For those into (voluntarily or otherwise) maintenance of someone else's code---in this case 25 megabytes of C++ written over time by various and sundry hands (of various and sundry talent), here is a script that might be of use. It uses the output of ctags as input (pipe fans out there know what to do...) with the result of a reasonably useful table in mySQL. 

#!/perl/bin/perl
#
# tag2msql.pl -- convert ctags -x output into a mysql table.
use strict;
use warnings;
use diagnostics;
use DBI;

my $dbh = DBI->connect( 'DBI:mysql:host=localhost;database=blitzen',
    '', '', { PrintError => 0, RaiseError => 1 } )
      or die "Cannot connect to Database\n";
my $theQuery;
my ($symbol,$type,$line_number,$file_name,$source);

while (<>) {
    if (/^operator/i) {
        /(.*?)\s+(.*?)\s+(.*?)\s+(.*?)\s+(.*?)\s+(.*)/;
        ($symbol,$type,$line_number,$file_name,$source) = ("$1 $2",$3,
+$4,$5,$6);
    }
    else {
        /(.*?)\s+(.*?)\s+(.*?)\s+(.*?)\s+(.*)/;
        ($symbol,$type,$line_number,$file_name,$source) = ($1,$2,$3,$4
+,$5);
    }
    $symbol = $dbh->quote($symbol);
    $type = $dbh->quote($type);
    $line_number = $dbh->quote($line_number);
    $file_name = $dbh->quote($file_name);
    $source = $dbh->quote($source);
    $theQuery = qq{
        INSERT symbols(symbol,type,line_number,file_name,source)
        VALUES($symbol,$type,$line_number,$file_name,$source)
    };
    $dbh->do($theQuery) or warn("Cannot do query\n");
}
$dbh->disconnect();

#mysql> describe symbol;
#+-------------+--------------+------+-----+---------+-------+
#| Field       | Type         | Null | Key | Default | Extra |
#+-------------+--------------+------+-----+---------+-------+
#| symbol      | varchar(250) |      | PRI |         |       |
#| type        | varchar(250) |      | MUL |         |       |
#| line_number | smallint(6)  |      | PRI | 0       |       |
#| file_name   | varchar(200) |      | PRI |         |       |
#| source      | varchar(250) |      |     |         |       |
#+-------------+--------------+------+-----+---------+-------+
#5 rows in set (0.00 sec)

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--hsm

"Never try to teach a pig to sing...it wastes your time and it annoys the pig."

In reply to Maintenance Archeology 101 by hsmyers

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