Re: Bug in MagickAnnoteImage() if locale is set to de_DE.UTF-8

Hi,

apologies for the late reply. I forgot about the topic...

On Sun, May 28, 2017 at 06:00:44PM -0500, Bob Friesenhahn wrote:
> There is a known problem in that parsing floating point numbers (e.g.
> numbers like "200.0") may fail if the locale uses different delimiter for
> the decimal point (e.g. "200,0").  The reason for this is that all text
> formats which include floating point numbers use traditional C/POSIX locale.
> Changing the numeric locale to something else causes the operating system's
> floating point parsing and generation to operate incorrectly.

I see this, but I did not input my numbers as text at all. They're
floating-point literals directly in the C source code (just see the
example I submitted) so unless GraphicsMagick is converting them to a
string by itself, this should have no effect.

> Try adding
>
>   (void) setlocale(LC_NUMERIC,"C");
>
> after any preceding locale requests.

I can confirm this works. If I change LC_NUMERIC as advised by you, the
problem does not occur. This however looks to me more like a workaround
than like a solution. If this is the only possible way to avoid the
problem, I think GraphicsMagick should do that call on itself before it
does a text conversion, and afterwards reset it to what it was
before. Ideally however it would not depend on the locale at all.

Greetings
Marvin

-- 
Blog: https://www.guelkerdev.de
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