GARbro-mirror/ArcFormats/DenSDK/ArcDAF.cs

105 lines
4.6 KiB
C#
Raw Normal View History

2016-01-22 06:34:07 +08:00
//! \file ArcDAF.cs
//! \date Thu Jan 21 22:33:29 2016
//! \brief DenSDK engine resource archive.
//
// Copyright (C) 2016 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.Compression;
using GameRes.Utility;
namespace GameRes.Formats.DenSdk
{
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
public override string Tag { get { return "DAT/DenSDK"; } }
public override string Description { get { return "DenSDK resource archive"; } }
public override uint Signature { get { return 0x32464144; } } // 'DAF2'
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public DatOpener ()
{
Extensions = new string[] { "dat" };
}
public override ArcFile TryOpen (ArcView file)
{
uint key = (uint)(file.View.ReadByte (0x20) << 24
| file.View.ReadByte (0x25) << 16
| file.View.ReadByte (0x2A) << 8
| file.View.ReadByte (0x2F));
int count = file.View.ReadInt32 (8) ^ (int)key;
if (!IsSaneCount (count))
return null;
uint packed_size = file.View.ReadUInt32 (0x10) ^ key;
uint unpacked_size = file.View.ReadUInt32 (0x14) ^ key;
uint base_offset = file.View.ReadUInt32 (0x1C) ^ key;
byte[] index = new byte[unpacked_size];
bool is_packed = file.View.ReadInt32 (0x18) == 1;
if (is_packed)
{
using (var input = file.CreateStream (0x30, packed_size))
using (var zindex = new ZLibStream (input, CompressionMode.Decompress))
zindex.Read (index, 0, index.Length);
base_offset = 0x30 + packed_size;
}
else
{
file.View.Read (0x30, index, 0, unpacked_size);
}
int index_offset = 0;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
int entry_size = LittleEndian.ToInt32 (index, index_offset) ^ (int)key;
if (entry_size < 0x30 || entry_size > index.Length-index_offset)
return null;
var name = Binary.GetCString (index, index_offset+0x34, entry_size-0x34);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = base_offset + (LittleEndian.ToUInt32 (index, index_offset+4) ^ (uint)key);
entry.Size = LittleEndian.ToUInt32 (index, index_offset+8) ^ (uint)key;
entry.UnpackedSize = LittleEndian.ToUInt32 (index, index_offset+0xC) ^ (uint)key;
entry.IsPacked = LittleEndian.ToInt32 (index, index_offset+0x30) != 0;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += entry_size;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
return input;
return new ZLibStream (input, CompressionMode.Decompress);
}
}
}