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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [inet_neta.c] - Blame information for rev 173

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1 30 unneback
/*
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 * Copyright (c) 1996 by Internet Software Consortium.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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 * SOFTWARE.
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 */
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char orig_rcsid[] = "From Id: inet_neta.c,v 8.2 1996/08/08 06:54:44 vixie Exp";
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static const char rcsid[] = "$Id: inet_neta.c,v 1.2 2001-09-27 12:01:53 chris Exp $";
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#endif
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef SPRINTF_CHAR
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# define SPRINTF(x) strlen(sprintf/**/x)
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#else
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# define SPRINTF(x) ((size_t)sprintf x)
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#endif
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/*
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 * char *
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 * inet_neta(src, dst, size)
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 *      format a u_long network number into presentation format.
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 * return:
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 *      pointer to dst, or NULL if an error occurred (check errno).
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 * note:
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 *      format of ``src'' is as for inet_network().
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 * author:
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 *      Paul Vixie (ISC), July 1996
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 */
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char *
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inet_neta(src, dst, size)
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        u_long src;
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        char *dst;
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        size_t size;
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{
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        char *odst = dst;
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        char *tp;
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        while (src & 0xffffffff) {
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                u_char b = (src & 0xff000000) >> 24;
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                src <<= 8;
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                if (b) {
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                        if (size < sizeof "255.")
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                                goto emsgsize;
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                        tp = dst;
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                        dst += SPRINTF((dst, "%u", b));
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                        if (src != 0L) {
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                                *dst++ = '.';
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                                *dst = '\0';
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                        }
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                        size -= (size_t)(dst - tp);
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                }
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        }
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        if (dst == odst) {
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                if (size < sizeof "0.0.0.0")
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                        goto emsgsize;
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                strcpy(dst, "0.0.0.0");
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        }
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        return (odst);
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 emsgsize:
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        errno = EMSGSIZE;
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        return (NULL);
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}

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