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osu-lazer/osu.Game/Beatmaps/IO/OszArchiveReader.cs
2017-07-26 20:22:02 +09:00

49 lines
1.4 KiB
C#

// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Ionic.Zip;
namespace osu.Game.Beatmaps.IO
{
public sealed class OszArchiveReader : ArchiveReader
{
private readonly Stream archiveStream;
private readonly ZipFile archive;
public OszArchiveReader(Stream archiveStream)
{
this.archiveStream = archiveStream;
archive = ZipFile.Read(archiveStream);
}
public override Stream GetStream(string name)
{
ZipEntry entry = archive.Entries.SingleOrDefault(e => e.FileName == name);
if (entry == null)
throw new FileNotFoundException();
// allow seeking
MemoryStream copy = new MemoryStream();
using (Stream s = entry.OpenReader())
s.CopyTo(copy);
copy.Position = 0;
return copy;
}
public override void Dispose()
{
archive.Dispose();
archiveStream.Dispose();
}
public override IEnumerable<string> Filenames => archive.Entries.Select(e => e.FileName).ToArray();
public override Stream GetUnderlyingStream() => archiveStream;
}
}