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touchwin.c revision 1.3 
      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: @(#)touchwin.c	5.5 (Berkeley) 8/23/92";*/
     36 static char rcsid[] = "$Id: touchwin.c,v 1.3 1993/08/07 05:49:08 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 #include <curses.h>
     40 
     41 /*
     42  * touchwin --
     43  *	Make it look like the whole window has been changed.
     44  */
     45 int
     46 touchwin(win)
     47 	register WINDOW *win;
     48 {
     49 	register int y, maxy;
     50 
     51 #ifdef DEBUG
     52 	__TRACE("touchwin: (%0.2o)\n", win);
     53 #endif
     54 	maxy = win->_maxy;
     55 	for (y = 0; y < maxy; y++)
     56 		touchline(win, y, 0, win->_maxx - 1);
     57 	return (OK);
     58 }
     59 
     60 /*
     61  * touchline --
     62  *	Touch a given line.
     63  */
     64 int
     65 touchline(win, y, sx, ex)
     66 	register WINDOW *win;
     67 	register int y, sx, ex;
     68 {
     69 #ifdef DEBUG
     70 	__TRACE("touchline: (%0.2o, %d, %d, %d)\n", win, y, sx, ex);
     71 	__TRACE("touchline: first = %d, last = %d\n",
     72 	    win->_firstch[y], win->_lastch[y]);
     73 #endif
     74 	sx += win->_ch_off;
     75 	ex += win->_ch_off;
     76 	if (win->_firstch[y] == _NOCHANGE) {
     77 		win->_firstch[y] = sx;
     78 		win->_lastch[y] = ex;
     79 	} else {
     80 		if (win->_firstch[y] > sx)
     81 			win->_firstch[y] = sx;
     82 		if (win->_lastch[y] < ex)
     83 			win->_lastch[y] = ex;
     84 	}
     85 #ifdef DEBUG
     86 	__TRACE("touchline: first = %d, last = %d\n",
     87 	    win->_firstch[y], win->_lastch[y]);
     88 #endif
     89 	return (OK);
     90 }
     91