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using Ryujinx.HLE.FileSystem;
using Ryujinx.HLE.HOS.Ipc;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace Ryujinx.HLE.HOS.Services.FspSrv
{
class IDirectory : IpcService, IDisposable
{
private const int DirectoryEntrySize = 0x310;
private Dictionary<int, ServiceProcessRequest> _commands;
public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
private List<DirectoryEntry> _directoryEntries;
private int _currentItemIndex;
public event EventHandler<EventArgs> Disposed;
public string DirectoryPath { get; private set; }
private IFileSystemProvider _provider;
public IDirectory(string directoryPath, int flags, IFileSystemProvider provider)
{
_commands = new Dictionary<int, ServiceProcessRequest>
{
{ 0, Read },
{ 1, GetEntryCount }
};
_provider = provider;
DirectoryPath = directoryPath;
_directoryEntries = new List<DirectoryEntry>();
if ((flags & 1) != 0)
{
_directoryEntries.AddRange(provider.GetDirectories(directoryPath));
}
if ((flags & 2) != 0)
{
_directoryEntries.AddRange(provider.GetFiles(directoryPath));
}
_currentItemIndex = 0;
}
// Read() -> (u64 count, buffer<nn::fssrv::sf::IDirectoryEntry, 6, 0> entries)
public long Read(ServiceCtx context)
{
long bufferPosition = context.Request.ReceiveBuff[0].Position;
long bufferLen = context.Request.ReceiveBuff[0].Size;
int maxReadCount = (int)(bufferLen / DirectoryEntrySize);
int count = Math.Min(_directoryEntries.Count - _currentItemIndex, maxReadCount);
for (int index = 0; index < count; index++)
{
long position = bufferPosition + index * DirectoryEntrySize;
WriteDirectoryEntry(context, position, _directoryEntries[_currentItemIndex++]);
}
context.ResponseData.Write((long)count);
return 0;
}
private void WriteDirectoryEntry(ServiceCtx context, long position, DirectoryEntry entry)
{
for (int offset = 0; offset < 0x300; offset += 8)
{
context.Memory.WriteInt64(position + offset, 0);
}
byte[] nameBuffer = Encoding.UTF8.GetBytes(Path.GetFileName(entry.Path));
context.Memory.WriteBytes(position, nameBuffer);
context.Memory.WriteInt32(position + 0x300, 0); //Padding?
context.Memory.WriteInt32(position + 0x304, (byte)entry.EntryType);
context.Memory.WriteInt64(position + 0x308, entry.Size);
}
// GetEntryCount() -> u64
public long GetEntryCount(ServiceCtx context)
{
context.ResponseData.Write((long)_directoryEntries.Count);
return 0;
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
Disposed?.Invoke(this, EventArgs.Empty);
}
}
}
}
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