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160 lines
6.5 KiB
C#
160 lines
6.5 KiB
C#
//! \file ArcNOA.cs
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//! \date Thu Apr 23 15:57:17 2015
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//! \brief Entis GLS engine archives implementation.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Utility;
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namespace GameRes.Formats.Entis
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{
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internal class NoaEntry : Entry
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{
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public byte[] Extra;
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public uint Encryption;
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public uint Attr;
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}
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[Export(typeof(ArchiveFormat))]
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public class NoaOpener : ArchiveFormat
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{
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public override string Tag { get { return "NOA"; } }
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public override string Description { get { return "Entis GLS engine resource archive"; } }
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public override uint Signature { get { return 0x69746e45; } } // 'Enti'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (0, "Entis\x1a"))
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return null;
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uint id = file.View.ReadUInt32 (8);
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if (0x02000400 != id)
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return null;
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var reader = new IndexReader (file);
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if (!reader.ParseDirEntry (0x40, ""))
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return null;
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return new ArcFile (file, this, reader.Dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var nent = entry as NoaEntry;
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if (null == nent || !arc.File.View.AsciiEqual (entry.Offset, "filedata"))
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return arc.File.CreateStream (entry.Offset, entry.Size);
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ulong size = arc.File.View.ReadUInt64 (entry.Offset+8);
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if (size > uint.MaxValue)
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throw new FileSizeException();
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if (0 == nent.Encryption)
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return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
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if (0x40000000 != nent.Encryption)
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{
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System.Diagnostics.Trace.WriteLine (string.Format ("{0}: unknown encryption scheme 0x{1:x8}",
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nent.Name, nent.Encryption));
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return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
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}
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return arc.File.CreateStream (entry.Offset+0x10, (uint)size);
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}
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internal class IndexReader
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{
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ArcView m_file;
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List<Entry> m_dir = new List<Entry>();
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const char PathSeparatorChar = '/';
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public List<Entry> Dir { get { return m_dir; } }
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public IndexReader (ArcView file)
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{
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m_file = file;
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}
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public bool ParseDirEntry (long dir_offset, string cur_dir)
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{
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if (!m_file.View.AsciiEqual (dir_offset, "DirEntry"))
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return false;
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long size = m_file.View.ReadInt64 (dir_offset+8);
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if (size <= 0 || size > int.MaxValue)
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return false;
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if ((uint)size > m_file.View.Reserve (dir_offset+8, (uint)size))
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return false;
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long base_offset = dir_offset;
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dir_offset += 0x10;
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int count = m_file.View.ReadInt32 (dir_offset);
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dir_offset += 4;
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if (m_dir.Capacity < m_dir.Count+count)
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m_dir.Capacity = m_dir.Count+count;
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for (int i = 0; i < count; ++i)
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{
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var entry = new NoaEntry();
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entry.Size = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 8;
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entry.Attr = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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entry.Encryption = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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entry.Offset = base_offset + m_file.View.ReadInt64 (dir_offset);
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return false;
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dir_offset += 0x10;
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uint extra_length = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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if (extra_length > 0 && 0 == (entry.Attr & 0x70))
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{
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entry.Extra = new byte[extra_length];
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if (entry.Extra.Length != m_file.View.Read (dir_offset, entry.Extra, 0, extra_length))
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return false;
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}
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dir_offset += extra_length;
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uint name_length = m_file.View.ReadUInt32 (dir_offset);
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dir_offset += 4;
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string name = m_file.View.ReadString (dir_offset, name_length);
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dir_offset += name_length;
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if (string.IsNullOrEmpty (cur_dir))
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entry.Name = name;
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else
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entry.Name = cur_dir + PathSeparatorChar + name;
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if (0x10 == entry.Attr)
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{
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if (!ParseDirEntry (entry.Offset+0x10, entry.Name))
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return false;
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}
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else if (0x20 == entry.Attr || 0x40 == entry.Attr)
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{
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break;
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}
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else
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{
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m_dir.Add (entry);
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}
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}
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return true;
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}
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}
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}
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}
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