[Mono-bugs] [Bug 417833] BitVector32. CreateSection allows the creation of illegal sections

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https://bugzilla.novell.com/show_bug.cgi?id=417833

User lunchtimemama at gmail.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=417833#c1





--- Comment #1 from Scott Peterson <lunchtimemama at gmail.com>  2008-08-16 07:20:45 MDT ---
It looks like behavior was intentional:

2003-09-04  Duncan Mak  <duncan at ximian.com>

        Patches from Alon Gazit <along at mainsoft.com>.

        * BitVector32.cs (CreateSection): Check that the new
        calculated offset isn't more than 32 and not that the sum of the
        new offset and the number of set bits is more than 32.
        (this): Perform bitwise and with the complement of the mask
        shifted version (~(section.Mask << section.Offset)) and not with
        the shifted version of the mask's complement (~section.Mask <<
        section.Offset).
        (this): Currently doesn't return the correct value when the data
        in the BitVector32 instance is negative.

Why would this be the case? Was this done to emulate the .NET behavior?


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