From c748a1668588db0dc9111ec0d675573fdeca2714 Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Wed, 1 Feb 2017 16:35:19 +0400
Subject: [PATCH] implemented ARCG archives.

---
 ArcFormats/Tanaka/ArcARCG.cs | 105 +++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 ArcFormats/Tanaka/ArcARCG.cs

diff --git a/ArcFormats/Tanaka/ArcARCG.cs b/ArcFormats/Tanaka/ArcARCG.cs
new file mode 100644
index 00000000..5ed9b804
--- /dev/null
+++ b/ArcFormats/Tanaka/ArcARCG.cs
@@ -0,0 +1,105 @@
+//! \file       ArcARCG.cs
+//! \date       Wed Feb 01 06:41:10 2017
+//! \brief      Archive format by Tanaka Tatsuhiro.
+//
+// Copyright (C) 2017 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.Linq;
+
+namespace GameRes.Formats.Will
+{
+    [Export(typeof(ArchiveFormat))]
+    public class ArcGOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ARCG"; } }
+        public override string Description { get { return "Tanaka Tatsuhiro's engine resource archive"; } }
+        public override uint     Signature { get { return 0x47435241; } } // 'ARCG'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public ArcGOpener ()
+        {
+            Extensions = new string[] { "arc", "bmx", "scb", "vpk" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (0x10000 != file.View.ReadUInt32 (4))
+                return null;
+            uint index_offset = file.View.ReadUInt32 (8);
+            uint index_size   = file.View.ReadUInt32 (0xC);
+            int dir_count = file.View.ReadUInt16 (0x10);
+            int count = file.View.ReadInt32 (0x12);
+            if (!IsSaneCount (count) || index_offset >= file.MaxOffset
+                || index_size > file.View.Reserve (index_offset, index_size))
+                return null;
+
+            var dir = new List<Entry> (count);
+            for (int j = 0; j < dir_count; ++j)
+            {
+                uint name_length = file.View.ReadByte (index_offset);
+                var dir_name = file.View.ReadString (index_offset+1, name_length-1);
+                index_offset += name_length; 
+                uint dir_offset = file.View.ReadUInt32 (index_offset);
+                int file_count = file.View.ReadInt32 (index_offset+4);
+                if (dir_offset >= file.MaxOffset || file_count < 0 || file_count > count)
+                    return null;
+                index_offset += 8;
+                for (int i = 0; i < file_count; ++i)
+                {
+                    name_length = file.View.ReadByte (dir_offset);
+                    if (0 == name_length)
+                        return null;
+                    var file_name = file.View.ReadString (dir_offset+1, name_length-1);
+                    file_name = file_name.Replace ('?', '？');
+                    dir_offset += name_length;
+                    file_name = Path.Combine (dir_name, file_name);
+                    var entry = FormatCatalog.Instance.Create<Entry> (file_name);
+                    entry.Offset = file.View.ReadUInt32 (dir_offset);
+                    entry.Size   = file.View.ReadUInt32 (dir_offset+4);
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir_offset += 8;
+                    dir.Add (entry);
+                }
+            }
+            foreach (var entry in dir.Where (e => string.IsNullOrEmpty (e.Type)))
+            {
+                uint signature = file.View.ReadUInt32 (entry.Offset);
+                IResource res;
+                if ((signature & 0xFFFF) == 0x4342) // 'BC'
+                    res = BcFormat.Value;
+                else
+                    res = AutoEntry.DetectFileType (signature);
+                if (res != null)
+                    entry.Type = res.Type;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        internal static Lazy<ImageFormat> BcFormat = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("BC"));
+    }
+}