NAME
strlen,
strnlen —
find length of string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
size_t
strlen(
const char
*s);
size_t
strnlen(
const
char *s,
size_t
maxlen);
DESCRIPTION
The
strlen() function computes the length of the string
s.
The
strnlen() function attempts to compute the length of
s, but never scans beyond the first
maxlen bytes of
s.
RETURN VALUES
The
strlen() function returns the number of characters that
precede the terminating
NUL
character.
The
strnlen() function returns either the same result as
strlen() or
maxlen, whichever is
smaller.
SEE ALSO
string(3),
wcslen(3),
wcswidth(3)
STANDARDS
The
strlen() function conforms to
ISO/IEC
9899:1990 (“ISO C90”). The
strnlen()
function conforms to
IEEE Std 1003.1-2008
(“POSIX.1”).