implemented Circus PCK archives.

ArcFormats/ArcFormats.csproj

@@ -74,6 +74,7 @@
     <Compile Include="AZSys\ImageTYP1.cs" />
     <Compile Include="BlueGale\ArcSNN.cs" />
     <Compile Include="BlueGale\ImageZBM.cs" />
+    <Compile Include="Circus\ArcPCK.cs" />
     <Compile Include="Cmvs\ArcCPZ.cs" />
     <Compile Include="ArcPBX.cs" />
     <Compile Include="Banana\ArcPK.cs" />

ArcFormats/Circus/ArcPCK.cs

@@ -0,0 +1,78 @@
+//! \file       ArcPCK.cs
+//! \date       Fri Feb 05 16:01:26 2016
+//! \brief      Circus 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;
+
+namespace GameRes.Formats.Circus
+{
+    [Export(typeof(ArchiveFormat))]
+    public class PckOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PCK/CIRCUS"; } }
+        public override string Description { get { return "Circus resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public PckOpener ()
+        {
+            Extensions = new string[] { "pck" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+            int index_size = count * 0x48 + 4;
+            uint first_offset = file.View.ReadUInt32 (4);
+            if (first_offset < index_size || first_offset >= file.MaxOffset)
+                return null;
+            int index_offset = 4 + count * 8;
+            file.View.Reserve (index_offset, (uint)count * 0x40);
+            if (first_offset != file.View.ReadUInt32 (index_offset+0x38))
+                return null;
+
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, 0x38);
+                if (0 == name.Length)
+                    return null;
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset+0x38);
+                entry.Size   = file.View.ReadUInt32 (index_offset+0x3C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x40;
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}

supported.html

@@ -390,10 +390,12 @@ Soshite Ashita no Sekai yori<br/>
 </td></tr>
 <tr><td>*.b</td><td><tt>ABMP7</tt><br/><tt>abmp10</tt><br/><tt>abmp11</tt></td><td>No</td></tr>
 <tr><td>*.png</td><td><tt>DPNG</tt></td><td>No</td></tr>
-<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td rowspan="3">Circus</td><td rowspan="3">
+<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td rowspan="4">Circus</td><td rowspan="4">
 Infantaria XP<br/>
 Maid no Yakata ~Zetsubou Hen~<br/>
+RPG Gakuen<br/>
 </td></tr>
+<tr class="odd"><td>*.pck</td><td>-</td><td>No</td></tr>
 <tr class="odd"><td>*.crx</td><td><tt>CRXG</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.pcm</td><td><tt>XPCM</tt></td><td>No</td></tr>
 <tr><td>*.pak</td><td><tt>CHERRY PACK 2.0</tt><br/><tt>CHERRY PACK 3.0</tt><br/>-</td><td>No</td><td>Cherry</td><td>