source4/script/find_unused_macros.pl

   1 #!/usr/bin/perl
   2 # Script that reads in C files and prints defines that are used nowhere in the
   3 # code
   4
   5 # Arguments: C and H files
   6 # Copyright Jelmer Vernooij <jelmer@samba.org>, GPL
   7
   8 use strict;
   9
  10 my %defined;
  11 my %used;
  12 my %files;
  13
  14 my $tmp;
  15 while($tmp = shift) {
  16         $files{$tmp} = $tmp;
  17         open(FI, $tmp);
  18         my $ln = 0;
  19         while(<FI>) {
  20                 $ln++;
  21                 my $line = $_;
  22                 my $cur = "";
  23                 if(/^#define ([A-Za-z0-9_]+)/) {
  24                         $defined{$1} = "$tmp:$ln";
  25                         $cur = $1;
  26                 }
  27
  28                 $_ = $line;
  29                 while(/([A-Za-z0-9_]+)/sgm) {
  30                         if($cur ne $1) { $used{$1} = "$tmp:$ln"; }
  31                 }
  32         }
  33         close FI;
  34 }
  35
  36 foreach(keys %defined) {
  37         if(!$used{$_}) { print "$defined{$_}: Macro `$_' is unused\n"; }
  38 }