source: rtems/cpukit/libnetworking/libc/iso_addr.c @ 96b39164

/*
 * 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.
 *
 *  $Id$
 */

#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;
}