/*
 * 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 1.3   */

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

#include "lp.h"

/**
 ** addstring() - ADD ONE STRING TO ANOTHER, ALLOCATING SPACE AS NEEDED
 **/

int
#if     defined(__STDC__)
addstring (
        char **                 dst,
        char *                  src
)
#else
addstring (dst, src)
        char                    **dst;
        char                    *src;
#endif
{
        size_t                  len;

        if (!dst || !src) {
                errno = EINVAL;
                return (-1);
        }

        len = strlen(src) + 1;

        if (*dst) {
                if (!(*dst = Realloc(*dst, strlen(*dst) + len))) {
                        errno = ENOMEM;
                        return (-1);
                }
        } else {
                if (!(*dst = Malloc(len))) {
                        errno = ENOMEM;
                        return (-1);
                }
                (*dst)[0] = '\0';
        }

        (void) strcat(*dst, src);
        return (0);
}