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See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # Reads from stdin if no files are given. # Writes to stdout. # Written by David MacKenzie # and Paul Eggert . BEGIN { my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '/usr/share/autoconf'; unshift @INC, $pkgdatadir; # Override SHELL. On DJGPP SHELL may not be set to a shell # that can handle redirection and quote arguments correctly, # e.g.: COMMAND.COM. For DJGPP always use the shell that configure # has detected. $ENV{'SHELL'} = '/bin/sh' if ($^O eq 'dos'); } use Autom4te::General; use Autom4te::XFile; use Autom4te::FileUtils; # $HELP # ----- $help = "Usage: $0 [OPTION]... [FILE]... Scan all of the C source FILES (or the standard input, if none are given) and write to the standard output a sorted list of all the identifiers that appear in those files in `#if', `#elif', `#ifdef', or `#ifndef' directives. Print each identifier on a line, followed by a space-separated list of the files in which that identifier occurs. -h, --help print this help, then exit -V, --version print version number, then exit Report bugs to . GNU Autoconf home page: . General help using GNU software: . "; # $VERSION # -------- $version = "ifnames (GNU Autoconf) 2.69 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+/Autoconf: GNU GPL version 3 or later , This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by David J. MacKenzie and Paul Eggert. "; # &parse_args () # -------------- # Process any command line arguments. sub parse_args () { getopt (); } # %OCCURRENCE # ----------- my %occurrence; # &scan_file ($FILE-NAME) # ----------------------- sub scan_file ($) { my ($file_name) = @_; my $file = new Autom4te::XFile ("< " . open_quote ($file_name)); while ($_ = $file->getline) { # Continuation lines. $_ .= $file->getline while (s/\\$//); # Preprocessor directives. if (s/^\s*\#\s*(if|ifdef|ifndef|elif)\s+//) { # Remove comments. Not perfect, but close enough. s(/\*.*?\*/)(); s(/\*.*)(); s(//.*)(); foreach my $word (split (/\W+/)) { next if $word eq 'defined' || $word !~ /^[a-zA-Z_]/; $occurrence{$word}{$file_name} = 1; } } } } ## ------ ## ## Main. ## ## ------ ## parse_args(); foreach (@ARGV) { scan_file ($_); } foreach (sort keys %occurrence) { print "$_ ", join (' ', sort keys %{$occurrence{$_}}), "\n"; } ### Setup "GNU" style for perl-mode and cperl-mode. ## Local Variables: ## perl-indent-level: 2 ## perl-continued-statement-offset: 2 ## perl-continued-brace-offset: 0 ## perl-brace-offset: 0 ## perl-brace-imaginary-offset: 0 ## perl-label-offset: -2 ## cperl-indent-level: 2 ## cperl-brace-offset: 0 ## cperl-continued-brace-offset: 0 ## cperl-label-offset: -2 ## cperl-extra-newline-before-brace: t ## cperl-merge-trailing-else: nil ## cperl-continued-statement-offset: 2 ## End: