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#!/usr/bin/env perl## checkincludes: find/remove files included more than once## Copyright abandoned, 2000, Niels Kristian Bech Jensen <nkbj@image.dk>.# Copyright 2009 Luis R. Rodriguez <mcgrof@gmail.com>## This script checks for duplicate includes. It also has support# to remove them in place. Note that this will not take into# consideration macros so you should run this only if you know# you do have real dups and do not have them under #ifdef's. You# could also just review the results. use strict; sub usage {	print "Usage: checkincludes.pl [-r]\n";	print "By default we just warn of duplicates\n";	print "To remove duplicated includes in place use -r\n";	exit 1;} my $remove = 0; if ($#ARGV < 0) {	usage();} if ($#ARGV >= 1) {	if ($ARGV[0] =~ /^-/) {		if ($ARGV[0] eq "-r") {			$remove = 1;			shift;		} else {			usage();		}	}} my $dup_counter = 0; foreach my $file (@ARGV) {	open(my $f, '<', $file)	    or die "Cannot open $file: $!.\n"; 	my %includedfiles = ();	my @file_lines = (); 	while (<$f>) {		if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {			++$includedfiles{$1};		}		push(@file_lines, $_);	} 	close($f); 	if (!$remove) {		foreach my $filename (keys %includedfiles) {			if ($includedfiles{$filename} > 1) {				print "$file: $filename is included more than once.\n";				++$dup_counter;			}		}		next;	} 	open($f, '>', $file)	    or die("Cannot write to $file: $!"); 	my $dups = 0;	foreach (@file_lines) {		if (m/^\s*#\s*include\s*[<"](\S*)[>"]/o) {			foreach my $filename (keys %includedfiles) {				if ($1 eq $filename) {					if ($includedfiles{$filename} > 1) {						$includedfiles{$filename}--;						$dups++;						++$dup_counter;					} else {						print {$f} $_;					}				}			}		} else {			print {$f} $_;		}	}	if ($dups > 0) {		print "$file: removed $dups duplicate includes\n";	}	close($f);} if ($dup_counter == 0) {	print "No duplicate includes found.\n";}