/*
 * This file is part of the UCB release of Plan 9. It is subject to the license
 * terms in the LICENSE file found in the top-level directory of this
 * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
 * part of the UCB release of Plan 9, including this file, may be copied,
 * modified, propagated, or distributed except according to the terms contained
 * in the LICENSE file.
 */

#include <u.h>
#include <libc.h>
#include <jehanne/ctype.h>

/*
 *  make an address, add the defaults
 */
char *
jehanne_netmkaddr(const char *linear, const char *defnet, const char *defsrv)
{
	static char addr[256];
	char *cp;

	/*
	 *  dump network name
	 */
	cp = jehanne_strchr(linear, '!');
	if(cp == 0){
		if(defnet==0){
			if(defsrv)
				jehanne_snprint(addr, sizeof(addr), "net!%s!%s",
					linear, defsrv);
			else
				jehanne_snprint(addr, sizeof(addr), "net!%s", linear);
		}
		else {
			if(defsrv)
				jehanne_snprint(addr, sizeof(addr), "%s!%s!%s", defnet,
					linear, defsrv);
			else
				jehanne_snprint(addr, sizeof(addr), "%s!%s", defnet,
					linear);
		}
		return addr;
	}

	/*
	 *  if there is already a service, use it
	 */
	cp = jehanne_strchr(cp+1, '!');
	if(cp)
		return (char *)linear;

	/*
	 *  add default service
	 */
	if(defsrv == 0)
		return (char *)linear;
	jehanne_snprint(addr, sizeof(addr), "%s!%s", linear, defsrv);

	return addr;
}