public bool ClearFATChain(uint[] Blocks, Entry e)
{
for (int i = 0; i < Blocks.Length; i++)
{
//Open our binary reader to read our buffer
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
//Get the position we should be at for our buffer
long BufferOffset = m.DownToNearest200(m.BlockToFATOffset(Blocks[i], e));
//Set our position to the buffer offset
br.BaseStream.Position = BufferOffset;
//Read our buffer
byte[] Buffer = br.ReadBytes(0x200);
//Close our reader -- we don't need it any more
br.Close();
//Open our binary writer in to a memory stream
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(Buffer));
//Set our position in the buffer to where the actual block is
bw.BaseStream.Position = m.BlockToFATOffset(Blocks[i], e) - BufferOffset;
//Write out free block
if (e.PartInfo.EntrySize == Info.PartitionBit.FATX16)
{
bw.Write(new byte[] { 0x00, 0x00 });
}
else
{
bw.Write(new byte[] { 0x00, 0x00 });
}
//Close our binary writer
bw.Close();
//Check to see if we can write out more blocks from within the buffer, so we
//don't have to re-read what we already have
i += CheckWriteBuffDel(ref Buffer, BufferOffset, Blocks, i + 1, e);
//Re-open our binary writer, on the drive
bw = ourDrive.GetWriterIO();
//Set the position
bw.BaseStream.Position = BufferOffset;
//Write out the buffer
bw.Write(Buffer);
bw.Close();
}
return true;
}
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 bool WriteFATChain(uint[] blocksOccupied, Entry e)
{
//Foreach block in our blocks occupied
for (int i = 0; i < blocksOccupied.Length; i++)
{
//Get the value of the block
uint block = blocksOccupied[i];
//Create our byte array for our pointer to the next block
byte[] Bytes = new byte[0];
//If we have reached the last block in the array...
if (i == blocksOccupied.Length - 1)
{
//We need to write out that it's the last block, so we do so by writing 0xFF (in accordance to entry size)
if (e.PartInfo.EntrySize == Info.PartitionBit.FATX16)
{
//EOB (end of blocks) for FATX16...
Bytes = new byte[] { 0xFF, 0xFF };
}
else
{
//EOB for FATX32
Bytes = new byte[] { 0xFF, 0xFF, 0xFF, 0xFF };
}
}
//We have not reached the end block
else
{
Bytes = BitConverter.GetBytes(blocksOccupied[i + 1]);
//Reverse the array so that it will be big endian
Array.Reverse(Bytes);
}
#region Bascially the WriteBlock Function, modified to check for the next block within the same buffer
//Write out our next block's byte array at the block's position in the FAT
//Create our binary reader
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
//Set our position to the block offset in the FAT
br.BaseStream.Position = m.DownToNearest200(m.BlockToFATOffset(block, e));
//Get our position in the buffer
long OffsetInBuffer = m.BlockToFATOffset(block, e) - br.BaseStream.Position;
//Read our buffer
byte[] buffer = br.ReadBytes(0x200);
//Close our binary reader - we're done with it for the drive for now
br.Close();
//Create our binary writer for writing to the buffer
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(buffer));
//Set our position
bw.BaseStream.Position = OffsetInBuffer;
//Write our block
bw.Write(Bytes);
bw.Close();
if (!m.EOF(Bytes, false))
{
i += CheckWriteBuff(ref buffer, m.DownToNearest200(m.BlockToFATOffset(block, e)), blocksOccupied, i + 1, e);
}
//Re-open our binary writer in the drive
bw = ourDrive.GetWriterIO();
//Set our position
bw.BaseStream.Position = m.DownToNearest200(m.BlockToFATOffset(block, e));
//Write our buffer
bw.Write(buffer);
#endregion
}
return true;
}
///We need to make the writing of the blocks and shit little endian so that it will
///write it in big endian. what the f**k.
