mirror of
https://github.com/crskycode/GARbro.git
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245 lines
9.8 KiB
C#
245 lines
9.8 KiB
C#
//! \file ArcGsPack.cs
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//! \date Thu Apr 16 14:55:01 2015
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//! \brief GsPack resource archives implementation.
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//
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// Copyright (C) 2015 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 System.Linq;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Gs
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{
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internal class GsPackArchive : ArcFile
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{
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public GsPackArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir)
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: base (arc, impl, dir)
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{
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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{
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public override string Tag { get { return "GsPack"; } }
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public override string Description { get { return "GsPack resource archive"; } }
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public override uint Signature { get { return 0x61746144; } } // 'Data'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public PakOpener ()
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{
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Extensions = new string[] { "pak", "dat", "pa_" };
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Signatures = new uint[] { 0x61746144, 0x61507347 };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!(file.View.AsciiEqual (0, "DataPack5") ||
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file.View.AsciiEqual (0, "GsPack5") ||
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file.View.AsciiEqual (0, "GsPack4")))
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return null;
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int version_minor = file.View.ReadUInt16 (0x30);
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int version_major = file.View.ReadUInt16 (0x32);
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uint index_size = file.View.ReadUInt32 (0x34);
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int count = file.View.ReadInt32 (0x3c);
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if (!IsSaneCount (count) || index_size > 0xffffff)
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return null;
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uint is_encrypted = file.View.ReadUInt32 (0x38);
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long data_offset = file.View.ReadUInt32 (0x40);
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int index_offset = file.View.ReadInt32 (0x44);
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int entry_size = version_major < 5 ? 0x48 : 0x68;
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int unpacked_size = count * entry_size;
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byte[] index;
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if (index_size != 0)
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{
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byte[] packed_index = file.View.ReadBytes (index_offset, index_size);
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if (index_size != packed_index.Length)
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return null;
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if (0 != (is_encrypted & 1))
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for (int i = 0; i != packed_index.Length; ++i)
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packed_index[i] ^= (byte)i;
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using (var stream = new MemoryStream (packed_index))
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using (var reader = new LzssReader (stream, packed_index.Length, unpacked_size))
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{
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reader.Unpack();
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index = reader.Data;
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}
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}
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else
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{
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index = file.View.ReadBytes (index_offset, (uint)unpacked_size);
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}
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index_offset = 0;
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string default_type = "";
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var arc_name = Path.GetFileNameWithoutExtension (file.Name);
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if (arc_name.StartsWith ("image", StringComparison.OrdinalIgnoreCase))
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default_type = "image";
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else if (arc_name.StartsWith ("voice", StringComparison.OrdinalIgnoreCase))
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default_type = "audio";
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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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string name = Binary.GetCString (index, index_offset, 0x40);
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if (0 != name.Length)
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{
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var entry = new Entry {
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Name = name,
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Type = default_type,
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Offset = data_offset + LittleEndian.ToUInt32 (index, index_offset+0x40),
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Size = LittleEndian.ToUInt32 (index, index_offset+0x44),
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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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index_offset += entry_size;
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}
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if (0 != (is_encrypted & 2))
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return new GsPackArchive (file, this, dir);
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if (string.IsNullOrEmpty (default_type))
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{
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foreach (var entry in dir)
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{
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uint signature = file.View.ReadUInt32 (entry.Offset);
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var res = AutoEntry.DetectFileType (signature);
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entry.ChangeType (res);
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}
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}
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return new ArcFile (file, this, dir);
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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 garc = arc as GsPackArchive;
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if (null == garc)
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return base.OpenEntry (arc, entry);
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var data = garc.File.View.ReadBytes (entry.Offset, entry.Size);
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DecryptData (data, entry.Name);
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return new BinMemoryStream (data, entry.Name);
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}
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void DecryptData (byte[] data, string key)
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{
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int numkey = 0;
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for (int i = 0; i < key.Length; ++i)
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numkey = numkey * 37 + (key[i] | 0x20);
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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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int* data32 = (int*)data8;
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for (int count = data.Length / 4; count > 0; --count)
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*data32++ ^= numkey;
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}
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}
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}
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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 "GsData"; } }
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public override string Description { get { return "GsPack resource archive"; } }
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public override uint Signature { get { return 0x59537347; } } // 'GsSY'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { 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 override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (0, "GsSYMBOL5BINDATA"))
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return null;
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uint header_size = file.View.ReadUInt32 (0xa4);
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if (header_size < 0xd0)
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return null;
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int count = file.View.ReadInt32 (0xa8);
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uint index_offset = file.View.ReadUInt32 (0xb8);
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uint index_size = file.View.ReadUInt32 (0xbc);
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uint crypt_key = file.View.ReadUInt32 (0xc0);
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uint unpacked_index_size = file.View.ReadUInt32 (0xc4);
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if (count * 0x18 != unpacked_index_size)
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return null;
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uint data_offset = file.View.ReadUInt32 (0xc8);
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byte[] packed_index = new byte[index_size];
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if (index_size != file.View.Read (index_offset, packed_index, 0, index_size))
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return null;
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if (0 != crypt_key)
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for (int i = 0; i != packed_index.Length; ++i)
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packed_index[i] ^= (byte)(i & crypt_key);
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using (var stream = new MemoryStream (packed_index))
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using (var reader = new LzssReader (stream, packed_index.Length, (int)unpacked_index_size))
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{
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reader.Unpack();
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var index = reader.Data;
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index_offset = 0;
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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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var entry = new PackedEntry
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{
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Name = i.ToString ("D5"),
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Offset = data_offset + LittleEndian.ToUInt32 (index, (int)index_offset),
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Size = LittleEndian.ToUInt32 (index, (int)index_offset + 4),
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UnpackedSize = LittleEndian.ToUInt32 (index, (int)index_offset + 8),
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};
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dir.Add (entry);
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index_offset += 0x18;
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}
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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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if (0 == entry.Size)
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return Stream.Null;
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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if (entry is PackedEntry)
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return new LzssStream (input);
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return input;
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}
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}
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[Export(typeof(ScriptFormat))]
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public class GsScriptFormat : GenericScriptFormat
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{
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public override string Tag { get { return "SCW"; } }
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public override string Description { get { return "GsWin script file"; } }
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public override uint Signature { get { return 0x20574353; } } // 'SCW '
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public GsScriptFormat ()
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{
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Signatures = new uint[] { 0x20574353, 0x35776353, 0x34776353 };
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}
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}
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}
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