From 6389d3c04c8bcf50c1546763fe825fe67217a1e6 Mon Sep 17 00:00:00 2001
From: morkt <morkt@users.noreply.github.com>
Date: Wed, 25 Jul 2018 10:14:38 +0400
Subject: [PATCH] (Legacy): implemented Libido archives.

---
 Legacy/Libido/ArcARC.cs | 88 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Legacy/Libido/ArcARC.cs

diff --git a/Legacy/Libido/ArcARC.cs b/Legacy/Libido/ArcARC.cs
new file mode 100644
index 00000000..6728f14b
--- /dev/null
+++ b/Legacy/Libido/ArcARC.cs
@@ -0,0 +1,88 @@
+//! \file       ArcARC.cs
+//! \date       2018 Jul 16
+//! \brief      Libido 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Compression;
+
+// [030228][Libido] Libido 7 DVD
+
+namespace GameRes.Formats.Libido
+{
+    [Export(typeof(ArchiveFormat))]
+    public class ArcOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ARC/LIBIDO"; } }
+        public override string Description { get { return "Libido 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)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count))
+                return null;
+
+            uint index_offset = 4;
+            var name_buf = new byte[0x14];
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                file.View.Read (index_offset, name_buf, 0, 0x14);
+                int j;
+                for (j = 0; j < 0x14; ++j)
+                {
+                    name_buf[j] ^= 0xFF;
+                    if (0 == name_buf[j])
+                        break;
+                }
+                if (0 == j)
+                    return null;
+                var name = Encodings.cp932.GetString (name_buf, 0, j);
+                var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
+                entry.UnpackedSize = file.View.ReadUInt32 (index_offset+0x14);
+                entry.Size         = file.View.ReadUInt32 (index_offset+0x18);
+                entry.Offset       = file.View.ReadUInt32 (index_offset+0x1C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                entry.IsPacked = entry.Size != entry.UnpackedSize;
+                dir.Add (entry);
+                index_offset += 0x20;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var pent = entry as PackedEntry;
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            if (null == pent || !pent.IsPacked)
+                return input;
+            return new LzssStream (input);
+        }
+    }
+}