implemented 'NEKOPACK4A' archives.

ArcFormats/ArcFormats.csproj

@@ -180,6 +180,7 @@
     <Compile Include="Morning\ArcTTD.cs" />
     <Compile Include="Nekopunch\ArcPAK.cs" />
     <Compile Include="NekoSDK\ArcDAT.cs" />
+    <Compile Include="NekoSDK\ArcPAK.cs" />
     <Compile Include="NekoSDK\ImageALP.cs" />
     <Compile Include="NitroPlus\ArcPAK.cs" />
     <Compile Include="MnoViolet\ImageDIF.cs" />

ArcFormats/NekoSDK/ArcPAK.cs

@@ -0,0 +1,127 @@
+//! \file       ArcPAK.cs
+//! \date       Thu Sep 29 15:17:42 2016
+//! \brief      NekoSDK NEKOPACK 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 GameRes.Compression;
+using GameRes.Utility;
+
+namespace GameRes.Formats.NekoSDK
+{
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "NEKOPACK/4"; } }
+        public override string Description { get { return "NekoSDK engine resource archive"; } }
+        public override uint     Signature { get { return 0x4F4B454E; } } // 'NEKOPACK'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public PakOpener ()
+        {
+            Extensions = new string[] { "pak" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (0, "NEKOPACK4"))
+                return null;
+            int version = file.View.ReadByte (9);
+            uint index_offset, index_end;
+            if ('A' == version)
+            {
+                index_offset = 0xE;
+                index_end = index_offset + file.View.ReadUInt32 (0xA);
+            }
+            else if ('S' == version)
+            {
+                index_offset = 0xA;
+                index_end = index_offset + file.View.ReadUInt32 (0xA) + 12;
+            }
+            else
+            {
+                return null;
+            }
+            var dir = new List<Entry>();
+            var name_buffer = new byte[0x100];
+            while (index_offset < index_end)
+            {
+                uint name_length = file.View.ReadUInt32 (index_offset);
+                index_offset += 4;
+                if (0 == name_length)
+                    break;
+                if (name_length > name_buffer.Length)
+                    return null;
+                file.View.Read (index_offset, name_buffer, 0, name_length);
+                index_offset += name_length;
+                uint key = 0;
+                for (uint i = 0; i < name_length; ++i)
+                    key += name_buffer[i];
+                var name = Binary.GetCString (name_buffer, 0, (int)name_length);
+                var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset)   ^ key;
+                entry.Size   = file.View.ReadUInt32 (index_offset+4) ^ key;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 8;
+            }
+            if (0 == dir.Count)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            uint key = entry.Size / 8 + 0x22;
+            var header = new byte[Math.Min (4, entry.Size)];
+            arc.File.View.Read (entry.Offset, header, 0, (uint)header.Length);
+            for (int i = 0; i < header.Length; ++i)
+            {
+                header[i] ^= (byte)key;
+                key <<= 3;
+            }
+            var pent = entry as PackedEntry;
+            if (null != pent && !pent.IsPacked && entry.Size >= 8)
+            {
+                pent.IsPacked = true;
+                pent.UnpackedSize = arc.File.View.ReadUInt32 (entry.Offset+entry.Size-4);
+            }
+            Stream input;
+            if (header.Length == entry.Size)
+            {
+                input = new MemoryStream (header);
+            }
+            else
+            {
+                input = arc.File.CreateStream (entry.Offset+4, entry.Size-8);
+                input = new PrefixStream (header, input);
+            }
+            return new ZLibStream (input, CompressionMode.Decompress);
+        }
+    }
+}

supported.html

@@ -389,6 +389,7 @@ Onsen Kankou Yukemuri Chijou<br/>
 Oshiete! Bloomer Sensei<br/>
 Ryoujoku Costume Play<br/>
 Seikoujo Claudia<br/>
+Shinshoku<br/>
 Sweet and Sweet<br/>
 Taijoku no Ori<br/>
 </td></tr>
@@ -555,6 +556,7 @@ Dungeon Crusaderz ~Tales of Demon Eater~<br/>
 Dungeon Crusaderz 2 ~Eigou no Rakudo~<br/>
 Inkou Haden Amatsu ~Hakudaku no Juin~<br/>
 Magical Witch Academy<br/>
+Magical Witch Concerto<br/>
 Medorei ~Okasareta Houkago~<br/>
 Onna Kyoushi<br/>
 Ore to Kanojo wa Shuju na Kankei<br/>
@@ -1163,6 +1165,9 @@ Lost Child<br/>
 </td></tr>
 <tr class="odd"><td>*.sur</td><td><tt>ESUR</tt></td><td>No</td></tr>
 <tr class="odd last"><td>*.esd</td><td><tt>ESD</tt></td><td>No</td></tr>
+<tr><td>*.pak</td><td><tt>NEKOPACK4A</tt></td><td>No</td><td>NekoSDK</td><td>
+In Vitro Shoujo -Aragaishi Junshin Naru Shoujo-<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>