internal ExpandedPath.Action LocateNodeByExpandedPath(ExpandedPath ep, NodeProvider node, out NodeProvider?handlingNode)
{
var action = node.HandlePath(ep);
switch (action)
{
case Unknown:
throw new NotImplementedException($"handler for {node.GetType().ToString()} returned Unknown");
case NotFound:
// TODO
handlingNode = null;
return(ExpandedPath.Action.NotFound);
case PassThrough:
// TODO
foreach (var child in node.Children)
{
var res = LocateNodeByExpandedPath(ep.NextLevel(), child, out handlingNode);
if (res == ExpandedPath.Action.Handle)
{
return(ExpandedPath.Action.Handle);
}
}
handlingNode = null;
return(ExpandedPath.Action.NotFound);
case Handle:
handlingNode = node;
return(ExpandedPath.Action.Handle);
}
handlingNode = null;
return(ExpandedPath.Action.Unknown);
}
public override sealed Errno OnOpenHandle(ExpandedPath file, PathInfo info)
{
var descriptor = 0x2a000000 + new Random().Next(0x1000000);
info.Handle = new IntPtr(descriptor);
return(0);
}
public override ExpandedPath.Action HandlePath(ExpandedPath ep)
{
LoadChromosomeList(ep);
if (ep.Level > ep.Components.Count)
{
return(ExpandedPath.Action.Unknown);
}
else if (ep.Level == ep.Components.Count)
{
return(ExpandedPath.Action.Handle);
}
else
{
return(ExpandedPath.Action.PassThrough);
}
}
public Errno OnOpenHandle(
string file,
PathInfo info)
{
var ep = new ExpandedPath(file);
NodeProvider?node;
var action = LocateNodeByExpandedPath(ep, Root, out node);
if (action == ExpandedPath.Action.Handle && node != null)
{
return(node.OnOpenHandle(ep, info));
}
else
{
return(Errno.ENOENT);
}
}
public void LoadChromosomeList(ExpandedPath ep)
{
if (chromosomes.ContainsKey(ep.Components[0]))
{
return;
}
var speciesDbName = ep.Components[0];
var chromosomeList = Slice.GetSpeciesChromosomeList(speciesDbName);
var chromosomeForSpecies = chromosomeList
.Select(name =>
{
return(new NamedStat(name, Extensions.StandardDir()));
}).ToList();
chromosomes[speciesDbName] = chromosomeForSpecies;
}
public override Errno OnGetPathStatus(ExpandedPath path, out NamedStat entry)
{
LoadChromosomeList(path);
var species = path.Components[0];
var chromosome = path.Components.Last();
if (chromosomes.ContainsKey(species))
{
entry = chromosomes[species].Where(ns => ns.Name == chromosome).First();
return(0);
}
else
{
entry = new NamedStat();
return(Errno.ENOENT);
}
}
public Errno OnGetPathStatus(
string path,
out Stat entry)
{
var ep = new ExpandedPath(path);
NodeProvider?node;
var action = LocateNodeByExpandedPath(ep, Root, out node);
if (action == ExpandedPath.Action.Handle && node != null)
{
NamedStat nstat;
var res = node.OnGetPathStatus(ep, out nstat);
entry = nstat.Stat;
return(res);
}
else
{
entry = new Stat();
return(Errno.ENOENT);
}
}
public Errno OnReadHandle(
string file,
PathInfo info,
byte[] buf,
long offset,
out int bytesRead)
{
var ep = new ExpandedPath(file);
NodeProvider?node;
var action = LocateNodeByExpandedPath(ep, Root, out node);
if (action == ExpandedPath.Action.Handle && node != null)
{
return(node.OnReadHandle(ep, info, buf, offset, out bytesRead));
}
else
{
bytesRead = 0;
return(Errno.ENOENT);
}
}
public override Errno OnReadDirectory(ExpandedPath directory, PathInfo info, out IEnumerable <NamedStat> paths)
{
LoadChromosomeList(directory);
if (directory.Components.Count < Level)
{
if (chromosomes.ContainsKey(directory.Components[0]))
{
paths = chromosomes[directory.Components[0]];
return(0);
}
else
{
paths = new List <NamedStat>();
return(Errno.ENOENT);
}
}
else
{
return(Children[0].OnReadDirectory(directory, info, out paths));
}
}
public Errno OnReadDirectory(
string directory,
PathInfo info,
out IEnumerable <DirectoryEntry> paths)
{
var ep = new ExpandedPath(directory);
NodeProvider?node;
var action = LocateNodeByExpandedPath(ep, Root, out node);
if (action == ExpandedPath.Action.Handle && node != null)
{
IEnumerable <NamedStat> nstats;
var res = node.OnReadDirectory(ep, info, out nstats);
paths = nstats.Select(ns => new DirectoryEntry(ns.Name));
return(res);
}
else
{
paths = new List <DirectoryEntry>();
return(Errno.ENOENT);
}
}
public abstract Errno OnGetPathStatus(
ExpandedPath path,
out NamedStat entry);
public override sealed Errno OnReadDirectory(ExpandedPath directory, PathInfo info, out IEnumerable <NamedStat> paths)
{
throw new System.NotImplementedException("FileProvider.OnReadDirectory marked as sealed, not implemented");
}
public abstract Errno OnReadHandle(
ExpandedPath file,
PathInfo info,
byte[] buf,
long offset,
out int bytesRead);
public ExpandedPath(ExpandedPath ep, int newLevel)
{
FullPath = ep.FullPath;
Level = newLevel;
Components = ep.Components;
}
public abstract Errno OnReadDirectory(
ExpandedPath directory,
PathInfo info,
out IEnumerable <NamedStat> paths);
public abstract Errno OnOpenHandle(
ExpandedPath file,
PathInfo info);
public override sealed Errno OnOpenHandle(ExpandedPath file, PathInfo info)
{
throw new System.NotImplementedException($"DirectoryProvider.OnOpenHandle({file.FullPath}) marked as sealed, not implemented");
}
public abstract ExpandedPath.Action HandlePath(ExpandedPath ep);
public override sealed Errno OnReadHandle(ExpandedPath file, PathInfo info, byte[] buf, long offset, out int bytesRead)
{
throw new System.NotImplementedException("DirectoryProvider.OnReadHandle marked as sealed, not implemented");
}
