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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.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The memcmp() function is thread-safe.

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 3.74 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at http://www.kernel.org/doc/man-pages/.



                                            2014-03-14                                  MEMCMP(3)


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