/// <summary>
/// Called to delete a child from a directory.
/// </summary>
/// <param name="child">The IVfsNode interface of the child.</param>
/// <param name="dentry">The DirectoryEntry of the child.</param>
/// <remarks>
/// This function deletes a child IVfsNode from a directory. If child is a directory, it will be empty
/// before this call is executed. It is recommended to include a debug sanity check though. If the file
/// system needs to know the name of the child to delete, it can retrieve it from <see cref="DirectoryEntry.Name"/>.
/// </remarks>
/// <exception cref="System.NotSupportedException">The object does not support removal this way. There's most likely an object specific API to remove this IVfsNode.</exception>
public override void Delete(IVfsNode child, DirectoryEntry dentry)
{
FatFileSystem fs = this.FileSystem as FatFileSystem;
uint targetCluster = (child as VfsDirectory).directoryCluster;
FatFileLocation location = fs.FindEntry(new Find.ByCluster(targetCluster), this.directoryCluster);
if (!location.Valid)
{
throw new System.ArgumentException(); //throw new IOException ("Unable to delete directory because it is not empty");
}
fs.Delete(targetCluster, location.DirectorySector, location.DirectorySectorIndex);
}
/// <summary>
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public override IVfsNode Lookup(string name)
{
FatFileLocation location = (FileSystem as VfsFileSystem).FAT.FindEntry(new Find.WithName(name), this.directoryCluster);
if (!location.Valid)
{
return(null);
}
if (location.IsDirectory)
{
return(new VfsDirectory(FileSystem, location.FirstCluster));
}
else
{
return(new VfsFile(FileSystem, location.FirstCluster, location.DirectorySector, location.DirectorySectorIndex));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="FatFileStream"/> class.
/// </summary>
/// <param name="fs">The fs.</param>
/// <param name="location">The location.</param>
public FatFileStream(FatFileSystem fs, FatFileLocation location)
: this(fs, location.FirstCluster, location.DirectorySector, location.DirectorySectorIndex)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="FatFileStream"/> class.
/// </summary>
/// <param name="fs">The fs.</param>
/// <param name="location">The location.</param>
public FatFileStream(FatFileSystem fs, FatFileLocation location)
: this(fs, location.FirstCluster, location.DirectorySector, location.DirectorySectorIndex)
{
}