2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)lookup.c 8.1 (Berkeley) 6/6/93";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
46 * look up an address in a sorted-by-address namelist
47 * this deals with misses by mapping them to the next lower
52 unsigned long address;
62 for ( low = 0 , high = nname - 1 ; low != high ; ) {
66 middle = ( high + low ) >> 1;
67 if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) {
69 if ( debug & LOOKUPDEBUG ) {
70 printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 );
75 if ( nl[ middle ].value > address ) {
82 if ( debug & LOOKUPDEBUG ) {
83 fprintf( stderr , "[nllookup] (%d) binary search fails\n" ,
91 arclookup( parentp , childp )
97 if ( parentp == 0 || childp == 0 ) {
98 fprintf( stderr, "[arclookup] parentp == 0 || childp == 0\n" );
102 if ( debug & LOOKUPDEBUG ) {
103 printf( "[arclookup] parent %s child %s\n" ,
104 parentp -> name , childp -> name );
107 for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
109 if ( debug & LOOKUPDEBUG ) {
110 printf( "[arclookup]\t arc_parent %s arc_child %s\n" ,
111 arcp -> arc_parentp -> name ,
112 arcp -> arc_childp -> name );
115 if ( arcp -> arc_childp == childp ) {