inet_ntoa.c
上传用户:tany51
上传日期:2013-06-12
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文件大小:2k
- /*
- * Copyright (C) 1999 Ross Combs (rocombs@cs.nmsu.edu)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include "common/setup_before.h"
- #ifndef HAVE_INET_NTOA
- #include <stdio.h>
- #ifdef HAVE_STDDEF_H
- # include <stddef.h>
- #else
- # ifndef NULL
- # define NULL ((void *)0)
- # endif
- #endif
- #ifdef HAVE_SYS_TYPES
- # include <sys/types.h>
- #endif
- #ifdef HAVE_SYS_PARAM_H
- # include <sys/param.h>
- #endif
- #ifdef HAVE_NETINET_IN_H
- # include <netinet/in.h>
- #endif
- #ifdef HAVE_ARPA_INET_H
- # include <arpa/inet.h>
- #endif
- #include "inet_ntoa.h"
- #include "common/setup_after.h"
- extern char const * inet_ntoa(struct in_addr const * addr)
- {
- static char buff[16];
- unsigned long val;
-
- if (!addr)
- return NULL;
-
- val = ntohl(addr->s_addr);
- sprintf(buff,"%u.%u.%u.%u",
- (val>>24)&0xff,
- (val>>16)&0xff,
- (val>> 8)&0xff,
- (val )&0xff);
- return buff;
- }
- #else
- typedef int filenotempty; /* make ISO standard happy */
- #endif