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fixed reading of AST index with zero-length entries.

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This commit is contained in:
morkt 2016-01-10 02:29:20 +04:00
parent 0833259e3b
commit a1ac261ce7
1 changed files with 25 additions and 17 deletions
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20
ArcFormats/ArcAST.cs
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@ -2,7 +2,7 @@
//! \date Tue Apr 21 02:24:20 2015
//! \brief AST script engine resource archives.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2016 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
@ -73,14 +73,21 @@ namespace GameRes.Formats.AST
if (name_length > name_buf.Length)
name_buf = new byte[name_length];
file.View.Read (index_offset+9, name_buf, 0, (uint)name_length);
if (2 == version)
for (int j = 0; j < name_length; ++j)
name_buf[j] ^= 0xff;
if (i+1 == count)
next_offset = (uint)file.MaxOffset;
else
next_offset = file.View.ReadUInt32 (index_offset+9+name_length);
if (next_offset < offset)
if (0 != offset && offset != file.MaxOffset)
{
if (2 == version)
for (int j = 0; j < name_length; ++j)
name_buf[j] ^= 0xff;
uint packed_size;
if (0 == next_offset)
packed_size = size;
else if (next_offset >= offset)
packed_size = next_offset - offset;
else
return null;
string name = Encodings.cp932.GetString (name_buf, 0, name_length);
var entry = new PackedEntry
@ -88,12 +95,13 @@ namespace GameRes.Formats.AST
Name = name,
Type = FormatCatalog.Instance.GetTypeFromName (name),
Offset = offset,
Size = next_offset - offset,
Size = packed_size,
UnpackedSize = size,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
index_offset += 9 + name_length;
}
if (2 == version)