isxdigit, ishexnumber
- hexadecimal-digit character test
LIBRARY
Lb libc
SYNOPSIS
#include <ctype.h> int
isxdigit (int c); int
ishexnumber (int c);
DESCRIPTION
The
isxdigit ();
function tests 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 ();
function behaves similarly to
isxdigit (,);
but may recognize additional characters,
depending on the current locale setting.
The value of the argument must be representable as an
Vt unsigned char
or the value of
EOF
RETURN VALUES
The
isxdigit ();
function returns zero if the character tests false and
returns non-zero if the character tests true.
COMPATIBILITY
The
BSD 4.4
extension of accepting arguments outside of the range of the
Vt unsigned char
type in locales with large character sets is considered obsolete
and may not be supported in future releases.
The
iswxdigit ();
function should be used instead.
