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MEMCMP(3)		    Library Functions Manual		     MEMCMP(3)

NAME
       memcmp -- compare bytes in memory

LIBRARY
       Standard	C Library (libc, -lc)

SYNOPSIS
       #include	<string.h>

       int
       memcmp(const void *b1, const void *b2, size_t len);

DESCRIPTION
       The  memcmp()  function compares	byte object b1 against byte object b2.
       Both objects are	assumed	to be len bytes	long.

RETURN VALUES
       The memcmp() function returns zero if the two  objects  are  identical.
       Zero-length  objects  are  considered identical.	 The memcmp() function
       returns a negative value	if the first differing byte has	a lower	 value
       in  b1  and  a  positive	value if the first differing byte has a	higher
       value in	b1.

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

STANDARDS
       The memcmp() function conforms to ISO/IEC 9899:1990 ("ISO C90").

CAVEATS
       If  the	objects	 differ, the C library memcmp()	implementation returns
       the difference between  the  first  two	differing  bytes  (treated  as
       unsigned	 char  values).	  This	behavior  is  not specified by ISO/IEC
       9899:1990 ("ISO C90"), is not portable, and may not occur in  light  of
       compiler	optimizations.

FreeBSD	15.0		       November	20, 2024		     MEMCMP(3)

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