/// <summary>
/// Reads a header from a byte buffer.
/// </summary>
/// <param name="header"></param>
/// <returns></returns>
public static GTVolumeHeader FromStream(Span <byte> header)
{
var gtHeader = new GTVolumeHeader();
SpanReader sr = new SpanReader(header, Endian.Big);
byte[] magic = sr.ReadBytes(4);
if (!magic.AsSpan().SequenceEqual(HeaderMagic.AsSpan()) && !magic.AsSpan().SequenceEqual(OldHeaderMagic.AsSpan()))
{
return(null);
}
bool isOld = magic.AsSpan().SequenceEqual(OldHeaderMagic.AsSpan());
if (!isOld)
{
gtHeader.TOCEntryIndex = sr.ReadUInt32();
gtHeader.CompressedTOCSize = sr.ReadUInt32();
gtHeader.TOCSize = sr.ReadUInt32();
gtHeader.PFSVersion = sr.ReadUInt64();
gtHeader.TotalVolumeSize = sr.ReadUInt64();
gtHeader.TitleID = sr.ReadString0();
}
else
{
sr.Position += 4;
gtHeader.TOCEntryIndex = sr.ReadUInt32();
gtHeader.CompressedTOCSize = sr.ReadUInt32();
gtHeader.TOCSize = sr.ReadUInt32();
}
return(gtHeader);
}
/// <summary>
/// Reads a buffer containing the header of a main volume file.
/// </summary>
/// <param name="header"></param>
/// <returns></returns>
private bool ReadHeader(Span <byte> header)
{
GTVolumeHeader volHeader = GTVolumeHeader.FromStream(header);
if (volHeader is null)
{
return(false);
}
Program.Log($"[>] Table of Contents Entry Index: {volHeader.TOCEntryIndex}");
Program.Log($"[>] TOC Size: {volHeader.CompressedTOCSize} bytes ({volHeader.TOCSize} decompressed)");
Program.Log($"[>] Total Volume Size: {MiscUtils.BytesToString((long)volHeader.TotalVolumeSize)}");
Program.Log($"[>] Title ID: '{volHeader.TitleID}'");
VolumeHeader = volHeader;
return(true);
}
/// <summary>
/// Reads a header from a byte buffer.
/// </summary>
/// <param name="header"></param>
/// <returns></returns>
public static GTVolumeHeader FromStream(Span <byte> header)
{
var gtHeader = new GTVolumeHeader();
SpanReader sr = new SpanReader(header, Endian.Big);
byte[] magic = sr.ReadBytes(4);
if (!magic.AsSpan().SequenceEqual(HeaderMagic.AsSpan()))
{
return(null);
}
gtHeader.TOCEntryIndex = sr.ReadUInt32();
gtHeader.CompressedTOCSize = sr.ReadUInt32();
gtHeader.TOCSize = sr.ReadUInt32();
gtHeader.Unk = sr.ReadUInt64();
gtHeader.TotalVolumeSize = sr.ReadUInt64();
gtHeader.TitleID = sr.ReadString0();
return(gtHeader);
}
public GTVolumeTOC(GTVolumeHeader parentHeader, GTVolume parentVolume)
{
ParentHeader = parentHeader;
ParentVolume = parentVolume;
}