/// <summary>
///
/// </summary>
/// <param name="volume"></param>
/// <param name="sector"></param>
/// <returns></returns>
public static FileAllocationTableEntry Get(string volume, int sector)
{
FatVolumeBootRecord vbr = VolumeBootRecord.Get(volume) as FatVolumeBootRecord;
byte[] bytes = FileAllocationTable.GetBytes(volume, vbr);
int endSector = 0;
switch (vbr.FatType)
{
case "FAT12":
endSector = parseFat12(bytes, sector);
break;
case "FAT16":
endSector = parseFat16(bytes, sector);
break;
case "FAT32":
endSector = parseFat32(bytes, sector);
break;
}
return(new FileAllocationTableEntry(sector, endSector));
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public byte[] GetContent()
{
FatVolumeBootRecord vbr = VolumeBootRecord.Get(this.Volume) as FatVolumeBootRecord;
int RootDirSectors = ((vbr.BPB_RootEntryCount * 32) + (vbr.BytesPerSector - 1)) / vbr.BytesPerSector;
uint FirstDataSector = (uint)(vbr.ReservedSectors + (vbr.BPB_NumberOfFATs * vbr.BPB_FatSize) + RootDirSectors);
uint FirstSectorofCluster = ((this.FirstCluster - 2) * vbr.SectorsPerCluster) + FirstDataSector;
byte[] bytes = DD.Get(this.Volume, (long)FirstSectorofCluster * (long)vbr.BytesPerSector, vbr.BytesPerSector, 1);
if (this.Directory)
{
return(bytes);
}
else
{
if (this.FileSize <= bytes.Length)
{
return(Helper.GetSubArray(bytes, 0, this.FileSize));
}
else
{
List <byte> byteList = new List <byte>();
int[] clusters = FileAllocationTable.GetFatEntry(this.Volume, (int)this.FirstCluster);
foreach (int cluster in clusters)
{
long targetCluster = ((cluster - 2) * vbr.SectorsPerCluster) + FirstDataSector;
byteList.AddRange(DD.Get(this.Volume, targetCluster * vbr.BytesPerSector, vbr.BytesPerSector, 1));
}
return(Helper.GetSubArray(byteList.ToArray(), 0, this.FileSize));
}
}
}
