implemented Ai5Win resources (*.arc archives and *.gcc images)

only one archives encryption scheme for now.
2026-07-08 01:30:18 +08:00 · 2015-07-01 01:06:35 +04:00
parent 8cdae1027c
commit d2aaa1b075
5 changed files with 578 additions and 2 deletions
--- a/ArcFormats/ArcAi5Win.cs
+++ b/ArcFormats/ArcAi5Win.cs
@@ -0,0 +1,98 @@
+//! \file       ArcAi5Win.cs
+//! \date       Mon Jun 29 04:41:29 2015
+//! \brief      Ai5Win engine resource archive.
+//
+// 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 System.Linq;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Elf
+{
+    public class ArcIndexScheme
+    {
+        public int  NameLength;
+        public byte NameKey;
+        public uint SizeKey;
+        public uint OffsetKey;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class ArcOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ARC/AI5WIN"; } }
+        public override string Description { get { return "AI5WIN engine resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public static readonly Dictionary<string, ArcIndexScheme> KnownSchemes = new Dictionary<string, ArcIndexScheme> {
+            { "Jokei Kazoku ~Inbou~", new ArcIndexScheme
+                { NameLength = 0x1E, NameKey = 0x73, SizeKey = 0xAF5789BC, OffsetKey = 0x59FACB45 } },
+        };
+
+        public ArcOpener ()
+        {
+            Extensions = new string[] { "arc" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (count <= 0 || count > 0xfffff)
+                return null;
+            long index_offset = 4;
+            var scheme = KnownSchemes.First().Value;
+            uint index_size = (uint)(count * (scheme.NameLength + 8));
+            if (index_size > file.View.Reserve (index_offset, index_size))
+                return null;
+            var name_buf = new byte[scheme.NameLength];
+            var dir = new List<Entry>();
+            for (int i = 0; i < count; ++i)
+            {
+                file.View.Read (index_offset, name_buf, 0, (uint)scheme.NameLength);
+                for (int n = 0; n < name_buf.Length; ++n)
+                {
+                    name_buf[n] ^= scheme.NameKey;
+                    if (0 == name_buf[n])
+                        break;
+                }
+                string name = Binary.GetCString (name_buf, 0, name_buf.Length);
+                if (0 == name.Length)
+                    return null;
+                index_offset += scheme.NameLength;
+                var entry = FormatCatalog.Instance.CreateEntry (name);
+                entry.Size   = file.View.ReadUInt32 (index_offset)   ^ scheme.SizeKey;
+                entry.Offset = file.View.ReadUInt32 (index_offset+4) ^ scheme.OffsetKey;
+                if (entry.Offset < index_size+4 || !entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_offset += 8;
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}