lib_touch.c

   1
   2 /***************************************************************************
   3 *                            COPYRIGHT NOTICE                              *
   4 ****************************************************************************
   5 *                ncurses is copyright (C) 1992-1995                        *
   6 *                          Zeyd M. Ben-Halim                               *
   7 *                          zmbenhal@netcom.com                             *
   8 *                          Eric S. Raymond                                 *
   9 *                          esr@snark.thyrsus.com                           *
  10 *                                                                          *
  11 *        Permission is hereby granted to reproduce and distribute ncurses  *
  12 *        by any means and for any fee, whether alone or as part of a       *
  13 *        larger distribution, in source or in binary form, PROVIDED        *
  14 *        this notice is included with any such distribution, and is not    *
  15 *        removed from any of its header files. Mention of ncurses in any   *
  16 *        applications linked with it is highly appreciated.                *
  17 *                                                                          *
  18 *        ncurses comes AS IS with no warranty, implied or expressed.       *
  19 *                                                                          *
  20 ***************************************************************************/
  21
  22 /*
  23 **      lib_touch.c
  24 **
  25 **         The routines untouchwin(),
  26 **                      wtouchln(),
  27 **                      is_linetouched()
  28 **                      is_wintouched().
  29 **
  30 */
  31
  32 #include <curses.priv.h>
  33
  34 MODULE_ID("$Id: lib_touch.c,v 1.3 1997/02/02 00:26:15 tom Exp $")
  35
  36 int is_linetouched(WINDOW *win, int line)
  37 {
  38         T((T_CALLED("is_linetouched(%p,%d)"), win, line));
  39
  40         /* XSI doesn't define any error */
  41         if (line > win->_maxy || line < 0)
  42                 returnCode(ERR);
  43
  44         returnCode(win->_line[line].firstchar != _NOCHANGE ? TRUE : FALSE);
  45 }
  46
  47 int is_wintouched(WINDOW *win)
  48 {
  49 int i;
  50
  51         T((T_CALLED("is_wintouched(%p)"), win));
  52
  53         for (i = 0; i <= win->_maxy; i++)
  54                 if (win->_line[i].firstchar != _NOCHANGE)
  55                         returnCode(TRUE);
  56         returnCode(FALSE);
  57 }
  58
  59 int wtouchln(WINDOW *win, int y, int n, int changed)
  60 {
  61 int i;
  62
  63         T((T_CALLED("wtouchln(%p,%d,%d,%d)"), win, y, n, changed));
  64
  65         for (i = y; i < y+n; i++) {
  66                 win->_line[i].firstchar = changed ? 0 : _NOCHANGE;
  67                 win->_line[i].lastchar = changed ? win->_maxx : _NOCHANGE;
  68         }
  69         returnCode(OK);
  70 }