On Wed, 2012-02-29 at 11:50 +0000, Caolán McNamara wrote:
On Wed, 2012-02-29 at 12:13 +0100, Lionel Elie Mamane wrote:
Background: we have in sc/source/filter/inc/ftools.hxx supposedly
"safe" casts that are (according to the Doxygen documentation)
supposed to be safer than just static_cast. As fdo#39589 uncovered,
they are actually so buggy as to be *less* safe.
Back in November, I wrote a prototype _actually_ safe versions, but
got sidetracked and forgot about them. I'm unearthing them again now,
attached.
It might be a little orthogonal to just the cast issue, but I wonder if
Cert's IntegerLib or SafeInt (http://safeint.codeplex.com/) or somesuch
(https://bugzilla.mozilla.org/show_bug.cgi?id=555798) covers the same
ground and is license-suitable as a drop in ?
Yup. I've come across SafeInt as well while I was searching.
Boost also has numeric_cast as well.
http://www.boost.org/doc/libs/1_32_0/libs/numeric/conversion/doc/numeric_cast.html
Kohei
--
Kohei Yoshida, LibreOffice hacker, Calc
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