public int GetEntryCount()
{
int count = 0;
FindPosition position = InitialPosition;
HierarchicalRomFileTable <RomFileInfo> tab = ParentFileSystem.FileTable;
if (Mode.HasFlag(OpenDirectoryMode.Directories))
{
while (tab.FindNextDirectory(ref position, out string _))
{
count++;
}
}
if (Mode.HasFlag(OpenDirectoryMode.Files))
{
while (tab.FindNextFile(ref position, out RomFileInfo _, out string _))
{
count++;
}
}
return(count);
}
public RomFsDirectory(RomFsFileSystem fs, string path, FindPosition position, OpenDirectoryMode mode)
{
ParentFileSystem = fs;
InitialPosition = position;
FullPath = path;
Mode = mode;
}
/// <summary>
/// Returns the next file in a directory and updates the enumerator's position.
/// </summary>
/// <param name="position">The current position of the directory enumerator.
/// This position will be updated when the method returns.</param>
/// <param name="info">When this method returns, contains the file's metadata.</param>
/// <param name="name">When this method returns, contains the file's name (Not the full path).</param>
/// <returns><see langword="true"/> if the next file was successfully returned.
/// <see langword="false"/> if there are no more files to enumerate.</returns>
public bool FindNextFile(ref FindPosition position, out RomFileInfo info, out string name)
{
if (position.NextFile == -1)
{
info = default;
name = default;
return(false);
}
ref FileRomEntry entry = ref FileTable.GetValueReference(position.NextFile, out Span <byte> nameBytes);
/// <summary>
/// Opens a directory for enumeration.
/// </summary>
/// <param name="directoryId">The ID of the directory to open.</param>
/// <param name="position">When this method returns, contains the initial position of the directory enumerator.</param>
/// <returns><see langword="true"/> if the table contains a directory with the specified path;
/// otherwise, <see langword="false"/>.</returns>
public bool TryOpenDirectory(int directoryId, out FindPosition position)
{
if (DirectoryTable.TryGetValue(directoryId, out RomKeyValuePair <DirectoryRomEntry> keyValuePair))
{
position = keyValuePair.Value.Pos;
return(true);
}
position = default;
return(false);
}
/// <summary>
/// Opens a directory for enumeration.
/// </summary>
/// <param name="path">The full path of the directory to open.</param>
/// <param name="position">The initial position of the directory enumerator.</param>
/// <returns><see langword="true"/> if the table contains a directory with the specified path;
/// otherwise, <see langword="false"/>.</returns>
public bool TryOpenDirectory(string path, out FindPosition position)
{
FindPathRecursive(Util.GetUtf8Bytes(path), out RomEntryKey key);
if (DirectoryTable.TryGetValue(ref key, out RomKeyValuePair <DirectoryRomEntry> keyValuePair))
{
position = keyValuePair.Value.Pos;
return(true);
}
position = default;
return(false);
}
public IEnumerable <DirectoryEntry> Read()
{
FindPosition position = InitialPosition;
HierarchicalRomFileTable <RomFileInfo> tab = ParentFileSystem.FileTable;
if (Mode.HasFlag(OpenDirectoryMode.Directories))
{
while (tab.FindNextDirectory(ref position, out string name))
{
yield return(new DirectoryEntry(name, PathTools.Combine(FullPath, name), DirectoryEntryType.Directory, 0));
}
}
if (Mode.HasFlag(OpenDirectoryMode.Files))
{
while (tab.FindNextFile(ref position, out RomFileInfo info, out string name))
{
yield return(new DirectoryEntry(name, PathTools.Combine(FullPath, name), DirectoryEntryType.File, info.Length));
}
}
}