NAME

isxdigit — hexadecimal-digit character test

LIBRARY

Standard C Library (libc, -lc)

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 and returns non-zero if the character tests true.

SEE ALSO

ctype(3), 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 behavior is undefined. See the CAVEATS section of ctype(3) for more details.