1 #include "fmt.h"

     2 

     3 unsigned int fmt_ulong(s,u) register char *s; register unsigned long u;

     4 {

     5   register unsigned int len; register unsigned long q;

     6   len = 1; q = u;

     7   while (q > 9) { ++len; q /= 10; }

     8   if (s) {

     9     s += len;

    10     do { *--s = '0' + (u % 10); u /= 10; } while(u); /* handles u == 0 */

    11   }

    12   return len;

    13 }