implemented 'WARC 1.0' archives.

ArcFormats/ArcFormats.csproj

@@ -153,6 +153,7 @@
     <Compile Include="Scoop\ArcGX.cs" />
     <Compile Include="Seraphim\ArcSCN.cs" />
     <Compile Include="Seraphim\ArcVoice.cs" />
+    <Compile Include="ShiinaRio\ArcWARC1.0.cs" />
     <Compile Include="Silky\ImageGRD.cs" />
     <Compile Include="Slg\ArcSPD.cs" />
     <Compile Include="Software House Parsley\ArcCG.cs" />

ArcFormats/ShiinaRio/ArcWARC1.0.cs

@@ -0,0 +1,178 @@
+//! \file       ArcWARC1.0.cs
+//! \date       2017 Dec 09
+//! \brief      Forest archive format.
+//
+// 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Forest
+{
+    /// <summary>
+    /// ShiinaRio WARC archives predecessor.
+    /// </summary>
+    [Export(typeof(ArchiveFormat))]
+    public class War0Opener : ArchiveFormat
+    {
+        public override string         Tag { get { return "WAR/1.0"; } }
+        public override string Description { get { return "Forest resource archive"; } }
+        public override uint     Signature { get { return 0x43524157; } } // 'WARC'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, " 1.0"))
+                return null;
+            uint index_offset = file.View.ReadUInt32 (8);
+            if (index_offset >= file.MaxOffset)
+                return null;
+            var index = file.View.ReadBytes (index_offset, 0xC000);
+            int count = index.Length / 0x18;
+            if (!IsSaneCount (count))
+                return null;
+            for (int i = 0; i < index.Length; i += 2)
+            {
+                index[i  ] ^= 0xFE;
+                index[i+1] ^= 0xE5;
+            }
+            int pos = 0;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = Binary.GetCString (index, pos, 0x10);
+                var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
+                entry.Offset = index.ToUInt32 (pos+0x10);
+                entry.Size   = index.ToUInt32 (pos+0x14);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                entry.UnpackedSize = entry.Size;
+                dir.Add (entry);
+                pos += 0x18;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var pent = entry as PackedEntry;
+            if (null == pent)
+                return base.OpenEntry (arc, entry);
+            if (!pent.IsPacked)
+            {
+                if (!arc.File.View.AsciiEqual (entry.Offset, "Ylz"))
+                    return base.OpenEntry (arc, entry);
+                pent.IsPacked = true;
+                pent.UnpackedSize = arc.File.View.ReadUInt32 (entry.Offset+4);
+            }
+            var data = arc.File.View.ReadBytes (entry.Offset+8, entry.Size-8);
+            var reader = new Ylz16Reader (data);
+            data = reader.Unpack ((int)pent.UnpackedSize);
+            return new BinMemoryStream (data, entry.Name);
+        }
+    }
+
+    internal sealed class Ylz16Reader
+    {
+        byte[]      m_input;
+
+        public Ylz16Reader (byte[] input)
+        {
+            m_input = input;
+            DecryptInput();
+        }
+
+        void DecryptInput ()
+        {
+            for (int i = 0; i < m_input.Length; ++i)
+                m_input[i] ^= 0xE6;
+        }
+
+        int GetCtlBit ()
+        {
+            int bit = m_ctl & 1;
+            m_ctl >>= 1;
+            if (--m_bit_count <= 0)
+            {
+                m_ctl = LittleEndian.ToUInt16 (m_input, m_src);
+                m_src += 2;
+                m_bit_count = 16;
+            }
+            return bit;
+        }
+
+        int     m_ctl;
+        int     m_bit_count;
+        int     m_src;
+
+        public byte[] Unpack (int unpacked_size)
+        {
+            m_src = 0;
+            m_bit_count = 0;
+            GetCtlBit();
+            var output = new byte[unpacked_size];
+            int dst = 0;
+            while (dst < unpacked_size)
+            {
+                if (GetCtlBit() != 0)
+                {
+                    output[dst++] = m_input[m_src++];
+                }
+                else
+                {
+                    int offset, count;
+                    if (GetCtlBit() == 0)
+                    {
+                        count  = GetCtlBit() << 1;
+                        count |= GetCtlBit();
+                        count += 2;
+                        offset = m_input[m_src++] | -0x100;
+                    }
+                    else
+                    {
+                        byte lo = m_input[m_src++];
+                        byte hi = m_input[m_src++];
+                        offset = lo | (hi & ~7) << 5 | -0x2000;
+                        count = hi & 7;
+                        if (0 == count)
+                        {
+                            count = m_input[m_src++];
+                            if (0 == count)
+                                break;
+                            count += 9;
+                        }
+                        else
+                        {
+                            count += 2;
+                        }
+                    }
+                    Binary.CopyOverlapped (output, dst + offset, dst, count);
+                    dst += count;
+                }
+            }
+            return output;
+        }
+    }
+}