mirror of
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282 lines
10 KiB
C#
282 lines
10 KiB
C#
//! \file ArcDAT.cs
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//! \date Sat May 14 02:20:37 2016
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//! \brief 'non color' resource archive.
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//
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// Copyright (C) 2016 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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using GameRes.Formats.Properties;
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using GameRes.Formats.Strings;
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namespace GameRes.Formats.NonColor
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{
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internal class ArcDatEntry : PackedEntry
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{
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public byte[] RawName;
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public ulong Hash;
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public int Flags;
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}
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internal class ArcDatArchive : ArcFile
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{
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public readonly ulong MasterKey;
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public ArcDatArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, ulong key)
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: base (arc, impl, dir)
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{
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MasterKey = key;
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}
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}
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[Serializable]
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public class Scheme
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{
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public string Title;
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public ulong Hash;
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public Scheme(string title)
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{
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Title = title;
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var key = Encodings.cp932.GetBytes(title);
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Hash = Crc64.Compute(key, 0, key.Length);
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}
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}
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[Serializable]
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public class ArcDatScheme : ResourceScheme
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{
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public Dictionary<string, Scheme> KnownSchemes;
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public static ulong GetKey (string title)
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{
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var key = Encodings.cp932.GetBytes (title);
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return Crc64.Compute (key, 0, key.Length);
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}
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}
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public class ArcDatOptions : ResourceOptions
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{
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public string Scheme;
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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 "ARC/noncolor"; } }
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public override string Description { get { return "'non color' 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 CanCreate { get { return false; } }
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public DatOpener ()
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{
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Extensions = new string[] { "dat" };
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}
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public static readonly string PersistentFileMapName = "NCFileMap.dat";
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
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return null;
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int count = file.View.ReadInt32 (0) ^ 0x26ACA46E;
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if (!IsSaneCount (count))
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return null;
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var scheme = QueryScheme();
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if (null == scheme)
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return null;
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var file_map = ReadFilenameMap (scheme);
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uint index_offset = 4;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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ulong hash = file.View.ReadUInt64 (index_offset);
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int flags = file.View.ReadByte (index_offset+8) ^ (byte)hash;
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uint offset = file.View.ReadUInt32 (index_offset+9) ^ (uint)hash;
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uint size = file.View.ReadUInt32 (index_offset+0xD) ^ (uint)hash;
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uint unpacked_size = file.View.ReadUInt32 (index_offset+0x11) ^ (uint)hash;
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index_offset += 0x15;
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string name;
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byte[] raw_name = null;
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if (file_map.TryGetValue (hash, out raw_name))
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{
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name = Encodings.cp932.GetString (raw_name);
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}
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else if (2 == flags)
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{
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name = hash.ToString ("X8");
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}
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else
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{
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System.Diagnostics.Trace.WriteLine ("Unknown hash", hash.ToString ("X8"));
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continue;
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}
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if (flags != 2)
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{
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offset ^= raw_name[raw_name.Length >> 1];
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size ^= raw_name[raw_name.Length >> 2];
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unpacked_size ^= raw_name[raw_name.Length >> 3];
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}
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var entry = new ArcDatEntry {
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Name = name,
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Type = FormatCatalog.Instance.GetTypeFromName (name),
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RawName = raw_name,
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Hash = hash,
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Flags = flags,
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Offset = offset,
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Size = size,
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UnpackedSize = unpacked_size,
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IsPacked = 2 == flags,
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};
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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}
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return new ArcDatArchive (file, this, dir, scheme.Hash);
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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 darc = arc as ArcDatArchive;
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var dent = entry as ArcDatEntry;
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if (null == darc || null == dent || 0 == dent.Flags || 0 == dent.Size)
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return base.OpenEntry (arc, entry);
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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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if (2 == dent.Flags)
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{
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if (darc.MasterKey != 0)
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{
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unsafe
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{
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fixed (byte* data8 = data)
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{
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uint key = (uint)(dent.Hash ^ darc.MasterKey);
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uint* data32 = (uint*)data8;
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for (int i = data.Length/4; i > 0; --i)
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*data32++ ^= key;
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}
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}
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}
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return new ZLibStream (new MemoryStream (data), CompressionMode.Decompress);
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}
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// 1 == dent.Flags
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int block_length = data.Length / dent.RawName.Length;
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int n = 0;
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for (int i = 0; i < dent.RawName.Length-1; ++i)
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for (int j = 0; j < block_length; ++j)
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data[n++] ^= dent.RawName[i];
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return new MemoryStream (data);
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}
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static IDictionary<ulong, Tuple<uint, int>> FileMapIndex = null;
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internal IDictionary<ulong, Tuple<uint, int>> ReadIndex (BinaryReader idx)
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{
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int scheme_count = idx.ReadInt32();
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idx.BaseStream.Seek (12, SeekOrigin.Current);
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var map = new Dictionary<ulong, Tuple<uint, int>> (scheme_count);
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for (int i = 0; i < scheme_count; ++i)
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{
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ulong key = idx.ReadUInt64();
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uint offset = idx.ReadUInt32();
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int count = idx.ReadInt32();
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map[key] = Tuple.Create (offset, count);
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}
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return map;
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}
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Tuple<ulong, Dictionary<ulong, byte[]>> LastAccessedScheme;
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internal IDictionary<ulong, byte[]> ReadFilenameMap (Scheme scheme)
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{
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if (null != LastAccessedScheme && LastAccessedScheme.Item1 == scheme.Hash)
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return LastAccessedScheme.Item2;
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var dir = FormatCatalog.Instance.DataDirectory;
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var lst_file = Path.Combine (dir, PersistentFileMapName);
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var idx_file = Path.ChangeExtension (lst_file, ".idx");
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using (var idx_stream = File.OpenRead (idx_file))
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using (var idx = new BinaryReader (idx_stream))
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{
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if (null == FileMapIndex)
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FileMapIndex = ReadIndex (idx);
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Tuple<uint, int> nc_info;
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if (!FileMapIndex.TryGetValue (scheme.Hash, out nc_info))
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throw new UnknownEncryptionScheme();
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using (var lst_stream = File.OpenRead (lst_file))
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using (var lst = new BinaryReader (lst_stream))
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{
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var name_map = new Dictionary<ulong, byte[]> (nc_info.Item2);
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idx_stream.Position = nc_info.Item1;
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for (int i = 0; i < nc_info.Item2; ++i)
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{
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ulong key = idx.ReadUInt64();
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uint offset = idx.ReadUInt32();
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int length = idx.ReadInt32();
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lst_stream.Position = offset;
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name_map[key] = lst.ReadBytes (length);
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}
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LastAccessedScheme = Tuple.Create (scheme.Hash, name_map);
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return name_map;
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}
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}
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}
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public static Dictionary<string, Scheme> KnownSchemes = new Dictionary<string, Scheme>();
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public override ResourceScheme Scheme
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{
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get { return new ArcDatScheme { KnownSchemes = KnownSchemes }; }
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set { KnownSchemes = ((ArcDatScheme)value).KnownSchemes; }
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}
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Scheme QueryScheme ()
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{
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var options = Query<ArcDatOptions> (arcStrings.ArcEncryptedNotice);
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Scheme scheme;
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if (string.IsNullOrEmpty (options.Scheme) || !KnownSchemes.TryGetValue (options.Scheme, out scheme))
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return null;
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return scheme;
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new ArcDatOptions { Scheme = Settings.Default.NCARCScheme };
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetNCARC();
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}
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}
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}
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