/// <inheritdoc />
public void Copy(string fileNameFrom, string fileNameTo)
{
var sourceFileDescriptor = _entryDescriptorRepository.Find(fileNameFrom).Value;
var sourceDataCursor = new Cursor(sourceFileDescriptor.DataOffset, SeekOrigin.Begin);
var destinationParentName = fileNameTo.GetParentFullName();
var destinationParentDescriptor = _entryDescriptorRepository.Find(destinationParentName).Value;
var destinationPlaceholder = new PlaceholderFileEntry(fileNameTo, destinationParentDescriptor.Id, sourceFileDescriptor.DataLength);
// Create empty file of given size with no data
CreateInternal(destinationPlaceholder, destinationDataCursor =>
{
// Copy data from source file data origin to destination
_connection.PerformCopy(sourceDataCursor, destinationDataCursor, sourceFileDescriptor.DataLength);
});
}
/// <inheritdoc/>
public DirectoryEntry Find(string fullPath)
{
var descriptor = _entryDescriptorRepository.Find(fullPath);
return(new DirectoryEntry(
descriptor.Value.Id,
descriptor.Value.Name,
descriptor.Value.ParentId));
}
/// <inheritdoc />
public void Delete(string entryName)
{
// 1. Find last descriptor
var filesystemDescriptor = _filesystemDescriptorAccessor.Value;
var lastDescriptorCursor = new Cursor(
-FilesystemDescriptor.BytesTotal -
(filesystemDescriptor.EntryDescriptorsCount *
filesystemDescriptor.EntryDescriptorLength),
SeekOrigin.End);
var lastDescriptor = _entryDescriptorRepository.Read(lastDescriptorCursor).Value;
// 2. Find current descriptor
var descriptorItem = _entryDescriptorRepository.Find(entryName);
var cursor = descriptorItem.Cursor;
// 3. Save last descriptor in new empty space (perform swap with last)
_entryDescriptorRepository.Write(new StorageItem <EntryDescriptor>(lastDescriptor, cursor));
// 4. Decrease count of descriptors
IncreaseEntriesCount(-1);
}