public bool CreateNewEntry(EntryData Edata)
{
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
//Set our position so that we can read the entry location
br.BaseStream.Position = m.DownToNearest200(Edata.EntryOffset);
byte[] buffer = br.ReadBytes(0x200);
br.Close();
//Create our binary writer
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(buffer));
//Set our position to where the entry is
long EntryOffset = Edata.EntryOffset - m.DownToNearest200(Edata.EntryOffset);
bw.BaseStream.Position = EntryOffset;
//Write our entry
bw.Write(Edata.FileNameSize);
bw.Write(Edata.Flags);
bw.Write(Encoding.ASCII.GetBytes(Edata.FileName));
bw.BaseStream.Position = EntryOffset + 0x2C;
//Right here, we need to make everything a byte array, as it feels like writing
//everything in little endian for some reason...
byte[] StartingCluster = BitConverter.GetBytes(Edata.StartingCluster);
Array.Reverse(StartingCluster);
bw.Write(StartingCluster);
byte[] Size = BitConverter.GetBytes(Edata.Size);
Array.Reverse(Size);
bw.Write(Size);
//Write out the creation date 6 times
byte[] CreationDate = BitConverter.GetBytes(Edata.CreationDate);
byte[] CreationTime = BitConverter.GetBytes(Edata.CreationTime);
Array.Reverse(CreationDate);
Array.Reverse(CreationTime);
for (int i = 0; i < 3; i++)
{
bw.Write(CreationDate);
bw.Write(CreationTime);
}
//Close our writer
bw.Close();
//Get our IO
bw = ourDrive.GetWriterIO();
bw.BaseStream.Position = m.DownToNearest200(Edata.EntryOffset);
//Write out our buffer
bw.Write(buffer);
return true;
}
private object[] CheckIfBlocksNeeded(Folder f)
{
//Create our object array that will hold our Bool and Entry for if
//we need an open block, and if there's a deleted file
//Create our entry reader so that we can get a return of entries...
Entries e = new Entries(f);
//Get our entries in the last block
EntryData[] eData = e.GetEntries(f.BlocksOccupied[f.BlocksOccupied.Length - 1]);
//Files span upon multiple blocks... Here we go to the last block that it occupies
//(the most recent block created), and check if it has any open entries
//Check for deleted entries
foreach (EntryData E in eData)
{
if (E.FileNameSize == (byte)Info.FileFlags.Deleted)
{
return new object[] { true, E };
}
}
//We didn't find a deleted entry, but we have room in the last block of the folder
//for a new entry
if (eData.Length < 100)
{
EntryData newEntry = new EntryData();
newEntry.EntryOffset = eData[eData.Length - 1].EntryOffset + 0x40;
newEntry.StartingCluster = eData[eData.Length - 1].StartingCluster;
return new object[] { false, newEntry };
}
//We don't have any deleted entries, and don't have enough room in the last block,
//so let's create a new block, add it to the FAT chain, etc.
//Get our new block...
uint nextBlock = new FATStuff(f).GetFreeBlocks(1, f.BlocksOccupied[f.BlocksOccupied.Length - 1], 0, false)[0];
//Write the fat chain
WriteFATChain(new uint[] { f.BlocksOccupied[f.BlocksOccupied.Length - 1], nextBlock}, f);
//Create our new entrydata
EntryData EntryNew = new EntryData();
EntryNew.EntryOffset = m.GetBlockOffset(nextBlock, f);
return new object[] { false, EntryNew };
}
private EntryData GetNewEntryData(Folder root, string Name)
{
if (m.CheckFileName(Name))
{
EntryData EData = new EntryData();
object[] ourObject = CheckIfBlocksNeeded(root);
//If we need to create a new entry...
