Function Check_This_Field

payloads/libpayload/curses/form/fty_num.c:180–280

--------------------------------------------------------------------------- | Facility : libnform | Function : static bool Check_This_Field(FIELD * field, | const void * argp) | | Description : Validate buffer content to be a valid numeric value | | Return Values : TRUE - field is valid | FALSE - field is i

|                    FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool
Check_This_Field(FIELD *field, const void *argp)
{
  const thisARG *argn = (const thisARG *)argp;
  double low = argn->low;
  double high = argn->high;
  int prec = argn->precision;
  unsigned char *bp = (unsigned char *)field_buffer(field, 0);
  char *s = (char *)bp;
  double val = 0.0;
  struct lconv *L = argn->L;
  char buf[64];
  bool result = FALSE;

  while (*bp && *bp == ' ')
    bp++;
  if (*bp)
    {
      if (*bp == '-' || *bp == '+')
	bp++;
#if USE_WIDEC_SUPPORT
      if (*bp)
	{
	  bool blank = FALSE;
	  int state = 0;
	  int len;
	  int n;
	  wchar_t *list = _nc_Widen_String((char *)bp, &len);

	  if (list != 0)
	    {
	      result = TRUE;
	      for (n = 0; n < len; ++n)
		{
		  if (blank)
		    {
		      if (list[n] != ' ')
			{
			  result = FALSE;
			  break;
			}
		    }
		  else if (list[n] == ' ')
		    {
		      blank = TRUE;
		    }
		  else if (isDecimalPoint(list[n]))
		    {
		      if (++state > 1)
			{
			  result = FALSE;
			  break;
			}
		    }
		  else if (!isDigit(list[n]))
		    {
		      result = FALSE;
		      break;