GARbro-mirror/ArcFormats/Aoi/ArcVFS.cs

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//! \file ArcVFS.cs
//! \date Sun Jan 17 07:41:37 2016
//! \brief SofthouseChara resource archive implementation.
//
// 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 System.Text;
namespace GameRes.Formats.Aoi
{
[Export(typeof(ArchiveFormat))]
public class VfsOpener : ArchiveFormat
{
public override string Tag { get { return "VFS/AOI"; } }
public override string Description { get { return "Aoi engine resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public VfsOpener ()
{
Extensions = new string[] { "vfs" };
Signatures = new uint[] { 0x01014656, 0x02004656, 0 };
}
public override ArcFile TryOpen (ArcView file)
{
int signature = file.View.ReadInt16 (0);
if (0x4656 != signature && 0x4C56 != signature)
return null;
int version = file.View.ReadInt16 (2);
int count = file.View.ReadInt16 (4);
if (!IsSaneCount (count))
return null;
int entry_size = file.View.ReadInt16 (6);
int index_size = file.View.ReadInt32 (8);
if (entry_size <= 0 || index_size <= 0 || file.MaxOffset != file.View.ReadUInt32 (0xC))
return null;
if (version >= 0x0200)
return OpenV2 (file, count, entry_size, index_size);
int index_offset = 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, 0x13);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset+0x13);
entry.Size = file.View.ReadUInt32 (index_offset+0x17);
entry.UnpackedSize = file.View.ReadUInt32 (index_offset+0x1B);
entry.IsPacked = 0 != file.View.ReadByte (index_offset+0x1F);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += entry_size;
}
return new ArcFile (file, this, dir);
}
ArcFile OpenV2 (ArcView file, int count, int entry_size, int index_size)
{
int index_offset = 0x10;
int filenames_offset = index_offset + entry_size * count;
int filenames_length = file.View.ReadInt32 (filenames_offset);
char[] filenames;
using (var fn_stream = file.CreateStream (filenames_offset+8, (uint)filenames_length*2))
using (var fn_reader = new BinaryReader (fn_stream, Encoding.Unicode))
filenames = fn_reader.ReadChars (filenames_length);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
int name_offset = file.View.ReadInt32 (index_offset);
if (name_offset < 0 || name_offset >= filenames.Length)
return null;
var name = GetName (filenames, name_offset);
if (0 == name.Length)
return null;
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset+0xA);
entry.Size = file.View.ReadUInt32 (index_offset+0xE);
entry.UnpackedSize = file.View.ReadUInt32 (index_offset+0x12);
entry.IsPacked = 0 != file.View.ReadByte (index_offset+0x16);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += entry_size;
}
return new ArcFile (file, this, dir);
}
static string GetName (char[] names, int begin)
{
int end = Array.IndexOf (names, '\0', begin);
if (-1 == end)
end = names.Length;
return new string (names, begin, end-begin);
}
}
}