1 /* $NetBSD: clrtobot.c,v 1.18 2006/02/05 17:39:52 jdc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)clrtobot.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: clrtobot.c,v 1.18 2006/02/05 17:39:52 jdc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "curses.h" 42 #include "curses_private.h" 43 44 #ifndef _CURSES_USE_MACROS 45 46 /* 47 * clrtobot -- 48 * Erase everything on stdscr. 49 */ 50 int 51 clrtobot(void) 52 { 53 return wclrtobot(stdscr); 54 } 55 56 #endif 57 58 /* 59 * wclrtobot -- 60 * Erase everything on the window. 61 */ 62 int 63 wclrtobot(WINDOW *win) 64 { 65 int minx, startx, starty, y; 66 __LDATA *sp, *end, *maxx; 67 attr_t attr; 68 69 #ifdef __GNUC__ 70 maxx = NULL; /* XXX gcc -Wuninitialized */ 71 #endif 72 if (win->lines[win->cury]->flags & __ISPASTEOL) { 73 starty = win->cury + 1; 74 startx = 0; 75 } else { 76 starty = win->cury; 77 startx = win->curx; 78 } 79 if (__using_color && win != curscr) 80 attr = win->battr & __COLOR; 81 else 82 attr = 0; 83 for (y = starty; y < win->maxy; y++) { 84 minx = -1; 85 end = &win->lines[y]->line[win->maxx]; 86 for (sp = &win->lines[y]->line[startx]; sp < end; sp++) 87 if (sp->ch != win->bch || sp->attr != attr) { 88 maxx = sp; 89 if (minx == -1) 90 minx = sp - win->lines[y]->line; 91 sp->ch = win->bch; 92 sp->attr = attr; 93 } 94 if (minx != -1) 95 __touchline(win, y, minx, maxx - win->lines[y]->line); 96 startx = 0; 97 } 98 return (OK); 99 } 100