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Read Xbox FAT root directory.

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This commit is contained in:
Natalia Portillo
2019-04-07 13:31:27 +01:00
parent 6d43c83712
commit c25d37b3c2
4 changed files with 97 additions and 11 deletions
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46
DiscImageChef.Filesystems/FATX/Super.cs
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@@ -159,11 +159,55 @@ namespace DiscImageChef.Filesystems.FATX
this.partition = partition;
this.imagePlugin = imagePlugin;
firstClusterSector = fatStartSector + fatSize;
bytesPerCluster = sectorsPerCluster * imagePlugin.Info.SectorSize;
DicConsole.DebugWriteLine("Xbox FAT plugin", "sectorsPerCluster = {0}", sectorsPerCluster);
DicConsole.DebugWriteLine("Xbox FAT plugin", "bytesPerCluster = {0}", bytesPerCluster);
DicConsole.DebugWriteLine("Xbox FAT plugin", "firstClusterSector = {0}", firstClusterSector);
throw new NotImplementedException();
uint[] rootDirectoryClusters = GetClusters(superblock.rootDirectoryCluster);
if(rootDirectoryClusters is null) return Errno.InvalidArgument;
byte[] rootDirectoryBuffer = new byte[bytesPerCluster * rootDirectoryClusters.Length];
DicConsole.DebugWriteLine("Xbox FAT plugin", "Reading root directory");
for(int i = 0; i < rootDirectoryClusters.Length; i++)
{
buffer =
imagePlugin.ReadSectors(firstClusterSector + (rootDirectoryClusters[i] - 1) * sectorsPerCluster,
sectorsPerCluster);
Array.Copy(buffer, 0, rootDirectoryBuffer, i * bytesPerCluster, bytesPerCluster);
}
rootDirectory = new Dictionary<string, DirectoryEntry>();
int pos = 0;
while(pos < rootDirectoryBuffer.Length)
{
DirectoryEntry entry = littleEndian
? Marshal
.ByteArrayToStructureLittleEndian<DirectoryEntry
>(rootDirectoryBuffer, pos, Marshal.SizeOf<DirectoryEntry>())
: Marshal.ByteArrayToStructureBigEndian<DirectoryEntry>(rootDirectoryBuffer,
pos,
Marshal
.SizeOf<
DirectoryEntry
>());
pos += Marshal.SizeOf<DirectoryEntry>();
if(entry.filenameSize == UNUSED_DIRENTRY || entry.filenameSize == FINISHED_DIRENTRY) break;
if(entry.filenameSize == DELETED_DIRENTRY || entry.filenameSize > MAX_FILENAME) continue;
string filename = Encoding.GetString(entry.filename, 0, entry.filenameSize);
rootDirectory.Add(filename, entry);
}
return Errno.NoError;
}
public Errno Unmount()