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inet_ntoa.c
Package: mysql-3.23.35.tar.gz [view]
Upload User: tsgydb
Upload Date: 2007-04-14
Package Size: 10674k
Code Size: 3k
Category:
MySQL
Development Platform:
Visual C++
- /*
- * Copyright (c) 1983 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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 = "from: @(#)inet_ntoa.c 5.6 (Berkeley) 2/24/91";*/
- static char *rcsid = "$Id$";
- #endif /* LIBC_SCCS and not lint */
- /*
- * Convert network-format internet address
- * to base 256 d.d.d.d representation.
- */
- #include <pthread.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- char *inet_ntoa(struct in_addr in)
- {
- static pthread_mutex_t inet_ntoa_mutex = PTHREAD_MUTEX_INITIALIZER;
- static pthread_key_t inet_ntoa_key = -1;
- char *buf, *inet_ntoa_r();
- if (inet_ntoa_key < 0) {
- pthread_mutex_lock(&inet_ntoa_mutex);
- if (inet_ntoa_key < 0) {
- if (pthread_key_create(&inet_ntoa_key, free) < 0) {
- pthread_mutex_unlock(&inet_ntoa_mutex);
- return(NULL);
- }
- }
- pthread_mutex_unlock(&inet_ntoa_mutex);
- }
- if ((buf = pthread_getspecific(inet_ntoa_key)) == NULL) {
- if ((buf = (char *) malloc(18)) == NULL) {
- return(NULL);
- }
- pthread_setspecific(inet_ntoa_key, buf);
- }
- return inet_ntoa_r(in, buf, 18);
- }
- char *inet_ntoa_r(struct in_addr in, char *buf, int bufsize)
- {
- register char *p;
- p = (char *)∈
- #define UC(b) (((int)b)&0xff)
- (void)snprintf(buf, bufsize,
- "%d.%d.%d.%d", UC(p[0]), UC(p[1]), UC(p[2]), UC(p[3]));
- return (buf);
- }