NAME
memcmp —
compare byte string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<string.h>
int
memcmp(const void *s1,
const void *s2, size_t n);
DESCRIPTION
The
memcmp()
function compares byte string s1 against byte string
s2. Both strings are assumed to be
n bytes long.
RETURN VALUES
The memcmp() function returns zero if the
two strings are identical, otherwise returns the difference between the
first two differing bytes (treated as unsigned char
values, so that ‘\200’ is greater than
‘\0’, for example). Zero-length
strings are always identical. This behavior is not required by C and
portable code should only depend on the sign of the returned value.
SEE ALSO
bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strxfrm(3), wmemcmp(3)
STANDARDS
The memcmp() function conforms to
ISO/IEC 9899:1990
(“ISO C90”).