glibc/inet/inet_netof.c
Roland McGrath c5598d4721 * include/libc-symbols.h (hidden_weak): Define it for [__ASSEMBLER__].
* sysdeps/unix/make-syscalls.sh: Generate libc_hidden_def or
	libc_hidden_weak for every system call symbol defined.

	* include/time.h: Use libc_hidden_proto for time, asctime, mktime,
	timelocal, localtime, strftime.
	* time/asctime.c: Add libc_hidden_def.
	* time/mktime.c: Likewise.
	* time/localtime.c: Likewise.
	* time/strftime.c: Likewise.
	* time/strptime.c: Likewise.
	* sysdeps/generic/time.c: Likewise.
	* sysdeps/unix/time.c: Likewise.
	* sysdeps/unix/sysv/i386/time.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/time.S: Likewise.

	* include/arpa/inet.h: Use libc_hidden_proto for inet_ntop, inet_pton.
	inet_makeaddr, inet_netof, inet_addr, __inet_addr.
	* resolv/inet_ntop.c: Likewise.
	* resolv/inet_pton.c: Likewise.
	* inet/inet_mkadr.c: Add libc_hidden_def.
	* inet/inet_netof.c: Likewise.
	* resolv/inet_addr.c: Likewise.

	* include/libc-symbols.h: Remove `defined HAVE_BROKEN_ALIAS_ATTRIBUTE'
	clauses from conditionals for now.  Will have to be fixed later
	for older compilers.
2002-08-03 12:09:37 +00:00

56 lines
2.2 KiB
C

/*
* Copyright (c) 1983, 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.
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)inet_netof.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/*
* Return the network number from an internet
* address; handles class a/b/c network #'s.
*/
u_int32_t
inet_netof(in)
struct in_addr in;
{
register u_int32_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
else if (IN_CLASSB(i))
return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
else
return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
}
libc_hidden_def (inet_netof)