From f929504e918e76f90a5d254f1ddebfc617c09c78 Mon Sep 17 00:00:00 2001 From: morkt Date: Tue, 21 Apr 2015 03:39:17 +0400 Subject: [PATCH] implemented AST script engine archives. --- ArcFormats/ArcAST.cs | 136 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 ArcFormats/ArcAST.cs diff --git a/ArcFormats/ArcAST.cs b/ArcFormats/ArcAST.cs new file mode 100644 index 00000000..d41aa47e --- /dev/null +++ b/ArcFormats/ArcAST.cs @@ -0,0 +1,136 @@ +//! \file ArcAST.cs +//! \date Tue Apr 21 02:24:20 2015 +//! \brief AST script engine resource 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 GameRes.Utility; + +namespace GameRes.Formats.AST +{ + internal class AstArchive : ArcFile + { + public AstArchive (ArcView arc, ArchiveFormat impl, ICollection dir) + : base (arc, impl, dir) + { + } + } + + [Export(typeof(ArchiveFormat))] + public class ArcOpener : ArchiveFormat + { + public override string Tag { get { return "AST"; } } + public override string Description { get { return "AST script engine resource archive"; } } + public override uint Signature { get { return 0x32435241; } } // 'ARC2' + public override bool IsHierarchic { get { return true; } } + public override bool CanCreate { get { return false; } } + + public ArcOpener () + { + Extensions = new string[] { "" }; + Signatures = new uint[] { 0x32435241, 0x31435241 }; // 'ARC2', 'ARC1' + } + + public override ArcFile TryOpen (ArcView file) + { + int version = file.View.ReadByte (3) - 0x30; + int count = file.View.ReadInt32 (4); + if (count <= 0 || count > 0xfffff) + return null; + var name_buf = new byte[32]; + var dir = new List (count); + long index_offset = 8; + uint next_offset = file.View.ReadUInt32 (index_offset); + for (int i = 0; i < count; ++i) + { + uint offset = next_offset; + uint size = file.View.ReadUInt32 (index_offset+4); + int name_length = file.View.ReadByte (index_offset+8); + if (name_length > name_buf.Length) + name_buf = new byte[name_length]; + file.View.Read (index_offset+9, name_buf, 0, (uint)name_length); + if (2 == version) + for (int j = 0; j < name_length; ++j) + name_buf[j] ^= 0xff; + if (i+1 == count) + next_offset = (uint)file.MaxOffset; + else + next_offset = file.View.ReadUInt32 (index_offset+9+name_length); + if (next_offset < offset) + return null; + string name = Encodings.cp932.GetString (name_buf, 0, name_length); + var entry = new PackedEntry + { + Name = name, + Type = FormatCatalog.Instance.GetTypeFromName (name), + Offset = offset, + Size = next_offset - offset, + UnpackedSize = size, + }; + if (!entry.CheckPlacement (file.MaxOffset)) + return null; + dir.Add (entry); + index_offset += 9 + name_length; + } + if (2 == version) + return new AstArchive (file, this, dir); + else + return new ArcFile (file, this, dir); + } + + public override Stream OpenEntry (ArcFile arc, Entry entry) + { + var pent = entry as PackedEntry; + if (null == pent || !(arc is AstArchive)) + return arc.File.CreateStream (entry.Offset, entry.Size); + if (pent.Size == pent.UnpackedSize) + { + arc.File.View.Reserve (entry.Offset, entry.Size); + var sig = arc.File.View.ReadUInt32 (entry.Offset); + if (0xb8b1af76 == sig) + { + var data = new byte[entry.Size]; + arc.File.View.Read (entry.Offset, data, 0, entry.Size); + for (int i = 0; i < data.Length; ++i) + data[i] ^= 0xff; + return new MemoryStream (data); + } + return arc.File.CreateStream (entry.Offset, entry.Size); + } + using (var input = arc.File.CreateStream (entry.Offset, entry.Size)) + using (var reader = new LzssReader (input, (int)pent.Size, (int)pent.UnpackedSize)) + { + reader.Unpack(); + var data = reader.Data; + if (!Binary.AsciiEqual (data, 0, "RIFF") && + !Binary.AsciiEqual (data, 0, "OggS")) + for (int i = 0; i < data.Length; ++i) + data[i] ^= 0xff; + return new MemoryStream (data); + } + } + } +}