Mac Developer Library Developer


This manual page is part of Xcode Tools version 5.0

To obtain these tools:

If you are running a version of Xcode Tools other than 5.0, view the documentation locally:

  • In Xcode

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

MEMCMP(3)                BSD Library Functions Manual                MEMCMP(3)

     memcmp -- compare byte string

     Standard C Library (libc, -lc)

     #include <string.h>

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

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

     The memcmp() function returns zero if the two strings are identical, otherwise 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.

     bcmp(3), strcasecmp(3), strcmp(3), strcoll(3), strxfrm(3), wmemcmp(3)

     The memcmp() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

BSD                              June 4, 1993                              BSD

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.