DragonFly On-Line Manual Pages

ISXDIGIT(3)           DragonFly Library Functions Manual           ISXDIGIT(3)

NAME
     isxdigit, isxdigit_l, ishexnumber, ishexnumber_l -- hexadecimal-digit
     character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isxdigit(int c);

     int
     isxdigit_l(int c, locale_t locale);

     #include <xlocale.h>

     int
     ishexnumber(int c);

     int
     ishexnumber_l(int c, locale_t locale);

DESCRIPTION
     The isxdigit() and isxdigit_l() functions test for any hexadecimal-digit
     character.  Regardless of locale, this includes the following characters
     only:

     ``0''         ``1''         ``2''         ``3''         ``4''
     ``5''         ``6''         ``7''         ``8''         ``9''
     ``A''         ``B''         ``C''         ``D''         ``E''
     ``F''         ``a''         ``b''         ``c''         ``d''
     ``e''         ``f''

     The ishexnumber() and ishexnumber_l() functions behave similarly to
     isxdigit() and isxdigit_l(), but may recognize additional characters,
     depending on the current locale setting.

     The value of the argument must be representable as an unsigned char or
     the value of EOF.

     The _l-suffixed versions take an explicit locale argument, whereas the
     non-suffixed versions use the current global or per-thread locale.

RETURN VALUES
     The isxdigit(), isxdigit_l(), ishexnumber(), and ishexnumber_l()
     functions return zero if the character tests false and returns non-zero
     if the character tests true.

COMPATIBILITY
     The 4.4BSD extension of accepting arguments outside of the range of the
     unsigned char type in locales with large character sets is considered
     obsolete and may not be supported in future releases.  The iswxdigit(),
     iswxdigit_l(), iswhexnumber(), and iswhexnumber_l() functions should be
     used instead.

SEE ALSO
     ctype(3), ctype_l(3), iswxdigit(3), iswxdigit_l(3), xlocale(3), ascii(7)

STANDARDS
     The isxdigit() function conforms to ISO/IEC 9899:1990 (``ISO C90'').  The
     isxdigit_l() function conforms to IEEE Std 1003.1-2008 (``POSIX.1'').

HISTORY
     The ishexnumber() function appeared in 4.4BSD.

DragonFly 4.3                  December 25, 2013                 DragonFly 4.3