mirror of
https://github.com/crskycode/GARbro.git
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f1d66206bc
(ArchiveFormat.CanCreate): renamed to CanWrite.
169 lines
6.3 KiB
C#
169 lines
6.3 KiB
C#
//! \file ArcBSA.cs
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//! \date Sat Oct 24 15:58:06 2015
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//! \brief Bishop BSA archives.
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//
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// Copyright (C) 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 System.Linq;
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using GameRes.Utility;
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namespace GameRes.Formats.Bishop
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{
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[Export(typeof(ArchiveFormat))]
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public class BsaOpener : ArchiveFormat
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{
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public override string Tag { get { return "BSA"; } }
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public override string Description { get { return "Bishop resource archive"; } }
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public override uint Signature { get { return 0x72415342; } } // 'BSAr'
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public override bool IsHierarchic { get { return true; } }
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public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if ('c' != file.View.ReadInt16 (4))
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return null;
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int version = file.View.ReadInt16 (8);
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if (version < 1 || version > 3)
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return null;
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int count = file.View.ReadInt16 (0xA);
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if (!IsSaneCount (count))
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return null;
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uint index_offset = file.View.ReadUInt32 (0xC);
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if (index_offset >= file.MaxOffset)
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return null;
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var reader = new IndexReader (file);
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List<Entry> dir = null;
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if (version > 1)
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dir = reader.ReadV2 (count, index_offset);
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if (null == dir)
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dir = reader.ReadV1 (count, index_offset);
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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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}
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internal sealed class IndexReader
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{
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ArcView m_file;
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List<Entry> m_dir;
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List<string> m_path;
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public IndexReader (ArcView file)
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{
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m_file = file;
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m_dir = new List<Entry>();
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m_path = new List<string>();
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}
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public List<Entry> ReadV1 (int count, uint index_offset)
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{
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m_file.View.Reserve (index_offset, (uint)(m_file.MaxOffset - index_offset));
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m_dir.Capacity = count;
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m_dir.Clear();
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m_path.Clear();
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for (int i = 0; i < count; ++i)
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{
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string name = m_file.View.ReadString (index_offset, 0x20);
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if (0 == name.Length)
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return null;
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if ('>' == name[0])
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{
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m_path.Add (name.Substring (1));
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}
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else if ('<' == name[0])
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{
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if (m_path.Count > 0)
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m_path.RemoveAt (m_path.Count-1);
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}
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else
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{
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if (m_path.Count > 0)
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name = Path.Combine (GetPathName (name).ToArray());
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = m_file.View.ReadUInt32 (index_offset+0x20);
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entry.Size = m_file.View.ReadUInt32 (index_offset+0x24);
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return null;
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m_dir.Add (entry);
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}
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index_offset += 0x28;
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}
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return m_dir;
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}
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public List<Entry> ReadV2 (int count, uint index_offset)
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{
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m_file.View.Reserve (index_offset, (uint)(m_file.MaxOffset - index_offset));
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m_dir.Capacity = count;
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m_dir.Clear();
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m_path.Clear();
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uint filenames_offset = index_offset + (uint)(count * 12);
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byte[] names_buf = new byte[m_file.MaxOffset - filenames_offset];
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m_file.View.Read (filenames_offset, names_buf, 0, (uint)names_buf.Length);
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for (int i = 0; i < count; ++i)
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{
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int name_offset = m_file.View.ReadInt32 (index_offset);
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if (name_offset >= names_buf.Length)
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return null;
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string name = Binary.GetCString (names_buf, name_offset, names_buf.Length-name_offset);
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if (0 == name.Length)
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return null;
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if ('>' == name[0])
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{
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m_path.Add (name.Substring (1));
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}
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else if ('<' == name[0])
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{
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if (m_path.Count > 0)
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m_path.RemoveAt (m_path.Count-1);
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}
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else
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{
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if (m_path.Count > 0)
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name = Path.Combine (GetPathName (name).ToArray());
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = m_file.View.ReadUInt32 (index_offset+4);
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entry.Size = m_file.View.ReadUInt32 (index_offset+8);
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return null;
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m_dir.Add (entry);
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}
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index_offset += 0xC;
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}
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return m_dir;
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}
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IEnumerable<string> GetPathName (string name)
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{
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foreach (var dir in m_path)
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yield return dir;
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yield return name;
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}
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}
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}
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