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curses: Fix werase(3) wide character support 

We need to consider erasing all attributes, not just WA_ATTRIBUTES.
Fixes PR lib/23910.

While here, make the function a little more readable.
This commit is contained in:
roy 2020-03-11 23:47:40 +00:00
parent 5e81f724dc
commit 63d07d6408
1 changed files with 22 additions and 18 deletions
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28
lib/libcurses/erase.c
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@ -1,4 +1,4 @@
/* $NetBSD: erase.c,v 1.28 2019/06/09 07:40:14 blymn Exp $ */
/* $NetBSD: erase.c,v 1.29 2020/03/11 23:47:40 roy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)erase.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: erase.c,v 1.28 2019/06/09 07:40:14 blymn Exp $");
__RCSID("$NetBSD: erase.c,v 1.29 2020/03/11 23:47:40 roy Exp $");
#endif
#endif /* not lint */
@ -79,27 +79,31 @@ werase(WINDOW *win)
for (y = 0; y < win->maxy; y++) {
start = win->alines[y]->line;
end = &start[win->maxx];
for (sp = start; sp < end; sp++)
for (sp = start; sp < end; sp++) {
#ifndef HAVE_WCHAR
if (sp->ch != win->bch || sp->attr != 0) {
if (sp->ch == win->bch && sp->attr == 0)
continue;
#else
if (sp->ch != ( wchar_t )btowc(( int ) win->bch ) ||
(sp->attr & WA_ATTRIBUTES) != 0 || sp->nsp) {
#endif /* HAVE_WCHAR */
if (sp->ch == (wchar_t)btowc((int)win->bch) &&
sp->attr == 0 &&
sp->nsp == NULL)
continue;
#endif
if (sp->attr & __ALTCHARSET)
sp->attr = attr | __ALTCHARSET;
else
sp->attr = attr;
#ifdef HAVE_WCHAR
sp->ch = ( wchar_t )btowc(( int ) win->bch);
#ifndef HAVE_WCHAR
sp->ch = win->bch;
#else
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;
SET_WCOL(*sp, 1);
#endif /* HAVE_WCHAR */
}
}
/*
* Mark the whole window as changed in case we have overlapping
* windows - this will result in the (intended) clearing of the