Libc-166.tar.gz

[apple/libc.git] / net.subproj / ns_ntoa.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1986, 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.
 * 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.
 */


#include <sys/param.h>
#include <netns/ns.h>
#include <stdio.h>

char *
ns_ntoa(addr)
	struct ns_addr addr;
{
	static char obuf[40];
	union { union ns_net net_e; u_long long_e; } net;
	u_short port = htons(addr.x_port);
	register char *cp;
	char *cp2;
	register u_char *up = addr.x_host.c_host;
	u_char *uplim = up + 6;
	static char *spectHex();

	net.net_e = addr.x_net;
	sprintf(obuf, "%lx", ntohl(net.long_e));
	cp = spectHex(obuf);
	cp2 = cp + 1;
	while (*up==0 && up < uplim) up++;
	if (up == uplim) {
		if (port) {
			sprintf(cp, ".0");
			cp += 2;
		}
	} else {
		sprintf(cp, ".%x", *up++);
		while (up < uplim) {
			while (*cp) cp++;
			sprintf(cp, "%02x", *up++);
		}
		cp = spectHex(cp2);
	}
	if (port) {
		sprintf(cp, ".%x", port);
		spectHex(cp + 1);
	}
	return (obuf);
}

static char *
spectHex(p0)
	char *p0;
{
	int ok = 0;
	int nonzero = 0;
	register char *p = p0;
	for (; *p; p++) switch (*p) {

	case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
		*p += ('A' - 'a');
		/* fall into . . . */
	case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
		ok = 1;
	case '1': case '2': case '3': case '4': case '5':
	case '6': case '7': case '8': case '9':
		nonzero = 1;
	}
	if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
	return (p);
}