From c346681e49a58ed4942c86b5f7621180cf410ddb Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Fri, 11 Nov 2016 17:30:49 +0400
Subject: [PATCH] implemented YaneSDK archives.

---
 ArcFormats/ArcFormats.csproj |  1 +
 ArcFormats/YaneSDK/ArcDAT.cs | 92 ++++++++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 ArcFormats/YaneSDK/ArcDAT.cs

diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 9a5e8763..f08d931c 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -457,6 +457,7 @@
     <Compile Include="Xuse\ArcWAG.cs" />
     <Compile Include="Xuse\ArcXARC.cs" />
     <Compile Include="Xuse\ArcXuse.cs" />
+    <Compile Include="YaneSDK\ArcDAT.cs" />
     <Compile Include="Yox\ArcYOX.cs" />
     <Compile Include="Yuka\ArcYKC.cs" />
     <Compile Include="BlackCyc\AudioVAW.cs" />
diff --git a/ArcFormats/YaneSDK/ArcDAT.cs b/ArcFormats/YaneSDK/ArcDAT.cs
new file mode 100644
index 00000000..4140dabe
--- /dev/null
+++ b/ArcFormats/YaneSDK/ArcDAT.cs
@@ -0,0 +1,92 @@
+//! \file       ArcDAT.cs
+//! \date       Thu Nov 10 14:53:03 2016
+//! \brief      YaneSDK 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.YaneSDK
+{
+    internal class YaneEntry : Entry
+    {
+        public uint EncryptedSize;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class PakOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "DAT/YaneSDK"; } }
+        public override string Description { get { return "YaneSDK engine resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = (short)(file.View.ReadUInt16 (0) ^ 0x8080);
+            if (!IsSaneCount (count))
+                return null;
+
+            using (var input = file.CreateStream())
+            using (var dec = new XoredStream (input, 0x80))
+            using (var index = new BinaryReader (dec))
+            {
+                index.BaseStream.Position = 2;
+                var name_buf = new byte[0x22];
+                var dir = new List<Entry> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    if (0x22 != index.Read (name_buf, 0, 0x22))
+                        return null;
+                    var name = Binary.GetCString (name_buf, 0);
+                    var entry = FormatCatalog.Instance.Create<YaneEntry> (name);
+                    entry.EncryptedSize = index.ReadUInt16();
+                    entry.Size = index.ReadUInt32();
+                    entry.Offset = index.ReadUInt32();
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                }
+                return new ArcFile (file, this, dir);
+            }
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var yent = entry as YaneEntry;
+            if (null == yent || 0 == yent.EncryptedSize)
+                return base.OpenEntry (arc, entry);
+            var header = arc.File.View.ReadBytes (yent.Offset, yent.EncryptedSize);
+            for (int i = 0; i < header.Length; ++i)
+                header[i] ^= 0x80;
+            if (yent.EncryptedSize >= yent.Size)
+                return new BinMemoryStream (header);
+            var rest = arc.File.CreateStream (yent.Offset + yent.EncryptedSize, yent.Size - yent.EncryptedSize);
+            return new PrefixStream (header, rest);
+        }
+    }
+}