Aaru/Aaru.Archives/Zoo/Xattrs.cs

// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : Xattrs.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Zoo plugin.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library is distributed in the hope that it will be useful, but
//     WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2025 Natalia Portillo
// ****************************************************************************/

using System.Collections.Generic;
using Aaru.CommonTypes.Enums;

namespace Aaru.Archives;

public sealed partial class Zoo
{
#region IArchive Members

    /// <inheritdoc />
    public ErrorNumber ListXAttr(int entryNumber, out List<string> xattrs)
    {
        xattrs = null;

        if(!Opened) return ErrorNumber.NotOpened;

        if(entryNumber < 0 || entryNumber >= _files.Count) return ErrorNumber.OutOfRange;

        Direntry entry = _files[entryNumber];

        xattrs = [];

        if(entry.cmt_size > 0) xattrs.Add("comment");

        return ErrorNumber.NoError;
    }

    /// <inheritdoc />
    public ErrorNumber GetXattr(int entryNumber, string xattr, ref byte[] buffer)
    {
        buffer = null;

        if(!Opened) return ErrorNumber.NotOpened;

        if(entryNumber < 0 || entryNumber >= _files.Count) return ErrorNumber.OutOfRange;

        Direntry entry = _files[entryNumber];

        if(xattr != "comment" || entry.cmt_size <= 0) return ErrorNumber.NoSuchExtendedAttribute;

        _stream.Position = entry.comment;
        buffer           = new byte[entry.cmt_size];
        _stream.ReadExactly(buffer, 0, buffer.Length);

        return ErrorNumber.NoError;
    }

#endregion
}