GARbro-mirror/ArcFormats/Debonosu/ArcPAK.cs

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//! \file ArcPAK.cs
//! \date Sat Sep 19 08:51:36 2015
//! \brief Debonosu Works 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 System.IO.Compression;
using GameRes.Utility;
namespace GameRes.Formats.Debonosu
{
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
{
public override string Tag { get { return "PAK/Debonosu"; } }
public override string Description { get { return "Debonosu Works resource archive"; } }
public override uint Signature { get { return 0x004B4150; } } // 'PAK'
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public PakOpener ()
{
Extensions = new string[] { "pak" };
}
public override ArcFile TryOpen (ArcView file)
{
uint index_offset = file.View.ReadUInt16 (4);
if (0 != file.View.ReadUInt16 (10))
return null;
uint info_size = file.View.ReadUInt32 (index_offset);
int root_count = file.View.ReadInt32 (index_offset+8);
uint unpacked_size = file.View.ReadUInt32 (index_offset+0xC);
uint packed_size = file.View.ReadUInt32 (index_offset+0x10);
using (var packed = file.CreateStream (index_offset+info_size, packed_size))
using (var unpacked = new DeflateStream (packed, CompressionMode.Decompress))
using (var reader = new IndexReader (unpacked, index_offset+info_size+packed_size))
{
var dir = reader.ReadRoot (root_count);
if (null == dir)
return null;
return new ArcFile (file, this, dir);
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var packed = entry as PackedEntry;
if (null == packed || !packed.IsPacked)
return input;
return new DeflateStream (input, CompressionMode.Decompress);
}
internal sealed class IndexReader : IDisposable
{
BinaryReader m_input;
long m_base_offset;
List<Entry> m_dir = new List<Entry>();
public IndexReader (Stream input, long base_offset)
{
m_input = new ArcView.Reader (input);
m_base_offset = base_offset;
}
public List<Entry> ReadRoot (int root_count)
{
ReadDir ("", root_count);
return m_dir;
}
void ReadDir (string path, int count)
{
for (int i = 0; i < count; ++i)
{
long offset = m_input.ReadInt64();
long unpacked = m_input.ReadInt64();
long packed = m_input.ReadInt64();
uint flags = m_input.ReadUInt32();
m_input.ReadUInt64(); // ctime
m_input.ReadUInt64(); // atime
m_input.ReadUInt64(); // mtime
var name = Path.Combine (path, ReadName());
if (0 != (flags & 0x10))
{
ReadDir (name, (int)unpacked);
}
else
{
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = m_base_offset + offset;
entry.Size = (uint)packed;
entry.UnpackedSize = (uint)unpacked;
entry.IsPacked = true;
m_dir.Add (entry);
}
}
}
byte[] name_buffer = new byte[32];
string ReadName ()
{
int size = 0;
for (;;)
{
int b = m_input.ReadByte();
if (0 == b)
break;
if (name_buffer.Length == size)
{
Array.Resize (ref name_buffer, checked(size/2*3));
}
name_buffer[size++] = (byte)b;
}
return Encodings.cp932.GetString (name_buffer, 0, size);
}
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
}
}
}
}