Oliver Fromme wrote:
Artem Kuchin wrote:
I have a very stupid problem. I cannot convert to upper
or lower case using manually set locale (setlocale(..)).
A very simple program:
[...]
printf("IS UPPER ?: %d\n",isupper('?'));
printf("IS UPPER ?: %d\n",isupper('?'));
printf("IS LOWER ?: %d\n",islower('?'));
That's a common pitfall. Chars are signed by default on
FreeBSD, and the isupper() etc. function take an int type
argument. That means that characters >= 128 end up as
negative numbers, so they fail all isupper() and islower()
checks, and toupper()/tolower() don't touch them at all.
The solution is to typecast the constants to unsigned char
explicitly, like this: isupper((unsigned char) '?') etc.
Your program will work fine then.
My stupid. I should've noticed that. Thank you very much!
Issue closed.
--
Regards,
Artem
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