payloads/libpayload/curses/form/fld_max.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2004,2010 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 #include "form.priv.h"
  34
  35 MODULE_ID("$Id: fld_max.c,v 1.10 2010/01/23 21:14:36 tom Exp $")
  36
  37 /*---------------------------------------------------------------------------
  38 |   Facility      :  libnform
  39 |   Function      :  int set_max_field(FIELD *field, int maxgrow)
  40 |
  41 |   Description   :  Set the maximum growth for a dynamic field. If maxgrow=0
  42 |                    the field may grow to any possible size.
  43 |
  44 |   Return Values :  E_OK           - success
  45 |                    E_BAD_ARGUMENT - invalid argument
  46 +--------------------------------------------------------------------------*/
  47 NCURSES_EXPORT(int)
  48 set_max_field(FIELD *field, int maxgrow)
  49 {
  50   T((T_CALLED("set_max_field(%p,%d)"), (void *)field, maxgrow));
  51
  52   if (!field || (maxgrow < 0))
  53     RETURN(E_BAD_ARGUMENT);
  54   else
  55     {
  56       bool single_line_field = Single_Line_Field(field);
  57
  58       if (maxgrow > 0)
  59         {
  60           if ((single_line_field && (maxgrow < field->dcols)) ||
  61               (!single_line_field && (maxgrow < field->drows)))
  62             RETURN(E_BAD_ARGUMENT);
  63         }
  64       field->maxgrow = maxgrow;
  65       field->status &= ~_MAY_GROW;
  66       if (!(field->opts & O_STATIC))
  67         {
  68           if ((maxgrow == 0) ||
  69               (single_line_field && (field->dcols < maxgrow)) ||
  70               (!single_line_field && (field->drows < maxgrow)))
  71             field->status |= _MAY_GROW;
  72         }
  73     }
  74   RETURN(E_OK);
  75 }
  76
  77 /* fld_max.c ends here */