public override Int32 Overwrite(
Object fileNode,
Object fileDesc0,
UInt32 fileAttributes,
Boolean replaceFileAttributes,
UInt64 allocationSize,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
MakeWriteable(fileDesc);
if (replaceFileAttributes)
{
fileDesc.SetFileAttributes(fileAttributes | (UInt32)System.IO.FileAttributes.Archive);
}
else if (0 != fileAttributes)
{
fileDesc.SetFileAttributes(fileDesc.GetFileAttributes() | fileAttributes | (UInt32)System.IO.FileAttributes.Archive);
}
fileDesc.WriteStream.SetLength(0);
return(fileDesc.GetFileInfo(out fileInfo));
}
public override Int32 GetFileInfo(
Object fileNode,
Object fileDesc0,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
return(fileDesc.GetFileInfo(out fileInfo));
}
public override Int32 SetBasicInfo(
Object fileNode,
Object fileDesc0,
UInt32 fileAttributes,
UInt64 creationTime,
UInt64 lastAccessTime,
UInt64 lastWriteTime,
UInt64 changeTime,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
MakeWriteable(fileDesc);
fileDesc.SetBasicInfo(fileAttributes, creationTime, lastAccessTime, lastWriteTime);
return(fileDesc.GetFileInfo(out fileInfo));
}
public override Int32 Flush(
Object fileNode,
Object fileDesc0,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
if (null == fileDesc)
{
/* we do not flush the whole volume, so just return SUCCESS */
fileInfo = default(FileInfo);
return(STATUS_SUCCESS);
}
fileDesc.Flush();
return(fileDesc.GetFileInfo(out fileInfo));
}
public override Int32 Write(
Object fileNode,
Object fileDesc0,
IntPtr buffer,
UInt64 offset,
UInt32 length,
Boolean writeToEndOfFile,
Boolean constrainedIo,
out UInt32 pBytesTransferred,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
MakeWriteable(fileDesc);
FileStream stream = fileDesc.WriteStream;
if (constrainedIo)
{
if (offset >= (UInt64)stream.Length)
{
pBytesTransferred = default(UInt32);
fileInfo = default(FileInfo);
return(STATUS_SUCCESS);
}
if (offset + length > (UInt64)stream.Length)
{
length = (UInt32)((UInt64)stream.Length - offset);
}
}
Byte[] bytes = new byte[length];
Marshal.Copy(buffer, bytes, 0, bytes.Length);
if (!writeToEndOfFile)
{
stream.Seek((Int64)offset, SeekOrigin.Begin);
}
stream.Write(bytes, 0, bytes.Length);
pBytesTransferred = (UInt32)bytes.Length;
return(fileDesc.GetFileInfo(out fileInfo));
}
public override Int32 SetFileSize(
Object fileNode,
Object fileDesc0,
UInt64 newSize,
Boolean setAllocationSize,
out FileInfo fileInfo)
{
FileDescriptor fileDesc = (FileDescriptor)fileDesc0;
MakeWriteable(fileDesc);
if (!setAllocationSize || (UInt64)fileDesc.WriteStream.Length > newSize)
{
/*
* "FileInfo.FileSize > NewSize" explanation:
* Ptfs does not support allocation size. However if the new AllocationSize
* is less than the current FileSize we must truncate the file.
*/
fileDesc.WriteStream.SetLength((Int64)newSize);
}
return(fileDesc.GetFileInfo(out fileInfo));
}
