GARbro-mirror/Legacy/Marron/ArcCPN.cs

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2018-02-16 23:47:52 +08:00
//! \file ArcCPN.cs
//! \date 2018 Feb 14
//! \brief Marron resource archive.
//
// Copyright (C) 2018 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.RegularExpressions;
// [010727][Marron] Cosmos no Sora ni
namespace GameRes.Formats.Marron
{
internal class CpnArchive : ArcFile
{
public readonly byte Key;
public CpnArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte key)
: base (arc, impl, dir)
{
Key = key;
}
}
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
public override string Tag { get { return "DAT/CPN"; } }
public override string Description { get { return "Marron resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
static readonly Regex CpnEntryRe = new Regex (@"#(?:\./)?(?<name>[^$]+)\$(?<offset>\d+)\*(?<size>\d+)\+");
public override ArcFile TryOpen (ArcView file)
{
if (!file.Name.HasExtension (".dat"))
return null;
var cpn_name = Path.ChangeExtension (file.Name, ".cpn");
if (!VFS.FileExists (cpn_name))
return null;
byte key;
string cpn_index;
using (var cpn = VFS.OpenView (cpn_name))
{
key = cpn.View.ReadByte (0);
var cpn_data = cpn.View.ReadBytes (1, (uint)(cpn.MaxOffset - 1));
for (int i = 0; i < cpn_data.Length; ++i)
cpn_data[i] ^= key;
cpn_index = Encodings.cp932.GetString (cpn_data);
}
int idx = cpn_index.IndexOf ('#', 1);
if (idx <= 1)
return null;
var data_name = cpn_index.Substring (1, idx-1);
if (!VFS.IsPathEqualsToFileName (file.Name, data_name))
return null;
var dir = new List<Entry>();
var match = CpnEntryRe.Match (cpn_index, idx);
while (match.Success)
{
var name = match.Groups["name"].Value;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = UInt32.Parse (match.Groups["offset"].Value);
entry.Size = UInt32.Parse (match.Groups["size"].Value);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
match = match.NextMatch();
}
if (0 == dir.Count)
return null;
return new CpnArchive (file, this, dir, key);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var carc = arc as CpnArchive;
if (null == carc)
return input;
return new XoredStream (input, carc.Key);
}
}
}