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(TAC): recognize hashed filenames.

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morkt 2017-03-22 03:06:19 +04:00
parent f4363f3200
commit 0d98917d5e
1 changed files with 92 additions and 8 deletions
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100
ArcFormats/TanukiSoft/ArcTAC.cs
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@ -39,11 +39,18 @@ namespace GameRes.Formats.Tanuki
public override string Tag { get { return "TAC"; } }
public override string Description { get { return "TanukiSoft resource archive"; } }
public override uint Signature { get { return 0x63724154; } } // 'TArc'
public override bool IsHierarchic { get { return false; } }
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
public TacOpener ()
{
Extensions = new string[] { "tac", "stx" };
}
static readonly byte[] IndexKey = Encoding.ASCII.GetBytes ("TLibArchiveData");
static readonly string ListFileName = "tanuki.lst";
public override ArcFile TryOpen (ArcView file)
{
int version;
@ -59,6 +66,7 @@ namespace GameRes.Formats.Tanuki
int bucket_count = file.View.ReadInt32 (0x18);
uint index_size = file.View.ReadUInt32 (0x1C);
uint arc_seed = file.View.ReadUInt32 (0x20);
long index_offset = version >= 110 ? 0x2C : 0x24;
long base_offset = index_offset + index_size;
var blowfish = new Blowfish (IndexKey);
@ -69,6 +77,7 @@ namespace GameRes.Formats.Tanuki
using (var unpacked = new ZLibStream (input, CompressionMode.Decompress))
using (var index = new BinaryReader (unpacked))
{
var file_map = BuildFileNameMap (arc_seed);
var dir_table = new List<TacBucket> (bucket_count);
for (int i = 0; i < bucket_count; ++i)
{
@ -98,16 +107,28 @@ namespace GameRes.Formats.Tanuki
{
var entry = dir[bucket.Index+i] as TacEntry;
entry.Hash = entry.Hash << 16 | bucket.Hash;
entry.Name = string.Format ("{0:X16}", entry.Hash);
bool known_name = file_map.ContainsKey (entry.Hash);
if (known_name)
{
entry.Name = file_map[entry.Hash];
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
}
else
{
entry.Name = string.Format ("{0:X16}", entry.Hash);
}
if (entry.IsPacked)
continue;
entry.Key = Encoding.ASCII.GetBytes (string.Format ("{0}_tlib_secure_", entry.Hash));
var bf = new Blowfish (entry.Key);
file.View.Read (entry.Offset, buffer, 0, 8);
bf.Decipher (buffer, 8);
var res = AutoEntry.DetectFileType (buffer.ToUInt32 (0));
if (res != null)
entry.ChangeType (res);
if (!known_name)
{
var bf = new Blowfish (entry.Key);
file.View.Read (entry.Offset, buffer, 0, 8);
bf.Decipher (buffer, 8);
var res = AutoEntry.DetectFileType (buffer.ToUInt32 (0));
if (res != null)
entry.ChangeType (res);
}
if ("image" == entry.Type)
entry.EncryptedSize = Math.Min (10240, entry.Size);
else
@ -148,6 +169,69 @@ namespace GameRes.Formats.Tanuki
return new BinMemoryStream (data);
}
}
internal static ulong HashFromString (string s, uint seed)
{
s = s.Replace ('\\', '/').ToUpperInvariant();
var bytes = Encodings.cp932.GetBytes (s);
ulong hash = 0;
for (int i = 0; i < bytes.Length; ++i)
{
hash = bytes[i] + 0x19919 * hash + seed;
}
return hash;
}
internal static ulong HashFromAsciiString (string s, uint seed)
{
ulong hash = 0;
for (int i = 0; i < s.Length; ++i)
{
hash = (uint)char.ToUpperInvariant (s[i]) + 0x19919 * hash + seed;
}
return hash;
}
Dictionary<ulong, string> BuildFileNameMap (uint seed)
{
var map = new Dictionary<ulong, string> (KnownNames.Length);
foreach (var name in KnownNames)
{
map[HashFromAsciiString (name, seed)] = name;
}
return map;
}
internal string[] KnownNames { get { return s_known_file_names.Value; } }
static Lazy<string[]> s_known_file_names = new Lazy<string[]> (ReadTanukiLst);
static string[] ReadTanukiLst ()
{
try
{
var dir = FormatCatalog.Instance.DataDirectory;
var lst_file = Path.Combine (dir, ListFileName);
if (!File.Exists (lst_file))
return new string[0];
using (var input = new StreamReader (lst_file))
{
var names = new List<string>();
string line;
while ((line = input.ReadLine()) != null)
{
if (line.Length > 0)
names.Add (line);
}
return names.ToArray();
}
}
catch (Exception X)
{
System.Diagnostics.Trace.WriteLine (X.Message, "[TAC]");
return new string[0];
}
}
}
internal class TacEntry : PackedEntry