Hi Bruno, On Feb 16 17:18, Bruno Haible via Cygwin wrote: > Per POSIX [1], the functions strcasecmp and strncasecmp should > "use the current locale to determine the case of the characters.". > > [1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/strcasecmp.html > > This is not what Cygwin does: In the fr_FR.ISO8859-1 locale, the > characters 0xE9 and 0xC9 are the same modulo case, but strcasecmp > and strncasecmp consider these characters to be different.
Thanks for your report. This is a longstanding problem in newlib. All four strcasecmp functions call tolower on a char without casting them to unsigned. So tolower is called with negativ values if the char is not in the ASCII range. Adding a cast fixes that and I just pushed a matching patch. I'm just not sure if that's sufficient in the light of POSIX.1-2024. The above expression seems to indicate that strcasecmp and friends are now expected to work on multibyte codesets like UTF-8. I checked the glibc sources and they still do the bytewise tolower twist as well, though... Thanks, Corinna -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
