1/* Public domain. */
 2
 3#include "fmt.h"
 4
 5unsigned int fmt_ulong(register char *s,register unsigned long u)
 6{
 7  register unsigned int len; register unsigned long q;
 8  len = 1; q = u;
 9  while (q > 9) { ++len; q /= 10; }
10  if (s) {
11    s += len;
12    do { *--s = '0' + (u % 10); u /= 10; } while(u); /* handles u == 0 */
13  }
14  return len;
15}