iswxdigit(3p) [posix man page]

ISWXDIGIT(3P)						     POSIX Programmer's Manual						     ISWXDIGIT(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       iswxdigit, iswxdigit_l -- test for a hexadecimal digit wide-character code

SYNOPSIS

       #include <wctype.h>

       int iswxdigit(wint_t wc);
       int iswxdigit_l(wint_t wc, locale_t locale);

DESCRIPTION

       For iswxdigit(): The functionality described on this reference page is aligned with the ISO C standard. Any conflict between  the  require-
       ments described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.

       The  iswxdigit() and iswxdigit_l() functions shall test whether wc is a wide-character code representing a character of class xdigit in the
       current locale, or in the locale represented by locale, respectively; see the Base Definitions volume of POSIX.1-2008, Chapter 7, Locale.

       The wc argument is a wint_t, the value of which the application shall ensure is a wide-character code corresponding to a valid character in
       the current locale, or equal to the value of the macro WEOF. If the argument has any other value, the behavior is undefined.

       The  behavior  is  undefined if the locale argument to iswxdigit_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale
       object handle.

RETURN VALUE

       The iswxdigit() and iswxdigit_l() functions shall return non-zero if wc is a hexadecimal digit wide-character code; otherwise,  they  shall
       return 0.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       To  ensure  applications  portability,  especially  across natural languages, only these functions and the functions in the reference pages
       listed in the SEE ALSO section should be used for character classification.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(),  setlo-
       cale(), uselocale()

       The Base Definitions volume of POSIX.1-2008, Chapter 7, Locale, <locale.h>, <wctype.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							     ISWXDIGIT(3P)