1  using Ryujinx.HLE.Exceptions;
 2  using System.IO;
 3  
 4  namespace Ryujinx.HLE.Loaders.Npdm
 5  {
 6      public class Aci0
 7      {
 8          private const int Aci0Magic = 'A' << 0 | 'C' << 8 | 'I' << 16 | '0' << 24;
 9  
10          public ulong TitleId { get; set; }
11  
12          public int FsVersion { get; private set; }
13          public ulong FsPermissionsBitmask { get; private set; }
14  
15          public ServiceAccessControl ServiceAccessControl { get; private set; }
16          public KernelAccessControl KernelAccessControl { get; private set; }
17  
18          /// <exception cref="InvalidNpdmException">The stream doesn't contain valid ACI0 data.</exception>
19          /// <exception cref="System.ArgumentException">The stream does not support reading, is <see langword="null"/>, or is already closed.</exception>
20          /// <exception cref="EndOfStreamException">The end of the stream is reached.</exception>
21          /// <exception cref="System.ObjectDisposedException">The stream is closed.</exception>
22          /// <exception cref="IOException">An I/O error occurred.</exception>
23          /// <exception cref="System.NotImplementedException">The FsAccessHeader.ContentOwnerId section is not implemented.</exception>
24          public Aci0(Stream stream, int offset)
25          {
26              stream.Seek(offset, SeekOrigin.Begin);
27  
28              BinaryReader reader = new(stream);
29  
30              if (reader.ReadInt32() != Aci0Magic)
31              {
32                  throw new InvalidNpdmException("ACI0 Stream doesn't contain ACI0 section!");
33              }
34  
35              stream.Seek(0xc, SeekOrigin.Current);
36  
37              TitleId = reader.ReadUInt64();
38  
39              // Reserved.
40              stream.Seek(8, SeekOrigin.Current);
41  
42              int fsAccessHeaderOffset = reader.ReadInt32();
43              int fsAccessHeaderSize = reader.ReadInt32();
44              int serviceAccessControlOffset = reader.ReadInt32();
45              int serviceAccessControlSize = reader.ReadInt32();
46              int kernelAccessControlOffset = reader.ReadInt32();
47              int kernelAccessControlSize = reader.ReadInt32();
48  
49              FsAccessHeader fsAccessHeader = new(stream, offset + fsAccessHeaderOffset, fsAccessHeaderSize);
50  
51              FsVersion = fsAccessHeader.Version;
52              FsPermissionsBitmask = fsAccessHeader.PermissionsBitmask;
53  
54              ServiceAccessControl = new ServiceAccessControl(stream, offset + serviceAccessControlOffset, serviceAccessControlSize);
55  
56              KernelAccessControl = new KernelAccessControl(stream, offset + kernelAccessControlOffset, kernelAccessControlSize);
57          }
58      }
59  }