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//! \file ArcLIBU.cs
//! \date Mon Mar 13 17:17:17 2017
//! \brief Malie System Unicode archive implementation.
//
// 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;
using System.Text;
using GameRes.Cryptography;
namespace GameRes.Formats.Malie
{
[Export(typeof(ArchiveFormat))]
public class LibUOpener : ArchiveFormat
{
public override string Tag { get { return "LIBU"; } }
public override string Description { get { return "Malie engine resource archive"; } }
public override uint Signature { get { return 0x5542494C; } } // 'LIBU'
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
public LibUOpener ()
{
Extensions = new string[] { "lib" };
}
public override ArcFile TryOpen (ArcView file)
{
using (var reader = LibUReader.Create (file))
{
if (!reader.ReadIndex())
return null;
return new ArcFile (file, this, reader.Dir);
}
}
}
internal sealed class LibUReader : ILibIndexReader
{
BinaryReader m_input;
readonly long m_max_offset;
List<Entry> m_dir = new List<Entry>();
public List<Entry> Dir { get { return m_dir; } }
public LibUReader (Stream input)
{
m_input = new BinaryReader (input, Encoding.Unicode);
m_max_offset = input.Length;
}
public static LibUReader Create (ArcView file)
{
var input = file.CreateStream();
return new LibUReader (input);
}
public static LibUReader Create (ArcView file, Camellia encryption)
{
var input = new EncryptedStream (file, encryption);
return new LibUReader (input);
}
public bool ReadIndex ()
{
return ReadDir ("", 0) && m_dir.Count > 0;
}
bool ReadDir (string root, long base_offset)
{
m_input.BaseStream.Position = base_offset;
if (0x5542494C != m_input.ReadUInt32()) // 'LIBU'
return false;
m_input.ReadInt32();
int count = m_input.ReadInt32();
if (!ArchiveFormat.IsSaneCount (count))
return false;
if (m_dir.Capacity < m_dir.Count + count)
m_dir.Capacity = m_dir.Count + count;
long index_pos = base_offset + 0x10;
for (int i = 0; i < count; ++i)
{
m_input.BaseStream.Position = index_pos;
var name = ReadName();
uint entry_size = m_input.ReadUInt32();
long entry_offset = base_offset + m_input.ReadInt64();
index_pos = m_input.BaseStream.Position;
bool has_extension = -1 != name.IndexOf ('.');
name = Path.Combine (root, name);
if (!has_extension && ReadDir (name, entry_offset))
continue;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = entry_offset;
entry.Size = entry_size;
if (!entry.CheckPlacement (m_max_offset))
return false;
m_dir.Add (entry);
}
return true;
}
char[] m_name_buffer = new char[0x22];
string ReadName ()
{
m_input.Read (m_name_buffer, 0, 0x22);
int length = Array.IndexOf (m_name_buffer, '\0');
if (-1 == length)
length = m_name_buffer.Length;
return new string (m_name_buffer, 0, length);
}
#region IDisposable methods
bool m_disposed = false;
public void Dispose ()
{
if (!m_disposed)
{
m_input.Dispose();
m_disposed = true;
}
}
#endregion
}
}