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283 lines
11 KiB
C#
283 lines
11 KiB
C#
//! \file ArcWILL.cs
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//! \date Fri Oct 31 13:37:11 2014
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//! \brief Will ARC archive format implementation.
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//
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// Copyright (C) 2014-2015 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.Formats.Properties;
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using GameRes.Formats.Strings;
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using GameRes.Utility;
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namespace GameRes.Formats.Will
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{
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internal class ExtRecord
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{
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public string Extension;
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public int FileCount;
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public uint DirOffset;
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}
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public class ArcOptions : ResourceOptions
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{
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public int NameLength { get; set; }
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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 "ARC/Will"; } }
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public override string Description { get { return "Will Co. game engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return true; } }
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ArcOpener ()
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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 ext_count = file.View.ReadInt32 (0);
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if (ext_count <= 0 || ext_count > 0xff)
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return null;
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uint dir_offset = 4;
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var ext_list = new List<ExtRecord> (ext_count);
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for (int i = 0; i < ext_count; ++i)
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{
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string ext = file.View.ReadString (dir_offset, 4).ToLowerInvariant();
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if (0 == ext.Length)
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return null;
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int count = file.View.ReadInt32 (dir_offset+4);
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uint offset = file.View.ReadUInt32 (dir_offset+8);
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if (count <= 0 || count > 0xffff || offset <= dir_offset || offset > file.MaxOffset)
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return null;
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ext_list.Add (new ExtRecord { Extension = ext, FileCount = count, DirOffset = offset });
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dir_offset += 12;
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}
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List<Entry> dir = null;
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try
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{
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dir = ReadFileList (file, ext_list, 9);
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}
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catch { /* ignore parse errors */ }
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if (null == dir)
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dir = ReadFileList (file, ext_list, 13);
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if (null == dir)
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return null;
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return new ArcFile (file, this, dir);
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}
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List<Entry> ReadFileList (ArcView file, IEnumerable<ExtRecord> ext_list, uint name_size)
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{
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var dir = new List<Entry>();
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foreach (var ext in ext_list)
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{
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dir.Capacity = dir.Count + ext.FileCount;
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uint dir_offset = ext.DirOffset;
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for (int i = 0; i < ext.FileCount; ++i)
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{
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string name = file.View.ReadString (dir_offset, name_size);
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if (string.IsNullOrEmpty (name))
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return null;
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name = name.ToLowerInvariant()+'.'+ext.Extension;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Size = file.View.ReadUInt32 (dir_offset+name_size);
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entry.Offset = file.View.ReadUInt32 (dir_offset+name_size+4);
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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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dir_offset += name_size+8;
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}
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}
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return 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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if (!IsScriptFile (entry.Name))
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return arc.File.CreateStream (entry.Offset, entry.Size);
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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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DecodeScript (data);
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return new MemoryStream (data);
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}
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private static void DecodeScript (byte[] data)
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{
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for (int i = 0; i < data.Length; ++i)
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{
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data[i] = Binary.RotByteR (data[i], 2);
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}
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}
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private static void EncodeScript (byte[] data)
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{
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for (int i = 0; i < data.Length; ++i)
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{
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data[i] = Binary.RotByteL (data[i], 2);
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}
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new ArcOptions { NameLength = Settings.Default.ARCNameLength };
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}
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public override object GetCreationWidget ()
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{
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return new GUI.CreateARCWidget();
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}
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internal class ArcEntry : Entry
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{
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public byte[] RawName;
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}
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internal class ArcDirectory
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{
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public byte[] Extension;
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public uint DirOffset;
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public List<ArcEntry> Files;
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}
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public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
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EntryCallback callback)
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{
