public override Int32 Open(
String FileName,
UInt32 CreateOptions,
UInt32 GrantedAccess,
out Object FileNode0,
out Object FileDesc,
out FileInfo FileInfo,
out String NormalizedName)
{
FileNode0 = default(Object);
FileDesc = default(Object);
FileInfo = default(FileInfo);
NormalizedName = default(String);
FileNode FileNode;
Int32 Result;
FileNode = FileNodeMap.Get(FileName);
if (null == FileNode)
{
Result = STATUS_OBJECT_NAME_NOT_FOUND;
FileNodeMap.GetParent(FileName, ref Result);
return(Result);
}
Interlocked.Increment(ref FileNode.OpenCount);
FileNode0 = FileNode;
FileInfo = FileNode.GetFileInfo();
NormalizedName = FileNode.FileName;
return(STATUS_SUCCESS);
}
public override Int32 GetFileInfo(
Object FileNode0,
Object FileDesc,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
FileInfo = FileNode.GetFileInfo();
return(STATUS_SUCCESS);
}
public override Int32 Write(
Object FileNode0,
Object FileDesc,
IntPtr Buffer,
UInt64 Offset,
UInt32 Length,
Boolean WriteToEndOfFile,
Boolean ConstrainedIo,
out UInt32 BytesTransferred,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
UInt64 EndOffset;
if (ConstrainedIo)
{
if (Offset >= FileNode.FileInfo.FileSize)
{
BytesTransferred = default(UInt32);
FileInfo = default(FileInfo);
return(STATUS_SUCCESS);
}
EndOffset = Offset + Length;
if (EndOffset > FileNode.FileInfo.FileSize)
{
EndOffset = FileNode.FileInfo.FileSize;
}
}
else
{
if (WriteToEndOfFile)
{
Offset = FileNode.FileInfo.FileSize;
}
EndOffset = Offset + Length;
if (EndOffset > FileNode.FileInfo.FileSize)
{
Int32 Result = SetFileSizeInternal(FileNode, EndOffset, false);
if (0 > Result)
{
BytesTransferred = default(UInt32);
FileInfo = default(FileInfo);
return(Result);
}
}
}
BytesTransferred = (UInt32)(EndOffset - Offset);
Marshal.Copy(Buffer, FileNode.FileData, (int)Offset, (int)BytesTransferred);
FileInfo = FileNode.GetFileInfo();
return(STATUS_SUCCESS);
}
public override Int32 Flush(
Object FileNode0,
Object FileDesc,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
/* nothing to flush, since we do not cache anything */
FileInfo = null != FileNode?FileNode.GetFileInfo() : default(FileInfo);
return(STATUS_SUCCESS);
}
public override Int32 Overwrite(
Object FileNode0,
Object FileDesc,
UInt32 FileAttributes,
Boolean ReplaceFileAttributes,
UInt64 AllocationSize,
out FileInfo FileInfo)
{
FileInfo = default(FileInfo);
FileNode FileNode = (FileNode)FileNode0;
Int32 Result;
List <String> StreamFileNames = new List <String>(FileNodeMap.GetStreamFileNames(FileNode));
foreach (String StreamFileName in StreamFileNames)
{
FileNode StreamNode = FileNodeMap.Get(StreamFileName);
if (null == StreamNode)
{
continue; /* should not happen */
}
if (0 == StreamNode.OpenCount)
{
FileNodeMap.Remove(StreamNode);
}
}
Result = SetFileSizeInternal(FileNode, AllocationSize, true);
if (0 > Result)
{
return(Result);
}
if (ReplaceFileAttributes)
{
FileNode.FileInfo.FileAttributes = FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
}
else
{
FileNode.FileInfo.FileAttributes |= FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
}
FileNode.FileInfo.FileSize = 0;
FileNode.FileInfo.LastAccessTime =
FileNode.FileInfo.LastWriteTime =
FileNode.FileInfo.ChangeTime = (UInt64)DateTime.Now.ToFileTimeUtc();
FileInfo = FileNode.GetFileInfo();
return(STATUS_SUCCESS);
}
public override Int32 SetFileSize(
Object FileNode0,
Object FileDesc,
UInt64 NewSize,
Boolean SetAllocationSize,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
Int32 Result;
Result = SetFileSizeInternal(FileNode, NewSize, SetAllocationSize);
FileInfo = 0 <= Result?FileNode.GetFileInfo() : default(FileInfo);
return(STATUS_SUCCESS);
}
public override Int32 SetBasicInfo(
Object FileNode0,
Object FileDesc,
UInt32 FileAttributes,
