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101 lines
4.2 KiB
C#
101 lines
4.2 KiB
C#
//! \file ArcPAK.cs
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//! \date Sat May 21 00:12:14 2016
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//! \brief MAGI resource archive.
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//
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// Copyright (C) 2016 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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namespace GameRes.Formats.Magi
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{
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// this format is very similar to NitroPlus.PakOpener v3, but has no encryption.
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//
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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{
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public override string Tag { get { return "PAK/MAGI"; } }
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public override string Description { get { return "MAGI resource archive"; } }
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public override uint Signature { get { return 3; } }
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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 override ArcFile TryOpen (ArcView file)
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{
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int count = file.View.ReadInt32 (4);
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if (!IsSaneCount (count))
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return null;
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uint index_size = file.View.ReadUInt32 (0xC);
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if (index_size < 2 || index_size > file.MaxOffset)
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return null;
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long base_offset = 0x118 + index_size;
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using (var mem = file.CreateStream (0x118, index_size))
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using (var z = new ZLibStream (mem, CompressionMode.Decompress))
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using (var index = new BinaryReader (z))
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{
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var name_buffer = new byte[0x100];
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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int name_length = index.ReadInt32();
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if (name_length <= 0 || name_length > name_buffer.Length)
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return null;
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if (name_length != index.Read (name_buffer, 0, name_length))
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return null;
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var name = Encodings.cp932.GetString (name_buffer, 0, name_length);
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var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
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entry.Offset = index.ReadUInt32() + base_offset;
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entry.UnpackedSize = index.ReadUInt32();
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index.ReadUInt32();
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uint is_packed = index.ReadUInt32();
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uint packed_size = index.ReadUInt32();
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entry.IsPacked = is_packed != 0 && packed_size != 0;
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if (entry.IsPacked)
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entry.Size = packed_size;
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else
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entry.Size = entry.UnpackedSize;
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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}
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return new ArcFile (file, this, dir);
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}
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
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var pentry = entry as PackedEntry;
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if (null != pentry || pentry.IsPacked)
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input = new ZLibStream (input, CompressionMode.Decompress);
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return input;
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}
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}
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}
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