From e9102844bca58843bfe7c194e94585dd3abcaf4c Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Sun, 7 Jan 2018 01:33:26 +0400
Subject: [PATCH] (Legacy): implemented NCL archives.

---
 Legacy/Uran/ArcNCL.cs | 135 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 Legacy/Uran/ArcNCL.cs

diff --git a/Legacy/Uran/ArcNCL.cs b/Legacy/Uran/ArcNCL.cs
new file mode 100644
index 00000000..d04894fd
--- /dev/null
+++ b/Legacy/Uran/ArcNCL.cs
@@ -0,0 +1,135 @@
+//! \file       ArcNCL.cs
+//! \date       2018 Jan 05
+//! \brief      Uran 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;
+using GameRes.Compression;
+
+namespace GameRes.Formats.Uran
+{
+    internal class NclEntry : PackedEntry
+    {
+        public byte     Method;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class NclOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "NCL"; } }
+        public override string Description { get { return "Uran 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)
+        {
+            if (!file.Name.HasExtension (".ncl") || file.MaxOffset > uint.MaxValue)
+                return null;
+            long offset = 0;
+            var dir = new List<Entry>();
+            while (offset < file.MaxOffset)
+            {
+                uint size = file.View.ReadUInt32 (offset);
+                if (0 == size)
+                    break;
+                uint unpacked_size = file.View.ReadUInt32 (offset+4);
+                uint name_length = file.View.ReadUInt16 (offset+8);
+                if (0 == name_length || name_length > 0x100)
+                    return null;
+                var name = file.View.ReadString (offset+10, name_length);
+                offset += 10 + name_length;
+                var entry = FormatCatalog.Instance.Create<NclEntry> (name);
+                entry.Size = size;
+                entry.UnpackedSize = unpacked_size;
+                uint header_size = file.View.ReadUInt16 (offset+4);
+                offset += 6 + header_size;
+                entry.Offset = offset;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                entry.Method = (byte)(file.View.ReadByte (offset) - 10);
+                entry.IsPacked = entry.Method != 1;
+                entry.Offset++;
+                entry.Size--;
+                dir.Add (entry);
+                offset += size;
+            }
+            if (0 == dir.Count)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
+            input = new NclSubStream (input, 10);
+            var nclent = entry as NclEntry;
+            if (nclent != null && nclent.IsPacked)
+            {
+                if (2 == nclent.Method)
+                    input = new ZLibStream (input, CompressionMode.Decompress);
+                else if (3 == nclent.Method)
+                {
+                    // XXX bzip2 compression not implemented
+                }
+            }
+            return input;
+        }
+    }
+
+    public class NclSubStream : InputProxyStream
+    {
+        private byte        m_key;
+
+        public NclSubStream (Stream stream, byte key, bool leave_open = false)
+            : base (stream, leave_open)
+        {
+            m_key = key;
+        }
+
+        #region System.IO.Stream methods
+        public override int Read (byte[] buffer, int offset, int count)
+        {
+            int read = BaseStream.Read (buffer, offset, count);
+            for (int i = 0; i < read; ++i)
+            {
+                buffer[offset+i] -= m_key;
+            }
+            return read;
+        }
+
+        public override int ReadByte ()
+        {
+            int b = BaseStream.ReadByte();
+            if (-1 != b)
+            {
+                b -= m_key;
+            }
+            return b;
+        }
+        #endregion
+    }
+}