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/*

 * Copyright (c) 1989, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *  $Id: iso_addr.c,v 1.2 2001-09-27 12:01:53 chris Exp $

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)iso_addr.c  8.1 (Berkeley) 6/4/93";

#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <netiso/iso.h>

#include <string.h>

/* States*/

#define VIRGIN  0

#define GOTONE  1

#define GOTTWO  2

/* Inputs */

#define DIGIT   (4*0)

#define END     (4*1)

#define DELIM   (4*2)

struct iso_addr *

iso_addr(addr)

        register const char *addr;

{

        static struct iso_addr out_addr;

        register char *cp = out_addr.isoa_genaddr;

        char *cplim = cp + sizeof(out_addr.isoa_genaddr);

        register int byte = 0, state = VIRGIN, new;

        bzero((char *)&out_addr, sizeof(out_addr));

        do {

                if ((*addr >= '0') && (*addr <= '9')) {

                        new = *addr - '0';

                } else if ((*addr >= 'a') && (*addr <= 'f')) {

                        new = *addr - 'a' + 10;

                } else if ((*addr >= 'A') && (*addr <= 'F')) {

                        new = *addr - 'A' + 10;

                } else if (*addr == 0)

                        state |= END;

                else

                        state |= DELIM;

                addr++;

                switch (state /* | INPUT */) {

                case GOTTWO | DIGIT:

                        *cp++ = byte; /*FALLTHROUGH*/

                case VIRGIN | DIGIT:

                        state = GOTONE; byte = new; continue;

                case GOTONE | DIGIT:

                        state = GOTTWO; byte = new + (byte << 4); continue;

                default: /* | DELIM */

                        state = VIRGIN; *cp++ = byte; byte = 0; continue;

                case GOTONE | END:

                case GOTTWO | END:

                        *cp++ = byte; /* FALLTHROUGH */

                case VIRGIN | END:

                        break;

                }

                break;

        } while (cp < cplim);

        out_addr.isoa_len = cp - out_addr.isoa_genaddr;

        return (&out_addr);

}

static char hexlist[] = "0123456789abcdef";

char *

iso_ntoa(isoa)

        const struct iso_addr *isoa;

{

        static char tmpbuf[sizeof(isoa->isoa_genaddr)*3];

        const u_char *binary;

        char *cp;

        int i;

        binary = isoa->isoa_genaddr;

        cp = tmpbuf;

        for (i = 0; i < isoa->isoa_len; i++) {

                *cp++ = hexlist[*binary >> 4];

                *cp++ = hexlist[*binary++ & 0xf];

                if ((((i % 2) == 0) && ((i + 1) < isoa->isoa_len)))

                        *cp++ = '.';

        }

        *cp = '\0';

        return tmpbuf;

}