MEMCMP(3)

NAME
memcmp - compare byte string

SYNOPSIS
#include <string.h>
int
memcmp(const void *b1, const void *b2, size_t len);

DESCRIPTION
The memcmp() function compares byte string b1 against byte string b2. Both strings are assumed to be len 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.

SEE ALSO
bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strxfrm(3), timingsafe_memcmp(3), wmemcmp(3)

STANDARDS
The memcmp() function conforms to ansiC.

HISTORY
The memcmp() function first appeared in AT&T UNIX and was reimplemented for 4.3BSD.