libc/xcurses/win_wchn.c

	win_wchn.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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) 1995-1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/* LINTLIBRARY */

/*
 * win_wchn.c
 *
 * XCurses Library
 *
 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
 *
 */

#if M_RCSID
#ifndef lint
static char rcsID[] =
"$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
"libxcurses/src/libc/xcurses/rcs/win_wchn.c 1.2 1998/05/22 17:57:05 "
"cbates Exp $";
#endif
#endif

#include <private.h>

int
win_wchnstr(WINDOW *w, cchar_t *ccs, int n)
{
    int x, eol;
    cchar_t null = { 0 };

    eol = (n < 0 || w->_maxx < w->_curx + n) ? w->_maxx : w->_curx + n;

    for (x = w->_curx; x < eol; ++ccs) {
        *ccs = w->_line[w->_cury][x];
        ccs->_f = 1;

        x = __m_cc_next(w, w->_cury, x);
    }

    /*
     * For an unbounded buffer or a buffer with room remaining,
     * null terminate the buffer.
     */
    if (n < 0 || eol < w->_curx + n) {
        *ccs = null;
    }

    return (OK);
}