1 /* $NetBSD: clrtobot.c,v 1.14 2000/05/20 15:12:15 mycroft 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[] = "@(#)clrtobot.c 8.2 (Berkeley) 5/4/94"; 40 #else 41 __RCSID("$NetBSD: clrtobot.c,v 1.14 2000/05/20 15:12:15 mycroft Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include "curses.h" 46 #include "curses_private.h" 47 48 #ifndef _CURSES_USE_MACROS 49 50 /* 51 * clrtobot -- 52 * Erase everything on stdscr. 53 */ 54 int 55 clrtobot(void) 56 { 57 return wclrtobot(stdscr); 58 } 59 60 #endif 61 62 /* 63 * wclrtobot -- 64 * Erase everything on the window. 65 */ 66 int 67 wclrtobot(WINDOW *win) 68 { 69 int minx, startx, starty, y; 70 __LDATA *sp, *end, *maxx; 71 72 #ifdef __GNUC__ 73 maxx = NULL; /* XXX gcc -Wuninitialized */ 74 #endif 75 if (win->lines[win->cury]->flags & __ISPASTEOL) { 76 starty = win->cury + 1; 77 startx = 0; 78 } else { 79 starty = win->cury; 80 startx = win->curx; 81 } 82 for (y = starty; y < win->maxy; y++) { 83 minx = -1; 84 end = &win->lines[y]->line[win->maxx]; 85 for (sp = &win->lines[y]->line[startx]; sp < end; sp++) 86 if (sp->ch != ' ' || sp->attr != 0 || 87 sp->bch != win->bch || sp->battr != win->battr) { 88 maxx = sp; 89 if (minx == -1) 90 minx = sp - win->lines[y]->line; 91 sp->ch = ' '; 92 sp->bch = win->bch; 93 sp->attr = 0; 94 sp->battr = win->battr; 95 } 96 if (minx != -1) 97 __touchline(win, y, minx, maxx - win->lines[y]->line); 98 startx = 0; 99 } 100 return (OK); 101 } 102