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(DatOpener): recognize archives with different filename lengths.

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This commit is contained in:
morkt 2016-05-23 22:50:11 +04:00
parent 98ee3af701
commit 0f9c679b8c
1 changed files with 38 additions and 21 deletions
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59
ArcFormats/MnoViolet/ArcMnoViolet.cs
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@ -45,33 +45,50 @@ namespace GameRes.Formats.MnoViolet
Extensions = new string[] { "dat" }; Extensions = new string[] { "dat" };
} }
static readonly uint[] NameSizes = { 100, 68, 44 };
static readonly Lazy<ImageFormat> s_GraFormat = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("GRA"));
public override ArcFile TryOpen (ArcView file) public override ArcFile TryOpen (ArcView file)
{ {
int count = file.View.ReadInt32 (0); int count = file.View.ReadInt32 (0);
if (count <= 0 || count > 0xfffff) if (!IsSaneCount (count))
return null; return null;
uint name_size = 100; List<Entry> dir = null;
uint index_size = (uint)((name_size+8) * count); foreach (var name_size in NameSizes)
uint first_offset = file.View.ReadUInt32 (4+name_size+4);
if (first_offset != (4 + index_size) || index_size > file.View.Reserve (4, index_size))
return null;
var dir = new List<Entry> (count);
long index_offset = 4;
for (int i = 0; i < count; ++i)
{ {
string name = file.View.ReadString (index_offset, name_size); uint index_size = (uint)((name_size+8) * count);
if (0 == name.Length) uint first_offset = file.View.ReadUInt32 (4+name_size+4);
return null; if (first_offset == (4 + index_size) && first_offset < file.MaxOffset)
index_offset += name_size; {
uint offset = file.View.ReadUInt32 (index_offset+4); if (null == dir)
var entry = AutoEntry.Create (file, offset, name); dir = new List<Entry> (count);
entry.Size = file.View.ReadUInt32 (index_offset); long index_offset = 4;
if (offset <= index_size || !entry.CheckPlacement (file.MaxOffset)) for (int i = 0; i < count; ++i)
return null; {
dir.Add (entry); string name = file.View.ReadString (index_offset, name_size);
index_offset += 8; if (string.IsNullOrWhiteSpace (name))
goto CheckNextLength;
index_offset += name_size;
uint offset = file.View.ReadUInt32 (index_offset+4);
var entry = new AutoEntry (name, () => {
uint signature = file.View.ReadUInt32 (offset);
if (1 == signature)
return s_GraFormat.Value;
return AutoEntry.DetectFileType (signature);
});
entry.Offset = offset;
entry.Size = file.View.ReadUInt32 (index_offset);
if (offset <= index_size || !entry.CheckPlacement (file.MaxOffset))
goto CheckNextLength;
dir.Add (entry);
index_offset += 8;
}
return new ArcFile (file, this, dir);
}
CheckNextLength:
;
} }
return new ArcFile (file, this, dir); return null;
} }
} }
} }