GARbro-mirror/ArcFormats/Will/ArcPulltop.cs

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//! \file ArcPulltop.cs
//! \date Sun Nov 29 04:43:52 2015
//! \brief Pulltop archives implementation.
//
// 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 GameRes.Utility;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
namespace GameRes.Formats.Will
{
[Export(typeof(ArchiveFormat))]
public class Arc2Opener : ArchiveFormat
{
public override string Tag { get { return "ARC/WillV2"; } }
public override string Description { get { return "Will Co. game engine resource archive v2"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public Arc2Opener ()
{
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Extensions = new string[] { "arc", "ar2" };
}
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0);
if (!IsSaneCount (count))
return null;
uint index_offset = 8;
uint index_size = file.View.ReadUInt32 (4);
uint base_offset = index_offset + index_size;
if (index_size > base_offset || base_offset >= file.MaxOffset)
return null;
file.View.Reserve (index_offset, index_size);
var dir = new List<Entry> (count);
var name_buffer = new StringBuilder (0x40);
for (int i = 0; i < count; ++i)
{
if (index_offset >= base_offset)
return null;
uint size = file.View.ReadUInt32 (index_offset);
long offset = (long)base_offset + file.View.ReadUInt32 (index_offset+4);
index_offset += 8;
name_buffer.Clear();
for (;;)
{
if (index_offset >= base_offset)
return null;
char c = (char)file.View.ReadUInt16 (index_offset);
index_offset += 2;
if (0 == c)
break;
name_buffer.Append (c);
}
if (0 == name_buffer.Length)
return null;
var name = name_buffer.ToString();
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = offset;
entry.Size = size;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
if (index_offset != base_offset)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!entry.Name.EndsWith (".ws2", StringComparison.InvariantCultureIgnoreCase))
return base.OpenEntry (arc, entry);
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
for (int i = 0; i < data.Length; ++i)
{
data[i] = Binary.RotByteR (data[i], 2);
}
return new MemoryStream (data);
}
}
}