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”).