GARbro-mirror/ArcFormats/Yuka/ArcYKC.cs

180 lines
7.3 KiB
C#

//! \file ArcYKC.cs
//! \date Thu Aug 13 21:52:01 2015
//! \brief Yuka engine resource archives.
//
// Copyright (C) 2015 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using GameRes.Formats.Strings;
using GameRes.Utility;
namespace GameRes.Formats.Yuka
{
internal class YukaEntry : Entry
{
public uint NameOffset;
public uint NameLength;
}
[Export(typeof(ArchiveFormat))]
public class YkcOpener : ArchiveFormat
{
public override string Tag { get { return "YKC"; } }
public override string Description { get { return "Yuka engine resource archive"; } }
public override uint Signature { get { return 0x30434B59; } } // 'YKC0'
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return true; } }
public YkcOpener ()
{
Extensions = new string[] { "ykc", "dat" };
}
public override ArcFile TryOpen (ArcView file)
{
if (0x3130 != file.View.ReadUInt32 (4))
return null;
uint index_offset = file.View.ReadUInt32 (0x10);
uint index_length = file.View.ReadUInt32 (0x14);
int count = (int)(index_length / 0x14);
if (index_offset >= file.MaxOffset || !IsSaneCount (count))
return null;
if (index_length > file.View.Reserve (index_offset, index_length))
return null;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var entry = new YukaEntry();
entry.NameOffset = file.View.ReadUInt32 (index_offset);
entry.NameLength = file.View.ReadUInt32 (index_offset+4);
entry.Offset = file.View.ReadUInt32 (index_offset+8);
entry.Size = file.View.ReadUInt32 (index_offset+0xC);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x14;
}
// read in two cycles to avoid memory mapped file page switching when accessing names
foreach (YukaEntry entry in dir)
{
entry.Name = file.View.ReadString (entry.NameOffset, entry.NameLength);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (entry.Size < 0x24
|| !entry.Name.EndsWith (".yks", StringComparison.InvariantCultureIgnoreCase)
|| !arc.File.View.AsciiEqual (entry.Offset, "YKS001")
|| 1 != arc.File.View.ReadUInt16 (entry.Offset+6))
return arc.File.CreateStream (entry.Offset, entry.Size);
// decrypt script contents
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
uint text_offset = LittleEndian.ToUInt32 (data, 0x20);
for (uint i = text_offset; i < data.Length; ++i)
data[i] ^= 0xAA;
data[6] = 0;
return new MemoryStream (data);
}
public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
EntryCallback callback)
{
output.Position = 0x18;
int callback_count = 0;
foreach (var entry in list)
{
using (var file = File.OpenRead (entry.Name))
{
var file_size = file.Length;
if (file_size > uint.MaxValue)
throw new FileSizeException();
long file_offset = output.Position;
if (file_offset+file_size > uint.MaxValue)
throw new FileSizeException();
entry.Offset = file_offset;
entry.Size = (uint)file_size;
if (null != callback)
callback (callback_count++, entry, arcStrings.MsgAddingFile);
file.CopyTo (output);
}
}
if (null != callback)
callback (callback_count++, null, arcStrings.MsgWritingIndex);
byte[] name_buf = new byte[0x40];
var encoding = Encodings.cp932.WithFatalFallback();
int count = list.Count();
var name_offsets = new uint[count];
var name_sizes = new int[count];
int i = 0;
foreach (var entry in list)
{
int length = encoding.GetByteCount (entry.Name);
if (length+1 > name_buf.Length)
name_buf = new byte[length+2];
length = encoding.GetBytes (entry.Name, 0, entry.Name.Length, name_buf, 0);
name_buf[length++] = 0;
name_offsets[i] = (uint)output.Position;
output.Write (name_buf, 0, length);
name_sizes[i] = length;
++i;
if (output.Position > uint.MaxValue)
throw new FileSizeException();
}
uint index_offset = (uint)output.Position;
using (var writer = new BinaryWriter (output, encoding, true))
{
i = 0;
foreach (var entry in list)
{
writer.Write (name_offsets[i]);
writer.Write (name_sizes[i]);
writer.Write ((uint)entry.Offset);
writer.Write (entry.Size);
writer.Write (0);
++i;
}
uint index_length = (uint)(output.Position - index_offset);
output.Position = 0;
encoding.GetBytes ("YKC001\0\0", 0, 8, name_buf, 0);
writer.Write (name_buf, 0, 8);
writer.Write (0x18);
output.Position = 0x10;
writer.Write (index_offset);
writer.Write (index_length);
}
}
}
}