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#!/usr/local/bin/perl
## Copyright (C) 1994 The New York Group Theory Cooperative
## See magnus/doc/COPYRIGHT for the full notice.
## Contents: comment_ratios, which computes the ratio of comment characters
## to all characters, ignoring /*...*/, in all source, header, and
## Makefiles at and below the current directory.
##
## Principal Author: Roger Needham
##
## Status: Useable.
##
## Revision History:
##
## Next implementation steps:
##
$summary_p = 0;
while ( $#ARGV != -1 ) {
$_ = shift;
if ( /^-s$/ ) {
$summary_p = !$summary_p;
}
elsif ( /^-h$/ || /--help/) {
&help;
exit;
}
else {
print "Unknown option: $_\n\n";
&help;
exit 1;
}
}
$author_index = 0;
open( FIND, "/bin/find . -type f -print |");
while ($name = <FIND>) {
if ( !($name =~ /(\.([Chc]|mk|tcl)$)|Makefile/) &&
!((-x $name) && (-T $name)) ) { next; }
#@rn include .in files?
$sharp_p = !($name =~ /\.[Chc]$/);
chop $name;
open(FILE, $name) || print "** Couldn't open $name\n";
if ( !$summary_p ) { print "\n$name:\n"; }
$total_char_count = 0;
$C_comment_char_count = 0;
$Cpp_comment_char_count = 0;
$reading_C_comment = 0;
$did_author = 0;
@authors = ("anonymous");
while( $line = <FILE> ) {
if ( !$did_author && ($line =~ /Principal Author.*:\s*(.+)$/) ) {
$did_author = 1;
# Get authors(s) of this file:
@authors = split(/,\s*/, $1);
foreach $author (@authors) {
if ( $author_indices{$author} == 0 ) {
$author_indices{$author} = ++$author_index;
$author_names{$author_index} = $author;
$a_com_count{$author_index} = 1;
$a_tot_count{$author_index} = 1;
}
}
}
# Now count:
$len = length($line);
$total_char_count += $len;
if ( $reading_C_comment ) {
$pos = index($line, "*/");
if ( $pos >= 0 ) {
$reading_C_comment = 0;
$C_comment_char_count += $pos + 2;
} else {
$C_comment_char_count += $len;
}
} else {
# Decide whether $line contains a comment:
$pos = index($line, "/*");
if ( $pos >= 0 ) {
$reading_C_comment = 1;
$C_comment_char_count += $len - $pos;
} else {
if ( $sharp_p ) {
$pos = index($line, "#");
} else {
$pos = index($line, "//");
}
if ( $pos >= 0 ) {
$Cpp_comment_char_count += $len - $pos;
}
}
}
}
if ( !$did_author && $author_indices{"anonymous"} == 0 ) {
$author_indices{"anonymous"} = ++$author_index;
$author_names{$author_index} = "anonymous";
$a_com_count{$author_index} = 1;
$a_tot_count{$author_index} = 1;
}
$total = $total_char_count - $C_comment_char_count;
if ( $total != 0 ) {
$ratio = int( 100 * $Cpp_comment_char_count / $total );
} else { $ratio = 0; }
if ( !$summary_p ) { print "ratio: $ratio%\n"; }
# Don't count largely codeless files in summary:
if ( $ratio < 80 ) {
foreach $author (@authors) {
$i = $author_indices{$author};
$a_com_count{$i} += $Cpp_comment_char_count;
$a_tot_count{$i} += $total;
}
}
close(FILE);
}
close(FIND);
print "\n\nSummary by author:\n\n";
$i = 1;
while ( $i <= $author_index ) {
if ( $a_tot_count{$i} != 0 ) {
$ratio = int(100 * $a_com_count{$i} / $a_tot_count{$i});
} else { $ratio = 0; }
print " $ratio% $author_names{$i}\n";
++$i;
}
print "\n\n";
exit;
sub help {
print "\nThis computes the ratio of comment characters to all characters,\n";
print "ignoring /*...*/, in all source, header, and Makefiles at and\n";
print "below the current directory.\n";
print "Command line options:\n";
print "-s toggles summary mode. Default: $summary_p\n";
print "-h\n";
print "--help prints this and quits\n\n";
}
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