Function flagset_to_string

sql/strfunc.cc:384–406

}

char *flagset_to_string(THD *thd, LEX_STRING *result, ulonglong set,
                        const char *lib[])
{
  char buff[STRING_BUFFER_USUAL_SIZE*8];
  String tmp(buff, sizeof(buff), &my_charset_latin1);
  LEX_STRING unused;

  if (!result) result= &unused;

  tmp.length(0);

  // note that the last element is always "default", and it's ignored below
  for (uint i= 0; lib[i+1]; i++, set >>= 1)
  {
    tmp.append(lib[i]);
    tmp.append(set & 1 ? "=on," : "=off,");
  }

  result->str=    thd->strmake(tmp.ptr(), tmp.length()-1);
  result->length= tmp.length()-1;

  return result->str;
}