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128 lines
5.3 KiB
C#
128 lines
5.3 KiB
C#
//! \file ArcMAI.cs
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//! \date Sun May 03 09:26:58 2015
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//! \brief MAI archive format 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 System.Linq;
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using GameRes.Utility;
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namespace GameRes.Formats.MAI
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{
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[Export(typeof(ArchiveFormat))]
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public class ArcOpener : ArchiveFormat
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{
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public override string Tag { get { return "MAI"; } }
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public override string Description { get { return "MAI resource archive"; } }
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public override uint Signature { get { return 0x0a49414d; } } // 'MAI\x0a'
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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 ArcOpener ()
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{
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Extensions = new string[] { "arc" };
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}
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internal class DirEntry
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{
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public string Name;
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public int Index;
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}
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public override ArcFile TryOpen (ArcView file)
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{
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uint file_size = file.View.ReadUInt32 (4);
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if (file_size != file.MaxOffset)
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return null;
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int count = file.View.ReadInt32 (8);
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if (count <= 0 || count > 0xfffff)
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return null;
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int dir_level = file.View.ReadByte (0x0d);
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int dir_entries = file.View.ReadUInt16 (0x0e);
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uint index_offset = 0x10;
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uint index_size = (uint)(count * 0x18 + dir_entries * 8);
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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List<DirEntry> folders = null;
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if (0 != dir_entries && 2 == dir_level)
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{
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folders = new List<DirEntry> (dir_entries);
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uint dir_offset = index_offset + (uint)count*0x18;
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for (int i = 0; i < dir_entries; ++i)
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{
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folders.Add (new DirEntry {
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Name = file.View.ReadString (dir_offset, 4),
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Index = file.View.ReadInt32 (dir_offset+4)
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});
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dir_offset += 8;
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}
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}
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bool is_mask_arc = VFS.IsPathEqualsToFileName (file.Name, "mask.arc");
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var dir = new List<Entry> (count);
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int next_folder = null == folders ? count : folders[0].Index;
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int folder = 0;
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string current_folder = "";
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for (int i = 0; i < count; ++i)
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{
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while (i >= next_folder && folder < folders.Count)
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{
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current_folder = folders[folder++].Name;
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if (folders.Count == folder)
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next_folder = count;
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else
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next_folder = folders[folder].Index;
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}
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string name = file.View.ReadString (index_offset, 0x10);
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if (0 == name.Length)
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return null;
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var offset = file.View.ReadUInt32 (index_offset+0x10);
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var entry = new AutoEntry (Path.Combine (current_folder, name), () => {
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uint signature = file.View.ReadUInt32 (offset);
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if (is_mask_arc)
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return ImageFormat.FindByTag ("MSK/MAI");
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else if (0x4d43 == (signature & 0xffff)) // 'CM'
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return ImageFormat.FindByTag ("CM/MAI");
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else if (0x4d41 == (signature & 0xffff)) // 'AM'
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return ImageFormat.FindByTag ("AM/MAI");
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else if (0x4d42 == (signature & 0xffff)) // 'BM'
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return ImageFormat.Bmp;
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else if (signature != 0)
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return FormatCatalog.Instance.LookupSignature (signature).FirstOrDefault();
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else
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return null;
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});
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entry.Offset = offset;
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entry.Size = file.View.ReadUInt32 (index_offset+0x14);
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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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index_offset += 0x18;
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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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}
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