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//! \file ArcArchAngel.cs
//! \date 2022 May 01
//! \brief ArchAngel engine resource archive.
//
// Copyright (C) 2022 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;
namespace GameRes.Formats.ArchAngel
{
[Export(typeof(ArchiveFormat))]
public class DatOpener : ArchiveFormat
{
public override string Tag { get { return "DAT/ARCH"; } }
public override string Description { get { return "ArchAngel engine resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public DatOpener ()
{
ContainedFormats = new[] { "CB" };
}
static readonly string[] DefaultSections = { "image", "script", null };
public override ArcFile TryOpen (ArcView file)
{
if (file.MaxOffset > uint.MaxValue
|| !VFS.IsPathEqualsToFileName (file.Name, "ARCHPAC.DAT"))
return null;
int file_count = file.View.ReadInt16 (0);
if (!IsSaneCount (file_count))
return null;
uint index_pos = 2;
var size_table = new uint[file_count];
for (int i = 0; i < file_count; ++i)
{
size_table[i] = file.View.ReadUInt32 (index_pos);
index_pos += 4;
}
var section_table = new SortedDictionary<int, uint>();
uint min_offset = (uint)file.MaxOffset;
while (index_pos + 6 <= min_offset)
{
uint offset = file.View.ReadUInt32 (index_pos);
int index = file.View.ReadInt16 (index_pos+4);
if (index < 0 || index > file_count || offset > file.MaxOffset)
return null;
if (offset < min_offset)
min_offset = offset;
section_table[index] = offset;
index_pos += 6;
}
var dir = new List<Entry> (file_count);
int section_num = 0;
foreach (var section in section_table)
{
int i = section.Key;
uint base_offset = section.Value;
do
{
uint size = size_table[i];
var entry = new PackedEntry {
Name = string.Format ("{0}-{1:D6}", section_num, i),
Offset = base_offset,
Size = size,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
if (section_num < DefaultSections.Length && DefaultSections[section_num] != null)
entry.Type = DefaultSections[section_num];
if ("script" == entry.Type)
entry.IsPacked = true;
dir.Add (entry);
base_offset += size;
++i;
}
while (i < file_count && !section_table.ContainsKey (i));
++section_num;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (0 == entry.Size)
return Stream.Null;
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked || pent.Size <= 4)
return base.OpenEntry (arc, entry);
var input = arc.File.CreateStream (entry.Offset, entry.Size);
if (0 == pent.UnpackedSize)
pent.UnpackedSize = input.Signature;
try
{
var data = Seraphim.ScnOpener.LzDecompress (input);
return new BinMemoryStream (data, entry.Name);
}
catch
{
return arc.File.CreateStream (entry.Offset, entry.Size);
}
finally
{
input.Dispose();
}
}
}
}