contrib/ncurses-5.4/form/fld_max.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2002,2003 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 1.7 2003/10/25 15:17:08 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   if (!field || (maxgrow<0))
  51     RETURN(E_BAD_ARGUMENT);
  52   else
  53     {
  54       bool single_line_field = Single_Line_Field(field);
  55
  56       if (maxgrow>0)
  57         {
  58           if (( single_line_field && (maxgrow < field->dcols)) ||
  59               (!single_line_field && (maxgrow < field->drows)))
  60             RETURN(E_BAD_ARGUMENT);
  61         }
  62       field->maxgrow = maxgrow;
  63       field->status &= ~_MAY_GROW;
  64       if (!(field->opts & O_STATIC))
  65         {
  66           if ((maxgrow==0) ||
  67               ( single_line_field && (field->dcols < maxgrow)) ||
  68               (!single_line_field && (field->drows < maxgrow)))
  69             field->status |= _MAY_GROW;
  70         }
  71     }
  72   RETURN(E_OK);
  73 }
  74
  75 /* fld_max.c ends here */