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/*
* lib/krb5/krb/addr_order.c
*
* Copyright 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_address_order()
*/
#include "k5-int.h"
#ifndef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#endif
/*
* Return an ordering on two addresses: 0 if the same,
* < 0 if first is less than 2nd, > 0 if first is greater than 2nd.
*/
int
krb5_address_order(context, addr1, addr2)
krb5_context context;
register const krb5_address *addr1;
register const krb5_address *addr2;
{
int dir;
register int i;
const int minlen = min(addr1->length, addr2->length);
if (addr1->addrtype != addr2->addrtype)
return(FALSE);
dir = addr1->length - addr2->length;
for (i = 0; i < minlen; i++) {
if ((unsigned char) addr1->contents[i] <
(unsigned char) addr2->contents[i])
return -1;
else if ((unsigned char) addr1->contents[i] >
(unsigned char) addr2->contents[i])
return 1;
}
/* compared equal so far...which is longer? */
return dir;
}
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