From 4d8c9a159d9a5208e2ceceff11dceec42a72c7dd Mon Sep 17 00:00:00 2001
From: morkt <morkt@users.noreply.github.com>
Date: Wed, 12 Sep 2018 15:29:43 +0400
Subject: [PATCH] (Legacy): Mink GRP archives.

---
 Legacy/Mink/ArcMINK.cs | 102 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Legacy/Mink/ArcMINK.cs

diff --git a/Legacy/Mink/ArcMINK.cs b/Legacy/Mink/ArcMINK.cs
new file mode 100644
index 00000000..6173932a
--- /dev/null
+++ b/Legacy/Mink/ArcMINK.cs
@@ -0,0 +1,102 @@
+//! \file       ArcMINK.cs
+//! \date       2018 Feb 01
+//! \brief      Mink resource archive.
+//
+// Copyright (C) 2018 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;
+
+// [000623][Mink] Lovely Angels Peropero Candy 2
+
+namespace GameRes.Formats.Mink
+{
+    [Export(typeof(ArchiveFormat))]
+    public class GrpOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "GRP/MINK"; } }
+        public override string Description { get { return "Mink resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public GrpOpener ()
+        {
+            Extensions = new string[] { "" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+            uint index_offset = file.View.ReadUInt32 (4);
+            if (index_offset < 8 || index_offset>= file.MaxOffset)
+                return null;
+
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, 0x18);
+                if (string.IsNullOrWhiteSpace (name))
+                    return null;
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset+0x18);
+                entry.Size   = file.View.ReadUInt32 (index_offset+0x1C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x20;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            if (!entry.Name.HasExtension (".MSC") || !arc.File.View.AsciiEqual (entry.Offset, "MADSCR"))
+                return base.OpenEntry (arc, entry);
+            var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
+            ushort id = data.ToUInt16 (8);
+            byte key;
+            if (KnownScriptKeys.TryGetValue (id, out key))
+            {
+                for (int i = 0x20; i < data.Length; ++i)
+                    data[i] ^= key;
+            }
+            return new BinMemoryStream (data, entry.Name);
+        }
+
+        static readonly Dictionary<ushort, byte> KnownScriptKeys = new Dictionary<ushort, byte> {
+            { 0x7E83, 0x66 },
+            { 0x9383, 0x77 },
+            { 0x4E83, 0x88 },
+            { 0xBE82, 0x99 },
+            { 0xA282, 0xAA },
+            { 0xCE82, 0xBB },
+            { 0xAD82, 0xCC },
+            { 0xCD82, 0xDD },
+            { 0xC282, 0xEE },
+        };
+    }
+}