Paul Eggert wrote:
> > +  while (isspace ((unsigned char) *str))
> > +    str++;
> > +  if (isdigit ((unsigned char) *str))
> > +    {
> > +      unsigned long ret = strtoul (str, (char **)ppz, base);
> 
> Perhaps "*str != '+' && *str != '-'" instead of "isdigit ((unsigned 
> char) *str)? It'd be a bit faster.

"*str != '+' && *str != '-'" would work as well, yes.

Regarding speed, I'm not sure: the byte describing the properties
of *str is in the L1 cache after the execution of
  isspace ((unsigned char) *str)

Bruno




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