/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1997, by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#include <sys/types.h>
#include "curses_inc.h"
/*
* Shift right an interval of characters
*/
int
_mbinsshift(WINDOW *win, int len)
{
int x, y, maxx, mv;
chtype *wcp, *wp, *ep;
y = win->_cury;
x = win->_curx;
maxx = win->_maxx;
wcp = win->_y[y];
/* ASSERT(!ISCBIT(wcp[x])); */
/* shift up to a whole character */
if (_scrmax > 1) {
wp = wcp + maxx - 1;
if (ISMBIT(*wp)) {
reg chtype rb;
for (; wp >= wcp; --wp)
if (!ISCBIT(*wp))
break;
if (wp < wcp)
return (ERR);
rb = RBYTE(*wp);
if ((wp + _curs_scrwidth[TYPE(rb)]) > (wcp + maxx))
/*LINTED*/
maxx = (int)(wp - wcp);
}
}
/* see if any data need to move */
if ((mv = maxx - (x+len)) <= 0)
return (OK);
/* the end of the moved interval must be whole */
if (ISCBIT(wcp[x + mv]))
(void) _mbclrch(win, y, x + mv - 1);
/* move data */
ep = wcp + x + len;
for (wp = wcp + maxx - 1; wp >= ep; --wp)
*wp = *(wp - len);
/* clear a possible partial multibyte character */
if (ISMBIT(*wp))
for (ep = wp; ep >= wcp; --ep) {
mv = (int)(ISCBIT(*ep));
*ep = win->_bkgd;
if (!mv)
break;
}
/* update the change structure */
if (x < win->_firstch[y])
/*LINTED*/
win->_firstch[y] = (short)x;
win->_lastch[y] = maxx - 1;
return (OK);
}