1 /* $NetBSD: erase.c,v 1.9 1997/07/22 07:36:39 mikel Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)erase.c 8.2 (Berkeley) 5/4/94"; 40 #else 41 __RCSID("$NetBSD: erase.c,v 1.9 1997/07/22 07:36:39 mikel Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include "curses.h" 46 47 /* 48 * werase -- 49 * Erases everything on the window. 50 */ 51 int 52 werase(win) 53 register WINDOW *win; 54 { 55 56 register int minx, y; 57 register __LDATA *sp, *end, *start, *maxx; 58 59 #ifdef DEBUG 60 __CTRACE("werase: (%0.2o)\n", win); 61 #endif 62 #ifdef __GNUC__ 63 maxx = NULL; /* XXX gcc -Wuninitialized */ 64 #endif 65 for (y = 0; y < win->maxy; y++) { 66 minx = -1; 67 start = win->lines[y]->line; 68 end = &start[win->maxx]; 69 for (sp = start; sp < end; sp++) 70 if (sp->ch != ' ' || sp->attr != 0) { 71 maxx = sp; 72 if (minx == -1) 73 minx = sp - start; 74 sp->ch = ' '; 75 sp->attr = 0; 76 } 77 if (minx != -1) 78 __touchline(win, y, minx, maxx - win->lines[y]->line, 79 0); 80 } 81 wmove(win, 0, 0); 82 return (OK); 83 } 84