/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

#pragma weak _addsev = addsev

#include "lint.h"
#include "mtlib.h"
#include "libc.h"
#include <stdlib.h>
#include <pfmt.h>
#include <thread.h>
#include "pfmt_data.h"
#include <sys/types.h>
#include <string.h>
#include <synch.h>

int
addsev(int severity, const char *string)
{
        int i, firstfree;
        void *new;

        /* Cannot redefine standard severity */
        if ((severity <= 4) || (severity > 255))
                return (-1);

        /* Locate severity in table */
        lrw_wrlock(&_rw_pfmt_sev_tab);
        for (i = 0, firstfree = -1; i < __pfmt_nsev; i++) {
                if (__pfmt_sev_tab[i].severity == 0 && firstfree == -1)
                        firstfree = i;
                if (__pfmt_sev_tab[i].severity == severity)
                        break;
        }

        if (i == __pfmt_nsev) {
                if (string == NULL)     /* Removing non-existing severity */
                        return (0);
                if (firstfree != -1)    /* Re-use old entry */
                        i = firstfree;
                else {
                        /* Allocate new entry */
                        new = libc_realloc(__pfmt_sev_tab,
                            sizeof (struct sev_tab) * (__pfmt_nsev + 1));
                        if (new == NULL) {
                                lrw_unlock(&_rw_pfmt_sev_tab);
                                return (-1);
                        }
                        __pfmt_nsev++;
                        __pfmt_sev_tab = new;
                }
        }
        if (string == NULL) {
                if (__pfmt_sev_tab[i].string)
                        libc_free(__pfmt_sev_tab[i].string);
                __pfmt_sev_tab[i].severity = 0;
                __pfmt_sev_tab[i].string = NULL;
                lrw_unlock(&_rw_pfmt_sev_tab);
                return (0);
        }
        new = libc_realloc(__pfmt_sev_tab[i].string, strlen(string) + 1);
        if (new == NULL) {
                lrw_unlock(&_rw_pfmt_sev_tab);
                return (-1);
        }
        __pfmt_sev_tab[i].severity = severity;
        __pfmt_sev_tab[i].string = new;
        (void) strcpy(__pfmt_sev_tab[i].string, string);
        lrw_unlock(&_rw_pfmt_sev_tab);
        return (0);
}