memcmp man page on Archlinux

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

       memcmp - compare memory areas

       #include <string.h>

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

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

       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.

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

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

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

       This  page  is  part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at

				  2014-03-14			     MEMCMP(3)

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