mirror of
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126 lines
3.0 KiB
Perl
126 lines
3.0 KiB
Perl
#! @PERL@ -w
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# -*- perl -*-
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# @configure_input@
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eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
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if 0;
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# ifnames - print the identifiers used in C preprocessor conditionals
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# Copyright (C) 1994, 1995, 1999, 2000, 2001, 2002 Free Software
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# Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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# Reads from stdin if no files are given.
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# Writes to stdout.
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# Written by David MacKenzie <djm@gnu.ai.mit.edu>
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# and Paul Eggert <eggert@twinsun.com>.
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BEGIN
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{
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my $datadir = ($ENV{'autom4te_perllibdir'} || '@datadir@');
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unshift @INC, "$datadir";
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}
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use Autom4te::General;
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use Autom4te::XFile;
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# $HELP
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# -----
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$help = "Usage: $0 [OPTION] ... [FILE] ...
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Scan all of the C source FILES (or the standard input, if none are
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given) and write to the standard output a sorted list of all the
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identifiers that appear in those files in `#if', `#elif', `#ifdef', or
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`#ifndef' directives. Print each identifier on a line, followed by a
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space-separated list of the files in which that identifier occurs.
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-h, --help print this help, then exit
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-V, --version print version number, then exit
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Report bugs to <bug-autoconf\@gnu.org>.";
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# $VERSION
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# --------
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$version = "\
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ifnames (@PACKAGE_NAME@) @VERSION@
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Written by David J. MacKenzie and Paul Eggert.
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Copyright 2002 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.";
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# &parse_args ()
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# --------------
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# Process any command line arguments.
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sub parse_args ()
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{
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getopt ();
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}
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# %OCCURRENCE
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# -----------
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my %occurrence;
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# &scan_file ($FILENAME)
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# ----------------------
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sub scan_file ($)
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{
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my ($filename) = @_;
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my $file = new Autom4te::XFile ($filename);
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while ($_ = $file->getline)
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{
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# Continuation lines.
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$_ .= $file->getline
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while (s/\\$//);
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# Preprocessor directives.
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if (s/^\s*\#\s*(if|ifdef|ifndef|elif)\s+//)
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{
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# Remove comments. Not perfect, but close enough.
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s(/\*.*?\*/)();
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s(/\*.*)();
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foreach my $word (split (/\W+/))
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{
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next
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if $word eq 'defined' || $word !~ /^[a-zA-Z_]/;
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$occurrence{$word}{$filename} = 1;
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}
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}
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}
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}
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## ------ ##
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## Main. ##
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## ------ ##
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parse_args();
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foreach (@ARGV)
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{
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scan_file ($_);
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}
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foreach (sort keys %occurrence)
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{
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print "$_ ", join (' ', sort keys %{$occurrence{$_}}), "\n";
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}
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