public IList <IArchiveFileInfo> Load(Stream input)
{
using var br = new BinaryReaderX(input, true);
// Read CPK header table
_header = CpkTable.Create(input, 0);
var headerRow = _header.Rows[0];
_align = headerRow.Get <int>("Align");
// Retrieve the offsets for the other tables.
var contentOffset = headerRow.Get <long>("ContentOffset");
var tocOffset = headerRow.Get <long>("TocOffset");
var itocOffset = headerRow.Get <long>("ItocOffset");
var etocOffset = headerRow.Get <long>("EtocOffset");
// Read tables
if (etocOffset > 0)
{
ReadEtocTable(br, etocOffset);
}
if (tocOffset > 0)
{
return(ReadTocTable(br, tocOffset, contentOffset).ToList());
}
if (itocOffset > 0)
{
return(ReadItocTable(br, itocOffset).ToList());
}
return(Array.Empty <IArchiveFileInfo>());
}
private IEnumerable <IArchiveFileInfo> ReadTocTable(BinaryReaderX br, long tocOffset, long contentOffset)
{
// Read toc table
_tocTable = CpkTable.Create(br.BaseStream, tocOffset);
// Determine file offset
var fileOffset = tocOffset;
if (contentOffset >= 0)
{
fileOffset = tocOffset < 0 ? contentOffset : Math.Min(contentOffset, tocOffset);
}
// Populate files
foreach (var row in _tocTable.Rows)
{
var dir = row.Get <string>("DirName");
var name = row.Get <string>("FileName");
var offset = fileOffset + row.Get <long>("FileOffset");
var compSize = row.Get <int>("FileSize");
var decompSize = row.Get <int>("ExtractSize");
var subStream = new SubStream(br.BaseStream, offset, compSize);
if (compSize == decompSize)
{
yield return(new CpkArchiveFileInfo(subStream, UPath.Combine(dir, name).FullName, row));
}
else
{
yield return(new CpkArchiveFileInfo(subStream, UPath.Combine(dir, name).FullName, row, Kompression.Implementations.Compressions.Crilayla, decompSize));
}
}
}
private IEnumerable <IArchiveFileInfo> ReadItocTable(BinaryReaderX br, long itocOffset)
{
// Read toc table
_itocTable = CpkTable.Create(br.BaseStream, itocOffset);
// Read data tables
var itocRow = _itocTable.Rows[0];
_dataLTable = CpkTable.Create(new MemoryStream(itocRow.Get <byte[]>("DataL")), "DataL");
_dataHTable = CpkTable.Create(new MemoryStream(itocRow.Get <byte[]>("DataH")), "DataH");
var fileOffset = _header.Rows[0].Get <long>("ContentOffset");
// Populate files
foreach (var row in _dataLTable.Rows.Concat(_dataHTable.Rows).OrderBy(x => x.Get <long>("ID")))
{
var id = row.Get <long>("ID");
var compSize = row.Get <int>("FileSize");
var decompSize = row.Get <int>("ExtractSize");
var subStream = new SubStream(br.BaseStream, fileOffset, compSize);
if (compSize == decompSize)
{
yield return(new CpkArchiveFileInfo(subStream, $"{id:00000}.bin", row));
}
else
{
yield return(new CpkArchiveFileInfo(subStream, $"{id:00000}.bin", row, Kompression.Implementations.Compressions.Crilayla, decompSize));
}
fileOffset = (fileOffset + compSize + (_align - 1)) & ~(_align - 1);
}
}
private void ReadGtocTable(BinaryReaderX br, long gtocOffset)
{
_gtocTable = CpkTable.Create(br.BaseStream, gtocOffset);
}
private void ReadEtocTable(BinaryReaderX br, long etocOffset)
{
_etocTable = CpkTable.Create(br.BaseStream, etocOffset);
}