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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)erase.c 5.3 (Berkeley) 06/30/88"; 20 #endif /* not lint */ 21 22 # include "curses.ext" 23 24 /* 25 * This routine erases everything on the window. 26 * 27 */ 28 werase(win) 29 reg WINDOW *win; { 30 31 reg int y; 32 reg char *sp, *end, *start, *maxx; 33 reg int minx; 34 35 # ifdef DEBUG 36 fprintf(outf, "WERASE(%0.2o)\n", win); 37 # endif 38 for (y = 0; y < win->_maxy; y++) { 39 minx = _NOCHANGE; 40 start = win->_y[y]; 41 end = &start[win->_maxx]; 42 for (sp = start; sp < end; sp++) 43 if (*sp != ' ') { 44 maxx = sp; 45 if (minx == _NOCHANGE) 46 minx = sp - start; 47 *sp = ' '; 48 } 49 if (minx != _NOCHANGE) 50 touchline(win, y, minx, maxx - win->_y[y]); 51 } 52 win->_curx = win->_cury = 0; 53 } 54