Function arg2num

zic.c:747–759

Convert ARG, a string in base BASE, to an unsigned long value no greater than MAXVAL. On failure, diagnose with MSGID and exit. */

/* Convert ARG, a string in base BASE, to an unsigned long value no
   greater than MAXVAL.  On failure, diagnose with MSGID and exit.  */
static unsigned long
arg2num(char const *arg, int base, unsigned long maxval, char const *msgid)
{
  unsigned long n;
  char *ep;
  errno = 0;
  n = strtoul(arg, &ep, base);
  if (ep == arg || *ep || maxval < n || errno) {
    fprintf(stderr, _(msgid), progname, arg);
    exit(EXIT_FAILURE);
  }
  return n;
}

#ifndef MODE_T_MAX