GARbro-mirror/ArcFormats/Pajamas/ArcGameDat.cs

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//! \file ArcGamedat.cs
//! \date Fri May 01 03:12:04 2015
//! \brief Pajamas Adventure System resource archive.
//
// Copyright (C) 2015 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.Utility;
namespace GameRes.Formats.Pajamas
{
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
public override string Tag { get { return "GAMEDAT"; } }
public override string Description { get { return "Pajamas Adventure System resource archive"; } }
public override uint Signature { get { return 0x454d4147; } } // 'GAME'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public DatOpener ()
{
Extensions = new string[] { "dat", "pak" };
}
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (0, "GAMEDAT PAC"))
return null;
int version = file.View.ReadByte (0x0b);
if ('K' == version)
version = 1;
else if ('2' == version)
version = 2;
else
return null;
int count = file.View.ReadInt32 (0x0c);
if (count <= 0 || count > 0xfffff)
return null;
int name_length = 1 == version ? 16 : 32;
int name_offset = 0x10;
int index_offset = name_offset + name_length*count;
int base_offset = index_offset + 8*count;
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if ((uint)base_offset > file.View.Reserve (0, (uint)base_offset))
return null;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (name_offset, (uint)name_length);
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = base_offset + file.View.ReadUInt32 (index_offset);
entry.Size = file.View.ReadUInt32 (index_offset+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
name_offset += name_length;
index_offset += 8;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!entry.Name.Equals ("textdata.bin", StringComparison.InvariantCultureIgnoreCase))
return arc.File.CreateStream (entry.Offset, entry.Size);
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
// encrypted PJADV
if (0x95 == data[0] && 0x6B == data[1] && 0x3C == data[2]
&& 0x9D == data[3] && 0x63 == data[4])
{
byte key = 0xC5;
for (int i = 0; i < data.Length; ++i)
{
data[i] ^= key;
key += 0x5C;
}
}
return new MemoryStream (data);
}
}
}