GARbro-mirror/ArcFormats/BlackRainbow/ArcPAK.cs

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2016-06-26 04:20:36 +08:00
//! \file ArcPAK.cs
//! \date Sat Jun 25 21:39:46 2016
//! \brief Black Rainbow resource archive.
//
// Copyright (C) 2016 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;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using GameRes.Compression;
namespace GameRes.Formats.BlackRainbow
{
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
{
public override string Tag { get { return "PAK/MELTY"; } }
public override string Description { get { return "BlackRainbow/Melty resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public PakOpener ()
{
Extensions = new string[] { "pak" };
}
public override ArcFile TryOpen (ArcView file)
{
if (file.MaxOffset <= 8)
return null;
int count = file.View.ReadInt32 (file.MaxOffset-8);
if (!IsSaneCount (count))
return null;
uint index_size = file.View.ReadUInt32 (file.MaxOffset-4);
if (index_size >= file.MaxOffset-8)
return null;
long index_offset = file.MaxOffset - 8 - index_size;
using (var input = file.CreateStream (index_offset, index_size))
using (var index = new BinaryReader (input, Encoding.Unicode))
{
char[] name_buffer = new char[0x40];
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
uint offset = index.ReadUInt32();
uint packed_size = index.ReadUInt32();
uint unpacked_size = index.ReadUInt32();
int name_length = index.ReadInt32();
if (name_length <= 0 || name_length > 0x100 )
return null;
if (name_length > name_buffer.Length)
name_buffer = new char[name_length];
if (name_length != index.Read (name_buffer, 0, name_length))
return null;
var name = new string (name_buffer, 0, name_length);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = offset;
entry.Size = packed_size;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.IsPacked = uint.MaxValue != unpacked_size;
entry.UnpackedSize = entry.IsPacked ? unpacked_size : packed_size;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
return input;
return new ZLibStream (input, CompressionMode.Decompress);
}
}
}