implemented MK2.0 archives.

ArcFormats/ArcFormats.csproj

@@ -143,6 +143,7 @@
     <Compile Include="LiveMaker\WidgetGAL.xaml.cs">
       <DependentUpon>WidgetGAL.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Maika\ArcMK2.cs" />
     <Compile Include="MangaGamer\WidgetMGPK.xaml.cs">
       <DependentUpon>WidgetMGPK.xaml</DependentUpon>
     </Compile>

ArcFormats/Maika/ArcMK2.cs

@@ -0,0 +1,154 @@
+//! \file       ArcMK2.cs
+//! \date       Thu Aug 04 05:11:20 2016
+//! \brief      MAIKA resource archives.
+//
+// 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.Maika
+{
+    [Export(typeof(ArchiveFormat))]
+    public class Mk2Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "DAT/MK2"; } }
+        public override string Description { get { return "MAIKA resource archive"; } }
+        public override uint     Signature { get { return 0x2E324B4D; } } // 'MK2.0'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "0\0"))
+                return null;
+            int count = file.View.ReadInt32 (0x12);
+            if (!IsSaneCount (count))
+                return null;
+            uint base_offset  = file.View.ReadUInt16 (8);
+            uint index_offset = file.View.ReadUInt32 (0xE);
+            if (index_offset >= file.MaxOffset)
+                return null;
+            uint index_size   = file.View.ReadUInt32 (0xA);
+            if (index_size > file.View.Reserve (index_offset, index_size))
+                return null;
+
+            uint current_offset = index_offset;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < 512; ++i)
+            {
+                uint entry_offset = index_offset + file.View.ReadUInt32 (current_offset);
+                int n = file.View.ReadUInt16 (current_offset+4);
+                if (n > 0)
+                {
+                    for (int j = 0; j < n; ++j)
+                    {
+                        uint offset = file.View.ReadUInt32 (entry_offset) + base_offset;
+                        uint size   = file.View.ReadUInt32 (entry_offset+4);
+                        uint name_length = file.View.ReadByte (entry_offset+8);
+                        if (0 == name_length)
+                            return null;
+                        var name = file.View.ReadString (entry_offset+9, name_length);
+                        entry_offset += 9 + name_length;
+
+                        var entry = FormatCatalog.Instance.Create<Entry> (name);
+                        entry.Offset = offset;
+                        entry.Size   = size;
+                        if (!entry.CheckPlacement (index_offset))
+                            return null;
+                        dir.Add (entry);
+                    }
+                }
+                else if (-1 == file.View.ReadInt32 (entry_offset))
+                    break;
+                current_offset += 6;
+            }
+            if (0 == dir.Count)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            ushort signature = arc.File.View.ReadUInt16 (entry.Offset);
+            if (0x3146 != signature && 0x3143 != signature && 0x3144 != signature)
+                return base.OpenEntry (arc, entry);
+            uint packed_size = arc.File.View.ReadUInt32 (entry.Offset+2);
+            if (packed_size < 14 || packed_size > entry.Size-10)
+                return base.OpenEntry (arc, entry);
+            var prefix = arc.File.View.ReadBytes (entry.Offset+10, 14);
+            byte t = prefix[7];
+            prefix[7] = prefix[11];
+            prefix[11] = t;
+            t = prefix[9];
+            prefix[9] = prefix[12];
+            prefix[12] = t;
+            Stream input = arc.File.CreateStream (entry.Offset+24, packed_size-14);
+            input = new PrefixStream (prefix, input);
+            input = new LzssStream (input);
+            var header = new byte[5];
+            input.Read (header, 0, 5);
+            if (!Binary.AsciiEqual (header, "BPR02"))
+                return new PrefixStream (header, input);
+            using (input)
+                return Unpack (input);
+        }
+
+        Stream Unpack (Stream input)
+        {
+            using (var reader = new ArcView.Reader (input))
+            {
+                var output = new MemoryStream();
+                var buffer = new byte[0x10000];
+                for (;;)
+                {
+                    int ctl = input.ReadByte();
+                    if (-1 == ctl || 0xFF == ctl)
+                        break;
+                    int count = reader.ReadInt32();
+                    if (3 == ctl)
+                    {
+                        byte b = reader.ReadByte();
+                        for (int i = 0; i < count; ++i)
+                            output.WriteByte (b);
+                    }
+                    else
+                    {
+                        while (count > 0)
+                        {
+                            int chunk = Math.Min (count, buffer.Length);
+                            int read = reader.Read (buffer, 0, chunk);
+                            output.Write (buffer, 0, read);
+                            count -= chunk;
+                        }
+                    }
+                }
+                output.Position = 0;
+                return output;
+            }
+        }
+    }
+}

supported.html

@@ -1012,6 +1012,9 @@ Rakuin Hime Runed Princess<br/>
 <tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>NekoSDK</td><td>
 Elevator Panic ~Misshitsu no Inkou~<br/>
 </td></tr>
+<tr><td>*.dat</td><td><tt>MK2.0</tt></td><td>No</td><td>MAIKA</td><td>
+Uchuu Keiji Soldivan<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>