mirror of
git://git.sv.gnu.org/autoconf
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151 lines
3.8 KiB
Perl
151 lines
3.8 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, 2003 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, $datadir;
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# Override SHELL. On DJGPP SHELL may not be set to a shell
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# that can handle redirection and quote arguments correctly,
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# e.g.: COMMAND.COM. For DJGPP always use the shell that configure
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# has detected.
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$ENV{'SHELL'} = '@SHELL@' if ($^O eq 'dos');
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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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";
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# $VERSION
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# --------
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$version = "ifnames (@PACKAGE_NAME@) @VERSION@
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Written by David J. MacKenzie and Paul Eggert.
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Copyright (C) 2004 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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";
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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 ($FILE-NAME)
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# -----------------------
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sub scan_file ($)
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{
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my ($file_name) = @_;
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my $file = new Autom4te::XFile ($file_name);
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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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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{$word}{$file_name} = 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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### Setup "GNU" style for perl-mode and cperl-mode.
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## Local Variables:
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## perl-indent-level: 2
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## perl-continued-statement-offset: 2
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## perl-continued-brace-offset: 0
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## perl-brace-offset: 0
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## perl-brace-imaginary-offset: 0
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## perl-label-offset: -2
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## cperl-indent-level: 2
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## cperl-brace-offset: 0
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## cperl-continued-brace-offset: 0
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## cperl-label-offset: -2
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## cperl-extra-newline-before-brace: t
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## cperl-merge-trailing-else: nil
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## cperl-continued-statement-offset: 2
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## End:
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