From 11b6b12f078eaa953dd7778e29221a6c4c2f352a Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Wed, 27 May 2015 13:58:00 +0400
Subject: [PATCH] FPK archives implementation.

---
 ArcFormats/ArcFPK.cs | 162 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 ArcFormats/ArcFPK.cs

diff --git a/ArcFormats/ArcFPK.cs b/ArcFormats/ArcFPK.cs
new file mode 100644
index 00000000..3cb2fbe0
--- /dev/null
+++ b/ArcFormats/ArcFPK.cs
@@ -0,0 +1,162 @@
+//! \file       ArcFPK.cs
+//! \date       Mon May 25 10:01:24 2015
+//! \brief      FPK resource 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 GameRes.Utility;
+
+namespace GameRes.Formats.CandySoft
+{
+    [Export(typeof(ArchiveFormat))]
+    public class FpkOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "FPK"; } }
+        public override string Description { get { return "Candy Soft resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (count <= 0 || count > 0xfffff)
+                return null;
+            long index_offset = 4;
+            uint index_size = (uint)(0x18 * count);
+            if (index_size > file.View.Reserve (index_offset, index_size))
+                return null;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                string name = file.View.ReadString (index_offset+8, 0x10);
+                var entry = FormatCatalog.Instance.CreateEntry (name);
+                entry.Offset = file.View.ReadUInt32 (index_offset);
+                entry.Size   = file.View.ReadUInt32 (index_offset+4);
+                if (entry.Offset < index_size || !entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 0x18;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            if (entry.Size <= 8)
+                return input;
+            var sign = FormatCatalog.ReadSignature (input);
+            if (0x32434c5a != sign) // 'ZLC2'
+            {
+                input.Position = 0;
+                return input;
+            }
+            using (input)
+            using (var reader = new Zlc2Reader (input, (int)entry.Size))
+            {
+                reader.Unpack();
+                return new MemoryStream (reader.Data);
+            }
+        }
+    }
+
+    internal class Zlc2Reader : IDisposable
+    {
+        BinaryReader    m_input;
+        byte[]          m_output;
+        int             m_size;
+
+        public byte[] Data { get { return m_output; } }
+
+        public Zlc2Reader (Stream input, int input_length)
+        {
+            input.Position = 4;
+            m_input = new ArcView.Reader (input);
+            uint output_length = m_input.ReadUInt32();
+            m_output = new byte[output_length];
+            m_size = input_length - 8;
+        }
+
+        public void Unpack ()
+        {
+            int remaining = m_size;
+            int dst = 0;
+            while (remaining > 0 && dst < m_output.Length)
+            {
+                int ctl = m_input.ReadByte();
+                remaining--;
+                for (int mask = 0x80; mask != 0 && remaining > 0 && dst < m_output.Length; mask >>= 1)
+                {
+                    if (0 != (ctl & mask))
+                    {
+                        if (remaining < 2)
+                            return;
+
+                        int offset = m_input.ReadByte();
+                        int count  = m_input.ReadByte();
+                        offset |= (count & 0xF0) << 4;
+                        count   = (count & 0x0F) + 3;
+
+                        if (0 == offset)
+                            offset = 4096;
+                        if (dst + count > m_output.Length)
+                            count = m_output.Length - dst;
+
+                        Binary.CopyOverlapped (m_output, dst-offset, dst, count);
+                        dst += count;
+                    }
+                    else
+                    {
+                        m_output[dst++] = m_input.ReadByte();
+                    }
+                }
+            }
+        }
+
+        #region IDisposable Members
+        bool disposed = false;
+
+        public void Dispose ()
+        {
+            Dispose (true);
+            GC.SuppressFinalize (this);
+        }
+
+        protected virtual void Dispose (bool disposing)
+        {
+            if (!disposed)
+            {
+                if (disposing)
+                {
+                    m_input.Dispose();
+                }
+                disposed = true;
+            }
+        }
+        #endregion
+    }
+}