private void RemoveFile(FileEntry parent, FileEntry fileEntry)
{
var block = fileEntry.StartingBlockNum;
for (var i = 0; i < fileEntry.BlocksForFile; i++)
{
var he = GetHashEntry(block);
he.Status = BlockStatus.PreviouslyAllocated;
if (UnallocatedHashEntries.Contains(block))
{
throw new Exception("qwe");
}
UnallocatedHashEntries.Add(block);
block = he.NextBlock;
}
fileEntry.BlocksForFile = 0;
fileEntry.Name = string.Empty;
parent.Files.Remove(fileEntry);
}
public void ReplaceFile(FileEntry fileEntry, byte[] content)
{
if (fileEntry.IsDirectory)
{
throw new NotSupportedException("Directories doesn't have content!");
}
var remaining = content.Length;
var allocatedBlockCount = fileEntry.BlocksForFile;
var newBlockCount = (content.Length + 0xFFF) / 0x1000;
var blocks = AllocateBlocks(newBlockCount - allocatedBlockCount);
var block = fileEntry.StartingBlockNum;
if (allocatedBlockCount == 0)
{
block = blocks[0];
fileEntry.StartingBlockNum = blocks[0];
}
var consecutive = true;
for (var i = 0; i < newBlockCount; i++)
{
var pos = GetRealAddressOfBlock(block);
var size = remaining > 0x1000 ? 0x1000 : remaining;
remaining -= size;
var buffer = new byte[0x1000];
Buffer.BlockCopy(content, i * 0x1000, buffer, 0, size);
Binary.WriteBytes(pos, buffer, 0, 0x1000);
var he = GetHashEntry(block);
if (i < allocatedBlockCount - 1)
{
he.Status = BlockStatus.Allocated;
if (he.NextBlock != block + 1)
{
consecutive = false;
}
block = he.NextBlock;
}
else if (i < newBlockCount - 1)
{
he.Status = BlockStatus.NewlyAllocated;
block = blocks[i - allocatedBlockCount + 1];
he.NextBlock = block;
if (he.NextBlock != he.Block + 1)
{
consecutive = false;
}
}
else
{
he.Status = BlockStatus.NewlyAllocated;
he.NextBlock = 0xFFFFFF;
}
}
for (var i = newBlockCount; i < allocatedBlockCount; i++)
{
var he = GetHashEntry(block);
if (UnallocatedHashEntries.Contains(block))
{
throw new Exception("qwe");
}
UnallocatedHashEntries.Add(block);
he.Status = BlockStatus.PreviouslyAllocated;
block = he.NextBlock;
he.NextBlock = 0xFFFFFF;
}
fileEntry.FileSize = content.Length;
fileEntry.BlocksForFile = newBlockCount;
fileEntry.BlocksForFileCopy = newBlockCount;
fileEntry.BlocksAreConsecutive = consecutive;
}