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CTYPE_L(3) FreeBSD Library Functions Manual CTYPE_L(3) NAME digittoint_l, isalnum_l, isalpha_l, isblank_l, iscntrl_l, isdigit_l, isgraph_l, ishexnumber_l, isideogram_l, islower_l, isnumber_l, isphonogram_l, isprint_l, ispunct_l, isrune_l, isspace_l, isspecial_l, isupper_l, isxdigit_l, tolower_l, toupper_l - character classification functions LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <ctype.h> int digittoint_l(int c, locale_t loc); int isalnum_l(int c, locale_t loc); int isalpha_l(int c, locale_t loc); int iscntrl_l(int c, locale_t loc); int isdigit_l(int c, locale_t loc); int isgraph_l(int c, locale_t loc); int ishexnumber_l(int c, locale_t loc); int isideogram_l(int c, locale_t loc); int islower_l(int c, locale_t loc); int isnumber_l(int c, locale_t loc); int isphonogram_l(int c, locale_t loc); int isspecial_l(int c, locale_t loc); int isprint_l(int c, locale_t loc); int ispunct_l(int c, locale_t loc); int isrune_l(int c, locale_t loc); int isspace_l(int c, locale_t loc); int isupper_l(int c, locale_t loc); int isxdigit_l(int c, locale_t loc); int tolower_l(int c, locale_t loc); int toupper_l(int c, locale_t loc); DESCRIPTION The above functions perform character tests and conversions on the integer c in the locale loc. They behave in the same way as the versions without the _l suffix, but use the specified locale rather than the global or per-thread locale. <ctype.h>, or as true functions in the C library. See the specific manual pages for more information. SEE ALSO digittoint_l(3), isalnum_l(3), isalpha_l(3), isblank_l(3), iscntrl_l(3), isdigit_l(3), isgraph_l(3), isideogram_l(3), islower_l(3), isphonogram_l(3), isprint_l(3), ispunct_l(3), isrune_l(3), isspace_l(3), isspecial_l(3), isupper_l(3), isxdigit_l(3), tolower_l(3), toupper_l(3), wctype_l(3), xlocale_l(3) STANDARDS These functions conform to IEEE Std 1003.1-2008 ("POSIX.1"), except for digittoint_l(), ishexnumber_l(), isideogram_l(), isnumber_l(), isphonogram_l(), isrune_l() and isspecial_l() which are FreeBSD extensions. FreeBSD 14.1-RELEASE-p8 December 19, 2022 FreeBSD 14.1-RELEASE-p8