minix/lib/libcurses/erase.c

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/* $NetBSD: erase.c,v 1.25 2011/07/10 12:11:49 blymn Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)erase.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: erase.c,v 1.25 2011/07/10 12:11:49 blymn Exp $");
#endif
#endif /* not lint */
#include <stdlib.h>
#include "curses.h"
#include "curses_private.h"
#ifndef _CURSES_USE_MACROS
/*
* erase --
* Erases everything on stdscr.
*/
int
erase(void)
{
return werase(stdscr);
}
#endif
/*
* werase --
* Erases everything on the window.
*/
int
werase(WINDOW *win)
{
int y;
__LDATA *sp, *end, *start;
attr_t attr;
#ifdef DEBUG
__CTRACE(__CTRACE_ERASE, "werase: (%p)\n", win);
#endif
if (win != curscr)
attr = win->battr & __ATTRIBUTES;
else
attr = 0;
for (y = 0; y < win->maxy; y++) {
start = win->alines[y]->line;
end = &start[win->maxx];
for (sp = start; sp < end; sp++)
#ifndef HAVE_WCHAR
if (sp->ch != win->bch || sp->attr != 0) {
#else
if (sp->ch != ( wchar_t )btowc(( int ) win->bch ) ||
(sp->attr & WA_ATTRIBUTES) != 0 || sp->nsp) {
#endif /* HAVE_WCHAR */
if (sp->attr & __ALTCHARSET)
sp->attr = attr | __ALTCHARSET;
else
sp->attr = attr;
#ifdef HAVE_WCHAR
sp->ch = ( wchar_t )btowc(( int ) win->bch);
if (_cursesi_copy_nsp(win->bnsp, sp) == ERR)
return ERR;
SET_WCOL( *sp, 1 );
#else
sp->ch = win->bch;
#endif /* HAVE_WCHAR */
}
}
/*
* Mark the whole window as changed in case we have overlapping
* windows - this will result in the (intended) clearing of the
* screen over the area covered by the window. */
__touchwin(win);
wmove(win, 0, 0);
return (OK);
}