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.

see_pthreads(7))">)">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 3.64 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/.

2014-03-14

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