[FFmpeg-devel] [PATCH] avcodec/fft_template: Fix multiple runtime error: signed integer overflow: -1943918714 - 1935113003 cannot be represented in type 'int'
nfxjfg at googlemail.com
Fri Jun 9 19:09:22 EEST 2017
On Fri, 9 Jun 2017 11:34:26 +0300
Ivan Kalvachev <ikalvachev at gmail.com> wrote:
> If I understand correctly, the root of the problem is the undefined behavior
> of the compiler and the C standard.
> Is there any chance that FFmpeg project could initiate a change in the
> next C standard, so this thing would be defined?
> (and I guess, also define a few other similar things, like signed
> right shift, etc...)
> It is a matter of fact, that a lot of compiler-defined-things have
> been implemented in
> certain ways on most compilers and that there are plenty of programs
> depend on these
> specific implementations and break when a new compiler does things differently
> (clang had nice article about it).
> About the typedef, is SUINT a standard defined type for workarounding
> this specific problem?
> I do suspect that some of our fellow developers simply find its name ugly.
> Maybe they would be more welcoming if
> "suint32_t" like typedef is used?
This thing is brain dead - not even the post year 2000 C committee
would accept it.
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