From 5f8fd31d20ebe8c5f6cc4a7c2fad83f6914f8a2b Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Sun, 29 Nov 2015 05:30:28 +0400
Subject: [PATCH] implemented Pulltop ARC archives (#12).

---
 ArcFormats/ArcFormats.csproj  |   1 +
 ArcFormats/Will/ArcPulltop.cs | 108 ++++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+)
 create mode 100644 ArcFormats/Will/ArcPulltop.cs

diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index a63c8b67..6dc64f51 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -203,6 +203,7 @@
     <Compile Include="ShiinaRio\ArcS25.cs" />
     <Compile Include="ArcSAF.cs" />
     <Compile Include="BlackCyc\ArcVPK.cs" />
+    <Compile Include="Will\ArcPulltop.cs" />
     <Compile Include="Xuse\ArcWAG.cs" />
     <Compile Include="Xuse\ArcXuse.cs" />
     <Compile Include="Yuka\ArcYKC.cs" />
diff --git a/ArcFormats/Will/ArcPulltop.cs b/ArcFormats/Will/ArcPulltop.cs
new file mode 100644
index 00000000..d416b5ae
--- /dev/null
+++ b/ArcFormats/Will/ArcPulltop.cs
@@ -0,0 +1,108 @@
+//! \file       ArcPulltop.cs
+//! \date       Sun Nov 29 04:43:52 2015
+//! \brief      Pulltop archives implementation.
+//
+// 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;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Text;
+
+namespace GameRes.Formats.Will
+{
+    [Export(typeof(ArchiveFormat))]
+    public class Arc2Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ARC/WillV2"; } }
+        public override string Description { get { return "Will Co. game engine resource archive v2"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public Arc2Opener ()
+        {
+            Extensions = new string[] { "arc" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+            uint index_offset = 8;
+            uint index_size = file.View.ReadUInt32 (4);
+            uint base_offset = index_offset + index_size;
+            if (index_size > base_offset || base_offset >= file.MaxOffset)
+                return null;
+            file.View.Reserve (index_offset, index_size);
+
+            var dir = new List<Entry> (count);
+            var name_buffer = new StringBuilder (0x40);
+            for (int i = 0; i < count; ++i)
+            {
+                if (index_offset >= base_offset)
+                    return null;
+                uint size = file.View.ReadUInt32 (index_offset);
+                long offset = (long)base_offset + file.View.ReadUInt32 (index_offset+4);
+                index_offset += 8;
+                name_buffer.Clear();
+                for (;;)
+                {
+                    if (index_offset >= base_offset)
+                        return null;
+                    char c = (char)file.View.ReadUInt16 (index_offset);
+                    index_offset += 2;
+                    if (0 == c)
+                        break;
+                    name_buffer.Append (c);
+                }
+                if (0 == name_buffer.Length)
+                    return null;
+                var name = name_buffer.ToString();
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = offset;
+                entry.Size = size;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+            }
+            if (index_offset != base_offset)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            if (!entry.Name.EndsWith (".ws2", StringComparison.InvariantCultureIgnoreCase))
+                return base.OpenEntry (arc, entry);
+            var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
+            for (int i = 0; i < data.Length; ++i)
+            {
+                byte b = data[i];
+                data[i] = (byte)(b >> 2 | b << 6);
+            }
+            return new MemoryStream (data);
+        }
+    }
+}