//! \file ArcPAC.cs //! \date 2018 Sep 18 //! \brief Digital Works 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.Collections.Generic; using System.ComponentModel.Composition; using System.IO; using GameRes.Compression; namespace GameRes.Formats.DigitalWorks { [Export(typeof(ArchiveFormat))] public class PacOpener : ArchiveFormat { public override string Tag { get { return "PAC/HED"; } } public override string Description { get { return "Digital Works resource archive"; } } public override uint Signature { get { return 0x43415050; } } // 'PPAC-PAC' public override bool IsHierarchic { get { return false; } } public override bool CanWrite { get { return false; } } public override ArcFile TryOpen (ArcView file) { if (!file.View.AsciiEqual (4, "-PAC")) return null; var hed_name = Path.ChangeExtension (file.Name, "hed"); if (!VFS.FileExists (hed_name)) return null; using (var hed = VFS.OpenView (hed_name)) { if (!hed.View.AsciiEqual (0, "PPAC-HED")) return null; uint index_offset = 0x10; const uint data_offset = 0x10; int count = (int)(hed.MaxOffset - index_offset) / 0x20; if (!IsSaneCount (count)) return null; var dir = new List<Entry> (count); while (index_offset+0x20 <= hed.MaxOffset) { var name = hed.View.ReadString (index_offset, 0x10); var entry = FormatCatalog.Instance.Create<PackedEntry> (name); entry.Offset = hed.View.ReadUInt32 (index_offset+0x10) + data_offset; entry.Size = hed.View.ReadUInt32 (index_offset+0x14); if (!entry.CheckPlacement (file.MaxOffset)) return null; dir.Add (entry); index_offset += 0x20; } return new ArcFile (file, this, dir); } } public override Stream OpenEntry (ArcFile arc, Entry entry) { var pent = entry as PackedEntry; if (null == pent) return base.OpenEntry (arc, entry); if (!pent.IsPacked) { if (!arc.File.View.AsciiEqual (entry.Offset, "LZS\0")) return base.OpenEntry (arc, entry); pent.IsPacked = true; pent.UnpackedSize = arc.File.View.ReadUInt32 (entry.Offset+4); } var input = arc.File.CreateStream (entry.Offset+8, entry.Size-8); bool embedded_lzs = (input.Signature & ~0xF0u) == 0x535A4C0F; // 'LZS' var lzs = new LzssStream (input); if (embedded_lzs) { var header = new byte[8]; lzs.Read (header, 0, 8); pent.UnpackedSize = header.ToUInt32 (4); lzs = new LzssStream (lzs); } return lzs; } } }