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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 *s1, const void *s2, size_t n);


DESCRIPTION

     The memcmp() function compares byte string s1 against byte string s2.
     Both strings are assumed to be n bytes long.


RETURN VALUES

     The memcmp() function returns zero if the two strings are identical, oth-
     erwise returns the difference between the first two differing bytes
     (treated as unsigned char values, so that `\200' is greater than `\0',
     for example).  Zero-length strings are always identical.  This behavior
     is not required by C and portable code should only depend on the sign of
     the returned value.


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

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