GARbro-mirror/ArcFormats/Entis/ArcPAC.cs
2017-01-09 02:25:22 +04:00

101 lines
4.4 KiB
C#

//! \file ArcPAC.cs
//! \date Sun Jan 08 11:43:23 2017
//! \brief Terios resource archive.
//
// Copyright (C) 2017 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;
namespace GameRes.Formats.Entis
{
/// <summary>
/// Archive format used in Teri☆Mix
/// </summary>
[Export(typeof(ArchiveFormat))]
public class PacOpener : ArchiveFormat
{
public override string Tag { get { return "PAC/TERIOS"; } }
public override string Description { get { return "Terios resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
static readonly byte[] DefaultPassword = Encodings.cp932.GetBytes ("パブロ・ディエゴ・ホセ・フランチスコ・ド・ポール・ジャン・ネボムチェーノ・クリスバン・ クリスピアノ・ド・ラ・ンチシュ・トリニダット・ルイス・イ・ピカソのシプリアーノ・サンティシマ・トリニダードは三位一体の事だったりする");
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".pac", StringComparison.InvariantCultureIgnoreCase))
return null;
uint index_offset = 0;
var name_buf = new byte[0x18];
var dir = new List<Entry>();
while (index_offset < file.MaxOffset && dir.Count < 0x2000)
{
if (0x18 != file.View.Read (index_offset, name_buf, 0, 0x18))
return null;
if (0x20 == name_buf[0])
break;
int name_length = 0;
for (name_length = 0; name_length < name_buf.Length; ++name_length)
{
if (name_buf[name_length] < 0x20)
return null;
else if (0x20 == name_buf[name_length])
break;
}
if (name_buf.Length == name_length)
return null;
var name = Encodings.cp932.GetString (name_buf, 0, name_length);
var entry = FormatCatalog.Instance.Create<Entry> (name);
index_offset += 0x18;
entry.Offset = 0x40000 + file.View.ReadUInt32 (index_offset);
entry.Size = file.View.ReadUInt32 (index_offset+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 8;
}
if (0 == dir.Count || 0x2000 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (0 != arc.File.View.ReadByte (entry.Offset))
return base.OpenEntry (arc, entry);
var data = arc.File.View.ReadBytes (entry.Offset+1, entry.Size-1);
int k = 0;
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= (byte)~DefaultPassword[k++];
if (k >= DefaultPassword.Length)
k = 0;
}
return new BinMemoryStream (data, entry.Name);
}
}
}