usr/src/ucblib/libcurses/id_subwins.c

   1 /*
   2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
   7 /*        All Rights Reserved   */
   8
   9 /*
  10  * Copyright (c) 1980 Regents of the University of California.
  11  * All rights reserved.  The Berkeley software License Agreement
  12  * specifies the terms and conditions for redistribution.
  13  */
  14
  15 #pragma ident   "%Z%%M% %I%     %E% SMI"
  16
  17 /*LINTLIBRARY*/
  18
  19 #ifndef lint
  20 static char
  21 sccsid[] = "@(#)id_subwins.c 1.3 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
  22 #endif  /* not lint */
  23
  24 #include        "curses.ext"
  25
  26 /*
  27  * _id_subwins:
  28  *      Re-sync the pointers to _y for all the subwindows.
  29  */
  30
  31 void
  32 _id_subwins(WINDOW *orig)
  33 {
  34         WINDOW  *win;
  35         int     realy;
  36         int     y, oy;
  37
  38         realy = orig->_begy + orig->_cury;
  39         for (win = orig->_nextp; win != orig; win = win->_nextp) {
  40                 /*
  41                  * If the window ends before our current position,
  42                  * don't need to do anything.
  43                  */
  44                 if (win->_begy + win->_maxy <= realy)
  45                         continue;
  46
  47                 oy = orig->_cury;
  48                 for (y = realy - win->_begy; y < win->_maxy; y++, oy++)
  49                         win->_y[y] = &orig->_y[oy][win->_ch_off];
  50         }
  51 }