if (!(bool)ourObject[0])
{
//Create our new entrydata that will serve as the EData for the new folder
Int32 timeStamp = m.FatTimeInt(DateTime.Now);
byte[] ourArray = BitConverter.GetBytes(timeStamp);
byte[] CD = new byte[] { ourArray[2], ourArray[3] };
byte[] CT = new byte[] { ourArray[0], ourArray[1] };
EData.CreationDate = BitConverter.ToUInt16(CD, 0);
EData.CreationTime = BitConverter.ToUInt16(CT, 0);
EData.FileName = Name;
EData.FileNameSize = (byte)Name.Length;
EData.Flags = 0x10;
EData.Size = 0x0;
//Uint for our blocks..
uint[] Blocks = new FATStuff(root).GetFreeBlocks(1, ((EntryData)ourObject[1]).StartingCluster, 0, false);
//Set our starting cluster using the "GetFreeBlocks" method - tell it we need one block, and the starting block is the block of the previous entry
EData.StartingCluster = Blocks[0];
//If we're using a block that we just created (the current block for the parent folder
//has free space
EData.EntryOffset = ((EntryData)ourObject[1]).EntryOffset;
//Create a new folder
Folder f = new Folder(ourDrive, root.PartInfo);
f.EData = EData;
f.BlocksOccupied = Blocks;
CreateNewEntry(EData);
WriteFATChain(f.BlocksOccupied, f);
}
//We are using a deleted entry
else
{
Int32 timeStamp = m.FatTimeInt(DateTime.Now);
byte[] ourArray = BitConverter.GetBytes(timeStamp);
byte[] CD = new byte[] { ourArray[0], ourArray[1] };
Array.Reverse(CD);
byte[] CT = new byte[] { ourArray[2], ourArray[3] };
Array.Reverse(CT);
EData.CreationDate = BitConverter.ToUInt16(CD, 0);
EData.CreationTime = BitConverter.ToUInt16(CT, 0);
EData.FileName = Name;
EData.FileNameSize = (byte)Name.Length;
EData.Flags = 0x10;
EData.Size = 0x0;
EData.StartingCluster = new FATStuff(root).GetFreeBlocks(1, ((EntryData)ourObject[1]).StartingCluster, 0, false)[0];
EData.EntryOffset = ((EntryData)ourObject[1]).EntryOffset;
Folder f = new Folder(ourDrive, root.PartInfo);
f.EData = EData;
CreateNewEntry(EData);
WriteFATChain(f.BlocksOccupied, f);
}
return EData;
}
throw new Exception("File name not valid");
}
/// <summary>
/// Returns EntryData for an entry in a block
/// </summary>
/// <param name="br">The binary reader to use</param>
/// <param name="EntryBlock">The entry in the block to read</param>
/// <param name="Block">The block to read from</param>
internal EntryData GetEData(long originalOffset, FATX_Browser.FATX.IOReader br, uint EntryBlock, uint Block)
{
Misc r = new Misc();
//br.BaseStream.Position = 0x131229000;//(r.GetBlockOffset(Block, Partition, DeviceID)) + (0x40 * EntryBlock);
//Create our return
EntryData data = new EntryData();
//Read our variables
data.EntryOffset = originalOffset + br.BaseStream.Position;
data.FileNameSize = br.ReadByte();
data.Flags = br.ReadByte();
data.FileName = Encoding.ASCII.GetString(br.ReadBytes((int)data.FileNameSize));
//Go to the end of the name to continue reading the variables
br.BaseStream.Position += (0x2A - (int)data.FileNameSize);
data.StartingCluster = r.ReadUInt32(ref br);
data.Size = r.ReadUInt32(ref br);
data.CreationDate = r.ReadUInt16(ref br);
data.CreationTime = r.ReadUInt16(ref br);
data.AccessDate = r.ReadUInt16(ref br);
data.AccessTime = r.ReadUInt16(ref br);
data.ModifiedDate = r.ReadUInt16(ref br);
data.ModifiedTime = r.ReadUInt16(ref br);
//br.BaseStream.Position += 0xC;
br.Close();
return data;
//TODO: Datetime conversion from FAT to DateTime
}
