GARbro-mirror/ArcFormats/Bishop/ArcBSA.cs

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//! \file ArcBSA.cs
//! \date Sat Oct 24 15:58:06 2015
//! \brief Bishop BSA 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.Utility;
namespace GameRes.Formats.Bishop
{
[Export(typeof(ArchiveFormat))]
public class BsaOpener : ArchiveFormat
{
public override string Tag { get { return "BSA"; } }
public override string Description { get { return "Bishop resource archive"; } }
public override uint Signature { get { return 0x72415342; } } // 'BSAr'
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if ('c' != file.View.ReadInt16 (4))
return null;
int version = file.View.ReadInt16 (8);
if (version < 1 || version > 3)
return null;
int count = file.View.ReadInt16 (0xA);
if (!IsSaneCount (count))
return null;
uint index_offset = file.View.ReadUInt32 (0xC);
if (index_offset >= file.MaxOffset)
return null;
var reader = new IndexReader (file);
List<Entry> dir = null;
if (version > 1)
dir = reader.ReadV2 (count, index_offset);
if (null == dir)
dir = reader.ReadV1 (count, index_offset);
if (null == dir)
return null;
return new ArcFile (file, this, dir);
}
}
internal sealed class IndexReader
{
ArcView m_file;
List<Entry> m_dir;
List<string> m_path;
public IndexReader (ArcView file)
{
m_file = file;
m_dir = new List<Entry>();
m_path = new List<string>();
}
public List<Entry> ReadV1 (int count, uint index_offset)
{
m_file.View.Reserve (index_offset, (uint)(m_file.MaxOffset - index_offset));
m_dir.Capacity = count;
m_dir.Clear();
m_path.Clear();
for (int i = 0; i < count; ++i)
{
string name = m_file.View.ReadString (index_offset, 0x20);
if (0 == name.Length)
return null;
if ('>' == name[0])
{
m_path.Add (name.Substring (1));
}
else if ('<' == name[0])
{
if (m_path.Count > 0)
m_path.RemoveAt (m_path.Count-1);
}
else
{
if (m_path.Count > 0)
name = Path.Combine (GetPathName (name).ToArray());
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = m_file.View.ReadUInt32 (index_offset+0x20);
entry.Size = m_file.View.ReadUInt32 (index_offset+0x24);
if (!entry.CheckPlacement (m_file.MaxOffset))
return null;
m_dir.Add (entry);
}
index_offset += 0x28;
}
return m_dir;
}
public List<Entry> ReadV2 (int count, uint index_offset)
{
m_file.View.Reserve (index_offset, (uint)(m_file.MaxOffset - index_offset));
m_dir.Capacity = count;
m_dir.Clear();
m_path.Clear();
uint filenames_offset = index_offset + (uint)(count * 12);
byte[] names_buf = new byte[m_file.MaxOffset - filenames_offset];
m_file.View.Read (filenames_offset, names_buf, 0, (uint)names_buf.Length);
for (int i = 0; i < count; ++i)
{
int name_offset = m_file.View.ReadInt32 (index_offset);
if (name_offset >= names_buf.Length)
return null;
string name = Binary.GetCString (names_buf, name_offset, names_buf.Length-name_offset);
if (0 == name.Length)
return null;
if ('>' == name[0])
{
m_path.Add (name.Substring (1));
}
else if ('<' == name[0])
{
if (m_path.Count > 0)
m_path.RemoveAt (m_path.Count-1);
}
else
{
if (m_path.Count > 0)
name = Path.Combine (GetPathName (name).ToArray());
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = m_file.View.ReadUInt32 (index_offset+4);
entry.Size = m_file.View.ReadUInt32 (index_offset+8);
if (!entry.CheckPlacement (m_file.MaxOffset))
return null;
m_dir.Add (entry);
}
index_offset += 0xC;
}
return m_dir;
}
IEnumerable<string> GetPathName (string name)
{
foreach (var dir in m_path)
yield return dir;
yield return name;
}
}
}