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AdvCls archives are a subset of Rpm archives.

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morkt 2015-09-20 05:26:38 +04:00
parent 888b81572b
commit 61aa5cd1c2
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ArcFormats/ArcAdvCls.cs
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//! \file ArcAdvCls.cs
//! \date Sun Jul 05 04:42:34 2015
//! \brief AdvCls engine resource archive.
//
// 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.Text;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.AdvCls
{
[Export(typeof(ArchiveFormat))]
public class ArcOpener : ArchiveFormat
{
public override string Tag { get { return "ARC/AdvCls"; } }
public override string Description { get { return "AdvCls engine resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public ArcOpener ()
{
Extensions = new string[] { "arc" };
}
static readonly string KnownKey = "kimiomo"; // "Kimi no Omoi, Sono Negai"
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0);
if (count <= 0 || count > 0xfffff)
return null;
int compressed = file.View.ReadInt32 (4);
if (0 != compressed && 1 != compressed)
return null;
var index = new byte[count*0x24];
if (index.Length != file.View.Read (8, index, 0, (uint)index.Length))
return null;
DecryptIndex (index, KnownKey);
int index_offset = 0;
int data_offset = index.Length + 8;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
string name = Binary.GetCString (index, index_offset, 0x18);
var entry = new PackedEntry {
Name = name,
Type = FormatCatalog.Instance.GetTypeFromName (name),
IsPacked = compressed != 0,
};
index_offset += 0x18;
entry.UnpackedSize = LittleEndian.ToUInt32 (index, index_offset);
entry.Size = LittleEndian.ToUInt32 (index, index_offset+4);
entry.Offset = LittleEndian.ToUInt32 (index, index_offset+8);
if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0xC;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var packed = entry as PackedEntry;
if (null == packed || !packed.IsPacked)
return input;
return new LzssStream (input);
}
private void DecryptIndex (byte[] data, string key)
{
int k = 0;
for (int i = 0; i < data.Length; ++i)
{
data[i] += (byte)key[k++];
if (key.Length == k)
k = 0;
}
}
}
}