1 /* $NetBSD: clrtobot.c,v 1.32 2024/12/23 02:58:03 blymn 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 1.32 2024/12/23 02:58:03 blymn Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include "curses.h" 43 #include "curses_private.h" 44 45 #ifndef _CURSES_USE_MACROS 46 47 /* 48 * clrtobot -- 49 * Erase everything on stdscr. 50 */ 51 int 52 clrtobot(void) 53 { 54 return wclrtobot(stdscr); 55 } 56 57 #endif 58 59 /* 60 * wclrtobot -- 61 * Erase everything on the window. 62 */ 63 int 64 wclrtobot(WINDOW *win) 65 { 66 int minx, startx, starty, y; 67 __LDATA *sp, *end, *maxx; 68 wchar_t bch; 69 attr_t battr; 70 71 if (__predict_false(win == NULL)) 72 return ERR; 73 74 bch = win->bch; 75 if (win != curscr) 76 battr = win->battr & __ATTRIBUTES; 77 else 78 battr = 0; 79 80 #ifdef __GNUC__ 81 maxx = NULL; /* XXX gcc -Wuninitialized */ 82 #endif 83 if (win->alines[win->cury]->flags & __ISPASTEOL) { 84 starty = win->cury + 1; 85 startx = 0; 86 } else { 87 starty = win->cury; 88 startx = win->curx; 89 } 90 91 for (y = starty; y < win->maxy; y++) { 92 minx = -1; 93 end = &win->alines[y]->line[win->maxx]; 94 for (sp = &win->alines[y]->line[startx]; sp < end; sp++) { 95 if (!(__NEED_ERASE(sp, bch, battr))) 96 continue; 97 98 maxx = sp; 99 if (minx == -1) 100 minx = (int)(sp - win->alines[y]->line); 101 102 sp->ch = bch; 103 sp->cflags |= CA_BACKGROUND; 104 sp->cflags &= CA_CONTINUATION; 105 sp->attr = battr | (sp->attr & __ALTCHARSET); 106 #ifdef HAVE_WCHAR 107 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 108 return ERR; 109 sp->wcols = 1; 110 #endif 111 } 112 113 if (minx != -1) 114 __touchline(win, y, minx, 115 (int)(maxx - win->alines[y]->line)); 116 startx = 0; 117 } 118 119 __sync(win); 120 return OK; 121 } 122