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101 lines
4.3 KiB
C#
101 lines
4.3 KiB
C#
//! \file ArcAi6Win.cs
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//! \date Sat Nov 28 12:44:51 2015
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//! \brief Ai6Win engine resource archive
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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.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Silky
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{
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[Export(typeof(ArchiveFormat))]
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public class Ai6Opener : ArchiveFormat
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{
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public override string Tag { get { return "ARC/AI6WIN"; } }
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public override string Description { get { return "AI6WIN engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return true; } }
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public override bool CanWrite { get { return false; } }
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public Ai6Opener ()
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{
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Extensions = new string[] { "arc" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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int count = file.View.ReadInt32 (0);
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if (!IsSaneCount (count))
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return null;
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long index_offset = 4;
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uint index_size = (uint)(count * (0x104 + 12));
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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var name_buffer = new byte[0x104];
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var dir = new List<Entry>();
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for (int i = 0; i < count; ++i)
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{
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file.View.Read (index_offset, name_buffer, 0, (uint)name_buffer.Length);
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int name_length = Array.IndexOf<byte> (name_buffer, 0);
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if (0 == name_length)
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return null;
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if (-1 == name_length)
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name_length = name_buffer.Length;
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byte key = (byte)(name_length+1);
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for (int j = 0; j < name_length; ++j)
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{
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name_buffer[j] -= key--;
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char c = (char)name_buffer[j];
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if (VFS.InvalidFileNameChars.Contains (c) && c != '/')
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return null;
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}
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var name = Encodings.cp932.GetString (name_buffer, 0, name_length);
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index_offset += 0x104;
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var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
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entry.Size = Binary.BigEndian (file.View.ReadUInt32 (index_offset));
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entry.UnpackedSize = Binary.BigEndian (file.View.ReadUInt32 (index_offset+4));
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entry.Offset = Binary.BigEndian (file.View.ReadUInt32 (index_offset+8));
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if (entry.Offset < index_size+4 || !entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.IsPacked = entry.Size != entry.UnpackedSize;
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dir.Add (entry);
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index_offset += 12;
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}
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return new ArcFile (file, this, 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 pent = entry as PackedEntry;
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if (null == pent || !pent.IsPacked)
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return base.OpenEntry (arc, entry);
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return new LzssStream (input);
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}
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}
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}
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