memset.c revision 89857 
1/* memset
2   This implementation is in the public domain.  */
3
4/*
5
6@deftypefn Supplemental void* memset (void *@var{s}, int @var{c}, size_t @var{count})
7
8Sets the first @var{count} bytes of @var{s} to the constant byte
9@var{c}, returning a pointer to @var{s}.
10
11@end deftypefn
12
13*/
14
15#include <ansidecl.h>
16#ifdef __STDC__
17#include <stddef.h>
18#else
19#define size_t unsigned long
20#endif
21
22PTR
23DEFUN(memset, (dest, val, len),
24      PTR dest AND register int val AND register size_t len)
25{
26  register unsigned char *ptr = (unsigned char*)dest;
27  while (len-- > 0)
28    *ptr++ = val;
29  return dest;
30}
31