Subversion Repositories or1k

/*

 * Copyright (c) 1996 by Internet Software Consortium.

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS

 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE

 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL

 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR

 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS

 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 */

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

static const char orig_rcsid[] = "From Id: inet_neta.c,v 8.2 1996/08/08 06:54:44 vixie Exp";

static const char rcsid[] = "$Id: inet_neta.c,v 1.2 2001-09-27 12:01:53 chris Exp $";

#endif

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <errno.h>

#include <stdio.h>

#include <string.h>

#ifdef SPRINTF_CHAR

# define SPRINTF(x) strlen(sprintf/**/x)

#else

# define SPRINTF(x) ((size_t)sprintf x)

#endif

/*

 * char *

 * inet_neta(src, dst, size)

 *      format a u_long network number into presentation format.

 * return:

 *      pointer to dst, or NULL if an error occurred (check errno).

 * note:

 *      format of ``src'' is as for inet_network().

 * author:

 *      Paul Vixie (ISC), July 1996

 */

char *

inet_neta(src, dst, size)

        u_long src;

        char *dst;

        size_t size;

{

        char *odst = dst;

        char *tp;

        while (src & 0xffffffff) {

                u_char b = (src & 0xff000000) >> 24;

                src <<= 8;

                if (b) {

                        if (size < sizeof "255.")

                                goto emsgsize;

                        tp = dst;

                        dst += SPRINTF((dst, "%u", b));

                        if (src != 0L) {

                                *dst++ = '.';

                                *dst = '\0';

                        }

                        size -= (size_t)(dst - tp);

                }

        }

        if (dst == odst) {

                if (size < sizeof "0.0.0.0")

                        goto emsgsize;

                strcpy(dst, "0.0.0.0");

        }

        return (odst);

 emsgsize:

        errno = EMSGSIZE;

        return (NULL);

}