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Entis GLS archives preliminary implementation (no encryption yet).

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morkt 2015-04-25 02:04:43 +04:00
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commit 17037fd7eb
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ArcFormats/ArcNOA.cs Normal file
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//! \file ArcNOA.cs
//! \date Thu Apr 23 15:57:17 2015
//! \brief Entis GLS engine 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 System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Entis
{
internal class NoaEntry : Entry
{
public byte[] Extra;
public uint Encryption;
public uint Attr;
}
[Export(typeof(ArchiveFormat))]
public class NoaOpener : ArchiveFormat
{
public override string Tag { get { return "NOA"; } }
public override string Description { get { return "Entis GLS engine resource archive"; } }
public override uint Signature { get { return 0x69746e45; } } // 'Enti'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (0, "Entis\x1a"))
return null;
uint id = file.View.ReadUInt32 (8);
if (0x02000400 != id)
return null;
var reader = new IndexReader (file);
if (!reader.ParseDirEntry (0x40, ""))
return null;
return new ArcFile (file, this, reader.Dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var nent = entry as NoaEntry;
if (null == nent || !arc.File.View.AsciiEqual (entry.Offset, "filedata"))
return arc.File.CreateStream (entry.Offset, entry.Size);
ulong size = arc.File.View.ReadUInt64 (entry.Offset+8);
if (size > uint.MaxValue)
throw new FileSizeException();
if (0 == nent.Encryption)
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
if (0x40000000 != nent.Encryption)
{
System.Diagnostics.Trace.WriteLine (string.Format ("{0}: unknown encryption scheme 0x{1:x8}",
nent.Name, nent.Encryption));
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
}
return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
}
internal class IndexReader
{
ArcView m_file;
List<Entry> m_dir = new List<Entry>();
const char PathSeparatorChar = '/';
public List<Entry> Dir { get { return m_dir; } }
public IndexReader (ArcView file)
{
m_file = file;
}
public bool ParseDirEntry (long dir_offset, string cur_dir)
{
if (!m_file.View.AsciiEqual (dir_offset, "DirEntry"))
return false;
long size = m_file.View.ReadInt64 (dir_offset+8);
if (size <= 0 || size > int.MaxValue)
return false;
if ((uint)size > m_file.View.Reserve (dir_offset+8, (uint)size))
return false;
long base_offset = dir_offset;
dir_offset += 0x10;
int count = m_file.View.ReadInt32 (dir_offset);
dir_offset += 4;
if (m_dir.Capacity < m_dir.Count+count)
m_dir.Capacity = m_dir.Count+count;
for (int i = 0; i < count; ++i)
{
var entry = new NoaEntry();
entry.Size = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 8;
entry.Attr = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
entry.Encryption = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
entry.Offset = base_offset + m_file.View.ReadInt64 (dir_offset);
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
dir_offset += 0x10;
uint extra_length = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
if (extra_length > 0 && 0 == (entry.Attr & 0x70))
{
entry.Extra = new byte[extra_length];
if (entry.Extra.Length != m_file.View.Read (dir_offset, entry.Extra, 0, extra_length))
return false;
}
dir_offset += extra_length;
uint name_length = m_file.View.ReadUInt32 (dir_offset);
dir_offset += 4;
string name = m_file.View.ReadString (dir_offset, name_length);
dir_offset += name_length;
if (string.IsNullOrEmpty (cur_dir))
entry.Name = name;
else
entry.Name = cur_dir + PathSeparatorChar + name;
if (0x10 == entry.Attr)
{
if (!ParseDirEntry (entry.Offset+0x10, entry.Name))
return false;
}
else if (0x20 == entry.Attr || 0x40 == entry.Attr)
{
break;
}
else
{
m_dir.Add (entry);
}
}
return true;
}
}
}
}