Function my_vsnprintf_ex

strings/my_vsnprintf.c:539–658

*/

size_t my_vsnprintf_ex(const CHARSET_INFO *cs, char *to, size_t n,
                       const char* fmt, va_list ap)
{
  char *start=to, *end=to+n-1;
  size_t length, width;
  uint print_type, have_longlong;

  for (; *fmt ; fmt++)
  {
    if (*fmt != '%')
    {
      if (to == end)                            /* End of buffer */
	break;
      *to++= *fmt;                            /* Copy ordinary char */
      continue;
    }
    fmt++;					/* skip '%' */

    length= width= 0;
    print_type= 0;

    /* Read max fill size (only used with %d and %u) */
    if (my_isdigit(&my_charset_latin1, *fmt))
    {
      fmt= get_length(fmt, &length, &print_type);
      if (*fmt == '$')
      {
        to= process_args(cs, to, end, (fmt+1), length, ap);
        return (size_t) (to - start);
      }
    }
    else
    {
      if (*fmt == '`')
      {
        print_type|= ESCAPED_ARG;
        fmt++;
      }
      if (*fmt == '-')
        fmt++;
      if (*fmt == '*')
      {
        fmt++;
        length= va_arg(ap, int);
      }
      else
        fmt= get_length(fmt, &length, &print_type);
    }

    if (*fmt == '.')
    {
      fmt++;
      if (*fmt == '*')
      {
        fmt++;
        width= va_arg(ap, int);
      }
      else