GARbro-mirror/ArcFormats/Eushully/ArcALF.cs

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//! \file ArcALF.cs
//! \date Sun Sep 20 13:58:52 2015
//! \brief Eushully and its subsidiaries resource archives.
//
// 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;
using GameRes.Compression;
namespace GameRes.Formats.Eushully
{
[Export(typeof(ArchiveFormat))]
public class AlfOpener : ArchiveFormat
{
public override string Tag { get { return "ALF"; } }
public override string Description { get { return "Eushully resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
static string[] IndexNames = new string[] { "sys4ini.bin", "sys3ini.bin" };
public override ArcFile TryOpen (ArcView file)
{
string dir_name = Path.GetDirectoryName (file.Name);
string file_name = Path.GetFileName (file.Name);
foreach (var ini_name in IndexNames)
{
string ini_path = VFS.CombinePath (dir_name, ini_name);
if (VFS.FileExists (ini_path))
{
var dir = ReadIndex (ini_path, file_name);
if (null != dir)
return new ArcFile (file, this, dir);
if (LastAccessedIndex != null)
break;
}
}
return null;
}
Tuple<string, Dictionary<string, List<Entry>>> LastAccessedIndex;
List<Entry> ReadIndex (string ini_file, string arc_name)
{
if (null == LastAccessedIndex
|| !LastAccessedIndex.Item1.Equals (ini_file, StringComparison.InvariantCultureIgnoreCase))
{
LastAccessedIndex = null;
using (var ini = VFS.OpenView (ini_file))
{
if (!ini.View.AsciiEqual (0, "S4IC") && !ini.View.AsciiEqual (0, "S3IC"))
return null;
uint packed_size = ini.View.ReadUInt32 (0x134);
using (var packed = ini.CreateStream (0x138, packed_size))
using (var unpacked = new LzssStream (packed))
using (var index = new BinaryReader (unpacked))
{
int arc_count = index.ReadInt32();
var name_buf = new byte[0x100];
var file_table = new Dictionary<string, List<Entry>> (arc_count, StringComparer.InvariantCultureIgnoreCase);
var arc_list = new List<List<Entry>> (arc_count);
for (int i = 0; i < arc_count; ++i)
{
index.Read (name_buf, 0, name_buf.Length);
var file_list = new List<Entry>();
file_table.Add (Binary.GetCString (name_buf, 0, name_buf.Length), file_list);
arc_list.Add (file_list);
}
int file_count = index.ReadInt32();
for (int i = 0; i < file_count; ++i)
{
index.Read (name_buf, 0, 0x40);
int arc_id = index.ReadInt32();
if (arc_id < 0 || arc_id >= arc_list.Count)
return null;
index.ReadInt32(); // file number
uint offset = index.ReadUInt32();
uint size = index.ReadUInt32();
var name = Binary.GetCString (name_buf, 0, 0x40);
if ("@" == name)
continue;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = offset;
entry.Size = size;
arc_list[arc_id].Add (entry);
}
LastAccessedIndex = Tuple.Create (ini_file, file_table);
}
}
}
List<Entry> dir = null;
LastAccessedIndex.Item2.TryGetValue (arc_name, out dir);
return dir;
}
}
}