Minix1.5/lib/ansi/memset.c

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#include <lib.h>
/* memset - set bytes
 *
 * CHARBITS should be defined only if the compiler lacks "unsigned char".
 * It should be a mask, e.g. 0377 for an 8-bit machine.
 */

#include <string.h>

#ifndef CHARBITS
#	define	UNSCHAR(c)	((unsigned char)(c))
#else
#	define	UNSCHAR(c)	((c)&CHARBITS)
#endif

void *memset(s, ucharfill, size)
_VOIDSTAR s;
register int ucharfill;
size_t size;
{
  register char *scan;
  register size_t n;
  register int uc;

  scan = (char *) s;
  uc = UNSCHAR(ucharfill);
  for (n = size; n > 0; n--) *scan++ = uc;

  return(s);
}