NAME    [Toc]    [Back]

     isxdigit, ishexnumber -- hexadecimal-digit character test

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     isxdigit(int c);

     int
     ishexnumber(int c);

DESCRIPTION    [Toc]    [Back]

     The isxdigit() function tests for any hexadecimal-digit character.  For
     any 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''

     For single C chars locales (see multibyte(3)) the value of the argument
     is representable as an unsigned char or the value of EOF.

RETURN VALUES    [Toc]    [Back]

     The isxdigit() function returns zero if the character tests false and
     returns non-zero if the character tests true.

COMPATIBILITY    [Toc]    [Back]

     Although isxdigit() and ishexnumber() accept arguments outside of the
     range of the unsigned char type in locales with large character sets,
     this is a 4.4BSD extension and the isxwdigit() and iswhexnumber() functions
 should be used instead for maximum portability.

SEE ALSO    [Toc]    [Back]

     ctype(3), iswxdigit(3), multibyte(3), ascii(7)

STANDARDS    [Toc]    [Back]

     The isxdigit() function conforms to ISO/IEC 9899:1990 (``ISO C89'').


FreeBSD 5.2.1			October 6, 2002 		 FreeBSD 5.2.1