Method well_formed_copy

sql/sql_string.cc:1119–1137

Copy a string, with optional character set conversion, with optional left padding (for binary -> UCS2 conversion) Bad input bytes are replaced to '?'. The string that is written to "to" is always well-formed. @param to The destination string @param to_length Space available in "to" @param to_cs Character set of the "to" string @param from

  @returns                   number of bytes that were written to 'to'
*/
uint
String_copier::well_formed_copy(CHARSET_INFO *to_cs,
                                char *to, size_t to_length,
                                CHARSET_INFO *from_cs,
                                const char *from, size_t from_length,
                                size_t nchars)
{
  if ((to_cs == &my_charset_bin) || 
      (from_cs == &my_charset_bin) ||
      (to_cs == from_cs) ||
      my_charset_same(from_cs, to_cs))
  {
    m_cannot_convert_error_pos= NULL;
    return (uint) to_cs->copy_fix(to, to_length, from, from_length,
                                  nchars, this);
  }
  return (uint) my_convert_fix(to_cs, to, to_length, from_cs, from, from_length,
                        nchars, this, this);
}


/*