978ab4ad4e
cell, as they are merged when characters are added. Remove the per cell storage and clarify the manual page. Pointed out by ruibiao@.
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* $NetBSD: erase.c,v 1.19 2006/01/15 11:43:54 jdc Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)erase.c 8.2 (Berkeley) 5/4/94";
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#else
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__RCSID("$NetBSD: erase.c,v 1.19 2006/01/15 11:43:54 jdc Exp $");
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#endif
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#endif /* not lint */
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#include "curses.h"
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#include "curses_private.h"
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#ifndef _CURSES_USE_MACROS
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/*
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* erase --
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* Erases everything on stdscr.
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*/
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int
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erase(void)
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{
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return werase(stdscr);
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}
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#endif
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/*
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* werase --
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* Erases everything on the window.
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*/
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int
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werase(WINDOW *win)
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{
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int y;
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__LDATA *sp, *end, *start;
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attr_t attr;
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#ifdef DEBUG
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__CTRACE("werase: (%p)\n", win);
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#endif
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if (__using_color && win != curscr)
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attr = __default_color;
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else
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attr = 0;
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for (y = 0; y < win->maxy; y++) {
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start = win->lines[y]->line;
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end = &start[win->maxx];
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for (sp = start; sp < end; sp++)
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if (sp->ch != ' ' || sp->attr != 0) {
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sp->ch = ' ';
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sp->attr = attr;
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}
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}
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/*
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* Mark the whole window as changed in case we have overlapping
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* windows - this will result in the (intended) clearing of the
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* screen over the area covered by the window. */
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__touchwin(win);
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wmove(win, 0, 0);
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return (OK);
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}
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