GARbro-mirror/ArcFormats/Silky/ArcAzurite.cs

86 lines
3.7 KiB
C#

//! \file ArcAzurite.cs
//! \date Fri Dec 30 04:09:23 2016
//! \brief Silky's resource archive.
//
// 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 GameRes.Utility;
namespace GameRes.Formats.Silky
{
[Export(typeof(ArchiveFormat))]
public class SilkyArcOpener : Ai6Opener
{
public override string Tag { get { return "ARC/AZURITE"; } }
public override string Description { get { return "Silky's resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".arc", StringComparison.InvariantCultureIgnoreCase))
return null;
uint index_size = file.View.ReadUInt32 (0);
if (index_size < 10 || index_size >= file.MaxOffset-4)
return null;
if (0 == file.View.ReadByte (4))
return null;
var dir = new List<Entry>();
using (var index = file.CreateStream (4, index_size))
{
var name_buffer = new byte[0x100];
while (index.PeekByte() != -1)
{
int name_length = index.ReadByte();
if (0 == name_length)
return null;
if (name_length != index.Read (name_buffer, 0, name_length))
return null;
DecryptName (name_buffer, name_length);
var name = Encodings.cp932.GetString (name_buffer, 0, name_length);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Size = Binary.BigEndian (index.ReadUInt32());
entry.UnpackedSize = Binary.BigEndian (index.ReadUInt32());
entry.Offset = Binary.BigEndian (index.ReadUInt32());
if (entry.Offset < index_size+4 || !entry.CheckPlacement (file.MaxOffset))
return null;
entry.IsPacked = entry.Size != entry.UnpackedSize;
dir.Add (entry);
}
}
return new ArcFile (file, this, dir);
}
static void DecryptName (byte[] buffer, int length)
{
byte key = (byte)length;
for (int i = 0; i < length; ++i)
buffer[i] += key--;
}
}
}