GARbro-mirror/ArcFormats/ScenePlayer/ArcPMX.cs

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//! \file ArcPMX.cs
//! \date 2017 Nov 23
//! \brief ScenePlayer scripts archive.
//
// Copyright (C) 2017 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
namespace GameRes.Formats.ScenePlayer
{
[Export(typeof(ArchiveFormat))]
public class PmxOpener : ArchiveFormat
{
public override string Tag { get { return "PMX"; } }
public override string Description { get { return "ScenePlayer scripts archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.HasExtension (".pmx")
|| file.View.ReadByte (0) != (0x78^0x21))
return null;
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var input = CreatePmxStream (file);
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bool index_complete = false;
try
{
using (var index = new BinaryStream (input, file.Name, true))
{
int count = index.ReadInt32();
if (!IsSaneCount (count))
return null;
var dir = new List<Entry> (count);
uint data_offset = 4 + (uint)count * 0x24;
for (int i = 0; i < count; ++i)
{
var name = index.ReadCString (0x20);
// IsPathRooted throws on invalid filename characters
if (string.IsNullOrWhiteSpace (name) || Path.IsPathRooted (name))
return null;
uint size = index.ReadUInt32();
var entry = new Entry {
Name = name,
Type = "script",
Offset = data_offset,
Size = size,
};
dir.Add (entry);
data_offset += size;
}
index_complete = true;
return new PmxArchive (file, this, dir, input);
}
}
finally
{
if (!index_complete)
input.Dispose();
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var parc = (PmxArchive)arc;
return new StreamRegion (parc.BaseStream, entry.Offset, entry.Size, true);
}
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internal Stream CreatePmxStream (ArcView file)
{
Stream input = file.CreateStream();
input = new XoredStream (input, 0x21);
input = new ZLibStream (input, CompressionMode.Decompress);
return new SeekableStream (input);
}
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}
internal class PmxArchive : ArcFile
{
public readonly Stream BaseStream;
public PmxArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, Stream base_stream)
: base (arc, impl, dir)
{
BaseStream = base_stream;
}
bool m_disposed = false;
protected override void Dispose (bool disposing)
{
if (!m_disposed)
{
if (disposing)
BaseStream.Dispose();
m_disposed = true;
}
}
}
}