bunch of stuff.

2026-07-08 01:30:18 +08:00 · 2023-08-24 01:33:50 +04:00
parent ea096c52ef
commit 77fde27d26
119 changed files with 11078 additions and 619 deletions
--- a/ArcFormats/TechGian/ArcBIN.cs
+++ b/ArcFormats/TechGian/ArcBIN.cs
@@ -0,0 +1,122 @@
+//! \file       ArcBIN.cs
+//! \date       2023 Aug 09
+//! \brief      Tech Gian Archive
+//
+// Copyright (C) 2023 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.Formats.Eagls;
+using GameRes.Utility;
+
+// [121102][Tech Gian Archive] Hanafuda Market Totsugeki! Tonari no Kanban Musume
+
+namespace GameRes.Formats.TechGian
+{
+    internal class RfilEntry : Entry
+    {
+        public int  EncryptionMethod;
+
+        public bool IsEncrypted {
+            get { return EncryptionMethod == 1 || EncryptionMethod == 2 || EncryptionMethod == 4; }
+        }
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class BinOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "BIN/RFIL"; } }
+        public override string Description { get { return "Tech Gian archive"; } }
+        public override uint     Signature { get { return 0x4C494652; } } // 'RFIL'
+        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 (8);
+            if (!IsSaneCount (count))
+                return null;
+            bool is_encrypted = file.View.ReadInt32 (12) == 1234;
+            long index_pos = 0x10;
+            var buffer = new byte[0x40];
+            var rnd = new CRuntimeRandomGenerator();
+            rnd.SRand (0);
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                file.View.Read (index_pos, buffer, 0, 0x40);
+                if (is_encrypted)
+                    DecryptRand (buffer, 0, 0x40, rnd);
+                var name = Binary.GetCString (buffer, 0, 0x30);
+                var entry = Create<RfilEntry> (name);
+                entry.Offset = buffer.ToUInt32 (0x34);
+                entry.Size = buffer.ToUInt32 (0x38);
+                entry.EncryptionMethod = buffer.ToInt32 (0x3C);
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                dir.Add (entry);
+                index_pos += 0x40;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var rent = (RfilEntry)entry;
+            if (!rent.IsEncrypted)
+                return base.OpenEntry (arc, entry);
+            var data = arc.File.View.ReadBytes (rent.Offset, rent.Size);
+            switch (rent.EncryptionMethod)
+            {
+            case 1:
+                DecryptData (data, 0, data.Length);
+                break;
+            case 2:
+                if (data.Length > 0)
+                    DecryptData (data, 0, (data.Length - 1) / 100 + 1);
+                break;
+            case 4:
+                DecryptData (data, 0, Math.Min (1024, data.Length));
+                break;
+            }
+            return new BinMemoryStream (data, entry.Name);
+        }
+
+        internal static void DecryptData (byte[] data, int pos, int length)
+        {
+            while (length --> 0)
+            {
+                data[pos++] ^= 0x7F;
+            }
+        }
+
+        internal static void DecryptRand (byte[] data, int pos, int length, IRandomGenerator rnd)
+        {
+            while (length --> 0)
+            {
+                data[pos++] ^= (byte)rnd.Rand();
+            }
+        }
+    }
+}