/*
 * Copyright (c) 1989, 1990, 1991 by the University of Washington
 *
 * For copying and distribution information, please see the file
 * <copyright.h>.
 */

#include <copyright.h>
#include <pfs.h>

/*
 * vl_comp - compare the names of two virtual links
 *
 *           VL_COMP compares the names of two links.  It returns
 *           0 if they are equal, negative if vl1 < vl2, and positive if
 *           vl1 > vl2.
 *
 *    ARGS:  vl1,vl2 - Virtual links to be compared
 * 
 * RETURNS:  0 if equal, + is vl1 > vl2, - if vl1 < vl2
 *
 *   NOTES:  Order of significance is as follows.  Existence,
 *           name.  If names do not exist, then hosttype, host,
 *           native filenametype, native filename.  The only time
 *           the name will not exist if if the link is a union link.
 */
int
vl_comp(vl1,vl2)
    VLINK	vl1;
    VLINK	vl2;
    {
	int	retval;

	if(vl1->name && !vl2->name) return(1);
	if(!vl1->name && vl2->name) return(-1);
	if(vl1->name && vl2->name && (*(vl1->name) || *(vl2->name)))
	    return(strcmp(vl1->name,vl2->name));

	retval = strcmp(vl1->hosttype,vl2->hosttype);
	if(!retval) retval = strcmp(vl1->host,vl2->host);
	if(!retval) retval = strcmp(vl1->nametype,vl2->nametype);
	if(!retval) retval = strcmp(vl1->filename,vl2->filename);
	return(retval);
    }

/*
 * vl_equal - compare the values of two virtual links
 *
 *           VL_EQUAL compares the values of two links.  It returns
 *           1 if all important fields are the same, and 0 otherwise.
 *
 *    ARGS:  vl1,vl2 - Virtual links to be compared
 * 
 * RETURNS:  1 if equal, 0 if not equal
 *
 */
int
vl_equal(vl1,vl2)
    VLINK	vl1;
    VLINK	vl2;
    {
      return strcmp(vl1->name, vl2->name) == 0         &&
	     vl1->linktype == vl2->linktype            &&
	     strcmp(vl1->type, vl2->type) == 0         &&
	     strcmp(vl1->hosttype, vl2->hosttype) == 0 &&
	     strcmp(vl1->host, vl2->host) == 0         &&
	     strcmp(vl1->nametype, vl2->nametype) == 0 &&
	     strcmp(vl1->filename, vl2->filename) == 0 &&
	     vl1->version == vl2->version              &&
	     vl1->f_magic_no == vl2->f_magic_no        ;

    }

