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ISXDIGIT(3) |
Library Functions Manual |
ISXDIGIT(3) |
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.