implemented sudio e.go! PAK0 archives.

ArcFormats/ArcFormats.csproj

@@ -72,6 +72,7 @@
     <Compile Include="Propeller\ArcMGR.cs" />
     <Compile Include="Propeller\ArcMPK.cs" />
     <Compile Include="Propeller\ImageMGR.cs" />
+    <Compile Include="StudioEgo\ArcPAK0.cs" />
     <Compile Include="TechnoBrain\ImageIPH.cs" />
     <Compile Include="ArcDX.cs" />
     <Compile Include="ArcMiris.cs" />
@@ -134,7 +135,7 @@
     <Compile Include="Dac\ArcDPK.cs" />
     <Compile Include="Ikura\ArcDRS.cs" />
     <Compile Include="Eagls\ArcEAGLS.cs" />
-    <Compile Include="ArcEGO.cs" />
+    <Compile Include="StudioEgo\ArcEGO.cs" />
     <Compile Include="Ffa\ArcFFA.cs" />
     <Compile Include="Interheart\ArcFPK.cs" />
     <Compile Include="ArcFVP.cs" />

ArcFormats/StudioEgo/ArcEGO.cs

@@ -36,7 +36,7 @@ namespace GameRes.Formats.Ego
     [Export(typeof(ArchiveFormat))]
     public class DatOpener : ArchiveFormat
     {
-        public override string         Tag { get { return "EGO"; } }
+        public override string         Tag { get { return "DAT/EGO"; } }
         public override string Description { get { return "Studio e.go! engine resource archive"; } }
         public override uint     Signature { get { return 0; } }
         public override bool  IsHierarchic { get { return true; } }

ArcFormats/StudioEgo/ArcPAK0.cs

@@ -0,0 +1,139 @@
+//! \file       ArcPAK0.cs
+//! \date       Sun Nov 22 10:31:48 2015
+//! \brief      Studio e.go! resource archives.
+//
+// Copyright (C) 2015 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;
+
+namespace GameRes.Formats.Ego
+{
+    internal struct DirEntry
+    {
+        public string   Name;
+        public int      Parent;
+        public int      LastIndex;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class Pak0Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAK0/EGO"; } }
+        public override string Description { get { return "Studio e.go! resource archive"; } }
+        public override uint     Signature { get { return 0x304B4150; } } // 'PAK0'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public Pak0Opener ()
+        {
+            Extensions = new string[] { "dat" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            uint data_offset   = file.View.ReadUInt32 (4);
+            int  dir_count     = file.View.ReadInt32 (8);
+            int  count         = file.View.ReadInt32 (0xC);
+            if (data_offset <= 0x14 || data_offset >= file.MaxOffset)
+                return null;
+            if (!IsSaneCount (dir_count) || !IsSaneCount (count))
+                return null;
+            var reader = new Pak0Reader (file, data_offset, dir_count, count);
+            var dir = reader.ReadIndex();
+            return null != dir ? new ArcFile (file, this, dir) : null;
+        }
+    }
+
+    internal sealed class Pak0Reader
+    {
+        ArcView     m_file;
+        uint        m_data_offset;
+        int         m_dir_count;
+        int         m_count;
+        uint        m_name_pos;
+
+        public Pak0Reader (ArcView file, uint data_offset, int dir_count, int file_count)
+        {
+            m_file = file;
+            m_data_offset   = data_offset;
+            m_dir_count     = dir_count;
+            m_count         = file_count;
+        }
+
+        public List<Entry> ReadIndex ()
+        {
+            if (m_data_offset > m_file.View.Reserve (0, m_data_offset))
+                return null;
+            uint index_offset = 0x10;
+            m_name_pos = index_offset + (uint)m_dir_count * 8u + (uint)m_count * 0x10u;
+            var dirs = new DirEntry[m_dir_count];
+            for (int i = 0; i < m_dir_count; ++i)
+            {
+                dirs[i].Parent    = m_file.View.ReadInt32 (index_offset);
+                dirs[i].LastIndex = m_file.View.ReadInt32 (index_offset+4);
+                if (dirs[i].Parent >= m_dir_count || dirs[i].Parent == i)
+                    return null;
+                if (-1 != dirs[i].Parent)
+                    dirs[i].Name = ReadNextName();
+                index_offset += 8;
+            }
+            var files = new List<Entry> (m_count);
+            int current = 0;
+            for (int i = 0; i < m_dir_count; ++i)
+            {
+                string parent_dir = GetPath (dirs, i);
+                while (current < dirs[i].LastIndex)
+                {
+                    string name = Path.Combine (parent_dir, ReadNextName());
+                    var entry = FormatCatalog.Instance.Create<Entry> (name);
+                    entry.Offset = m_file.View.ReadUInt32 (index_offset);
+                    entry.Size   = m_file.View.ReadUInt32 (index_offset+4);
+                    files.Add (entry);
+                    index_offset += 0x10;
+                    ++current;
+                }
+            }
+            return files;
+        }
+
+        string GetPath (IList<DirEntry> dirs, int dir_index)
+        {
+            List<string> path = new List<string> (2);
+            for (int i = dir_index; dirs[i].Parent != -1; i = dirs[i].Parent)
+                path.Add (dirs[i].Name);
+            if (0 == path.Count)
+                return string.Empty;
+            path.Reverse();
+            return Path.Combine (path.ToArray());
+        }
+
+        string ReadNextName ()
+        {
+            uint length = m_file.View.ReadByte (m_name_pos++);
+            var name = m_file.View.ReadString (m_name_pos, length);
+            m_name_pos += length;
+            return name;
+        }
+    }
+}

supported.html

@@ -182,6 +182,7 @@ Zecchou Spiral!!<br/>
 <tr><td>*.isg</td><td><tt>ISM IMAGEFILE</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.dat<br/>*.pak</td><td>-</td><td>No</td><td rowspan="2">Black Rainbow</td><td rowspan="2">
 Gadget<br/>
+Fukou na Kami<br/>
 Saiminjutsu<br/>
 </td></tr>
 <tr class="odd"><td>*.bmd</td><td><tt>_BMD</tt></td><td>Yes</td></tr>
@@ -513,6 +514,9 @@ Genrin no Kishougun<br/>
 Bullet Butlers<br/>
 </td></tr>
 <tr class="odd"><td>*.mgr</td><td>-</td><td>No</td></tr>
+<tr><td>*.dat</td><td><tt>PAK0</tt></td><td>No</td><td>Studio e.go!</td><td>
+Izumo 2 ~Gakuen Kyousoukyoku~<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>