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id_subwins.c revision 1.2 
      1 /*
      2  * Copyright (c) 1981 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)id_subwins.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: id_subwins.c,v 1.2 1993/08/01 18:35:39 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 # include	"curses.ext"
     40 
     41 /*
     42  * _id_subwins:
     43  *	Re-sync the pointers to _y for all the subwindows.
     44  *
     45  */
     46 _id_subwins(orig)
     47 register WINDOW	*orig;
     48 {
     49 	register WINDOW	*win;
     50 	register int	realy;
     51 	register int	y, oy, x;
     52 
     53 	realy = orig->_begy + orig->_cury;
     54 	for (win = orig->_nextp; win != orig; win = win->_nextp) {
     55 		/*
     56 		 * If the window ends before our current position,
     57 		 * don't need to do anything.
     58 		 */
     59 		if (win->_begy + win->_maxy <= realy)
     60 			continue;
     61 
     62 		oy = orig->_cury;
     63 		for (y = realy - win->_begy; y < win->_maxy; y++, oy++)
     64 			win->_y[y] = &orig->_y[oy][win->_ch_off];
     65 	}
     66 }
     67