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(DatOpener.TryOpen): do not lookup zero signatures.

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This commit is contained in:
morkt 2015-08-05 21:18:43 +04:00
parent 126e037ac9
commit d72ed765b3
1 changed files with 7 additions and 6 deletions
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13
ArcFormats/ArcAil.cs
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@ -43,13 +43,13 @@ namespace GameRes.Formats.Ail
public DatOpener ()
{
Extensions = new string[] { "dat" };
Extensions = new string[] { "dat", "snl" };
}
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0);
if (count <= 0 || count > 0xfffff)
if (!IsSaneCount (count))
return null;
long offset = 4+count*4;
if (offset >= file.MaxOffset)
@ -92,21 +92,22 @@ namespace GameRes.Formats.Ail
}
entry.Offset += extra;
entry.Size -= extra;
uint signature;
if (entry.IsPacked)
{
file.View.Read (entry.Offset, preview, 0, (uint)preview.Length);
using (var input = new MemoryStream (preview))
{
LzssUnpack (input, sign_buf);
uint signature = LittleEndian.ToUInt32 (sign_buf, 0);
SetEntryType (entry, signature);
signature = LittleEndian.ToUInt32 (sign_buf, 0);
}
}
else
{
uint signature = file.View.ReadUInt32 (entry.Offset);
SetEntryType (entry, signature);
signature = file.View.ReadUInt32 (entry.Offset);
}
if (0 != signature)
SetEntryType (entry, signature);
}
return new ArcFile (file, this, dir);
}