112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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/*static char sccsid[] = "from: @(#)lookup.c 5.5 (Berkeley) 2/6/91";*/
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static char rcsid[] = "$Id: lookup.c,v 1.2 1993/08/01 18:15:09 mycroft Exp $";
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#endif /* not lint */
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#include "gprof.h"
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/*
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* look up an address in a sorted-by-address namelist
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* this deals with misses by mapping them to the next lower
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* entry point.
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*/
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nltype *
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nllookup( address )
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unsigned long address;
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{
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register long low;
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register long middle;
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register long high;
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# ifdef DEBUG
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register int probes;
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probes = 0;
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# endif DEBUG
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for ( low = 0 , high = nname - 1 ; low != high ; ) {
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# ifdef DEBUG
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probes += 1;
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# endif DEBUG
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middle = ( high + low ) >> 1;
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if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) {
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# ifdef DEBUG
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if ( debug & LOOKUPDEBUG ) {
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printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 );
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}
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# endif DEBUG
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return &nl[ middle ];
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}
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if ( nl[ middle ].value > address ) {
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high = middle;
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} else {
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low = middle + 1;
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}
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}
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fprintf( stderr , "[nllookup] binary search fails???\n" );
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return 0;
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}
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arctype *
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arclookup( parentp , childp )
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nltype *parentp;
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nltype *childp;
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{
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arctype *arcp;
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if ( parentp == 0 || childp == 0 ) {
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fprintf( stderr, "[arclookup] parentp == 0 || childp == 0\n" );
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return 0;
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}
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# ifdef DEBUG
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if ( debug & LOOKUPDEBUG ) {
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printf( "[arclookup] parent %s child %s\n" ,
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parentp -> name , childp -> name );
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}
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# endif DEBUG
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for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
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# ifdef DEBUG
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if ( debug & LOOKUPDEBUG ) {
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printf( "[arclookup]\t arc_parent %s arc_child %s\n" ,
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arcp -> arc_parentp -> name ,
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arcp -> arc_childp -> name );
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}
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# endif DEBUG
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if ( arcp -> arc_childp == childp ) {
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return arcp;
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}
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}
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return 0;
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}
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