//For some reason is the function that writes a FAT chain
private bool WriteBlock(uint ui, byte[] value, Entry e)
{
//Create our binary reader
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
//Set our position to the block offset in the FAT
br.BaseStream.Position = m.DownToNearest200(m.BlockToFATOffset(ui, e));
//Get our position in the buffer
long OffsetInBuffer = m.BlockToFATOffset(ui, e) - br.BaseStream.Position;
//Read our buffer
byte[] buffer = br.ReadBytes(0x200);
//Close our binary reader - we're done with it for the drive for now
br.Close();
//Create our binary writer for writing to the buffer
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(buffer));
//Set our position
bw.BaseStream.Position = OffsetInBuffer;
//Write our block
bw.Write(value);
bw.Close();
//Re-open our binary writer in the drive
bw = ourDrive.GetWriterIO();
//Set our position
bw.BaseStream.Position = m.DownToNearest200(m.BlockToFATOffset(ui, e));
//Write our buffer
bw.Write(buffer);
return true;
}
private bool Rename(long entryOffset, string newName)
{
if (m.CheckFileName(newName))
{
//Create our binary reader/writer
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
//Round our offset down to the nearest 0x200 boundary so we can read
//the entry
//Set our reader to do the same thing
br.BaseStream.Position = m.DownToNearest200(entryOffset);
//Split the difference so we can see how far in to our buffer
//we need to be
long offsetInBuffer = entryOffset - (m.DownToNearest200(entryOffset));
//Create our buffer
byte[] buffer = br.ReadBytes(0x200);
//Close our reader - we don't need it any more
br.Close();
//Create a new binary reader that reads the buffer in memory
FATX_Browser.FATX.IOWriter memWriter = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(buffer));
//Set our position to the entry position
memWriter.BaseStream.Position = offsetInBuffer;
//Write the file name size
memWriter.Write((byte)newName.Length);
//Jump forward one byte and clear the old name
memWriter.BaseStream.Position++;
for (int i = 0; i < 0x2A; i++)
{
memWriter.Write((byte)0xFF);
}
//Go back to where the file name is
memWriter.BaseStream.Position = offsetInBuffer + 0x2;
//Write the new name
memWriter.Write((byte[])Encoding.ASCII.GetBytes(newName));
memWriter.Close();
//Open / set our writer's stuff
FATX_Browser.FATX.IOWriter bw = ourDrive.GetWriterIO();
bw.BaseStream.Position = m.DownToNearest200(entryOffset);
//Write our edited buffer to the drive
bw.Write((byte[])buffer);
bw.Close();
return true;
}
else
{
throw new Exception("File name not valid");
}
}
private bool MarkEntryAsDeleted(Entry e)
{
FATX_Browser.FATX.IOReader br = ourDrive.GetIO();
long position = m.DownToNearest200(e.EntryOffset);
//Get our offset in our buffer
long OffsetInBuffer = e.EntryOffset - position;
br.BaseStream.Position = position;
//Read our buffer
byte[] buffer = br.ReadBytes(0x200);
//Close our binary reader - not needed now
br.Close();
//Create our binary writer
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(buffer));
//Seek to the position in the buffer
bw.BaseStream.Position = OffsetInBuffer;
//Write the flag
bw.Write((byte)Info.FileFlags.Deleted);
//Close our binary writer
bw.Close();
//Re-open our binary writer for the drive
bw = ourDrive.GetWriterIO();
//Set our position
bw.BaseStream.Position = m.DownToNearest200(e.EntryOffset);
//Write out our buffer
bw.Write(buffer);
return true;
}
private int CheckWriteBuffDel(ref byte[] Buffer, long BufferOffset, uint[] allBlocks, int index, Entry e)
{
//This will be our return value so that we can tell our other function how
//many blocks were written
int blocksWritten = 0;
//If the offset for the next block's buffer is the same as our current buffer's offset
if (m.DownToNearest200(m.BlockToFATOffset(allBlocks[index], e)) == BufferOffset)
{
//Get our offset in our buffer for the block we're writing to
long OffsetinBuffer = m.BlockToFATOffset(allBlocks[index], e) - BufferOffset;
//Create our binary writer
FATX_Browser.FATX.IOWriter bw = new FATX_Browser.FATX.IOWriter(new System.IO.MemoryStream(Buffer));
//Go to the offset in the buffer
bw.BaseStream.Position = OffsetinBuffer;
//Create our byte array (we do new byte[1] just as a placeholder)
byte[] BlocktoWrite = new byte[1];
//If we're on a 2-byte block entry
if (e.PartInfo.EntrySize == Info.PartitionBit.FATX16)
{
//Our block to write is the ending block
BlocktoWrite = new byte[] { 0x00, 0x00 };
}
else
{
//Our block to write is the ending block
BlocktoWrite = new byte[] { 0x00, 0x00, 0x00, 0x00 };
}
//Write out our array
bw.Write(BlocktoWrite);
//Close our writer
bw.Close();
//If we didn't just write the last block...
if (index != allBlocks.Length - 1)
{
//Repeat
blocksWritten += CheckWriteBuff(ref Buffer, BufferOffset, allBlocks, index + blocksWritten, e);
}
}
return blocksWritten;
}