GARbro-mirror/ArcFormats/UMeSoft/ArcPK.cs

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//! \file ArcPK.cs
//! \date Wed Jul 15 00:19:23 2015
//! \brief U-Me soft resource archives.
//
// 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.UMeSoft
{
[Export(typeof(ArchiveFormat))]
public class PkOpener : ArchiveFormat
{
public override string Tag { get { return "PK"; } }
public override string Description { get { return "U-Me Soft resources archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public PkOpener ()
{
Extensions = new string[] { "pk", "gpk", "tpk", "wpk", "mpk" };
}
public override ArcFile TryOpen (ArcView file)
{
long index_end = file.MaxOffset - 4;
uint index_size = file.View.ReadUInt32 (index_end);
if (0 == index_size || index_size >= index_end)
return null;
long index_offset = index_end - index_size;
if (index_size > file.View.Reserve (index_offset, index_size))
return null;
var dir = new List<Entry>();
while (index_offset < index_end)
{
uint name_len = file.View.ReadByte (index_offset++);
if (0 == name_len)
break;
if (name_len+14 > index_end-index_offset)
return null;
string name = file.View.ReadString (index_offset, name_len);
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if (name.Length < (int)name_len / 2 + 1)
return null;
index_offset += name_len+6;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Size = file.View.ReadUInt32 (index_offset);
entry.Offset = file.View.ReadUInt32 (index_offset+4);
if (!entry.CheckPlacement (index_offset))
return null;
dir.Add (entry);
index_offset += 8;
}
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (!entry.Name.EndsWith (".scr", StringComparison.InvariantCultureIgnoreCase) &&
!entry.Name.EndsWith (".tbl", StringComparison.InvariantCultureIgnoreCase))
return base.OpenEntry (arc, entry);
int output_size = arc.File.View.ReadInt32 (entry.Offset);
if (output_size <= 0)
return base.OpenEntry (arc, entry);
using (var input = arc.File.CreateStream (entry.Offset+4, entry.Size-4))
{
var data = LzUnpack (input, output_size);
for (int i = 0; i < data.Length; ++i)
data[i] ^= 0x42;
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return new BinMemoryStream (data, entry.Name);
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}
}
byte[] LzUnpack (Stream input, int output_size)
{
var output = new byte[output_size];
int ctl = 0;
int mask = 0;
int dst = 0;
while (dst < output_size)
{
mask >>= 1;
if (0 == mask)
{
ctl = input.ReadByte();
if (-1 == ctl)
break;
mask = 0x80;
}
if (0 == (ctl & mask))
{
output[dst++] = (byte)input.ReadByte();
}
else
{
int lo = input.ReadByte();
int hi = input.ReadByte();
if (-1 == lo || -1 == hi)
break;
int offset = hi << 4 | lo >> 4;
if (0 == offset)
break;
int count = (lo & 0xF) + 3;
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
}
}
return output;
}
}
}