UInt64 CreationTime,
UInt64 LastAccessTime,
UInt64 LastWriteTime,
UInt64 ChangeTime,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
if (null != FileNode.MainFileNode)
{
FileNode = FileNode.MainFileNode;
}
if (unchecked ((UInt32)(-1)) != FileAttributes)
{
FileNode.FileInfo.FileAttributes = FileAttributes;
}
if (0 != CreationTime)
{
FileNode.FileInfo.CreationTime = CreationTime;
}
if (0 != LastAccessTime)
{
FileNode.FileInfo.LastAccessTime = LastAccessTime;
}
if (0 != LastWriteTime)
{
FileNode.FileInfo.LastWriteTime = LastWriteTime;
}
if (0 != ChangeTime)
{
FileNode.FileInfo.ChangeTime = ChangeTime;
}
FileInfo = FileNode.GetFileInfo();
return(STATUS_SUCCESS);
}
public override Boolean ReadDirectoryEntry(
Object FileNode0,
Object FileDesc,
String Pattern,
String Marker,
ref Object Context,
out String FileName,
out FileInfo FileInfo)
{
FileNode FileNode = (FileNode)FileNode0;
IEnumerator <String> Enumerator = (IEnumerator <String>)Context;
if (null == Enumerator)
{
List <String> ChildrenFileNames = new List <String>();
if ("\\" != FileNode.FileName)
{
/* if this is not the root directory add the dot entries */
if (null == Marker)
{
ChildrenFileNames.Add(".");
}
if (null == Marker || "." == Marker)
{
ChildrenFileNames.Add("..");
}
}
ChildrenFileNames.AddRange(FileNodeMap.GetChildrenFileNames(FileNode,
"." != Marker && ".." != Marker ? Marker : null));
Context = Enumerator = ChildrenFileNames.GetEnumerator();
}
while (Enumerator.MoveNext())
{
String FullFileName = Enumerator.Current;
if ("." == FullFileName)
{
FileName = ".";
FileInfo = FileNode.GetFileInfo();
return(true);
}
else if (".." == FullFileName)
{
Int32 Result = STATUS_SUCCESS;
FileNode ParentNode = FileNodeMap.GetParent(FileNode.FileName, ref Result);
if (null != ParentNode)
{
FileName = "..";
FileInfo = ParentNode.GetFileInfo();
return(true);
}
}
else
{
FileNode ChildFileNode = FileNodeMap.Get(FullFileName);
if (null != ChildFileNode)
{
FileName = Path.GetFileName(FullFileName);
FileInfo = ChildFileNode.GetFileInfo();
return(true);
}
}
}
FileName = default(String);
FileInfo = default(FileInfo);
return(false);
}
public override Int32 Create(
String FileName,
UInt32 CreateOptions,
UInt32 GrantedAccess,
UInt32 FileAttributes,
Byte[] SecurityDescriptor,
UInt64 AllocationSize,
out Object FileNode0,
out Object FileDesc,
out FileInfo FileInfo,
out String NormalizedName)
{
FileNode0 = default(Object);
FileDesc = default(Object);
FileInfo = default(FileInfo);
NormalizedName = default(String);
FileNode FileNode;
FileNode ParentNode;
Int32 Result = STATUS_SUCCESS;
FileNode = FileNodeMap.Get(FileName);
if (null != FileNode)
{
return(STATUS_OBJECT_NAME_COLLISION);
}
ParentNode = FileNodeMap.GetParent(FileName, ref Result);
if (null == ParentNode)
{
return(Result);
}
if (0 != (CreateOptions & FILE_DIRECTORY_FILE))
{
AllocationSize = 0;
}
if (FileNodeMap.Count() >= MaxFileNodes)
{
return(STATUS_CANNOT_MAKE);
}
if (AllocationSize > MaxFileSize)
{
return(STATUS_DISK_FULL);
}
if ("\\" != ParentNode.FileName)
{
/* normalize name */
FileName = ParentNode.FileName + "\\" + Path.GetFileName(FileName);
}
FileNode = new FileNode(FileName);
FileNode.MainFileNode = FileNodeMap.GetMain(FileName);
FileNode.FileInfo.FileAttributes = 0 != (FileAttributes & (UInt32)System.IO.FileAttributes.Directory) ?
FileAttributes : FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
FileNode.FileSecurity = SecurityDescriptor;
if (0 != AllocationSize)
{
Result = SetFileSizeInternal(FileNode, AllocationSize, true);
if (0 > Result)
{
return(Result);
}
}
FileNodeMap.Insert(FileNode);
Interlocked.Increment(ref FileNode.OpenCount);
FileNode0 = FileNode;
FileInfo = FileNode.GetFileInfo();
NormalizedName = FileNode.FileName;
return(STATUS_SUCCESS);
}
