ncurses/form/fld_max.c

/****************************************************************************
 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
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/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

#include "form.priv.h"

MODULE_ID("$Id: fld_max.c,v 1.9 2004/12/11 21:51:54 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)
{
  T((T_CALLED("set_max_field(%p,%d)"), field, 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 */