GARbro-mirror/Legacy/Uran/ArcNCL.cs

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2018-01-07 05:33:26 +08:00
//! \file ArcNCL.cs
//! \date 2018 Jan 05
//! \brief Uran resource archive.
//
// Copyright (C) 2018 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.Compression;
namespace GameRes.Formats.Uran
{
internal class NclEntry : PackedEntry
{
public byte Method;
}
#if DEBUG
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[Export(typeof(ArchiveFormat))]
#endif
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public class NclOpener : ArchiveFormat
{
public override string Tag { get { return "NCL"; } }
public override string Description { get { return "Uran resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.HasExtension (".ncl") || file.MaxOffset > uint.MaxValue)
return null;
long offset = 0;
var dir = new List<Entry>();
while (offset < file.MaxOffset)
{
uint size = file.View.ReadUInt32 (offset);
if (0 == size)
break;
uint unpacked_size = file.View.ReadUInt32 (offset+4);
uint name_length = file.View.ReadUInt16 (offset+8);
if (0 == name_length || name_length > 0x100)
return null;
var name = file.View.ReadString (offset+10, name_length);
offset += 10 + name_length;
var entry = FormatCatalog.Instance.Create<NclEntry> (name);
entry.Size = size;
entry.UnpackedSize = unpacked_size;
uint header_size = file.View.ReadUInt16 (offset+4);
offset += 6 + header_size;
entry.Offset = offset;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.Method = (byte)(file.View.ReadByte (offset) - 10);
entry.IsPacked = entry.Method != 1;
entry.Offset++;
entry.Size--;
dir.Add (entry);
offset += size;
}
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
input = new NclSubStream (input, 10);
var nclent = entry as NclEntry;
if (nclent != null && nclent.IsPacked)
{
if (2 == nclent.Method)
input = new ZLibStream (input, CompressionMode.Decompress);
else if (3 == nclent.Method)
{
// XXX bzip2 compression not implemented
}
}
return input;
}
}
public class NclSubStream : InputProxyStream
{
private byte m_key;
public NclSubStream (Stream stream, byte key, bool leave_open = false)
: base (stream, leave_open)
{
m_key = key;
}
#region System.IO.Stream methods
public override int Read (byte[] buffer, int offset, int count)
{
int read = BaseStream.Read (buffer, offset, count);
for (int i = 0; i < read; ++i)
{
buffer[offset+i] -= m_key;
}
return read;
}
public override int ReadByte ()
{
int b = BaseStream.ReadByte();
if (-1 != b)
{
b -= m_key;
}
return b;
}
#endregion
}
}