GARbro-mirror/ArcFormats/elf/ArcVOL.cs

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2016-05-30 19:45:14 +08:00
//! \file ArcVOL.cs
//! \date Sun May 29 02:38:04 2016
//! \brief ancient elf resource archives.
//
// 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;
namespace GameRes.Formats.Elf
{
[Export(typeof(ArchiveFormat))]
public class VolOpener : ArchiveFormat
{
public override string Tag { get { return "VOL/ELF"; } }
public override string Description { get { return "Ancient elf resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public VolOpener ()
{
Extensions = new string[] { "vol" };
}
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".vol", StringComparison.InvariantCultureIgnoreCase))
return null;
uint first_offset = file.View.ReadUInt32 (0);
if (first_offset < 0x10 || 0 != (first_offset & 0xF) || first_offset >= file.MaxOffset)
return null;
int count = (int)(first_offset /4);
if (!IsSaneCount (count))
return null;
var offset_table = new List<uint> (count);
offset_table.Add (first_offset);
uint index_offset = 4;
for (int i = 1; i < count; ++i)
{
uint offset = file.View.ReadUInt32 (index_offset);
if (offset < offset_table[i-1] || offset > file.MaxOffset)
return null;
offset_table.Add (offset);
if (offset == file.MaxOffset)
break;
index_offset += 4;
}
var base_name = Path.GetFileNameWithoutExtension (file.Name);
var dir = new List<Entry> (offset_table.Count-1);
for (int i = 0; i < offset_table.Count-1; ++i)
{
uint size = offset_table[i+1] - offset_table[i];
if (0 == size)
continue;
var name = string.Format ("{0}#{1:D4}", base_name, i);
var entry = AutoEntry.Create (file, offset_table[i], name);
entry.Size = size;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
}
}