morkt f1d66206bc (IResource.CanWrite): new property.
(ArchiveFormat.CanCreate): renamed to CanWrite.
2016-10-11 00:05:22 +04:00

164 lines
6.2 KiB
C#

//! \file ArcFVP.cs
//! \date Sat Feb 07 23:23:02 2015
//! \brief Favorit View Point system engine archive 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 System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.FVP
{
[Export(typeof(ArchiveFormat))]
public class BinOpener : ArchiveFormat
{
public override string Tag { get { return "BIN/ACPXPK"; } }
public override string Description { get { return "Favorite View Point resource archive"; } }
public override uint Signature { get { return 0x58504341; } } // "ACPX"
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
public BinOpener ()
{
Extensions = new string[] { "bin" };
}
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (4, "PK01"))
return null;
int count = file.View.ReadInt32 (8);
if (!IsSaneCount (count))
return null;
long index_offset = 0x0c;
uint index_size = (uint)(0x28 * count);
if (index_size > file.View.Reserve (index_offset, index_size))
return null;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
string name = file.View.ReadString (index_offset, 0x20);
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset+0x20);
entry.Size = file.View.ReadUInt32 (index_offset+0x24);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x28;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!(entry.Size > 8 && arc.File.View.AsciiEqual (entry.Offset, "acp\0")))
return base.OpenEntry (arc, entry);
int unpacked_size = Binary.BigEndian (arc.File.View.ReadInt32 (entry.Offset+4));
using (var input = arc.File.CreateStream (entry.Offset+8, entry.Size-8))
using (var decoder = new LzwDecoder (input, unpacked_size))
{
decoder.Unpack();
return new MemoryStream (decoder.Output);
}
}
}
internal sealed class LzwDecoder : IDisposable
{
private MsbBitStream m_input;
private byte[] m_output;
public byte[] Output { get { return m_output; } }
public LzwDecoder (Stream input, int unpacked_size)
{
m_input = new MsbBitStream (input, true);
m_output = new byte[unpacked_size];
}
public void Unpack ()
{
int dst = 0;
var lzw_dict = new int[0x8900];
int token_width = 9;
int dict_pos = 0;
while (dst < m_output.Length)
{
int token = m_input.GetBits (token_width);
if (-1 == token)
throw new EndOfStreamException ("Invalid compressed stream");
else if (0x100 == token) // end of input
break;
else if (0x101 == token) // increase token width
{
++token_width;
if (token_width > 24)
throw new InvalidFormatException ("Invalid comressed stream");
}
else if (0x102 == token) // reset dictionary
{
token_width = 9;
dict_pos = 0;
}
else
{
if (dict_pos >= lzw_dict.Length)
throw new InvalidFormatException ("Invalid comressed stream");
lzw_dict[dict_pos++] = dst;
if (token < 0x100)
{
m_output[dst++] = (byte)token;
}
else
{
token -= 0x103;
if (token >= dict_pos)
throw new InvalidFormatException ("Invalid comressed stream");
int src = lzw_dict[token];
int count = Math.Min (m_output.Length-dst, lzw_dict[token+1] - src + 1);
if (count < 0)
throw new InvalidFormatException ("Invalid comressed stream");
Binary.CopyOverlapped (m_output, src, dst, count);
dst += count;
}
}
}
}
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
GC.SuppressFinalize (this);
}
#endregion
}
}