MEMCMP(3P)                                          POSIX Programmer's Manual                                         MEMCMP(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

NAME
       memcmp - compare bytes in memory

SYNOPSIS
       #include <string.h>

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


DESCRIPTION
       The  memcmp() function shall compare the first n bytes (each interpreted as unsigned char) of the object pointed to by s1
       to the first n bytes of the object pointed to by s2.

       The sign of a non-zero return value shall be determined by the sign of the difference between the  values  of  the  first
       pair of bytes (both interpreted as type unsigned char) that differ in the objects being compared.

RETURN VALUE
       The  memcmp()  function shall return an integer greater than, equal to, or less than 0, if the object pointed to by s1 is
       greater than, equal to, or less than the object pointed to by s2, respectively.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003  Edition,  Standard  for
       Information  Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any
       discrepancy  between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group
       Standard  is  the  referee   document.   The   original   Standard   can   be   obtained   online   at   http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                    MEMCMP(3P)