1  using Ryujinx.Common.Logging;
 2  using System.IO;
 3  
 4  namespace Ryujinx.Graphics.Gpu.Shader.DiskCache
 5  {
 6      /// <summary>
 7      /// Common disk cache utility methods.
 8      /// </summary>
 9      static class DiskCacheCommon
10      {
11          /// <summary>
12          /// Opens a file for read or write.
13          /// </summary>
14          /// <param name="basePath">Base path of the file (should not include the file name)</param>
15          /// <param name="fileName">Name of the file</param>
16          /// <param name="writable">Indicates if the file will be read or written</param>
17          /// <returns>File stream</returns>
18          public static FileStream OpenFile(string basePath, string fileName, bool writable)
19          {
20              string fullPath = Path.Combine(basePath, fileName);
21  
22              FileMode mode;
23              FileAccess access;
24  
25              if (writable)
26              {
27                  mode = FileMode.OpenOrCreate;
28                  access = FileAccess.ReadWrite;
29              }
30              else
31              {
32                  mode = FileMode.Open;
33                  access = FileAccess.Read;
34              }
35  
36              try
37              {
38                  return new FileStream(fullPath, mode, access, FileShare.Read);
39              }
40              catch (IOException ioException)
41              {
42                  Logger.Error?.Print(LogClass.Gpu, $"Could not access file \"{fullPath}\". {ioException.Message}");
43  
44                  throw new DiskCacheLoadException(DiskCacheLoadResult.NoAccess);
45              }
46          }
47  
48          /// <summary>
49          /// Gets the compression algorithm that should be used when writing the disk cache.
50          /// </summary>
51          /// <returns>Compression algorithm</returns>
52          public static CompressionAlgorithm GetCompressionAlgorithm()
53          {
54              return CompressionAlgorithm.Brotli;
55          }
56      }
57  }