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#!/bin/sh
#
# $Header: /cel/swd/usr/iag/cxref/RCS/tree.pl,v 1.2 2000/01/06 14:14:47 iag Exp $
#
# Converts the cxref.function output file into a format that can display
# a simple tree structure
#
# Warning: This is my first perl program. It can probably be improved on !
#
# This file Copyright 2000 Ian A. Gilmour.
# (ian@igilmour.freeserve.co.uk / ian.gilmour.ffei.co.uk)
#
# It may be distributed under the GNU Public License, version 2, or
# any higher version. See section COPYING of the GNU Public license
# for conditions under which this file may be redistributed.
#
exec perl -w -x $0 $*
#!perl
$level = 0;
$func = "main";
$max_level = 3;
$found = 0;
# generates the tree going down
# i.e. displays which functions are called by the given function
#
sub find_func {
my $func_reqd = $_[0];
if ($level > $max_level) {
return;
} else {
$level++;
}
for ($z=0; $z < ($level-1)*3; $z++) {
print " ";
}
print "+- ";
if (defined ($functions{$func_reqd})) {
print "$func_reqd() \t[$file{$func_reqd}]";
if($scope{$func_reqd}==2) {
print " \t(static)";
}
if ($fshown{$func_reqd}) {
print " \t...referenced above\n";
} else {
print "\n";
$fshown{$func_reqd} = 1;
for (my $y=0; $y <= $fcount{$func_reqd}; $y++) {
find_func ($fcalls{$func_reqd}[$y]);
}
}
} else {
if (!defined ($fundefshown{$func_reqd})) {
print "$func_reqd() \t[undefined]\n";
$fundefshown{$func_reqd} = 1;
} else {
print "$func_reqd() \t[undefined] \t...referenced above\n";
}
}
$level--;
}
# generates the tree going up
# i.e finds which functions call the specified function
#
sub find_called_func {
my $func_reqd = $_[0];
if ($level <= $max_level) {
return;
} else {
$level--;
}
foreach my $func (keys %functions) {
if (defined ($fcount{$func})) {
for (my $y=0; $y <= $fcount{$func}; $y++) {
if ($func_reqd eq $fcalls{$func}[$y]) {
if (!$found) {
$found = 1;
print "+- $func_reqd()\n";
}
for (my $z=0; $z > (($level)*3); $z--) {
print " ";
}
print "+- ";
print "$functions{$func} \t[$file{$func}]";
if($scope{$func}==1) {
print " \t(static)";
}
if ($fshown{$func}) {
print " \t...referenced above\n";
} else {
print "\n";
$fshown{$func} = 1;
find_called_func ($functions{$func});
}
}
}
}
}
$level++;
if (!$found) {
print "$func_reqd() not referenced.\n";
};
return;
}
die "Usage: $0 cxref_function_file root_function max_level\n".
"max_level +ve for functions called by specified function\n".
"max_level -ve for functions that call specified function\n" if($#ARGV==-1);
if (defined ($ARGV[2])) {
$max_level = $ARGV[2];
};
if (defined ($ARGV[1])) {
$func = $ARGV[1];
};
open(FUNCTION,"<$ARGV[0]") || die "Cannot open $ARGV[0]\n";
# read all function names in once to set up database
#
while(<FUNCTION>) {
s/\%//g;
s/\&//g;
chop;
($file,$function,$scope,@calls)=split(/ /);
if((defined ($scope)) && (($scope==2) || ($scope==1))) {
$scope{$function}="$scope";
$functions{$function}="$function";
$file{$function}="$file";
if (defined (@calls)) {
$fcalls{$function} = [@calls];
$fcount{$function} = $#calls;
$fshown{$function} = 0;
} else {
$fcount{$function} = -1;
}
}
}
close(FUNCTION);
# now display reqd info....
#
if ($max_level >= 0) {
print "Looking for functions that $func() calls...\n";
find_func ($func);
} else {
print "Looking for functions that call $func()...\n";
find_called_func ($func);
}
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