freebsd-dev/contrib/ncurses/form/fld_max.c

/****************************************************************************
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/****************************************************************************
 *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
 ****************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fld_max.c,v 1.5 2000/12/10 02:09:38 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnform  
|   Function      :  int set_max_field(FIELD *field, int maxgrow)
|   
|   Description   :  Set the maximum growth for a dynamic field. If maxgrow=0
|                    the field may grow to any possible size.
|
|   Return Values :  E_OK           - success
|                    E_BAD_ARGUMENT - invalid argument
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
set_max_field (FIELD *field, int maxgrow)
{
  if (!field || (maxgrow<0))
    RETURN(E_BAD_ARGUMENT);
  else
    {
      bool single_line_field = Single_Line_Field(field);

      if (maxgrow>0)
	{
	  if (( single_line_field && (maxgrow < field->dcols)) ||
	      (!single_line_field && (maxgrow < field->drows)))
	    RETURN(E_BAD_ARGUMENT);
	}
      field->maxgrow = maxgrow;
      field->status &= ~_MAY_GROW;
      if (!(field->opts & O_STATIC))
	{
	  if ((maxgrow==0) ||
	      ( single_line_field && (field->dcols < maxgrow)) ||
	      (!single_line_field && (field->drows < maxgrow)))
	    field->status |= _MAY_GROW;
	}
    }
  RETURN(E_OK);
}
		  
/* fld_max.c ends here */