GARbro-mirror/ArcFormats/BlackCyc/ArcGPK.cs

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//! \file ArcGPK.cs
//! \date Sat Aug 01 12:01:26 2015
//! \brief Black Cyc engine images archive.
//
// 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.BlackCyc
{
[Export(typeof(ArchiveFormat))]
public class GpkOpener : ArchiveFormat
{
public override string Tag { get { return "GPK"; } }
public override string Description { get { return "Black Cyc engine images archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.EndsWith (".gpk", StringComparison.InvariantCultureIgnoreCase))
return null;
var gtb_name = Path.ChangeExtension (file.Name, "gtb");
var gtb_info = new FileInfo (gtb_name);
if (!gtb_info.Exists)
return null;
using (var gtb = new ArcView (gtb_name))
{
int count = gtb.View.ReadInt32 (0);
if (!IsSaneCount (count))
return null;
gtb.View.Reserve (0, (uint)gtb.MaxOffset);
int name_index = 4;
int offsets_index = name_index + count * 4;
int name_base = offsets_index + count * 4;
if (name_base >= gtb.MaxOffset)
return null;
uint next_offset = gtb.View.ReadUInt32 (offsets_index);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
offsets_index += 4;
int name_offset = name_base + gtb.View.ReadInt32 (name_index);
name_index += 4;
if (name_offset < name_base || name_offset >= gtb.MaxOffset)
return null;
string name = gtb.View.ReadString (name_offset, (uint)(gtb.MaxOffset-name_offset));
name += ".dwq";
var entry = FormatCatalog.Instance.CreateEntry (name);
entry.Offset = next_offset;
if (i + 1 == count)
next_offset = (uint)file.MaxOffset;
else
next_offset = gtb.View.ReadUInt32 (offsets_index);
entry.Size = next_offset - (uint)entry.Offset;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
}
}
}