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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [inet/] [inet_net.c] - Blame information for rev 1771

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Line No. Rev Author Line
1 1325 phoenix
/*
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 * Copyright (c) 1983, 1993
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 *      The Regents of the University of California.  All rights reserved.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *      This product includes software developed by the University of
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 *      California, Berkeley and its contributors.
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 * 4. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#define __FORCE_GLIBC
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#include <features.h>
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#include <ctype.h>
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#include <netinet/in.h>
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/*
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 * Internet network address interpretation routine.
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 * The library routines call this routine to interpret
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 * network numbers.
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 */
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in_addr_t
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inet_network(const char *cp)
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{
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        register in_addr_t val, base, n;
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        register char c;
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        in_addr_t parts[4], *pp = parts;
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        register int i;
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again:
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        /*
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         * Collect number up to ``.''.
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         * Values are specified as for C:
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         * 0x=hex, 0=octal, other=decimal.
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         */
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        val = 0; base = 10;
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        /*
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         * The 4.4BSD version of this file also accepts 'x__' as a hexa
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         * number.  I don't think this is correct.  -- Uli
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         */
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        if (*cp == '0') {
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                if (*++cp == 'x' || *cp == 'X')
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                        base = 16, cp++;
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                else
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                        base = 8;
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        }
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        while ((c = *cp)) {
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                if (isdigit(c)) {
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                        val = (val * base) + (c - '0');
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                        cp++;
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                        continue;
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                }
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                if (base == 16 && isxdigit(c)) {
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                        val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
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                        cp++;
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                        continue;
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                }
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                break;
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        }
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        if (*cp == '.') {
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                if (pp >= parts + 4)
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                        return (INADDR_NONE);
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                *pp++ = val, cp++;
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                goto again;
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        }
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        if (*cp && !isspace(*cp))
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                return (INADDR_NONE);
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        *pp++ = val;
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        n = pp - parts;
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        if (n > 4)
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                return (INADDR_NONE);
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        for (val = 0, i = 0; i < n; i++) {
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                val <<= 8;
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                val |= parts[i] & 0xff;
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        }
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        return (val);
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}

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