memcmp(3) [freebsd man page]

MEMCMP(3)						   BSD Library Functions Manual 						 MEMCMP(3)

NAME

     memcmp -- compare byte string

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 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 '', for example).  Zero-length strings are always identical.

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'').

BSD
								   June 4, 1993 							       BSD

MEMCMP(3)						     Linux Programmer's Manual							 MEMCMP(3)

NAME

       memcmp - compare memory areas

SYNOPSIS

       #include <string.h>

       int memcmp(const void *s1, const void *s2, size_t n);

DESCRIPTION

       The memcmp() function compares the first n bytes (each interpreted as unsigned char) of the memory areas s1 and s2.

RETURN VALUE

       The memcmp() function returns an integer less than, equal to, or greater than zero if the first n bytes of s1 is found, respectively, to be
       less than, to match, or be greater than the first n bytes of s2.

       For a nonzero return value, the sign is determined by the sign of the difference between the first pair of bytes (interpreted  as  unsigned
       char) that differ in s1 and s2.

CONFORMING TO

       SVr4, 4.3BSD, C89, C99, POSIX.1-2001.

SEE ALSO

       bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strncasecmp(3), strncmp(3), wmemcmp(3)

COLOPHON

       This  page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

								    2012-11-25								 MEMCMP(3)