atol()

  Local<Value> BuildCell (PGresult *result, int row, int col)
  {
    HandleScope scope;

    if (PQgetisnull(result, row, col)) return scope.Close(Null());

    char *string = PQgetvalue(result, row, col);
    int32_t n = 0, i = 0;

    Oid t = PQftype(result, col);

    Handle<Value> cell;

    switch (t) {
      case BOOLOID:
        cell = *string == 't' ? True() : False();
        break;

      case INT8OID:
      case INT4OID:
      case INT2OID:
        for (i = string[0] == '-' ? 1 : 0; string[i]; i++) {
          n *= 10;
          n += string[i] - '0';
        }
        if (string[0] == '-') n = -n;
        cell = Integer::New(n);
        break;

      default:
#ifndef NDEBUG
//        printf("Unhandled OID: %d\n", t);
#endif
        cell = String::New(string);
    }
    return scope.Close(cell); 
  }