internal ExFatFilesystemEntry(DataDescriptor parentDataDescriptor, ExFatMetaDirectoryEntry metaEntry = null, DataDescriptor dataDescriptorOverride = null, ExFatFileAttributes?attributesOverride = null)
{
_dataDescriptorOverride = dataDescriptorOverride;
ParentDataDescriptor = parentDataDescriptor;
MetaEntry = metaEntry;
_attributesOverride = attributesOverride;
}
/// <summary>
/// Adds the entry to directory (given by <see cref="DataDescriptor" />).
/// </summary>
/// <param name="dataDescriptor">The data descriptor.</param>
/// <param name="metaEntry">The meta entry.</param>
/// <returns>A <see cref="DataDescriptor"/> describing directory after append</returns>
public void UpdateEntry(DataDescriptor dataDescriptor, ExFatMetaDirectoryEntry metaEntry)
{
lock (_directoryLock)
{
using (var directoryStream = OpenDataStream(dataDescriptor, FileAccess.ReadWrite))
{
directoryStream.Seek(metaEntry.Primary.DirectoryPosition, SeekOrigin.Begin);
metaEntry.Write(directoryStream);
}
}
}
/// <summary>
/// Adds the entry to directory (given by <see cref="DataDescriptor" />.
/// </summary>
/// <param name="targetDirectoryDataDescriptor">The data descriptor.</param>
/// <param name="metaEntry">The meta entry.</param>
/// <returns>A <see cref="DataDescriptor"/> describing directory after append</returns>
public DataDescriptor AddEntry(DataDescriptor targetDirectoryDataDescriptor, ExFatMetaDirectoryEntry metaEntry)
{
var r = targetDirectoryDataDescriptor;
lock (_directoryLock)
{
using (var directoryStream = OpenDataStream(targetDirectoryDataDescriptor, FileAccess.ReadWrite, d => r = d))
{
var availableSlot = FindAvailableSlot(directoryStream, metaEntry.Entries.Count);
directoryStream.Seek(availableSlot, SeekOrigin.Begin);
foreach (var entry in metaEntry.Entries)
{
entry.EntryType.Value |= ExFatDirectoryEntryType.InUse;
}
metaEntry.Write(directoryStream);
}
}
return(r);
}
/// <summary>
/// Creates a <see cref="ExFatFilesystemEntry" />.
/// </summary>
/// <param name="parent">The parent.</param>
/// <param name="name">The name.</param>
/// <param name="attributes">The attributes.</param>
/// <returns></returns>
private ExFatFilesystemEntry CreateEntry(ExFatFilesystemEntry parent, string name, FileAttributes attributes)
{
var now = DateTimeOffset.Now;
var entries = new List <ExFatDirectoryEntry>
{
new FileExFatDirectoryEntry(new Buffer(new byte[32]))
{
EntryType = { Value = ExFatDirectoryEntryType.File },
FileAttributes = { Value = (ExFatFileAttributes)attributes },
CreationDateTimeOffset = { Value = now },
LastWriteDateTimeOffset = { Value = now },
LastAccessDateTimeOffset = { Value = now },
},
new StreamExtensionExFatDirectoryEntry(new Buffer(new byte[32]))
{
FirstCluster = { Value = 0 },
EntryType = { Value = ExFatDirectoryEntryType.Stream },
GeneralSecondaryFlags = { Value = ExFatGeneralSecondaryFlags.ClusterAllocationPossible },
NameLength = { Value = (byte)name.Length },
NameHash = { Value = _partition.ComputeNameHash(name) },
}
};
for (int nameIndex = 0; nameIndex < name.Length; nameIndex += 15)
{
var namePart = name.Substring(nameIndex, Math.Min(15, name.Length - nameIndex));
entries.Add(new FileNameExtensionExFatDirectoryEntry(new Buffer(new byte[32]))
{
EntryType = { Value = ExFatDirectoryEntryType.FileName },
FileName = { Value = namePart }
});
}
var metaEntry = new ExFatMetaDirectoryEntry(entries);
var entry = new ExFatFilesystemEntry(parent.DataDescriptor, metaEntry);
return(entry);
}
