NAME
isxdigit —
hexadecimal-digit character
test
SYNOPSIS
#include
<ctype.h>
int
isxdigit(int
c);
DESCRIPTION
The
isxdigit()
function tests for any hexadecimal-digit character.
RETURN VALUES
The isxdigit() function returns zero if
the character tests false or non-zero if the character tests true.
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The isxdigit() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
CAVEATS
The argument to isxdigit() must be
EOF or representable as an unsigned
char; otherwise, the result is undefined.