osx man page for memset_pattern

MEMSET_PATTERN(3)					   BSD Library Functions Manual 					 MEMSET_PATTERN(3)

NAME
     memset_pattern4, memset_pattern8, memset_pattern16 -- memset of a multi-byte pattern

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <string.h>

     void
     memset_pattern4(void *b, const void *pattern4, size_t len);

     void
     memset_pattern8(void *b, const void *pattern8, size_t len);

     void
     memset_pattern16(void *b, const void *pattern16, size_t len);

DESCRIPTION
     These are analogous to memset(), except that they fill memory with a replicated pattern either 4, 8, or 16 bytes long.  b points to a buffer
     of size len bytes which is to be filled.  The second parameter points to the pattern.  If the buffer length is not an even multiple of the
     pattern length, the last instance of the pattern will be truncated.  Neither the buffer nor the pattern pointer need be aligned.

EXAMPLES
     The following example:

	   char buf[10];

	   memset_pattern4( buf, "1234", sizeof(buf) );

     will set the buffer to the value "1234123412".

SEE ALSO
     memset(3)

HISTORY
     These functions first appeared in Mac OS 10.5.

Darwin								 October 14, 2005							    Darwin