String::StrCmp

int String::StrCmp(const String& s1, const String& s2)
// returns:   0 if s1 == s2
//            - if s1 < s2
//            + if s1 > s2
// using lexicographic ordering
{
  if      ((s1.Size() == 0) && (s2.Size() == 0))
    return 0;
  else if ((s1.Size() == 0) && (s2.Size() != 0))
    return -1;
  else if ((s1.Size() != 0) && (s2.Size() == 0))
    return 1;
  else
    return (strcmp(s1.str, s2.str));
} // end StrCmp()