implemented PCS archives.

ArcFormats/ArcFormats.csproj

@@ -82,6 +82,7 @@
     <Compile Include="CatSystem\ImageHG2.cs" />
     <Compile Include="Cmvs\CmvsMD5.cs" />
     <Compile Include="Cmvs\ImagePB3.cs" />
+    <Compile Include="CsWare\ArcPCS.cs" />
     <Compile Include="DenSDK\ArcDAF.cs" />
     <Compile Include="elf\ArcVSD.cs" />
     <Compile Include="Entis\ErisaNemesis.cs" />
@@ -545,9 +546,7 @@
     </EmbeddedResource>
     <EmbeddedResource Include="Strings\arcStrings.ru-RU.resx" />
   </ItemGroup>
-  <ItemGroup>
+  <ItemGroup />
-    <Folder Include="CsWare\" />
-  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>perl "$(SolutionDir)inc-revision.pl" "$(ProjectPath)" $(ConfigurationName)

ArcFormats/CsWare/ArcPCS.cs

@@ -0,0 +1,151 @@
+//! \file       ArcPCS.cs
+//! \date       Mon Jan 25 01:36:53 2016
+//! \brief      C's ware 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.Utility;
+
+namespace GameRes.Formats.CsWare
+{
+    internal class PcsEntry : Entry
+    {
+        public byte Key;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class PcsOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PCS"; } }
+        public override string Description { get { return "C's ware resource archive"; } }
+        public override uint     Signature { get { return 0x53434350; } } // 'PCCS'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int version = file.View.ReadUInt16 (4);
+            if (version < 1 || version > 4)
+                return null;
+            int count = file.View.ReadInt32 (8);
+            if (!IsSaneCount (count))
+                return null;
+            uint data_offset = file.View.ReadUInt32 (12);
+            int index_size = (int)data_offset - 0x10;
+
+            int index_offset = 0x10;
+            var index_buffer = new byte[0x40];
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                int name_length;
+                if (version > 1)
+                {
+                    name_length = file.View.ReadInt32 (index_offset);
+                    if (0 == name_length)
+                        break;
+                    if (name_length > index_size)
+                        return null;
+                    index_offset += 5 + name_length;
+                }
+                name_length = file.View.ReadInt32 (index_offset);
+                if (0 == name_length)
+                    break;
+                if (name_length > index_size)
+                    return null;
+                if (name_length > index_buffer.Length)
+                    index_buffer = new byte[name_length];
+                file.View.Read (index_offset+5, index_buffer, 0, (uint)name_length);
+                index_offset += 5 + name_length;
+                byte checksum;
+                var name = DecryptName (index_buffer, name_length, out checksum);
+                Entry entry;
+                if (4 == version)
+                {
+                    entry = FormatCatalog.Instance.Create<PcsEntry> (name);
+                    (entry as PcsEntry).Key = checksum;
+                    int c = -1 - checksum;
+                    file.View.Read (index_offset, index_buffer, 0, 8);
+                    for (int j = 0; j < 4; ++j)
+                    {
+                        byte key = (byte)((checksum + (17 << j)) & 0x33);
+                        index_buffer[j]   = (byte)(c + key - index_buffer[j]);
+                        index_buffer[j+4] = (byte)(c + key - index_buffer[j+4]);
+                    }
+                    entry.Offset = LittleEndian.ToUInt32 (index_buffer, 0);
+                    entry.Size   = LittleEndian.ToUInt32 (index_buffer, 4);
+                }
+                else
+                {
+                    entry = FormatCatalog.Instance.Create<Entry> (name);
+                    entry.Offset = file.View.ReadUInt32 (index_offset);
+                    entry.Size   = file.View.ReadUInt32 (index_offset+4);
+                }
+                index_offset += 0x10;
+                if (index_offset > data_offset)
+                    return null;
+                entry.Offset += data_offset;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+            }
+            if (0 == dir.Count)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var pent = entry as PcsEntry;
+            if (null == pent)
+                return base.OpenEntry (arc, entry);
+            uint header_size = Math.Min (entry.Size, 512u);
+            var header = arc.File.View.ReadBytes (entry.Offset, header_size);
+            for (int i = 0; i < header.Length; ++i)
+            {
+                header[i] = (byte)(pent.Key - header[i] - 1);
+            }
+            if (header_size == entry.Size)
+                return new MemoryStream (header);
+            var rest = arc.File.CreateStream (entry.Offset+512, entry.Size-512);
+            return new PrefixStream (header, rest);
+        }
+
+        string DecryptName (byte[] name_buffer, int length, out byte checksum)
+        {
+            int count;
+            checksum = 0;
+            for (count = 0; count < length; ++count)
+            {
+                if (0 == name_buffer[count])
+                    break;
+                name_buffer[count] = Binary.RotByteL (name_buffer[count], 4);
+                checksum += name_buffer[count];
+            }
+            return Encodings.cp932.GetString (name_buffer, 0, count);
+        }
+    }
+}

supported.html

@@ -237,6 +237,7 @@ Hensai Keikaku<br/>
 Himawari Oka Sougou Byouin e Youkoso<br/>
 Inen no Yakata<br/>
 Inran OL Sawatari Tokiko<br/>
+Itsuwari no Kyoushitsu<br/>
 Kunoichi Kikyou ~Gensou Kannou Emaki~<br/>
 Momo x Momi<br/>
 Michibikareshi Mono-tachi no Rakuen ~BEDLAM~<br/>
@@ -358,6 +359,7 @@ Dungeon Crusaderz 2 ~Eigou no Rakudo~<br/>
 Onna Kyoushi<br/>
 Magical Witch Academy<br/>
 Medorei ~Okasareta Houkago~<br/>
+Nerawareta Megami Tenshi Angeltia<br/>
 Saishuu Chikan Densha<br/>
 Serina<br/>
 Ura Nyuugaku ~Ineki ni Nureta Kyoukasho~<br/>
@@ -377,6 +379,7 @@ Ryoujoku Gojuusou<br/>
 <tr class="odd"><td>*.eog</td><td><tt>CRM</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.zbm<br/>*.cwl</td><td><tt>SZDD</tt></td><td>No</td></tr>
 <tr><td>*.pack</td><td><tt>FilePackVer1.0</tt><br/><tt>FilePackVer2.0</tt><br/><tt>FilePackVer3.0</tt></td><td>No</td><td rowspan="3">QLIE</td><td rowspan="3">
+Makai Tenshi Djibril -episode 3-<br/>
 Mehime no Toriko<br/>
 Nanatsu no Fushigi no Owaru Toki<br/>
 Soshite Ashita no Sekai yori<br/>
@@ -636,6 +639,9 @@ Dokidoki Onee-san<br/>
 </td></tr>
 <tr class="odd"><td>*.alp</td><td><tt>AP-2</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.anm</td><td><tt>AN00</tt></td><td>No</td></tr>
+<tr><td>*.pcs</td><td><tt>PCCS</tt></td><td>No</td><td>C's ware</td><td>
+Mikan<br/>
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>