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/* $OpenBSD: lib_erase.c,v 1.3 2010/01/12 23:22:05 nicm Exp $ */
/****************************************************************************
* Copyright (c) 1998,2000,2001 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
** lib_erase.c
**
** The routine werase().
**
*/
#include <curses.priv.h>
MODULE_ID("$Id: lib_erase.c,v 1.3 2010/01/12 23:22:05 nicm Exp $")
NCURSES_EXPORT(int)
werase(WINDOW *win)
{
int code = ERR;
int y;
NCURSES_CH_T blank;
NCURSES_CH_T *sp, *end, *start;
T((T_CALLED("werase(%p)"), win));
if (win) {
blank = win->_nc_bkgd;
for (y = 0; y <= win->_maxy; y++) {
start = win->_line[y].text;
end = &start[win->_maxx];
/*
* If this is a derived window, we have to handle the case where
* a multicolumn character extends into the window that we are
* erasing.
*/
if_WIDEC({
if (isWidecExt(start[0])) {
int x = (win->_parent != 0) ? (win->_begx) : 0;
while (x-- > 0) {
if (isWidecBase(start[-1])) {
--start;
break;
}
--start;
}
}
});
for (sp = start; sp <= end; sp++)
*sp = blank;
win->_line[y].firstchar = 0;
win->_line[y].lastchar = win->_maxx;
}
win->_curx = win->_cury = 0;
win->_flags &= ~_WRAPPED;
_nc_synchook(win);
code = OK;
}
returnCode(code);
}
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