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(DAT/hibiki): try to read archive index from adjacent archive.

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This commit is contained in:
morkt 2017-12-02 05:21:44 +04:00
parent 32b256b013
commit 18f52a78f8
1 changed files with 42 additions and 9 deletions
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51
ArcFormats/YaneSDK/ArcHibiki.cs
View File

@ -49,12 +49,22 @@ namespace GameRes.Formats.YaneSDK
{
if (!file.Name.HasExtension (".dat"))
return null;
int count = (short)(file.View.ReadUInt16 (0) ^ 0x8080);
int count = ReadCount (file);
if (!IsSaneCount (count))
return null;
var scheme = QueryScheme (file.Name);
if (null == scheme)
return null;
return TryOpenWithScheme (file, count, scheme);
}
int ReadCount (ArcView file)
{
return (short)(file.View.ReadUInt16 (0) ^ 0x8080);
}
ArcFile TryOpenWithScheme (ArcView file, int count, HibikiDatScheme scheme)
{
var dat_name = Path.GetFileName (file.Name).ToLowerInvariant();
IList<HibikiTocRecord> toc_table = null;
if (scheme.ArcMap != null && scheme.ArcMap.TryGetValue (dat_name, out toc_table))
@ -62,17 +72,12 @@ namespace GameRes.Formats.YaneSDK
if (toc_table.Count != count)
toc_table = null;
}
var lst_name = Path.ChangeExtension (file.Name, ".lst");
Stream input;
if (VFS.FileExists (lst_name))
input = VFS.OpenStream (lst_name);
else
input = file.CreateStream();
using (var input = OpenLstIndex (file, dat_name, scheme))
using (var dec = new XoredStream (input, 0x80))
using (var index = new BinaryReader (dec))
{
const int name_length = 0x100;
int data_offset = 2 + (name_length + 10) * count;
index.BaseStream.Position = 2;
Func<int, Entry> read_entry;
if (null == toc_table)
@ -105,7 +110,8 @@ namespace GameRes.Formats.YaneSDK
for (int i = 0; i < count; ++i)
{
var entry = read_entry (i);
if (!entry.CheckPlacement (file.MaxOffset))
if (null == entry || string.IsNullOrWhiteSpace (entry.Name)
|| entry.Offset < data_offset || entry.Size > file.MaxOffset)
return null;
dir.Add (entry);
}
@ -113,6 +119,33 @@ namespace GameRes.Formats.YaneSDK
}
}
Stream OpenLstIndex (ArcView file, string dat_name, HibikiDatScheme scheme)
{
var lst_name = Path.ChangeExtension (file.Name, ".lst");
if (VFS.FileExists (lst_name))
return VFS.OpenStream (lst_name);
else if ("init.dat" == dat_name)
return file.CreateStream();
// try to open 'init.dat' archive in the same directory
var init_dat = VFS.CombinePath (VFS.GetDirectoryName (file.Name), "init.dat");
if (!VFS.FileExists (init_dat))
return file.CreateStream();
try
{
using (var init = VFS.OpenView (init_dat))
using (var init_arc = TryOpenWithScheme (init, ReadCount (init), scheme))
{
lst_name = Path.GetFileName (lst_name);
var lst_entry = init_arc.Dir.First (e => e.Name == lst_name);
return init_arc.OpenEntry (lst_entry);
}
}
catch
{
return file.CreateStream();
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var harc = arc as HibikiArchive;