lib/lp/dellist.c

/*
 * 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) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#ident  "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.8   */
/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "string.h"
#include "stdlib.h"

#include "lp.h"

/**
 ** dellist() - REMOVE ITEM FROM (char **) LIST
 **/

int
#if defined(__STDC__)
dellist (
    char ***        plist,
    char *          item
)
#else
dellist (plist, item)
    register char       ***plist,
                *item;
#endif
{
    register char       **pl;

    register int        n;

    if (*plist) {

        n = lenlist(*plist);

        for (pl = *plist; *pl; pl++)
            if (STREQU(*pl, item))
                break;

        if (*pl) {
            Free (*pl);
            for (; *pl; pl++)
                *pl = *(pl+1);
            if (--n == 0) {
                Free ((char *)*plist);
                *plist = 0;
            } else {
                *plist = (char **)Realloc(
                    (char *)*plist,
                    (n + 1) * sizeof(char *)
                );
                if (!*plist) {
                    errno = ENOMEM;
                    return (-1);
                }
/*              (*plist)[n] = 0; */ /* done in "for" loop */
            }
        }

    }

    return (0);
}