scan_ulong.c

   1 #include "scan.h"
   2
   3 unsigned int scan_ulong(register const char *s,register unsigned long *u)
   4 {
   5   register unsigned int pos = 0;
   6   register unsigned long result = 0;
   7   register unsigned long c;
   8   while ((c = (unsigned long) (unsigned char) (s[pos] - '0')) < 10) {
   9     result = result * 10 + c;
  10     ++pos;
  11   }
  12   *u = result;
  13   return pos;
  14 }