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 8 Sets 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 22 PTR 23 DEFUN(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