount);
// Read file entry table
var entries = XfsaSupport.ReadCompressedTableEntries <Xfsa1FileEntry>(input,
_header.fileEntriesOffset, _header.nameOffset - _header.fileEntriesOffset,
_header.fileEntriesCount);
// Read nameTable
var nameComp = new SubStream(input, _header.nameOffset, _header.dataOffset - _header.nameOffset);
var nameStream = new MemoryStream();
Level5Compressor.Decompress(nameComp, nameStream);
// Add Files
var names = new BinaryReaderX(nameStream);
var result = new List <IArchiveFileInfo>();
foreach (var directory in directoryEntries)
{
names.BaseStream.Position = directory.DirectoryNameOffset;
var directoryName = names.ReadCStringSJIS();
var filesInDirectory = entries.Skip(directory.firstFileIndex).Take(directory.FileCount);
foreach (var file in filesInDirectory)
{
var fileStream = new SubStream(input, _header.dataOffset + file.FileOffset, file.FileSize);
names.BaseStream.Position = directory.FileNameStartOffset + file.NameOffset;
var fileName = names.ReadCStringSJIS();
result.Add(new XfsaArchiveFileInfo <Xfsa1FileEntry>(fileStream, directoryName + fileName, file)
{
PluginIds = XfsaSupport.RetrievePluginMapping(fileStream, fileName)
});
}
}
return(result);
}
public IList <IArchiveFileInfo> Load(Stream input)
{
using var br = new BinaryReaderX(input, true);
// Read header
_header = br.ReadType <GfsaHeader>();
// Read tables
var directoryEntries = XfsaSupport.ReadCompressedTableEntries <GfsaDirectoryEntry>(input,
_header.directoryOffset, _header.fileOffset - _header.directoryOffset,
_header.directoryCount);
var fileEntries = XfsaSupport.ReadCompressedTableEntries <GfsaFileEntry>(input,
_header.fileOffset, _header.unkOffset - _header.fileOffset,
_header.fileCount);
input.Position = _header.unkOffset;
_unkTable = br.ReadBytes(_header.stringOffset - _header.unkOffset);
// Read strings
var nameComp = new SubStream(input, _header.stringOffset, _header.fileDataOffset - _header.stringOffset);
var nameStream = new MemoryStream();
Level5Compressor.Decompress(nameComp, nameStream);
var(directories, files) = ReadStrings(nameStream);
// Add files
var result = new List <IArchiveFileInfo>();
foreach (var dirEntry in directoryEntries)
{
var dirName = directories.FirstOrDefault(x => x.Hash == dirEntry.hash)?.Value;
for (var fileIndex = dirEntry.fileIndex; fileIndex < dirEntry.fileIndex + dirEntry.fileCount; fileIndex++)
{
var fileEntry = fileEntries[fileIndex];
var fileName = files.Skip(dirEntry.fileIndex).Take(dirEntry.fileCount).FirstOrDefault(x => x.Hash == fileEntry.hash)?.Value;
var fileData = new SubStream(input, _header.fileDataOffset + fileEntry.Offset, fileEntry.Size);
result.Add(CreateAfi(fileData, Path.Combine(dirName, fileName), fileEntry));
}
}
return(result);
}
