1 /* 2 * Copyright (c) 1981, 1993 3 * The Regents of the University of California. 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 /* from: static char sccsid[] = "@(#)erase.c 8.1 (Berkeley) 6/4/93"; */ 36 static char *rcsid = "$Id: erase.c,v 1.6 1993/11/09 04:07:29 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <curses.h> 40 41 /* 42 * werase -- 43 * Erases everything on the window. 44 */ 45 int 46 werase(win) 47 register WINDOW *win; 48 { 49 50 register int minx, y; 51 register __LDATA *sp, *end, *start, *maxx; 52 53 #ifdef DEBUG 54 __CTRACE("werase: (%0.2o)\n", win); 55 #endif 56 for (y = 0; y < win->maxy; y++) { 57 minx = -1; 58 start = win->lines[y]->line; 59 end = &start[win->maxx]; 60 for (sp = start; sp < end; sp++) 61 if (sp->ch != ' ' || sp->attr != 0) { 62 maxx = sp; 63 if (minx == -1) 64 minx = sp - start; 65 sp->ch = ' '; 66 sp->attr = 0; 67 } 68 if (minx != -1) 69 __touchline(win, y, minx, maxx - win->lines[y]->line, 70 0); 71 } 72 return (OK); 73 } 74