Well, that's what I get in linux and cygwin for:
#include <stdio.h>
#include <stdlib.h>
#include <math.h> /* the last two printfs requires this */
int main (void) {
printf ("strtof (\"nan\", NULL) = %f\n", strtof ("nan", NULL));
printf ("strtof (\"-nan\", NULL) = %f\n", strtof ("-nan", NULL));
printf ("strtod (\"nan\", NULL) = %f\n", strtod ("nan", NULL));
printf ("strtod (\"-nan\", NULL) = %f\n", strtod ("-nan", NULL));
printf ("strtold (\"nan\", NULL) = %Lf\n", strtold ("nan", NULL));
printf ("strtold (\"-nan\", NULL) = %Lf\n", strtold ("-nan", NULL));
printf ("nan (\"\") = %f\n", nan (""));
printf ("-nan (\"\") = %f\n", -nan (""));
}
I get:
Gentoo Linux (native linux)
strtof ("nan", NULL) = nan
strtof ("-nan", NULL) = nan
strtod ("nan", NULL) = nan
strtod ("-nan", NULL) = nan
strtold ("nan", NULL) = nan
strtold ("-nan", NULL) = nan
nan ("") = nan
-nan ("") = -nan
cygwin 2.10.0:
strtof ("nan", NULL) = nan
strtof ("-nan", NULL) = nan
strtod ("nan", NULL) = -nan
strtod ("-nan", NULL) = nan
strtold ("nan", NULL) = -nan
strtold ("-nan", NULL) = -nan
nan ("") = nan
-nan ("") = -nan
So, let's hope the patch does not transform the behavior from the nan
from math.h.
And yes, you have a good point. Just, well, different people made those
different parts of the code so, better cygwin follow the ""convention"",
if we can call it, that. :)
On 8/14/2018 12:35 PM, Corinna Vinschen wrote:
printf ("nan (\"\") = %f\n", nan (""));
printf ("-nan (\"\") = %f\n", -nan (""));
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