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https://github.com/crskycode/GARbro.git
synced 2026-07-08 01:30:18 +08:00
added various Strikes resource formats.
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morkt
225
ArcFormats/Ads/ArcPAC.cs
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225
ArcFormats/Ads/ArcPAC.cs
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//! \file ArcPAC.cs
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//! \date 2020 Mar 30
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//! \brief ads engine resource archive.
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//
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// Copyright (C) 2020 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 GameRes.Compression;
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namespace GameRes.Formats.Ads
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{
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internal class AdsEntry : PackedEntry
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{
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public int CompressionMethod;
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}
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[Export(typeof(ArchiveFormat))]
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public class PacOpener : ArchiveFormat
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{
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public override string Tag { get { return "PAC/ADS"; } }
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public override string Description { get { return "ads engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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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 PacOpener ()
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{
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ContainedFormats = new[] { "TGA", "TXT" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.Name.HasExtension (".pac"))
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return null;
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uint index_size = file.View.ReadUInt32 (0);
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if (index_size < 0x110 || index_size >= file.MaxOffset)
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return null;
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using (var reader = new IndexReader (file, index_size))
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{
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var dir = reader.ReadIndex();
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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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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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var pent = entry as AdsEntry;
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if (null == pent || pent.CompressionMethod != 1)
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return input;
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return new PackedStream<RleDecompressor> (input);
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}
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}
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internal class IndexReader : IDisposable
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{
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ArcViewStream m_input;
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List<Entry> m_dir;
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readonly long m_max_offset;
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public IndexReader (ArcView file, uint index_size)
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{
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m_input = file.CreateStream (0, index_size);
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m_dir = new List<Entry>();
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m_max_offset = file.MaxOffset;
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}
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bool ReadDir (uint dir_offset, string dir_name)
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{
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m_input.Position = dir_offset;
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int dir_count = m_input.ReadInt32();
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if (dir_count < 0 || dir_count > 0x200)
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return false;
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int file_count = m_input.ReadInt32();
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if (file_count < 0 || file_count > 0x40000)
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return false;
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if (string.IsNullOrEmpty (dir_name))
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{
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var root_name = ReadCString();
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if (string.IsNullOrWhiteSpace (root_name))
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return false;
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}
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m_dir.Capacity = m_dir.Count + file_count;
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for (int j = 0; j < file_count; ++j)
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{
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var name = ReadCString();
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if (string.IsNullOrWhiteSpace (name))
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return false;
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if (dir_name.Length > 0)
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name = dir_name + '/' + name;
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var entry = new AdsEntry { Name = name };
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entry.Type = FormatCatalog.Instance.GetTypeFromName (name);
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entry.Size = m_input.ReadUInt32();
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entry.Offset = m_input.ReadUInt32();
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if (!entry.CheckPlacement (m_max_offset))
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return false;
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entry.CompressionMethod = m_input.ReadInt32();
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entry.IsPacked = entry.CompressionMethod != 0;
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m_dir.Add (entry);
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}
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for (int j = 0; j < dir_count; ++j)
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{
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uint offset = m_input.ReadUInt32();
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if (offset >= m_input.Length)
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return false;
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var name = ReadCString();
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if (string.IsNullOrWhiteSpace (name))
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return false;
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if (dir_name.Length > 0)
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name = dir_name + '/' + name;
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var current_pos = m_input.Position;
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if (!ReadDir (offset, name))
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return false;
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m_input.Position = current_pos;
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}
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return true;
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}
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public List<Entry> ReadIndex ()
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{
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if (!ReadDir (4, ""))
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return null;
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return m_dir;
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}
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byte[] m_buffer = new byte[0x104];
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internal string ReadCString ()
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{
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int length = m_input.Read (m_buffer, 0, 0x104);
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int end = 0;
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while (end < length && m_buffer[end] != 0)
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{
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m_buffer[end++] ^= 0xFF;
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}
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return Encodings.cp932.GetString (m_buffer, 0, end);
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}
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#region IDisposable Members
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_input.Dispose();
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m_disposed = true;
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}
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}
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#endregion
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}
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internal sealed class RleDecompressor : Decompressor
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{
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Stream m_input;
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public override void Initialize (Stream input)
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{
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m_input = input;
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}
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protected override IEnumerator<int> Unpack ()
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{
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var buffer = new byte[8];
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int chunk_size = 3;
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for (;;)
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{
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int ctl = m_input.ReadByte();
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if (-1 == ctl)
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yield break;
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if (ctl != 0)
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{
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if (m_input.Read (buffer, 4, 4) != 4)
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yield break;
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int count = buffer.ToInt32 (4) - 1;
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while (count --> 0)
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{
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for (int i = 0; i < chunk_size; ++i)
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{
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m_buffer[m_pos++] = buffer[i];
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if (0 == --m_length)
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yield return m_pos;
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}
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}
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}
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else
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{
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chunk_size = m_input.Read (buffer, 0, 3);
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if (0 == chunk_size)
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yield break;
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for (int i = 0; i < chunk_size; ++i)
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{
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m_buffer[m_pos++] = buffer[i];
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if (0 == --m_length)
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yield return m_pos;
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}
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}
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}
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}
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}
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}
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