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implemented IAR and WAR archives.

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morkt
2015-10-24 15:54:07 +04:00
parent 86d9121b94
commit f901f8252f
6 changed files with 819 additions and 0 deletions
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173
ArcFormats/Sas5/ArcSec5.cs Normal file
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//! \file ArcSec5.cs
//! \date Fri Oct 23 18:10:06 2015
//! \brief Sas5 engine resource index file.
//
// 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;
using System.Text;
namespace GameRes.Formats.Sas5
{
[Export(typeof(ArchiveFormat))]
public class Sec5Opener : ArchiveFormat
{
public override string Tag { get { return "SEC5"; } }
public override string Description { get { return "SAS5 engine resource index file"; } }
public override uint Signature { get { return 0x35434553; } } // 'SEC5'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
uint offset = 8;
var dir = new List<Entry>();
while (offset < file.MaxOffset)
{
string name = file.View.ReadString (offset, 4, Encoding.ASCII);
if ("ENDS" == name)
break;
uint section_size = file.View.ReadUInt32 (offset+4);
offset += 8;
var entry = new Entry {
Name = name,
Offset = offset,
Size = section_size,
};
dir.Add (entry);
offset += section_size;
}
if (dir.Count > 0)
return new ArcFile (file, this, dir);
return null;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if ("CODE" != entry.Name)
return arc.File.CreateStream (entry.Offset, entry.Size);
var code = new byte[entry.Size];
arc.File.View.Read (entry.Offset, code, 0, entry.Size);
DecryptCodeSection (code);
return new MemoryStream (code);
}
static void DecryptCodeSection (byte[] code)
{
byte key = 0;
for (int i = 0; i < code.Length; ++i)
{
int x = code[i] + 18;
code[i] ^= key;
key += (byte)x;
}
}
static internal Dictionary<string, Dictionary<int, Entry>> CurrentIndex;
static internal Dictionary<int, Entry> LookupIndex (string filename)
{
if (null == CurrentIndex)
CurrentIndex = FindSec5Resr (filename);
if (null == CurrentIndex)
return null;
Dictionary<int, Entry> arc_map = null;
CurrentIndex.TryGetValue (Path.GetFileName (filename), out arc_map);
return arc_map;
}
static internal Dictionary<string, Dictionary<int, Entry>> FindSec5Resr (string arc_name)
{
string dir_name = Path.GetDirectoryName (arc_name);
var match = Directory.GetFiles (dir_name, "*.sec5");
if (0 == match.Length)
{
string parent = Path.GetDirectoryName (dir_name);
if (!string.IsNullOrEmpty (parent))
match = Directory.GetFiles (parent, "*.sec5");
}
if (0 == match.Length)
return null;
using (var sec5 = new ArcView (match[0]))
{
if (!sec5.View.AsciiEqual (0, "SEC5"))
return null;
uint offset = 8;
while (offset < sec5.MaxOffset)
{
string id = sec5.View.ReadString (offset, 4, Encoding.ASCII);
if ("ENDS" == id)
break;
uint section_size = sec5.View.ReadUInt32 (offset+4);
offset += 8;
if ("RESR" == id)
{
using (var resr = sec5.CreateStream (offset, section_size))
return ReadResrSection (resr);
}
offset += section_size;
}
}
return null;
}
static internal Dictionary<string, Dictionary<int, Entry>> ReadResrSection (Stream input)
{
using (var resr = new BinaryReader (input, Encodings.cp932, true))
{
int count = resr.ReadInt32();
if (0 == count)
return null;
var map = new Dictionary<string, Dictionary<int, Entry>> (StringComparer.InvariantCultureIgnoreCase);
for (int i = 0; i < count; ++i)
{
string name = resr.BaseStream.ReadCString();
string type = resr.BaseStream.ReadCString();
string arc_type = resr.BaseStream.ReadCString();
int res_length = resr.ReadInt32();
var next_pos = resr.BaseStream.Position + res_length;
if (arc_type == "file-war" || arc_type == "file-iar")
{
string arc_name = resr.BaseStream.ReadCString();
int id = resr.ReadInt32();
var base_arc_name = Path.GetFileName (arc_name);
if (!map.ContainsKey (base_arc_name))
map[base_arc_name] = new Dictionary<int, Entry>();
var entry = new Entry
{
Name = name,
Type = type,
};
map[base_arc_name][id] = entry;
}
resr.BaseStream.Position = next_pos;
}
return map.Count > 0 ? map : null;
}
}
}
}