mirror of
https://github.com/crskycode/GARbro.git
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184 lines
7.3 KiB
C#
184 lines
7.3 KiB
C#
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//! \file ArcDAT.cs
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//! \date 2019 Mar 18
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//! \brief Jam Creation resource archive.
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//
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// Copyright (C) 2019 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Compression;
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using GameRes.Utility;
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// [060127][ainos] Pachi Pachi Circuit
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namespace GameRes.Formats.JamCreation
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{
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internal class AinosEntry : PackedEntry
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{
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public bool IsEncrypted;
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}
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[Export(typeof(ArchiveFormat))]
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public class DatOpener : ArchiveFormat
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{
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public override string Tag { get { return "DAT/JAM"; } }
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public override string Description { get { return "Jam Creation resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return true; } }
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public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.Name.HasExtension (".dat") || VFS.IsPathEqualsToFileName (file.Name, "00000000.dat"))
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return null;
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var index_name = VFS.ChangeFileName (file.Name, "00000000.dat");
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if (!VFS.FileExists (index_name))
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return null;
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var arc_name = Path.GetFileName (file.Name);
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using (var index = VFS.OpenView (index_name))
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{
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var dir = ReadIndex (index, arc_name, file.MaxOffset);
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if (null == dir)
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return null;
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return new ArcFile (file, this, dir);
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}
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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var pent = entry as AinosEntry;
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if (null == pent)
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return input;
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if (pent.IsPacked)
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return new ZLibStream (input, CompressionMode.Decompress);
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if (!pent.IsEncrypted)
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return input;
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using (input)
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{
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var data = input.ReadBytes ((int)entry.Size);
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Decrypt (data, data.Length);
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return new BinMemoryStream (data, entry.Name);
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}
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}
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List<Entry> ReadIndex (ArcView file, string arc_name, long arc_length)
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{
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if (file.View.ReadUInt32 (0x14) != 1)
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return null;
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uint table_pos = 0x18;
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var indexDir = new List<Entry> (5);
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for (int i = 0; i < 5; ++i)
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{
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var entry = new Entry {
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Offset = file.View.ReadUInt32 (table_pos),
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Size = file.View.ReadUInt32 (table_pos+4),
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};
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if (entry.Size < 4 || !entry.CheckPlacement (file.MaxOffset))
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return null;
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indexDir.Add (entry);
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table_pos += 8;
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}
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int count = file.View.ReadInt32 (indexDir[0].Offset);
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if (!IsSaneCount (count) || 24 * count > indexDir[0].Size - 4)
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return null;
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var index = file.View.ReadBytes (indexDir[0].Offset+4, indexDir[0].Size-4);
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Decrypt (index, 24 * count);
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int name_count = file.View.ReadInt32 (indexDir[1].Offset);
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if (4 * name_count > indexDir[1].Size - 4)
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return null;
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var names_index = file.View.ReadBytes (indexDir[1].Offset+4, indexDir[1].Size-4);
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Decrypt (names_index, 4 * name_count);
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var names = file.View.ReadBytes (indexDir[2].Offset, indexDir[2].Size);
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Decrypt (names, (int)indexDir[2].Size);
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int arc_count = file.View.ReadInt32 (indexDir[3].Offset);
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if (4 * arc_count > indexDir[3].Size - 4)
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return null;
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var arc_names_index = file.View.ReadBytes (indexDir[3].Offset+4, indexDir[3].Size-4);
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Decrypt (arc_names_index, 4 * arc_count);
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var arc_names_data = file.View.ReadBytes (indexDir[4].Offset, indexDir[4].Size);
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Decrypt (arc_names_data, (int)indexDir[4].Size);
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var arc_names = new Dictionary<string, int> (arc_count);
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for (int i = 0; i < arc_count; ++i)
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{
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int pos = arc_names_index.ToInt32 (i * 4);
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var name = Binary.GetCString (arc_names_data, pos);
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arc_names[name] = i;
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}
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if (!arc_names.ContainsKey (arc_name))
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return null;
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int arc_id = arc_names[arc_name];
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var dir = new List<Entry>();
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string subdir_name = "";
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int index_pos = 0;
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for (int i = 0; i < count; ++i)
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{
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uint flags = index.ToUInt32 (index_pos+0x10);
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if (flags == 0x80000000) // directory
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{
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int name_pos = names_index.ToInt32 (i * 4);
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subdir_name = Binary.GetCString (names, name_pos);
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int subdir_count = index.ToInt32 (index_pos+0x14);
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}
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else
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{
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int id = index.ToInt32 (index_pos);
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if (id == arc_id)
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{
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int name_pos = names_index.ToInt32 (i * 4);
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var name = Path.Combine (subdir_name, Binary.GetCString (names, name_pos));
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var entry = Create<AinosEntry> (name);
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entry.Offset = index.ToUInt32 (index_pos+4);
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entry.Size = index.ToUInt32 (index_pos+8);
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entry.UnpackedSize = index.ToUInt32 (index_pos+12);
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entry.IsPacked = (flags & 0x100) != 0;
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entry.IsEncrypted = (flags & 0x200) != 0;
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if (entry.CheckPlacement (arc_length))
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dir.Add (entry);
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}
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}
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index_pos += 24;
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}
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if (0 == dir.Count)
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return null;
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return dir;
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}
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void Decrypt (byte[] data, int length)
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{
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byte prev = data[0];
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for (int i = 1; i < length; ++i)
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{
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data[i] -= (byte)(i + prev);
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prev = data[i];
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}
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}
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}
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}
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