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var arc_options = GetOptions<ArcOptions> (options);
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var encoding = Encodings.cp932.WithFatalFallback();
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int file_count = 0;
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var file_table = new SortedDictionary<string, ArcDirectory>();
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foreach (var entry in list)
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{
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string ext = Path.GetExtension (entry.Name).TrimStart ('.').ToUpperInvariant();
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if (string.IsNullOrEmpty (ext))
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throw new InvalidFileName (entry.Name, arcStrings.MsgNoExtension);
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if (ext.Length > 3)
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throw new InvalidFileName (entry.Name, arcStrings.MsgExtensionTooLong);
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string name = Path.GetFileNameWithoutExtension (entry.Name).ToUpperInvariant();
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byte[] raw_name = encoding.GetBytes (name);
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if (raw_name.Length > arc_options.NameLength)
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throw new InvalidFileName (entry.Name, arcStrings.MsgFileNameTooLong);
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ArcDirectory dir;
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if (!file_table.TryGetValue (ext, out dir))
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{
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byte[] raw_ext = encoding.GetBytes (ext);
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if (raw_ext.Length > 3)
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throw new InvalidFileName (entry.Name, arcStrings.MsgExtensionTooLong);
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dir = new ArcDirectory { Extension = raw_ext, Files = new List<ArcEntry>() };
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file_table[ext] = dir;
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}
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dir.Files.Add (new ArcEntry { Name = entry.Name, RawName = raw_name });
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++file_count;
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}
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if (null != callback)
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callback (file_count+1, null, null);
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int callback_count = 0;
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long dir_offset = 4 + file_table.Count * 12;
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long data_offset = dir_offset + (arc_options.NameLength + 9) * file_count;
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output.Position = data_offset;
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foreach (var ext in file_table.Keys)
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{
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var dir = file_table[ext];
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dir.DirOffset = (uint)dir_offset;
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dir_offset += (arc_options.NameLength + 9) * dir.Files.Count;
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foreach (var entry in dir.Files)
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{
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if (null != callback)
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callback (callback_count++, entry, arcStrings.MsgAddingFile);
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entry.Offset = data_offset;
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entry.Size = WriteEntry (entry.Name, output);
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data_offset += entry.Size;
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if (data_offset > uint.MaxValue)
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throw new FileSizeException();
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}
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}
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if (null != callback)
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callback (callback_count++, null, arcStrings.MsgWritingIndex);
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output.Position = 0;
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using (var header = new BinaryWriter (output, encoding, true))
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{
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byte[] buffer = new byte[arc_options.NameLength+1];
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header.Write (file_table.Count);
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foreach (var ext in file_table)
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{
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Buffer.BlockCopy (ext.Value.Extension, 0, buffer, 0, ext.Value.Extension.Length);
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for (int i = ext.Value.Extension.Length; i < 4; ++i)
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buffer[i] = 0;
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header.Write (buffer, 0, 4);
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header.Write (ext.Value.Files.Count);
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header.Write (ext.Value.DirOffset);
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}
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foreach (var ext in file_table)
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{
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foreach (var entry in ext.Value.Files)
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{
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Buffer.BlockCopy (entry.RawName, 0, buffer, 0, entry.RawName.Length);
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for (int i = entry.RawName.Length; i < buffer.Length; ++i)
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buffer[i] = 0;
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header.Write (buffer);
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header.Write (entry.Size);
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header.Write ((uint)entry.Offset);
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}
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}
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}
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}
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private uint WriteEntry (string filename, Stream output)
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{
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if (!IsScriptFile (filename))
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{
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using (var input = File.OpenRead (filename))
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{
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var size = input.Length;
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if (size > uint.MaxValue)
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throw new FileSizeException();
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input.CopyTo (output);
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return (uint)size;
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}
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}
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else
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{
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var input = File.ReadAllBytes (filename);
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EncodeScript (input);
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output.Write (input, 0, input.Length);
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return (uint)input.Length;
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}
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}
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private static bool IsScriptFile (string filename)
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{
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return filename.EndsWith (".scr", StringComparison.InvariantCultureIgnoreCase)
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|| filename.EndsWith (".wsc", StringComparison.InvariantCultureIgnoreCase);
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}
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}
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}
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