Function append_query_string

sql/log_event_server.cc:517–555

*/

int append_query_string(CHARSET_INFO *csinfo, String *to,
                        const char *str, size_t len, bool no_backslash)
{
  char *beg, *ptr;
  my_bool overflow;
  uint32 const orig_len= to->length();
  if (to->reserve(orig_len + len * 2 + 4))
    return 1;

  beg= (char*) to->ptr() + to->length();
  ptr= beg;
  if (csinfo->escape_with_backslash_is_dangerous)
    ptr= str_to_hex(ptr, (uchar*)str, len);
  else
  {
    *ptr++= '\'';
    if (!no_backslash)
    {
      ptr+= escape_string_for_mysql(csinfo, ptr, 0, str, len, &overflow);
    }
    else
    {
      const char *frm_str= str;

      for (; frm_str < (str + len); frm_str++)
      {
        /* Using '' way to represent "'" */
        if (*frm_str == '\'')
          *ptr++= *frm_str;

        *ptr++= *frm_str;
      }
    }

    *ptr++= '\'';
  }
  to->length((uint32)(orig_len + ptr - beg));
  return 0;
}


/**************************************************************************