implemented ESC-ARC archives.

ArcFormats/ArcFormats.csproj

@@ -75,6 +75,7 @@
     <Compile Include="Cmvs\CmvsMD5.cs" />
     <Compile Include="Cmvs\ImagePB3.cs" />
     <Compile Include="elf\ArcVSD.cs" />
+    <Compile Include="Escude\ArcBIN.cs" />
     <Compile Include="Eushully\ArcGPC.cs" />
     <Compile Include="Eushully\ImageGP.cs" />
     <Compile Include="Favorite\ArcBIN.cs" />

ArcFormats/Escude/ArcBIN.cs

@@ -0,0 +1,145 @@
+//! \file       ArcBIN.cs
+//! \date       Sat Dec 19 06:16:35 2015
+//! \brief      Escu:de 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 GameRes.Utility;
+
+namespace GameRes.Formats.Escude
+{
+    [Export(typeof(ArchiveFormat))]
+    public class BinOpener : FVP.BinOpener
+    {
+        public override string         Tag { get { return "BIN/ESC-ARC"; } }
+        public override string Description { get { return "Escu:de resource archive"; } }
+        public override uint     Signature { get { return 0x2D435345; } } // 'ESC-'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "ARC"))
+                return null;
+            int version = file.View.ReadByte (7) - '0';
+            var reader = new IndexReader (file);
+            List<Entry> dir = null;
+            if (1 == version)
+                dir = reader.ReadIndexV1();
+            else if (2 == version)
+                dir = reader.ReadIndexV2();
+            if (null == dir)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+    }
+
+    internal sealed class IndexReader
+    {
+        ArcView   m_file;
+        uint      m_seed;
+        uint      m_count;
+
+        public IndexReader (ArcView file)
+        {
+            m_file = file;
+            m_seed = m_file.View.ReadUInt32 (8);
+            m_count = file.View.ReadUInt32 (0xC) ^ NextKey();
+        }
+
+        public List<Entry> ReadIndexV1 ()
+        {
+            if (!ArchiveFormat.IsSaneCount ((int)m_count))
+                return null;
+            uint index_size = m_count * 0x88;
+            var index = m_file.View.ReadBytes (0x10, index_size);
+            if (index.Length != index_size)
+                return null;
+            Decrypt (index);
+            int index_offset = 0;
+            var dir = new List<Entry> ((int)m_count);
+            for (uint i = 0; i < m_count; ++i)
+            {
+                var name = Binary.GetCString (index, index_offset, 0x80);
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = LittleEndian.ToUInt32 (index, index_offset+0x80);
+                entry.Size   = LittleEndian.ToUInt32 (index, index_offset+0x84);
+                if (!entry.CheckPlacement (m_file.MaxOffset))
+                    return null;
+                index_offset += 0x88;
+                dir.Add (entry);
+            }
+            return dir;
+        }
+
+        public List<Entry> ReadIndexV2 ()
+        {
+            if (!ArchiveFormat.IsSaneCount ((int)m_count))
+                return null;
+
+            uint names_size = m_file.View.ReadUInt32 (0x10) ^ NextKey();
+            uint index_size = m_count * 12;
+            var index = m_file.View.ReadBytes (0x14, index_size);
+            if (index.Length != index_size)
+                return null;
+            Decrypt (index);
+            int index_offset = 0;
+            uint filenames_base = 0x14 + index_size;
+            var dir = new List<Entry> ((int)m_count);
+            for (uint i = 0; i < m_count; ++i)
+            {
+                uint filename_offset = LittleEndian.ToUInt32 (index, index_offset);
+                var name = m_file.View.ReadString (filenames_base+filename_offset, names_size-filename_offset);
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = LittleEndian.ToUInt32 (index, index_offset+4);
+                entry.Size   = LittleEndian.ToUInt32 (index, index_offset+8);
+                if (!entry.CheckPlacement (m_file.MaxOffset))
+                    return null;
+                index_offset += 12;
+                dir.Add (entry);
+            }
+            return dir;
+        }
+
+        unsafe void Decrypt (byte[] data)
+        {
+            fixed (byte* raw = data)
+            {
+                uint* data32 = (uint*)raw;
+                for (int i = data.Length/4; i > 0; --i)
+                {
+                    *data32++ ^= NextKey();
+                }
+            }
+        }
+
+        uint NextKey ()
+        {
+            m_seed ^= 0x65AC9365;
+            m_seed ^= (((m_seed >> 1) ^ m_seed) >> 3)
+                    ^ (((m_seed << 1) ^ m_seed) << 3);
+            return m_seed;
+        }
+    }
+}