Function process_str_arg

strings/my_vsnprintf.c:197–280

*/

static char *process_str_arg(CHARSET_INFO *cs, char *to, const char *end,
                             longlong length_arg, size_t width, char *par,
                             my_bool escaped_arg, my_bool nice_cut)
{
  int well_formed_error;
  uint dots= 0;
  size_t plen, left_len= (size_t) (end - to) + 1, slen=0;
  my_bool left_fill= 1;
  size_t length;

  /*
    The sign of the length argument specify whether the string should be right
    or left adjusted
  */
  if (length_arg < 0)
  {
    length= (size_t) -length_arg;
    left_fill= 0;
  }
  else
    length= (size_t) length_arg;

  if (!par)
    par = (char*) "(null)";

  if (nice_cut)
  {
    plen= slen= strnlen(par, width + 1);
    if (plen > width)
      plen= width;
    if (left_len <= plen)
    {
      plen = left_len - 1;
      length= plen;
    }
    if ((slen > plen))
    {
      if (plen < 3)
      {
        dots= (uint) plen;
        plen= 0;
      }
      else
      {
        dots= 3;
        plen-= 3;
      }
    }
  }
  else
  {
    plen= slen= strnlen(par, width);
    dots= 0;
    if (left_len <= plen)
    {
      plen = left_len - 1;
      length= plen;
    }