implemented 'GML_ARC' archives.

ArcFormats/ArcFormats.csproj

@@ -166,6 +166,7 @@
     <Compile Include="FC01\ImageWM2.cs" />
     <Compile Include="FC01\ImageWMK.cs" />
     <Compile Include="FrontWing\ArcVAV.cs" />
+    <Compile Include="GLib\ArcG.cs" />
     <Compile Include="Groover\ArcPCG.cs" />
     <Compile Include="Gss\ArcARC.cs" />
     <Compile Include="HCSystem\ArcPAK.cs" />

ArcFormats/GLib/ArcG.cs

@@ -0,0 +1,156 @@
+//! \file       ArcG.cs
+//! \date       2018 Jul 10
+//! \brief      GLib engine 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;
+
+namespace GameRes.Formats.GLib
+{
+    internal class GmlArchive : ArcFile
+    {
+        public readonly byte[] Key;
+
+        public GmlArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] key)
+            : base (arc, impl, dir)
+        {
+            Key = key;
+        }
+    }
+
+    internal class GmlEntry : Entry
+    {
+        public byte[] Header;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class GOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "G/GML"; } }
+        public override string Description { get { return "GLib engine resource archive"; } }
+        public override uint     Signature { get { return 0x5F4C4D47; } } // 'GML_'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public GOpener ()
+        {
+            Extensions = new string[] { "g", "xp" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "ARC\0"))
+                return null;
+            uint data_offset   = file.View.ReadUInt32 (8);
+            uint unpacked_size = file.View.ReadUInt32 (0xC);
+            uint packed_size   = file.View.ReadUInt32 (0x10);
+            byte[] unpacked = new byte[unpacked_size];
+            using (var packed = file.CreateStream (0x14, packed_size))
+            using (var input = new XoredStream (packed, 0xFF))
+            {
+                LzssUnpack (input, unpacked);
+            }
+            using (var index = new BinMemoryStream (unpacked))
+            {
+                var key = index.ReadBytes (256);
+                int count = index.ReadInt32();
+                if (!IsSaneCount (count))
+                    return null;
+                var dir = new List<Entry> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    int name_length = index.ReadInt32();
+                    var name = index.ReadCString (name_length);
+                    var entry = FormatCatalog.Instance.Create<GmlEntry> (name);
+                    entry.Offset = index.ReadUInt32() + data_offset;
+                    entry.Size   = index.ReadUInt32();
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                    entry.Header = index.ReadBytes (4);
+                }
+                return new GmlArchive (file, this, dir, key);
+            }
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var garc = arc as GmlArchive;
+            var gent = entry as GmlEntry;
+            if (null == garc || null == gent)
+                return base.OpenEntry (arc, entry);
+            var data = garc.File.View.ReadBytes (entry.Offset, entry.Size);
+            for (int i = gent.Header.Length; i < data.Length; ++i)
+                data[i] = garc.Key[data[i]];
+            Buffer.BlockCopy (gent.Header, 0, data, 0, gent.Header.Length);
+            return new BinMemoryStream (data, entry.Name);
+        }
+
+        internal static void LzssUnpack (Stream input, byte[] output)
+        {
+            const int frame_mask = 0xFFF;
+            byte[] frame = new byte[0x1000];
+            int frame_pos = 0xFEE;
+            int dst = 0;
+            int ctl = 2;
+            while (dst < output.Length)
+            {
+                ctl >>= 1;
+                if (1 == ctl)
+                {
+                    ctl = input.ReadByte();
+                    if (-1 == ctl)
+                        break;
+                    ctl |= 0x100;
+                }
+                if (0 != (ctl & 1))
+                {
+                    int b = input.ReadByte();
+                    if (-1 == b)
+                        break;
+                    output[dst++] = frame[frame_pos++ & frame_mask] = (byte)b;
+                }
+                else
+                {
+                    int lo = input.ReadByte();
+                    if (-1 == lo)
+                        break;
+                    int hi = input.ReadByte();
+                    if (-1 == hi)
+                        break;
+                    int offset = (hi & 0xf0) << 4 | lo;
+                    int count = Math.Min ((~hi & 0xF) + 3, output.Length-dst);
+                    while (count --> 0)
+                    {
+                        byte v = frame[offset++ & frame_mask];
+                        frame[frame_pos++ & frame_mask] = v;
+                        output[dst++] = v;
+                    }
+                }
+            }
+        }
+    }
+}