Function my_decimal2string

sql/my_decimal.cc:92–120

*/

int my_decimal2string(uint mask, const my_decimal *d,
                      uint fixed_prec, uint fixed_dec,
                      char filler, String *str)
{
  /*
    Calculate the size of the string: For DECIMAL(a,b), fixed_prec==a
    holds true iff the type is also ZEROFILL, which in turn implies
    UNSIGNED. Hence the buffer for a ZEROFILLed value is the length
    the user requested, plus one for a possible decimal point, plus
    one if the user only wanted decimal places, but we force a leading
    zero on them, plus one for the '\0' terminator. Because the type
    is implicitly UNSIGNED, we do not need to reserve a character for
    the sign. For all other cases, fixed_prec will be 0, and
    my_decimal_string_length() will be called instead to calculate the
    required size of the buffer.
  */
  int length= (fixed_prec
               ? (fixed_prec + ((fixed_prec == fixed_dec) ? 1 : 0) + 1 + 1)
               : my_decimal_string_length(d));
  int result;
  if (str->alloc(length))
    return check_result(mask, E_DEC_OOM);
  result= decimal2string((decimal_t*) d, (char*) str->ptr(),
                         &length, (int)fixed_prec, fixed_dec,
                         filler);
  str->length(length);
  str->set_charset(&my_charset_numeric);
  return check_result(mask, result);
}


/**