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duckdoom4
2023-01-18 10:57:16 +01:00
parent b8412c2556
commit 1609b9c4e4
36 changed files with 3377 additions and 226 deletions
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81
pkNX.Containers/VFS/VirtualFileSystem.cs
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@@ -2,22 +2,36 @@
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
namespace pkNX.Containers.VFS;
public record MountPoint(FileSystemPath Path, IFileSystem FileSystem) : IComparable<MountPoint>
public record MountPoint
{
public int CompareTo(MountPoint? other)
public FileSystemPath MountPath { get; }
public IFileSystem FileSystem { get; }
public FileSystemPath ToAbsolutePath(FileSystemPath path)
{
return other?.Path.CompareTo(Path) ?? 1;
return MountPath.AppendPath(path);
}
public FileSystemPath ToRelativePath(FileSystemPath path)
{
return path.IsRoot ? path : path.MakeRelativeTo(MountPath);
}
public MountPoint(FileSystemPath mountPath, IFileSystem fileSystem)
{
MountPath = mountPath;
FileSystem = fileSystem.AsRelativeFileSystem(ToAbsolutePath, ToRelativePath);
}
}
public class VirtualFileSystem : IFileSystem
{
public bool IsReadOnly => Mounts.All(x => x.FileSystem.IsReadOnly);
public SortedSet<MountPoint> Mounts { get; }
public bool IsReadOnly => Mounts.All(x => x.FileSystem.IsReadOnly);
public VirtualFileSystem(IEnumerable<MountPoint> mounts)
{
@@ -28,11 +42,6 @@ public VirtualFileSystem(IEnumerable<MountPoint> mounts)
this(mounts.AsEnumerable())
{ }
protected MountPoint Get(FileSystemPath path)
{
return Mounts.First(pair => pair.Path == path || pair.Path.IsParentOf(path));
}
public void Dispose()
{
foreach (var fs in Mounts.Select(x => x.FileSystem))
@@ -41,40 +50,64 @@ public void Dispose()
GC.SuppressFinalize(this);
}
public IEnumerable<FileSystemPath> GetEntities(FileSystemPath path)
protected MountPoint GetMountPoint(FileSystemPath path)
{
MountPoint point = Get(path);
IEnumerable<FileSystemPath> entities = point.FileSystem.GetEntities(path.IsRoot ? path : path.RemoveParent(point.Path));
return entities.Select(p => point.Path.AppendPath(p));
return Mounts.First(mount => mount.MountPath == path || mount.MountPath.IsParentOf(path));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public IEnumerable<FileSystemPath> GetEntityPaths(FileSystemPath path)
{
var mount = GetMountPoint(path);
return mount.FileSystem.GetEntityPaths(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public IEnumerable<FileSystemPath> GetDirectoryPaths(FileSystemPath path)
{
var mount = GetMountPoint(path);
return mount.FileSystem.GetDirectoryPaths(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public IEnumerable<FileSystemPath> GetFilePaths(FileSystemPath path)
{
var mount = GetMountPoint(path);
return mount.FileSystem.GetFilePaths(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool Exists(FileSystemPath path)
{
var pair = Get(path);
return pair.FileSystem.Exists(path.RemoveParent(pair.Path));
var mount = GetMountPoint(path);
return mount.FileSystem.Exists(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Stream CreateFile(FileSystemPath path)
{
var pair = Get(path);
return pair.FileSystem.CreateFile(path.RemoveParent(pair.Path));
var mount = GetMountPoint(path);
return mount.FileSystem.CreateFile(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Stream OpenFile(FileSystemPath path, FileAccess access)
{
var pair = Get(path);
return pair.FileSystem.OpenFile(path.RemoveParent(pair.Path), access);
var mount = GetMountPoint(path);
return mount.FileSystem.OpenFile(path, access);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void CreateDirectory(FileSystemPath path)
{
var pair = Get(path);
pair.FileSystem.CreateDirectory(path.RemoveParent(pair.Path));
var mount = GetMountPoint(path);
mount.FileSystem.CreateDirectory(path);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Delete(FileSystemPath path)
{
var pair = Get(path);
pair.FileSystem.Delete(path.RemoveParent(pair.Path));
var mount = GetMountPoint(path);
mount.FileSystem.Delete(path);
}
}