/*
 * 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 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

#include        <sys/types.h>
#include        <string.h>
#include        <unistd.h>
#include        "curses_inc.h"

/*
 * Set a soft label.
 *
 * n:   label number
 * lab: the string
 * f:   0, 1, 2 for left, center, right-justification
 */

int
slk_set(int n, char *lab, int f)
{
        SLK_MAP *slk = SP->slk;
        int     len, slklen = slk->_len, left;
        char            *cp, nlab[LABLEN + 1];

        if ((slk == NULL) || f < 0 || f > 2 || n < 1 || n > slk->_num)
                return (ERR);

        /* 0-indexing internally */
        n--;

        if (lab == NULL) {
                lab = "";

        } else {
                /* chop lengthy label */
                /* LINTED */
                if ((len = (int) strlen(lab)) > slklen)
                        lab[len = slklen] = '\0';
        }

        /* make the new display label */
        for (cp = nlab + slklen - 1; cp >= nlab; cp--)
                *cp = ' ';
        nlab[slklen] = '\0';
        if (f == 0)
                left = 0;
        else
                left = (slklen - len) / ((f == 1) ? 2 : 1);

        (void) memcpy(nlab + left, lab, len);

        if (strcmp(slk->_ldis[n], nlab) != 0) {
                (void) memcpy(slk->_lval[n], lab, len + 1);
                (void) memcpy(slk->_ldis[n], nlab, slklen + 1);
                slk->_changed = slk->_lch[n] = TRUE;
        }

        return (OK);
}