Commit | Line | Data |
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6b32aa07 | 1 | #ifndef lint |
29da1d26 | 2 | static char *sccsid = "@(#)lookup.c 1.3 (Berkeley) %G%"; |
6b32aa07 PK |
3 | #endif lint |
4 | ||
31f0a970 | 5 | #include "gprof.h" |
6b32aa07 PK |
6 | |
7 | /* | |
8 | * look up an address in a sorted-by-address namelist | |
9 | * this deals with misses by mapping them to the next lower | |
10 | * entry point. | |
11 | */ | |
12 | nltype * | |
13 | nllookup( address ) | |
14 | unsigned long address; | |
15 | { | |
16 | register long low; | |
17 | register long middle; | |
18 | register long high; | |
19 | # ifdef DEBUG | |
20 | register int probes; | |
21 | ||
22 | probes = 0; | |
23 | # endif DEBUG | |
24 | for ( low = 0 , high = nname - 1 ; low != high ; ) { | |
25 | # ifdef DEBUG | |
26 | probes += 1; | |
27 | # endif DEBUG | |
28 | middle = ( high + low ) >> 1; | |
29 | if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) { | |
30 | # ifdef DEBUG | |
29da1d26 | 31 | if ( debug & LOOKUPDEBUG ) { |
6b32aa07 PK |
32 | printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 ); |
33 | } | |
34 | # endif DEBUG | |
35 | return &nl[ middle ]; | |
36 | } | |
37 | if ( nl[ middle ].value > address ) { | |
38 | high = middle; | |
39 | } else { | |
40 | low = middle + 1; | |
41 | } | |
42 | } | |
43 | fprintf( stderr , "[nllookup] binary search fails???\n" ); | |
44 | return 0; | |
45 | } | |
46 | ||
47 | arctype * | |
48 | arclookup( parentp , childp ) | |
49 | nltype *parentp; | |
50 | nltype *childp; | |
51 | { | |
52 | arctype *arcp; | |
53 | ||
54 | if ( parentp == 0 || childp == 0 ) { | |
55 | fprintf( "[arclookup] parentp == 0 || childp == 0\n" ); | |
56 | return 0; | |
57 | } | |
58 | # ifdef DEBUG | |
29da1d26 | 59 | if ( debug & LOOKUPDEBUG ) { |
6b32aa07 PK |
60 | printf( "[arclookup] parent %s child %s\n" , |
61 | parentp -> name , childp -> name ); | |
62 | } | |
63 | # endif DEBUG | |
64 | for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) { | |
65 | # ifdef DEBUG | |
29da1d26 | 66 | if ( debug & LOOKUPDEBUG ) { |
6b32aa07 PK |
67 | printf( "[arclookup]\t arc_parent %s arc_child %s\n" , |
68 | arcp -> arc_parentp -> name , | |
69 | arcp -> arc_childp -> name ); | |
70 | } | |
71 | # endif DEBUG | |
72 | if ( arcp -> arc_childp == childp ) { | |
73 | return arcp; | |
74 | } | |
75 | } | |
76 | return 0; | |
77 | } |