1  using LibHac.Common.Keys;
 2  using LibHac.Fs.Fsa;
 3  using LibHac.Ncm;
 4  using LibHac.Tools.FsSystem.NcaUtils;
 5  using LibHac.Tools.Ncm;
 6  using Ryujinx.HLE.Loaders.Processes.Extensions;
 7  using System;
 8  
 9  namespace Ryujinx.HLE.FileSystem
10  {
11      /// <summary>
12      /// Thin wrapper around <see cref="Cnmt"/>
13      /// </summary>
14      public class ContentMetaData
15      {
16          private readonly IFileSystem _pfs;
17          private readonly Cnmt _cnmt;
18  
19          public ulong Id => _cnmt.TitleId;
20          public TitleVersion Version => _cnmt.TitleVersion;
21          public ContentMetaType Type => _cnmt.Type;
22          public ulong ApplicationId => _cnmt.ApplicationTitleId;
23          public ulong PatchId => _cnmt.PatchTitleId;
24          public TitleVersion RequiredSystemVersion => _cnmt.MinimumSystemVersion;
25          public TitleVersion RequiredApplicationVersion => _cnmt.MinimumApplicationVersion;
26          public byte[] Digest => _cnmt.Hash;
27  
28          public ulong ProgramBaseId => Id & ~0x1FFFUL;
29          public bool IsSystemTitle => _cnmt.Type < ContentMetaType.Application;
30  
31          public ContentMetaData(IFileSystem pfs, Cnmt cnmt)
32          {
33              _pfs = pfs;
34              _cnmt = cnmt;
35          }
36  
37          public Nca GetNcaByType(KeySet keySet, ContentType type, int programIndex = 0)
38          {
39              // TODO: Replace this with a check for IdOffset as soon as LibHac supports it:
40              // && entry.IdOffset == programIndex
41  
42              foreach (var entry in _cnmt.ContentEntries)
43              {
44                  if (entry.Type != type)
45                  {
46                      continue;
47                  }
48  
49                  string ncaId = BitConverter.ToString(entry.NcaId).Replace("-", null).ToLower();
50                  Nca nca = _pfs.GetNca(keySet, $"/{ncaId}.nca");
51  
52                  if (nca.GetProgramIndex() == programIndex)
53                  {
54                      return nca;
55                  }
56              }
57  
58              return null;
59          }
60      }
61  }