aaru-dps/Aaru
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.git synced 2025-12-16 19:24:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Retrieve clusters in FAT16 and FAT32.

Browse Source
This commit is contained in:
Natalia Portillo
2019-04-26 19:56:58 +01:00
parent 4d28330dcb
commit 35de82ec9f
2 changed files with 63 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
DiscImageChef.Filesystems/FAT/File.cs
View File

@@ -31,6 +31,7 @@
// ****************************************************************************/
using System;
using System.Collections.Generic;
using DiscImageChef.CommonTypes.Structs;
namespace DiscImageChef.Filesystems.FAT
@@ -67,5 +68,57 @@ namespace DiscImageChef.Filesystems.FAT
throw new NotImplementedException();
}
uint[] GetClusters(uint startCluster)
{
if(startCluster == 0) return null;
if(startCluster >= XmlFsType.Clusters) return null;
List<uint> clusters = new List<uint>();
uint nextCluster = startCluster;
if(fat12) return null;
ulong nextSector = nextCluster / fatEntriesPerSector + fatFirstSector;
int nextEntry = (int)(nextCluster % fatEntriesPerSector);
ulong currentSector = nextSector;
byte[] fatData = image.ReadSector(currentSector);
if(fat32)
while((nextCluster & FAT32_MASK) > 0 && (nextCluster & FAT32_MASK) <= FAT32_BAD)
{
clusters.Add(nextCluster);
if(currentSector != nextSector)
{
fatData = image.ReadSector(nextSector);
currentSector = nextSector;
}
nextCluster = BitConverter.ToUInt32(fatData, nextEntry * 4);
nextSector = nextCluster / fatEntriesPerSector + fatFirstSector;
nextEntry = (int)(nextCluster % fatEntriesPerSector);
}
else if(fat16)
while(nextCluster > 0 && nextCluster <= FAT16_BAD)
{
clusters.Add(nextCluster);
if(currentSector != nextSector)
{
fatData = image.ReadSector(nextSector);
currentSector = nextSector;
}
nextCluster = BitConverter.ToUInt16(fatData, nextEntry * 2);
nextSector = nextCluster / fatEntriesPerSector + fatFirstSector;
nextEntry = (int)(nextCluster % fatEntriesPerSector);
}
return clusters.ToArray();
}
}
}