memcmp
—
compare byte string
Standard C Library (libc, -lc)
#include <string.h>
int
memcmp
(const
void *b1, const void
*b2, size_t
len);
The memcmp
() function compares byte string
b1 against byte string b2. Both
strings are assumed to be len bytes long.
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.
The memcmp
() function conforms to
ISO/IEC 9899:1990 (“ISO C90”).